WO2023199709A1

WO2023199709A1 - Rotary electric machine

Info

Publication number: WO2023199709A1
Application number: PCT/JP2023/011173
Authority: WO
Inventors: 鈴音水野; 裕樹高橋
Original assignee: 株式会社デンソー
Priority date: 2022-04-14
Filing date: 2023-03-22
Publication date: 2023-10-19
Also published as: JP2023157343A

Abstract

The direction of the easy magnetization axis of a magnet (32, 132, 232) constituting a magnet part (22) of a rotary electric machine (10) is oriented so as to be parallel to the d axis which is the magnetic pole center nearer to the d axis-side, the d axis being the magnetic pole center, than to a q axis-side, the q axis being a magnetic pole boundary, so that a magnet path is formed along the easy magnetization axis. As viewed from the axial direction of the rotor, the easy magnetization axis is oriented so as to be focused toward a predetermined orientation point (P1, P10, P100), or alternatively, so as to expand radially from the orientation point. Additionally, the orientation point is set further to the armature-side than the magnet part on the d axis.

Description

rotating electric machine

Cross-reference of related applications

This application is based on Japanese Application No. 2022-067193 filed on April 14, 2022, and the contents thereof are incorporated herein.

The disclosure in this specification relates to a rotating electrical machine.

Conventionally, in order to make the surface magnetic flux density of a magnet approximate to a sine wave, various efforts have been made to the orientation state of the magnet (for example, Patent Document 1). In the disclosure of Patent Document 1, the axis of easy magnetization of the magnet is oriented such that the closer it gets to the d-axis, which is the center of the magnetic pole, the more parallel it becomes to the d-axis. As a result, the closer the magnetic flux is to the d-axis, the more the magnetic flux can be concentrated, and the surface magnetic flux density of the magnet can be made closer to a sine wave shape.

JP2019-122237A

By the way, in order to realize a high-torque rotating electric machine, it was found that there is room for further improvement in how to concentrate the magnetic flux.

The present disclosure has been made in view of the above circumstances, and its main purpose is to provide a high-torque rotating electrical machine.

A first means for solving the above problem includes a field element having a magnet portion including a plurality of magnetic poles with alternating polarities in the circumferential direction, and an armature disposed facing the magnet portion in the radial direction. A rotating electrical machine comprising either the field element or the armature as a rotor, wherein the axis of easy magnetization in the magnets constituting the magnet section is the q-axis whose direction is the magnetic pole boundary. The magnets are oriented parallel to the d-axis, which is the magnetic pole center, on the d-axis side, which is the magnetic pole center, compared to the side of the rotor. Viewed from the axial direction, the axis of easy magnetization is oriented so as to concentrate toward a predetermined orientation point or to spread radially from the orientation point, and the orientation point is aligned with the d-axis. In the above, the gist is that the magnet portion is set closer to the armature than the magnet portion.

As a result, the magnet magnetic flux on the d-axis is strengthened, and changes in the magnetic flux near the q-axis are suppressed. Therefore, it is possible to suitably realize a magnet portion in which the surface magnetic flux changes gradually from the q-axis to the d-axis in each magnetic pole. At the same time, it becomes possible to achieve high torque.

In the second means, in the first means, the orientation point is set to be located within a region of the armature on the d-axis.

This makes it possible to concentrate magnetic flux and achieve higher torque.

In a third means, in the second means, the orientation point is set to be located closer to the field element than the center of the region of the armature in the radial direction of the rotor.

This makes it possible to concentrate magnetic flux and achieve higher torque.

In a fourth means, in the second means, the armature includes a conducting wire portion and an armature core to which the conducting wire portion is fixed, and the orientation point is on the d-axis and the conducting wire portion in the radial direction. is set at the center of

This makes it possible to concentrate magnetic flux on the conducting wire portion and achieve higher torque.

According to a fifth means, in the first means, the magnets constituting the magnet portion are composed of a plurality of layers in the radial direction of the rotor, and the first magnet is arranged on the armature side in the radial direction. The orientation point of the easy axis of magnetization in the d-axis and the orientation point of the easy axis of magnetization in the second magnet disposed on the opposite armature side than the first magnet in the radial direction are different on the d-axis.

This makes it possible to make the surface magnet density of the magnet part closer to a sine wave shape, and accordingly, it is possible to suppress cogging torque.

According to a sixth means, in the first means, the magnet portion includes a plurality of magnets arranged side by side in the circumferential direction, and a scattering prevention member made of a non-magnetic material that covers the surfaces of the plurality of magnets.

This can prevent the magnet from scattering or falling off.

In a seventh means, in the first means, the magnet section includes a plurality of magnets arranged side by side in the circumferential direction, the magnets are divided on the q-axis side, and the magnets adjacent on the q-axis A soft magnetic material is placed in the gap between them.

Thereby, in the magnetic circuit, the magnet magnetic paths between circumferentially adjacent magnets can be connected via the q-axis. This makes it possible to improve magnetic flux density and achieve high torque.

The above objects and other objects, features and advantages of the present disclosure will become more apparent from the following detailed description with reference to the accompanying drawings. The drawing is
FIG. 1 is a perspective view showing the entire rotating electrical machine in the first embodiment, FIG. 2 is a plan view of the rotating electric machine, FIG. 3 is a longitudinal cross-sectional view of the rotating electric machine, FIG. 4 is a cross-sectional view of the rotating electric machine, FIG. 5 is an exploded cross-sectional view of the rotating electric machine, FIG. 6 is a cross-sectional view of the rotor, FIG. 7 is a partial cross-sectional view showing the cross-sectional structure of the magnet unit, FIG. 8 is a partial cross-sectional view showing the cross-sectional structure of the magnet unit of the second embodiment, FIG. 9 is a partial cross-sectional view showing the cross-sectional structure of the magnet unit of the third embodiment, FIG. 10 is a partial cross-sectional view showing a cross-sectional structure of a magnet unit of a modified example, FIG. 11 is a partial cross-sectional view showing the cross-sectional structure of a modified magnet unit.

The rotating electrical machine in this embodiment is used, for example, as a vehicle power source. However, rotating electric machines can be widely used for industrial purposes, vehicles, aircraft, home appliances, OA equipment, game machines, and the like. Note that in each of the following embodiments, parts that are the same or equivalent to each other are denoted by the same reference numerals in the drawings, and the explanations thereof will be referred to for the parts with the same reference numerals.

(First embodiment)
The rotating electric machine 10 according to the present embodiment is a synchronous multiphase AC motor, and has an outer rotor structure (external rotation structure). An outline of the rotating electric machine 10 is shown in FIGS. 1 to 5. 1 is a perspective view showing the entire rotating electrical machine 10, FIG. 2 is a plan view of the rotating electrical machine 10, and FIG. 3 is a longitudinal sectional view of the rotating electrical machine 10 (a sectional view taken along line 3-3 in FIG. ), and FIG. 4 is a cross-sectional view (cross-sectional view taken along the line 4--4 in FIG. 3) of the rotating electrical machine 10, and FIG. 5 is an exploded sectional view showing the components of the rotating electrical machine 10 in an exploded manner. In the following description, in the rotating electrical machine 10, the direction in which the rotating shaft 11 extends is referred to as the axial direction, the direction extending radially from the center of the rotating shaft 11 is referred to as the radial direction, and the direction extending circumferentially around the rotating shaft 11 as the center is referred to as the circumferential direction. direction.

The rotating electrical machine 10 is roughly divided into a rotating electrical machine main body having a rotor 20, a stator unit 50, and a busbar module 200, and a housing 241 and a housing cover 242 provided to surround the rotating electrical machine main body. All of these members are arranged coaxially with respect to the rotating shaft 11 that is integrally provided to the rotor 20, and are assembled in the axial direction in a predetermined order to configure the rotating electrical machine 10. The rotating shaft 11 is supported by a pair of

bearings

12 and 13 provided in the stator unit 50 and the housing 241, respectively, and is rotatable in this state. Note that the

bearings

12 and 13 are, for example, radial ball bearings having an inner ring, an outer ring, and a plurality of balls arranged between them. The rotation of the rotating shaft 11 causes, for example, the axle of the vehicle to rotate. The rotating electrical machine 10 can be mounted on a vehicle by fixing the housing 241 to a vehicle body frame or the like.

In the rotating electrical machine 10, the stator unit 50 is provided so as to surround the rotating shaft 11, and the rotor 20 is arranged on the radially outer side of the stator unit 50. The stator unit 50 includes a stator 60 and a stator holder 70 assembled inside the stator 60 in the radial direction. The rotor 20 and the stator 60 are arranged to face each other in the radial direction with an air gap in between, and as the rotor 20 rotates together with the rotating shaft 11, the rotor 20 rotates on the outside of the stator 60 in the radial direction. Rotate. The rotor 20 corresponds to a "field element" and the stator 60 corresponds to an "armature."

The stator 60 has a stator winding 61 and a stator core 62. Note that the stator winding 61 corresponds to the "armature winding". In this embodiment, the stator 60 has a slotless structure that does not have teeth for forming slots, but teeth may be provided.

FIG. 6 is a longitudinal cross-sectional view of the rotor 20. As shown in FIG. 6, the rotor 20 includes a substantially cylindrical rotor carrier 21 and an annular magnet unit 22 fixed to the rotor carrier 21. As shown in FIG. The rotor carrier 21 has a cylindrical portion 23 having a cylindrical shape and an end plate portion 24 provided at one end in the axial direction of the cylindrical portion 23, and is configured by integrating these parts. . In the rotor carrier 21, a magnet unit 22 is fixed to the radially inner side of the cylindrical portion 23 in an annular shape. A through hole 24a is formed in the end plate portion 24, and the rotating shaft 11 is fixed to the end plate portion 24 by a fastener 25 such as a bolt while being inserted into the through hole 24a. The rotating shaft 11 has a flange 11a extending in a direction intersecting (orthogonal to) the axial direction, and the rotor carrier 21 is attached to the rotating shaft 11 in a state where the flange 11a and the end plate portion 24 are surface-joined. is fixed.

The magnet unit 22 includes a cylindrical magnet holder 31, a plurality of magnets 32 fixed to the inner circumferential surface of the magnet holder 31, and a magnet holder 31 on the opposite side from the end plate portion 24 of the rotor carrier 21 on both sides in the axial direction. It has a fixed end plate 33. In this embodiment, the magnet holder 31 corresponds to a "magnet holder". The end plate 33 is formed in an annular shape and is configured to cover part or all of the axial end surface of the magnet 32 to prevent the magnet 32 from falling off. Each magnet 32 is fixed to the inner peripheral surface of the magnet holder 31 with an adhesive or the like.

The magnet holder 31 has the same length dimension as the magnet 32 in the axial direction. The magnet 32 is surrounded by the magnet holder 31 from the outside in the radial direction. The magnet holder 31 and the magnet 32 are fixed in contact with an end plate 33 at one end in the axial direction. The magnet unit 22 corresponds to a "magnet section".

FIG. 7 is a partial cross-sectional view showing the cross-sectional structure of the magnet unit 22. In the magnet unit 22, the magnets 32 are arranged in parallel along the circumferential direction of the rotor 20 so that their polarities alternate. Thereby, the magnet unit 22 has a plurality of magnetic poles in the circumferential direction. The magnet 32 is a polar anisotropic permanent magnet, using a sintered neodymium magnet having an intrinsic coercive force of 400 [kA/m] or more and a residual magnetic flux density Br of 1.0 [T] or more. It is configured.

These plurality of magnets 32 each have a split surface on the q-axis, and the magnets 32 are arranged in contact with or close to each other. That is, in the magnet 32, one magnet constitutes one magnetic pole. Note that one magnetic pole may be composed of a plurality of magnets. For example, one magnetic pole may be configured by a combination of two magnets with split surfaces on the d-axis and the q-axis.

Next, the axis of easy magnetization of the magnet 32 will be explained. In FIG. 7, the direction of the axis of easy magnetization of the magnet 32 is indicated by an arrow. The radially inner circumferential surface (on the stator 60 side) of the magnet 32 is a magnetic flux acting surface 34 where magnetic flux is transferred. The magnet unit 22 is configured to generate magnetic flux intensively in a region near the d-axis, which is the center of the magnetic pole, on the magnetic flux acting surface 34 of the magnet 32.

To explain in detail, the axis of easy magnetization in each magnet 32 of this embodiment is a linear easy axis of magnetization, and the angle (inclination angle α) with respect to the radial direction gradually changes depending on the position in the circumferential direction. As shown in FIG. 7, the axis of easy magnetization of the magnet 32 of this embodiment is oriented so that it is concentrated toward the orientation point P1 set on the d-axis, or so as to spread radially from the orientation point P1. has been done. In the magnet 32 in the middle of FIG. 7, the direction of the axis of easy magnetization (magnetization direction, magnetization vector) is shown to be concentrated at the orientation point P1, but since the polarity is different in the magnets 32 adjacent to the magnet 32, It shows how the magnetization direction spreads radially from the orientation point P1.

As shown in FIG. 7, this orientation point P1 is set to be located within the region of the stator 60 on the d-axis. The region of the stator 60 is defined as the area from the inner circumferential surface of the stator winding 61 (the surface closest to the rotor 20) to the outer circumferential surface of the stator core 62 (the farthest side from the rotor 20) in the radial direction. It is within the area between the two surfaces.

To explain in more detail, the orientation point P1 is set to be located closer to the rotor 20 than the center of the region of the stator 60 in the radial direction of the rotor 20. Note that, as in this embodiment, it is more preferable that the orientation point P1 is set at the center of the stator winding 61 in the radial direction on the d-axis.

As described above, since the axis of easy magnetization is oriented, as shown in FIG. The inclination angle α of each axis of easy magnetization is set to be small with respect to the radial direction so as to be parallel to the central d-axis. It can also be said that the axis of easy magnetization of the magnet 32 is oriented so that the orientation thereof is more parallel to the d-axis on the d-axis side, which is the magnetic pole center, than on the q-axis side, which is the magnetic pole boundary. A magnet magnetic path is formed along this axis of easy magnetization.

As described above, in the magnet 32, the magnet magnetic path is formed in a straight line, but has an inclination with respect to the radial direction, so the length of the magnet magnetic path is longer than the radial thickness of the magnet 32. is getting longer. This increases the permeance of the magnet 32, making it possible to exhibit the same ability as a magnet with a larger amount of magnets, even though the amount of magnets is the same.

The magnet 32 has a magnet magnetic path as described above, and the N and S poles of circumferentially adjacent magnets 32 face each other on the q-axis. Therefore, permeance near the q-axis can be improved. Furthermore, since the magnets 32 on both sides of the q-axis attract each other, these magnets 32 can maintain contact with each other. Therefore, it also contributes to improving permeance.

In the magnet unit 22, magnetic flux flows between adjacent N and S poles of each magnet 32, so the magnet magnetic path is longer than, for example, a radial anisotropic magnet. Further, the axis of easy magnetization of the magnet 32 is oriented so as to concentrate toward the orientation point P1 set on the d-axis, or to spread radially from the orientation point P1. Therefore, the magnetic flux density distribution becomes close to a sine wave. As a result, unlike the magnetic flux density distribution of a radial anisotropic magnet, the magnetic flux can be concentrated on the center side of the magnetic pole, making it possible to increase the torque of the rotating electric machine 10. That is, according to each of the magnets 32 having the above configuration, the magnet magnetic flux on the d-axis in the magnet unit 22 is strengthened, and changes in the magnetic flux near the q-axis are suppressed. Thereby, it is possible to suitably realize the magnet unit 22 in which the surface magnetic flux changes gradually from the q-axis to the d-axis in each magnetic pole.

The effects of the first embodiment will be explained.

(1) When viewed from the axial direction, the axis of easy magnetization of the magnet 32 is oriented so as to concentrate toward a predetermined orientation point P1 or to spread radially from the orientation point P1. The orientation point P1 is set closer to the stator 60 than the magnet unit 22 on the d-axis. In the magnet unit 22, the magnet magnetic flux on the d-axis is strengthened, and changes in the magnetic flux near the q-axis are suppressed. Thereby, it is possible to suitably realize the magnet unit 22 in which the surface magnetic flux change from the q-axis to the d-axis in each magnetic pole is smooth in the shape of a sine wave. Furthermore, it is possible to concentrate magnetic flux on the d-axis and achieve high torque.

(2) The orientation point P1 is set to be located within the region of the stator 60 on the d-axis. More specifically, the orientation point P1 is set to be located closer to the rotor 20 than the center of the region of the stator 60 in the radial direction. In this embodiment, the orientation point P1 is set at the center of the stator winding 61 in the radial direction on the d-axis. Thereby, the magnetic flux from the magnet 32 can be concentrated on the stator winding 61, and high torque can be achieved.

(Second embodiment)
In the first embodiment, an outer rotor structure (external rotation structure) is adopted, but an inner rotor structure (internal rotation structure) may be adopted. The axis of easy magnetization of the magnet 132 in this case is illustrated in FIG.

As shown in FIG. 8, the radially outer (stator 60 side) circumferential surface of the magnet 132 is a magnetic flux action surface 134 where magnetic flux is transferred. The easy axis of magnetization in each magnet 132 of the second embodiment is a linear easy axis of magnetization, and the angle (inclination angle α) with respect to the radial direction gradually changes depending on the position in the circumferential direction. As shown in FIG. 8, the axis of easy magnetization of the magnet 132 of this embodiment is oriented so that it is concentrated toward the orientation point P10 set on the d-axis, or so as to spread radially from the orientation point P10. has been done.

As shown in FIG. 8, this orientation point P10 is set to be located within the area of the stator 60 on the d-axis. To explain in more detail, the orientation point P1 is set to be located closer to the rotor 20 than the center of the area of the stator 60 in the radial direction of the rotor 20. Note that it is more preferable that the orientation point P10 is set at the center of the stator winding 61 in the radial direction on the d-axis as in the present embodiment.

As described above, since the axis of easy magnetization is oriented, as shown in FIG. The inclination angle α of each axis of easy magnetization is set to be small with respect to the radial direction so as to be parallel to the central d-axis. A magnet magnetic path is formed along this axis of easy magnetization.

(Third embodiment)
A part of the configuration of the magnet unit 22 of the first embodiment may be changed as described below. As shown in FIG. 9, in the third embodiment, the rotor 20 is configured as an embedded magnet rotor (IPM rotor), and includes a rotor core 231 as a field core, and a rotor core 231 as a field core. A plurality of magnets 232 are embedded and fixed in the magnet.

As shown in FIG. 9, the magnet 232 of the third embodiment is composed of multiple layers in the radial direction. In the third embodiment, the magnet 232 is comprised of two layers, an inner layer and an outer layer, in the radial direction. The magnet 232 on the inside (on the stator 60 side) may be referred to as a first magnet 232a, and the magnet 232 on the outside (on the side opposite to the stator 60) may be referred to as a second magnet 232b.

Next, the easy magnetization axis of the first magnet 232a will be explained. In FIG. 9A, the direction of the axis of easy magnetization (magnetization direction, magnetization vector) of the first magnet 232a is indicated by an arrow. The easy axis of magnetization in the first magnet 232a is a linear easy axis of magnetization, as in the first embodiment, and the angle (inclination angle α) with respect to the radial direction gradually changes depending on the position in the circumferential direction. As shown in FIG. 9(a), the axis of easy magnetization of the first magnet 232a is concentrated toward the orientation point P1 set on the d-axis, similar to the magnet 32 of the first embodiment, or , are oriented to spread radially from the orientation point P1. Note that in FIG. 9(a), the direction of the axis of easy magnetization (arrow) is shown to be concentrated toward the orientation point P1, but the direction of the arrow may be opposite depending on the polarity of the first magnet 232a. Needless to say. In other words, if the polarity changes, the direction of the axis of easy magnetization points in a direction that radially spreads from the orientation point P1.

Next, the easy magnetization axis of the second magnet 232b will be explained. In FIG. 9(b), the direction of the axis of easy magnetization (magnetization direction, magnetization vector) of the second magnet 232b is indicated by an arrow. The axis of easy magnetization in the second magnet 232b is a straight axis of easy magnetization, and the angle (inclination angle β) with respect to the radial direction gradually changes depending on the position in the circumferential direction. As shown in FIG. 9(b), unlike the first magnet 232a, the axis of easy magnetization of the second magnet 232b is concentrated toward the orientation point P100 set on the d-axis, or It is oriented so that it spreads radially from the center. In addition, in FIG. 9(b), the direction of the axis of easy magnetization (arrow) is shown to be concentrated toward the orientation point P100, but the direction of the arrow may be opposite depending on the polarity of the second magnet 232b. Needless to say.

The orientation point P100 on the easy axis of magnetization of the second magnet 232b is set on the d-axis to be further away from the magnet unit 22 in the radial direction than the orientation point P1 on the easy axis of the first magnet 232a.

As shown in FIG. 9, this orientation point P100 is set to be located within the region of the stator 60 on the d-axis. In this embodiment, an orientation point P100 is set on the stator core 62. Note that the orientation point P100 may be set to be located closer to the rotor 20 than the center of the region of the stator 60 in the radial direction of the rotor 20, and the orientation point P100 may be set to be located closer to the rotor 20 than the center of the area of the stator 60 in the radial direction of the rotor 20, and It may be set to . Furthermore, the orientation point P100 of the second magnet 232b and the orientation point P1 of the first magnet 232a may be set at the same position.

According to the third embodiment, the following effects can be obtained in addition to the effects of the first embodiment. That is, the orientation point P1 of the easy axis of magnetization in the first magnet 232a and the orientation point P100 of the easy axis of magnetization in the second magnet 232b are set to be different on the d-axis. This allows the surface magnetic flux density of the magnet unit 22 to be shaped into a sine wave shape, compared to the case where the orientation point P1 of the easy axis of magnetization in the first magnet 232a and the orientation point P100 of the easy axis of magnetization in the second magnet 232b are made to match. It becomes possible to get closer.

Furthermore, the orientation point P1 of the axis of easy magnetization in the first magnet 232a on the side closer to the stator winding 61 was set at the center of the stator winding 61. As a result, compared to the case where the orientation point P100 of the axis of easy magnetization in the second magnet 232b on the side far from the stator winding 61 is set at the center of the stator winding 61 instead of the orientation point P1, the torque can be achieved.

Note that the configuration of the third embodiment may be adopted in a rotating electric machine having an inner rotor structure like the second embodiment. Further, instead of the IPM rotor, an SPM rotor (surface magnet type rotor) like the first embodiment may be used. In this case, the first magnet 232a and the second magnet 232b are directly stacked and fixed with adhesive or the like. Further, the magnet unit 22 may be configured with three or more layers of magnets in the radial direction.

(Modified example)
A modification example in which a part of the configuration of the above embodiment is changed will be described.

- In the above embodiment, the stator side circumferential surfaces of the

magnets

32, 132, 232 may be covered with a thin protective sheet 41, as shown in FIG. The protective sheet 41 may be made of, for example, a nonmagnetic metal, copper with low magnetic resistance, or a nonmagnetic material such as resin. Thereby, scattering and falling off of the

magnets

32, 132, 232 can be suppressed. The protective sheet 41 corresponds to a scattering prevention member.

- In the above embodiment, as shown in FIG. 11, the soft magnetic material 42 may be interposed in the gap between the

magnets

32, 132, 232 in the circumferential direction on the q-axis side. By interposing the soft magnetic body 42, the magnet magnetic paths of circumferentially

adjacent magnets

32, 132, 232 can be connected via the q-axis, and the surface magnetic flux density can be improved. Moreover, magnetic flux leakage can be suppressed while reducing the amount of magnets.

- In the above embodiment, the axis of easy magnetization is formed in a straight line, but it may be formed in a curved or arcuate shape.

Characteristic configurations extracted from each of the embodiments described above will be described below.
[Configuration 1]
A field element (20) having a magnet part (22) including a plurality of magnetic poles with alternating polarities in the circumferential direction, and an armature (60) disposed facing the magnet part in the radial direction. , in a rotating electric machine (10) in which one of the field element and the armature is a rotor,
The axis of easy magnetization in the magnets (32, 132, 232) constituting the magnet section is oriented on the d-axis side, which is the magnetic pole center, compared to the q-axis side, which is the magnetic pole boundary, and the d-axis, which is the magnetic pole center. , and a magnet magnetic path is formed along the axis of easy magnetization.
When viewed from the axial direction of the rotor, the axis of easy magnetization is oriented so as to concentrate toward a predetermined orientation point (P1, P100) or to spread radially from the orientation point. Ori,
In the rotating electric machine, the orientation point is set closer to the armature than the magnet portion on the d-axis.
[Configuration 2]
The rotating electric machine according to configuration 1, wherein the orientation point is set to be located within a region of the armature on the d-axis.
[Configuration 3]
The rotating electric machine according to configuration 1 or 2, wherein the orientation point is set to be located closer to the field element than the center of the area of the armature in the radial direction of the rotor.
[Configuration 4]
The armature includes a conducting wire portion (61) and an armature core (62) to which the conducting wire portion is fixed,
The rotating electrical machine according to any one of configurations 1 to 3, wherein the orientation point is set at the center of the conducting wire portion in the radial direction on the d-axis.
[Configuration 5]
The magnets constituting the magnet section are composed of multiple layers in the radial direction of the rotor,
an orientation point (P1) of the axis of easy magnetization in the first magnet (232a) disposed on the armature side in the radial direction; and a second magnet disposed on the anti-armature side with respect to the first magnet in the radial direction. The rotating electric machine according to any one of configurations 1 to 4, wherein the orientation point (P100) of the easy axis of magnetization in (232b) is different on the d-axis.
[Configuration 6]
The rotating magnet according to any one of configurations 1 to 5, wherein the magnet portion includes a plurality of magnets arranged side by side in the circumferential direction, and a scattering prevention member (41) made of a non-magnetic material that covers the surface of the plurality of magnets. Electric machine.
[Configuration 7]
The magnet section includes a plurality of magnets arranged side by side in the circumferential direction,
The rotating electric machine according to any one of configurations 1 to 6, wherein the magnet is divided on the q-axis side, and a soft magnetic material (42) is arranged in a gap between the adjacent magnets on the q-axis. .

Although the present disclosure has been described based on examples, it is understood that the present disclosure is not limited to the examples or structures. The present disclosure also includes various modifications and equivalent modifications. In addition, various combinations and configurations, as well as other combinations and configurations that include only one, more, or fewer elements, are within the scope and scope of the present disclosure.

Claims

A field element (20) having a magnet part (22) including a plurality of magnetic poles with alternating polarities in the circumferential direction, and an armature (60) disposed facing the magnet part in the radial direction. , in a rotating electric machine (10) in which one of the field element and the armature is a rotor,
The axis of easy magnetization in the magnets (32, 132, 232) constituting the magnet section is oriented on the d-axis side, which is the magnetic pole center, compared to the q-axis side, which is the magnetic pole boundary, and the d-axis, which is the magnetic pole center. , and a magnet magnetic path is formed along the axis of easy magnetization.
Viewed from the axial direction of the rotor, the axis of easy magnetization is oriented so as to concentrate toward predetermined orientation points (P1, P10, P100) or to spread radially from the orientation point. has been
In the rotating electric machine, the orientation point is set closer to the armature than the magnet portion on the d-axis.
The rotating electric machine according to claim 1, wherein the orientation point is set to be located within a region of the armature on the d-axis.
The rotating electric machine according to claim 2, wherein the orientation point is set to be located closer to the field element than the center of the region of the armature in the radial direction of the rotor.
The armature includes a conducting wire portion (61) and an armature core (62) to which the conducting wire portion is fixed,
The rotating electrical machine according to claim 2, wherein the orientation point is set at the center of the conducting wire portion in the radial direction on the d-axis.
The magnets constituting the magnet section are composed of multiple layers in the radial direction of the rotor,
an orientation point (P1) of the axis of easy magnetization in the first magnet (232a) disposed on the armature side in the radial direction; and a second magnet disposed on the anti-armature side with respect to the first magnet in the radial direction. The rotating electric machine according to claim 1, wherein the orientation point (P100) of the easy axis of magnetization at (232b) is different on the d-axis.
The rotating electrical machine according to claim 1, wherein the magnet portion includes a plurality of magnets arranged in a circumferential direction, and a scattering prevention member (41) made of a non-magnetic material that covers the surfaces of the plurality of magnets.
The magnet section includes a plurality of magnets arranged side by side in the circumferential direction,
The rotating electric machine according to claim 1, wherein the magnet is divided on the q-axis side, and a soft magnetic body (42) is disposed in a gap between the adjacent magnets on the q-axis.