JP2003180061A - Motor and circulator pump using the motor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To enhance the efficiency of a motor. <P>SOLUTION: The motor (100) comprises a rotor (106), a stator (110), and a bearing (136) which spherically supports the rotor. The rotor produces a magnetic field. The surface of the rotor facing the stator has a spherical configuration. The rotor and the stator are adapted to each other so that a maximal magnetic force is larger than a maximal lift force in the axial direction (axial force). <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a motor having a rotor (rotor) and a stator (stator), the rotor being supported in a spherical shape.

Motors of this kind are used, for example, in circulation pumps, have a low shaft height and are quiet due to the small play of the spherical bearings and their non-wear.

[0003]

SUMMARY OF THE INVENTION According to the present invention, this is solved by the following method. The rotor produces a magnetic field, and the shape of the rotor facing the stator is spherical. The axial magnetic holding force (which keeps the rotor on a spherical bearing) is the maximum axial lift (maximal).
The rotor and stator are designed to be larger than the axis counterforce).

When a rotor having a permanent magnet for generating a magnetic field is used, there is no loss, so that high efficiency can be realized. Furthermore, since the stator can be installed more compactly,
Eddy current loss can be reduced.

By adjusting the magnetic holding force, it is possible to prevent the rotor from being lifted up from the bearing due to the magnetic force even when the motor is turned off. In particular, the rotor and the stator are designed so that the magnetic force at one end of the rotor is greater than that at the opposite end, so that even when there is maximum lift, such as lift due to hydraulic pressure, the holding force causes the rotor to It is pressed against the sliding surface of the spherical bearing.

According to the solving means of the present invention, a motor having a small shaft height can be realized.

In this way, a motor having a spherical bearing can be realized, the motor is highly efficient, and at the same time, the advantages of the spherical bearing described above can be exhibited.

It is particularly advantageous when the stator yoke is arranged around the rotor. This results in a simple stator and yoke design. In particular, no teeth are needed to hold the winding. Such teeth lengthen the magnetic path and increase eddy current losses. The solution of the invention minimizes the magnetic path. Such a motor has a low shaft height and is made compact. Counter bearings can be used that provide a sufficiently large magnetic force to either hold the rotor on a spherical bearing or prevent the rotor from rising and disengaging.

The design of the stator is simplified when the yoke surrounding the rotor is closed, especially when the yoke is annularly arranged around the rotor.

It is particularly effective when the surface of the yoke facing the rotor is spherical. As a result, the yoke has a simple shape and prevents the occurrence of eddy current loss. Furthermore, the distance between the rotor and the magnetic yoke can be made large enough, resulting in a large air gap,
The windings of the stator can be arranged in the air gap. By adjusting the holding force of the permanent magnet magnetic poles of the rotor, the magnetic holding force in the axial direction can be made larger than the maximum lift force (for example, lift force due to hydraulic pressure).

As a result, a synchronous motor having a spherical bearing can be realized.

The essentially concentric circles of the rotor and the yoke make it possible to adjust the maintenance force which keeps the rotor of the motor on the bearing under all operating or operating conditions.

It is advantageous when the yoke varies its inner diameter monotonously with respect to the axis of rotation of the rotor, such that one of the rotor diameters is large and the other is small. As a result, the resulting magnetic retentive force can keep the rotor on the bearing. If the rotor has magnetized permanent magnets distributed over its diameter and has 4 or 6 poles, the coercive force of the magnetic field should be greater than the maximum lift (eg hydraulic lift), and Prevents the rotor from coming off.

It is advantageous for the diameter of the yoke to decrease in the direction of the holding force. This allows the holding force to keep the rotor on the bearing.

There is an effect if the inner diameter is limited at this location so that the limited axial component of the magnetic coercive force at the end of the yoke is effective. This causes the resulting magnetic retentive force in the axial direction, which force keeps the rotor well on the bearing under all operating conditions.

The advantage of a motor with a spherical bearing is that of a synchronous motor with a rotor of permanent magnets, when the yoke, whose diameter at the ends becomes smaller, takes such a shape that the magnetic coercive force is greater than the maximum axial lift. Can be combined with. This means that a synchronous motor with spherical bearings is realized.

When the surface of the yoke facing the stator has the shape of a part of a hollow sphere, the magnetic holding force in the axial direction can be adjusted. Some of such hollow spheres correspond to hollow spheres with the polar regions cut away. By having the spherical shape of the corresponding rotor, in particular of the magnetic poles of the rotor, the resulting magnetic coercive force can be adjusted.

It is also effective when the diameter of the first side of the hollow sphere is smaller than that of the second side. The perpendicular on the first side surface and the perpendicular on the second side surface are parallel to the axis of rotation of the rotor, so that the magnetic coercivity can be adjusted. In this case, the first side has a larger distance from the bearing than the second side, and the magnetic holding force keeps the rotor on the bearing and keeps it away from the bearing.

It is effective when the surface of the rotor facing the stator has a spherical shape, and in particular, the magnetic portion of the rotor has a corresponding spherical shape for obtaining the necessary magnetic coercive force.

It is advantageous when an air gap is formed between the rotor and the yoke, in which one or more windings are arranged. The distance between the rotor and the yoke can be made relatively large, for example by creating a magnetic field in the rotor by means of permanent magnets magnetized on its diameter, so that the air gap is sufficiently wide that one or more The windings can be arranged. Therefore, the motor can be designed compact without limiting the function. In particular, the axial height of the motor can be reduced.

It is particularly effective when there are permanent magnetic poles that generate a magnetic field on the circumference of the rotor. In this case, a relatively large distance between the rotor and the yoke can be used.

It is intended to insert a partition between the rotor and the yoke. In the circulation pump, this partition separates the wet part from the dry part. In this case, the winding is positioned behind the partition in the direction of the yoke.

It is effective when the partition wall is made of a non-conductive material which prevents eddy current loss.

It is also effective when the partition wall is a heat insulating material. In that case, the temperature of the fluid carried along the partition in the circulation pump does not rise due to the waste heat of the winding.

Further, the yoke is an axial extension of the rotor.
It is effective when it has the same axis extension as (extension). Thereby, it is easy to create a magnetic holding force in the axial direction.

For manufacturing, it is effective when the partition wall has a coupling portion that closes the first side of the yoke.

It is effective when the connecting portion has a post with respect to the sliding body of the bearing. As a result, the motor is simple and inexpensive to assemble.

The motor according to the invention can easily be integrated into a circulation pump carrying a fluid, in particular a liquid. Such circulation pumps can be manufactured with small shaft heights and are called centrifugal pumps.

In this case, the impeller is connected to the rotor.

In a centrifugal pump, the lift is hydraulic pressure and is generated by an impeller.

[0031]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An overall motor showing an example of a motor according to the invention is designated as 100, this motor being part of a circulation pump 102 and for this purpose forming a pump motor unit. Circulation pump 102 includes a housing 104 in which motor 100 is positioned. The circulation pump is designed as a centrifugal pump, as described below.

The motor includes a rotor 106, which together with the impeller 108 constitutes a unit forming a rotor impeller unit.

In addition, the motor includes a stator 110 having one or more windings 112 and a yoke 114. The yoke 114 is made of a soft magnetic material, and is particularly made by pressing soft iron powder. The soft iron powders are insulated from each other. The stator 110 forms a unit with the housing 104.

The rotor 106 produces a magnetic field. To that end, the rotor comprises one or more magnetic elements 116, which are in particular radially magnetized permanent magnets. Preferably, the magnetic element 116 has a high coercive density (coer).
formed by a permanent magnet having a cive field density, whereby the magnetic poles are distributed in alternating polarities on the circumference of the rotor. Two poles or multiples of two,
Preferably four poles are used.

The surface 118 of the rotor 106 facing the stator 110 is part of a spherical surface, and the magnetic element 116 conforms to the shape of this surface. To protect these magnetic elements 116, the rotor 106 has a cover 120, which is made of plastic or stainless steel and forms a surface 118.

The spherical surface 118 is a part of the virtual ball and has a shape cut perpendicular to an axis 122 (FIG. 2) passing through the center of the virtual ball. This axis is also the axis of rotation of rotor 106.

The rotor 106 facing the housing 104
Region 124 is essentially planar. The region 126 of the rotor 106 facing the impeller 108 is similar. With respect to the surface facing the yoke 114, the rotor 106 is spherical in shape.

Each winding 112 of the stator 110 corresponds to the rotor 1
06 around which the yoke 11
4 also surrounds the rotor 106.

An air gap 128 for magnetic flux is formed between the rotor 106 and the yoke 114. Spherical region, ie wall 1 surrounding surface 118 and each winding 112
32 has a spherical surface 130 facing the air gap 128.
Form part of.

The wall 132 acts as a bulkhead for the moist portion of the circulation pump and, consequently, the bulkhead between the rotor 106 and the stator 110. The wall is made of a non-conductive material, for example plastic. It is also
It is made of an insulating material so that the waste heat of the winding 112 does not heat the liquid carried by the circulation pump 102.

The rotor 106 is supported in a spherical shape and forms a circulation pump. Such a bearing 136 includes a spherical sliding body 138 fixed to the pole 134. The pole 134 extends in the direction of the axis 122 and is connected to the wall 132 by the element 140. This disc-shaped element 140
Connect the spherical regions of the septum at the smallest inner diameter of the yoke.

The pole 134 is connected to the housing 104. The center point of the sliding body 138 is the shaft 122 of the rotor 106.
It lies above and coincides with the center point of the phantom sphere forming surface 118.

Further, the bearing includes a bearing cap 142 made of carbon, for example. The sliding body 138 is made of, for example, ceramic, and has the bearing cap 14
It can slide with respect to 2. The bearing cap 142 is
It is fixed to the rotor 106 and has a spherical sliding surface 144 with respect to the spherical sliding surface of the spherical sliding body 138. A circulation pump is manufactured with the bearing 136.

The yoke 114 forms a ring around the rotor 106.

The surface 146 of the yoke 114 facing the rotor 106 is spherical. This surface is formed by a virtual ball, ideally whose center coincides with the center of the virtual ball for the surface 118 and the center of the spherical slide 138. Due to manufacturing tolerances, these virtual balls are approximately concentric. That means that there is a distance between the centers of the virtual balls that form the spheres 118 and 146.

The air gap 126 is thus formed by the opposing spherical surfaces 118 and 146 and is cup-shaped. In the air gap 126, the winding 112
Is positioned.

The yoke 114 has an axial height in the direction of the axis 122, which axial height is adapted to the axial height of the magnetic element 116. In particular, the front end 148 of the yoke 114 facing the impeller 108 is located at the region 126 of the rotor 106.
Placed near the.

The other end 150 facing the impeller 108 forms the facing end of the stator 110.

The inner region between the surfaces 146 of the stator has a first side (or side) 152 at the other end 150.
With a portion of a hollow sphere having a parallel side 154 on the opposite side 148. The inner diameter of this part of the hollow sphere is 12
2 increases from the first side 152 to the second side 154 perpendicularly to 2, so that the inner diameter at the first side 152 is the smallest in that part of the hollow sphere.

The rotor 106 has a spherical shape, and the yoke 11
It is adapted to the shape of 4. Therefore, the first side 156 has a small inner diameter, and the first side 1 of the hollow sphere portion of the yoke 114 is
Face 52. The diameter of the rotor 106 is this first side 15
It increases from 6 toward the opposite side 158. In particular, the total number of magnetic elements 116 increases monotonically perpendicular to axis 122.

Between sides 156 and 158, rotor 10
Reference numeral 6 has a partial spherical outer shape, and is positioned in the hollow spherical portion of the yoke 114.

Due to the magnetic force between the magnetic element 116 and the stator 110, the rotor experiences a magnetic force and the axial component 160 of the magnetic force pushes the rotor 106 with the bearing cap 142 onto the slide 138.

The rotor receives an axial lift 162, which tries to lift the rotor 106 from the slide 138. In the circulation pump, this lift is impeller 108.
It is caused by the axial force of the liquid produced by.

The rotor 106 and the stator 110 are formed such that under all circumstances the axial component 160 of the magnetic force is greater than the lift 162 so that the rotor 106 is pressed against the slide 138 at all times. This also applies in the situation where the hydraulic pressure is still working immediately after the motor has been switched off.

The magnitude of the coercive force of the portion of the rotor 106 that produces the magnetic field is such that the air gap 128 has such a large radial extent and the axial component 160 of the magnetic force is greater than the maximum lift force acting in the axial direction 122. Chosen to grow. In particular, the yoke 114 is formed so that this condition is satisfied in the region of the first side 152 (that is, the side where the inner diameter of the yoke 114 is small).

At the same time, 1 forming the stator 110
The air gap 128 is chosen so that one or more windings 112 are located within the air gap.

The magnetic coercive force is sufficiently large so that the stator winding 11 can be accommodated in the relatively large air gap 128.
You can enter 2. The yoke 114 has a ring shape and surrounds the rotor 106.

As a result, the motor 100 and the circulation pump 102 can be reduced in size and noise. At the same time, the motor 100, in particular because the permanent magnetic rotor 106 produces a magnetic field and does not create any losses,
High efficiency. Motor stator 11 according to the invention
The shape of 0 is simple. In particular, teeth that increase eddy current loss are unnecessary.

According to the present invention, the spherical bearing 106
A synchronous motor having is realized.

A design example of the windings in the air gap 128 is shown below.

The motor for a circulation pump with a spherical rotor is supported on balls, small in size and low in noise. Synchronous motors with permanent magnet rotors are highly efficient because the rotors do not create losses. The invention relates to a motor having a spherical rotor in which the windings are arranged around the rotor.

A pump with a spherical rotor has the disadvantage that the eddy current losses are high if the windings are supported by complex stator teeth lying axially by the rotor. Moreover, turning off the motor does not immediately hold the rotor in its position on the ball. There are only known synchronous motors with a cylindrical rotor that cannot be easily converted into a spherical rotor.

The present invention avoids both disadvantages. The motor according to the invention comprises a rotor with diametrically magnetized permanent magnets. According to the invention, such a rotor creates a distance between the surface of the rotor and the magnetic yoke, so that the winding can be arranged in its air gap. The inner surface of the yoke, the bulkhead and the rotor operate in concentric spherical zones. This means that the diameter of one axis boundary of the motor is much smaller than that of the other axis boundary. As a result, the resulting force remains due to the difference in the axial component of the magnetic force at the ends of the shaft, which attracts the rotor to the smaller diameter of the ring-shaped yoke. This force must be sufficient to ensure that the rotor is supported on the central bearing ball in all operating conditions, even when the motor is switched off. According to the present invention, if the partition wall between the rotor and the winding is made of a non-metallic material (for example, a polymer), a considerable eddy current loss that cannot be avoided with a metallic material is eliminated. An important advantage of this invention is that the shaft height of the motor is extremely short.

FIG. 3A shows a cross section through the operating part of the centrifugal pump according to the invention. The rotor 21 forms a unit with the pump impeller 22, which unit is supported on a stationary ball 23. The ball 23 is connected to a bearing pole 24, which is a circular disc 25.
Together, they form a unit. This disc closes the smaller diameter 5 of the septum 1. The partition 1 separates the moist part (zone) with the rotor pump impeller units 21, 22 from the outer area with the winding 4 and the yoke 2. The inner surface of the yoke 2 forms a spherical surface that operates concentrically with the outer surface of the partition wall 1. The interaction between the rotor 21 and the inner area of the yoke 2 results in an axial force that presses the rotor 21 onto the ball 23, whereby the axial magnetic component 26 acts in the opposite direction. It must be greater than the dynamic pressure component 27 caused by the pressure.

FIG. 3B is a plan view schematically showing the spherical partition wall 1 surrounding the spherical rotor. This partition is preferably made of a polymer. A space between the partition wall 1'and the magnetic yoke 2 in FIG. 3A allows a magnetic flux to pass therethrough, in which two layers of windings 4 (FIG. 1) for three phases are provided.
Are placed. In this schematic diagram, the phase I winding path represents the area of the winding indicated by the dots. The area indicated by a small circle represents winding II, and the area indicated by a wavy line represents winding III. In many applications, such as circulating pumps for fish tanks and developers for photography, it is a disadvantage to remove waste heat with the fluid being carried. Partition wall 1 made of heat insulating material
(FIG. 3 (A)) can prevent the carried liquid from being heated by the heat flux of the winding.

FIG. 3C shows a plan view of the magnetic yoke 2. On the inner surface there is a groove 30 in which the winding strand 28 according to FIG. 3B is arranged. Between these winding strands 28, the shaded area 31, of the yoke,
32, 33 and 34 reach the spherical surface. When the groove 30 has the same depth as the winding thickness, the inner surface of the yoke 2 does not protrude, and the insulating layer can easily cover the entire surface. It is preferable to use fine iron particles as the material of the yoke. The fine particles are insulated from each other and pressed into the shape shown.

FIG. 4A is a cross-sectional view schematically showing the spherical rotor 21 together with the spherical partition wall 1 made of polymer and parallel to the rotation axis. A space between the partition wall 1 and the magnetic yoke 2 allows a magnetic flux to pass therethrough, in which three phase or phase windings 4 are arranged. The winding paths schematically shown are a dashed line I for phase I, a one-dot chain line II for phase II, and a two-dot chain line III for phase III.

FIG. 4B shows three strands I, II and II.
The top view of the partition 1 which has a path of I is shown. Each strand starts from the outer circumference 9 of the ring-shaped yoke 2, goes to its inner peripheral edge (rim) 5, and then changes its direction by 180 degrees and returns to the outer circumference 9 (I '). Then, it goes to the inner peripheral edge portion 5 and returns to the starting point I ″.

As can be seen in FIG. 4C, the width I ″ of the winding I is less than one sixth of the circumference of the small diameter edge 5 of the partition 1.

FIG. 5A shows a path of two single conductor wires in which the conductor wire 6 is represented by a dotted line and the conductor wire 7 is represented by a solid line. At the circumference of the small edge 5, the conductor 6 is bent at a virtual tangent line 8,
Turns left like a hairpin. Part from there 6 '
Passes behind the spherical bobbin 10 and exits to the circumference 9 of the edge 5 having the larger diameter. The conductor 7 is parallel to the conductor 6 on the larger diameter side. When it reaches the end of the smaller diameter, it runs under the conductor 6 '. The conductor 7 is then bent in the same way as the conductor 6 at the imaginary tangent 8 at the end of the bobbin.
The conductor portion 7'is parallel to the conductor 6'on the inside. On the larger circumference 9, the conductor 7'is bent so as to wind around the tangent 8 '.

FIG. 5 (B) shows a spherical bobbin 10, which comprises a thin sheet of insulating material. In the area that is shifted 180 degrees with respect to the region 16, the conductor wire passes behind the bobbin 10 and only the bobbin 10 is visible. Parts 17 and 17 to 18
The conductor 18 is visible in the 0 ° shifted portion. Figure 5
Instead of the virtual tangent lines 8 and 8'of (A), a circumferential portion 14 '
And 15 ', the bobbin 10 is a virtual tangent line. Bobbin 10
And three windings 18 are respectively shifted 120 and 240 degrees about the axis of rotation to form the windings for the three-phase motor. Instead of using bobbin 10 to stabilize the winding, a wire that melts with a heat-melting coating is used for the winding.

FIG. 5C shows the winding of the conducting wire 6'on the outer circumference 20 of the bobbin 10 on two sides. Each conductor is bent twice around two imaginary axes, which is perpendicular to the axis of rotation. Further, the front conductor portion 6'and the rear conductor portion 6 "of the bobbin 10 are bent at an imaginary axis 19 parallel to the rotation axis.

6 (A), 6 (B) and 6 (C)
Shows another configuration of the winding. Here, the strand portion 41
Are in the magnetic yoke 40 and consist of parallel conductors. The strand portion runs from the small diameter edge 45 of the magnetic yoke to the large diameter edge 49. There, the strands are wound on an imaginary axis 42, approximately parallel to the diameter of the magnetic yoke 2 ', and lying on the first plane at the outer circumference of the magnetic yoke 2'. It is then folded back onto the strand portion 43 and follows the spherical curvature of the magnetic yoke 2 '. Here, it is connected to the strand A adjacent to the small diameter edge 45 of the yoke 2 '. Here, the end 44 of the strand portion is folded back at the smaller diameter edge 45 of the yoke 2 ', as shown in FIG. 6B, and bends to the outside on the second face, which is larger in the yoke 2'. It has a diameter of 49 and is parallel to the first plane.

In FIG. 7A, the same yoke 2'has strand portions A to L. The strand portions 41 and 43 are of a 4-pole 3-phase motor. This motor requires the following connections according to the winding pattern for 4 layers and 3 layers.

For A and D, G and H, C and F, I and L, E and H, B and K two-phase motors, the strand portion 41 is used.
The number of and 43 must be increased to a larger number divisible by 8.

FIG. 7B schematically shows a sectional view of the pump motor unit, in which the flow is guided from one shaft end to the other shaft end. In the simplest case where the motor has no bulkhead, the liquid needs to be an electrical conductor (a non-conductor), since the electrical part of the motor is exposed to the liquid to be carried. The rotor 50 forms a unit with the pump impeller 51, and the unit is rotatably supported by the balls 52. The ball 52 is fixed to the suction tube 53 by three fins. The flow follows arrow 54. In contrast to the pump shown in FIG. 3 (A), in this pump with a coaxial flow, the magnetic force and hydraulic pressure work in the same direction. The winding 55 is on the inner surface of the magnetic yoke 56 and is in contact with the fluid being carried.

7 (C) and 7 (D) show a method of manufacturing a winding strand. It starts with a helix with a large diameter. The manufacture of the windings shown above requires the conductors to pass through the holes like a transformer with a ring-shaped core, but the winding pattern shown here is a spiral consisting of one conductor layer melted together. Begins. The first stage is spiral, the second
As can be seen in FIG. 7 (C) as a step, for a two-pole motor, the circumference of the helix is divided into four equal length sections 61 and folded at a virtual axis 60 extending vertically. Then, the central portion is bent at an imaginary axis 62 extending radially, and the strand portion 64 is rotated 90 degrees, and the arc 6
3 is formed. As a third step, according to FIG. 7D, the arc 63 is bent so that the ends of the strand portions 68 and 69 meet. Then the strands 68 and 69
The remaining part of the arc 63 by is along the virtual axis 66,
The fold line is formed so that the strand portion 68 forms an angle 67 of about 30 degrees. Two strands 68 and 6
9 encloses a larger angle 67 '. The windings of a two pole motor form a shape similar to a crown and are located in the air gap between the rotor and the magnetic yoke.

FIG. 8 shows another winding pattern for a 2-phase 4-pole motor. The winding also starts with a spiral. As a second step, the helix is wrapped around the virtual axis 70.
As mentioned in FIG. 7C, the axis is parallel to the tangent of the edge with the large diameter. As the third stage, the part of the arc is
Half bent according to arrows 76 'and 77 and twisted inside the bobbin 73 with respect to the smaller diameter edge, which allows a second fold 75.
The adjacent portions 78 are then twisted in the same direction of rotation. The remaining part is similarly bent twice, part 7
8 ″ arrives at the starting point 70. Folds 70, 75, 7
1 and 74 are along the perimeter. For ease of understanding, the strands are represented in a smaller size than is necessary for full use as the available winding area. In the remaining portion, windings having the same pattern as the second phase are arranged with a 90 degree shift around the rotation axis.

The centrifugal pump is operated by a motor, which forms a unit with the pump and has a winding system and a spherical rotor for driving the pump impeller. The pump impeller, together with the rotor, forms a unit, which is pressed against the centrally located ball by magnetic force.
The unit includes a rotor 21, and the rotor has magnetic poles of permanent magnets distributed on its outer circumference, and the coercive force of the rotor 21 keeps the radial distance between the rotor 21 and the magnetic yokes 2 and 2'of the ring-shaped soft magnetic material. Can be large. A magnetic loop is formed therebetween, the axial extension of which is defined by an edge of large diameter and an edge of smaller diameter. The winding strand 4 can be arranged in the air gap. The surfaces of the yokes 2 and 2'close to the small diameter 5 generate a magnetic force by the action with the rotor 21, and the axial component 26 thereof is larger than the axial force 27 due to the liquid generated by the pump impeller 22.
The rotor 21 is pressed against the balls 23 in all operating conditions, including the situation where there is still fluid thrust immediately after the stop, with the winding strands 4 in the ring-shaped area between the rotor and the yokes 2, 2 '. .

The partition wall 1 between the rotor 21 and the winding 4 is partially spherical and separates the wet part from the dry part.

The partition wall is made of an electrically non-conductive (non-conductive) material. Also made from stainless steel.

The partition wall has a heat insulating function.

The surface of the yoke 2 facing the rotor operates on a spherical surface.

Preferably, the axial length of the yoke 2 is the same as that of the rotors 21 and 40.

The strands of the windings 4, 28 and 55 are
Preferably, the ring-shaped yokes 2, 2'do not extend axially.

The ring-shaped yoke 2 has a magnetically conductive region 31,
32, 33, 34, in which the strands of winding wind in the groove 30.

The ring-shaped yoke 2 ″ is made of a sheet-shaped metal ring.

The yokes 2, 2 "and 56 are made of iron fine particles, and the particles are electrically insulated from each other.

The strand portion of the winding wire 4 runs on a line oblique to the rotation axis on the outer surface of the spherical partition wall 1. Partition wall 1 is rotor 2
1 and winding 4, its axial length approximately corresponds to the length between the large diameter 9 edge and the small diameter edge of the partition 1.

Each of the conductors 6, 7 of the winding is bent, for example at an imaginary tangent line 8, 8 ′ by 180 ° and is parallel to the outer circumference of the edge 19 with the larger diameter 9 and to the edge with the smaller diameter 5. .

The bobbin 10 is made of a sheet of an insulating material, and is a strand portion of a winding which can be formed in phase. The bobbin operates in the form of an imaginary spherical strip and has two regions 15 'which adjoin the long diameter outer circumference 9 of the partition 1. Furthermore, it has two regions 14 'which adjoin the outer circumference 5 having the smaller diameter of the partition.
Around it, each strand 17 of the winding
Strand section 6 as seen in the direction of rotation of
Is bent from the outer circumference of the larger diameter to the front side of the bobbin 10 and the strand portion 6'starts from the outer circumference of the smaller diameter 5 to the rear side of the bobbin 10.

The bobbin 10 is formed by a strip of insulating film.

The septum 1 closes the small diameter 5 and the post 24
Has a circular disc 25 for supporting.

The winding consists of strand parts 41, 43 with conducting wires running parallel to each other and follows the contour of the ring-shaped yokes 2 ', 40 in the air gap. The strand parts 41, 43 have their ends 45, 46 at their ends 45, 46.
Is bent outwards at the edges of and is wrapped around the geometrical axis 42.

The strand sections for 4-pole operation must be connected in the following pattern (labeled by letters).

Each strand of the A and D, G and J, C and F, I and L, E and H, B and K windings is made of a spiral of conducting wire by an appropriate winding method.

Furthermore, the procedure for manufacturing the windings of the motor according to the present invention requires the following steps.

A) the conductors are wound into a large diameter spiral; b) preferably the conductors are melted together; c) the spirals are axial 6 in region 61 such that they are at the same distance from each other.
Folded around 0. The angle depends on the number of poles, but is formed such that there is an angle of 45 degrees between each; d) The helix is then bent like a crown and one strand section 64 is twisted 90 degrees. ,for that reason,
An arc 63 is formed between the two regions, and the virtual bending axis 62 of the arc is formed in a direction perpendicular to the virtual axis 60; e) Then, each arc 63 has a spiral region 64 of the virtual axis 60. Bent to turn; f) a triangle 66 'is then made by folding around an imaginary axis 66, which, together with the helical region 68, encloses an angle 67 of about 30 degrees. .

[Brief description of drawings]

FIG. 1 shows a perspective sectional view of a circulation pump according to an embodiment of the present invention.

2 shows an enlarged view of a part of the circulation pump of FIG.

FIG. 3 (A) is a sectional view parallel to an axis passing through the circulation pump of the embodiment, FIG. 3 (B) is a plan view of a partition wall with windings, and FIG. 3 (C) is a hollow spherical shape. Shows the yoke.

4 (A) is a cross-sectional view through a yoke and an exposed partition wall, FIG. 4 (B) shows an arrangement of conductors on the partition wall for one winding strand, and FIG. C) indicates the maximum allowable width of the strand.

5 (A) shows the path of the strands before and after the bobbin, FIG. 5 (B) shows the bobbin for one strand, and FIG. 5 (C) shows the appendages around it.

6A is a plan view of a yoke having a flat winding, FIG. 6B is a cross-sectional view through FIG. 6A, and FIG. 6C is FIG. It is the figure seen from the bottom of A) and FIG. 6 (B).

FIG. 7 (A) shows a winding pattern for a 4-pole motor, FIG. 7 (B) shows a circulation pump motor unit with coaxial flow, and FIG. 7 (C) shows a method of manufacturing a strand. The first step is shown, and FIG. 7D shows the second step in the method for producing a strand.

FIG. 8 shows yet another method of manufacturing a strand.

[Explanation of symbols]

100 ... Motor 102 ... Circulation pump 106 ... rotor 110 ... Stator 114 ... York 136 ... Bearing

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁷ Identification code FI theme code (reference) H02K 7/14 H02K 7/14 B (71) Applicant 502364660 Burger Lang Germany Marbach 71672 Kirchen Weinbergstraße 45 (72) ) Inventor Karsten Lang United States California San Diego La Jora (72) Inventor Zoltan Yogosic Hungarian Republic of Ggolar F Term (Reference) 3H022 AA01 BA03 CA50 DA00 5H002 AB01 AC07 AE08 5H605 BB05 BB09 BB10 BB14 BB17 BB20 CC04 DD09 GG18 EB07 5H607 AA12 BB01 BB07 BB15 BB25 BB27 CC05 FF06 GG01 GG02 GG07 GG09 5H621 BB07 JK13 JK19

Claims (25)

[Claims] 1. A rotor (106) and a stator (11)
0) and the rotor (106) is suspended in a spherical shape, the rotor (106) generates a magnetic field, and the surface of the rotor (106) facing the stator (110) is spherical, and the rotor (106) is And the stator (110) are fitted to each other by an axial magnetic holding force (160), and the force holding the rotor (106) on the spherical bearing (136) is greater than the maximum axial lift (162). The featured motor. 2. The stator yoke (114) is a rotor (1).
Motor according to claim 1, characterized in that it is arranged around 06). 3. A yoke (1) surrounding a rotor (106).
14. The method according to claim 2, wherein 14) is a closed structure.
Listed motor 4. The yoke (114) is characterized in that it is arranged annularly around the rotor.
Motor described. 5. Motor according to claim 2 or 4, characterized in that the yoke (114) has a spherical surface facing the rotor (106). 6. A motor as claimed in claim 2, characterized in that the rotor (106) and the yoke (114) are essentially concentric. 7. The inner diameter of the yoke (114) is the rotor (10).
Motor according to any one of claims 2 to 6, characterized by a simple change to a plane perpendicular to the axis of rotation (122) of 6). 8. The inner diameter of the yoke (114) has a magnetic holding force (1
Motor according to claim 7, characterized in that it decreases in the direction of 60). 9. Motor according to claim 7, characterized in that one end (150) of the yoke has a finite diameter. 10. The yoke (114) in the region of one end (150) having a small diameter is designed such that the axial magnetic retentive force (160) is greater than the maximum axial lift (162). The motor according to claim 9, characterized by: 11. A yoke (1) facing a rotor (106).
The motor according to any one of claims 2 to 10, wherein the surface of (14) has a shape of a part of a hollow sphere. 12. A diameter of a part of the hollow sphere on the first side is smaller than that on the second side (154), and a perpendicular line of the first side (152) and a perpendicular line of the second side (154) rotate the rotor (106). Axis (12
Motor according to claim 11, characterized in that it is parallel to 2). 13. Motor according to claim 12, characterized in that the first side (152) is farther from the bearing (136) than the second side (154). 14. The motor according to claim 1, wherein the surface of the rotor (106) facing the stator (110) is in the shape of a part of a sphere. 15. An air gap (128) is formed between the rotor (106) and the yoke (114), and one or more windings (112) of the stator (110) are disposed therein. The motor according to any one of claims 1 to 14, characterized in that 16. A motor as claimed in claim 1, characterized in that the rotor (106) has the poles of permanent magnets distributed on its circumference. 17. Motor according to claim 1, characterized in that a partition wall (132) is positioned between the rotor (106) and the stator (110). 18. The motor according to claim 1, wherein the partition wall (132) is made of a non-conductive material. 19. Motor according to claim 17 or 18, characterized in that the partition wall (132) is thermally insulated. 20. The partition wall (132) has a connecting element (140), the connecting element being the first side (15) of the yoke (114).
20. The motor according to claim 17, wherein the partition wall is closed in 2). 21. The connecting element (140) is a rotor (136).
21. Motor according to claim 20, characterized in that it forms a unit with a post (134) for the sliding body (138) of the. 22. The axial extension of the yoke (114) is adapted to the axial extension of the rotor (106),
The motor according to any one of claims 2 to 21. 23. A circulation pump comprising a motor (100) according to any one of claims 1 to 22. 24. The impeller (108) is a rotor (106).
The circulation pump according to claim 23, wherein the circulation pump is connected to the. 25. Circulation pump according to claim 23 or 24, characterized in that the lift (162) is hydraulic.