Rotor for rotary electric machine

Abstract

A rotor for a rotary electric machine includes a rotor core, a first permanent magnet in a first magnet hole, a second permanent magnet in a second magnet hole, a first hole portion in which the first magnet hole is close to a d-axis side and a second hole portion in which the first magnet hole is far away from the d-axis side on one side in a circumferential direction with respect to the d-axis, the first hole portions on both sides in the circumferential direction with respect to the d-axis have a convex shape that protrudes inward in the radial direction of the iron core when viewed in the axial direction, and the first hole portions on both sides in the circumferential direction with respect to the d-axis have a convex shape that protrudes outward in the radial direction of the iron core with the d-axis as the center when viewed in the axial direction. The first permanent magnet extends in at least a portion of each of a first hole portion and a second hole portion in the first magnet hole.

Description

Technical Field

[0001] The present disclosure relates to a rotor for a rotating electric machine. Background Art

[0002] A two-layer configuration structure is known in which a plurality of permanent magnets are arranged in two layers in a rotor core.

[0003] Prior Art Documents

[0004] Patent Documents

[0005] Patent Document 1: Japanese Unexamined Patent Application Publication No. 2022-107370. Summary of the Invention

[0006] Problems to be Solved by the Invention

[0007] However, in the case of this two-layer configuration structure (similarly for a multi-layer configuration structure of three or more layers), in order to cope with an increase in centrifugal force accompanying high-speed rotation of the rotating electric machine, the magnet holes related to the radially outer layer are sometimes formed in a convex shape that bulges radially outward with the d-axis as the center when viewed axially. However, in this structure, due to such a convex shape toward the radially outer side, the distance (width of the bridge) between the magnet hole and the outer peripheral surface of the rotor core becomes large on the side far from the d-axis (outer peripheral side of the rotor core), and leakage flux tends to be a problem. In response to this, in order to narrow the width of the related bridge, a countermeasure of extending the magnet hole toward the outer peripheral surface (a countermeasure of expanding the part of the magnetic flux barrier) can be adopted, but in this countermeasure, the volume of the void part other than the permanent magnet tends to become relatively large.

[0008] Therefore, in one aspect, an object of the present disclosure is to enable high-speed rotation of a rotating electric machine, and to reduce leakage flux and increase the occupancy rate of the permanent magnet in the magnet hole.

[0009] Means for Solving the Problems

[0010] In one aspect, there is provided a rotor for a rotating electric machine, including: a rotor core, in which a first magnet hole is formed symmetrically about the d-axis when viewed axially, and a second magnet hole is formed symmetrically about the d-axis when viewed axially, the second magnet hole including two or more hole portions in a circumferentially continuous state;

[0011] a first permanent magnet disposed in the first magnet hole; and

[0012] a second permanent magnet disposed in the second magnet hole,

[0013] The rotor core includes: a first part located at a position radially outside the first magnet hole and forming the outer peripheral surface of the rotor core; a second part passing through between the first magnet hole and the second magnet hole and extending to the outer peripheral surface of the rotor core on both circumferential sides; and a third part passing through a position radially inside the second magnet hole and extending to the outer peripheral surface of the rotor core on both circumferential sides.

[0014] On one side in the circumferential direction with respect to the d-axis, a first hole part of the first magnet hole closer to the d-axis side and a second hole part farther from the d-axis side are convex-shaped and bulge toward the second part side when viewed axially, and the first hole parts on both sides in the circumferential direction with respect to the d-axis are convex-shaped and bulge toward the first part side with the d-axis as the center when viewed axially.

[0015] The first permanent magnet extends in at least a part of each of the first hole part and the second hole part in the first magnet hole.

[0016] Advantages of the Invention

[0017] In one aspect, according to the present disclosure, high rotation conversion of the rotating electric machine can be achieved, and leakage flux can be reduced and the occupancy rate of the permanent magnet in the magnet hole can be increased. Description of the Drawings

[0018] Figure 1 is a cross-sectional view schematically showing a cross-sectional structure of a motor according to an embodiment.

[0019] Figure 2 is a cross-sectional view of the rotor.

[0020] Figure 3 is Figure 2 an enlarged view of a part related to one magnetic pole shown.

[0021] Figure 3A is for Figure 3 an explanatory view of a modification example (No. 1) of the structure shown.

[0022] Figure 3B is for Figure 3 an explanatory view of a modification example (No. 2) of the structure shown.

[0023] Figure 4 is in Figure 3 a diagram showing lines for explaining shape features.

[0024] Figure 5 is a diagram showing the structure of the first comparative example.

[0025] Figure 6 is a diagram showing the structure of the second comparative example.

[0026] Figure 7 This is an explanatory diagram of the effects of this embodiment. Detailed implementation manners

[0027] Hereinafter, each embodiment will be described in detail with reference to the drawings. It should be noted that the dimensional ratios of the drawings are only examples and are not limited thereto. In addition, for the sake of convenience of explanation, the shapes in the drawings may sometimes be exaggerated locally.

[0028] Figure 1 This is a cross-sectional view schematically showing the cross-sectional structure of the motor 1 according to an embodiment. Figure 2 This is a cross-sectional view of the rotor 30 (a cross-sectional view based on a plane perpendicular to the axial direction). In addition, in Figure 2 etc., for the sake of easy observation, sometimes only a part of the parts having the same attribute existing in plural numbers are labeled with reference numerals.

[0029] In Figure 1 the rotation shaft 12 of the motor 1 is illustrated. In the following description, the axial direction refers to the direction in which the rotation shaft (rotation center) 12 of the motor 1 extends, and the radial direction refers to the radial direction centered on the rotation shaft 12. Therefore, the radially outer side refers to the side away from the rotation shaft 12, and the radially inner side refers to the side toward the rotation shaft 12. In addition, the circumferential direction corresponds to the rotation direction around the rotation shaft 12.

[0030] The motor 1 can be, for example, a motor for vehicle drive used in a hybrid vehicle or an electric vehicle. However, the motor 1 can also be used for any other purpose.

[0031] The motor 1 is an inner rotor type, and the stator 21 is provided around the radially outer side of the rotor 30. The radially outer side of the stator 21 is fixed to the motor housing 10. The stator 21 has, for example, a stator core 211 formed of a laminated steel sheet of a circular magnetic body, and a plurality of slots (not shown) for winding the coil 22 are formed on the radially inner side of the stator core 211.

[0032] The rotor 30 is disposed on the radially inner side of the stator 21.

[0033] The rotor 30 includes a rotor core 32, a rotor shaft 34, end plates 35A and 35B, and permanent magnets 61 and 62.

[0034] The rotor core 32 is fixed to the surface on the radially outer side of the rotor shaft 34 and rotates integrally with the rotor shaft 34. The rotor core 32 has a shaft hole 320 (refer to Figure 2) A rotor shaft 34 is fitted in the shaft hole 320. The rotor core 32 can be fixed to the rotor shaft 34 by shrink fitting, press fitting, or a similar method. For example, the rotor core 32 can also be coupled to the rotor shaft 34 by key coupling or spline coupling. The rotor shaft 34 is rotatably supported by bearings 14a and 14b in the motor housing 10. In addition, the rotor shaft 34 defines the rotation axis 12 of the motor 1.

[0035] The rotor core 32 is formed, for example, by stacking steel sheets of a circular ring-shaped magnetic material. Permanent magnets 61 and 62 are embedded inside the rotor core 32 (see Figure 2 ). That is, the rotor core 32 has magnet holes 321 and 322 that penetrate in the axial direction (see Figure 2 ), and the permanent magnets 61 and 62 are inserted and fixed in the magnet holes 321 and 322. In addition, in a modified example, the rotor core 32 can also be formed of a powder compact obtained by compressing and solidifying magnetic powder.

[0036] When viewed axially, the rotor core 32 has a circular ring shape, and the outer peripheral surface 328 of the rotor core 32 includes a portion having a fixed outer diameter. In addition, in a modified example, the circular shape of the rotor core 32 does not need to be a perfect circle, and for example, it can also be a circular shape with a notch (such as a welding groove, etc.) in a part.

[0037] As Figure 2 shown, when viewed axially, the rotor core 32 has a rotationally symmetric shape centered on the rotation axis 12. In the example shown in Figure 2 , the rotor core 32 is in a state where the permanent magnets 61 and 62 of each group overlap every time it rotates 45 degrees around the rotation axis 12.

[0038] The plurality of permanent magnets 61 and 62 can be formed of neodymium or the like. The plurality of permanent magnets 61 and 62 can be sintered magnets, or can also be formed of a material for bonded magnets (hereinafter, also simply referred to as "bonded magnet material") in which magnetic powder and a binder material are mixed. In the present embodiment, as an example, as Figure 2 shown, when viewed axially, the plurality of permanent magnets 61 and 62 are respectively arranged in pairs. In this case, a common magnetic pole is formed between the paired permanent magnets 61 and between the paired permanent magnets 62. In addition, the plurality of permanent magnets 61 and 62 are arranged such that the S pole and the N pole alternate in the circumferential direction. In addition, in the present embodiment, the number of magnetic poles is 8, but the number of magnetic poles is arbitrary.

[0039] In addition, in Figure 1 , a motor 1 having a specific structure is shown, but the structure of the motor 1 is not limited to this specific structure. For example, in Figure 1 , the rotor shaft 34 is hollow, but it can also be solid.

[0040] Next, with reference to Figure 3 the following figures, the rotor core 32 and the permanent magnets 61 and 62 will be described in more detail. Hereinafter, the structure related to one magnetic pole will be described, but the structures related to other magnetic poles may be the same.

[0041] Figure 3 is Figure 2 an enlarged view of a part related to one magnetic pole shown. The structure related to one magnetic pole is basically symmetric about the d-axis (expressed in English as "d-axis" in Figure 3 ) corresponding to the direction of the main magnetic flux (the direction of the field magnetic pole). Hereinafter, the side away from the d-axis means the side away from the d-axis, and the side close to the d-axis means the side close to the d-axis. In addition, the two circumferential sides of the d-axis are the two circumferential sides sandwiching the d-axis, and mean the two circumferential sides with the d-axis as the center relative to the circumferential direction of the d-axis.

[0042] In the rotor core 32, a magnet hole 321 on the radially outer side (hereinafter referred to as "the first magnet hole 321") and a magnet hole 322 on the radially inner side (hereinafter referred to as "the second magnet hole 322") are formed.

[0043] Two hole portions of the first magnet hole 321 are formed in pairs on the two circumferential sides of the d-axis. However, in a modified example, the first magnet hole 321 may also separately have a hole portion on the d-axis and hole portions separated on the two circumferential sides of the d-axis. Or, the first magnet hole 321 may be formed by a collection of a plurality of small hole portions. In this case, the shape of the first magnet hole 321 corresponds to the shape or arrangement of the collection of a plurality of small hole portions as a whole. A permanent magnet 61 is provided in each hole portion of the first magnet hole 321. In addition, a plurality of permanent magnets 61 may be arranged in one hole portion of the first magnet hole 321. For example, as in the rotor 30A shown in Figure 3A , two permanent magnets 61A may be arranged in one hole portion of the first magnet hole 321, and as in the rotor 30B shown in Figure 3B , four permanent magnets 61B may be arranged in one hole portion of the first magnet hole 321. In any case, within one hole portion of the first magnet hole 321, a plurality of permanent magnets 61A or 61B may be arranged separately from each other as shown in the figure, or may be arranged in a contacting state different from that shown in the figure. In addition, as in the rotor 30A shown in Figure 3A , Figure 3BAs in the case of the rotor 30B shown, in one hole portion of the first magnet hole 321, a plurality of permanent magnets 61A or 61B may not extend to the circumferential ends of the one hole portion, but non-magnet portions (such as cavity portions) may be formed at the circumferential ends of the one hole portion. Alternatively, although not shown, in one hole portion of the first magnet hole 321, a plurality of permanent magnets 61A or 61B may also extend to the circumferential ends of the one hole portion.

[0044] The second magnet hole 322 is provided at a position more radially inward than the first magnet hole 321. Similar to the first magnet hole 321, the second magnet hole 322 is formed in a paired state symmetric about the d-axis. In addition, the circumferential extension range of the second magnet holes 322 on both sides of the d-axis in the circumferential direction is wider than the circumferential extension range of the first magnet holes 321 on both sides of the d-axis in the circumferential direction.

[0045] In the present embodiment, the second magnet hole 322 includes a total of four hole portions formed in pairs of two on both sides of the d-axis in the circumferential direction. That is, the second magnet hole 322 has two hole portions formed on one side of the d-axis in the circumferential direction and two hole portions formed on the other side of the d-axis in the circumferential direction. Thus, in the present embodiment, a total of four hole portions form the second magnet hole 322 for one magnetic pole. However, in a modified example, the second magnet hole 322 may also be composed of a hole portion on the d-axis and two hole portions located on both sides of the d-axis in the circumferential direction in pairs. Alternatively, the second magnet hole 322 may also be formed by a collection of more small hole portions. In any case, the shape of the second magnet hole 322 corresponds to the shape or arrangement of the whole as a collection of a plurality of hole portions. Permanent magnets 62 are provided in each hole portion of the second magnet hole 322. At this time, gaps may be provided at both ends in the long side direction of the permanent magnet 62 between the second magnet hole 322 and the permanent magnet 62. In addition, the gaps may be cavities or filled with resin or the like. Alternatively, a plurality of permanent magnets 62 may be arranged in one hole portion of the second magnet hole 322.

[0046] By having such a first magnet hole 321 and a second magnet hole 322, the rotor core 32 has three portions 3211, 3212, 3213 (hereinafter, also referred to as the first portion 3211, the second portion 3212, and the third portion 3213) connected only via bridges in the radial direction.

[0047] Specifically, the first portion 3211 extends more radially outward than the first magnet hole 321. The first portion 3211 forms a part of the outer peripheral surface 328 of the rotor core 32.

[0048] The second part 3212 passes through the space between the second magnet hole 322 and the first magnet hole 321 and extends to the outer peripheral surface 328 of the rotor core 32 on both circumferential sides. The second part 3212 forms a part of the outer peripheral surface 328 of the rotor core 32 on both circumferential sides of the first part 3211. The second part 3212 forms a magnetic path for the q-axis magnetic flux. Specifically, the q-axis magnetic flux flows from one end of the second part 3212 toward the other end through the space between the second magnet hole 322 and the first magnet hole 321 (refer to the arrow M5 schematically illustrated in Figure 4 ).

[0049] The third part 3213 passes through a position radially inward of the second magnet hole 322 and extends to the outer peripheral surface 328 of the rotor core 32 on both circumferential sides. The third part 3213 forms a part of the outer peripheral surface 328 of the rotor core 32 on both circumferential sides of the second part 3212.

[0050] In addition, in the present embodiment, the mass of the third part 3213 is significantly greater than the mass of the second part 3212, and the mass of the second part 3212 is significantly greater than the mass of the first part 3211.

[0051] Further, the rotor core 32 has a plurality of bridges 41, 42, 43, 44, 45 connecting the three parts 3211, 3212, 3213 by having such three parts 3211, 3212, 3213.

[0052] The bridge 41 (hereinafter referred to as "the first bridge 41") supports the first part 3211 on the second part 3212 on the radially outer side. That is, the first bridge 41 connects the second part 3212 and the first part 3211 and extends in the circumferential direction. The first bridge 41 is provided in pairs on both circumferential sides of the first part 3211.

[0053] The bridge 42 (hereinafter referred to as "the second bridge 42") supports the second part 3212 on the third part 3213 on the radially outer side. That is, the second bridge 42 connects the third part 3213 and the second part 3212 and extends in the circumferential direction. The second bridge 42 is provided in pairs on both circumferential sides of the second part 3212.

[0054] The bridge 43 supports the first part 3211 on the second part 3212 at a position radially inward of the first bridge 41.

[0055] The bridge 44 (hereinafter referred to as "the center bridge 44") supports the second part 3212 on the third part 3213 on the d-axis.

[0056] The bridge 45 (hereinafter referred to as the "intermediate bridge 45") supports the second part 3212 at a position radially outside (away from the d-axis side) the center bridge 44 and radially inside the second bridge 42 to the third part 3213.

[0057] Next, with reference to Figure 4 the following figures, further characteristic structures of this embodiment will be described. Figure 4 is a figure Figure 3 illustrating lines for explaining shape characteristics. Figure 5 is a figure showing the structure of the first comparative example, Figure 6 is a figure showing the structure of the second comparative example, Figure 7 is a part of a figure for explaining the effects of this embodiment by comparison with the first and second comparative examples. In Figures 5 to 7 flux (flux generated by magnetic poles) flows are schematically shown by R5 to R7, respectively.

[0058] In the following description, unless otherwise specified, various configurations and forms represent the configurations and forms when observed along the axial direction.

[0059] In this embodiment, the first magnet hole 321 has a W-shaped form centered on the d-axis. Specifically, the hole portion 321-1 on the d-axis side of the first magnet hole 321 (hereinafter also referred to as the "first hole portion 321-1") has a convex form protruding radially outward centered on the d-axis, and the hole portion 321-2 on the side away from the d-axis (hereinafter also referred to as the "second hole portion 321-2") has a convex form protruding radially inward by combining with the first hole portion 321-1 on one side of the d-axis.

[0060] According to this embodiment, since the first magnet hole 321 has a W-shaped form, the mass of the first part 3211 can be effectively reduced compared with the case where it is not so. As a result, the stress in each of the bridges 41 and 43 caused by centrifugal force can be effectively reduced.

[0061] In addition, when the first hole portion 321-1 in the first magnet hole 321 has a convex form protruding radially outward centered on the d-axis, as Figure 4 shown, the angle β formed by the shape center line L5 of the portion near the d-axis and the d-axis is an acute angle on the radially inner side.

[0062] In this embodiment, the permanent magnets 61 are respectively disposed in the first hole portion 321-1 and the second hole portion 321-2 of the first magnet hole 321. In this case, the permanent magnets 61 may be disposed in a part of each of the first hole portion 321-1 and the second hole portion 321-2, or may be disposed in the whole of one of the first hole portion 321-1 and the second hole portion 321-2 and in a part of the other. In this embodiment, as an example, as Figure 4 shown, the permanent magnets 61 are disposed in the whole of each of the first hole portion 321-1 and the second hole portion 321-2.

[0063] In this case, the permanent magnets 61 may also be formed of a bonded magnet material. When the permanent magnets 61 are formed of a bonded magnet material, the permanent magnets 61 can also be filled (disposed) in the first magnet hole 321 without a gap. Alternatively, the permanent magnets 61 may be formed by using a combination of a magnet portion made of a bonded magnet material and a sintered magnet. In this case, the sintered magnet is disposed in the first hole portion 321-1 having a shape closer to a rectangle, and the magnet portion related to the bonded magnet material may be disposed in the second hole portion 321-2 in a relatively complex shape. In other words, by using the bonded magnet material, the permanent magnets 61 can also be formed in a space used as a magnetic flux barrier (especially a space having a shape in which it is difficult to insert a sintered magnet when viewed axially).

[0064] According to such an arrangement of the permanent magnets 61, the distance (radial distance or shortest distance) of the portion of the permanent magnets 61 disposed in the second hole portion 321-2 from the outer peripheral surface 328 of the rotor core 32 becomes closer than the portion disposed in the first hole portion 321-1. Thus, as described later, it is possible to minimize the leakage magnetic flux via the first bridge 41 and to increase the occupancy rate of the permanent magnets 61 in the first magnet hole 321.

[0065] In addition, in this embodiment, the second magnet hole 322 has a W-shaped configuration centered on the d-axis. Specifically, the portion of the second magnet hole 322 closer to the d-axis side has a convex shape protruding radially outward centered on the d-axis, and the portion farther from the d-axis side has a convex shape protruding radially inward by combining with the portion closer to the d-axis side. In addition, in this embodiment, the portion closer to the d-axis side corresponds to the hole portions 322-1 on both circumferential sides provided with the center bridge 44 interposed therebetween, and the portion farther from the d-axis side corresponds to the hole portions 322-2 on both circumferential sides provided with the intermediate bridge 45 interposed therebetween.

[0066] In addition, when the portion of the second magnet hole 322 closer to the d-axis side has a convex shape protruding radially outward centered on the d-axis, as Figure 4As shown, the angle α formed by the shape center line L4 of the portion near the d-axis side and the d-axis is an acute angle on the radially inner side. In addition, when the portion near the d-axis side in the second magnet hole 322 has a circular arc shape as shown in Figure 4 , the shape center line L4 can be the tangential direction of the d-axis side end (the end near the d-axis side) of the circular arc.

[0067] In the present embodiment, the permanent magnet 62 can be disposed in the entirety of the second magnet hole 322, or can be disposed in a part of the second magnet hole 322.

[0068] In addition, in the present embodiment, as shown in Figure 4 , the convex shape that protrudes radially inward in the second magnet hole 322 has a bent portion (refer to R41, R42) having a center of curvature on the d-axis side (radially outer side). In addition, in the example shown in Figure 4 , the second magnet hole 322 has bent portions (refer to R41, R42) on both sides sandwiching the intermediate bridge 45, but only one side may have a bent portion (R41 or R42). In addition, the second magnet hole 322 does not need to be a bent portion as a whole. For example, only the portion near the intermediate bridge 45 may be a bent portion. In addition, the radius of curvature of the bent portion can be constant or can vary within one bent portion.

[0069] In addition, the convex shape that protrudes radially inward in the first magnet hole 321 may similarly have a bent portion having a center of curvature on the d-axis side (radially outer side).

[0070] According to the present embodiment, since the second magnet hole 322 and the first magnet hole 321 together have a W-shaped configuration, the masses of the first portion 3211 and the second portion 3212 can be effectively reduced. As a result, the stress in each bridge (bridges 41, 42, 43, 44, 45) caused by the centrifugal force can be effectively reduced.

[0071] Among them, in the rotor 32” of the first comparative example shown in Figure 5 , it is different from the present embodiment in that the first magnet hole 321 is replaced by the first magnet hole 321”. The first magnet hole 321” is different from the first magnet hole 321 of the present embodiment in that it does not have a portion corresponding to the second hole portion 321-2. In addition, the permanent magnet 61” has a configuration corresponding to the first magnet hole 321”. In this case, the first portion 3211” is supported by the relatively large bridge 41”. As schematically shown by the arrow R5 in Figure 5 , there is a problem that the leakage magnetic flux passing through the bridge 41” becomes significantly larger.

[0072] In Figure 6In the rotor 32' of the second comparative example shown, the permanent magnet 61 is replaced with a permanent magnet 61', which is different from this embodiment. The permanent magnet 61' is different from the permanent magnet 61 of this embodiment in that it is not disposed in the second hole portion 321-2. That is, in the second comparative example, the second hole portion 321-2 functions as a magnetic flux barrier. In this second comparative example, in the first magnet hole 321, the volume of the void portion other than the permanent magnet 61' tends to be relatively large.

[0073] In contrast, in this embodiment, as described above, since the permanent magnet 61 is provided over the entire W-shaped first magnet hole 321, it is possible to reduce the leakage magnetic flux and increase the occupancy rate of the permanent magnet 61 in the magnet hole 321. That is, in this embodiment, by extending the magnet hole 321 also to the portion where a relatively large leakage magnetic flux is generated in the first comparative example, the leakage magnetic flux can be reduced. Further, in this embodiment, by extending the permanent magnet 61 also to the void portion that is used as a magnetic flux barrier in the second comparative example, it is possible to increase the occupancy rate of the permanent magnet 61 in the magnet hole 321. As a result, in this embodiment, as Figure 7 schematically shown by the arrow R7 in Figure 6 , as compared with the case of the second comparative example schematically shown by the arrow R6 in

[0074] it is possible to increase the magnetic flux related to the permanent magnet 61 and improve the torque characteristics of the motor 1.

[0075] As described above, each embodiment has been described in detail, but it is not limited to a specific embodiment, and various changes and modifications can be made within the scope described in the claims. Further, all or a plurality of the constituent elements of the above-described embodiments can be combined.

[0076] For example, in the above-described embodiment 1 (the same applies to other embodiments), the first magnet hole 321 includes two or more hole portions in a circumferentially continuous state symmetrically about the d-axis when viewed axially, but the first magnet hole 321 may also be formed of a single hole portion.

[0077] Description of Reference Numerals

[0078] 30 Rotor (rotor for rotating electrical machine), 32 Rotor core, 3211 First part, 3212 Second part, 3213 Third part, 321 First magnet hole, 321-1 First hole portion, 321-2 Second hole portion, 322 Second magnet hole, 61 Permanent magnet (first permanent magnet), 62 Permanent magnet (second permanent magnet).

Claims

1. A rotor for a rotating electrical machine, in, include: A rotor core having a first magnet hole formed symmetrically about the d axis when viewed in the axial direction, and a second magnet hole formed symmetrically about the d axis when viewed in the axial direction, wherein the second magnet hole includes two or more hole portions in a state of being continuous in the circumferential direction; A first permanent magnet is disposed in the first magnet hole; as well as A second permanent magnet is disposed in the second magnet hole. The rotor core includes: a first portion located radially outward of the first magnet hole and forming an outer peripheral surface of the rotor core; a second portion passing between the first magnet hole and the second magnet hole and extending to the outer peripheral surface of the rotor core on both sides in the circumferential direction; and a third portion passing radially inward of the second magnet hole and extending to the outer peripheral surface of the rotor core on both sides in the circumferential direction. On one side in the circumferential direction relative to the d-axis, the first hole portion of the first magnet hole close to the d-axis side and the second hole portion far from the d-axis side are convexly convexed toward the second portion side when viewed in the axial direction, and the first hole portions on both sides in the circumferential direction relative to the d-axis are convexly convexly convexly convexed toward the first portion side with the d-axis as the center when viewed in the axial direction, The first permanent magnet extends in at least a portion of each of the first hole portion and the second hole portion in the first magnet hole.

2. The rotor for a rotating electrical machine according to claim 1, in, The first hole portion is connected to the second hole portion, The first permanent magnet extends throughout the entirety of the second hole portion.

3. The rotor for a rotating electrical machine according to claim 1, in, When viewed in the axial direction, the magnet portion of the first permanent magnet in the second hole portion is closer to the outer peripheral surface of the rotor core than the magnet portion of the first permanent magnet in the first hole portion.

4. The rotor for a rotating electrical machine according to any one of claims 1 to 3, in, When viewed in the axial direction, the portion of the second magnet hole extending on both sides of the d-axis in the circumferential direction across or passing through the d-axis has a convex shape convex toward the second portion with the d-axis as the center.

5. The rotor for a rotating electrical machine according to claim 4, in, At least a magnet portion of the first permanent magnet extending into the second hole portion is formed of a bonded magnet material.

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