JP7259653B2 - Rotor of rotating electric machine and rotating electric machine - Google Patents

Description

The present invention relates to a rotor of a permanent magnet type rotating electric machine.

As a permanent magnet rotating electric machine, for example, a Surface Permanent Magnet (SPM) rotating electric machine in which a plurality of permanent magnets are fixed to the surface of a rotor shaft by press-fitting a retaining ring is known.

As the above-described retaining ring, for example, a configuration in which steel plates punched into a ring shape are laminated and integrated by caulking or welding has been proposed (Patent Document 1).

JP-A-2004-64887

For example, if a retaining ring made of a nonmagnetic material such as resin is applied to the rotor, the magnetic resistance between the rotor and the stator increases, and the torque of the rotating electric machine tends to decrease.
On the other hand, if a retaining ring in which laminated steel plates are integrated by caulking or welding is applied to the above rotor, stress tends to concentrate on the portion where the steel plates are fixed during press-fitting during assembly or during high-speed rotation of the rotating electric machine. Ensuring the strength of the retaining ring is still difficult.

SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide a rotor capable of suppressing a decrease in the torque of a rotating electric machine and having a retaining ring with high strength.

A rotor of a rotary electric machine according to one aspect of the present invention includes a rotor shaft, a plurality of permanent magnets arranged on an outer peripheral surface of the rotor shaft, and a plurality of permanent magnets fitted to the outer peripheral side of the permanent magnets, which are arranged on the outer peripheral side of the rotor shaft. A retaining ring for fixing the permanent magnets to the surface, and a tapered surface provided adjacent to the arrangement area of the permanent magnets in the axial direction of the rotor shaft and tapered in diameter in a direction away from the first end facing the permanent magnets. a ring guide having a The retaining ring is formed by stacking magnetic metal plates by surface bonding along the axial direction. The ring guide part is formed integrally with the rotor shaft, and the rotor is fixed to a locking part that receives the retaining ring in the axial direction and on the opposite side of the locking part across the retaining ring in the axial direction. and a stopper that sandwiches the retaining ring with the portion.

In one aspect of the rotor described above, the outer diameter of the first end of the ring guide may be larger than the inner diameter of the retaining ring. Further, the ring guide portion may guide the retaining ring toward the permanent magnet while expanding the diameter of the retaining ring from the second end side facing the first end portion.
In one aspect of the rotor described above, the retaining ring may be formed by laminating metal plates by adhesion or impregnation with resin.

In the rotor of one aspect described above, the ring guide portions may be provided on both sides of the permanent magnet arrangement region in the axial direction.
In one aspect of the rotor described above, the ring guide portion may be formed of a ring member fixed to the outer peripheral surface of the rotor shaft.

A rotating electric machine according to an aspect of the present invention includes a stator and the rotor according to the aspect described above.

ADVANTAGE OF THE INVENTION According to one aspect of the present invention, it is possible to provide a rotor capable of suppressing a decrease in torque of a rotating electric machine and obtaining high strength of a retaining ring.

1A is a diagram showing a configuration example of a rotating electric machine according to a first embodiment, and FIG. 1B is a diagram showing a rotor of FIG. 1A; FIG. (A) is a sectional view taken along the IIa-IIa line in FIG. 1(B), (B) is a sectional view taken along the IIb-IIb line in FIG. It is a sectional view taken along line IIc. It is a figure which shows the press-fit process of the retaining ring to a rotor shaft. 4A is a perspective view showing a configuration example of a retaining ring, and FIG. 4B is a cross-sectional view of a portion surrounded by a broken line in FIG. (A) is a view showing the rotor shaft before the retaining ring is crimped, and (B) is an enlarged view of the portion surrounded by the dashed line in FIG. 5(A). It is a figure which shows the rotor shaft in 2nd Embodiment. It is a figure which shows the structural example of the rotor of 2nd Embodiment. It is a figure which shows the structural example of the rotor of 3rd Embodiment.

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the present invention will be described with reference to the drawings.
In order to facilitate the understanding of the description in the embodiments, structures and elements other than the main part of the present invention will be described with simplification or omission. Moreover, in the drawings, the same reference numerals are given to the same elements. It should be noted that the shape, dimensions, etc. of each element shown in the drawings are schematically shown, and do not represent the actual shape, dimensions, etc.

<First embodiment>
FIG. 1A is a diagram showing a configuration example of a rotating electric machine according to the first embodiment, and FIG. 1B is a diagram showing the rotor of FIG. 1A. 2(A) is a cross-sectional view along the line IIa-IIa of FIG. 1(B), FIG. 2(B) is a cross-sectional view along the line IIb-IIb of FIG. 1(B), and FIG. 2 is a sectional view taken along the line IIc-IIc of FIG. 1(B); FIG.

A rotary electric machine 100 of the first embodiment is a surface magnet type rotary electric machine in which a plurality of permanent magnets 13 are fixed to the surface of a rotor shaft 11 , and has a rotor 10 and a stator 20 . The rotors 10 are supported by bearings (not shown) so as to be rotatable in the circumferential direction.

The stator 20 is arranged on the outer circumference of the rotor 10 across an air gap. The stator 20 has a plurality of coils (not shown) wound around the yoke in the circumferential direction. In the rotating electric machine 100, the magnetic field of the stator 20 is sequentially switched by current control of each coil, so that the rotor 10 including the permanent magnets 13 rotates in the circumferential direction.

The rotor 10 has a rotor shaft 11 , a pair of end plates 12 a and 12 b , multiple permanent magnets 13 and multiple retaining rings 14 .

The rotor shaft 11 is a columnar member having a circular cross section in a radial direction orthogonal to the axial direction, and has a large diameter portion 11a and a small diameter portion 11b along the direction of the central axis C1 (hereinafter referred to as the axial direction). . The small diameter portion 11b of the rotor shaft 11 is provided on one end side (the right side in FIG. 1) of the rotor shaft 11 and has an outer diameter smaller than that of the large diameter portion 11a. The small diameter portion 11b is connected to the end of the large diameter portion 11a so as to be concentric with the large diameter portion 11a.

A plurality of permanent magnets 13 for constituting the magnetic poles of the rotor 10 are arranged on the outer periphery of the small diameter portion 11b. Each permanent magnet 13 has a common shape, has an arc-shaped inner peripheral surface corresponding to the outer diameter of the small diameter portion 11b, and has a dimension corresponding to the axial direction of the rotor 10 and a thickness in the radial direction. are strips in which are constant respectively. The permanent magnets 13 are arranged adjacent to each other along the circumferential and axial directions of the rotor shaft 11 . The permanent magnets 13 are attached to the rotor shaft 11 such that the magnetic poles of the permanent magnets 13 adjacent in the circumferential direction are alternated and the outer peripheral surfaces of the permanent magnets 13 are flush with each other.

A pair of end plates 12 a and 12 b are fixed to the outer circumference of the small diameter portion 11 b of the rotor shaft 11 . The end plates 12a and 12b are an example of a ring guide portion, and are annular members having a tapered surface 12c on the outer peripheral surface. The tapered surfaces 12c of the end plates 12a and 12b gradually decrease in radial thickness from the first end toward the second end in the axial direction, and decrease in diameter away from the first end. do. The thickness d2 on the second end side of the end plate 12b shown in FIG. 2C is thinner than the thickness d1 on the first end side of the end plate 12b shown in FIG. , d2<d1).

The end plates 12a and 12b are arranged on the rotor shaft 11 so as to sandwich the arrangement area of the permanent magnets 13 from both sides in the axial direction. The end plates 12a and 12b are fixed on both sides of the area where the permanent magnets 13 are arranged, thereby functioning to restrict the movement of the permanent magnets 13 in the axial direction.

The first end plate 12a shown on the left side in FIG. 11 is attached. The second end plate 12b shown on the right side in FIG. 1 faces one end of the rotor shaft 11 (right end in the drawing) on the tapered second end side, and the first end side It is attached to the rotor shaft 11 so as to face the permanent magnets 13 .

The end plates 12 a , 12 b are arranged on the rotor shaft 11 so as to radially expand toward the first end facing the permanent magnets 13 . Therefore, when the retaining ring 14 is press-fitted onto the outer periphery of the rotor shaft 11 as will be described later, the tapered surfaces 12c of the end plates 12a and 12b come into surface contact with the inner peripheral surface of the retaining ring 14 to gradually disengage the retaining ring 14. It has the function of guiding while expanding the diameter.

Here, the angle of the tapered surfaces 12c of the end plates 12a and 12b is preferably set to an angle that does not cause momentary stress concentration on the retaining ring 14 during press fitting. Although not particularly limited, the angle of the tapered surface 12c may be, for example, in the range of 0.5 to 1.5 degrees with respect to the axial direction (the press-fitting direction X of the retaining ring 14 shown in FIG. 3).

Also, the end plates 12a and 12b are fixed to the small diameter portion 11b of the rotor shaft 11 by shrink fitting, for example. As a material for the end plates 12a and 12b, a non-magnetic material that can be shrink-fitted, such as aluminum or stainless steel, can be used.

In the rotor shaft 11, a plurality of retaining rings 14 are fitted along the axial direction on the outer periphery of the area where the end plates 12a, 12b and the permanent magnets 13 are arranged. The retaining ring 14 has the function of tightening the permanent magnet 13 from the outer peripheral side and firmly fixing the permanent magnet 13 to the outer peripheral surface of the rotor shaft 11 .

FIG. 4A is a perspective view showing a configuration example of a retaining ring, and FIG. 4B is a cross-sectional view of a portion surrounded by a dashed line in FIG. 4A.
The retaining ring 14 is a cylindrical member formed by stacking magnetic metal plates 14a. The retaining ring 14 is formed, for example, by laminating electromagnetic steel sheets or high-strength steel sheets. The inner diameter of the retaining ring 14 has a predetermined interference with respect to the outer diameter of the plurality of permanent magnets 13 arranged on the outer peripheral surface of the rotor shaft 11, and the permanent magnets 13 and the retaining ring 14 are tightly fitted. dimensioned. Therefore, the outer diameter of the first ends of the end plates 12 a , 12 b and the outer diameter of the permanent magnet 13 are larger than the inner diameter of the retaining ring 14 .

The metal plates 14a laminated in the retaining ring 14 are surface-joined by adhesion or resin impregnation. As a result, for example, when the retaining ring 14 is press-fitted to the outer circumference of the rotor shaft 11 or when the rotor 10 rotates at high speed, stress is evenly applied to the annular joint surface of the retaining ring 14 . Therefore, in the above case, local stress concentration on the joint portion in the circumferential direction of the retaining ring 14 is less likely to occur, and the strength of the retaining ring 14 can be improved.

As a method for manufacturing the retaining ring 14, the following method can be adopted. For example, the retaining ring 14 may be manufactured by processing a metal plate into a ring shape by punching or laser cutting, and then laminating and fixing the ring-shaped metal plates by adhesion or impregnation with resin. Alternatively, for example, the holding ring 14 may be manufactured by laminating and fixing the metal plates by adhesion or impregnation with resin, and then performing a wire cutting process on the block in which the metal plates are laminated.

It is preferable that the outer circumference of the permanent magnet 13 and the outer circumferences of the end plates 12a and 12b on the first end side are subjected to machining such as polishing so that the outer diameter dimension (height) is the same. . When the outer periphery of the permanent magnet 13 and the outer periphery of the end plates 12a and 12b on the first end side are aligned, when the retaining ring 14 is press-fitted, the inner peripheral surface of the retaining ring 14 and the inner peripheral surface of the retaining ring 14 due to the difference in the outer diameters of these members can be prevented. partial contact is less likely to occur. This further suppresses stress concentration on the inner peripheral surface of the retaining ring 14 that fixes the permanent magnet 13 and the end plates 12a and 12b.

Next, a method for manufacturing the rotor 10 of the first embodiment will be described.
FIG. 5(A) is a view showing the rotor shaft before the retaining ring is crimped, and FIG. 5(B) is an enlarged view of the portion surrounded by the dashed line in FIG. 5(A).

As shown in FIG. 5A, before the retaining ring 14 is press-fitted on the rotor shaft 11, a plurality of axially divided permanent magnets 13 are attached to the small diameter portion 11b. End plates 12a and 12b are fixed to the rotor shaft 11 by shrink fitting at both ends of the area where the permanent magnets 13 are arranged.

The end plates 12 a and 12 b are arranged on the rotor shaft 11 so as to radially expand toward the end facing the permanent magnet 13 . The second end plate 12 b shown on the right side in FIG. 5 faces one end side of the rotor shaft 11 at the tapered second end side.

As shown in FIG. 3, the retaining rings 14 are press-fitted one by one along the press-fitting direction X from one end side to the other end side of the rotor shaft 11 . For example, when press-fitting, the diameter of the retaining ring 14 gradually widens along the tapered surface 12c of the second end plate 12b, and the retaining ring 14 is press-fitted to a predetermined position with an interference bulging. As a result, the retaining ring 14 is fitted to the outer periphery of the permanent magnet 13 (or the end plates 12a and 12b). By press-fitting a plurality of retaining rings 14, the permanent magnet 13 and the end plates 12a and 12b are fixed to the rotor shaft 11 as shown in FIG. 1(B).

In the above example, the case where the retaining ring 14 is press-fitted from one direction (one end side) of the rotor shaft 11 has been described. good too. Even when the retaining ring 14 is press-fitted from the other end side of the rotor shaft 11, the diameter of the retaining ring 14 gradually widens along the tapered surface 12c of the first end plate 12a. It is possible to obtain the same effect as in the case of press-fitting from.

When the retaining ring 14 is press-fitted from both sides in the axial direction of the rotor shaft 11, compared with the case where the retaining ring 14 is press-fitted from only one side, the axial movement distance of the retaining ring 14 during press-fitting can be shortened. can also reduce the number of times it passes through the same location during press-fitting. As a result, it is possible to prevent the permanent magnet 13 or the retaining ring 14 from being scraped due to the movement of the retaining ring 14 during press fitting.

In order to reduce the load during press-fitting, a lubricant may be applied to the outer peripheral surfaces of the end plates 12a and 12b and the permanent magnet 13, and the retaining ring 14 may be press-fitted in a state in which the frictional force is reduced. .

The effects of the rotor 10 of the first embodiment will be described below.
In the rotor 10 of the first embodiment, a plurality of permanent magnets 13 arranged on the outer peripheral surface of the rotor shaft 11 are fixed by a retaining ring 14 from the outer peripheral side. The retaining ring 14 is formed by stacking magnetic metal plates along the axial direction. Therefore, the holding ring 14 has a smaller magnetic resistance than a non-magnetic material such as a resin ring, so that the motor torque can be easily generated.

The rotor shaft 11 of the first embodiment is provided with end plates 12a and 12b adjacent to the arrangement area of the permanent magnets 13 in the axial direction. The end plates 12 a and 12 b have tapered surfaces 12 c that decrease in diameter in the direction away from the first end facing the permanent magnet 13 . Therefore, when the retaining ring 14 is press-fitted onto the rotor shaft 11, the retaining ring 14 is guided toward the permanent magnet 13 along the tapered surfaces 12c of the end plates 12a and 12b while its diameter gradually widens. Thereby, the retaining ring 14 can be easily fitted on the outer peripheral side of the permanent magnet 13 .

For example, shrink fitting can be considered as a technique for fitting the retaining ring 14 to the outer peripheral side of the permanent magnet 13 . However, in order to secure a large interference by shrink fitting, it is necessary to raise the temperature of the shrink fitting, which may hinder the manufacture of the rotor 10 . According to the first embodiment, the diameter of the retaining ring 14 is expanded by the end plates 12a and 12b, so that the retaining ring 14 can be fitted without shrink fitting.

The retaining ring 14 fitted to the outer peripheral side of the permanent magnet 13 in the first embodiment is formed by laminating metal plates by surface bonding along the axial direction. Therefore, when the retaining ring 14 is press-fitted to the outer circumference of the rotor shaft 11 or when the rotor 10 rotates at high speed, stress is evenly applied to the annular joint surface of the retaining ring 14 . Therefore, local stress concentration on the joint portion in the circumferential direction of the retaining ring 14 is less likely to occur, and the strength of the retaining ring 14 can be improved.

Further, the retaining ring 14 is surface-bonded by adhesion or resin impregnation. Therefore, for example, compared to the case where laminated steel plates are fixed by caulking, in the present embodiment, the laminated steel plates are less likely to come apart and fall apart during press-fitting, and stress concentration due to plastic deformation during joining does not occur. . In addition, unlike the case where laminated steel plates are fixed by laser welding, for example, there is no possibility of short-circuiting between laminations at the welded portion and generating eddy current.

In addition, since the retaining ring 14 of the first embodiment is formed of a metal plate, it is less likely to deteriorate due to heat generated by the rotating electric machine 100 compared to a resin ring. Therefore, compared with the resin ring, the present embodiment is advantageous in that the strength is less likely to decrease due to the heat generated by the rotating electric machine.

In the following second and third embodiments, among the components of the rotating electric machine 100, the configuration of the rotor, which is different from that of the first embodiment, will be described, and illustration of the stator will be omitted. Further, in the second embodiment and the third embodiment, redundant description of elements common to the first embodiment is omitted.

<Second embodiment>
FIG. 6 is a diagram showing a rotor shaft in the second embodiment, and FIG. 7 is a diagram showing a configuration example of the rotor in the second embodiment. In the second embodiment, instead of end plates 12a and 12b, an example in which ring-shaped projections (first large diameter portion 31a and second large diameter portion 31c) are formed integrally with rotor shaft 31 is shown.

The rotor 10A of the second embodiment has a rotor shaft 31, a plurality of permanent magnets 13, and a plurality of retaining rings 14. As shown in FIG.

The rotor shaft 31 is a columnar member having a circular cross-section in a radial direction orthogonal to the axial direction, and has a first large-diameter portion 31a, a small-diameter portion 31b, and a second large-diameter portion 31c concentrically arranged along the axial direction. have a shape.

A small-diameter portion 31b of the rotor shaft 31 forms a region where the permanent magnets 13 are arranged. A plurality of permanent magnets 13 are arranged on the outer circumference of the small diameter portion 31b of the rotor shaft 31 to constitute the magnetic poles of the rotor 10A.

The first large-diameter portion 31a and the second large-diameter portion 31c are formed at positions sandwiching the arrangement area of the permanent magnet 13 from both sides in the axial direction, and have the function of restricting the movement of the permanent magnet 13 in the axial direction. bear.

A second large-diameter portion 31 c of the rotor shaft 31 shown on the right side in FIGS. 6 and 7 faces one end of the rotor shaft 31 . A tapered surface 31d is formed on the outer periphery of the second large-diameter portion 31c so that the thickness in the radial direction gradually decreases from one end side to the other end side in the axial direction. The tapered surface 31d of the second large diameter portion 31c faces one end of the rotor shaft 31 (the right end in the drawing) at its tapered end, and faces the permanent magnet 13 at the other end.

As described above, the tapered surface 31d of the second large-diameter portion 31c is formed so as to expand radially toward the end facing the permanent magnet 13 . Therefore, when the retaining ring 14 is press-fitted onto the outer circumference of the rotor shaft 31, the tapered surface 31d of the second large-diameter portion 31c comes into surface contact with the inner peripheral surface of the retaining ring 14 to gradually expand the retaining ring 14. It has the function of guiding while diagnosing. The tapered surface 31d of the second large diameter portion 31c is an example of a ring guide portion.

As shown in FIG. 7, a plurality of retaining rings 14 are fitted to the outer periphery of the permanent magnets 13 arranged on the small diameter portion 31b of the rotor shaft 31 along the axial direction. The outer circumference of the permanent magnet 13, the outer circumference of the first large-diameter portion 31a of the rotor shaft 31, and the outer circumference of the second large-diameter portion 31c on the other end side have the same outer diameter dimension (height). Machining such as polishing is preferably applied so as to

In the second embodiment, the retaining rings 14 are press-fitted one by one from one end side of the rotor shaft 31 toward the other end side (from the right side to the left side in FIG. 7). At the time of press-fitting, the retaining ring 14 is press-fitted to a predetermined position in a state in which the diameter gradually widens along the tapered surface 31d of the second large-diameter portion 31c, and the interference expands.

Also in the above-described second embodiment, the same effects as those of the above-described first embodiment can be obtained. Furthermore, the following effects can be obtained in the second embodiment.

According to the second embodiment, the second large-diameter portion 31c of the rotor shaft 31 has the function of expanding the diameter of the retaining ring 14, thereby eliminating the need to attach an end plate to the rotor shaft 31 separately. Therefore, since the number of parts attached to the rotor shaft 31 is reduced, the strength of the rotor 10A can be improved.

In addition, according to the second embodiment, since the end plate, which is a separate part from the rotor shaft 31, is not required, the manufacturing cost of the end plate and the work process until the end plate is shrink-fitted to the rotor shaft are reduced. can do.

Further, according to the second embodiment, the retaining ring 14, which is press-fitted to support the end plate from the outer peripheral side, is no longer necessary, so the usage of the retaining ring 14 can be reduced.

<Third Embodiment>
FIG. 8 is a diagram showing a configuration example of the rotor of the third embodiment. The third embodiment is a modification of the second embodiment, in which the rotor has a structure that prevents the separation of the retaining ring due to aged deterioration or the like.

The rotor 10B of the third embodiment has a rotor shaft 31, a plurality of permanent magnets 13, a plurality of retaining rings 14, and a stopper 42.

The rotor shaft 31 is a columnar member having a circular cross-section in a radial direction orthogonal to the axial direction, and has a first large-diameter portion 31a, a small-diameter portion 31b, and a second large-diameter portion 31c concentrically arranged along the axial direction. have a shape. In the third embodiment, a locking portion 41 is formed on the outer periphery of the first large diameter portion 31a. The locking portion 41 is a protrusion that abuts on the side surface of the retaining ring 14 on the left side in the figure, and has a function of receiving the retaining ring 14 in the axial direction.

Further, in a state where the retaining ring 14 is fitted to the permanent magnet 13, an annular stopper 42 is fixed to the second large diameter portion 31c. The stopper 42 is located on the opposite side of the locking portion 41 across the retaining ring 14 in the axial direction, and is fixed so as to abut on the side surface of the retaining ring 14 on the right side in the drawing. After fitting the retaining ring 14, the stopper 42 is attached to the second large diameter portion 31c by press fitting or shrink fitting. The material of the stopper 42 may be either magnetic or non-magnetic.

According to the third embodiment, the retaining ring 14 fitted to the permanent magnet 13 is sandwiched from both sides by the locking portion 41 and the stopper 42 in the axial direction. As a result, it is possible to prevent the steel plates of the retaining ring 14 from separating due to deterioration over time, resulting in a state in which the lamination opens from the end of the retaining ring 14 (overlapping of the laminated plates).

The present invention is not limited to the above embodiments, and various improvements and design changes may be made without departing from the scope of the present invention.

For example, in the above-described second embodiment, the tapered surface 31d is formed on the second large diameter portion 31c. The retaining rings 14 may be press-fitted from both sides of the rotor shaft 11 in the axial direction.

In addition, the embodiments disclosed this time should be considered in all respects to be illustrative and not restrictive. The scope of the present invention is indicated by the scope of the claims rather than the above description, and is intended to include all modifications within the scope and meaning of equivalents to the scope of the claims.

DESCRIPTION OF SYMBOLS 10, 10A, 10B... Rotor, 11, 31... Rotor shaft, 12a, 12b... End plate, 13... Permanent magnet, 14... Retaining ring, 20... Stator, 100... Rotating electric machine

Claims (5)

a rotor shaft;
a plurality of permanent magnets arranged on the outer peripheral surface of the rotor shaft;
a retaining ring fitted to the outer peripheral side of the permanent magnet and fixing the permanent magnet to the outer peripheral surface of the rotor shaft;
a ring guide portion provided adjacent to the arrangement area of the permanent magnets in the axial direction of the rotor shaft and having a tapered surface whose diameter decreases in a direction away from a first end portion facing the permanent magnets;
with
The retaining ring is formed by laminating magnetic metal plates by surface bonding along the axial direction ,
The ring guide part is formed integrally with the rotor shaft,
a locking portion that receives the retaining ring in the axial direction;
a stopper fixed on the opposite side of the locking portion across the retaining ring in the axial direction and sandwiching the retaining ring together with the locking portion;
further provide
The rotor of a rotating electric machine. the outer diameter of the first end of the ring guide is greater than the inner diameter of the retaining ring;
The ring guide portion expands the diameter of the retaining ring from a second end side facing the first end portion and guides the holding ring toward the permanent magnet.
A rotor for a rotary electric machine according to claim 1 . The retaining ring is formed by laminating the metal plates by adhesion or resin impregnation.
A rotor for a rotary electric machine according to claim 1 or 2. The ring guide portions are provided on both sides of the arrangement area of the permanent magnets in the axial direction, respectively.
The rotor of a rotary electric machine according to any one of claims 1 to 3. a stator;
a rotor of the rotary electric machine according to any one of claims 1 to 4 ;
A rotating electric machine.

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