JP2013162617A - Rotor of rotary electric machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a rotor of a rotary electric machine that can reduce the demagnetizing field at a corner of a permanent magnet buried in a rotor core.SOLUTION: A rotor 30 comprises: a toric rotor core 31 including a plurality of magnet holding holes 32 arranged in a circumferential direction spaced a prescribed distance apart; and a plurality of permanent magnets 33 which form a plurality of magnetic poles buried in the magnet holding holes 32 such that polarity changes alternately in the circumferential direction. Each of the magnet holding holes 32 includes a non-magnetic material part 34a at a circumferential direction opposite side to the magnetic pole center line L1 of a permanent magnet 33 buried in its magnet holding hole 32. The rotor core 31 includes a projection part 35 which projects from an outer diameter side wall surface 32a of the magnet holding hole 32 to the non-magnetic material part 34a, defined by a line passing through at least three points including a first bending point P1, a second bending point P2, and a third bending point P3.

Description

  The present invention relates to a rotor of a rotating electrical machine that is mounted on a vehicle such as a hybrid vehicle or an electric vehicle and used as an electric motor or a generator.

  Conventionally, a rotating electrical machine disclosed in Patent Document 1 is known as a rotating electrical machine having a rotor in which a plurality of permanent magnets are embedded in an annular rotor core. This type of rotating electrical machine is a rotor core formed by laminating a plurality of annular steel plates in the axial direction and fitted and fixed to the outer periphery of the rotating shaft, and embedded in the outer peripheral portion of the rotor core at a predetermined distance in the circumferential direction. And a rotor having a plurality of permanent magnets that form a plurality of magnetic poles so that the polarities are alternately different in the circumferential direction.

  A plurality of magnet holding holes penetrating in the axial direction and arranged at a predetermined distance in the circumferential direction are provided on the outer peripheral portion of the rotor core, and permanent magnets are embedded in the respective magnet holding holes. The permanent magnet embedded in each magnet holding hole is fixed to the rotor core by an adhesive or resin filled in each magnet holding hole.

  By embedding the permanent magnet in the rotor core in this way, reluctance torque due to the anisotropy of the magnetic resistance of the rotor core can be utilized. In other words, the reluctance torque generated only by the attractive force between the pole due to the rotating magnetic field of the stator and the salient pole of the rotor can be utilized.

JP 2007-236020 A

  By the way, the magnet has a coercive force for maintaining the magnetic force. However, when a demagnetizing field is applied to the magnet by an external magnetic field and the coercive force of the magnet is exceeded, demagnetization occurs, the magnetic flux density of the magnet decreases, and the performance of the magnet decreases. Note that the demagnetizing field is usually higher in a portion closer to the outer peripheral surface of the rotor and the permanent magnet.

  This invention is made | formed in view of the said situation, and makes it the subject which should be solved to provide the rotor of the rotary electric machine which can reduce the demagnetizing field of the corner | angular part of the permanent magnet embedded at the rotor core. .

  The present invention, which has been made to solve the above problems, includes an annular rotor core (31) having a plurality of magnet holding holes (32) arranged at a predetermined distance in the circumferential direction, and the magnet holding holes (32). In the rotor (30, 30A to 30D) of the rotating electrical machine (10), including a plurality of permanent magnets (33) that are embedded in a magnetic pole and form a plurality of magnetic poles so that the polarities are alternately different in the circumferential direction, The holding hole (32) has a nonmagnetic material portion (34a) on the opposite side in the circumferential direction from the magnetic pole center line (L1) of the permanent magnet (33) embedded in the magnet holding hole (32), and the rotor core (31) is an outer-diameter side wall surface (32a) of the magnet holding hole (32) that extends toward the outer-diameter side as it goes away from the magnetic pole center line (L1) in the circumferential direction, and the outermost-diameter side of the permanent magnet (33). Corner (33a) and rotor rotation center (O The first bending point (P1) located on the intersection where the straight line (L2) passing through the rotor intersects, and the rotor rotation center (O) passing through the outermost diameter side corner (33a) of the permanent magnet (33). The second bending point (P2) located on the inner diameter side of the concentric circle (S1) and the outer diameter side of the concentric circle (S2) of the rotor rotation center (O) passing through the second bending point (P2). It is defined by a line passing through at least three points including the third bending point (P3) positioned, and protrudes from the outer diameter side wall surface (32a) of the magnet holding hole (32) to the nonmagnetic material portion (34a). It has a projection (35, 35A, 35B).

  According to the present invention, the rotor core is defined by a line passing through at least three points including the first bending point, the second bending point, and the third bending point, and from the outer diameter side wall surface of the magnet holding hole, It has a protrusion that protrudes from a nonmagnetic material provided on the opposite side of the magnetic pole center line in the circumferential direction. Therefore, the demagnetizing field from the stator side toward the outermost diameter side corner portion of the permanent magnet can be released in the direction of the protrusion, so that the demagnetizing field at the outermost diameter side corner portion of the permanent magnet can be reduced. Thereby, since the fall of the magnetic flux density of the permanent magnet by the increase in a demagnetizing field can be avoided, a performance fall can be suppressed.

  As the permanent magnet used in the present invention, a permanent magnet having two sets of two sides facing each other in a cross-sectional shape perpendicular to the rotor rotation axis can be suitably used. Specifically, it is a rectangle such as a rectangle, but the corner may be an arc-shaped chamfer or a planar chamfer, or may not be. Moreover, as a nonmagnetic material of the nonmagnetic material part in this invention, it can be set as air or resin, for example.

  As a preferred embodiment of the present invention, a diffusion magnet can be adopted as the permanent magnet. The diffusion magnet here is a magnet to which heavy rare earth (Dy (dysprosium), Tb (terbium)) that increases the coercive force is added from the magnet surface, and the coercive force is distributed in the radial direction from the center of the magnet (surface A magnet with a higher coercivity. In this diffusion magnet, when the corner portion is lost, a portion having a weak coercive force is exposed on the surface. Even when the corner portion of the magnet is missing, the provision of the above-mentioned projection portion can reduce the demagnetizing field at the outermost diameter side corner portion of the permanent magnet. The performance degradation can be effectively suppressed.

It is sectional drawing of the axial direction of the rotary electric machine which has a rotor which concerns on Embodiment 1 of this invention. It is a fragmentary top view which shows 1 magnetic pole part of the rotor which concerns on Embodiment 1 of this invention. FIG. 3 is an enlarged view showing a part of a right half of the rotor shown in FIG. 2 in an enlarged manner. It is explanatory drawing which shows the relationship between the magnet position and demagnetizing field strength in the rotor which concerns on Embodiment 1 of this invention. It is explanatory drawing which shows the magnetic flux vector in the rotor which concerns on Embodiment 1 of this invention. It is explanatory drawing which shows the relationship between the magnet position in the rotor which concerns on the comparative example 1, and a demagnetizing field intensity. 6 is an explanatory diagram showing magnetic flux vectors in a rotor according to Comparative Example 1. FIG. It is an enlarged view which expands and shows the principal part of the rotor which concerns on Embodiment 2 of this invention. It is an enlarged view which expands and shows the principal part of the rotor which concerns on Embodiment 3 of this invention. It is an enlarged view which expands and shows the principal part of the rotor which concerns on Embodiment 4 of this invention. It is an enlarged view which expands and shows the principal part of the rotor which concerns on Embodiment 5 of this invention.

  Embodiments of the present invention will be described below with reference to the drawings.

Embodiment 1
A rotor of a rotating electrical machine according to the present embodiment will be described with reference to FIGS. The rotor 30 according to the present embodiment is mounted on the rotating electrical machine 10 shown in FIG. 1 used as a vehicle motor, for example. The rotating electrical machine 10 includes a stator 20 that serves as an armature, a rotor 30 that serves as a field, a stator 20 and the rotor 30, and is connected and fixed by fastening bolts (not shown) and a rear housing 11a and a rear housing. 11b and the like.

  The stator 20 is formed in an annular shape and has a plurality of slots (not shown) arranged in the circumferential direction, and is connected to an inverter (not shown) for power conversion wound around the slots of the stator core 21. Three-phase stator coil 25. The stator 20 is fixed by being sandwiched between the front housing 11a and the rear housing 11b, and is arranged coaxially on the outer diameter side of the rotor 30 with a predetermined gap.

  The rotor 30 rotates integrally with the rotary shaft 13 rotatably supported by the front housing 11a and the rear housing 11b via the bearing 12, and is formed by laminating a plurality of annular steel plates in the axial direction. The rotor core 31 is provided. A plurality of magnet holding holes 32 penetrating in the axial direction are provided at a predetermined distance in the circumferential direction on the outer diameter side of the rotor core 31 facing the inner diameter side of the stator 20. In each magnet holding hole 32, a permanent magnet 33 having a rectangular cross-sectional shape in a direction perpendicular to the rotation shaft 13 is embedded. In the case of the present embodiment, one magnetic pole is formed by a pair of permanent magnets 33 arranged in a V shape, and a plurality of magnetic poles whose polarities are alternately different in the circumferential direction by the plurality of pairs of permanent magnets 33 (the present embodiment). Then, 8 poles (N pole: 4, S pole: 4)) are formed.

  As shown in FIG. 2, the pair of permanent magnets 33 forming one magnetic pole is symmetrical with respect to the magnetic pole center line L1 passing through the magnetic pole center and the rotor rotation center O and extending in the radial direction by a predetermined angle. It arrange | positions in V shape so that it may become. In the present embodiment, a diffusion magnet having a coercive force distributed in the radial direction from the center of the magnet (the coercive force is higher toward the surface) is employed as the permanent magnet 33, thereby ensuring a high coercive force. Cost reduction is achieved. In addition, although the chamfering process is not given to the corner | angular part of the permanent magnet 33, a fine circular arc surface is inevitably formed.

  As shown in FIGS. 2 and 3, the magnet holding hole 32 has nonmagnetic material portions 34 a and 34 b on both sides in the circumferential direction of the permanent magnet 33 embedded in the magnet holding hole 32. The nonmagnetic material portions 34 a and 34 b are formed of a resin 38 filled in the space portion of the magnet holding hole 32. The nonmagnetic material portion 34a provided on the side opposite to the magnetic pole center line L1 of the permanent magnet 33 (on the right side in FIGS. 2 and 3) includes a nonmagnetic material portion 34a from the outer diameter side wall surface 32a of the magnet holding hole 32. A projecting portion 35 is provided so as to project. The protrusion 35 is defined by a triangle formed by a straight line connecting the first bending point P1, the second bending point P2, and the third bending point P3 in a cross section in a direction perpendicular to the rotation shaft 13.

  Here, the first bending point P1 includes the outer-diameter side wall surface 32a of the magnetite holding hole 32 that extends toward the outer diameter side as it goes away from the magnetic pole center line L1 and the outermost-diameter side corner portion 33a of the permanent magnet 33. It is a point located on the intersection where the straight line L2 which passes through and extends in the radial direction intersects. The second bending point P2 is a point located on the inner diameter side of the concentric circle S1 of the rotor rotation center O passing through the outermost diameter side corner portion 33a of the permanent magnet 33. The second bending point P2 is set in a range not exceeding the central axis L3 of the permanent magnet 33, that is, a position on the outer diameter side of the central axis L3. The position of the second bending point P2 is set so that the straight line connecting the first bending point P1 and the second bending point P2 is parallel to the side of the permanent magnet 33 on the nonmagnetic material portion 34a side. . The third bending point P3 is a point located on the outer diameter side of the concentric circle S2 of the rotor rotation center O that passes through the second bending point P2.

  A bridge portion 36 that connects the rotor core 31 in the circumferential direction is formed on the outer diameter side of the nonmagnetic material portion 34a. The bridge portion 36 extending in the circumferential direction has a substantially constant radial width except for both ends in the circumferential direction. That is, the inner diameter side wall surface 36a of the bridge portion 36 that defines the outer diameter side of the nonmagnetic material portion 34a is located on the concentric circle S3 of the rotor rotation center O, and the outer peripheral surface 36b of the bridge portion 36 is the rotor rotation center. It coincides with the outer peripheral surface of the rotor core 31 located on a concentric circle of O. In the present embodiment, the third bending point P3 that defines the protruding portion 35 is located on the inner diameter side wall surface 36 a of the bridge portion 36. The inner diameter side wall surface 36a of the bridge portion 36 is formed as a circular arc surface, but when the radius of curvature forming the circular arc surface is somewhat large, it is formed as a plane including a straight line connecting two points on the circular arc. It may be.

  The magnet holding hole 32 of the rotor core 31 is provided with a support portion 37 that protrudes from the inner diameter side wall surface 32 b to the nonmagnetic material portion 34 a and supports the circumferential outermost corner portion 33 b of the permanent magnet 33. The support portion 37 supports the outermost corner portion 33b in the circumferential direction of the permanent magnet 33 together with the projection portion 35 that supports the outermost diameter side corner portion 33a with respect to the permanent magnet 33 on which centrifugal force acts when the rotor 30 rotates. Have been to. Thereby, the centrifugal force acting on the permanent magnet 33 is distributed to the protrusion 35 and the support portion 37, so that the permanent magnet 33 is prevented from being chipped. In addition, after the permanent magnet 33 is inserted into each magnet holding hole 32, the resin 38 is filled between the wall surface of the magnet holding hole 32 and the permanent magnet 33 and the nonmagnetic material portions 34 a and 34 b. Thereby, the permanent magnet 33 embedded in each magnet holding hole 32 is firmly fixed to the rotor core 30.

  According to the rotor 30 of the present embodiment configured as described above, the rotor core 31 is defined by a straight line passing through the first bending point P1, the second bending point P2, and the third bending point P3, From the outer diameter side wall surface 32a of the magnet holding hole 32, there is a protrusion 35 that protrudes from a magnetic pole center line L1 of the permanent magnet 32 to a nonmagnetic material portion 34a provided on the opposite side in the circumferential direction. Therefore, as shown in FIG. 5, the magnetic flux from the stator 20 side toward the outermost diameter side corner portion 33 a of the permanent magnet 33 can be released in the direction of the protruding portion 35. As a result, as shown in FIG. 4, the demagnetizing field can be reduced at the outermost diameter side corner portion 33 a of the permanent magnet 33, so that the decrease in the amount of magnetic flux at the outermost diameter side corner portion 33 a can be reduced. .

  In the case of Comparative Example 1 shown in FIGS. 6 and 7, there is nothing corresponding to the protrusion 35 according to the present invention, so that the magnetic flux is at the outermost diameter side angle of the permanent magnet 33 as shown in FIG. It will hit the part 33a. Therefore, as shown in FIG. 6, since the demagnetizing field cannot be reduced at the outermost diameter side corner portion 33a of the permanent magnet 33, the amount of magnetic flux at the outermost diameter side corner portion 33a is greatly reduced.

  In the present embodiment, the third bending point P3 is located on the inner diameter side wall surface 36a of the bridge portion 36 that defines the outer diameter side of the nonmagnetic material portion 34a. The shape can be set, and the demagnetizing field can be advantageously reduced.

  Further, in the present embodiment, since a diffusion magnet is employed as the permanent magnet 33, the provision of the projection 35 reduces the demagnetizing field of the outermost diameter side corner 33a of the permanent magnet 33. Therefore, when the permanent magnet 33 is inserted into the magnet holding hole 32, the magnet core hits the rotor core 31, and the outermost diameter side corner 33 a is lost, or when the rotor 30 rotates, the outermost diameter side is affected by the centrifugal force. Even when the corner 33a is missing, it is possible to avoid a decrease in magnetic flux density of the permanent magnet 33 and to effectively suppress a decrease in performance. This diffusion magnet is less expensive than a general permanent magnet whose coercive force is substantially uniform throughout the magnet, but the coercive force inside the magnet is weak, so the tolerance for magnet defects is reduced. However, according to the present invention, it is possible to design with improved robustness.

  In the present embodiment, since the resin 38 is filled between the permanent magnet 33 embedded in the magnet holding hole 32 and the wall surface of the magnet holding hole 32 and the non-magnetic material portions 34a and 34b, the permanent magnet 33 is The resin 38 can be firmly fixed to the rotor core 30.

  In this embodiment, the magnet holding hole 32 of the rotor core 31 is provided with a support portion 37 that protrudes from the inner diameter side wall surface 32 b to the nonmagnetic material portion 34 a and supports the outermost circumferential corner portion 33 b of the permanent magnet 33. ing. As a result, the centrifugal force acting on the permanent magnet 33 when the rotor 30 rotates is applied to the protrusion 35 that supports the outermost diameter side corner 33a of the permanent magnet 33 and the support 37 that supports the outermost corner 33b in the circumferential direction. Since they can be dispersed, the occurrence of chipping of the permanent magnet 33 can be prevented.

[Embodiment 2]
The rotor 30A according to the second embodiment is different from the first embodiment only in the configuration of the protrusion 35A provided on the rotor core 31. Therefore, detailed description of members and configurations common to the first embodiment will be omitted, and different points will be described. In addition, about the member which is common in Embodiment 1, the same code | symbol is used.

  As shown in FIG. 8, the protrusion 35A of the second embodiment is defined by a trapezoid formed by passing through a fourth bending point P4 between the second bending point P2 and the third bending point P3. The first to third bending points P1 to P3 are set at the same positions as in the first embodiment.

  The rotor 30A according to the second embodiment has the same operations and effects as the first embodiment. Further, the protrusion 35A defined by the trapezoid of the second embodiment can increase the cross-sectional area in the direction perpendicular to the axis as compared with the protrusion 35 defined by the triangle as in the first embodiment. Can be suppressed.

[Embodiment 3]
The rotor 30B according to the third embodiment is different from the first embodiment only in the configuration of the protrusion 35B provided on the rotor core 31. Therefore, detailed description of members and configurations common to the first embodiment will be omitted, and different points will be described. In addition, about the member which is common in Embodiment 1, the same code | symbol is used.

  As shown in FIG. 9, the protrusion 35B of the third embodiment is defined by a triangle in which the corner of the second bending point P2 is formed by an arcuate curve. In this case, the first and third bending points P1 and P3 are set at the same positions as in the first embodiment.

  The rotor 30B according to the third embodiment has the same operations and effects as the first embodiment. Furthermore, the protrusion 35B of the third embodiment can suppress stress concentration at the corner of the second bending point P2 as compared to the protrusion 35 defined by the triangle as in the first embodiment.

[Embodiment 4]
A rotor 30C according to the fourth embodiment will be described with reference to FIG. The rotor 30C according to the fourth embodiment is different from that of the first embodiment only in that the permanent magnet 33A embedded in the magnet holding hole 32 is chamfered. Therefore, detailed description of members and configurations common to the first embodiment will be omitted, and different points will be described. In addition, about the member which is common in Embodiment 1, the same code | symbol is used.

  In the permanent magnet 33A of the fourth embodiment, an arcuate chamfer with a radius of curvature R is applied to the outermost diameter side corner portion 33a. In this case, the distance D between the first bending point P1 and the second bending point P2 that defines the shape of the protrusion 35 is set to be longer than the curvature radius R of the arc-shaped chamfered surface. The other three corners of the permanent magnet 33A are also arc-shaped chamfered with a radius of curvature R in the same manner as the outermost diameter corner 33a.

  The rotor 30C according to the fourth embodiment has the same operations and effects as those of the first embodiment. Furthermore, according to the fourth embodiment, the distance D between the first bending point P1 and the second bending point P2 is set to be longer than the radius of curvature R, and the outermost diameter side corner portion 33a of the permanent magnet 33A is the rotor. Since it is made so that it may not approach the 30C outer periphery, it can suppress that magnetic flux density reduces and output falls by the increased demagnetizing field.

[Embodiment 5]
A rotor 30D according to the fifth embodiment will be described with reference to FIG. The rotor 30D according to the fifth embodiment is different from the first embodiment only in that the permanent magnet 33B embedded in the magnet holding hole 32 is chamfered. Therefore, detailed description of members and configurations common to the first embodiment will be omitted, and different points will be described. In addition, about the member which is common in Embodiment 1, the same code | symbol is used.

  In the permanent magnet 33B according to the fifth embodiment, a planar chamfer having a height distance C is applied to the outermost diameter side corner portion 33a. In this case, the distance D between the first bending point P1 and the second bending point P2 that defines the shape of the protrusion 35 is set to be longer than the height distance C of the planar chamfered surface. Here, the height distance C of the planar chamfered surface is a length (height) from a right angle portion of a right-angled isosceles triangle including the planar chamfered surface to one side. The other three corners of the permanent magnet 33B are also chamfered at a height distance C in the same manner as the outermost diameter corner 33a.

  The rotor 30D according to the fifth embodiment has the same operations and effects as those of the first embodiment. Further, according to the fifth embodiment, the distance D between the first bending point P1 and the second bending point P2 is set to be longer than the height distance C, and the outermost diameter side corner portion 33a of the permanent magnet 33B is set. Since the rotor 30D is kept away from the outer periphery, it is possible to prevent the magnetic flux density from being reduced and the output from being lowered due to the increased demagnetizing field.

[Other Embodiments]
The present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the spirit of the present invention.

  For example, in the above embodiment, a pair of permanent magnets 33 is disposed per pole on the rotor core 31, but one permanent magnet 33 may be disposed per pole.

  Further, in the above-described embodiment, the example in which the rotor of the rotating electrical machine according to the present invention is applied to the rotor of the vehicle motor has been described, but the present invention can be used as a rotating electrical machine mounted on the vehicle as a generator, an electric motor, Furthermore, it can also be used for a rotor of a rotating electrical machine that can selectively use both.

  DESCRIPTION OF SYMBOLS 10 ... Rotating electrical machine 30, 30A, 30B, 30C, 30D ... Rotor, 31 ... Rotor core, 32 ... Magnet holding hole, 32a ... Outer diameter side wall surface, 32b ... Inner diameter side wall surface, 33, 33A, 33B ... Permanent magnet, 33a ... outermost diameter side corner part, 33b ... circumferential outermost side corner part, 34a, 34b ... nonmagnetic material part, 35, 35A, 35B ... projection part, 36 ... bridge part, 36a ... inner diameter side wall surface, 37 ... support part 38: resin, L1: magnetic pole center line, L2: straight line passing through the outermost diameter corner of the permanent magnet and the rotor rotation center, L3: center axis of the permanent magnet, O: rotor rotation center, P1: first bending Point, P2: Second bending point, P3: Third bending point, P4: Fourth bending point, S1, S2: Concentric circles, D: Distance between first bending point and second bending point, R: Arc-shaped chamfer Radius of curvature, C ... plane The height distance of the chamfered surface.

Claims (7)

An annular rotor core (31) having a plurality of magnet holding holes (32) arranged at a predetermined distance in the circumferential direction, and embedded in the magnet holding holes (32) so that the polarities are alternately different in the circumferential direction. In the rotor (30, 30A-30D) of the rotating electrical machine (10) provided with a plurality of permanent magnets (33) that form a plurality of magnetic poles
The magnet holding hole (32) has a nonmagnetic material portion (34a) on the opposite side in the circumferential direction from the magnetic pole center line (L1) of the permanent magnet (33) embedded in the magnet holding hole (32).
The rotor core (31) includes an outer-diameter side wall surface (32a) of the magnet holding hole (32) that extends toward the outer-diameter side as it moves away from the magnetic pole center line (L1) in the circumferential direction and the outermost side of the permanent magnet (33). The first bending point (P1) located on the intersection where the radial corner (33a) and the straight line (L2) passing through the rotor rotation center (O) intersect, and the outermost radial angle of the permanent magnet (33) A second bending point (P2) located on the inner diameter side of the concentric circle (S1) of the rotor rotation center (O) passing through the portion (33a) and the rotor rotation center passing through the second bending point (P2) (O) is defined by a line passing through at least three points including the third bending point (P3) located on the outer diameter side from the concentric circle (S2), and the outer diameter side wall surface of the magnet holding hole (32) ( 32a) projecting part (3) projecting from the non-magnetic material part (34a) The rotor of the rotating electric machine (10) characterized by having 35A, the 35B) (30,30A~30D).   The rotor (30, 30A to 30D) of the rotating electrical machine (10) according to claim 1, wherein a diffusion magnet is adopted as the permanent magnet (33).   The rotor core (31) has a bridge portion (36) for connecting the rotor core (31) in the circumferential direction on the outer diameter side of the nonmagnetic material portion (34a), and the third bending point (P3) is 3. The rotating electrical machine according to claim 1, wherein the rotating electrical machine is located on an inner diameter side wall surface (36 a) of the bridge portion (36) that defines an outer diameter side of the non-magnetic material portion (34 a). 10) Rotor (30, 30A-30D).   The protrusions (35A, 35B) are trapezoids formed by passing through a fourth bending point (P4) between the second bending point (P2) and the third bending point (P3), or the second 4. The rotor (30 </ b> A, 30 </ b> A) of the rotating electrical machine (10) according to claim 1, wherein a corner of the bending point (P <b> 2) is defined by a triangle formed by an arcuate curve. 30B).   The resin (38) is filled between the wall surface of the magnet holding hole (32) and the permanent magnet (33) embedded in the magnet holding hole (32). The rotor (30, 30A to 30D) of the rotating electrical machine (10) according to any one of the above.   The distance (D) between the first bending point (P1) and the second bending point (P2) is an arc-shaped chamfered surface applied to the outermost-diameter side corner (33a) of the permanent magnet (33). The rotor of the rotating electrical machine (10) according to any one of claims 1 to 5, wherein the rotor (10) is longer than a radius of curvature (R) or a height distance (C) of the planar chamfered surface. 30C, 30D).   The rotor core (31) protrudes from the inner diameter side wall surface (32b) of the magnet holding hole (32) to the nonmagnetic material portion (34a), and the circumferential outermost corner portion (33b) of the permanent magnet (33). The rotor (30, 30A to 30D) of the rotating electrical machine (10) according to any one of claims 1 to 6, further comprising a support portion (37) for supporting.

Images