JP2011193600A - Armature for rotary electric machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To achieve an armature for rotary electric machine having high design flexibility wherein the number of conductors in the slots can be set to an odd number in the radial direction, and the number of turns of a coil can be set arbitrarily according to the requested characteristics of the rotary electric machine. <P>SOLUTION: A coil 20 is equipped with a plurality of phase coils of phases different from each other, segment conductors 40a arranged in the same layer are arranged so that the side part of the conductor adjoins the bottom surface 3a of the slot, one part 52a of transition of the segment conductor 40a of each phase coil arranged in the same layer is provided with an offset region 90 which offsets with respect to the other part 52b of transition of the segment conductor 40a of each phase coil arranged in the same layer to the opposite side of the magnetic field in the radial direction R, and is arranged in the offset region 90 to overlap the other part 52b of transition of the segment conductor 40a in the other phase coil arranged in the same layer in the circumferential direction C. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention comprises an armature core in which a plurality of slots extending in the axial direction of a cylindrical core reference surface are distributed in the circumferential direction of the core reference surface, and a coil wound around the armature core. The present invention relates to an armature for a rotating electrical machine that is disposed so as to face a magnetic field in the radial direction of the core reference surface and forms a rotating electrical machine together with the field.

  In order to increase the space factor of the coil in the armature for a rotating electrical machine, the conductor side portion of the segment conductor of a rectangular wire formed in a U shape (a linear conductor having a rectangular cross section) is placed in the slot of the armature core. A technique for arranging coils regularly by joining regularly extending portions of different segment conductors is known (see, for example, Patent Document 1 below). In the configuration described in Patent Document 1, as shown in FIGS. 3 and 4 of the document, by forming a crank-shaped portion 32 in the transition portion of the segment conductor 30, the segment conductors are aligned at the coil end portion. The accuracy is improved.

JP 2003-18778 (paragraphs [0013] to [0015], FIG. 3, FIG. 4 etc.)

  However, in the configuration described in Patent Document 1, the segment conductor is formed so that the crank-shaped portion is displaced in the radial direction by the width of one conductor, and as is apparent from the contents of FIGS. The pair of conductor side portions are arranged at positions where their radial positions are shifted from each other by one conductor in different slots of the armature core. Therefore, in the configuration described in Patent Document 1, the number of conductors arranged in the radial direction in the slot must be an even number, and the number of radial conductors in the slot cannot be an odd number. However, since the magnitude of the torque and back electromotive force that can be generated varies depending on the number of turns (number of turns) of the rotating electrical machine, the number of radial conductors in the slot is an odd number to obtain the required characteristics. It may be desirable to The technique disclosed in Patent Document 1 has a problem that the degree of freedom in design of the rotating electrical machine in such a case is low.

  Therefore, it is possible to make the number of radial conductors in the slot an odd number, and it is easy to set the number of turns (number of turns) of the coil according to the required characteristics of the rotating electrical machine. Realization of an armature for an electric machine is desired.

  An armature core according to the present invention, in which a plurality of slots extending in the axial direction of a cylindrical core reference surface are distributed in the circumferential direction of the core reference surface, and a coil wound around the armature core. A rotating electric machine armature that is disposed opposite to the field in the radial direction of the core reference surface and constitutes the electric rotating machine together with the field, the coil is composed of a plurality of different phase coils Each phase coil is formed by joining a plurality of segment conductors, and the segment conductors are a pair of conductor side portions respectively disposed in the different slots, and the axially outer side of the armature core. Continuous conductors connecting one end of the pair of conductor side parts and a pair of extending parts extending from the other end of each of the pair of conductor side parts to the outer side in the axial direction of the armature core Formed with The field side in the radial direction of the core reference surface is a radial field side, and the opposite side to the field is a radial demagnetizing side, and the slot is a wall surface on the radial demagnetizing side. Each of the segment conductors has a circumferentially intermediate position relative to the intermediate position in the circumferential direction, the one side portion in the circumferential direction is a bridging portion one portion, and the other circumferential portion is the bridging portion other portion. The segment conductors arranged at the same radial position in the slots having different conductor side parts are the same layer arranged segment conductors, and the same layer arranged segment conductor has the conductor side parts adjacent to the bottom surface of the slot. The crossing part one part of the same-layer arrangement segment conductor of each phase coil is arranged with respect to the other part of the crossing part segment conductor of the phase coil An offset region offset to the direction demagnetizing side is provided, and the offset region is disposed so as to overlap in the circumferential direction with respect to the other portion of the cross-layered segment conductor in the phase coil of the other phase. In the point.

  In the present application, the “rotary electric machine” is used as a concept including a motor (electric motor), a generator (generator), and a motor / generator that functions as both a motor and a generator as necessary. In addition, regarding the arrangement of two members, “overlap” in a certain direction means that each of the two members has at least a portion that is at the same position with respect to the arrangement in the direction.

According to this characteristic configuration, the same-layer arranged segment conductors are arranged in a layer adjacent to the bottom surface of the slot, and one of the crossed portions of the same-layer arranged segment conductor is crossed between the same-layer arranged segment conductors of other phases in the offset region. It arrange | positions so that it may overlap with the other part part and the circumferential direction. Therefore, in the portion where the continuous crossover portions of the same-layer arranged segment conductors of different phases arranged in the layer adjacent to the bottom surface of the slot overlap each other when viewed from either side in the radial direction, the continuous crossover portions interfere with each other. It has a configuration that can be suppressed. In other words, the same layer arrangement segment conductors constituting each phase coil can be arranged in at least a layer adjacent to the bottom surface of the slot, and a coil having phase coils of different phases can be constituted in the layer. ing. Therefore, the number of conductor side portions arranged in the radial direction in the slot can be set to an odd number, and the design freedom for easily setting the number of turns (turns) of the coil according to the required characteristics of the rotating electrical machine is easy. An armature for a rotating electrical machine having a high degree can be realized.
In addition, the radial width occupied by the coil end portion is larger than the radial range occupied by the conductor side portion of the same-layer arranged segment conductor according to the offset width of the offset region provided in the one part of the crossed portion of the same-layer arranged segment conductor. However, since the offset direction of the offset region is on the radial demagnetization side, the coil end portion and the field are less likely to interfere with each other when the rotating electrical machine is manufactured. Further, since the coil of the other layer is not arranged on the radial demagnetization side which is the offset direction of the offset region with respect to the same-layer arranged segment conductor arranged in the layer adjacent to the bottom surface of the slot, the coil of the other layer is not arranged. Without affecting the above, it is possible to appropriately arrange the continuous crossing portions of the same-layer arranged segment conductors arranged in the layer adjacent to the bottom surface of the slot.

  Here, the coil has an m-layer winding structure in which m conductor side portions (m: odd number of 3 or more) are arranged in the radial direction in each slot, and the pair of conductor side portions are different from each other. The segment conductors arranged so as to be adjacent to each other in the inside are defined as adjacent layer arranged segment conductors, and the conductors of the same layer arranged segment conductors are arranged in the most radially opposite field side layer in each slot. It is preferable that the side portion is arranged and the conductor side portion of the adjacent layer arrangement segment conductor is arranged in the other layers.

  According to this configuration, the same-layer arrangement segment conductor arranged in units of a single layer with respect to the armature core, and the adjacent layer arrangement segment arranged in units of two layers adjacent to the armature core An armature for a rotating electrical machine including a coil having an odd-numbered winding structure (m-layer winding structure) of three or more layers in which the number of conductor side portions arranged in the radial direction in the slot is an odd number Can be configured. At this time, the same-layer arranged segment conductor having an offset region in which one portion of the crossover portion is offset to the radial direction field side is arranged in the layer on the most radial direction field side in the slot. It is possible to appropriately arrange the continuous crossing portions of the same-layer arranged segment conductors without affecting the coil.

  In addition, the one part of the crossing portion of the segment conductor of the same layer is viewed from one side in the radial direction, and the one side circumference toward the side away from the armature core in the axial direction as it goes to the other side in the circumferential direction. A side extending from the armature core in the axial direction as viewed from one side in the radial direction and toward the other side in the circumferential direction. The other-side circumferentially extending portion, and at least a part of the one-side circumferentially extending portion is used as the offset region, and the same-layer arranged segment conductor of each phase coil is the one side The offset region in the circumferentially extending portion is seen from one side in the radial direction, and the other side circumference of the same-layer arranged segment conductor in the phase coil of the other phase. It is preferable to be arranged so as to intersect the Konobezai unit.

According to this configuration, in the portion where the continuous crossing portions of the same-layer arrangement segment conductors of different phases overlap each other when viewed from one side in the radial direction, in the one-side circumferential extension portion of one of the same-layer arrangement segment conductors Since the offset region overlaps the other side circumferentially extending portion of the other in-layer arrangement segment conductor, the in-layer arrangement segments constituting each phase coil are more reliably suppressed from interfering with each other between the continuous crossing portions. The conductors can be arranged on the same layer.
Furthermore, the one side circumferentially extending portion is formed so as to go to the side away from the armature core in the axial direction as going to the other circumferential side, and the other side circumferentially extending portion goes to the one circumferential side. Accordingly, when the number of slots per phase per pole is set to a value of 2 or more, the same phase arranged in the same layer is formed. It is also easy to suppress interference between continuous crossing portions of the same-layer arranged segment conductors.

  Further, as described above, the offset region in the one-side circumferential extending portion included in the same-layer arranged segment conductor is the same layer in the phase coil of the other phase when viewed from any one side in the radial direction. In the configuration in which the same-layer arranged segment conductors constituting each phase coil are arranged so as to intersect with the other-side circumferential extending portion of the arranged segment conductor, the crossing of the same-layer arranged segment conductors One part of the part is offset at the same circumferential position as the conductor side part connected to one side in the circumferential direction, and the one side circumferentially extending part is offset to the radial demagnetizing side with respect to the conductor side part. The continuous crossing portion of the same-layer arranged segment conductor is provided at the intermediate position in the circumferential direction of the continuous crossing portion, the radial position and the extending direction being different from each other. When provided with a deflection offset bent portion connected to the circumferential extending portion and said other side peripheral extending portion is suitable.

According to this configuration, since the circumferential width of the offset region in the one portion of the crossover portion can be increased, the continuous crossover portions of the same-layer arranged segment conductors of different phases arranged in the same layer interfere with each other. While suppressing this, it is easy to increase the number of slots per pole per phase.
In addition, since the turning offset bent portion is formed at a position farthest from the armature core in the axial direction in the continuous crossing portion, it is easy to appropriately secure an arrangement space for the turning offset bent portion. ing. Therefore, the degree of freedom of the structure that can be adopted as the deflecting offset bent portion is increased, and an appropriate configuration can be adopted from the viewpoint of reducing the manufacturing cost.

  Further, each of the phase coils has a joint bridging portion formed by joining the extending portions extending from the conductor side portions arranged in different slots from each other on the outer side in the axial direction of the armature core. The first direction side extension part, the circumferential direction on the opposite side to the first direction side in the circumferential direction, is located on the first direction side in the circumferential direction of the pair of extension parts constituting the joining crossover part. What is located on the second direction side is a second direction side extending portion, and the first direction side extending portion of the same layer arranged segment conductor of each phase coil is the same layer arranged segment of each phase coil. The second direction of the same-layer arranged segment conductor in the phase coil of the other phase in the offset region with an offset region offset to the radial demagnetizing side with respect to the second direction side extension portion of the conductor It overlaps in the circumferential direction with respect to the side extension The first direction side extension portion provided in the same layer arrangement segment conductor and the second direction side extension portion of the other same layer arrangement segment conductor in the phase coil of the same phase. It is preferable that the corrugated coil portions of each phase are formed by joining the surfaces facing each other in the radial direction.

  According to this configuration, the first-direction extension part of the same-layer arrangement segment conductor is arranged so as to overlap the second-direction extension part of the same-phase arrangement segment conductor of the other phase in the offset region in the circumferential direction. The Therefore, in the portion where the joining transition portions formed by the same-layer arranged segment conductors of different phases arranged in the layer adjacent to the bottom surface of the slot overlap each other when viewed from one side in the radial direction, the joining transition portions are mutually connected. It is the structure which can suppress interfering. Thus, according to this structure, the structure of the joining transition part formed by joining a pair of extension part can be made into the structure substantially the same as a continuous transition part. In other words, the configuration of the crossing portions on both axial sides of the armature core can be made substantially the same.

It is a perspective view of the stator which concerns on embodiment of this invention. It is the figure which looked at the stator which concerns on embodiment of this invention from the axial direction one side. It is a partial cross section figure of the stator which concerns on embodiment of this invention. It is a perspective view of the stator in the state where only the first layer coil concerning the embodiment of the present invention was wound. It is a perspective view of the same layer arrangement segment conductor concerning an embodiment of the present invention. It is a perspective view of one phase coil which constitutes the first layer coil concerning the embodiment of the present invention. It is VII-VII sectional drawing in FIG. It is a perspective view of the 1st layer coil concerning the embodiment of the present invention. It is a perspective view of one phase coil which constitutes the second layer coil and third layer coil concerning an embodiment of the present invention. It is XX sectional drawing in FIG. It is a perspective view of the 2nd layer coil and 3rd layer coil which concern on embodiment of this invention. It is a partial perspective view of the stator in the state where only the first layer coil according to another embodiment of the present invention is wound. It is a perspective view of the same layer arrangement | positioning segment conductor which concerns on another embodiment of this invention. It is the figure which looked at the continuous crossing part of the same layer arrangement | positioning segment conductor which concerns on another embodiment of this invention from the axial direction one side.

  An embodiment of an armature for a rotating electrical machine according to the present invention will be described with reference to the drawings. Here, a case where the present invention is applied to a stator of an inner rotor type rotating electrical machine will be described as an example. In the stator 1 according to the present embodiment, as shown in FIG. 1 and the like, the same-layer arranged segment conductors 40a of the respective phases constituting the first layer coil 21 are provided with the first offset region 90 in the crossover one portion 52a. It is characterized in that Thereby, the same layer arrangement segment conductor 40a which comprises each phase coil 25 is arrange | positioned at least in the layer (1st layer) adjacent to the slot bottom face 3a, and the coil provided with the phase coil 25 of a mutually different phase in the said layer 20 can be configured. Hereinafter, the configuration of the stator 1 according to the present embodiment will be described in detail. In the drawings referred to in the following description, for the sake of simplification, a joint between different turns, a joint for forming a neutral point, a connection with a terminal for connecting to a power source, and these The odd-shaped segment conductors and bent portions for forming are omitted.

  In the following description, unless otherwise specified, the “axial direction L”, “circumferential direction C”, and “radial direction R” are defined with reference to the axial center of a cylindrical core reference plane described later. In the following description, “one axial direction L1” represents the upper side along the axial direction L in FIG. 1, and “other axial direction L2” represents the lower side along the axial direction L in FIG. It shall represent. In the following description, as shown in FIG. 1, “circumferential one side C <b> 1” represents a clockwise direction side when the stator 1 (stator core 2) is viewed from the axial one side L <b> 1. The “other side C2” represents the counterclockwise direction side when the stator 1 (stator core 2) is viewed from the one axial side L1. In the following description, each direction of the coil 20 and the segment conductor 40 constituting the coil 20 is defined as a direction in a state where the coil 20 and the segment conductor 40 are attached to the stator core 2.

  In the present embodiment, the stator 1 and the stator core 2 correspond to the “armature for rotating electrical machine” and the “armature core” in the present invention, respectively. Moreover, in this embodiment, the stator 1 is a stator of an inner rotor type rotating electrical machine in which a rotor as a field is disposed on the radially inner side R1. Therefore, if the field side in the radial direction R is the radial field side and the opposite side of the field is the radial counter field side, in this embodiment, the radial inner side R1 and the radial outer side R2 are These correspond to the “radial field side” and the “radial field side” in the present invention, respectively.

1. Overall Configuration of Stator The overall configuration of the stator 1 according to this embodiment will be described with reference to FIG. As shown in FIG. 1, the stator 1 includes a stator core 2 and a coil 20 and is configured as an armature for a rotating electrical machine. The stator core 2 is formed using a magnetic material, and a plurality of slots 3 extending in the circumferential direction C of the core reference surface are provided in order to enable the coil 20 to be wound. The stator cores 2 are formed in a distributed manner (48 in the example). Here, the “cylindrical core reference plane” is a virtual plane that serves as a reference for the arrangement and configuration of the slots 3. In this embodiment, as shown in FIGS. 1 to 3, the core is a virtual cylindrical surface including the end surface of the radially inner side R1 of the teeth 5 located between the slots 3 adjacent to each other in the circumferential direction C. A circumferential surface can be defined, and this cylindrical core inner circumferential surface can be used as a “cylindrical core reference surface” in the present invention. Moreover, it is concentric with the cylindrical inner peripheral surface, and the cross-sectional shape in the axial direction L (when viewed along the axial direction L) is similar to the cross-sectional shape in the axial direction L of the core inner peripheral surface. Cylindrical surfaces (including virtual surfaces) in relation can also be “cylindrical core reference surfaces” in the present invention. For example, in this embodiment, as shown in FIG. 1 to FIG. 3, the stator core 2 is formed in a cylindrical shape, and therefore the outer peripheral surface of the stator core 2 excluding the mounting protrusion is defined as a “cylindrical core reference surface”. It can also be.

  The stator core 2 has a plurality of slots 3 distributed in the circumferential direction C on the inner circumferential surface of the cylindrical core. The plurality of slots 3 are arranged at predetermined circumferential intervals, and are provided so as to extend in the axial direction L. The slots 3 are formed to have the same cross-sectional shape (rectangular shape in this example) in a plane orthogonal to the axial direction L. Further, the slot 3 has a slot bottom surface 3a which is a wall surface on the radial demagnetizing side (same as the radial outer side R2 in this embodiment), and is open to the radial inner side R1.

  In the present embodiment, the stator 1 is a stator used in a rotating electrical machine driven by three-phase alternating current (U phase, V phase, W phase). Therefore, the U-phase, V-phase, and W-phase slots 3 are arranged in the stator core 2 so as to repeatedly appear along the circumferential direction C. In this example, the stator core 2 has two slots 3 adjacent to each other for the U phase and two slots 3 adjacent to each other for the V phase so that the number of slots per pole per phase is “2”. And two slots 3 adjacent to each other for the W phase are formed so as to repeatedly appear in the order of description along the circumferential direction C (in this example, toward the other circumferential side C2). The coil 20 is also formed in a three-phase configuration (U phase, V phase, W phase) in accordance with the number of phases (three in this example) of the slot 3 formed in the stator core 2. That is, the coil 20 includes a plurality of (three in this example) U-phase coil 25u, which are phase coils 25 of different phases, a V-phase coil 25v, and a W-phase coil 25w (FIGS. 8 and 8). 11). As will be described in detail later, the coil 20 is wound around the stator core 2 by wave winding. Since the phase coil 25 (U-phase coil 25u, V-phase coil 25v, W-phase coil 25w) of each phase included in the coil 20 has the same configuration, in the following description, each phase is excluded unless necessary. The phase coils 25u, 25v, and 25w will be described without distinction.

  And although illustration is abbreviate | omitted, in the radial direction inner side R1 of the stator 1 (stator core 2), the rotor as a field magnet provided with the permanent magnet or the electromagnet is arrange | positioned so that relative rotation with respect to the stator 1 is possible. That is, the stator 1 is disposed to face the rotor as a field in the radial direction R, and constitutes a rotating electrical machine together with the rotor. Then, the rotor is rotated by the rotating magnetic field generated from the stator 1. That is, the stator 1 according to the present embodiment is an inner rotor type rotating field type stator for a rotating electrical machine.

  Note that the stator core 2 as described above is, for example, a laminated structure in which a plurality of annular plate-shaped electromagnetic steel plates are laminated, or a powder material formed by pressure-forming a magnetic material that is a magnetic material powder. It can be formed as a main component. In the present embodiment, the stator core 2 is formed with a plurality of slots 3 so that the number of slots per phase per pole is “2”. Of course, the number of slots per phase per pole is It can be changed as appropriate. For example, the number of slots per pole per phase can be set to “1”, “3”, or the like. In the present embodiment, the stator 1 is configured as a stator used in a rotating electrical machine driven by a three-phase alternating current. However, the number of phases of the AC power source that drives the rotating electrical machine can be changed as appropriate. “1”, “2”, “4”, etc. Of course, the number of phase coils 25 included in the coil 20 is appropriately changed according to the number of phases of the AC power supply.

2. Next, the configuration of the coil 20 according to the present embodiment will be described in detail. In this embodiment, as shown in FIG. 3, the coil 20 has a three-layer winding structure in which three conductor side portions 50 (details will be described later) are arranged in the radial direction R in each slot 3. That is, in each slot 3, the three conductor side portions 50 are arranged in a line so as to overlap (stack) in the radial direction R. In this specification, the position of the conductor side portion 50 in each slot 3 will be described with layer numbers in order from the radially outer side R2 toward the radially inner side R1. Therefore, in the present embodiment, the radially outermost layer is the first layer, and the radially innermost layer is the third layer. Moreover, in the following description, the coil which the conductor side part 50 arrange | positioned at the 1st layer comprises is called the 1st layer coil 21, and the coil which the conductor side part 50 arrange | positioned at the 2nd layer comprises is the 2nd layer. The coil 22 is referred to as a coil formed by the conductor side portion 50 arranged in the third layer, and is referred to as a third layer coil 23. In this example, although the details will be described later, the second layer coil 22 and the third layer coil 23 are integrally formed.

  Each phase coil 25 included in the coil 20 is configured by joining a plurality of segment conductors 40. As shown in FIG. 5, the segment conductor 40 connects a pair of conductor side portions 50 respectively disposed in different slots 3 and one end of the pair of conductor side portions 50 outside the stator core 2 in the axial direction L. The continuous crossing portion 52 (52a, 52b) and the pair of extending portions 51 (51a, 51b) extending from the other ends of the pair of conductor side portions 50 to the outside in the axial direction L of the stator core 2 are connected to the continuous conductor. It is formed by. The conductor side portion 50 is disposed along the axial direction L in the slot 3. In the following description, the C1 portion in the circumferential direction from the circumferential intermediate position (in the present embodiment, coincides with the circumferential central position in the present embodiment, the same applies hereinafter) in each continuous crossing portion 52 of the segment conductor 40. The portion 52a and the other circumferential side C2 portion are referred to as a crossing portion other portion 52b. In addition, such a segment conductor 40 is attached along the axial direction L from the outside in the axial direction L to the slot 3 of the stator core 2 in a form in which the continuous crossing portion 52 is positioned on the rear side in the insertion direction, for example. Alternatively, it is mounted along the radial direction R from the radially inner side R <b> 1 to the slot 3 of the stator core 2.

  As shown in FIG. 3, the segment conductor 40 is configured by a linear conductor having a rectangular cross section cut along a plane orthogonal to the extending direction (equal to the energizing direction). The material constituting this linear conductor can be, for example, copper or aluminum. Further, the surface of the linear conductor is covered with an insulating film made of a resin or the like (for example, polyimide or the like) except for an electrical connection location between different members (a location where a joint portion 30 described later is formed). In this example, as shown in FIG. 3, the conductor side portion 50 is arranged in the slot 3 so that the longitudinal direction of the cross section of the linear conductor is along the radial direction R.

  The coil 20 is configured by sequentially joining such segment conductors 40 (more precisely, the extending portions 51 included in the segment conductors 40). In addition, joining of the extension parts 51 of the different segment conductors 40 is performed by arc welding, such as TIG welding, electron beam welding, laser beam welding, resistance welding, brazing, soldering, etc., for example. In this embodiment, the coil 20 is formed by joining a plurality of segment conductors 40 in a wave shape, and a first wave-wound coil 61 (see FIG. 6) formed by a same-layer arranged segment conductor 40a described later. A second wave coil 62 (see FIG. 9) formed by an adjacent layer arrangement segment conductor 40b described later is provided corresponding to each of the three phases. In other words, each of the plurality of different phase coils 25 (in this example, the U-phase coil 25u, the V-phase coil 25v, and the W-phase coil 25w) included in the coil 20 includes the first wave winding coil 61 and the second wave winding coil 61, respectively. A wave winding coil 62 is provided. And the 1st wave winding coil 61 and the 2nd wave winding coil 62 which comprise the same phase are mutually connected in series or in parallel.

  In the present embodiment, the first wave coil 61 is arranged in the first layer that is the outermost layer in the radial direction R in the plurality of slots 3, and the second layer and the third layer that are other layers are arranged in the first layer. The second wave winding coil 62 is arranged. That is, the first layer coil 21 includes a first wave coil 61, and the second layer coil 22 and the third layer coil 23 include a second wave coil 62. Hereinafter, the configuration of the first layer coil 21, the second layer coil 22, and the third layer coil 23 will be described in detail. In the present embodiment, the first wave coil 61 corresponds to the “wave coil portion” in the present invention.

2-1. Overall Configuration of First Layer Coil The first layer coil 21 includes the first wave winding coil 61 as described above. The stator core 2 includes two adjacent slots 3 for the U phase, two adjacent slots 3 for the V phase, and two adjacent slots 3 for the W phase in the order described. It is formed so as to repeatedly appear along the circumferential direction C. In accordance with the arrangement configuration of the slots 3 of each phase, in this embodiment, as shown in FIG. 6, a pair of first wave coils are arranged in a positional relationship shifted by one slot in the circumferential direction C as shown in FIG. A set of 61 constitutes one phase coil 25 included in the first layer coil 21. In FIG. 6, one first wave winding coil 61 is highlighted to facilitate understanding of the configuration of the first wave winding coil 61.

  Then, as shown in FIG. 8, a pair of first waves arranged in a positional relationship in which the set of the pair of first wave coils 61 shown in FIG. 6 is shifted by 4 slots and 8 slots on one circumferential side C1. Each of the sets of the wound coils 61 constitutes another two-phase phase coil 25 included in the first layer coil 21. In addition, since each of the 1st wave winding coil 61 which comprises the 1st layer coil 21 has the mutually similar structure although the circumferential direction C position with respect to the stator core 2 differs, below, unless required, These will be described without distinction.

  The first wave-wound coil 61 is configured using the same-layer arrangement segment conductor 40a as shown in FIG. The same-layer arranged segment conductors 40a are segment conductors 40 in which the pair of conductor side portions 50 are arranged at the same radial direction R position in different slots 3, and in this embodiment, a pair of the same-layer arranged segment conductors 40a The conductor side portion 50 is disposed on the outermost radial outer layer R2 (first layer) in each slot 3. In other words, in the same layer arrangement segment conductor 40a, the conductor side portion 50 is arranged adjacent to the slot bottom surface 3a. Further, in this example, as shown in FIG. 4, the pair of conductor side portions 50 included in the same-layer arranged segment conductors 40 a are separated from each other in the circumferential direction C by a distance corresponding to 6 times the arrangement pitch of the slots 3. A pair of slots 3 are arranged respectively.

  As shown in FIG. 6, the first wave-wound coil 61 has a plurality of (four in this example) same-layer arranged segment conductors arranged at intervals corresponding to two magnetic pole pitches along the circumferential direction C. 40a is used. Specifically, the first wave-wound coil 61 uses the plurality of same-layer arranged segment conductors 40a and, as shown in FIG. 6, the extended portions 51 (51a, 51b) of the adjacent same-layer arranged segment conductors 40a. ) Are coiled in a wave-like shape by joining them one after another and making a round in the circumferential direction C. That is, the first wave coil 61 is a one-turn (one round) wave coil. The two magnetic pole pitch is twice the magnetic pole pitch, which is a distance corresponding to π in electrical angle.

  As shown in FIG. 4, the same-layer arranged segment conductor 40 a constituting the first wave winding coil 61 is arranged such that the continuous crossing portion 52 is positioned outside the axial direction L of the axial one side L <b> 1 with respect to the stator core 2. It is arranged on the stator core 2. Therefore, the joint portion 30, which is a joint portion between the end portions of the extending portions 51 of the different same-layer arranged segment conductors 40 a, is located outside the axial direction L on the other axial side L <b> 2 with respect to the stator core 2. That is, each phase coil 25 has a connecting cross portion 53 formed by joining extending portions 51 extending from conductor side portions 50 arranged in different slots 3 with respect to the stator core 2 in the other axial direction. It is on the outside in the axial direction L of L2. In the following description, the one located on the circumferential first direction side of the pair of extending portions 51 constituting the joining and connecting portion 53 is referred to as a first direction extending portion 51a, and the circumferential first direction side and Is a second direction side extending portion 51b located on the opposite circumferential direction second direction side. In the present embodiment, the circumferential first direction side coincides with the circumferential other side C2, and the circumferential second direction side coincides with the circumferential one side C1.

  By the way, all the same-layer arrangement segment conductors 40a of the respective phases constituting the first layer coil 21 have the conductor side portions 50 arranged in the first layer. Then, as shown in FIG. 4, in the coil end portion on the one axial side L <b> 1, the continuous crossover portions 52 for forming the phase coils 25 of different phases are arranged overlapping in the circumferential direction C. In addition, in the coil end portion on the other axial side L2, the joint connecting portions 53 for forming the phase coils 25 of different phases are overlapped with each other in the circumferential direction C. In the present embodiment, the continuous crossover portions 52 and the joint crossover portions 53 that are arranged so as to overlap in the circumferential direction C are prevented from interfering with each other, and each phase constituting the first layer coil 21 is suppressed. The conductor side portion 50 of the same layer arrangement segment conductor 40a can be arranged in the first layer. Hereinafter, the configuration of the continuous crossover portion 52 and the joint crossover portion 53 for realizing such an arrangement configuration will be described in detail in order.

2-2. Configuration of Continuous Cross Section in First Layer Coil As shown in FIGS. 5 and 6, the continuous cross section 52 of the same-layer arranged segment conductor 40a has a V shape as a whole when viewed from one side in the radial direction R. Is formed. And the crossing part one part 52a of the same layer arrangement segment conductor 40a is provided with the 1st offset bending part 93, the 1st circumferential direction bending part 71, and the one side circumferential direction extension part 54a.

  The first offset bent portion 93 is a conductor on the intermediate position side (the direction of the offset offset bent portion 92 described later) of the continuous crossing portion 52 from the first offset bent portion 93. This is a bent portion for offsetting radially outward R2 with respect to the portion on the side portion 50 side. In other words, the first offset bent portion 93 has a position of the center line of the portion on the circumferential intermediate position side of the continuous crossing portion 52 from the first offset bent portion 93, and the conductor side portion 50 from the first offset bent portion 93. It is a bending part for offsetting to the radial direction outer side R2 with respect to the position of the centerline of the side part. Here, the “center line” means a line continuously connecting the center points in the cross section perpendicular to the extending direction of the linear conductors forming the segment conductor 40 along the extending direction. In the present embodiment, the first offset bent portion 93 corresponds to the “offset bent portion” in the present invention.

  In this embodiment, the 1st offset bending part 93 is formed in the same circumferential direction C position as the conductor side part 50 connected to the circumferential direction one side C1 of the crossing part one part 52a. The first offset bent portion 93 is formed in a crank shape when viewed from one side in the circumferential direction C, and the offset width in the direction along the radial direction R is that of the linear conductor in the conductor side portion 50. It is set to a value equal to or greater than the radial R width (hereinafter simply referred to as “linear conductor width”). In this example, as shown in FIG. 7, the offset width is set to the same value as the linear conductor width. In the present specification, the “crank shape” is used as a concept including a crank shape having a gentle shape whose bending angle is not a right angle.

  The first circumferentially bent portion 71 extends from the first offset bent portion 93 toward the intermediate position in the circumferential direction of the continuous crossover portion 52 from the state in which the extending direction of the crossover one portion 52a faces the one axial side L1. This is a bent portion for bending in the other direction side C2. In the present embodiment, the first circumferential bent portion 71 is formed at the same circumferential position C as the first offset bent portion 93 and adjacent to the first offset bent portion 93 on the one axial side L1. Yes.

  The one side circumferentially extending portion 54 a is formed on the circumferential intermediate position side of the continuous crossing portion 52 with respect to the first circumferentially bent portion 71, and when viewed from one side in the radial direction R, the other circumferential side It is formed in a straight line toward the side away from the stator core 2 in the axial direction L as it goes to C2 (same as the one side L1 in the axial direction in this embodiment). In the present embodiment, as shown in FIG. 4, the circumferential direction C length of the one-side circumferential extending portion 54 a is about three times the arrangement pitch of the slots 3. Further, as shown in FIG. 7, in the present embodiment, the one side circumferentially extending portion 54 a is formed in an arc shape when viewed from one side in the axial direction L. The shape viewed from one side may be a straight line (including a broken line).

  The one side circumferentially extending portion 54a is connected to the one side C1 in the circumferential direction of the crossover one portion 52a by the first offset bent portion 93 (in this example, disposed in the first layer). The conductor side portion 50) is offset to the radially outer side R <b> 2 and is located on the radially outer side R <b> 2 with respect to the conductor side portion 50. In the present embodiment, as described above, the offset width along the radial direction R of the first offset bent portion 93 is set to the same value as the linear conductor width. Therefore, the one side circumferentially extending portion 54a is disposed on the radially outer side R2 by the width of the linear conductor with respect to the conductor side portion 50 disposed in the first layer.

  On the other hand, the crossing portion other portion 52b of the same-layer arrangement segment conductor 40a includes a second circumferential direction bent portion 72 and the other side circumferential direction extending portion 54b. The second circumferentially bent portion 72 is in a state in which the extending direction of the other portion 52b of the crossing portion faces the one side L1 in the axial direction from the boundary portion with the conductor side portion 50 toward the intermediate position in the circumferential direction of the continuous crossing portion 52. It is a bending part for bending from the circumferential direction one side C1.

  The other side circumferentially extending portion 54b is formed on the circumferential intermediate position side of the continuous crossing portion 52 with respect to the second circumferentially bent portion 72, and when viewed from one side in the radial direction R, one circumferential direction side. As it goes to C1, it is formed in a straight line toward the side away from the stator core 2 in the axial direction (same as the one side L1 in the axial direction in this embodiment). The other side circumferentially extending portion 54b is the same as the conductor side portion 50 (in this example, the conductor side portion 50 disposed in the first layer) connected to the other circumferential side C2 of the crossover portion other portion 52b. It is located in the radial direction R position. As shown in FIG. 4, the circumferential direction C length of the other circumferential extending portion 54 b is about three times the arrangement pitch of the slots 3. Further, as shown in FIG. 7, in the present embodiment, the other circumferential extending portion 54 b is formed in an arc shape when viewed from one side in the axial direction L. The shape viewed from one side may be a straight line (including a broken line).

  Further, the continuous crossing portion 52 of the same-layer arranged segment conductor 40 a includes a turning offset bending portion 92 at a circumferential intermediate position of the continuous crossing portion 52. In this example, the direction-offset bent portion 92 is formed at the center in the circumferential direction of the continuous crossing portion 52, and the one-side circumferential extending portion 54a and the other are different in both the radial direction R position and the extending direction. It is a bending part which connects the side peripheral direction extension part 54b. In the present embodiment, as shown in FIGS. 4 to 7, the turning offset bent portion 92 has a shape in which the locus of the center line of the linear conductor is spiral. In other words, the direction-offset bent portion 92 has a shape in which the shape when viewed along the circumferential direction C is an arc shape, and the shape when viewed along the radial direction R is a V-shape. . Since the deflection offset bending portion 92 is formed in this way, the surface of the linear conductor facing the one axial side L1 in the one side circumferential extension 54a is the axis in the other circumferential extension 54b. It faces the other side L2. That is, the deflection-offset bent portion 92 rotates the linear conductor 180 degrees around the extending direction while offsetting the radial position R of the linear conductor.

  By including the same-layer arrangement segment conductor 40a configured as described above, the entire one-side circumferential extending portion 54a from the first offset bent portion 93 to the turning offset bent portion 92 in the transition portion one portion 52a. The region including is offset to the radially outer side R2 by an offset width equal to or greater than the linear conductor width (in this example, equal to the linear conductor width) with respect to the other portion 52b of the transition portion. Here, the region in the transition portion one portion 52a that is arranged offset to the radially outer side R2 in this way is referred to as a first offset region 90. In the present embodiment, the entire one side circumferential extending portion 54 a is the first offset region 90. And the 1st offset area | region 90 with which the crossing part one side part 52a of the same layer arrangement | positioning segment conductor 40a which comprises each phase coil 25 is equipped with the said same layer arrangement | positioning segment conductor 40a and the conductor side part 50 has the same radial direction R position ( In this example, it is a region that is arranged in the first layer) and is offset radially outward with respect to the other portion 52b of the transition portion of the same-layer arranged segment conductor 40a constituting the phase coil 25 of the other phase. In other words, the crossover portion one portion 52a of the same-layer arrangement segment conductor 40a of each phase coil 25 is offset radially outward with respect to the crossover portion other portion 52b of the same-layer arrangement segment conductor 40a of each phase coil 25. An offset region 90 is provided. In the present embodiment, the first offset region 90 corresponds to the “offset region included in the one part of the crossing portion” in the present invention.

  As shown in FIG. 8, when viewed from any one side in the radial direction R, in the portion where the continuous transition portions 52 constituting the phase coils 25 of different phases overlap each other, the one side circumferential direction of the one continuous transition portion 52 The extending portion 54a and the other side circumferential extending portion 54b of the other continuous crossing portion 52 are disposed so as to overlap each other. That is, the same-layer arrangement segment conductor 40a constituting each phase coil 25 has a first offset region 90 that is the same as the same-layer arrangement segment conductor 40a and the conductor side portion 50 when viewed from either side in the radial direction R. It arrange | positions so that it may cross | intersect with respect to the other side circumferential direction extension part 54b of the same layer arrangement | positioning segment conductor 40a which comprises the phase coil 25 of another phase while arrange | positioning at radial position R position. In other words, the transition portion one portion 52a of the same-layer arrangement segment conductor 40a of each phase coil 25 is circumferential with respect to the transition portion other portion 52b of the same-phase arrangement segment conductor 40a in the phase coil 25 of the other phase in the first offset region 90. They are arranged overlapping in the direction C. More specifically, in the same-layer arranged segment conductors 40a of the respective phase coils 25, the first offset region 90 in the one-side circumferential extending portion 54a is of the other phase when viewed from one side in the radial direction R. It arrange | positions so that it may cross | intersect with respect to the other side circumferential direction extension part 54b of the same layer arrangement | positioning segment conductor 40a in the phase coil 25. FIG. Thereby, the cross-section one side portion 52a of the same-layer arrangement segment conductor 40a constituting each phase coil 25 is in the same radial direction R position where the same-layer arrangement segment conductor 40a and the conductor side portion 50 are in the first layer in this example. In the configuration of overlapping in the circumferential direction C with respect to the transition portion other portion 52b of the same-layer disposed segment conductor 40a constituting the phase coil 25 of the other phase, the phase coil 25 having a different shape for each phase. Without using the first layer, the conductor side portions 50 of the same-layer arrangement segment conductors 40a of the respective phases constituting the first layer coil 21 are prevented from interfering with each other between the continuous transition portions 52 of different phases. It is possible to arrange in.

  In this embodiment, since the offset width to the outside in the radial direction R of the first offset region 90 is equal to the linear conductor width, the radial direction occupied by the coil end portion of the first layer coil 21 as shown in FIG. The R range is about twice the width of the linear conductor. However, the coil of the other layer is not disposed on the radially outer side R2 of the first layer coil 21, and the second layer coil 22 and the third layer coil 23 are disposed on the radially inner side R1 with respect to the first layer coil 21. Therefore, it is possible to appropriately arrange the continuous crossing portion 52 of the first layer coil 21 without affecting the second layer coil 22 and the third layer coil 23.

  By the way, in the present embodiment, the stator core 2 is provided with the slots 3 of each phase so that the number of slots per phase per pole is “2”. Therefore, as shown in FIG. 4, the continuous crossing portions 52 of the same-phase arranged segment conductors 40a in which the conductor side portions 50 are arranged in the same layer are also arranged in the circumferential direction C in an overlapping manner. In the present embodiment, the continuous crossover portion 52 is configured as described above, thereby suppressing interference between the continuous crossover portions 52 of the same-layer arrangement segment conductors 40a of the same phase arranged in the same layer. Is also possible.

  If it explains supplementarily, as above-mentioned, the continuous crossing part 52 will be axial direction as it goes to the one side circumferential extension part 54a which goes to the axial direction one side L1 as it goes to the circumferential direction other side C2, and the circumferential direction one side C1. And the other side circumferentially extending portion 54b toward the one side L1. The entire one-side circumferential extending portion 54a is a first offset region 90. As a result, when viewed from one side in the radial direction R, the one-side circumferentially extending portion 54a of the one same-layer arranged segment conductor 40a and the other-side circumferentially extending portion of the other same-layer arranged segment conductor 40b. 54b, the same-layered segment conductors 40a of the same phase arranged in a positional relationship shifted by one slot in the circumferential direction C are used, while using the same configuration as each other. As shown in FIG. 7, the positional relationship in the axial direction L between the continuous crossing portion 52 of one of the same-layer arrangement segment conductors 40 a and the continuous crossing portion 52 of the other same-layer arrangement segment conductor 40 a is determined as the continuous crossing portion 52. It is possible to reverse the circumferential direction one side C1 and the circumferential direction other side C2 while suppressing mutual interference.

2-3. Configuration of Junction Crossing Section in First Layer Coil As shown in FIG. 6, the junction crossing section 53 of the same-layer arranged segment conductor 40a is formed in a V shape as a whole when viewed from one side in the radial direction R. Yes. And the 1st direction side extension part 51a of the same layer arrangement | positioning segment conductor 40a is the 2nd offset bending part 94, the 3rd circumferential direction bending part 73, the 4th circumferential direction bending part 74, and the 1st direction side periphery. And a direction extending portion 54c.

  The second offset bent portion 94 is for offsetting the portion closer to the joint portion 30 than the second offset bent portion 94 to the radially outer side R2 with respect to the portion closer to the conductor side portion 50 than the second offset bent portion 94. It is a bent part. In other words, the second offset bent portion 94 has a position of the center line of the portion closer to the joint portion 30 than the second offset bent portion 94, and the center line of the portion closer to the conductor side 50 than the second offset bent portion 94. It is a bending part for offsetting to the radial direction outer side R2 with respect to this position.

  In this embodiment, the 2nd offset bending part 94 is formed in the same circumferential direction C position as the conductor side part 50 of the extension origin of the 1st direction side extension part 51a. The second offset bent portion 94 is formed in a crank shape when viewed from one side in the circumferential direction C, and the offset width in the direction along the radial direction R is set to a value equal to or larger than the linear conductor width. Is done. In this example, the offset width is set to the same value as the linear conductor width. It should be noted that the front-rear relationship between the step of forming the second offset bent portion 94 at the time of manufacturing the stator 1 and the step of mounting the same-layer arrangement segment conductor 40a on the slot 3 of the stator core 2 may be any, but the same-layer arrangement In the configuration in which the segment conductor 40a is mounted along the axial direction L with respect to the slot 3 of the stator core 2, when the second offset bent portion 94 is formed first, the second segment is offset to the radially inner side R during the mounting. In this state, it is mounted in the axial direction L. In this example, as shown in FIG. 5, the first offset bent portion 93 and the conductor side portion 50 on the one circumferential side C1 of the pair of conductor side portions 50 included in the same-layer arranged segment conductor 40a Both the second offset bent portion 94 is formed.

  The third circumferentially bent portion 73 extends from the second offset bent portion 94 toward the joint portion 30 in the direction in which the extending direction of the first direction side extending portion 51a faces the other side L2 in the axial direction. It is a bent part for bending to C1. In the present embodiment, the third circumferential bent portion 73 is formed at the same circumferential position C as the second offset bent portion 94 and adjacent to the second offset bent portion 94 on the other axial side L2. Yes.

  The fourth circumferential direction bent portion 74 is a bent portion for bending the extending direction of the first direction side extending portion 51a after bending at the third circumferential direction bent portion 73 to the other circumferential side C2. Further, a joining surface 31 facing the radially inner side R1 is formed at a tip side portion of the first direction side extending portion 51a from the fourth circumferential direction bent portion 74. In the present embodiment, the fourth circumferential bent portion 74 is formed such that the extending direction of the joint 30 side portion from the fourth circumferential bent portion 74 is parallel to the axial direction L.

  A straight line between the third circumferential direction bent portion 73 and the fourth circumferential direction bent portion 74 as viewed from one side in the radial direction R toward the other side L2 in the axial direction toward the one side C1 in the circumferential direction. The 1st direction side circumferential direction extension part 54c of the shape is formed. The circumferential direction C length of the first direction side circumferentially extending portion 54 c is about three times the arrangement pitch of the slots 3. Further, in the present embodiment, the first direction side circumferentially extending portion 54c is formed in an arc shape when viewed from one side in the axial direction L, but is viewed from either side in the axial direction L. The shape may be a straight line (including a broken line).

  And the 1st direction side circumferential direction extension part 54c is arrange | positioned in the conductor side part 50 (this example arrange | positioned in a 1st layer) of the said 1st direction side extension part 51a by the 2nd offset bending part 94. The conductor side portion 50) is offset to the radially outer side R <b> 2 and is located on the radially outer side R <b> 2 with respect to the conductor side portion 50. In the present embodiment, as described above, the offset width along the radial direction R of the second offset bent portion 94 is set to the same value as the linear conductor width. Accordingly, the first direction side circumferential extending portion 54c is disposed on the radially outer side R2 by the width of the linear conductor with respect to the conductor side portion 50 disposed in the first layer.

  On the other hand, the second direction side extending portion 51b of the same layer arrangement segment conductor 40a includes a fifth circumferential direction bent portion 75, a sixth circumferential direction bent portion 76, and a second direction side circumferential extending portion 54d. ing. The fifth circumferential direction bent portion 75 extends in the extending direction of the second direction side extending portion 51b from the boundary portion with the conductor side portion 50 of the extending direction of the second direction side extending portion 51b toward the joint portion 30. Is a bent portion for bending from the state facing the other axial side L2 to the other circumferential side C2. The sixth circumferential direction bent portion 76 is a bent portion for bending the extending direction of the second direction side extending portion 51b after being bent at the fifth circumferential direction bent portion 75 to the one circumferential side C1. Further, a joining surface 31 facing the radially outer side R2 is formed on the distal end side portion of the sixth circumferential direction bending portion 76 in the second direction side extending portion 51b. In the present embodiment, the sixth circumferential direction bent portion 76 is formed such that the extending direction of the joint 30 side portion from the sixth circumferential direction bent portion 76 is parallel to the axial direction L.

  A straight line between the fifth circumferential direction bent portion 75 and the sixth circumferential direction bent portion 76 as viewed from one side in the radial direction R and toward the other side L2 in the axial direction toward the other side C2 in the circumferential direction. A second extending portion 54d in the circumferential direction in the second direction is formed. The circumferential direction C length of the circumferentially extending portion 54d in the second direction side is about three times the arrangement pitch of the slots 3. In the present embodiment, the second direction side circumferentially extending portion 54d is formed in an arc shape when viewed from either side in the axial direction L, but is viewed from either side in the axial direction L. The shape may be a straight line (including a broken line).

  As described above, the distal end side portion of the first direction side extending portion 51a which is one of the pair of extending portions 51 constituting the joining crossing portion 53 (more precisely, the joining is more than the second offset bent portion 94). The portion 30 side portion) is disposed on the radially outer side R2 by the width of the linear conductor with respect to the conductor side portion 50 disposed in the first layer. On the other hand, the second direction side extension part 51b which is the other of the pair of extension parts 51 constituting the junction crossing part 53 is the same radial R position as the conductor side part 50 arranged in the first layer. Is arranged. Then, a joint surface 31 facing the radially inner side R1 formed at the distal end portion of the first direction side extending portion 51a and a joint facing the radially outer side R2 formed at the distal end portion of the second direction side extending portion 51b. The joint portion 30 is formed by joining the surface 31. As described above, in the present embodiment, the first-direction-side extending portion 51a included in the same-layer disposed segment conductor 40a and the same-layer disposed segment conductor 40a and the conductor side portion 50 are disposed at the same radial direction R position. The respective joint surfaces 30 of the second-layer-side extending portion 51b included in the same-layer arranged segment conductor 40a constituting the phase coil 25 of the same phase are joined to face each other in the radial direction R, whereby each phase The first layer coil 21 (first wave coil 61) is formed. In other words, each joint surface of the first direction side extension part 51a of the same layer arrangement segment conductor 40a and the second direction side extension part 51b of the other same layer arrangement segment conductor 40a in the phase coil 25 of the same phase. The first layer coils 21 (first wave-wound coils 61) of the respective phases are formed by joining each other so as to face each other in the radial direction R.

  The first direction side circumferential extension portion 54c and the second direction side circumferential extension portion 54d have the same circumferential direction C length (in this example, about three times the arrangement pitch of the slots 3). It has become. Therefore, in the present embodiment, the joint portion 30 formed by joining the distal end portion of the first direction side extending portion 51 a and the distal end portion of the second direction side extending portion 51 b is the center in the circumferential direction C of the joining transition portion 53. Placed in position.

  By providing the joining transition portion 53 configured as described above, the entire first direction side circumferential extension portion 54c from the second offset bent portion 94 to the joining portion 30 in the first direction side extension portion 51a. The region including is offset to the radially outer side R2 by an offset width equal to or larger than the linear conductor width (in this example, equal to the linear conductor width) with respect to the second direction side extending portion 51b. Become. Here, the region in the first direction side extending portion 51 a that is arranged offset in the radial direction outer side R <b> 2 in this way is referred to as a second offset region 91. In the present embodiment, the entire first direction side circumferential extending portion 54 c is the second offset region 91. And the 2nd offset area | region 91 with which the 1st direction side extension part 51a of the same layer arrangement | positioning segment conductor 40a which comprises each phase coil 25 is equipped with the said same layer arrangement | positioning segment conductor 40a and the conductor side part 50 has the same radial direction R. This is a region that is disposed at a position and is offset from the second outer side extending portion 51b of the same-layer disposed segment conductor 40a constituting the phase coil 25 of the other phase, offset to the radially outer side R2. In other words, the first direction extending portion 51a of the same-layer arranged segment conductor 40a of each phase coil 25 is radial with respect to the second direction side extending portion 51b of the same-layer arranged segment conductor 40a of each phase coil 25. A second offset region 91 that is offset outward is provided. In the present embodiment, the second offset region 91 corresponds to the “offset region included in the first direction side extending portion” in the present invention.

  As shown in FIG. 8, when viewed from any one side in the radial direction R, in the portion where the joint transition portions 53 constituting the phase coils 25 of different phases overlap each other, the first direction side in one joint transition portion 53. It arrange | positions so that the circumferential direction extension part 54c and the 2nd direction side circumferential direction extension part 54d in the other joining transition part 53 may overlap. That is, the same-layer arrangement segment conductor 40a constituting each phase coil 25 has the second offset region 91 that is the same as the same-layer arrangement segment conductor 40a and the conductor side portion 50 when viewed from one side in the radial direction R. It arrange | positions so that it may cross | intersect with respect to 54 d of 2nd direction side circumferential direction extension parts of the same-layer arrangement | positioning segment conductor 40a which comprises the phase coil 25 of another phase while arrange | positioning at radial position R position. In other words, the first-direction-side extension portion 51a of the same-layer arranged segment conductor 40a of each phase coil 25 extends in the second direction of the same-layer arranged segment conductor 40a in the phase coil 25 of the other phase in the second offset region 91. It arrange | positions in the circumferential direction C with respect to the protrusion part 51b. More specifically, in the same-layer arrangement segment conductor 40a of each phase coil 25, the second offset region 91 in the first direction side circumferential extension portion 54c is viewed from either side in the radial direction R, and the other It arrange | positions so that it may cross | intersect with the 2nd direction side circumferential direction extension part 54d of the same layer arrangement | positioning segment conductor 40a in the phase coil 25 of a phase. As a result, the first-direction extending portion 51a of the same-layer arranged segment conductor 40a constituting each phase coil 25 has the same radial R position (in this example, the first radial-side R position). In the configuration arranged in the circumferential direction C with respect to the second direction side extension portion 51b of the same-layer arranged segment conductor 40a constituting the phase coil 25 of the other phase while being arranged in one layer), for each phase The conductors of the same-layer arrangement segment conductors 40a of the respective phases constituting the first layer coil 21 while suppressing the mutual joining of the crossing portions 53 of different phases without using the phase coils 25 having different shapes. The side part 50 can be disposed on the first layer.

  As described above, the joining transition part 53 formed by joining the pair of extending parts 51a and 51b is provided with the joining part 30 in place of the deflecting offset bending part 92, and the continuous transition part 52 is provided. It has almost the same configuration. Therefore, although description is omitted here, similarly to the continuous transition portion 52, the joining transition portion 53 of the first layer coil 21 is appropriately arranged without affecting the second layer coil 22 and the third layer coil 23. It is possible. Moreover, it is also possible to suppress the interference between the junction crossing portions 53 formed by the same phase arrangement segment conductors 40a of the same phase arranged in the same layer while using the same configuration as the same layer arrangement segment conductors 40a. It has become.

2-4. Second Layer Coil and Third Layer Coil Next, the configuration of the second layer coil 22 and the third layer coil 23 will be described in detail based on FIG. 9 to FIG. 11. In the present embodiment, the second layer coil 22 and the third layer coil 23 are configured integrally with a second wave winding coil 62. The second wave-wound coil 62 is a coil disposed across two layers, the second layer and the third layer. In the present embodiment, as shown in FIG. 9, a pair of second wave coils 62 and a pair of second wave coils 62 arranged in a positional relationship shifted from each other by one slot in the circumferential direction C are arranged in the circumferential direction. A set of a total of four second wave winding coils 62 including a pair of second wave winding coils 62 arranged in a positional relationship shifted by one magnetic pole pitch (for 6 slots) in C is the second layer coil 22 and the third layer. One phase coil 25 included in the coil 23 is configured. In FIG. 9, one second wave-wound coil 62 is highlighted to facilitate understanding of the configuration of the second wave-wound coil 62.

  Then, as shown in FIG. 11, four wave coils arranged in a positional relationship in which the set of the four second wave coils 62 shown in FIG. 9 is shifted by 4 slots and 8 slots on one circumferential side C1. Each of the 62 sets constitutes another two-phase phase coil 25 included in the second layer coil 22 and the third layer coil 23. In addition, since each of the 2nd wave winding coil 62 which comprises the 2nd layer coil 22 and the 3rd layer coil 23 has the mutually similar structure although the circumferential direction C position with respect to the stator core 2 differs, in the following, Except where necessary, these will be described without distinction.

  As shown in FIG. 9, the second wave winding coil 62 has a plurality of (per one turn in this example) arranged at intervals corresponding to two magnetic pole pitches along the circumferential direction C, like the first wave coil 61. This is a coil formed in a wave shape using four) segment conductors 40, and the overall configuration is the same as that of the first wave coil 61. The major difference between the second wave-wound coil 62 and the first wave-wound coil 61 is that the second wave-wound coil 62 is configured using the adjacent layer-arranged segment conductor 40b instead of the same-layer-arranged segment conductor 40a. is there. Hereinafter, this difference will be described in detail, but the points not particularly described are the same as those of the first wave coil 61.

  As described above, the second wave-wound coil 62 is configured using the adjacent layer arrangement segment conductor 40b. The adjacent layer-arranged segment conductors 40b are segment conductors 40 that are disposed so that the pair of conductor side portions 50 are adjacent to each other in different slots 3, and in the present embodiment, a pair of adjacent layer-arranged segment conductors 40b. The conductor side portion 50 is disposed in a layer (in this example, the second layer and the third layer) other than the radially outermost layer in each slot 3. Specifically, as shown in FIGS. 9 and 10, the pair of conductor side portions 50 provided in the adjacent layer arrangement segment conductor 40b is arranged such that the conductor side portion 50 on the one side C1 in the circumferential direction is arranged in the second layer. The conductor side portion 50 on the other side C2 in the direction is arranged in the third layer. Further, the pair of conductor side portions 50 included in the adjacent layer arrangement segment conductor 40 b are respectively disposed in the pair of slots 3 that are separated from each other in the circumferential direction C by a distance corresponding to six times the arrangement pitch of the slots 3.

  The continuous crossing part 52 of the adjacent layer arrangement segment conductor 40b will be described. As shown in FIG. 9, the crossover portion one portion 52 a of the adjacent layer arrangement segment conductor 40 b includes a first circumferential direction bent portion 71 and a one side circumferential direction extending portion 54 a. Further, the crossing portion other portion 52b of the adjacent layer arrangement segment conductor 40b includes a second circumferential direction bent portion 72 and the other side circumferential direction extending portion 54b. Since the pair of conductor side portions 50 of the adjacent layer arrangement segment conductor 40b are arranged so as to be adjacent to each other in different slots 3, the adjacent layer arrangement segment conductor 40b is also shown in FIG. The crossover portion one portion 52a is positioned on the radially outer side R2 by the linear conductor width with respect to the crossover portion other portion 52b of the adjacent layer arrangement segment conductor 40b. Therefore, even if the first offset bent portion 93 is not provided as in the same-layer arranged segment conductor 40a, the phase coils 25 having different phases are configured as viewed from one side in the radial direction R as shown in FIG. In the portion where the continuous crossover portions 52 overlap each other, the one side circumferential extending portion 54a of one continuous crossing portion 52 and the other side circumferential extending portion 54b of the other continuous crossing portion 52 overlap each other. However, the conductor side portions 50 of the adjacent layer-arranged segment conductors 40b of the respective phases constituting the second layer coil 22 and the third layer coil 23 are suppressed while preventing the continuous cross-over portions 52 of different phases from interfering with each other. Can be arranged in the second layer and the third layer. As shown in FIG. 1, in this embodiment, the deflection offset bending portion 92 included in the second layer coil 22 and the third layer coil 23 is more than the deflection offset bending portion 92 included in the first layer coil 21. It is located on the other axial side L2.

  Next, the junction crossing 53 of the adjacent layer arrangement segment conductor 40b will be described. As shown in FIG. 9, the first layer side extending portion 51 a of the adjacent layer arrangement segment conductor 40 b includes a third circumferential direction bent portion 73, a fourth circumferential direction bent portion 74, and a first direction side circumferential direction extension. Part 54c. Further, the second direction side extending portion 51b of the adjacent layer arrangement segment conductor 40b includes a fifth circumferential direction bending portion 75, a sixth circumferential direction bending portion 76, and a second direction side circumferential direction extending portion 54d. I have. Since the pair of conductor side portions 50 of the adjacent layer arrangement segment conductor 40b are arranged so as to be adjacent to each other in different slots 3, the first direction side extending portion of the adjacent layer arrangement segment conductor 40b is provided. 54c is located on the radially outer side R2 by the width of the linear conductor with respect to the second direction extending portion 54d of the adjacent layer arrangement segment conductor 40b. Therefore, even if the second offset bent portion 94 is not provided as in the case of the same layer arrangement segment conductor 40a, the phase coils 25 having different phases are configured as viewed from one side in the radial direction R as shown in FIG. In the part where the joining transition parts 53 overlap, the first direction side circumferential extension part 54c in one joining transition part 53 and the second direction side circumferential extension part 54d in the other joining transition part 53 overlap. Of the adjacent layer-arranged segment conductors 40b of the respective phases constituting the second layer coil 22 and the third layer coil 23, while suppressing the interference between the joint transition portions 53 of different phases. It is possible to arrange the conductor side portions 50 in the second layer and the third layer. In addition, as shown in FIG. 1, in this embodiment, the junction part 30 with which the 2nd layer coil 22 and the 3rd layer coil 23 are provided is located in the same axial direction L position as the junction part 30 with which the 1st layer coil 21 is provided. is doing.

3. Other Embodiments (1) In the above embodiment, the phase coils 25 of each phase constituting the first layer coil 21 are arranged with respect to the stator core 2 in the circumferential direction C positional relationship as shown in FIG. Was described as an example. However, the embodiment of the present invention is not limited to this. For example, a preferred embodiment of the present invention may be configured such that the phase coils 25 of the respective phases constituting the first layer coil 21 are arranged with respect to the stator core 2 in the circumferential direction C positional relationship as shown in FIG. one of. In the example shown in FIG. 12, the pair of the first wave winding coils 61 shown in FIG. 6 (hereinafter simply referred to as “the wave winding coil set” in this paragraph) and the wave winding coil set on one side in the circumferential direction. A pair of first wave winding coils 61 arranged in a positional relationship shifted by two slots in C1 and a pair of first wave winding coils arranged in a positional relationship by shifting the wave winding coil set by four slots on one circumferential side. The set of one-wave winding coils 61 constitutes the phase coil 25 of each phase included in the first layer coil 21. As is apparent from a comparison of FIG. 12 with FIG. 4, in this configuration, the other circumferential extension portion 54 b intersects with one one circumferential extension portion 54 a when viewed from one radial side. Although there is a portion where the number increases, since the entire one-side circumferential extending portion 54a is the first offset region 90, a configuration as shown in FIG. 12 can be adopted.

(2) In the above-described embodiment, the case where the deflection offset bending portion 92 has a shape in which the locus of the center line of the linear conductor is spiral has been described as an example. However, the embodiment of the present invention is not limited to this, and, for example, the direction-offset bent portion 92 can be formed as shown in FIGS. 13 and 14. Such a deflection offset bending portion 92 can be formed by, for example, press working. Unlike the above-described embodiment, the surface of the linear conductor facing the one side L1 in the axial direction in the one side circumferential extension portion 54a is The other side circumferentially extending portion 54b also faces the one axial side L1.

(3) In said embodiment, the case where the 1st offset bending part 93 is formed in the same circumferential direction C position as the conductor side part 50 connected to the circumferential direction one side C1 of the crossing part one part 52a. Described as an example. However, the embodiment of the present invention is not limited to this, and the first offset bent portion 93 may be formed in the one side circumferential extending portion 54a included in the crossing portion one portion 52a. . In such a configuration, unlike the above-described embodiment, a part of the one side circumferentially extending portion 54a (the portion from the first offset bent portion 93 to the turning offset bent portion 92) is the first offset region. 90. In the above embodiment, the case where the offset width of the first offset bent portion 93 is set to the same value as the linear conductor width has been described as an example. However, the offset width of the first offset bent portion 93 is It can be set to an arbitrary value equal to or larger than the width of the linear conductor, and can be set to a value that is 1.5 times or twice the linear conductor width, for example. Further, the offset width of the first offset bent portion 93 is determined according to a necessary insulating distance, or when an insulating sheet is mounted, the offset width of the first offset bent portion 93 is determined according to the radial direction R width of the insulating sheet. Can do. For example, the offset width of the first offset bent portion 93 can be set to the sum of the linear conductor width and the radial direction R width of the insulating sheet.

(4) In the embodiment described above, the second offset bent portion 94 is described as an example in which the second offset bent portion 94 is formed at the same circumferential direction C position as the conductor side portion 50 that is the extension source of the first direction side extension portion 51a. did. However, the embodiment of the present invention is not limited to this, and the second offset bent portion 94 is formed in the first direction side circumferential extension portion 54c included in the first direction side extension portion 51a. It is also possible. In such a configuration, unlike the above-described embodiment, a part of the first direction side circumferential extending portion 54c (the portion from the second offset bent portion 94 to the joint portion 30) is the second offset region 91. It becomes. In the above-described embodiment, the case where the offset width of the second offset bent portion 94 is set to the same value as the linear conductor width has been described as an example. It can be set to an arbitrary value equal to or larger than the width of the linear conductor, and can be set to a value that is 1.5 times or twice the linear conductor width, for example. Further, the offset width of the second offset bent portion 94 is determined according to a necessary insulating distance, or when an insulating sheet is mounted, the offset width of the second offset bent portion 94 is determined according to the radial direction R width of the insulating sheet. Can do. For example, the offset width of the second offset bent portion 94 can be set to the sum of the linear conductor width and the radial direction R width of the insulating sheet.

(5) In the above embodiment, the case where the coil 20 has a three-layer winding structure in which three conductor side portions 50 are arranged in the radial direction R in each slot 3 has been described as an example. However, the embodiment of the present invention is not limited to this, and the coil 20 is arranged in an odd number (for example, one, five, seven, etc.) of the conductor side portions 50 other than three in each slot 3. An odd-numbered layer winding structure (for example, a one-layer winding structure, a five-layer winding structure, a seven-layer winding structure, etc.) can also be used. Further, when the coil 20 has an odd-numbered layer winding structure, a layer coil of only one layer (for example, only the first layer) is configured using the same layer arrangement segment 40a, and the layers of all other layers The coil may be configured using a segment conductor 40 other than the same layer arranged segment conductor 40a such as the adjacent layer arranged segment conductor 40b, or the layer coils of all layers may be constituted using the same layer arranged segment conductor 40a. You can also When the layer coils of all layers are configured using the same-layer arranged segment conductor 40a, for example, at least the same-layer arranged segment conductor 40a arranged in a layer other than the layer on the most radial direction field side, While maintaining the state where the transition part one portion 52a is offset to the radial demagnetization side with respect to the transition part other portion 52b, the entire continuous transition part 52 is arranged on the radial demagnetization side with respect to the conductor side part 50. By being offset to the continuous transition portion 52 of the same-layer arranged segment conductors 40a arranged in each layer, it is possible to appropriately arrange them.

(6) In the above embodiment, the coil 20 has been described as an example of an odd layer winding structure in which the odd number of conductor side portions 50 are arranged in the radial direction R in each slot 3. Of course, it is also possible to configure an even layer winding structure in which an even number of conductor side portions 50 are arranged in the radial direction R in each slot 3. In such a configuration, the layer coils of all layers may be configured by using the same layer arrangement segment conductor 40a, or some layers (for example, only the first layer, only the first layer and the second layer) ) May be constituted by the same layer arrangement segment conductor 40a, and the remaining layer coil may be constituted by using a segment conductor 40 other than the same layer arrangement segment conductor 40a such as the adjacent layer arrangement segment conductor 40b. .

(7) In the embodiment described above, the one side circumferentially extending portion 54a is formed in a straight line shape toward the one side L1 in the axial direction as viewed from one side in the radial direction R toward the other side C2 in the circumferential direction. As an example, the other side circumferentially extending portion 54b is formed in a straight line shape toward the one side L1 in the axial direction as viewed from one side in the radial direction R toward the one side C1 in the circumferential direction. explained. However, the embodiment of the present invention is not limited to this, and the one-side circumferential extending portion 54a and the other-side circumferential extending portion 54b are viewed from either side in the radial direction R in the circumferential direction. It can also be formed in a straight line along C.

(8) In the above-described embodiment, the circumferential direction of the continuous crossover portion 52 that defines the boundary between the crossover portion one portion 52a and the crossover portion other portion 52b in the continuous crossover portion 52 and is also the formation position of the deflection offset bending portion 92. The case where the intermediate position is the center position in the circumferential direction of the continuous crossing portion 52 has been described as an example. However, the embodiment of the present invention is not limited to this, and the circumferential intermediate position is set to the circumferential one side C1 or the circumferential other side C2 with respect to the circumferential central position of the continuous crossing portion 52. It is also possible. In such a configuration, the deflecting offset bent portion 92 is formed at a circumferential intermediate position other than the circumferential central position of the continuous crossing portion 52, and the one side circumferential extending portion 54a and the other side circumferential extending portion 54b. And the circumferential direction C lengths are different from each other.

(9) In the above embodiment, the case where the joint portion 30 is disposed at the center position in the circumferential direction C of the joint transition portion 53 has been described as an example. However, the embodiment of the present invention is not limited to this, and the joining portion 30 may be arranged at a circumferential direction C position other than the circumferential position C central position at the joining transition portion 53. In such a configuration, the first direction side circumferential extending portion 54c and the second direction side circumferential extending portion 54d have different circumferential C lengths.

(10) In the above embodiment, as an example, the joining surfaces 31 of the first direction extending portion 51a and the second direction extending portion 51b are joined to face each other in the radial direction R. Although demonstrated, each joining surface 31 of the 1st direction side extension part 51a and the 2nd direction side extension part 51b can also be set as the structure joined mutually facing the circumferential direction C mutually.

(11) In the above embodiment, the case where the circumferential first direction side coincides with the other circumferential side C2 and the circumferential second direction side coincides with the circumferential one side C1 has been described as an example. However, the embodiment of the present invention is not limited to this, and the configuration is such that the circumferential first direction side coincides with the circumferential one side C1, and the circumferential second direction side coincides with the circumferential other side C2. Is also one preferred embodiment of the present invention. In this configuration, unlike the above-described embodiment, the first offset bent portion 93 is formed on the conductor side portion 50 on one side C1 in the circumferential direction of the pair of conductor side portions 50 included in the same-layer arranged segment conductor 40a. A second offset bent portion 94 is formed on the conductor side portion 50 on the other circumferential side C2.

(12) In the above embodiment, the case where the coils of the layers other than the first layer (second layer and third layer) are also wave wound coils has been described as an example. However, the embodiment of the present invention is not limited to this, and the coils of the layers other than the first layer may be a lap coil or a concentric coil. In addition, the coils of the layers other than the first layer can be configured by using the segment conductors 40 in which the pair of conductor side portions 50 are respectively disposed in different layers in different slots 3.

(13) In the above-described embodiment, the case where the cross-sectional shape of the linear conductor constituting the segment conductor 40 in the cross section orthogonal to the extending direction is rectangular has been described as an example. However, the embodiment of the present invention is not limited to this, and linear conductors such as a circular shape, an elliptical shape, a square shape, and a polygonal shape can be used as the cross-sectional shape.

(14) In the above embodiment, the case where the stator 1 is a stator of an inner rotor type rotating electrical machine in which a rotor as a field is disposed on the radially inner side R1 has been described as an example. However, the embodiment of the present invention is not limited to this, and the stator 1 may be configured as a stator of an outer rotor type rotating electrical machine in which a rotor as a field is disposed on the radially outer side R2. It is one of the preferred embodiments of the invention. In such a configuration, the radially inner side R1 and the radially outer side R2 are respectively the “radial counter field side” and the “radial field side” in the present invention.

(15) In the above embodiment, as shown in FIG. 1, the circumferential one side C1 coincides with the clockwise direction when the stator 1 (stator core 2) is viewed from the axial one side L1, and the circumferential direction Although the case where the other side C2 coincides with the counterclockwise direction side when the stator 1 (stator core 2) is viewed from the one axial side L1 has been described as an example, the circumferential one side C1 and the circumferential other side C2 It is of course possible to reverse the above.

  The present invention comprises an armature core in which a plurality of slots extending in the axial direction of a cylindrical core reference surface are distributed in the circumferential direction of the core reference surface, and a coil wound around the armature core, It can be suitably used for an armature for a rotating electrical machine that is disposed so as to face the field in the radial direction of the core reference surface and constitutes the rotating electrical machine together with the field.

1: Stator (armature for rotating electrical machine)
2: Stator core (armature core)
3: Slot 3a: Slot bottom surface 20: Coil 25: Phase coil 31: Joining surface 40: Segment conductor 40a: Same layer arrangement segment conductor 40b: Adjacent layer arrangement segment conductor 50: Conductor side portion 51: Extension portion 51a: First Direction side extending portion 51b: Second direction side extending portion 52: Continuous crossing portion 52a: Crossing portion one portion 52b: Crossing portion other portion 53: Joining crossing portion 54a: One side circumferential extending portion 54b: Other side periphery Direction extension portion 54c: First direction side circumferential extension portion 54d: Second direction side circumferential extension portion 61: First wave winding coil (wave winding coil portion)
90: First offset area (offset area)
91: Second offset area (offset area)
92: turning offset bending portion 93: first offset bending portion (offset bending portion)
L: axial direction C: circumferential direction C1: circumferential one side (circumferential second direction side)
C2: the other side in the circumferential direction (the first direction side in the circumferential direction)
R: radial direction R1: radial inner side (radial field side)
R2: radially outer side (radially opposite field side)

Claims (5)

An armature core in which a plurality of slots extending in the axial direction of a cylindrical core reference surface are dispersedly arranged in the circumferential direction of the core reference surface; and a coil wound around the armature core. An armature for a rotating electrical machine that is disposed opposite to the radial direction of the core reference surface and constitutes a rotating electrical machine together with the field,
The coil includes a plurality of phase coils of different phases, and each phase coil is configured by joining a plurality of segment conductors,
The segment conductors include a pair of conductor side portions respectively disposed in the different slots, a continuous crossing portion connecting one end of the pair of conductor side portions on the outer side in the axial direction of the armature core, and the pair A pair of extending portions extending from the other end of each of the conductor side portions to the outside in the axial direction of the armature core, and a continuous conductor,
The field side in the radial direction of the core reference surface is a radial field side, and the opposite side to the field is a radial demagnetizing side, and the slot is a wall surface on the radial demagnetizing side. Having a slot bottom that is
More than the circumferential intermediate position of each of the segment conductors in the circumferential direction, the circumferential direction one side part is a bridging part one part, the circumferential direction other side part is the bridging part other part,
The segment conductors arranged at the same radial position in the slots in which the pair of conductor side parts are different from each other are defined as the same layer arranged segment conductors,
The same-layer arrangement segment conductor, the conductor side portion is arranged adjacent to the bottom surface of the slot,
An offset region in which the crossing portion one portion of the same-layer arranged segment conductor of each phase coil is offset to the radial demagnetizing side with respect to the other portion of the cross-layer arranged segment conductor of each phase coil And an overlapping armature for the rotating electrical machine disposed in the circumferential direction with respect to the other portion of the crossover segment conductor of the same-layer arranged segment conductor in the phase coil of the other phase in the offset region. The coil has an m-layer winding structure in which m conductor sides are arranged in the radial direction (m: an odd number of 3 or more) in each slot,
The segment conductors arranged so that the pair of conductor side parts are adjacent to each other in the different slots are adjacent layer arranged segment conductors,
The conductor side portion of the same-layer arranged segment conductor is arranged on the most radially opposite field side layer in each slot, and the conductor side portion of the adjacent layer arranged segment conductor is arranged on the other layers. The armature for rotary electric machines according to claim 1, which is arranged. The one part of the crossing portion of the same-layer arranged segment conductor extends in the circumferential direction on one side toward the side away from the armature core in the axial direction as viewed from one side in the radial direction toward the other side in the circumferential direction. Equipped with
The other part of the crossing portion of the same layer-arranged segment conductor extends in the circumferential direction on the other side toward the side away from the armature core in the axial direction as viewed from one side in the radial direction. Equipped with
At least a part of the one-side circumferential extending portion is the offset region,
The same-layer arrangement segment conductor of each phase coil is the same-layer arrangement segment in the phase coil of the other phase when the offset region in the one-side circumferential extension portion is viewed from one side in the radial direction. The armature for rotary electric machines according to claim 1, wherein the armature is disposed so as to intersect with the other side circumferentially extending portion of the conductor. The one part of the crossing portion of the same-layer arranged segment conductor is at the same circumferential position as the conductor side connected to one side in the circumferential direction, and the one side circumferentially extending portion is set to the conductor side. An offset bend that offsets to the radial direction field side,
The continuous crossing portion of the segment conductors having the same layer is arranged at a circumferential intermediate position of the continuous crossing portion, the one-side circumferential extending portion and the other-side circumferential direction having different radial positions and extending directions. The armature for a rotating electrical machine according to claim 3, further comprising a deflection offset bending portion that connects the extending portion. Each of the phase coils has a joining bridge portion formed by joining the extending portions extending from the conductor side portions arranged in the different slots, respectively, on the outer side in the axial direction of the armature core,
Of the pair of extending portions constituting the joining crossing portion, the one located on the circumferential first direction side is the first direction extending portion, the circumferential direction first opposite to the circumferential first direction side. The one located on the two direction side is the second direction side extension,
The first direction side extension portion of the same-layer arrangement segment conductor of each phase coil is radially opposite to the second direction side extension portion of the same-layer arrangement segment conductor of each phase coil. An offset region that is offset to the side, and is disposed in the offset region overlapping in the circumferential direction with respect to the second direction side extension portion of the same-layer arranged segment conductor in the phase coil of the other phase,
The joint surfaces of the first-direction extending portion of the same-layer arranged segment conductor and the second-direction extending portion of the other same-layer arranged segment conductor in the phase coil of the same phase are mutually connected. The armature for a rotating electrical machine according to any one of claims 1 to 4, wherein a corrugated coil portion of each phase is formed by being opposed to each other in the radial direction.

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