JP2019176579A - Rotor and rotary electric machine - Google Patents

Abstract

To easily adjust the mass imbalance in the circumferential direction of a rotor, and increase the production yield of the rotor.SOLUTION: A rotor 40 rotates about an axis O. The rotor 40 includes a core part 42 having a plurality of core materials 47 formed from magnetic bodies and layered in the axis O direction, and a tubular magnet part 43 in which the core part 42 is housed. A first core material 51, among the plurality of core materials 47, forming an end, in the axis O direction, of the core part 42 has a mass adjustment part 53 provided at a part in the circumferential direction about the axis O.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a rotor and a rotating electrical machine.

Conventionally, motors have been used as drive sources for various devices and products. For example, many motors are used in electrical systems such as automobiles. Even in the electrical system, a brushless motor can be used in a wide range. In an electrical system, high reliability may be desired particularly with respect to vibration and noise.
Conventionally, a technique for forming a rotor of a brushless motor by fixing a permanent magnet to the surface of a core member of the rotor is known. For example, a technique for bonding and fixing a permanent magnet piece and a core member with an adhesive, and a technique using a bonded magnet as a permanent magnet are known (see, for example, Patent Document 1).

International Publication No. 2012/132357

For example, in the rotor described in Patent Document 1, the mass deviation in the circumferential direction may increase due to, for example, the eccentricity of the core member. When such an unbalanced mass is large, a large vibration and noise are generated as the motor rotates.
When the permanent magnet is fixed on the surface of the core member as in the rotor described in Patent Document 1, it is difficult to cut the core member, and thus the unbalanced mass is reduced by cutting the core member. Is not easy. If the permanent magnet is shaved instead of shaving the core member, the performance of the motor deteriorates. In addition, since the permanent magnet may break in the process of cutting the permanent magnet, the manufacturing yield deteriorates. In addition, the method of adjusting the unbalanced mass with the putty requires a relatively large space and is not easy to apply to a small motor.

  The present invention has been made in view of such circumstances, and an object of the present invention is to provide a structure capable of easily adjusting the mass deviation in the circumferential direction of the rotor and increasing the manufacturing yield of the rotor. .

In order to solve the above problems, the present invention proposes the following means.
(1) A rotor according to an aspect of the present invention is a rotor that rotates about an axis, and includes a core part that includes a plurality of core members that are formed of a magnetic material and are stacked in the axial direction, and the core part includes A cylindrical magnet portion that is housed, and among the plurality of core materials, in a first core material that forms an end in the axial direction of the core portion, a part of the circumferential direction along the axis Is provided with a mass adjusting section.

The mass adjusting part is provided in a part of the circumferential direction of the first core material. Therefore, the circumferential mass balance of the rotor can be adjusted. Thereby, for example, it is possible to suppress the occurrence of vibration and noise when the rotor rotates.
A 1st core material forms the edge part of the axial direction in a core part. Therefore, in forming the core part, after the core material other than the first core material is laminated to form the precore, the first core material is laminated on the precore from the outside in the axial direction. The part can be formed. Therefore, when the rotor is manufactured, first, in a state where the pre-core and the magnet part are assembled, after confirming the mass balance in the circumferential direction of these assembled bodies, the first core can appropriately adjust the mass balance. A material can be laminated | stacked on a pre-core, and the mass balance as the whole rotor can be adjusted. Therefore, for example, it is easier to balance the mass while increasing the yield compared to the case where the mass balance is adjusted by cutting the magnet part or fixing the mass body to the magnet part and increasing or decreasing the mass of the magnet part. And can be adjusted accurately.
The mass adjusting unit is provided in the first core material. Therefore, it is not necessary to separately provide a member different from the core material (core part) in order to adjust the mass balance. Thereby, for example, the complexity of the structure and the increase in the number of parts can be suppressed while securing the magnetic force of the rotor.

(2) In the rotor according to the above (1), the mass adjusting unit may include a missing part in which a part of the first core material is missing.

  The mass adjusting unit includes a missing part. Therefore, it is possible to easily form the mass adjusting portion (defect portion).

(3) In the rotor which concerns on said (2), the said defect | deletion part may employ | adopt the structure provided with the through-hole located inside the outer periphery of the said 1st core material.

  The missing part has a through hole. The through hole is located inside the outer peripheral edge of the first core material and does not open from the outer peripheral edge of the first core material. Therefore, the outer peripheral edge of the first core material can be made continuous over the entire circumference in the circumferential direction, and the outer peripheral edge of the first core material can be made to continuously face the inner peripheral surface of the magnet portion over the entire circumference in the circumferential direction. Thereby, for example, a part of the outer peripheral edge of the first core material is missing and a part of the outer peripheral edge of the first core material is rotated as compared with a case where the outer peripheral edge does not face the inner peripheral surface of the magnet part. The child's magnetic force can be effectively secured.

(4) In the rotor according to (2) or (3), different magnetic poles are alternately arranged in the circumferential direction in the magnet portion, and the missing portion is adjacent to the circumferential direction in the magnet portion. You may employ | adopt the structure arrange | positioned in the equivalent position along the said circumferential direction and the intermediate part located between the magnetic poles which fit.

There are few lines of magnetic force generated in the intermediate part of the magnet part, and a part of the core part located inside the radial part of the intermediate part contributes little to securing the magnetic force of the rotor.
The missing portion is disposed at the same position along the circumferential direction as the intermediate portion of the magnet portion. Therefore, a defect | deletion part can be arrange | positioned in a part with little contribution about ensuring the magnetic force of a rotor as mentioned above. As a result, even if the core part (core material) is a rotor having a missing part, it is possible to easily ensure the magnetic force of the rotor.

(5) In the rotor which concerns on any one of said (1) to (4), the structure arrange | positioned at the outer peripheral part of the said 1st core material may be employ | adopted for the said mass adjustment part.

  The mass adjusting unit is disposed on the outer peripheral portion of the first core material. Thereby, compared with the case where the mass adjustment part is arrange | positioned at the inner peripheral part of a 1st core material, for example, the influence which the mass adjustment part has on the mass balance at the time of rotation is enlarged, and mass balance is easy to adjust. can do.

(6) A rotating electrical machine according to an aspect of the present invention includes the rotor according to any one of (1) to (5).

  According to the present invention, the mass deviation in the circumferential direction of the rotor can be easily adjusted, and the manufacturing yield of the rotor can be increased.

It is a longitudinal cross-sectional view which follows an axial direction in the rotary electric machine which concerns on one Embodiment of this invention. It is a perspective view of the rotor which comprises the rotary electric machine shown in FIG. It is the rear view which looked at the rotor shown in FIG. 2 from the 2nd side. It is a perspective view of the 1st core material which comprises the rotor shown in FIG. It is a perspective view of the 1st modification of the 1st core material shown in FIG. It is a perspective view of the 2nd modification of the 1st core material shown in FIG. It is a perspective view of the 3rd modification of the 1st core material shown in FIG. It is a perspective view of the 4th modification of the 1st core material shown in FIG. It is a perspective view of the 5th modification of the 1st core material shown in FIG. It is a perspective view of the 6th modification of the 1st core material shown in FIG.

  Hereinafter, a rotating electrical machine 10 (motor) according to an embodiment of the present invention will be described with reference to FIGS. 1 to 10. The rotating electrical machine 10 of the present embodiment is a so-called brushless motor. The rotating electrical machine 10 may be used for electrical equipment such as an automobile, and may be employed for other purposes.

(Basic configuration)
As shown in FIG. 1, the rotating electrical machine 10 includes a case 20, a stator 30, a rotor 40, and a hall element 70.
The central axes of the case 20, the stator 30 and the rotor 40 are arranged on a common axis. Hereinafter, this common axis is referred to as an axis O. A direction perpendicular to the axis O is referred to as a radial direction, and a direction around the axis O is referred to as a circumferential direction. The axis O is also the axis of the rotor 40, and the rotor 40 is rotatable around the axis O (circumferential direction).

The case 20 includes a housing 21 and an end bell 22. The housing 21 includes a cylindrical peripheral wall portion 23 that accommodates the stator 30, and an end surface portion 24 that closes a first end portion of both end portions of the peripheral wall portion 23 in the axis O direction. The end bell 22 is attached to a second end portion of both ends of the peripheral wall portion 23 in the direction of the axis O, and closes the second end portion.
Hereinafter, the first end side of the peripheral wall portion 23 along the axis O direction is referred to as a first side D1, and the second end side is referred to as a second side D2.

  The case 20 accommodates the stator 30 and the rotor 40. The case 20 accommodates the entire stator 30 therein. Although the case 20 accommodates most of the rotor 40 therein, a part of the rotor 40 (a rotating shaft 41 described later) protrudes from the case 20 to the outside through the housing 21 (end face portion 24). Yes.

The stator 30 is formed in a cylindrical shape. The outer peripheral surface of the stator 30 is fixed to the inner peripheral surface of the housing 21. The stator 30 is provided with an exciting coil (not shown). When the exciting coil is energized, a part of the stator 30 is magnetized and the rotor 40 rotates.
As shown in FIGS. 1 and 2, the rotor 40 includes a rotation shaft 41, a core part 42, and a magnet part 43. The axis O of the rotor 40 is the central axis of the rotating shaft 41.

  The rotating shaft 41 is supported by the case 20 via bearings 44a and 44b. Of the both ends of the rotating shaft 41 in the direction of the axis O, the second end located on the second side D2 is supported by the case 20 via a second bearing 44b provided on the end bell 22. On the other hand, of the both end portions, the first end portion located on the first side D <b> 1 protrudes from the housing 21 to the outside of the case 20. A portion of the rotary shaft 41 positioned between the both end portions is supported by the case 20 via a first bearing 44a provided on the housing 21 (end surface portion 24).

To the rotary shaft 41, annular bushes 45a and 45b are fixed. A pair of bushes 45a and 45b are provided at an interval in the direction of the axis O. The bushes 45a and 45b include a first bush 45a that contacts the first bearing 44a via the first washer 46a, and a second bush 45b that contacts the second bearing 44b via the second washer 46b. .
The rotary shaft 41 is supported by the case 20 so as to be rotatable around the axis O through these bearings 44a, 44b, bushes 45a, 45b and washers 46a, 46b.

  The core part 42 is formed in a cylindrical shape. The inner peripheral surface of the core part 42 is fixed to the outer peripheral surface of the rotating shaft 41. The inner peripheral surface of the core part 42 and the inner peripheral surface of the rotating shaft 41 are fixed by, for example, press-fitting the rotating shaft 41 into the core part 42. The core portion 42 is disposed between the pair of bushes 45 a and 45 b and is accommodated in the case 20.

  The core portion 42 includes a plurality of core materials 47. The plurality of core members 47 are stacked in the axis O direction. The core part 42 is formed of a laminated body composed of a plurality of core materials 47. Each core material 47 is formed in a plate shape from a magnetic material. In this embodiment, each core material 47 is formed of the same material (ferromagnetic material, specifically iron).

  The plurality of core members 47 have the same shape and the same size. In other words, in the state where the plurality of core members 47 are arranged coaxially, the outer peripheral edges 47a of the core members 47 coincide with each other. In the illustrated example, the core members 47 have the same annular shape in plan view, and the outer peripheral edges 47a of the core members 47 have the same perfect circle shape in plan view. The thicknesses of the plurality of core members 47 are equal to each other, for example, about 0.2 mm.

  The magnet part 43 is formed in a cylindrical shape. The magnet part 43 is formed of a permanent magnet. As shown in FIG. 3, in the magnet part 43, the different magnetic poles 48 are alternately arranged in the circumferential direction. In the illustrated example, the magnet portion 43 includes a magnetic pole 48 having four poles (N pole 48a and two S poles 48b each). In FIG. 3, a broken line indicates an intermediate portion 48 c located between the magnetic poles 48 adjacent in the circumferential direction in the magnet portion 43.

As shown in FIG. 1, the core portion 42 is accommodated in the magnet portion 43. The size of the magnet part 43 in the axis O direction is larger than the size of the core part 42 in the axis O direction. The core part 42 is disposed inside the magnet part 43 in the direction of the axis O.
The inner peripheral surface of the magnet part 43 is fixed to the outer peripheral surface of the core part 42. The inner peripheral surface of the magnet part 43 and the outer peripheral surface of the core part 42 are fixed, for example, by press-fitting the core part 42 into the magnet part 43.
The magnet part 43 can be formed by what is called a bond magnet etc., for example.

  The hall element 70 is fixed to the case 20 (end bell 22). The hall element 70 detects the rotation of the rotor 40. The hall element 70 faces the magnet portion 43 of the rotor 40 from the second side D2.

(Mass balance in the circumferential direction)
In the rotating electrical machine 10, for example, when a bonded magnet is employed for the magnet portion 43, the mass of the magnet portion 43 is likely to vary in the circumferential direction. That is, the bond magnet is, for example, a magnet obtained by mixing a ferrite magnet and a synthetic resin, and the mass of the bond magnet (magnet portion 43) is likely to vary in the circumferential direction due to variations in materials mixed during manufacture. Become.
Further, in the rotating electrical machine 10, in order to improve the torque output while reducing the diameter, it is conceivable that the rotating electrical machine 10 (the stator 30 and the rotor 40) is elongated in the direction of the axis O. However, in this case, the number of stacked core members 47 of the core portion 42 increases. As a result, when each core material 47 has a bias in the mass balance in the circumferential direction, even if the bias for each sheet is small, the bias is integrated and tends to be a large bias. Thereby, there exists a possibility that the mass balance of the circumferential direction in the rotor 40 may worsen.

(Mass adjustment part 53)
In the present embodiment, the plurality of core members 47 includes a first core member 51 and a second core member 52. The first core material 51 is provided with a mass adjustment unit 53, and the second core material 52 is not provided with this mass adjustment unit 53. The mass adjusting unit 53 adjusts the circumferential mass balance of the first core material 51. As a result, the mass adjusting unit 53 adjusts the circumferential mass balance of the entire rotor 40.

  The first core material 51 forms an end portion of the core portion 42 in the axis O direction. In the present embodiment, the first core material 51 forms an end portion of the second side D <b> 2 in the core portion 42. In other words, the first core material 51 is the one core material 47 that is positioned closest to the second side D <b> 2 among the stacked body of the core materials 47 that form the core portion 42. The second core material 52 forms a portion other than the end portion of the second side D2 in the core portion 42.

  Note that the first core material 51 may be a plurality of core materials 47 from the second side D2 including the one closest to the second side D2. Further, the first core material 51 may form both end portions in the core portion 42. Furthermore, the 1st core material 51 may form only the edge part of the 1st side D1 in the core part 42. FIG.

As shown in FIG. 4, the mass adjusting unit 53 is provided only in a part of the first core material 51 in the circumferential direction. That is, the mass adjusting unit 53 is not provided over the entire circumference of the first core material 51 in the circumferential direction.
The mass adjusting unit 53 is disposed on the outer peripheral portion 51 o of the first core material 51. The outer peripheral portion 51o of the first core material 51 refers to a portion located on the outer peripheral edge 47a side from the radial center located between the inner peripheral edge and the outer peripheral edge 47a in the first core material 51. The inner peripheral portion 51 i of the first core material 51 refers to a portion located closer to the inner peripheral edge than the center of the first core material 51.

  The mass adjusting unit 53 includes a defective portion 54 formed by partially deleting the first core material 51. The deficient portion 54 is a through hole 55 located inside the outer peripheral edge 47 a of the first core material 51. The through hole 55 is formed in a circular shape (a perfect circular shape in the illustrated example) in a plan view viewed from the direction of the axis O. The diameter of the through hole 55 is smaller than the inner diameter of the first core material 51.

  As shown in FIG. 3, the defect | deletion part 54 is arrange | positioned in the same position as the said intermediate part 48c of the magnet part 43 along the circumferential direction. In other words, the missing portion 54 is located on the inner side in the radial direction with respect to the intermediate portion 48 c of the magnet portion 43. The missing portion 54 may be shifted in the circumferential direction with respect to the intermediate portion 48c.

(Production method)
The rotor 40 in the rotating electrical machine 10 can be manufactured by the following manufacturing method. In addition, the manufacturing method shown below is an example, and a manufacturing method is not restricted to this method.
First, the 2nd core material 52 of the core part 42 is laminated | stacked, and a pre-core is formed. At this time, for example, the pre-core is formed by laminating the second core material 52 while being press-fitted into the rotating shaft 41.
Thereafter, the pre-core and the magnet part 43 are assembled. At this time, for example, the pre-core is press-fitted into the magnet portion 43 and the outer peripheral surface of the pre-core is fixed to the inner peripheral surface of the magnet portion 43. Thereby, the rotor 40 (hereinafter referred to as a prerotor) in a state where the first core material 51 is not stacked on the core portion 42 is formed.

Next, the mass balance in the circumferential direction of the prerotor is confirmed. As a method for confirming the mass balance, a known method can be appropriately employed.
Finally, after preparing the 1st core material 51 which can adjust mass balance appropriately, it laminates | stacks on a pre-core, and adjusts the mass balance as the rotor 40 whole.
Thereby, the rotor 40 in which the circumferential mass balance is adjusted is manufactured. When manufacturing the rotating electrical machine 10, for example, a method of assembling the rotor 40 manufactured by this manufacturing method, the case 20, and the stator 30 can be employed.

In addition, in the manufacturing method of the rotor 40, before confirming the mass balance, a plurality of types of first core materials 51 may be prepared in advance, and after confirming the mass balance, it is appropriate depending on the mass balance. The first core material 51 having the mass adjusting portion 53 may be formed.
Examples of the first core material 51 include first to sixth modifications shown in FIGS. 5 to 10.

  As shown in FIG. 5, the first core material 51 </ b> A of the first modified example is provided with a plurality of (three in the illustrated example) through holes 55 at intervals in the circumferential direction. The plurality of through holes 55 have the same shape and the same size. The plurality of through holes 55 are arranged at equivalent positions in the radial direction, and are arranged at equal intervals in the circumferential direction.

  As shown in FIG. 6, in the first core material 51B of the second modified example, a plurality of (three in the illustrated example) through holes 55 are provided at intervals in the circumferential direction, as in the first modified example. ing. The second modification is different from the first modification in that one of the plurality of through holes 55 has a larger diameter than the other through holes 55.

  As shown in FIG. 7, the first core material 51C of the third modified example is provided with only one through hole 55, and the through hole 55 has a long hole shape extending in the circumferential direction in plan view. Is formed.

  As shown in FIG. 8, the first core material 51 </ b> D of the fourth modified example is provided with a notch 56 instead of the through hole 55 as the mass adjusting unit 53. The notch 56 extends from the outer peripheral edge 47 a of the first core material 51 toward the inside in the radial direction. The notch 56 opens to the outer peripheral edge 47 a of the first core material 51. The notch 56 is formed in a straight line extending in the radial direction in plan view. In the illustrated example, only one notch 56 is provided.

  As shown in FIG. 9, the first core material 51 </ b> E of the fifth modification is provided with a notch 56 as in the fourth modification. The fifth modification is different from the fourth modification in that a plurality of notches 56 are provided in the circumferential direction. The plurality of notches 56 have the same shape and the same size.

  As shown in FIG. 10, the first core material 51 </ b> F of the sixth modified example is provided with a notch 56 similarly to the fourth modified example. The sixth modification is different from the fourth modification in that the notch 56 is formed in a fan shape with a central angle of 180 degrees or more. The notch 56 is formed from the outer peripheral portion 51o to the inner peripheral portion 51i of the first core material 51F. As a result, the planar view shape of the portion other than the defect portion 54 in the first core material 51 is a fan shape having a central angle of less than 180 degrees.

Note that in the first core materials 51 and 51A to 51F shown in FIGS. 4 to 10, the defect part 54 is provided as the mass adjustment part 53, but instead of the defect part 54 or together with the defect part 54, the mass adjustment part A mass body (weight) as 53 may be provided.
Further, in the first core materials 51 and 51A to 51E shown in FIGS. 4 to 9, the mass adjusting portion 53 may be disposed on the inner peripheral portion 51 i of the first core material 51.

(Function and effect)
As described above, according to the rotating electrical machine 10 and the rotor 40 according to the present embodiment, the mass adjusting unit 53 is provided in a part of the first core material 51 in the circumferential direction. Therefore, the circumferential mass balance of the rotor 40 can be adjusted. Thereby, for example, it is possible to suppress the occurrence of vibration and noise when the rotor 40 rotates.

  The first core material 51 forms an end of the core portion 42 in the axis O direction. Therefore, when forming the core portion 42, the core material 47 of the core portion 42 other than the first core material 51 is laminated to form a precore, and then the first core material 51 is applied to the precore from the outside in the axis O direction. By stacking, the core portion 42 can be formed. Therefore, when the rotor 40 is manufactured, first, in a state where the pre-core and the magnet portion 43 are assembled, after confirming the mass balance in the circumferential direction of these assembled bodies, the mass balance can be adjusted appropriately. 1 core material 51 can be laminated on a pre-core, and the mass balance as the whole rotor 40 can be adjusted. Therefore, for example, when the mass balance is adjusted by cutting the magnet portion 43 or fixing a mass body to the magnet portion 43 and adjusting the mass balance by increasing or decreasing the mass of the magnet portion 43, the mass is increased. The balance can be adjusted easily and accurately.

The mass adjusting unit 53 is provided in the first core material 51. Therefore, it is not necessary to separately provide a member different from the core material 47 (core portion 42) in order to adjust the mass balance. Thereby, for example, the complexity of the structure and the increase in the number of parts can be suppressed while securing the magnetic force of the rotor 40.
The mass adjusting unit 53 includes a defect portion 54. Therefore, the mass adjustment part 53 (defect part 54) can be formed easily.

  The through hole 55 is located inside the outer peripheral edge 47 a of the first core material 51 and does not open from the outer peripheral edge 47 a of the first core material 51. Therefore, as shown in FIG. 4 to FIG. 7, when the defect portion 54 is formed by the through hole 55, the outer peripheral edge 47 a of the first core material 51 is made continuous over the entire circumference. The outer peripheral edge 47 a can be continuously opposed to the inner peripheral surface of the magnet portion 43 over the entire circumference in the circumferential direction. Thereby, for example, when a part of the outer peripheral edge 47 a of the first core material 51 is missing and a part of the outer peripheral edge 47 a of the first core material 51 does not face the inner peripheral surface of the magnet part 43. As compared with the above, the magnetic force of the rotor 40 can be effectively secured.

There are few lines of magnetic force generated in the intermediate portion 48c of the magnet portion 43 as shown in FIG. 3, and the portion of the core portion 42 located inside the intermediate portion 48c in the radial direction secures the magnetic force of the rotor 40. The contribution is small.
The defect portion 54 is disposed at the same position along the circumferential direction as the intermediate portion 48 c of the magnet portion 43. Therefore, the defect | deletion part 54 can be arrange | positioned in the part with little contribution about ensuring the magnetic force of the rotor 40 as mentioned above. As a result, even if the core part 42 (core material 47) is the rotor 40 having the missing part 54, the magnetic force of the rotor 40 can be easily secured.

  The mass adjusting unit 53 is disposed on the outer peripheral portion 51 o of the first core material 51. Thereby, compared with the case where the mass adjustment part 53 is arrange | positioned at the inner peripheral part 51i of the 1st core material 51, for example, the influence which the mass adjustment part 53 has on the mass balance at the time of rotation is enlarged, and mass balance Can be easily adjusted.

  The technical scope of the present invention is not limited to the above embodiment, and various modifications can be made without departing from the spirit of the present invention. It is possible to replace the constituent elements in the embodiment with known constituent elements without departing from the spirit of the present invention, and the above-described modified examples may be appropriately combined.

DESCRIPTION OF SYMBOLS 10 Rotating electrical machine 40 Rotor 42 Core part 43 Magnet part 47 Core material 47a Outer peripheral edge 48 Magnetic pole 48c Intermediate | middle part 51, 51A, 51B, 51C, 51D, 51E, 51F 1st core material 51o Outer peripheral part 53 Mass adjustment part 54 Missing part 55 Through-hole O axis

Claims (6)

A rotor that rotates about an axis,
A core portion having a plurality of core materials formed of a magnetic material and stacked in the axial direction;
A cylindrical magnet portion in which the core portion is housed,
Of the plurality of core materials, in the first core material forming the end portion of the core portion in the axial direction, a rotor provided with a mass adjusting portion in a part of the circumferential direction along the axis. .   2. The rotor according to claim 1, wherein the mass adjusting unit includes a deficient portion in which a part of the first core material is deficient.   3. The rotor according to claim 2, wherein the defect portion includes a through hole located inside an outer peripheral edge of the first core material. In the magnet portion, different magnetic poles are alternately arranged in the circumferential direction,
4. The rotation according to claim 2, wherein the defect portion is arranged at an equivalent position along the circumferential direction with an intermediate portion located between the magnetic poles adjacent in the circumferential direction in the magnet portion. Child.   5. The rotor according to claim 1, wherein the mass adjusting unit is disposed on an outer peripheral portion of the first core material.   A rotating electrical machine comprising the rotor according to any one of claims 1 to 5.

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