JP6512060B2 - Rotor of electric rotating machine - Google Patents

Description

  The present invention relates to a rotor of a rotating electrical machine.

  Patent Document 1 and the like disclose a permanent magnet embedded type rotary electric machine. Specifically, in the electric motor of Patent Document 1, as shown in FIG. 7, the rotor core is formed by laminating the electromagnetic steel plates 200, and in order to fix the electromagnetic steel plates 200, the rotor shaft 201 is inserted through the central portion. The connection fitting portion 202 is provided in the steel plate and is configured to be sandwiched by the pressing plate.

JP, 2009-225584, A

  By the way, when electromagnetic steel plates are laminated to form a rotor core, if the electromagnetic steel plates are fixed by caulking, distortion is applied to the electromagnetic steel plates at the caulking portion, which may cause a torque decrease and the like. For example, when the caulking portion is positioned in the q-axis magnetic path in the rotor core, the magnetic performance is deteriorated to increase the q-axis inductance, which causes a decrease in reluctance torque.

  An object of the present invention is to provide a rotor of a rotating electrical machine capable of forming a rotor core without reducing a salient pole ratio.

In the first aspect of the present invention, the rotor core of the rotating electric machine is disposed such that the outer peripheral surface of the cylindrical rotor core is opposed to the inner peripheral side of the stator wound with the coil via a gap. Electromagnetic steel sheets are stacked, the electromagnetic steel sheets are joined by a caulking portion, the caulking portion is disposed outside the q-axis magnetic path, and the outer surface of the rotor core is directed to the outer surface A gutter is formed so as to leave a protruding portion extending in a vertical direction, and the crimped portion is formed on the protruding portion .

  According to the first aspect of the present invention, the caulking portion for joining the magnetic steel plates to each other is disposed outside the q-axis magnetic path, so that the rotor core is not reduced in the rotating electrical machine using reluctance torque without reducing salient pole ratio. It can be formed.

As described in claim 2 , in the rotor of the rotating electrical machine according to claim 1 , a caulking portion is formed on a protrusion protruding into a flux barrier formed at the q-axis side end of the permanent magnet embedded in the rotor core. It is good to be done.

As described in claim 3 , in the rotor of the rotating electrical machine according to claim 2 , the projection may be a positioning projection of the permanent magnet.
In the invention according to claim 4, the rotor core of the rotating electrical machine is disposed such that the outer peripheral surface of the cylindrical rotor core is opposed to the inner peripheral side of the stator on which the coil is wound via a gap. Electromagnetic steel plates are stacked, the electromagnetic steel plates are joined by a caulking portion, and the caulking portion is disposed outside the q-axis magnetic path, and the q-axis side end of the permanent magnet embedded in the rotor core It is a gist that a caulking portion is formed on a protrusion protruding into the flux barrier formed in the portion, and the protrusion is formed at a position separated from the permanent magnet.
According to a fifth aspect of the present invention, in the rotor of the rotating electrical machine according to the second aspect , the projection may be formed at a position separated from the permanent magnet.

According to a sixth aspect of the present invention, in the rotor of the rotating electrical machine according to any one of the second to fifth aspects, the projection on which the caulking portion is formed is outside the inner wall surface of the inner wall of the flux barrier. It is preferable to project toward the radial side wall surface.

  As described in claim 7, in the rotor of the rotating electrical machine according to any one of claims 1 to 6, the rotor core has a flux barrier extending along a q-axis magnetic path, and the flux barrier is Of the inner wall, the inner diameter side wall surface may be formed so as to spread to the adjacent magnetic pole side from the position along the q-axis magnetic path.

  According to the present invention, the rotor core can be formed without reducing the salient pole ratio.

The schematic diagram of the rotary electric machine in embodiment. (A) is a partial expansion schematic diagram of the rotary electric machine in embodiment, (b) is a cross-sectional schematic diagram in the AA line of (a). The partial expansion schematic diagram of the rotary electric machine showing the d-axis magnetic flux in embodiment. The partial expansion schematic diagram of the rotary electric machine showing the q-axis magnetic flux in embodiment. (A) is a partial expansion schematic diagram of the rotary electric machine in another example, (b) is a cross-sectional schematic diagram in the BB line of (a). (A) is a partial enlarged schematic view of the rotary electric machine in another example, (b) is a cross-sectional schematic view taken along the line C-C of (a), and (c) is a partial enlarged schematic view of the rotary electric machine in another different example. The figure for demonstrating background art.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
As shown in FIG. 1, the rotary electric machine 10 is a magnet embedded rotary electric machine, and includes a rotor (rotor) 20 and a stator (stator) 100. The stator 100 is disposed on the outer peripheral side of the cylindrical rotor 20. The inner circumferential surface of the stator 100 is opposed to the outer circumferential surface of the rotor 20 via the gap G (see FIG. 2A). In addition, all the figures are schematic diagrams and the shape is emphasized and described. The number of poles of the rotary electric machine 10 is “4”.

  As shown in FIGS. 1 and 2A, in the stator 100, the stator core 101 has a cylindrical shape, and a plurality of (36) slots 102 are formed in the circumferential direction inside the stator core 101. Each slot 102 is open at the inner circumferential surface. Teeth 103 are formed between the slots 102. In the stator 100, the number of slots per pole is “9” (the number of teeth per pole is “9”), and the angle θr from the center O per pole is 90 °. A coil (winding) 104 to which a three-phase alternating current is applied is wound around the teeth 103 provided at equal intervals. As described above, in the stator 100, the teeth 103 in which the coil 104 is wound on the inner circumferential side are arranged in parallel in the circumferential direction, and the coil 104 is wound.

  A rotor 20 is disposed inside the stator 100. The rotor 20 includes a cylindrical rotor core 30 in which a plurality of (for example, several tens of) substantially disc-shaped electromagnetic steel plates are stacked. 50 are pierced. The rotor 20 is rotatably supported by a bearing of a housing (not shown) via a shaft 50 with the outer peripheral surface of the rotor core 30 at a predetermined distance from the teeth 103. As described above, the rotor 20 is disposed such that the outer peripheral surface of the rotor core 30 is opposed to the inner peripheral side of the stator 100 via the gap G.

  A plurality of permanent magnets 40 and 41 are embedded in the rotor core 30 in the radial direction with the flux barriers 33, 34, 35 and 36 arranged at the q-axis side end. Specifically, arc-shaped permanent magnet insertion holes 31 and 32 are formed in the rotor core 30. The permanent magnet insertion holes 31 and 32 extend in the axial direction. The permanent magnet insertion hole 31 is positioned on the inner diameter side and the permanent magnet insertion hole 32 is positioned on the outer diameter side. An arc-shaped permanent magnet 40 is inserted into the arc-shaped permanent magnet insertion hole 31. The permanent magnet 40 is located on the d-axis, and the permanent magnet 40 is magnetized in the thickness direction. An arc-shaped permanent magnet 41 is inserted into the arc-shaped permanent magnet insertion hole 32. The permanent magnet 41 is located on the d-axis, and the permanent magnet 41 is magnetized in the thickness direction.

  As shown in FIG. 1, the permanent magnets 40 and the permanent magnets 41 arranged in adjacent regions (one pole) are arranged such that the outer peripheral side of the rotor 20 has different poles. For example, when one permanent magnet 40 is disposed such that the teeth 103 side is the S pole, the permanent magnets 40 disposed in the adjacent region (one pole) are disposed such that the teeth 103 side is the N pole. .

  The rotor core 30 has arc-shaped flux barriers (holes) 33 and 34 extending continuously with the end of the permanent magnet insertion hole 31 on the q axis side. Similarly, the rotor core 30 has arc-shaped flux barriers (holes) 35 and 36 that extend continuously with the end of the permanent magnet insertion hole 32 on the q-axis side. The flux barriers 33, 34, 35, 36 extend in the axial direction.

  FIG. 3 shows a visualized d-axis magnetic flux. FIG. 4 shows a visualization of the q-axis magnetic flux. 3 and 4 show the magnetic flux when the permanent magnet insertion holes 31 and 32, the flux barriers 33 to 36 and the permanent magnets 40 and 41 are not provided, but for reference, the permanent magnet insertion holes 31 and 32 and the flux barrier 33 .About.36 and the permanent magnets 40, 41 are indicated by alternate long and short dashed lines.

  As shown in FIG. 2A, the flux barriers 33 and 34 extend along the q-axis magnetic flux (see FIG. 4). The flux barriers 35 and 36 extend along the q-axis magnetic flux (see FIG. 4). The flux barriers 33 and 34 are located on the inner diameter side, and the flux barriers 35 and 36 are located on the outer diameter side, and the rotor core 30 has a plurality of layers of flux barriers formed in the radial direction.

  The flux barrier 33 has an inner diameter side wall surface 33a and an outer diameter side wall surface 33b as an inner wall. The outer diameter side wall surface 33b of the flux barrier 33 has an arc shape. The flux barrier 34 has an inner diameter side wall surface 34a and an outer diameter side wall surface 34b as an inner wall. The outer diameter side wall surface 34b of the flux barrier 34 has an arc shape.

  The flux barrier 35 has an inner diameter side wall surface 35a and an outer diameter side wall surface 35b as an inner wall. The outer diameter side wall surface 35b of the flux barrier 35 has an arc shape, and the inner diameter side wall surface 35a of the flux barrier 35 extends linearly. The flux barrier 36 has an inner diameter side wall surface 36a and an outer diameter side wall surface 36b as an inner wall. The outer diameter side wall surface 36b of the flux barrier 36 has an arc shape, and the inner diameter side wall surface 36a of the flux barrier 36 extends linearly.

  The arc-shaped permanent magnet insertion hole 31 and the center O1 of the arc of the flux barriers 33 and 34 are on the outer diameter side of the outer peripheral surface of the rotor core 30. An arc-shaped permanent magnet insertion hole 32 and an arc center O 2 of the flux barriers 35 and 36 are on the outer diameter side of the outer peripheral surface of the rotor core 30. The center O1 of the arc and the center O2 of the arc are on the d-axis.

  The flux barriers 33 and 34 of the radially innermost layer of the plurality of flux barriers 33, 34 and 35 and 36 formed in the radial direction have inner sidewall surfaces 33a and 34a of the inner walls along the q-axis magnetic flux It is formed to spread to the adjacent magnetic pole side from the position. More specifically, the inner diameter side wall surfaces 33a and 34a of the flux barriers 33 and 34 are parallel to the magnetic pole boundary Bm.

  As shown in FIG. 2A, a notch (recess) 37 is formed on the outer surface of the rotor core 30 so as to leave a protrusion 38 extending toward the outer surface. The notch 37 extends in the axial direction on the d-axis. One notch 37 is formed per pole, and provided symmetrically about the d-axis. The notch 37 is formed outside the q-axis magnetic path as shown in FIG. Further, the notch 37 has an arc shape, and a protrusion 38 is formed at a central portion thereof as shown in FIG. 2A, and a caulking portion 39 is formed on the protrusion 38. In the caulking portion 39, the electromagnetic steel plates 60 configured by laminating the rotor core 30 are coupled to each other. The caulking portion 39 is disposed outside the q-axis magnetic path.

  As shown in FIG. 2 (b), the caulking portion 39 forms square projections 61 on each of the electromagnetic steel plates 60, superposes the respective electromagnetic steel plates 60 on each other, and pressurizes them. It is fixed by. Further, in the caulking portion 39, the magnetic steel sheet 60 is strained to deteriorate the magnetic performance. The crimped portion 39 has a quadrangle in a plan view of the electromagnetic steel sheet 60 of FIG.

Next, the operation of the rotary electric machine 10 configured as described above will be described.
When the rotating electrical machine is driven, a three-phase current is supplied to the coil 104 of the stator 100 to generate a rotating magnetic field in the stator 100, and the rotating magnetic field acts on the rotor 20. Then, the rotor 20 is rotated in synchronization with the rotating magnetic field by the magnetic attraction and repulsion between the rotating magnetic field and the permanent magnets 40 and 41.

  In the rotor structure in the present embodiment, a notch (large groove) 37 is provided on the outer surface, and the electromagnetic steel plate 60 is fixed by the caulking portion 39 using the notch (space). By providing the notch 37 which is a sufficiently large outer peripheral groove on the outer periphery of the rotor core 30, the caulking portion 39 does not protrude to the outer periphery. Therefore, no problem occurs in the clearance (gap G) between the rotor 20 and the stator 100.

  That is, when substantially the entire rotor core 30 is used as a magnetic path as in the rotor 20 of the present embodiment, performance (torque etc.) is significantly reduced if a crimped portion as in Patent Document 1 is provided. In addition, it is difficult to obtain sufficient bonding strength by caulking on the inner diameter side which is not used as a magnetic path (at a portion where the magnetic flux density is low).

  In the present embodiment, the notch 37 is provided on the outer surface of the rotor core 30 and the caulking portion 39 is provided on the notch 37. That is, the electromagnetic steel plate 60 is fixed without arranging the caulking portion 39 for fixing the electromagnetic steel plate 60 in the magnetic path of the rotor core 30 (without reducing the torque). By doing this, the electromagnetic steel plate 60 can be fixed without disturbing the q-axis magnetic path of the rotor 20 and without reducing the q-axis inductance Lq, that is, without reducing the salient pole ratio (Lq / Ld). Further, since the outer periphery side of the rotor core 30 is fixed, it is possible to obtain a higher bonding strength than the inner diameter side fixing of the rotor core 30. As a result, inconveniences such as the opening of the electromagnetic steel sheet 60 on the outer peripheral surface of the rotor core 30 are less likely to occur.

In addition, since the crimped portion 39 degrades the electromagnetic steel plate 60, the crimped portion 39 is unlikely to be a magnetic path, and the leakage flux is unlikely to occur.
Although the shape of the caulking portion 39 is a square, the shape of the caulking portion 39 may be a round shape. In short, the shape is not limited as long as the clearance (gap G) between the rotor 20 and the stator 100 is not affected.

  Further, as shown in FIG. 2A, in the inner wall surface 33a, 34a of the inner wall surface 33a, 34a of the flux barriers 33, 34 excluding the permanent magnet insertion hole, a shape is adopted to narrow the width of the magnetic path to a width that does not saturate the magnetic flux density. By widening the width of the flux barrier in the d-axis magnetic path, the d-axis magnetic flux can be effectively blocked as shown in FIG. As a result, the d-axis inductance Ld is reduced, and the salient pole ratio (Lq / Ld) can be increased. In this manner, the salient pole ratio (Lq / Ld) is increased by reducing the d-axis inductance Ld while reducing the change in the q-axis inductance Lq by improving the shape of the portion having a margin for the magnetic flux density. The torque can be increased.

According to the above embodiment, the following effects can be obtained.
(1) As a configuration of the rotor 20 of the rotary electric machine, in the rotary electric machine 10 disposed so that the outer peripheral surface of the cylindrical rotor core 30 faces the inner peripheral side of the stator 100 wound with the coil 104 via the gap G It is a rotor 20. The rotor core 30 is formed by laminating the electromagnetic steel plates 60. The electromagnetic steel plates 60 are joined together by caulking portions 39, and the caulking portions 39 are disposed outside the q-axis magnetic path.

  Therefore, since the caulking part 39 which joins electromagnetic steel plate 60 comrades is arrange | positioned out of the q-axis magnetic path, rotor core 30 is formed, without reducing salient pole ratio (Lq / Ld) in the rotary electric machine using reluctance torque. can do.

  (2) The notch 37 is formed on the outer surface of the rotor core 30 so as to leave the protrusion 38 extending toward the outer surface, and the caulking portion 39 is formed on the protrusion 38. Thus, the leakage flux can be suppressed.

  (3) The rotor core 30 has flux barriers 33 and 34 extending along the q-axis magnetic path, and the flux barriers 33 and 34 are located on the inner wall from the position where the inner diameter side wall surfaces 33a and 34a along the q-axis magnetic path It is formed to spread to the adjacent magnetic pole side. That is, the flux barriers 33 and 34 extending along the q-axis magnetic path in the rotor core 30 take account of the fact that the q-axis magnetic path has a margin for the magnetic flux density and the rotor core 30 is not effectively utilized. The inner diameter side wall surfaces 33a and 34a are formed so as to spread to the adjacent magnetic pole side from the position along the q-axis magnetic path. Thus, the salient pole ratio (Lq / Ld) can be increased by decreasing the d-axis inductance Ld while reducing the change in the q-axis inductance Lq.

The embodiment is not limited to the above, and may be embodied as follows, for example.
The permanent magnets 40 and 41 may be omitted. That is, the present invention may be applied to a reluctance motor. In this case, the permanent magnet insertion hole 31 and the flux barriers 33 and 34 in FIGS. 1 and 2 constitute a continuous flux barrier, and the permanent magnet insertion hole 32 and the flux barriers 35 and 36 constitute a continuous flux barrier Ru.

  -It may be configured as shown in FIG. 5 instead of FIG. In FIG. 5, permanent magnets 40 and 41 are embedded in the rotor core 30 in the state where flux barriers 33, 34, 35 and 36 are arranged at q-axis side end portions, and permanent magnets in the flux barriers 33, 34, 35 and 36. Crimping portions 160, 161, 162, and 163 are formed on the positioning protrusions 150, 151, 152, and 153 on both sides of 40 and 41, respectively. Thus, the leakage flux can be suppressed.

Details will be described below.
As shown in FIG. 5 (b), each crimped portion 160, 161, 162, 163 has a rectangular protrusion 164 formed on each electromagnetic steel plate 60, and the respective electromagnetic steel plates 60 are overlapped and pressed to form each electromagnetic steel plate 60. The protrusions 164 are fixed by plastic deformation of metal.

  As shown in FIG. 5A, the permanent magnet 40 is disposed without arranging the caulking portions 160, 161, 162, 163 for fixing the electromagnetic steel plate 60 in the magnetic path of the rotor 20 (without lowering the torque). , 41 to fix the steel plate so as to reduce the magnetic flux leakage from the plate.

  In addition, flux barriers 33, 34, 35, and 36, which are large spaces, are provided inside, and the magnetic steel plates 60 are fixed by caulking portions 160, 161, 162, and 163 using the grooves (spaces). Since the space not used as the q-axis magnetic path is utilized, the reduction in torque does not occur.

  Furthermore, deterioration of the magnetic characteristics of the magnetic steel sheet 60 due to the caulking portion can be actively utilized by using the caulking portion for the positioning projections 150, 151, 152, 153 which are portions for fixing the permanent magnets 40, 41. . That is, in the positioning projections for positioning of the permanent magnet, leakage magnetic flux which is a shortcut through the positioning projections is likely to be generated, which tends to cause torque reduction. In the case of FIG. 5A, the crimped portions 160, 161, 162, 163 are less likely to be a magnetic path because the electromagnetic steel plate 60 is deteriorated, and leakage flux which is a shortcut through the positioning projections 150, 151, 152, 153 Is hard to occur. In this manner, the leakage magnetic flux from the permanent magnets 40 and 41 can be reduced by the caulking portions 160, 161, 162 and 163 provided on the positioning projections 150, 151, 152 and 153 to prevent a reduction in torque.

  As described above, when substantially the entire rotor core 30 is used as a magnetic path, the performance (such as torque) is significantly reduced if a crimped portion as described in Patent Document 1 is provided. In addition, it is difficult to obtain sufficient bonding strength by caulking on the inner diameter side which is not utilized as a magnetic path (at a portion where the magnetic flux density is low).

  According to the configuration of FIG. 5, the magnetic path of the rotor 20 is impeded by providing the caulking portions 160, 161, 162, 163 in the air gaps (flux barriers 33, 34, 35, 36) which are not utilized as magnetic paths. It is possible to fix the electromagnetic steel plate 60 without. Further, since the outer peripheral side of the rotor core 30 is fixed, higher bonding strength can be obtained as compared with fixing the inner diameter side of the rotor core 30, and inconveniences such as opening of the electromagnetic steel plate 60 on the outer peripheral surface of the rotor core 30 are also obtained. It is hard to occur.

  As described with reference to FIG. 5, the protrusions 150, 151, 152, which project into the flux barriers 33, 34, 35, 36 formed on the q-axis side end portions of the permanent magnets 40, 41 embedded in the rotor core 30. The crimped portions 160, 161, 162, 163 are formed on the portion 153. In particular, the projections 150, 151, 152, 153 are positioning projections of the permanent magnets 40, 41. Further, the projections 150, 151, 152, 153 on which the crimped portions 160, 161, 162, 163 are formed are outside the inner wall surface 33a, 34a, 35a, 36a of the inner wall of the flux barrier 33, 34, 35, 36 The radial side wall surfaces 33b, 34b, 35b, 36b project toward the side wall surfaces.

  The shapes of the crimped portions 160, 161, 162, and 163 in FIG. 5 are not limited in shape as long as the air gaps (flux barriers 33, 34, 35, and 36) are not short-circuited. In plan view of the electromagnetic steel plate 60 of FIG. 5A, the caulking portions 160, 161, 162, and 163 are quadrangular.

  -It may be configured as shown in FIGS. 6 (a) and 6 (b) instead of FIG. That is, in the case where it is difficult to form the caulking portions 160, 161, 162, 163 on the positioning protrusions 150, 151, 152, 153 of the permanent magnets 40, 41 in FIG. .

Details will be described below.
Also in FIG. 6A, the rotor core 30 has flux barriers 33, 34, 35, 36 extending along the q-axis magnetic path, and among the flux barriers 33, 34, the inner wall surface 33a, 34a is the inner wall. It is formed so as to spread to the adjacent magnetic pole side from the position along the q-axis magnetic path. Crimping portions 180, 181, 182, and projections on protrusions 170, 171, 172, 173 protruding into flux barriers 33, 34, 35, 36 formed on q-axis side end portions of permanent magnets 40, 41 embedded in rotor core 30 183 are formed. The protrusions 170, 171, 172, 173 are formed at positions separated from the permanent magnets 40, 41. Specifically, the projections 170, 171, 172, 173 are formed on the inner diameter side wall surfaces 33a, 34a, 35a, 36a of the inner walls of the flux barriers 33, 34, 35, 36 extending along the q-axis magnetic path. In particular, in the flux barriers 33 and 34, the projections 170 and 171 extend from the position along the q-axis magnetic path to the adjacent magnetic pole side (portion parallel to the boundary Bm of the magnetic pole) and the positioning projections of the permanent magnet 40 It is formed between 150 and 151.

  The projections 170, 171, 172, 173 on which the crimped portions 180, 181, 182, 183 are formed are the outer walls of the inner walls of the flux barriers 33, 34, 35, 36 from the inner diameter side wall surfaces 33a, 34a, 35a, 36a It projects toward the wall surfaces 33b, 34b, 35b and 36b. The projections 170, 171, 172, 173 are surrounded by flux barriers 33, 34, 35, 36, respectively.

  As shown in FIG. 6 (b), each crimped portion 180, 181, 182, 183 has a rectangular protrusion 184 formed on each electromagnetic steel plate 60, and the electromagnetic steel plates 60 are overlapped and pressurized. The protrusions 184 are fixed by plastic deformation of metal.

  Thus, the leakage flux from the permanent magnets 40 and 41 can be obtained without arranging the caulking portions 180, 181, 182 and 183 for fixing the electromagnetic steel sheet 60 in the magnetic path of the rotor 20 (without reducing the torque). The electromagnetic steel sheet 60 can be fixed to reduce the

  That is, the rotor structure is provided with the flux barriers 33, 34, 35 and 36 which are large spaces inside, and the grooves (spaces) are used to make the electromagnetic steel plate 60 by caulking parts 180, 181, 182 and 183. Fix it. At this time, since a space not used as the q-axis magnetic path is utilized, a decrease in torque does not occur. That is, by providing caulking portions 180, 181, 182 and 183 in the air gap portions (flux barriers 33, 34, 35 and 36) which are not utilized as the magnetic path, the magnetic steel plate 60 can be made It can be fixed. Further, since the outer peripheral side of the rotor core 30 is fixed, higher bonding strength can be obtained as compared with fixing the inner diameter side of the rotor core 30, and inconveniences such as opening of the electromagnetic steel plate 60 on the outer peripheral surface of the rotor core 30 are also obtained. It is hard to occur.

  The shapes of the crimped portions 180, 181, 182 and 183 in FIGS. 6 (a) and 6 (b) are not restricted in shape unless the air gaps (flux barriers 33, 34, 35 and 36) are shorted. In plan view of the electromagnetic steel plate 60 of FIG. 6A, the caulking portions 180, 181, 182, and 183 are quadrangular.

  6 (a) and 6 (b), caulking parts 180, 181, 182, in the projections 170, 171, 172, 173 different from the positioning projections 150, 151, 152, 153 of the permanent magnets 40, 41. It formed 183. Alternatively, crimped portions 180, 181, 182, and 183 may be formed on the protrusions 170, 171, 172, and 173 when the positioning protrusions 150, 151, 152, and 153 are not provided. That is, for example, the present invention may be applied to the case where the permanent magnets 40 and 41 are inserted into predetermined positions of the permanent magnet insertion holes 31 and 32 of the rotor core 30 using a jig and fixed with an adhesive.

  Further, as shown in FIG. 6C, the projections 190 on which the caulking portions 191 are formed are provided on the outer diameter side wall surfaces 33b, 34b, 35b and 36b of the inner walls of the flux barriers 33, 34, 35 and 36, It may be protruded toward inner diameter side wall surface 33a, 34a, 35a, 36a from outer diameter side wall surface 33b, 34b, 35b, 36b. As shown in FIG. 6 (a), the projections 170, 171, 172, 173 are formed on the inner wall surface 33a, 34a, 35a, 36a of the inner walls of the flux barriers 33, 34, 35, 36 as compared with FIG. It is easier to form a crimped part if it is provided.

-Although two layers of flux barriers and permanent magnets are provided in the radial direction, three or more layers may be provided regardless of the number of layers.
-The number of poles is not limited to four. It may be more or less than four poles.

  DESCRIPTION OF SYMBOLS 10 ... Rotary electric machine, 20 ... Rotor, 30 ... Rotor core, 33, 34, 35, 36 ... Flux barrier, 33a, 34a, 35a, 36a ... Inner diameter side wall surface, 33b, 34b, 35b, 36b ... Outer diameter side wall surface, 37 ... Notches 38 ... Protrusions 39 ... Crimping parts 40, 41 ... Permanent magnets, 60 ... Magnetic steel plates, 100 ... Stators, 104 ... Coils, 150, 151, 152, 153 ... Positioning projections, 160, 161, 162 , 163: crimped portion, 170, 171, 172, 173: projection, 180, 181, 182, 183: crimped portion, 190: projection, 191: crimped portion, G: gap.

Claims (7)

It is a rotor of a rotating electrical machine disposed so that the outer peripheral surface of a cylindrical rotor core faces the inner peripheral side of a stator wound with coils via a gap,
The rotor core is configured by laminating electromagnetic steel sheets,
The electromagnetic steel plates are joined by a caulking portion,
The caulking portion is disposed outside the q-axis magnetic path ,
A notch is formed on the outer surface of the rotor core so as to leave a protrusion extending toward the outer surface;
The rotor of a rotating electrical machine , wherein the caulking portion is formed on the protrusion . The rotor of the rotating electrical machine according to claim 1, characterized in that caulking portion projection projecting to the q-axis side end formed in a flux barrier to the portion of the permanent magnets embedded in the rotor core is formed. The rotor according to claim 2 , wherein the projection is a positioning projection of the permanent magnet. It is a rotor of a rotating electrical machine disposed so that the outer peripheral surface of a cylindrical rotor core faces the inner peripheral side of a stator wound with coils via a gap,
The rotor core is configured by laminating electromagnetic steel sheets,
The electromagnetic steel plates are joined by a caulking portion,
The caulking portion is disposed outside the q-axis magnetic path ,
A caulking portion is formed on a protrusion protruding into a flux barrier formed at the q-axis side end of the permanent magnet embedded in the rotor core,
The said protrusion is formed in the position spaced apart from the said permanent magnet , The rotor of the rotary electric machine characterized by the above-mentioned . The rotor according to claim 2 , wherein the projection is formed at a position separated from the permanent magnet. The rotation according to any one of claims 2 to 5, wherein the projection on which the caulking portion is formed protrudes from an inner diameter side wall surface to an outer diameter side wall surface in an inner wall of the flux barrier. Electric motor rotor. The rotor core has a flux barrier extending along the q-axis magnetic path,
7. The flux barrier according to claim 1, wherein an inner diameter side wall surface of the inner wall is formed so as to spread to the adjacent magnetic pole side from a position along the q-axis magnetic path. Rotor of rotating electric machine.

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