Rotor and rotary electric machine

Abstract

To provide a rotor and a rotary electric machine which can be easily manufactured.SOLUTION: A rotor 20 is disposed in a rotary electric machine, faces a stator, and rotates about a center axis. The rotor includes a plurality of magnetic pole parts arranged in a circumferential direction about the center axis, and a rotor core 22 supporting the magnetic pole parts from one side in a radial direction. The magnetic pole parts have first magnets 40 each having a magnetization direction in the radial direction, and second magnets 50 that are symmetrically arranged circumferentially outside the first magnets and each have a magnetization direction circumferentially oblique to the radial direction. A first gap G1 is disposed between the first magnet and the second magnet in the circumferential direction. A second gap 2 is disposed between the second magnets of the adjacent magnetic pole parts in the circumferential direction. The maximum width of the second gap in the circumferential direction is larger than the maximum width of the first gap in the circumferential direction.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present invention relates to a rotor and a rotating electric machine. [Background technology]

[0002] A motor is known in which the magnets of the rotor are arranged in a Halbach array to increase the driving torque (for example, Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2005-45984 Summary of the Invention [Problem to be solved by the invention]

[0004] Since magnets with different magnetization directions are arranged with no gaps in the circumferential direction, the problem arises that the circumferential dimensions of the magnets must be manufactured with high precision.

[0005] The present invention has been made in consideration of the above points, and an object of the present invention is to provide a rotor and a rotating electric machine that are easy to manufacture. [Means for solving the problem]

[0006] One aspect of the rotor of the present invention is a rotor that is provided in a rotating electric machine, faces a stator, and rotates around a central axis, and includes a plurality of magnetic pole portions arranged circumferentially around the central axis, and a rotor core that supports the magnetic pole portions from one radial side, wherein the magnetic pole portions have first magnets whose magnetization direction is the radial direction, and second magnets that are arranged symmetrically circumferentially outside the first magnets and whose magnetization direction is inclined circumferentially with respect to the radial direction, a first gap is provided between the first magnets and the second magnets in the circumferential direction, and a second gap is provided between the second magnets in the circumferential direction between adjacent magnetic pole portions, and the maximum circumferential width of the second gap is greater than the maximum circumferential width of the first gap.

[0007] One aspect of a rotating electric machine of the present invention includes the rotor described above and a stator positioned radially outward of the rotor. [Effects of the Invention]

[0008] According to one aspect of the present invention, it is possible to facilitate the manufacture of a rotor and a rotating electric machine. [Brief explanation of the drawings]

[0009] [Figure 1] FIG. 1 is a cross-sectional view showing a rotating electric machine according to this embodiment. [Figure 2] FIG. 2 is a plan view showing a part of the rotor of this embodiment. [Figure 3] FIG. 3 is an enlarged plan view of a part of the rotor of this embodiment. [Figure 4] FIG. 4 is a schematic diagram showing the flow of magnetic flux. [Figure 5] FIG. 5 is a diagram showing the relationship between the distance between the second magnets and the back electromotive force constant. DETAILED DESCRIPTION OF THE INVENTION

[0010] Hereinafter, a rotor and a rotating electric machine according to an embodiment of the present invention will be described with reference to the drawings. Note that the scope of the present invention is not limited to the following embodiments and can be modified as desired within the scope of the technical concept of the present invention. In addition, in the following drawings, the scale and number of components may differ from the actual structure in order to make each component easier to understand.

[0011] In the following description, the axial direction of the central axis J, i.e., the direction parallel to the up-down direction, will be simply referred to as the "axial direction," the radial direction centered on the central axis J will be simply referred to as the "radial direction," and the circumferential direction centered on the central axis J will be simply referred to as the "circumferential direction." In this embodiment, the lower side (-Z) corresponds to the other axial side, and the upper side (+Z) corresponds to one axial side. Note that the up-down direction, upper side, and lower side are simply names used to describe the relative positional relationships of the various parts, and the actual positional relationships may be other than those indicated by these names.

[0012] Note that the terms "upper direction," "upper side," and "lower side" are simply names used to explain the relative positions of the various parts, and the actual relative positions may be other than those indicated by these names.

[0013] FIG. 1 is a schematic cross-sectional view of a rotary electric machine 1 taken along a central axis J. As shown in FIG. The rotating electric machine 1 of this embodiment includes a rotor 20, a stator 30, a plurality of bearings 15, and a housing 11 that accommodates these. The bearings 15 rotatably support a shaft 21 of the rotor 20. The bearings 15 are held in the housing 11.

[0014] The rotating electric machine 1 of this embodiment is an inner rotor type rotating electric machine in which the rotor 20 is disposed radially inside the stator 30. In the embodiment described below, the radially inside is defined as one radial side, and the radially outside is defined as the other radial side. However, the rotating electric machine may also be an outer rotor type in which the rotor is disposed radially outside the stator. In this case, the one radial side and the other radial side are reversed in each part of the rotor.

[0015] The stator 30 has an annular shape centered on a central axis J. The rotor 20 is disposed radially inside the stator 30. The stator 30 faces the rotor 20 in the radial direction.

[0016] The stator 30 includes a stator core 31, an insulator 32, and a plurality of coils 33. The stator core 31 is made up of a plurality of magnetic members stacked along the axial direction.

[0017] The stator core 31 has a substantially annular core back 31c and a plurality of teeth 31b. In this embodiment, the core back 31c has an annular shape centered on the central axis J. The teeth 31b extend radially inward from the radially inner surface of the core back 31c. The outer peripheral surface of the core back 31c is fixed to the inner peripheral surface of the peripheral wall portion of the housing 11. The plurality of teeth 31b are arranged on the radially inner surface of the core back 31c at intervals from one another in the circumferential direction. In this embodiment, the plurality of teeth 31b are arranged at equal intervals in the circumferential direction.

[0018] The insulator 32 is attached to the stator core 31. The insulator 32 has a portion that covers the teeth 31b. The insulator 32 is made of an insulating material such as resin.

[0019] The coil 33 is attached to the stator core 31. The plurality of coils 33 are attached to the stator core 31 via insulators 32. The plurality of coils 33 are configured by winding a conducting wire around each of the teeth 31b with the insulators 32 interposed therebetween.

[0020] The rotor 20 is provided in the rotary electric machine 1 and faces the stator 30. The rotor 20 rotates about a central axis J. The rotor 20 has a shaft 21, a rotor core 22, and a plurality of (eight in this embodiment) magnetic pole portions 28 arranged along the circumferential direction on the outer circumferential surface of the rotor core 22. The rotor 20 may further have a cylindrical cover member that surrounds the entire rotor 20 from the radially outer side.

[0021] The shaft 21 has a cylindrical shape that extends in the axial direction about a central axis J. The shaft 21 is rotatably supported by a pair of bearings 15.

[0022] The rotor core 22 has a columnar shape extending in the axial direction along the central axis J. When viewed in the axial direction, the rotor core 22 has a generally polygonal shape. The rotor core 22 is made of a ferromagnetic material. The rotor core 22 of this embodiment is made of a plurality of magnetic members stacked along the axial direction. The rotor core 22 is not limited to a ferromagnetic material and may be made of a non-magnetic material.

[0023] The rotor core 22 is provided with a central hole 22h that penetrates in the axial direction and lightening holes 22d. The central hole 22h is located at the center of the rotor core 22 when viewed from the axial direction. The shaft 21 is inserted into and fixed in the central hole 22h. The lightening holes 22d are provided to lighten the rotor core 22 and reduce its weight.

[0024] FIG. 2 is a plan view showing a portion of the rotor 20. As shown in FIG. The rotor 20 of this embodiment is a surface permanent magnet (SPM) rotor. First magnets 40 and second magnets 50 that constitute magnetic pole portions 28 are adhesively fixed to the outer peripheral surface facing radially outward of the rotor core 22. As a result, the rotor core 22 supports the multiple magnetic pole portions 28 from the radially inner side.

[0025] The rotor 20 has a plurality of magnetic pole portions 28 (12 in this embodiment). The plurality of magnetic pole portions 28 are arranged in a circumferential direction centered on the central axis J. The plurality of magnetic pole portions 28 are arranged at equal intervals in the circumferential direction. The magnetic flux directions of the magnetic pole portions 28 adjacent to each other in the circumferential direction are reversed in the radial direction. In other words, the magnetic pole portions 28 arranged in the circumferential direction are arranged alternately with the north poles and south poles facing radially outward along the circumferential direction.

[0026] Each magnetic pole portion 28 has one first magnet 40 and two second magnets 50. The second magnets 50 are arranged symmetrically around the circumferential outside of the first magnet 40. Therefore, the second magnets 50 of different magnetic pole portions 28 are arranged adjacent to each other at the boundary between circumferentially adjacent magnetic pole portions 28. In the rotor 20, two second magnets 50 are arranged between a pair of first magnets 40.

[0027] The first magnet 40 and the second magnet 50 each have a uniform cross section and extend in a columnar shape along the axial direction of the central axis J. The top surfaces of the first magnet 40 and the second magnet 50 form approximately the same plane. Similarly, the bottom surfaces of the first magnet 40 and the second magnet 50 form approximately the same plane.

[0028] The magnetization direction of the first magnet 40 is the radial direction. On the other hand, the magnetization direction of the second magnet 50 is a direction that is inclined circumferentially relative to the radial direction. The magnetization direction of the second magnet 50 is a direction that intersects the radial direction. The magnetization direction of the second magnet 50 of this embodiment is a direction that intersects the radial and circumferential directions. As described above, in one magnetic pole portion 28, the pair of second magnets 50 are arranged symmetrically on the circumferential outside of the first magnet 40. Therefore, the magnetization directions of the pair of second magnets 50 are symmetrical to each other relative to the first magnet 40.

[0029] In FIG. 2, the arrows in the first magnets 40 and second magnets 50 indicate the magnetization direction of each magnet. As shown in FIG. 2, the magnetization directions of the first magnets 40 of circumferentially adjacent magnetic pole portions 28 differ from each other on the inside and outside of the radial direction. That is, the magnetization directions of the first magnets 40 of circumferentially adjacent magnetic pole portions 28 are opposite to each other. The second magnet 50 arranged circumferentially outside of the first magnet 40 whose magnetization direction is the radially outside has a magnetization direction that is closer to the first magnet 40 and points radially outward. The second magnet 50 arranged circumferentially outside of the first magnet 40 whose magnetization direction is the radially inside has a magnetization direction that is farther from the first magnet 40 and points radially inward. In this way, the first magnets 40 and second magnets 50 constituting each magnetic pole portion 28 are arranged in a Halbach array.

[0030] The first magnet 40 has a substantially rectangular shape when viewed in the axial direction. The first magnet 40 has four side surfaces 41, 41, 42, and 43 extending along the axial direction. The four corners of the first magnet 40 are each tapered or arc-shaped and do not have a vertex.

[0031] The first magnet 40 has a pair of first magnet side surfaces 41 facing circumferentially, a first supported surface 42 facing radially inward, and a first magnet opposing surface 43 facing radially outward. Of the four side surfaces 41, 41, 42, 43 of the first magnet 40, the pair of first magnet side surfaces 41 and the first supported surface 42 are flat surfaces. The first supported surface 42 intersects with the first magnet side surfaces 41 at a right angle. Because the first supported surface 42 intersects with the first magnet side surfaces 41 at a right angle, the first magnet 40 can be manufactured more easily than, for example, when the first magnet side surfaces 41 are not parallel and extend radially when viewed axially.

[0032] The first magnet 40 has a first magnet supported portion 44 having a first supported surface 42. The first magnet supported portion 44 is an area of ​​the first magnet 40 that has a predetermined thickness dimension extending radially outward from the first supported surface 42, and is the portion that is supported by the rotor core 22.

[0033] The pair of first magnet side surfaces 41 face opposite each other in the circumferential direction. That is, each first magnet side surface 41 faces outward in the circumferential direction of the first magnet 40. When viewed from the axial direction, the first magnet side surface 41 is a flat surface located in the circumferential center of the first magnet 40 and parallel to a line extending in the radial direction. In this embodiment, the pair of first magnet side surfaces 41 are parallel to each other. Therefore, the first magnet side surfaces 41 are slightly inclined with respect to the radial direction. Note that the first magnet side surfaces 41 may also be flat surfaces that are completely aligned with the radial direction.

[0034] The first supported surface 42 is a flat surface perpendicular to the radial direction. The first supported surface 42 faces the rotor core 22, comes into contact with it, and is supported by it. The rotor core 22 has a first supporting surface 23a. The circumferential length of the first supporting surface 23a is approximately the same as the circumferential length of the first supported surface 42. The first supporting surface 23a faces the first supported surface 42 and comes into contact with it.

[0035] The first support surface 23a is provided with a first groove 24 recessed radially inward. An adhesive is filled into the first groove 24. Therefore, the first supported surface 42 is fixed to the first support surface 23a via the adhesive filled into the first groove 24. As a result, the first magnet 40 is fixed to the rotor core 22 at the first magnet supported portion 44.

[0036] The first magnet facing surface 43 faces the stator 30. The first magnet facing surface 43 is a gently curved surface with a constant distance to the central axis J. Therefore, the thickness dimension along the radial direction of the first magnet 40 is greatest at the circumferential center and decreases toward both sides in the circumferential direction. In this embodiment, the first magnet facing surface 43 is an arcuate surface with a constant radius of curvature.

[0037] The second magnet 50 has a substantially rectangular shape when viewed in the axial direction. The second magnet 50 has four side surfaces 51, 51, 52, and 53 extending along the axial direction. That is, the second magnet 50 has a pair of second magnet side surfaces 51 facing the circumferential direction, a second supported surface 52 facing radially inward, and a second magnet opposing surface 53 facing radially outward. The four side surfaces 51, 51, 52, and 53 of the second magnet 50 are all flat surfaces. Furthermore, the four corners of the second magnet 50 are each tapered or arc-shaped and do not have a vertex. The four side surfaces 51, 51, 52, and 53 intersect at right angles when viewed in the axial direction. That is, the second magnet 50 has a substantially rectangular quadrangle when viewed in the axial direction.

[0038] Since the second magnet 50 has a substantially rectangular shape when viewed in the axial direction, the second magnet 50 can be manufactured more easily than, for example, when the second magnet 50 does not have a rectangular shape when viewed in the axial direction.

[0039] The second magnet 50 has a second magnet supported portion 54 having a second supported surface 52. The second magnet supported portion 54 is an area of ​​the second magnet 50 with a predetermined thickness dimension extending radially outward from the second supported surface 52, and is the portion supported by the rotor core 22.

[0040] The pair of second magnet side surfaces 51 face opposite each other in the circumferential direction. That is, each second magnet side surface 51 faces outward in the circumferential direction of the second magnet 50. When viewed from the axial direction, the second magnet side surface 51 is a flat surface located in the circumferential center of the second magnet 50 and parallel to a line extending in the radial direction. In this embodiment, the pair of second magnet side surfaces 51 are parallel to each other. Therefore, the second magnet side surfaces 51 are slightly inclined with respect to the radial direction. Note that the second magnet side surfaces 51 may also be flat surfaces that are completely aligned with the radial direction.

[0041] The second supported surface 52 is a flat surface perpendicular to the radial direction. The second supported surface 52 faces the rotor core 22 and is in contact with and supported by the rotor core 22. The rotor core 22 has a second support surface 23b. The circumferential length of the second support surface 23b is approximately the same as the circumferential length of the second supported surface 52. The second support surface 23b faces the second supported surface 52 and is in contact with it.

[0042] The second support surface 23b is provided with a second groove 25 recessed radially inward. The second groove 25 is filled with adhesive. Therefore, the second supported surface 52 is fixed to the second support surface 23b via the adhesive filled in the second groove 25. As a result, the second magnet 50 is fixed to the rotor core 22 at the second magnet supported portion 54.

[0043] The second magnet facing surface 53 faces the stator 30. The second magnet facing surface 53 is a flat surface that is perpendicular to the radial direction.

[0044] A first gap G1 is provided between the first magnet 40 and the second magnet 50 in the circumferential direction. A second gap G2 is provided between the second magnets 50 of adjacent magnetic pole portions 28 in the circumferential direction. By providing the second gap G2 between the second magnets 50 of adjacent magnetic pole portions 28, leakage magnetic flux from the second magnet 50 of one magnetic pole portion 28 to the second magnet 50 of another adjacent magnetic pole portion 28 can be reduced.

[0045] The maximum widths of the first gap G1 and the second gap G2 increase radially outward. As shown in Fig. 3, the second dimension H2, which indicates the maximum circumferential width of the second gap G2, is larger than the first dimension H1, which indicates the maximum circumferential width of the first gap G1. By making the second dimension H2 larger than the first dimension H1, it is possible to increase the magnetic flux flowing from the second magnet 50 to the first magnet 40 in the magnetic pole portion 28, and to suppress a decrease in motor efficiency.

[0046] The first magnet 40 and the second magnet 50 have portions that contact each other. The first magnet 40 and the second magnet 50 contact each other at the radially inner ends of the first magnet side surface 41 and the second magnet side surface 51 that face each other in the circumferential direction. By the first magnet 40 and the second magnet 50 having portions that contact each other, it is possible to increase the magnetic flux flowing through the first magnet 40 compared to when there are no portions that contact each other.

[0047] In the second gap G2, the second support surface 23b of the rotor core 22 is exposed. In the second gap G2, both the second support surface 23b that supports the second magnet 50 in one magnetic pole portion 28 and the second support surface 23b that supports the second magnet 50 in another magnetic pole portion 28 adjacent to the one magnetic pole portion 28 are exposed. A ridge line 23c is provided at the intersection of the second support surfaces 23b that support the second supported surfaces 52 of the opposing second magnets 50 between circumferentially adjacent magnetic pole portions 28. In the second gap G2, the ridge line 23c is exposed.

[0048] In the rotor 20 and rotating electric machine 1 configured as described above, by providing the second gap G2 between the second magnets 50 of adjacent magnetic pole portions 28, magnetic short circuits between the second magnets 50 are reduced and the effective magnetic flux flowing into the stator is increased, as shown in Fig. 4. As a result, as shown in Fig. 5, the greater the distance between the second magnets 50, the higher the back electromotive force constant [Ke], enabling higher output density.

[0049] As described above, in the rotor 20 and rotating electric machine 1 of this embodiment, a first gap G1 is provided between the first magnet 40 and the second magnet 50, and a second gap G2 is provided between the second magnets 50 in the circumferential direction between adjacent magnetic pole portions 28, and the maximum circumferential width of the second gap G2 is larger than the maximum circumferential width of the first gap G1, making it possible to achieve high output density without arranging the first magnet 40 and the second magnet 50 without a gap in the circumferential direction.

[0050] Therefore, in the rotor 20 and the rotating electric machine 1 of this embodiment, it is no longer necessary to manufacture the circumferential dimensions of the first magnet 40 and the second magnet 50 with high precision, and therefore they can be manufactured easily.

[0051] Furthermore, in the rotor 20 and rotating electric machine 1 of this embodiment, the cross section of the second magnet 50 perpendicular to the central axis J is rectangular, so the second magnet 50 can be manufactured more easily than if the second magnet 50 were not rectangular.

[0052] Furthermore, in the rotor 20 and rotating electric machine 1 of this embodiment, the first magnet 40 and the second magnet 50 have portions where they contact each other, so the magnetic flux flowing through the first magnet 40 can be increased compared to when there are no portions where they contact each other.

[0053] In the rotor 20 and rotating electric machine 1 of this embodiment, a first groove 24 is provided in the first support surface 23a of the rotor core 22, and an adhesive is filled between the first support surface 42 of the first magnet 40 and the first supported surface 42. A second groove 25 is provided in the second support surface 23b of the rotor core 22, and an adhesive is filled between the second support surface 52 of the second magnet 50 and the first supported surface 42 of the first magnet 40. This allows the first supported surface 42 of the first magnet 40 to be reliably fixed to the first support surface 23a via the adhesive filled in the first groove 24, and the second supported surface 52 of the second magnet 50 to be reliably fixed to the second support surface 23b via the adhesive filled in the second groove 25.

[0054] While the preferred embodiments of the present invention have been described above with reference to the accompanying drawings, it goes without saying that the present invention is not limited to these examples. The shapes and combinations of the components shown in the above examples are merely examples, and various modifications can be made based on design requirements, etc., without departing from the spirit of the present invention.

[0055] For example, in the above embodiment, the shapes of the magnets and the outer core are not limited to the examples described in the above embodiment and modified examples, and the number of poles of the rotor and the number of slots of the stator are not limited to those in the above embodiment.

[0056] In the above embodiment, the present invention is applied to a surface permanent magnet (SPM) rotor, but may also be applied to an interior permanent magnet (IPM) rotor.

[0057] The rotating electric machine to which the present invention is applied is not limited to a motor, but may also be a generator. In this case, the rotating electric machine may be a three-phase AC generator. The application of the rotating electric machine is not particularly limited. The rotating electric machine may be mounted, for example, on a vehicle or on equipment other than a vehicle. The number of poles and the number of slots of the rotating electric machine are not particularly limited. The coils in the rotating electric machine may be configured in any winding method. The configurations described above in this specification can be combined as appropriate within a range that is not mutually contradictory.

[0058] The present technology can be configured as follows. (1) a rotor provided in a rotating electric machine, facing a stator and rotating about a central axis, the rotor comprising: a plurality of magnetic pole portions arranged along a circumferential direction about the central axis; and a rotor core supporting the magnetic pole portions from one radial side, wherein the magnetic pole portions have first magnets whose magnetization direction is the radial direction, and second magnets which are arranged symmetrically circumferentially outside the first magnets and whose magnetization direction is inclined circumferentially with respect to the radial direction, a first gap being provided between the first magnets and the second magnets in the circumferential direction, and a second gap being provided between the second magnets in the circumferential direction between adjacent magnetic pole portions, and the maximum circumferential width of the second gap is greater than the maximum circumferential width of the first gap. (2) The rotor according to (1), wherein the maximum width of the first gap and the maximum width of the second gap increase radially outward. (3) The rotor according to (2), wherein the first magnet and the second magnet have portions that are in contact with each other. (4) The rotor according to any one of (1) to (3), wherein the second magnet has a rectangular cross section perpendicular to the central axis. (5) A rotor as described in any one of (1) to (4), wherein the first magnet has a first supported surface facing radially inward, the second magnet has a second supported surface facing radially inward, and the rotor core has a first supporting surface that supports the first supported surface and a second supporting surface that supports the second supported surface. (6) The rotor described in (5), wherein the first supporting surface has a first groove portion formed between it and the first supported surface and into which adhesive is filled, and the second supporting surface has a second groove portion formed between it and the second supported surface and into which adhesive is filled. (7) The rotor described in (6), wherein the second support surface is a plane perpendicular to the radial direction, and a ridge line is provided at the intersection of the second support surfaces that support the second supported surfaces of the second magnets of adjacent magnetic pole portions, and the ridge line is exposed to the second gap. (8) A rotating electric machine comprising: the rotor according to any one of (1) to (7); and the stator facing the rotor. [Explanation of symbols]

[0059] REFERENCE SIGNS LIST 1... rotating electric machine, 20... rotor, 22... rotor core, 23a... first support surface, 23b... second support surface, 23c... ridge line, 24... first groove portion, 25... second groove portion, 28... magnetic pole portion, 30... stator, 40... first magnet, 42... first supported surface, 50... second magnet, 52... second supported surface, G1... first gap, G2... second gap, H1... first dimension, H2... second dimension, J... central axis

Claims

1. A rotor that is provided in a rotating electric machine and faces a stator and rotates around a central axis, a plurality of magnetic pole portions arranged along a circumferential direction around the central axis; a rotor core supporting the magnetic pole portion from one radial side, The magnetic pole portion is a first magnet having a magnetization direction in the radial direction; and second magnets arranged symmetrically around the circumferential outside of the first magnets and having a magnetization direction inclined in the circumferential direction with respect to the radial direction, a first gap is provided between the first magnet and the second magnet in the circumferential direction; a second gap is provided between the second magnets in the circumferential direction of the adjacent magnetic pole portions, The maximum width of the second gap in the circumferential direction is greater than the maximum width of the first gap in the circumferential direction. Rotor.

2. The maximum width of the first gap and the maximum width of the second gap increase toward the outside in the radial direction. The rotor of claim 1 .

3. The first magnet and the second magnet have a portion that contacts with each other. The rotor of claim 1 .

4. The second magnet has a rectangular cross section perpendicular to the central axis. The rotor of claim 1 .

5. the first magnet has a first supported surface facing radially inward, the second magnet has a second supported surface facing radially inward, The rotor core is a first supporting surface that supports the first supported surface; a second supporting surface that supports the second supported surface; having The rotor of claim 1 .

6. a first groove portion is provided in the first supporting surface and filled with adhesive between the first supporting surface and the first supported surface; The second supporting surface has a second groove portion formed therein and filled with adhesive between the second supporting surface and the second supported surface. The rotor according to claim 5 .

7. the second support surface is a plane perpendicular to the radial direction, a ridgeline is provided at an intersection between the second supporting surfaces that support the second supported surfaces of the second magnets of the adjacent magnetic pole portions, the ridge line is exposed to the second gap; The rotor according to claim 5 .

8. A rotor according to any one of claims 1 to 7; the stator facing the rotor, Rotating electric motor.

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