JP2019129635A - Stator, rotary electric machine comprising the same, and vehicle comprising the rotary electric machine - Google Patents

Abstract

To provide a rotary electric machine and a stator capable of reducing a loss and improving an output.SOLUTION: A stator of a rotary electric machine according to one embodiment comprises: a support plate 4 formed of a nonmagnetic metal; coils 91 and 92 supported by the support plate; and a plurality of iron cores 81, 82, and 83 supported by the support plate. The support plate has high-resistance regions 48A, 48B, and 48C located between the plurality of iron cores.SELECTED DRAWING: Figure 6

Description

  An embodiment of the present invention relates to a rotating electrical machine including a stator and a vehicle including the rotating electrical machine.

  As an example of a rotating electrical machine, an axial gap motor is known in which a rotor connected to a shaft and a stator disposed around the shaft are disposed opposite to each other in the axial direction of the shaft with a gap. The stator includes a disk-shaped nonmagnetic metal support plate, a coil supported by the support plate, and a plurality of iron cores. The support plate of the stator is disposed in a direction orthogonal to the direction of generation of the magnetic flux. Therefore, during operation of the rotating electrical machine, a large eddy current loss occurs inside the support plate, which causes an increase in loss of the rotating electrical machine and a reduction in output. Furthermore, the eddy current loss degrades the electrical characteristics of the rotating electrical machine.

JP 2017-55556 A

  The problem to be solved by the present invention is to provide a stator and a rotating electrical machine capable of reducing loss and improving output.

  A stator of a rotating electrical machine according to an embodiment includes a support plate formed of a nonmagnetic metal, a coil supported by the support plate, and a plurality of iron cores supported by the support plate, The support plate has a high resistance area located between the plurality of iron cores.

FIG. 1 is a perspective view schematically showing an appearance of a rotating electrical machine (motor) according to a first embodiment. FIG. 2 is an exploded perspective view of the motor showing components of the motor in an exploded manner. FIG. 3 is a schematic sectional view of the motor. FIG. 4 is an exploded perspective view of the stator. FIG. 5 is a perspective view of a first iron core included in the stator. FIG. 6 is a plan view of a stator of the motor. 7 is a cross-sectional view of the stator taken along line B-B of FIG. FIG. 8 is a cross-sectional view of the stator taken along line C-C of FIG. FIG. 9 is a perspective view of the stator with the second support plate omitted. 10 is a cross-sectional view of the first iron core portion of the stator taken along line DD in FIG. FIG. 11 is a plan view showing a partially broken stator of a motor according to a second embodiment. FIG. 12 is a plan view showing a motor stator according to a third embodiment with a part broken. FIG. 13 is a cross-sectional view of a stator according to a third embodiment. FIG. 14 is a plan view showing a stator according to a fourth embodiment with a part broken. FIG. 15 is a cross-sectional view of a stator according to a fifth embodiment. FIG. 16 is a plan view showing a partially broken stator according to a sixth embodiment. FIG. 17 is a view showing an example in which the motor is applied to a railway car.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
The disclosure is merely an example, and appropriate modifications which can be easily conceived by those skilled in the art without departing from the spirit of the invention are naturally included in the scope of the present invention. In addition, the drawings may be schematically represented as to the width, thickness, shape, etc. of each portion in comparison with the actual embodiment in order to clarify the description, but this is merely an example, and the interpretation of the present invention is not limited. It is not limited. In the specification and the drawings, the same elements as those described above with reference to the drawings already described may be denoted by the same reference numerals, and the detailed description may be appropriately omitted.

First Embodiment
In the present embodiment, an axial gap motor is disclosed as an example of a rotating electrical machine. However, a part of the structure shown in the present embodiment can be applied to other types of rotating electrical machines.
FIG. 1 is a perspective view schematically showing an example of an appearance configuration of an axial gap motor M (hereinafter referred to as a motor M) according to a first embodiment. The motor M includes four housings 10A, 10B, 10C, 10D, three rectangular frames 20A, 20B, 20C, and a rotation shaft S rotatably supported by the housings 10A, 10D.

  The frame 20A is disposed between the housings 10A and 10B. The frame 20B is disposed between the housings 10B and 10C. The frame 20C is disposed between the housings 10C and 10D. The housing 10A has a cylindrical shape with a bottom, and one open end is connected to the frame 20A. The housing 10B is cylindrical, and one end is connected to the frame 20A and the other end is connected to the frame 20B. The housing 10C is cylindrical, and one end is connected to the frame 20B and the other end is connected to the frame 20C. The housing 10D has a bottomed cylindrical shape, and one open end is connected to the frame 20C. A plurality of ventilation holes 13 (14: illustrated in FIG. 3) are formed in the bottom walls of the housings 10A and 10D.

  Through holes H are provided at the four corner portions of the frames 20A to 20C. The motor M can be fixed to the installation location using these through holes H. Although FIG. 1 shows a state in which the through holes H below the frames 20A and 20C are connected to the fixture F at the installation location, the method of installing the motor M is not limited to this.

FIG. 2 is an exploded perspective view showing components of the motor M disposed in the housing.
As shown in FIG. 2, the motor M includes four rotors 1A, 1B, 1C, 1D housed in the housings 10A, 10B, 10C, 10D, respectively. The motor M further includes a stator 2A including a frame 20A, a stator 2B including a frame 20B, and a stator 2C including a frame 20C.

  The rotating shaft S is passed through the centers of the rotors 1A to 1D and the stators 2A to 2C. The rotors 1 </ b> A to 1 </ b> D are each formed in a disc shape and are coaxially attached to the rotary shaft S. The stators 2A to 2C are each formed in an annular shape having an inner hole, disposed around the rotating shaft S, and supported by the frames 20A to 20C, respectively. Thus, along the central axis RX of the rotating shaft S, the rotor 1A, the stator 2A, the rotor 1B, the stator 2B, the rotor 1C, the stator 2C, and the rotor 1D are sequentially arranged via a gap. . That is, the rotors 1A and 1B are disposed on both sides in the axial direction of the stator 2A, and are opposed to the stator 2A with an axial gap. The rotors 1B and 1C are disposed on both sides in the axial direction of the stator 2B, and are opposed to the stator 2B with an axial gap. The rotors 1C and 1D are disposed on both sides in the axial direction of the stator 2C, and are opposed to the stator 2C with an axial gap.

  Each of the rotors 1A to 1D includes a disk-shaped support plate 11 formed of nonmagnetic metal, a plurality of permanent magnets 12 attached to the support plate 11, and the support plate 11 fixed to the permanent magnet 12 And a plurality of combined iron cores 13. The support plate 11 is coaxially attached to the rotating shaft S. The iron core 13 is formed of a powder magnetic core obtained by compressing and hardening a ferromagnetic powder such as iron, for example. The permanent magnet 12 and the iron core 13 have a long shape extending radially about the rotating shaft S. The permanent magnets 12 and the iron cores 13 are alternately arranged in the circumferential direction around the rotating shaft S. Each permanent magnet 12 is magnetized along the circumferential direction of the support plate 11. That is, each permanent magnet 12 is magnetized so that the S pole and the N pole are aligned in the circumferential direction. Further, the permanent magnets 12 adjacent to each other in the circumferential direction are arranged so that the south pole of one permanent magnet 12 faces the south pole of the other permanent magnet 12, and the north pole of one permanent magnet 12 and the other permanent magnet 12. It is arrange | positioned so that the north-pole of the magnet 12 may face.

  In the rotor 1A, the permanent magnet 12 and the iron core 13 are disposed only on one surface of the support plate 11 facing the stator 2A. In the rotors 1B and 1C respectively disposed between two stators, permanent magnets 12 and iron cores 13 are disposed on both sides of a support plate 11. In the rotor 1D, the permanent magnet 12 and the iron core 13 are disposed only on one surface of the support plate 11 facing the stator 2C. Thus, the permanent magnets 12 and the iron cores 13 of the rotors 1A to 1D face the corresponding stators 2A to 2D with a gap. Furthermore, the permanent magnets 12 of the rotors 1A to 1D are arranged such that the magnetic force directions of the permanent magnets positioned on both sides of each of the stators 2A, 2B, 2C are opposite to each other. The configuration of the stators 2A, 2B, and 2C will be described later.

  FIG. 3 is a cross-sectional view of the motor M. As shown in this figure, the rotation shaft S is inserted through the housings 10A to 10D and the frames 20A to 20C, and is disposed coaxially with the housings 10A to 10D. One end of the rotating shaft S in the axial direction is rotatably supported on the bottom wall of the housing 10A via a bearing 12A. One axial end of the rotating shaft S extends outward through the bottom wall of the housing 10A. The other axial end of the rotating shaft S is rotatably supported on the bottom wall of the housing 10D via a bearing 12B. The other end of the rotary shaft S extends outward through the bottom wall of the housing 10D. The rotating shaft S is not limited to a configuration in which both end portions in the axial direction protrude outward from the housing 10D, and it is only necessary that at least one axial end portion protrudes outward.

  The rotating shaft S is inserted through the centers of the rotors 1A to 1D and the stators 2A to 2C. The support plates 11 of the rotors 1A to 1D are coaxially attached to the rotary shaft S, respectively. The stators 2A to 2C are coaxially disposed around the rotating shaft S, respectively. The outer peripheral portions of the stators 2A to 2C are fixed to the housings 10A to 10D via the frames 20A to 20C, respectively. Thus, along the central axis RX of the rotating shaft S, the rotor 1A, the stator 2A, the rotor 1B, the stator 2B, the rotor 1C, the stator 2C, and the rotor 1D are sequentially arranged via a gap. . That is, the rotors 1A and 1B are disposed on both sides in the axial direction of the stator 2A, and are opposed to the stator 2A with an axial gap. The rotors 1B and 1C are disposed on both sides in the axial direction of the stator 2B, and are opposed to the stator 2B with an axial gap. The rotors 1C and 1D are disposed on both sides of the stator 2C in the axial direction, and are opposed to the stator 2C with an axial gap. Thereby, the permanent magnets 12 and the iron cores 13 of the rotors 1A to 1D face the corresponding stators 2A to 2D with an axial gap.

The stator 2 </ b> A includes a disk-shaped first support plate 3 and a second support plate 4. The first support plate 3 and the second support plate 4 are opposed to each other at a predetermined interval, and are arranged on the outer periphery of the first and second support plates 3 and 4 coaxially with the rotary shaft S. The unit is fixed to the frame 20A.
The stator 2 </ b> A includes a plurality of first iron cores 81, a plurality of second iron cores 82, a plurality of third iron cores 83, and a first coil 91 disposed between the first and second support plates 3 and 4. , And a second coil 92. The first iron core 81, the second iron core 82, and the third iron core 83 are sequentially arranged in the radial direction with respect to the rotating shaft S. The first coil 91 is disposed coaxially with the rotating shaft S, and is located between the first iron core 81 and the second iron core 82. The second coil 92 is disposed coaxially with the rotating shaft S and is located between the second iron core 82 and the third iron core 83. The respective end faces of each of the iron cores 81 to 83 are exposed from the first and second support plates 3 and 4 and are opposed to the rotors 1A and 1B.

When current is applied to the first and second coils 91 and 92, magnetic flux is generated around each of the coils 91 and 92, as indicated by the broken lines and arrows. The magnetic flux passing through each of the iron cores 81 to 83 is substantially parallel to the rotating shaft S. These magnetic fluxes interact with the magnet flux of the permanent magnets 12 of the rotors 1A and 1B, and the rotors 1A and 1B and the rotating shaft S rotate.
The stators 2B and 2C are configured in the same manner as the stator 2A. The same magnetic flux is generated also in the stators 2B and 2C. That is, the motor M of this embodiment includes three layers of a structure in which a stator is disposed between two rotors. Three-phase alternating current is supplied to each coil 91 and 92 of the stators 2A to 2C.

Next, the configuration of the stator 2A will be described in more detail. Since the stators 2B and 2C have the same structure as the stator 2A, detailed description thereof is omitted.
FIG. 4 is an exploded perspective view of the stator showing the stator in an exploded manner. As shown in FIG. 4, the stator 2A includes the first support plate 3, the second support plate 4, the frame 20A, the plurality of first iron cores 81, the plurality of second iron cores 82, the plurality of third iron cores 83, A first coil 91 and a second coil 92 are provided. Further, the stator 2A includes first pressing members 5A and 5B, second pressing members 6A and 6B, and third pressing members 7A and 7B. The first to third pressing members are preferably formed of nonmagnetic and nonconductive materials, and can be formed of, for example, various plastics.
Since the first and second support plates 3 and 4 need to be rigid and difficult to deform, they are made of a nonmagnetic metal, for example, a metal plate such as stainless steel (SUS). The first support plate 3 and the second support plate 4 are disposed substantially parallel and coaxially with a gap therebetween. The other components are disposed and supported between the first support plate 3 and the second support plate 4.

  Between the first and second support plates 3 and 4, the plurality of first iron cores 81 are arranged along a first circumference C <b> 1 centered on the central axis RX. The plurality of second iron cores 82 are arranged along a second circumference C2 centered on the central axis RX and smaller than the first circumference C1. The plurality of third iron cores 83 are arranged along a third circumference C3 centered on the central axis RX and smaller than the second circumference C2. The arrangement interval in the circumferential direction of the first iron core 81 may be constant, or at least partially different. The same applies to the second iron core 82 and the third iron core 83.

  The first coil 91 and the second coil 92 are annular, and are arranged concentrically about the central axis RX. The radius of the second coil 92 is smaller than the radius of the first coil 91. The first coil 91 and the second coil 92 are configured by winding an element wire in the circumferential direction around the central axis RX. In each of the first coil 91 and the second coil 92, for example, the strands are flat in the axial direction, and are stacked in multiple stages in the axial direction parallel to the central axis RX and in the radial direction centered on the rotary shaft S.

The second support plate 4 is a circular plate centered on the central axis RX, and the circular central opening 40 for inserting the rotating shaft S and the end of the first iron core 81 are inserted with a gap therebetween. A plurality of exposed first openings 41, and a plurality of second openings 42 which are exposed by inserting the end of the second iron core 82 with a gap respectively, and an end of the third iron core 83 are inserted with a gap respectively And a plurality of third openings 43 to be exposed. The first openings 41 are arranged at intervals along the first circumference C1. The plurality of second openings 42 are arranged at intervals along the second circumference C2 of a smaller radius than the first circumference C1. The plurality of third openings 43 are arranged at intervals along the third circumference C3 of a smaller radius than the second circumference C2.
The second support plate 4 includes a plurality of holes 44 provided along the outer peripheral edge, a plurality of holes 45 provided along the central opening 40, and a slit 46 for drawing out the strands of the second coil 92. , At least two positioning holes 47.

  The second support plate 4 has a high resistance region that regulates or blocks the path of the eddy current loss generated in the support plate. In the present embodiment, the high resistance region has a plurality of slits extending in the radial direction of the second support plate 4. For example, the second support plate 4 includes a first slit 48A extending from each first opening 41 to the outer peripheral edge of the support plate 4, a second slit 48B extending from the second opening 42 to the first opening 41, And a third slit 48C extending from the third opening 43 to the second opening 42. The first, second and third slits 48A, 48B and 48C are provided corresponding to the entire first, second and third openings 41, 42 and 43, respectively. Furthermore, the second support plate 4 has at least one continuous slit 49 extending continuously from the inner peripheral edge to the outer peripheral edge of the second support plate 4. The high-resistance region is not limited to the slit but may be a groove. That is, in place of the first, second and third slits and the continuous slit, a first groove, a second groove, a third groove and a continuous groove may be formed.

  The first support plate 3 has substantially the same shape and configuration as the second support plate 4, and includes a central opening 30, a plurality of first openings 31, a plurality of second openings 32, and a plurality of third openings 33. Have. The first support plate 3 has a plurality of holes 34 provided along the outer peripheral edge, a plurality of holes 35 provided along the central opening 30, and at least two positioning holes 37. Further, the first support plate 3 continuously extends from the inner periphery to the outer periphery of the plurality of first, second, and third slits 38A, 38B, and 38C that constitute the high resistance region, and the first support plate 3. One continuous slit 39 is provided. Instead of the first, second, and third slits 38A, 38B, and 38C and the continuous slit 39, a groove may be used.

The first pressing members 5 </ b> A and 5 </ b> B are annular, for example, whose outer diameter is equal to the outer diameter of each of the support plates 3 and 4. The first pressing members 5A and 5B have a plurality of notches 50 aligned at the same pitch as the plurality of first iron cores 81 on the inner circumferential side. Furthermore, the first pressing members 5A and 5B have a plurality of holes 51 provided between the adjacent notches 50, a plurality of holes 52 provided along the outer peripheral edge, and at least two positioning holes 53. doing. A female screw is provided in the hole 51 of the first pressing member 5A.
The plurality of second pressing members 6 </ b> A and 6 </ b> B are arranged in a ring at the same pitch as the plurality of second iron cores 82. The second pressing members 6A and 6B have holes 61. A female screw is provided in the hole 61 of the second pressing member 6A.
The third pressing members 7A and 7B have, for example, an annular shape in which the inner diameter is equal to the diameter of the central openings 30 and 40 of the support plates 3 and 4. The third pressing members 7A and 7B have a plurality of notches 70 aligned at the same pitch as the plurality of third iron cores 83 on the outer peripheral side. Further, the third pressing members 7A and 7B have a plurality of holes 71 provided between adjacent notches 70 and a plurality of holes 72 provided along the inner peripheral edge. A female screw is provided in the hole 71 of the third pressing member 7A.

The frame 20A has a circular opening 21 having a diameter smaller than the outer diameter of the support plates 3 and 4 and larger than the outer diameter of the first pressing members 5A and 5B. The frame 20 A has an annular step 22 at the periphery of the opening 21. The stepped portion 22 is provided on both the first support plate 3 side and the second support plate 4 side. Furthermore, the frame 20A has a plurality of holes 23 provided in the step portion 22 and at least two positioning holes 24.
The circumferences C1 to C3 described above, the outer circumferences of the support plates 3 and 4, the central openings 30, 40, the opening 21 of the frame 20, the coils 91, 92, etc. are concentrically centered on the central axis RX. .

FIG. 5 is a schematic perspective view showing the first core 81 in an enlarged manner. In the figure, X is an axial direction parallel to the central axis RX, R is a radial direction centered on the central axis RX, and C is a circumferential direction centered on the central axis AX.
The first iron core 81 has an iron core body 81a and a pair of flange portions 81b. The core body 81a is, for example, a rectangular parallelepiped. The pair of flange portions 81b protrude from both side surfaces F11 and F12 in the circumferential direction C of the core body 81a. In the illustrated example, each of the pair of flanges 81b is provided over the entire distance between the ends in the radial direction R of the side surfaces F11 and F12. That is, the width in the radial direction R of the flange portion 81b and the width in the radial direction R of the core body 81a are the same. The width in the circumferential direction C of the flange portion 81b is smaller than the width in the circumferential direction C of the core body 81a.

The first iron core 81 can be composed of a plurality of electromagnetic steel plates 810 stacked in the radial direction R. Each electromagnetic steel sheet 810 has a first portion 810a corresponding to the core body 81a and a pair of second portions 810b corresponding to the respective ridges 81b. The electrical steel sheet 810 is a grain-oriented electrical steel sheet having excellent electromagnetic characteristics in the rolling direction (easy magnetization direction) D. The rolling direction D is, for example, parallel to the axial direction X. In this case, the rolling direction D coincides with the direction of the magnetic flux passing through the first iron core 81 shown in FIG.
The laminated electromagnetic steel plates 810 can be fixed to each other at each flange 81b (each second portion 810b). For example, a plurality of electromagnetic steel plates 810 may be fixed to each other by caulking or hammering at a pair of fixing positions 81c overlapping the respective ridges 81b. When the electromagnetic steel sheet 810 is fixed by the flanges 81b, the core body 81a is not deformed, so that the electromagnetic characteristics of the core body 81a can be maintained well.

The laminated electromagnetic steel plates 810 may be fixed by an adhesive or may be fixed by impregnating the resin and then curing the resin. In these cases, since the electromagnetic steel sheet 810 is not deformed, the electromagnetic characteristics of the first iron core 81 are improved overall. The laminated electromagnetic steel plates 810 can also be fixed by welding. In this case, manufacture of the first iron core 81 is easy.
Note that the rolling direction D of the electromagnetic steel sheet 810 does not have to exactly coincide with the axial direction X, and may intersect the axial direction X at a certain acute angle (for example, an angle of 10 ° or less). In addition, the electromagnetic steel sheet 810 may be a non-oriented electromagnetic steel sheet. Further, the first iron core 81 may be formed of a powder magnetic core obtained by compressing and hardening a ferromagnetic powder.
As shown in FIG. 4, the second iron core 82 and the third iron core 83, like the first iron core 81 described above, have rectangular solid core bodies 82a, 83a and a pair of ridges projecting from both sides of the iron core body. And 82b and 83b. The 2nd iron core 82 and the 3rd iron core 83 can each be comprised with the laminated body of an electromagnetic steel plate. The first, second and third iron cores 82, 83 and 84 are electrically insulated by coating the entire surface with a resin or the like.

6 is a plan view of the stator shown with a part broken away, FIG. 7 is a cross-sectional view of the stator along the line BB in FIG. 6, and FIG. 8 is along the line CC in FIG. It is a cross-sectional view of the stator.
As shown in FIGS. 6 and 7, the outer peripheral portions of the first support plate 3 and the second support plate 4 are fixed to each other with the inner peripheral side step portion 22 of the frame 20 </ b> A interposed therebetween. Here, a plurality of positions on the outer peripheral portion of the first support plate 3 and the second support plate 4 are stepped portions 22 by the bolt B1 inserted into the hole 44 of the first support plate 3 and the nut N1 screwed into the bolt B1. Are tightened. Further, a plurality of locations on the inner peripheral portions of the first support plate 3 and the second support plate 4 are fixed to each other by bolts B2 and nuts N2. Thereby, the 1st support plate 3 and the 2nd support plate 4 have mutually opposed in parallel with the predetermined space | interval. The first opening 31, the second opening 32, and the third opening 33 of the first support plate 3 face the first opening 41, the second opening 42, and the third opening 43 of the second support plate 4, respectively.

  The plurality of first iron cores 81 disposed between the first support plate 3 and the second support plate 4 have both ends of the iron core body 81a at the first opening 31 of the first support plate 3 and the second support plate 4 respectively. The first opening 41 is inserted through the first opening 41 and exposed in the opening. Thereby, both end surfaces of the iron core body 81a are exposed on the surface of the first support plate 3 and the surface of the second support plate 4, respectively, and are positioned substantially flush with these surfaces. Each of the plurality of second iron cores 82 is inserted into the second opening 32 of the first support plate 3 and the second opening 42 of the second support plate 4 with both ends of the iron core main body 82a spaced apart and exposed in the openings There is. Thereby, both end surfaces of the iron core main body 82a are respectively exposed on the surface of the first support plate 3 and the surface of the second support plate 4, and are positioned substantially flush with these surfaces. Furthermore, the plurality of third iron cores 83 are inserted into the second opening 32 of the first support plate 3 and the second openings 42 of the second support plate 4 with both ends of the iron core main body 83a exposed and exposed in the openings doing. Thereby, both end surfaces of the iron core main body 83a are respectively exposed on the surface of the first support plate 3 and the surface of the second support plate 4, and are substantially flush with these surfaces.

  The first pressing members 5A and 5B are disposed between the first support plate 3 and the second support plate 4 in a state of facing each other. The aforementioned bolt B1 is inserted through the hole 32 of the first pressing member 5A and the hole 52 of the first pressing member 5B. Thereby, the first pressing members 5A and 5B are positioned with respect to the first support plate 3 and the second support plate 4. The notch 50 of the first pressing member 5A and the notch 50 of the first pressing member 5B are opposed to each other, and are opposed to the first opening 31 of the first support plate 3 and the first opening 41 of the second support plate 4, respectively. doing. Further, as shown in FIG. 8, the first pressing member 5A and the second pressing member 5B are fastened to each other by screws S1 screwed into the holes 51 of the pressing members 5A and 5B, respectively.

As shown in FIGS. 6 and 8, the second pressing members 6A and 6B are disposed between the first support plate 3 and the second support plate 4 in a state of facing each other. The second pressing members 6 </ b> A and 6 </ b> B are disposed between the two adjacent second iron cores 82. The second pressing members 6A and 6B are fastened to each other by a screw S2 that is inserted into the hole 61 of the second pressing member 6B and screwed into the hole 61 of the second pressing member 6A.
The third pressing members 7A and 7B are disposed between the first support plate 3 and the second support plate 4 in a state of facing each other. The aforementioned bolt B2 (see FIG. 7) is inserted through the hole 72 of the third pressing member 7A and the hole 72 of the third pressing member 7B. Thus, the third pressing members 7A and 7B are positioned at positions around the central openings 30 and 40 with respect to the first support plate 3 and the second support plate 4. The notch 70 of the third pressing member 7A and the notch 70 of the third pressing member 7B face each other, and face the third opening 33 of the first support plate 3 and the third opening 43 of the second support plate 4, respectively. doing. Further, the third pressing member 7A and the third pressing member 7B are mutually fastened by a screw S3 screwed into the hole 71 of the pressing members 7A and 7B.

FIG. 9 is a perspective view of the stator with the second support plate 4 omitted, and FIG. 10 is a cross-sectional view of the first core portion taken along line D-D in FIG.
As shown in FIG. 9, the iron core bodies 81a of the plurality of first iron cores 81 are respectively fitted into the notches 50 of the first pressing members 5A and 5B. As shown in FIGS. 9 and 10, the pair of flange portions 81b of the first iron core 81 are sandwiched between the first pressing member 5A and the first pressing member 5B, respectively. As described above, the plurality of first iron cores 81 are respectively pressed by the first pressing members 5A and 5B, and the movement in the circumferential direction and the movement in the axial direction are restricted.

As shown in FIG. 9, the core bodies 82a of the plurality of second iron cores 82 are sandwiched between second pressing members 6A and 6B arranged on both sides in the circumferential direction. Further, each flange portion 82b of the second iron core 82 is sandwiched between the second pressing member 6A and the second pressing member 6B. As described above, the plurality of first iron cores 82 are respectively pressed by the first pressing members 6A and 6B, and the movement in the circumferential direction and the movement in the axial direction are restricted.
The iron core bodies 83a of the plurality of third iron cores 83 are respectively fitted into the notches 70 of the third pressing members 7A and 7B. The pair of flanges 83b of the third iron core 83 are respectively sandwiched between the third pressing member 7A and the third pressing member 7B. As described above, the plurality of third iron cores 83 are respectively pressed by the third pressing members 7A and 7B, and the movement in the circumferential direction and the movement in the axial direction are restricted.
The first iron core 81, the second iron core 82, and the third iron core 83, which are positioned and fixed by the first to third pressing members as described above, have circumferential directions about the central axis RX, as shown in FIG. For example, they are offset from each other by an angle corresponding to 120 ° in electrical angle.

As shown in FIGS. 6 and 9, the first coil 91 is disposed coaxially with the first support plate 3 and the second support plate 4 and located between the first iron core 81 and the second iron core 82. There is. The first coil 91 is held between the first support plate 3 and the second support plate 4. The pair of lead end portions 91a of the first coil 91 are drawn out of the frame 20A through the slits 46 of the first support plate 3 and the holes of the frame 20A.
The second coil 92 is coaxially disposed with the first support plate 3 and the second support plate 4, and is located between the second iron core 82 and the third iron core 83. The second coil 92 is held between the first support plate 3 and the second support plate. The pair of lead ends 92a of the second coil 92 are drawn out of the frame 20A through the slits 46 of the second support plate 4 and the holes of the frame 20A.
The lead end portions 91a and 92a drawn outward are coupled to the lead end portions drawn from the other stators (2B and 2C) and Y-connected.

  The stator 2A having the above-described configuration may be filled with, for example, a thermosetting resin and the surface of each constituent member may be molded with the resin. For example, in a vacuum atmosphere, resin is filled between the first support plate 3 and the second support plate 4 from the vicinity of the central openings 30 and 40 of the stator 2A. The filled resin fills a gap between adjacent elements inside the stator 2A. Before the resin is completely cured, it is preferable to rotate the stator 2 </ b> A while standing in the direction of gravity. Thereby, the resin on the outer surface and the inside of the stator 2A can flow and be equalized, and excess resin can be dropped.

According to the motor M having the stators 2A, 2B, 2C configured as described above, despite the fact that the support plates 3, 4 of the stator are formed of metal plates with high rigidity, these support plates By providing the first, second and third slits 48A, 48B and 48C which function as high resistance regions in 3 and 4 and continuous slits 49, paths of eddy current loss generated in the support plates 3 and 4 during operation can be obtained. It cuts off by the slit of, and generation | occurrence | production of an eddy current loss can be suppressed. This makes it possible to reduce the loss and improve the output of the motor M.
As described above, the high resistance region may be constituted by a groove instead of the slit. That is, the support plate may be provided with the first groove, the second groove, the third groove, and the continuous groove. When the groove is used, the mechanical strength of the support plate can be increased as compared with the case where the slit is provided.

An application example of the motor M according to the present embodiment will be described. The motor M can be applied to the main motor of the railway vehicle 100 as shown in FIG. The railway vehicle 100 includes a vehicle body 110, a carriage 120 disposed below the vehicle body 110, a driving device 130, and a pantograph 140 disposed on the upper portion of the vehicle body 110. In the illustrated example, two carriages 120 and two pantographs 140 are provided for the vehicle body 110, and two drive devices 130 are provided for each carriage 120.
The carriage 120 includes a carriage frame 121, a plurality of wheels 122 attached to the carriage frame 121, and an air spring 123 disposed between the carriage frame 121 and the vehicle body 110. The drive device 130 includes a motor M as a main motor and a control device that controls the motor M. Both axial ends of the rotating shaft S of the motor M are directly connected to the wheels 122, respectively. The pantograph 140 is in contact with the overhead line 150. The electric power taken in from the overhead wire 150 via the pantograph 140 is supplied to the drive device 130, and the electric power rotates the motor M. By using such a motor M for directly driving the wheel 12, the transmission loss of the driving force is reduced, the energy efficiency is improved, and the vehicle can be miniaturized as compared with the case where the transmission is used. Become.
The motor M according to the present embodiment can be applied not only to railway vehicles but also to various devices that require rotational power.

Next, a stator of a rotating electrical machine according to another embodiment will be described. In the other embodiments described below, the same parts as those in the first embodiment described above are denoted by the same reference numerals, and the detailed description thereof is omitted or simplified. The details will be described focusing on the different parts.
Second Embodiment
FIG. 11 is a plan view showing the stator of the rotary electric machine according to the second embodiment with a part broken.
In the first embodiment described above, the plurality of slits constituting the high resistance region extend in the radial direction of the support plate, whereas in the second embodiment, the plurality of slits form the periphery of the support plate It extends in the direction.

  In detail, as shown in FIG. 11, the second support plate 4 of the stator 2A has a high resistance region which restricts or blocks the path of the eddy current loss generated in the support plate. In the present embodiment, the high resistance region has a plurality of slits extending in the circumferential direction of the second support plate 4. For example, the second support plate 4 includes a plurality of first slits 48A each extending along the circumferential direction from the first opening 41 to the adjacent first opening 41, and a second opening 42 adjacent to the second opening 42, respectively. And a plurality of second slits 48B extending along the circumferential direction up to the circumferential direction, and a plurality of third slits 48C extending along the circumferential direction from the third opening 43 to the adjacent third opening 43, respectively There is. As described above, each first slit 48A is provided between two adjacent first openings 41, that is, between two first iron cores 81 engaged with the first openings 41, respectively. Each second slit 48B is provided between two adjacent second openings 42, that is, between two second iron cores 82 engaged with the second openings 42, respectively. Each third slit 48C is provided between two adjacent third openings 43, that is, between two third iron cores 81 engaged with the third openings 43, respectively. Furthermore, the high resistance area of the second support plate 4 has at least one continuous slit 49 continuously extending from the inner peripheral edge to the outer peripheral edge of the second support plate 4.

  In the present embodiment, the first, second, and third slits 48A, 48B, and 48C are provided between all the first openings, between all the second openings, and between all the third openings, Not limited to this, one or more of the first, second and third slits 48A, 48B and 48C may be omitted. Further, the high resistance region is not limited to the slit but may be a groove. That is, in place of the first, second and third slits and the continuous slit, a first groove, a second groove, a third groove and a continuous groove may be formed.

The first support plate 3 of the stator 2A has substantially the same shape and configuration as the second support plate 4 described above. The other configuration of the stator 2A is the same as that of the stator according to the first embodiment described above.
According to the second embodiment configured as described above, by providing a plurality of slits extending in the circumferential direction in the support plate, the path of eddy current loss generated in the metal support plate is blocked. Generation of eddy current loss can be suppressed. Thereby, loss reduction and output improvement of a rotary electric machine can be aimed at.

Third Embodiment
FIG. 12 is a plan view showing a partially broken stator of a rotary electric machine according to a third embodiment, and FIG. 13 is a cross-sectional view of the stator.
According to this embodiment, the first support plate 3 and the second support plate 4 of the stator 2A are each formed of a laminated plate in which a plurality of, for example, three plates are laminated. As shown in FIG. 13, the first support plate 3 includes a first plate 55A, a second plate 55B, and a third plate 55C, and is configured by a laminated plate in which these plates are laminated in order. Each of the first plate 55A, the second plate 55B, and the third plate 55C uses a nonmagnetic metal plate such as stainless steel. Similarly, the second support plate 4 has a first plate 57A, a second plate 57B, and a third plate 57C, and is formed of a laminated plate in which these plates are laminated in order. In the present embodiment, each of the first plate 57A, the second plate 57B, and the third plate 57C uses a nonmagnetic metal plate such as stainless steel. The first support plate 3 and the second support plate 4 are disposed such that the third plate 55c and the third plate 57C face each other. Thereby, the first plate 55A of the first support plate 3 and the first plate 57A of the second support plate 4 are located on the outer surface side of the stator 2.
An insulating layer (not shown), for example, a resin coating, is provided between adjacent plates, that is, between the first plate 57A and the second plate 57B, and between the second plate 57B and the third plate 57C. Electrically isolated.

  The configuration of the second support plate 4 will be described as a representative. As shown in FIGS. 12 and 13, the second support plate 4 has a plurality of first openings 41, a plurality of second openings 42, and a plurality of openings 43 which are respectively formed through. One end of the first iron core 81 is inserted into each first opening 41 with a gap and exposed. One end of the second iron core 82 is inserted into each second opening 42 with a gap and exposed. One end portion of the third iron core 83 is inserted into each third opening 43 with a gap and exposed.

  As shown in FIG. 12, the first plate 57A of the second support plate 4 includes a plurality of first slits 48A, a plurality of second slits 48B, a plurality of third slits 48C, and at least one constituting a high resistance region. A continuous groove 49 is provided. The first slit 48A extends from the first opening 41 to the outer peripheral edge of the first plate 57A. The second slit 48 B extends from the second opening 42 to the first opening 41. The third slit 48C extends from the third opening 43 to the second opening 42. The first, second, and third slits 48A, 48B, and 48C are provided corresponding to the first, second, and third openings 41, 42, and 43 of the entire set. At least one continuous slit 49 extends continuously from the inner peripheral edge to the outer peripheral edge of the first plate 57A.

  The second plate 57B of the second support plate 4 has a plurality of fourth slits 48D, a plurality of fifth slits 48E, and a plurality of sixth slits 48F that constitute a high resistance region. As indicated by a broken line in FIG. 12, each fourth slit 48D extends from the first opening 41 to the outer peripheral edge of the second plate 57B. The fifth slit 48E extends from the second opening 42 to the first opening 41. The sixth slit 48F extends from the third opening 43 to the second opening 42. The fourth, fifth, and sixth slits 48D, 48E, and 48F are provided corresponding to the first, second, and third openings 41, 42, and 43 of the entire set. The fourth slits 48D, the fifth slits 48E, and the sixth slits 48F are offset in the circumferential direction of the support plate 4 with respect to the first slits 48A, the second slits 48B, and the third slits 48C of the first plate 57A. It is provided at the position. That is, the fourth slit 48D, the fifth slit 48E, and the sixth slit 48F are provided at positions that do not overlap the first slit 48A, the second slit 48B, and the third slit 48C.

  The third plate 57C of the second support plate 4 has a seventh slit (not shown) constituting a high resistance area, a plurality of eighth slits, and a plurality of ninth slits. Each seventh slit extends from the first opening 41 to the outer peripheral edge of the third plate 57C. The eighth slit extends from the second opening 42 to the first opening 41. The ninth slit extends from the third opening 43 to the second opening 42. The seventh, eighth and ninth slits are provided corresponding to the first, second and third openings 41, 42 and 43 of the entire set. The seventh slit, the eighth slit, and the ninth slit correspond to the first slit 48A, the second slit 48B, and the third slit 48C of the first plate 57A, and the fourth slit 48D of the second plate 57B, It is provided at a position shifted in the circumferential direction of the support plate 4 with respect to the fifth slit 48E and the sixth slit 48F. That is, the seventh slit, the eighth slit, and the ninth slit are provided at positions that do not overlap with the first to sixth slits.

As described above, the second support plate 4 is configured by laminating the first plate 57A, the second plate 57B, and the third plate 57D provided with a plurality of slits, with the slit positions shifted by a certain distance. There is. The first support plate 3 of the stator 2A has substantially the same shape and configuration as the second support plate 4 described above. The other configuration of the stator 2A is the same as that of the stator according to the first embodiment described above.
According to the third embodiment configured as described above, by providing a plurality of slits functioning as a high resistance region in the stator support plate, a path of eddy current loss generated in the metal support plate. To reduce the occurrence of eddy current loss. By this, loss reduction and output improvement of the rotating electrical machine are achieved. Further, according to the present embodiment, the mechanical strength of the support plate is improved by forming the support plate by laminating a plurality of plates each provided with a plurality of slits while shifting the slit position.
In the present embodiment, the high resistance region is not limited to the slit but may be a groove. That is, in place of the first, second, third, fourth and fifth slits and the continuous slit, the first groove, the second groove, the third groove, the fourth groove, the fifth groove and the continuous groove are formed. It is also good. The support plate is not limited to three plates, and may be formed by stacking two or three or more plates.

Fourth Embodiment
FIG. 14 is a cross-sectional view of a stator of a rotary electric machine according to a fourth embodiment.
As in the third embodiment described above, the first support plate 3 and the second support plate 4 of the stator 2A are each a plurality of, for example, three first plates, second plates, and third plates stacked. It is formed by the laminated board. As shown in FIG. 14, the first plate has a plurality of first slits 48A, a plurality of second slits 48B, a plurality of third slits 48C, and at least one continuous groove 49 that constitute a high resistance region. There is. The first slit 48A extends from the first opening 41 to the outer peripheral edge of the first plate 57A. The second slit 48 B extends from the second opening 42 to the first opening 41. The third slit 48C extends from the third opening 43 to the second opening 42. The first, second and third slits 48A, 48B and 48C are provided corresponding to the entire first, second and third openings 41, 42 and 43, respectively. The at least one continuous slit 49 extends continuously from the inner peripheral edge to the outer peripheral edge of the first plate 57A.

  The second plate of the second support plate 4 has a plurality of fourth slits 48D, a plurality of fifth slits 48E, and a plurality of sixth slits 48F that constitute a high resistance region. As indicated by broken lines in FIG. 14, according to the present embodiment, the fourth to sixth slits extend in the circumferential direction of the first support plate 4. The plurality of fourth slits 48D extend in the circumferential direction from the first opening 41 to the adjacent first opening 41, respectively. The plurality of fifth slits 48E extend in the circumferential direction from the second opening 42 to the adjacent second opening 42, respectively. The plurality of sixth slits 48F extend in the circumferential direction from the third opening 43 to the adjacent third opening 43, respectively.

  In the present embodiment, the fourth, fifth, and sixth slits 48D, 48E, and 48F are provided between all the first openings, between all the second openings, and between all the third openings, respectively. The number of the fourth, fifth, and sixth slits 48D, 48E, and 48F may be one or more. Further, the high resistance region is not limited to the slit but may be a groove. That is, the fourth, fifth, sixth, and continuous grooves may be formed instead of the fourth, fifth, and sixth slits and the continuous slit.

The third plate of the second support plate 4 has a plurality of seventh slits, a plurality of eighth slits, and a plurality of ninth slits (not shown) that constitute the high resistance region. Each seventh slit extends from the first opening 41 to the outer peripheral edge of the third plate 57C. The eighth slit extends from the second opening 42 to the first opening 41. The ninth slit extends from the third opening 43 to the second opening 42. The seventh, eighth and ninth slits are provided corresponding to the first, second and third openings 41, 42 and 43 of the entire set. The seventh slit, the eighth slit, and the ninth slit are provided at positions shifted in the circumferential direction of the support plate 4 with respect to the first slit 48A, the second slit 48B, and the third slit 48C of the first plate. It is done. That is, the seventh slit, the eighth slit, and the ninth slit are provided at positions not overlapping the first to third slits.
The seventh to ninth slits are not limited to the radial direction of the support plate, and may be formed to extend in the circumferential direction. In this case, the seventh to ninth slits are provided at positions that do not overlap with the fourth to sixth slits.

The other configuration of the stator 2A is the same as that of the third embodiment described above.
According to the fourth embodiment configured as described above, by providing a plurality of slits functioning as a high resistance region in the stator support plate, a path of eddy current loss generated in the metal support plate. To reduce the occurrence of eddy current loss. By this, loss reduction and output improvement of the rotating electrical machine are achieved. Further, according to the present embodiment, the mechanical strength of the support plate is improved by forming the support plate by laminating a plurality of plates each provided with a plurality of slits while shifting the slit position.

Fifth Embodiment
FIG. 15 is a cross-sectional view of a stator of a rotary electric machine according to a fourth embodiment.
According to this embodiment, the first support plate 3 and the second support plate 4 of the stator 2A are each formed of a laminated plate in which a plurality of, for example, three plates are laminated. As shown in FIG. 15, the first support plate 3 includes a first plate 55A, a second plate 55B, and a third plate 55C, and is configured by a laminated plate in which these plates are laminated in order. Both the first plate 55A and the third plate 55C are made of a non-magnetic metal plate such as stainless steel. The second plate 55B uses a plate formed of a nonmagnetic, nonconductive material such as fiber reinforced plastic (FRP) or ceramic. In this way, the first support plate 3 is configured such that the nonmagnetic and nonconductive second plate 55B is sandwiched between the metal first plate 55A and the third plate 55C. The second plate 55 B constitutes a high resistance area of the first support plate 3. That is, the first, second, and third openings 31, 32, and 33 are formed through the first support plate 3, respectively. The second plate 55B functioning as a high resistance region is formed between the outer periphery of the first support plate 3 and the first opening 31, between the first opening 31 and the second opening 32, and between the second opening 32 and the second opening. It extends to all between the third opening 33 and the third opening 33 and the inner peripheral edge.

Similarly, the second support plate 4 has a first plate 57A, a second plate 57B, and a third plate 57C, and is formed of a laminated plate in which these plates are laminated in order. Each of the first plate 57A and the third plate 57C uses a metal plate such as stainless steel. As the second plate 57B, a plate formed of a nonmagnetic and nonconductive material such as FRP or ceramic is used. As described above, the second support plate 4 is configured such that the nonmagnetic, nonconductive second plate 57B is sandwiched between the metal first plate 57A and the third plate 57C. The second plate 55 B constitutes a high resistance area of the second support plate 4. That is, the first, second, and third openings 41, 42, and 43 are formed through the second support plate 4, respectively. The second plate 55B functioning as a high resistance region is formed between the outer peripheral edge of the second support plate 4 and the first opening 41, between the first opening 41 and the second opening 42, and between the second opening 42 and the second opening 42. It extends between the three openings 43 and between the third opening 43 and the inner peripheral edge.
The first support plate 3 and the second support plate 4 are disposed such that the third plate 55c and the third plate 57C face each other. Thereby, the first plate 55A of the first support plate 3 and the first plate 57A of the second support plate 4 are located on the outer surface side of the stator 2.
In the present embodiment, the other configuration of the stator 2A is the same as that of the stator in the first embodiment described above. In the present embodiment, the support plate is not limited to three plates, and may be configured by laminating two or three or more plates. However, at least one nonmagnetic, nonconductive plate is used.

  According to the fifth embodiment configured as described above, the inside of the support plate of the stator, that is, the second plates 55B and 57B are formed of a nonmagnetic and nonconductive material such as FRP or ceramic. The second plate can function as a high resistance region located between the plurality of first to third openings. Therefore, the path of eddy current loss generated inside the support plate can be shielded by the second plate, and generation of eddy current loss can be suppressed. Thereby, loss reduction and output improvement of a rotary electric machine can be aimed at. Furthermore, according to this embodiment, the support plate secures the rigidity of the support plate by sandwiching the non-magnetic, non-conductive second plate between the metal first plate and the third plate from the outside. can do.

(Sixth embodiment)
FIG. 16 is a plan view showing a partially broken stator of the rotating electric machine according to the sixth embodiment.
The configuration of the second support plate 4 of the stator 2A will be described as a representative. As shown in FIG. 16, according to the present embodiment, the second support plate 4 has a plurality of first openings 41, a plurality of second openings 42, and a plurality of openings 43 that are formed to penetrate each other. . One end of the first iron core 81 is inserted into each first opening 41 with a gap and exposed. One end of the second iron core 82 is inserted into each second opening 42 with a gap and exposed. One end portion of the third iron core 83 is inserted into each third opening 43 with a gap and exposed.

Similar to the first embodiment, the high resistance region of the second support plate 4 includes a plurality of first slits 48A, a plurality of second slits 48B, and a plurality of third slits 48C. The first slit 48A extends from the first opening 41 to the outer peripheral edge of the first plate 57A. The second slit 48 B extends from the second opening 42 to the first opening 41. The third slit 48C extends from the third opening 43 to the second opening 42. According to the sixth embodiment, the high resistance region further includes a fourth slit 48D extending from the third opening 43 to the inner peripheral edge of the support plate 4. Accordingly, the second support plate 4 is divided into a plurality of divided plates aligned in the circumferential direction by the first to fourth slits 48A to 48D.
The first support plate 4 of the stator 2A is configured in substantially the same manner as the second support plate 4 described above.

A ring-shaped inner peripheral frame 97 is sandwiched between the inner peripheral portion of the first support plate 3 and the inner peripheral portion of the second support plate 4 and is substantially aligned with the inner peripheral edge of the support plate. In the present embodiment, the inner circumferential frame 97 is sandwiched between the pressing members 7A and 7B.
Each of the divided plates of the second support plate 4 divided by the first to fourth slits 48A to 48D is fixed to the outer frame 20A by the bolt B1 at the outer periphery, and the inner frame by the bolt B2 at the inner periphery. It is fixed to 97. Thereby, the plurality of dividing plates are held by one supporting plate without being disassembled. The first support plate 5 is also fixedly held to the frame 20A and the inner circumferential frame 97 as described above.
The other configuration of the stator 2A is the same as that of the stator according to the first embodiment described above.
According to the sixth embodiment configured as described above, the supporting plate is provided with the first to fourth slits extending in the circumferential direction, and the supporting plate is divided into a plurality of divided plates to obtain a metal. The path of the eddy current loss generated in the support plate made of aluminum can be shut off, and the generation of the eddy current loss can be suppressed. Thereby, loss reduction and output improvement of a rotary electric machine can be aimed at.

Although several embodiments of the present invention have been described, these embodiments are presented by way of example and are not intended to limit the scope of the invention. These novel embodiments can be implemented in various other forms, and various omissions, substitutions, and modifications can be made without departing from the scope of the invention. These embodiments and modifications thereof are included in the scope and gist of the invention, and are included in the invention described in the claims and the equivalents thereof.
For example, in the embodiment described above, a three-phase AC motor M having four rotors 1A to 1D and three stators 2A to 2C is disclosed, but the motor M has a larger number of stators and rotors. It may be provided or may have a smaller number of stators and rotors.

M: motor, S: rotating shaft, AX: central axis, 1A to 1D: rotor,
2A to 2C ... stator, 3 ... first support plate, 4 ... second support plate,
5A, 5B ... first pressing member, 6A, 6B ... second pressing member,
7A, 7B ... third pressing member, 10A to 10D ... housing,
20A to 20C ... frame, 31 to 34, 41 to 43 ... opening
48A: first slit, 48B: second slit, 48C: third slit,
49: continuous slit, 55A, 57A: first plate, 55B, 57B: second plate,
55C, 57C ... 3rd board

Claims (10)

Stator of a rotating electric machine,
A support plate formed of a nonmagnetic metal, a coil supported by the support plate, and a plurality of iron cores supported by the support plate, the support plate being located between the plurality of iron cores Stator having a high resistance area. The support plate is a support plate having a rigid structure between an inner peripheral edge and an outer peripheral edge,
The stator includes a plurality of first iron cores provided between the outer peripheral edge of the support plate and the coil, and a plurality of second iron cores provided between the inner peripheral edge of the support plate and the coil. , And
The support plate includes a plurality of first openings from which the plurality of first iron cores are respectively exposed, a plurality of second openings from which the plurality of second iron cores are respectively exposed, and the plurality of first openings and second openings. The stator according to claim 1, further comprising: the high resistance region located between the plurality of first openings and the outer peripheral edge.   The high resistance region includes a plurality of first slits or grooves formed in the support plate and extending from the first opening to the outer peripheral edge, and a plurality of holes formed in the support plate and extending from the second opening to the first opening. The stator according to claim 2, further comprising: a second slit or groove; and at least one continuous slit or continuous groove formed in the support plate and continuously extending from the inner peripheral edge to the outer peripheral edge.   The high resistance region includes a plurality of first slits or grooves formed in the support plate and extending between two adjacent first openings, and a plurality of slits formed in the support plate and extending between two adjacent second openings. The stator according to claim 2, further comprising: a second slit or groove formed on the support plate and extending continuously from the inner peripheral edge to the outer peripheral edge. The support plate includes a first plate formed of nonmagnetic metal, and a second plate formed of nonmagnetic metal and stacked on the first plate.
The high resistance region is formed in the second plate, respectively, with the first slit or the groove and the second slit or the groove formed in the first plate, and the first slit or the groove and the second slit or the second slit or the groove The stator according to any one of claims 2 to 4, further comprising: a plurality of slits or grooves disposed at circumferentially offset positions with respect to the grooves. It further comprises a second coil disposed between the second iron core and the inner peripheral edge, and a plurality of third iron cores provided between the inner peripheral edge of the support plate and the second coil,
The support plate has a plurality of third openings in which the plurality of third iron cores are exposed,
6. The stator according to claim 2, wherein the high-resistance region has a plurality of third slits or grooves formed in the support plate and extending from the third opening to the second opening. .   The stator according to claim 6, wherein the high resistance region includes a plurality of fourth slits or grooves each extending from the third opening to the inner peripheral edge of the support plate.   The support plate includes a first plate formed of a nonmagnetic metal and a second plate formed of a nonmagnetic and nonconductive material and stacked on the first plate, and the second plate The stator according to claim 1, which constitutes the high resistance region. With a rotating shaft,
A rotor mounted on the rotating shaft;
The stator according to claim 1, which faces the rotor with a gap in an axial direction parallel to the rotating shaft;
Electric rotating machine equipped with A rotating electrical machine according to claim 9;
Wheels provided on both sides of a rotating shaft of the rotating electrical machine;
A vehicle comprising:

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