JP2019022278A - Rotary electric machine manufacturing device, manufacturing method for rotary electric machine, and rotary electric machine - Google Patents

Abstract

To provide a rotary electric machine manufacturing device capable of manufacturing, at low cost, a rotary electric machine the property of which is set according to a required performance.SOLUTION: A rotary electric machine manufacturing device 100 is for a rotary electric machine including a stator having a coil and a stator core to which the coil is attached, and a rotor 20 having a rotor core 23 disposed so as to face the stator core and being provided rotatably about the axis and having a magnet 27 attached to the rotor core 23, the rotor core 23 being provided with a magnet attachment portion 25 which extends in the axial direction of the axis and to which the magnet 27 is attached. The manufacturing device sets the axial dimension of the magnet 27 according to a prescribed required performance, and attaches the magnets 27 to the magnet attachment portions 25 of the rotor cores 23 having the same shape.SELECTED DRAWING: Figure 6

Description

  The present invention relates to a rotating electrical machine manufacturing apparatus, a rotating electrical machine manufacturing method, and a rotating electrical machine.

  In a rotating electrical machine such as a motor mounted on a vehicle, performance such as torque and output may be set in relation to the grade of the vehicle on which the vehicle is mounted and the vehicle type. The torque and output of the rotating electrical machine can be set as appropriate by changing, for example, the axial and radial dimensions of the rotor and stator. However, when the dimensions of the rotor and the stator are changed, it is necessary to provide a production line for each specification. Therefore, the production cost may increase with an increase in investment cost.

JP-A-8-251848

  By the way, the above-mentioned patent document 1 describes a rotor in which a magnetic space is formed at the center of a permanent magnet insertion hole of a rotor core. Thus, by forming a magnetic space in the permanent magnet insertion hole, there is a possibility that the motor characteristics can be changed compared to the case where the magnets are uniformly arranged over the entire length of the permanent magnet insertion hole. is there. However, in the technique described in Patent Document 1, a magnetic space is formed in order to extend the constant output range to a higher speed rotation region, and the motor characteristics are appropriately set according to the performance required for the rotating electrical machine. Is not described. Therefore, in the prior art, there is a problem that a rotating electrical machine having characteristics set according to required performance is manufactured at low cost.

  Accordingly, the present invention provides a rotating electrical machine manufacturing apparatus, a rotating electrical machine manufacturing method, and a rotating electrical machine that can manufacture a rotating electrical machine having characteristics set according to required performance at low cost.

  A rotating electrical machine manufacturing apparatus (for example, manufacturing apparatus 100 in the embodiment) of the present invention includes a coil (for example, the coil 15 in the embodiment) and a stator core (for example, the stator core 11 in the embodiment) to which the coil is mounted. A stator (for example, the stator 10 in the embodiment), a rotor core (for example, the rotor core 23 in the embodiment) that is disposed to face the stator core and is rotatable around a predetermined axis (for example, the axis O in the embodiment), and A magnet mounting portion (for example, the embodiment) having a magnet (for example, the magnets 27 and 127 in the embodiment) mounted on the rotor core and extending in the axial direction of the predetermined axis is mounted on the rotor core. The magnet mounting portions 25 and 125 in the rotor (for example, in the embodiment) A rotating electric machine (for example, the rotating electric machine 1 in the embodiment) comprising a rotor 20), and the dimension of the magnet in the axial direction is set according to a predetermined required performance, and the same shape The magnet is mounted on the magnet mounting portion of the rotor core.

  According to the present invention, since the characteristics of the rotating electrical machine are changed by changing the axial dimension of the magnet even if the rotor core is the same, the rotor core having the same shape is used and a plurality of characteristics corresponding to the required performance are used. Specified rotating electrical machines can be manufactured. For this reason, it becomes possible to manufacture the rotary electric machine of the some specification from which a characteristic differs with the same installation. Therefore, it is possible to suppress the generation of investment costs necessary for constructing a plurality of production lines according to each specification, and it is possible to manufacture a rotating electrical machine having characteristics set according to required performance at a low cost.

  In the rotating electrical machine manufacturing apparatus, it is desirable that the predetermined required performance is a required torque and a required output of the rotating electrical machine.

Conventionally, when manufacturing rotating electrical machines with multiple specifications with different torques and outputs, it is necessary to change the dimensions of the stator and rotor according to each specification, and as a result, the construction of multiple manufacturing lines corresponding to each specification Is required.
In the present invention, it is possible to manufacture rotating electrical machines having a plurality of specifications with different torques and outputs using the same rotor core, so that it is not necessary to construct a plurality of manufacturing lines corresponding to each specification. Therefore, a rotating electrical machine having a plurality of specifications with different torques and outputs can be manufactured at low cost.

  In the rotating electrical machine manufacturing apparatus, the predetermined required performance is preferably set in relation to a grade of a vehicle on which the rotating electrical machine is mounted.

  According to the present invention, since the torque and output can be reduced by using the same rotor core and reducing the size of the magnet, the manufacturing cost of the rotating electrical machine can be reduced by the amount of use of the magnet. Can do. That is, a rotating electrical machine mounted on an inexpensive grade vehicle can be manufactured at a lower cost than a rotating electrical machine mounted on an expensive grade vehicle. Therefore, it is suitable for manufacturing a rotating electrical machine mounted on a vehicle having a plurality of grades provided with price differences.

  In the rotating electrical machine manufacturing apparatus, the dimension of the magnet in the axial direction is set smaller than the dimension of the rotor core in the axial direction, and the magnet mounting portion in the axial direction is set according to the predetermined required performance. It is desirable to set the mounting position of the magnet.

  According to the present invention, for example, by attaching a magnet to the intermediate portion in the axial direction of the magnet mounting portion, the distribution of forces acting between the stator and the rotor can be made symmetrical in the axial direction. Therefore, it is possible to suppress axial vibration during rotation of the rotor.

  In the above rotating electrical machine manufacturing apparatus, it is desirable that the cross-sectional shape of the rotor core perpendicular to the predetermined axis is different at two different locations in the axial direction.

  According to the present invention, the characteristics of the rotating electrical machine determined according to the cross-sectional shape of the rotor core can be made different at two different locations in the axial direction. For this reason, for example, the cross-sectional shape of the region where the magnet is mounted in the rotor core as viewed from the radial direction is designed so that the magnet torque per unit length in the axial direction is larger, and the cross-sectional shape of the region where the magnet is not mounted Can be designed such that the reluctance torque per unit length in the axial direction is greater. As a result, the rotating electrical machine characteristics can be adjusted such that the torque is improved as compared with the case where the rotor core extends uniformly in the axial direction.

  The manufacturing method of the rotating electrical machine of the present invention includes a stator (for example, the stator 10 in the embodiment) having a coil (for example, the coil 15 in the embodiment) and a stator core (for example, the stator core 11 in the embodiment) to which the coil is mounted. A rotor core (for example, the rotor core 23 in the embodiment) that is disposed to face the stator core and is rotatable around a predetermined axis (for example, the axis O in the embodiment), and a magnet (for example, implementation) that is mounted on the rotor core. The rotor core is provided with a magnet mounting portion (for example, the magnet mounting portions 25 and 125 in the embodiment) that extends in the axial direction of the predetermined axis and is mounted with the magnet. A rotor (for example, the rotor 20 in the embodiment), and a rotating electrical machine (example) For example, in the method of manufacturing the rotating electrical machine 1) according to the embodiment, the size of the magnet in the axial direction is set according to predetermined required performance, and the magnet is attached to the magnet mounting portion of the rotor core having the same shape. It is characterized by being mounted.

  According to the present invention, since the characteristics of the rotating electrical machine change by changing the axial dimension of the magnet even if the rotor core is the same, a plurality of specifications having characteristics corresponding to the required performance using the rotor core of the same shape. Can be manufactured. For this reason, it becomes possible to manufacture the rotary electric machine of the some specification from which a characteristic differs with the same installation. Therefore, it is possible to suppress the generation of investment costs necessary for constructing a plurality of production lines according to each specification, and it is possible to manufacture a rotating electrical machine having characteristics set according to required performance at a low cost.

  A rotating electrical machine of the present invention (for example, the rotating electrical machine 1 in the embodiment) includes a stator (for example, the stator core 11 in the embodiment) including a coil (for example, the coil 15 in the embodiment) and a stator core (for example, the stator core 11 in the embodiment). , The stator 10 in the embodiment), the rotor core (for example, the rotor core 23 in the embodiment) that is disposed to face the stator core and is rotatable around a predetermined axis (for example, the axis O in the embodiment), and the rotor core A magnet mounting portion (for example, the magnet mounting in the embodiment) that extends in the axial direction of the predetermined axis and is mounted on the rotor core. Rotors (for example, the rotor 2 in the embodiment) provided with the portions 25 and 125) ), The magnet is dimensioned in the axial direction according to predetermined required performance, and the rotor is provided with a region where the magnet is mounted (for example, a magnet mounting region 21A in the embodiment). A region where the magnet is not mounted (for example, a magnet non-mounting region 21B in the embodiment) is provided side by side in the axial direction.

  According to the present invention, the axial dimension is set according to the predetermined required performance so that the area where the magnet is mounted and the area where the magnet is not mounted are provided side by side in the axial direction. Is mounted on the magnet mounting portion, and a rotating electrical machine having any one of a plurality of specifications having characteristics corresponding to the required performance can be obtained. A plurality of specifications of the rotating electrical machine can be manufactured with the same equipment by using a rotor core having the same shape and mounting a magnet whose axial dimension is set according to predetermined required performance on the magnet mounting portion. It becomes possible. Accordingly, it is possible to suppress the generation of investment costs necessary for constructing a plurality of production lines according to each specification, and it is possible to provide a rotating electrical machine having characteristics set according to required performance at a low cost.

  ADVANTAGE OF THE INVENTION According to this invention, the rotary electric machine by which the characteristic was set according to the required performance can be manufactured at low cost.

It is sectional drawing which shows the 1st specific example of the rotary electric machine obtained by the manufacturing apparatus and manufacturing method of embodiment. It is sectional drawing of the stator and rotor in the II-II line of FIG. It is sectional drawing of the stator and rotor in the III-III line of FIG. It is sectional drawing which shows the 2nd specific example of the rotary electric machine obtained by the manufacturing apparatus and manufacturing method of embodiment. It is sectional drawing which shows the 3rd specific example of the rotary electric machine obtained by the manufacturing apparatus and manufacturing method of embodiment. It is a schematic diagram which shows the structure of the manufacturing apparatus of the rotary electric machine of embodiment. It is a figure which shows the torque characteristic of the rotary electric machine obtained by the manufacturing apparatus and manufacturing method of embodiment. It is a figure which shows the output characteristic of the rotary electric machine obtained by the manufacturing apparatus and manufacturing method of embodiment. It is a figure which shows the drag loss of the rotary electric machine obtained by the manufacturing apparatus and manufacturing method of embodiment. It is sectional drawing which shows the 4th specific example of the rotary electric machine obtained by the manufacturing apparatus and manufacturing method of embodiment. It is a figure which shows the torque characteristic of the rotary electric machine obtained by the manufacturing apparatus and manufacturing method of embodiment. It is sectional drawing which shows the 5th specific example of the rotary electric machine obtained by the manufacturing apparatus and manufacturing method of embodiment.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the following description, the same reference numerals are given to configurations having the same or similar functions. And the description which overlaps those structures may be abbreviate | omitted.

<Embodiment>
(First specific example of rotating electrical machine)
First, a first specific example of the rotating electrical machine obtained by the rotating electrical machine manufacturing apparatus 100 and the manufacturing method of the embodiment will be described.
FIG. 1 is a cross-sectional view illustrating a first specific example of a rotating electrical machine obtained by the manufacturing apparatus and the manufacturing method of the embodiment. 2 is a cross-sectional view of the stator and the rotor taken along line II-II in FIG. 1 shows only one slit 25a and one magnet 27 described later (the same applies to FIGS. 5, 6, and 11).
As shown in FIGS. 1 and 2, the rotating electrical machine 1 of the first specific example of the embodiment includes a stator 10, a rotor 20, and a shaft 30. The rotating electrical machine 1 is a traveling motor mounted on a vehicle such as a hybrid vehicle or an electric vehicle. Note that the stator 10, the rotor 20, and the shaft 30 are arranged with the axis O (predetermined axis) as a common axis. Hereinafter, the direction in which the axis O extends will be referred to as the axial direction, the direction orthogonal to the axis O will be referred to as the radial direction, and the direction around the axis O will be referred to as the circumferential direction.

  The stator 10 includes a stator core 11 and a multi-layer (for example, U phase, V phase, W phase) coil 15 mounted on the stator core 11. The stator 10 generates a magnetic field when a current flows through the coil 15. The stator core 11 is formed in a cylindrical shape extending in the axial direction. The stator core 11 is formed, for example, by laminating a plurality of electromagnetic steel plates in the axial direction. The stator core 11 may be formed by press-molding soft magnetic powder. The stator core 11 is provided with slots 13 into which coils 15 are inserted side by side in the circumferential direction. The coil 15 is a segment coil configured such that a plurality of conductor segments formed by, for example, rectangular wires are inserted into the slots 13 of the stator core 11 and are connected to each other at portions protruding from the stator core 11 in the axial direction.

  The rotor 20 is an embedded magnet type rotor. The rotor 20 is disposed on the radially inner side of the stator 10. The rotor 20 includes a rotor core 23 and a magnet 27 attached to the rotor core 23. The rotor core 23 is formed in a cylindrical shape that extends uniformly in the axial direction, and is disposed opposite to the inner peripheral surface of the stator core 11. The rotor core 23 is formed, for example, by laminating a plurality of electromagnetic steel plates in the axial direction. The rotor core 23 may be formed by press-molding soft magnetic powder. A shaft 30 is inserted inside the rotor core 23 and fixed by press-fitting or the like. Thereby, the rotor core 23 is provided integrally with the shaft 30 so as to be rotatable around the axis O.

  In the rotor core 23, a magnet mounting portion 25 to which a magnet 27 is mounted is formed in each circumferential angle region of 1/12 round. The magnet mounting portion 25 is formed on the outer peripheral portion of the rotor core 23. The magnet mounting portion 25 is formed so as to penetrate the rotor core 23 in the axial direction. The magnet mounting portion 25 includes a plurality of (three in the illustrated example) slits 25a arranged at intervals in the radial direction. The plurality of slits 25a are formed in a concentric arc shape, and are provided so as to protrude radially inward. Both ends in the longitudinal direction viewed from the axial direction of each slit 25a are formed so as to be close to the outer peripheral surface of the rotor core 23, respectively.

  The magnet 27 is a rare earth magnet. Examples of rare earth magnets include neodymium magnets, samarium cobalt magnets, and praseodymium magnets. The magnet 27 is inserted (attached) into each slit 25a of the magnet attachment portion 25, and is fixed to the rotor core 23 with, for example, a resin or an adhesive. Each magnet 27 is formed to correspond to the shape of the slit 25a. That is, each magnet 27 is formed in an arc shape whose cross-sectional shape seen from the axial direction is convex toward the inside in the radial direction. The dimensions of each magnet 27 in the axial direction are the same. The length of each magnet 27 viewed from the axial direction is shorter than the length of the slit 25a into which each magnet 27 is inserted as viewed from the axial direction. Each magnet 27 is disposed at the center in the longitudinal direction of the slit 25a as viewed from the axial direction. Thereby, the flux barrier which is a space | gap is formed in the longitudinal direction both ends of each slit 25a seen from the axial direction. The flux barrier suppresses magnetic flux leakage of the magnet 27 to the rotor core 23.

FIG. 3 is a cross-sectional view of the stator and the rotor taken along line III-III in FIG.
As shown in FIGS. 1 to 3, the dimension of the magnet 27 in the axial direction is smaller than the dimension of the rotor core 23 in the axial direction. The dimensions in the axial direction of the plurality of magnets 27 are substantially the same. Each magnet 27 is arranged in a state of being close to one end of the magnet mounting portion 25 in the axial direction. Thereby, the rotor 20 is in a state in which two types of regions, a magnet mounting region 21A where the magnet 27 is mounted and a magnet non-mounting region 21B where the magnet 27 is not mounted, are provided side by side in the axial direction. . The magnet mounting area 21 </ b> A is provided at one end of the rotor 20. The magnet non-mounting area 21 </ b> B is provided at the other end of the rotor 20. In the magnet non-mounting area 21 </ b> B, a gap is provided in the magnet mounting portion 25. In the rotating electrical machine 1 of the illustrated first specific example, the magnet mounting area 21A is smaller than the magnet non-mounting area 21B in the axial direction.

(Second specific example of rotating electrical machine)
Next, a second specific example of the rotating electrical machine obtained by the rotating electrical machine manufacturing apparatus 100 and the manufacturing method of the embodiment will be described.
FIG. 4 is a cross-sectional view illustrating a second specific example of the rotating electrical machine obtained by the manufacturing apparatus and the manufacturing method of the embodiment.
As shown in FIG. 4, in the rotating electrical machine 1 of the second specific example of the embodiment, the magnet mounting area 21A is larger than the magnet non-mounting area 21B in the axial direction. That is, in the rotary electric machine 1 of the second specific example, the dimension of the magnet 27 in the axial direction is set larger than that of the rotary electric machine 1 of the first specific example shown in FIG.

(Third specific example of rotating electrical machine)
Next, a third specific example of the rotating electrical machine obtained by the manufacturing apparatus and the manufacturing method of the rotating electrical machine according to the embodiment will be described.
FIG. 5 is a cross-sectional view illustrating a third specific example of the rotating electrical machine obtained by the manufacturing apparatus and the manufacturing method of the embodiment.
As shown in FIG. 5, in the rotating electrical machine 1 of the third specific example of the embodiment, the entire rotor 20 is a magnet mounting region 21A in the axial direction. That is, in the rotary electric machine 1 of the third specific example, the dimension of the magnet 27 in the axial direction is larger than that of the rotary electric machine 1 of the first specific example shown in FIG. 1 and the rotary electric machine 1 of the second specific example shown in FIG. It is set large.

(Rotating electrical machine manufacturing apparatus and manufacturing method)
Next, the above-described rotating electrical machine manufacturing apparatus 100 and manufacturing method will be described.
FIG. 6 is a schematic diagram illustrating the configuration of the rotating electrical machine manufacturing apparatus according to the embodiment.
As illustrated in FIG. 6, the rotating electrical machine manufacturing apparatus 100 includes a transport unit 101, a magnet mounting unit 103, and a control unit 105. The rotating electrical machine manufacturing apparatus 100 constitutes a part of a rotating electrical machine manufacturing line, and is a device that manufactures the rotor 20 of the rotating electrical machines 1 of the specific examples described above, for example.

The transport unit 101 is constituted by, for example, a transport belt, a transport roller, or the like. The transport unit 101 sequentially transports the rotor core 23.
The magnet mounting means 103 is, for example, a robot arm or the like, acquires the magnet 27 to be mounted on the magnet mounting portion 25 of the rotor core 23, and mounts the acquired magnet 27 on the magnet mounting portion 25 of the rotor core 23.

  The control unit 105 controls the transport unit 101 and the magnet mounting unit 103. The control unit 105 sets the dimension of the magnet 27 in the axial direction according to predetermined required performance, and controls the magnet mounting means 103 so as to acquire the magnet 27 corresponding to the set dimension. The predetermined required performance is, for example, the required torque and required output of the rotating electrical machine 1 to be manufactured, and is set in relation to the grade of the vehicle on which the rotating electrical machine 1 is mounted. The vehicle grade is a rank classification set in a plurality of stages in the same vehicle type, and a difference in power performance or the like is provided. The control unit 105 controls the magnet mounting unit 103 so that the magnet 27 is mounted on the magnet mounting unit 25 of the rotor core 23 transported by the transport unit 101. The control unit 105 controls the magnet mounting means 103 so that the magnet 27 is mounted on one end of the magnet mounting unit 25 in the axial direction. The control unit 105 controls the transport unit 101 so as to change the transport destination of the rotor 20 according to the size of the magnet 27 mounted on the magnet mounting unit 25. As described above, the rotating electrical machine manufacturing apparatus 100 and the manufacturing method according to the present embodiment sets the size of the magnet 27 in the axial direction in accordance with predetermined required performance, and mounts the magnet 27 to the magnet mounting portion 25 of the rotor core 23. To do.

(Characteristics of rotating electrical machines)
Next, regarding the rotating electrical machine 1 obtained by the manufacturing apparatus 100 and the manufacturing method of the embodiment, the rotating electrical machine characteristics when the dimension of the magnet 27 in the axial direction is changed will be described.
FIG. 7 is a diagram illustrating torque characteristics of the rotating electrical machine obtained by the manufacturing apparatus and the manufacturing method of the embodiment. FIG. 8 is a diagram illustrating output characteristics of the rotating electrical machine obtained by the manufacturing apparatus and the manufacturing method of the embodiment. FIG. 9 is a diagram illustrating drag loss of the rotating electrical machine obtained by the manufacturing apparatus and the manufacturing method of the embodiment. In FIG. 7, the vertical axis indicates the torque of the rotating electrical machine, and the horizontal axis indicates the rotational speed of the rotating electrical machine. In FIG. 8, the vertical axis indicates the output of the rotating electrical machine, and the horizontal axis indicates the rotational speed of the rotating electrical machine. In FIG. 9, the vertical axis indicates drag loss, and the horizontal axis indicates the axial dimension of the magnet. 7 to 9 show measurement results when the axial dimension of the rotor core 23 is 61.5 mm and the axial dimension of the magnet 27 is changed from 20 mm to 61.5 mm. Further, the same stator 10 is used.

  As shown in FIGS. 7 and 8, the torque and output of the rotating electrical machine 1 both decrease as the axial dimension of the magnet 27 decreases. Further, as shown in FIG. 9, the drag loss of the rotating electrical machine 1 increases as the axial dimension of the magnet 27 increases. From these results, when the required torque and the required output of the rotating electrical machine 1 are small, the axial dimension of the magnet 27 is set small, and when the required torque and the required output of the rotating electrical machine 1 are large, the magnet 27 It can be seen that a predetermined required performance can be satisfied by setting a large dimension in the axial direction. Moreover, as shown in FIG. 9, it can be seen that the drag loss of the rotating electrical machine 1 can be reduced by setting the axial dimension of the magnet 27 smaller.

  As described above, in the rotating electrical machine manufacturing apparatus 100 and the manufacturing method according to the present embodiment, the dimension in the axial direction of the magnet 27 is set according to the predetermined required performance, and the magnet is mounted on the magnet mounting portion 25 of the rotor core 23 having the same shape. 27 is attached. According to the present embodiment, the characteristics of the rotating electrical machine 1 change by changing the axial dimension of the magnet 27 even if the rotor core 23 is the same, so that the rotor core 23 having the same shape is used to meet the required performance. The rotating electrical machine 1 having a plurality of specifications having characteristics can be manufactured. For this reason, it becomes possible to manufacture the rotary electric machine 1 of the some specification from which a characteristic differs with the same installation. Therefore, it is possible to suppress the generation of the investment cost necessary for constructing a plurality of production lines according to each specification, and the rotating electrical machine 1 having characteristics set according to the required performance can be manufactured at low cost.

  In particular, when the stator coil is a segment coil, if the stator core dimension changes as the rotor core dimension changes, the force required to insert the coil into the stator core slot may change or the coil angle tolerance may change. May cause axial displacement. Thereby, not only the equipment for manufacturing the rotor but also the equipment for manufacturing the stator may be required depending on the specifications of the rotating electrical machine. For this reason, since the manufacturing apparatus 100 and the manufacturing apparatus of this embodiment can manufacture the rotary electric machine 1 of a some specification using the rotor core 23 of the same shape, it is suitable for manufacture of the rotary electric machine which has a segment coil. .

  The predetermined required performance is a required torque and a required output of the rotating electrical machine 1. Conventionally, when manufacturing rotating electrical machines with multiple specifications with different torques and outputs, it is necessary to change the dimensions of the stator and rotor according to each specification, and as a result, the construction of multiple manufacturing lines corresponding to each specification Is required. On the other hand, in the manufacturing apparatus 100 and the manufacturing method of the present embodiment, it is possible to manufacture the rotating electrical machines 1 having a plurality of specifications with different torques and outputs using the same rotor core 23. Construction of a production line becomes unnecessary. Therefore, the rotary electric machine 1 having a plurality of specifications with different torques and outputs can be manufactured at low cost.

  The predetermined required performance is set in relation to the grade of the vehicle on which the rotating electrical machine 1 is mounted. In general, the required performance for a vehicle is lower for an inexpensive grade vehicle than for an expensive grade vehicle. According to the present embodiment, since the torque and output can be reduced by using the same rotor core 23 and reducing the size of the magnet 27, the amount of use of the magnet 27 is reduced, so that the rotating electrical machine 1 is manufactured. Cost can be reduced. That is, the rotating electrical machine 1 mounted on an inexpensive grade vehicle can be manufactured at a lower cost than the rotating electrical machine 1 mounted on an expensive grade vehicle. Therefore, it is suitable for manufacturing the rotating electrical machine 1 mounted on a vehicle having a plurality of grades provided with price differences.

  In the manufacturing apparatus 100 and the manufacturing method of the above embodiment, the magnet 27 is mounted on one end of the magnet mounting portion 25 in the axial direction. That is, in the rotating electrical machine 1 obtained by the manufacturing apparatus 100 and the manufacturing method of the above embodiment, the magnet mounting region 21A is provided at one end of the rotor 20, and the magnet non-mounting region 21B is provided at the other end of the rotor 20. However, it is not limited to this. In the rotating electrical machine manufacturing apparatus 100 and the manufacturing method, the dimension of the magnet 27 in the axial direction is set to be smaller than the dimension of the rotor core 23 in the axial direction, and the mounting position of the magnet 27 on the magnet mounting portion 25 in the axial direction is predetermined. It may be set according to the required performance.

FIG. 10 is a cross-sectional view illustrating a fourth specific example of the rotating electrical machine obtained by the manufacturing apparatus and the manufacturing method of the embodiment.
As shown in FIG. 10, in the rotating electrical machine 1 of the fourth specific example of the embodiment, the magnet mounting region 21 </ b> A is provided in the middle portion of the rotor 20, and the magnet non-mounting region 21 </ b> B is provided in both end portions of the rotor 20. Yes. That is, the dimension of the magnet 27 in the axial direction is smaller than the dimension of the rotor core 23 in the axial direction. Further, the magnet 27 is attached to the intermediate portion in the axial direction of the magnet attachment portion 25. In the illustrated example, the dimensions in the axial direction of each magnet non-mounting region 21B are substantially the same.

  As described above, the rotating electrical machine manufacturing apparatus 100 and the manufacturing method set the mounting position of the magnet 27 on the magnet mounting portion 25 in accordance with the predetermined required performance of the rotating electrical machine 1. For example, the rotating electrical machine of the fourth specific example By attaching the magnet 27 to the intermediate portion in the axial direction of the magnet mounting portion 25 as in 1, the distribution of forces acting between the stator 10 and the rotor 20 can be made symmetrical in the axial direction. Therefore, vibration in the axial direction when the rotor 20 rotates can be suppressed.

  Further, the rotor core 23 does not have to extend uniformly in the axial direction. For example, at least a part of the rotor core 23 in the non-magnet mounting region 21B may be shifted (skewed) in the circumferential direction with respect to the rotor core 23 in the magnet mounting region 21A.

  FIG. 11 is a diagram illustrating torque characteristics of the rotating electrical machine obtained by the manufacturing apparatus and the manufacturing method of the embodiment. In FIG. 11, the vertical axis represents the torque of the rotating electrical machine, and the horizontal axis represents the rotational speed of the rotating electrical machine. In addition, in FIG. 11, as the rotary electric machine 1 obtained by the manufacturing apparatus 100 and the manufacturing method of the embodiment, the axial dimension of the rotor core 23 is 61.5 mm, the axial dimension of the magnet mounting region 21A is 30 mm, A magnet non-mounting region 21B having an axial dimension of 31.5 mm is used. Further, data A shown in FIG. 11 is data of the rotating electrical machine 1 including the rotor core 23 in which the rotor core 23 extends uniformly in the axial direction. In addition, the data B shown in FIG. 11 is data of the rotating electrical machine 1 including the rotor 20 in which the entire rotor core 23 in the non-magnet mounting region 21B is arranged with an electrical angle shifted by 20 ° with respect to the rotor core 23 in the magnet mounting region 21A. It is.

  As shown in FIG. 11, the torque of the rotating electrical machine 1 increases the torque in the low rotation range by causing the rotor core 23 in the non-magnet mounting region 21B to skew with respect to the rotor core 23 in the magnet mounting region 21A, resulting in high rotation. The output is decreasing in the region. Thereby, when the required torque in the low rotation range of the rotating electrical machine 1 is large, the rotor core 23 in the magnet non-mounting area 21B is shifted in the circumferential direction with respect to the rotor core 23 in the magnet mounting area 21A, thereby being predetermined. It can be seen that the required performance can be satisfied.

Further, as the rotor core used in the manufacturing apparatus 100 and the manufacturing method of the embodiment, a rotor core having a different cross-sectional shape orthogonal to the axis O at two different positions in the axial direction may be used.
FIG. 12 is a cross-sectional view illustrating a fifth specific example of the rotating electrical machine obtained by the manufacturing apparatus and the manufacturing method of the embodiment.
As shown in FIG. 12, the rotor core 123 includes a first region (not shown in FIG. 12) in which the magnet mounting portion 25 (see FIG. 2) described above is formed in each of the circumferential angle regions of 1/12 rounds. The magnet mounting portion 125 is provided with a second region formed in each of the circumferential angle regions of 1/12 rounds arranged in the axial direction.

  In the second region of the rotor core 123, when the magnet 127 is mounted on the magnet mounting portion 125, the magnet torque per unit length in the axial direction becomes larger than when the magnet 27 is mounted on the magnet mounting portion 25 in the first region. It is formed as follows. Specifically, the magnet mounting portion 125 includes a plurality (a pair in the illustrated example) of slots 125a arranged at intervals in the circumferential direction. The plurality of slots 125a are each formed in a rectangular shape whose longitudinal direction is a direction intersecting the radial direction when viewed from the axial direction. In the illustrated example, the pair of slots 125a are V-shaped when viewed from the axial direction and are arranged to open radially outward.

  Each magnet 127 is mounted on the magnet mounting portion 125 in the second region. Each magnet 127 is formed to correspond to the shape of the slot 125a. That is, each magnet 127 is formed in a rectangular cross section when viewed from the axial direction. A flux barrier that is a gap is formed at both ends in the longitudinal direction as viewed from the axial direction of each slot 125a.

  Each magnet 127 is mounted on the magnet mounting portion 125 with the axial dimension set according to a predetermined required performance. The maximum dimension of the magnet 127 in the axial direction matches the dimension of the magnet mounting portion 125 in the axial direction (dimension in the axial direction of the second region). When a magnet is mounted on the entire magnet mounting portion 125 in the axial direction, the magnet mounting area 21A matches the second area, and the magnet non-mounting area 21B matches the first area. Further, when the magnet 127 is attached to a part of the magnet attachment portion 125 in the second region in the axial direction, the magnet attachment region 21A is provided in a part of the second region, and the magnet non-attachment region 21B is the first region. And the second region.

  According to this configuration, the characteristics of the rotating electrical machine 1 determined according to the cross-sectional shape of the rotor core can be made different at two different locations in the axial direction. For this reason, for example, the cross-sectional shape of the magnet mounting region 21A of the rotor 20 is designed so that the magnet torque per unit length in the axial direction is larger, and the cross-sectional shape of the magnet non-mounting region 21B of the rotor 20 is the unit in the axial direction. The reluctance torque per length can be designed to be larger. As a result, the rotating electrical machine characteristics can be adjusted such that the torque is improved as compared with the case where the rotor core extends uniformly in the axial direction.

The present invention is not limited to the above-described embodiment described with reference to the drawings, and various modifications can be considered within the technical scope thereof.
For example, in the above-described embodiment, a so-called IPM (Interior Permanent Magnet) motor provided with a magnet-embedded rotor as a rotating electric machine is taken as an example, but the present invention is not limited to this. The rotating electrical machine may be a so-called SPM (Surface Permanent Magnet) motor having a rotor with a magnet mounted on the outer peripheral surface of the rotor core.

Moreover, in the said embodiment, although the dimension of the axial direction of the magnet 27 inserted in each slit 25a of the magnet mounting part 25 is equivalent, it is not limited to this. For example, only the magnet 27 inserted into any one of the plurality of slits 25a of the magnet mounting portion 25 may be set in the axial dimension according to predetermined required performance.
Moreover, in the said embodiment, although the rotary electric machine 1 provided with the rotor 20 of 6 pole pairs was mentioned as a specific example, it does not specifically limit about the pole number of a rotor.

  Further, in the above embodiment, the predetermined required performance set for the rotating electrical machine is set in relation to the grade of the vehicle on which the vehicle is mounted, but is not limited to this, for example, on the vehicle type of the vehicle on which it is mounted. It may be set.

  In addition, it is possible to appropriately replace the components in the above-described embodiments with known components without departing from the spirit of the present invention.

  DESCRIPTION OF SYMBOLS 1 ... Rotating electric machine 10 ... Stator 11 ... Stator core 15 ... Coil 20 ... Rotor 23 ... Rotor core 25, 125 ... Magnet mounting part 27, 127 ... Magnet 100 ... Manufacturing apparatus of rotating electric machine O ... Axis (predetermined axis)

Claims (7)

A stator having a coil and a stator core on which the coil is mounted;
A rotor core disposed opposite to the stator core and rotatably provided around a predetermined axis; and a magnet attached to the rotor core, wherein the rotor core extends in an axial direction of the predetermined axis and is attached with the magnet. A rotor provided with a magnet mounting portion;
A rotating electrical machine manufacturing apparatus comprising:
Setting the dimension in the axial direction of the magnet according to a predetermined required performance, and mounting the magnet on the magnet mounting portion of the rotor core of the same shape;
An apparatus for manufacturing a rotating electrical machine. The predetermined required performance is a required torque and a required output of the rotating electrical machine.
The rotating electrical machine manufacturing apparatus according to claim 1. The predetermined required performance is set in relation to a grade of a vehicle on which the rotating electrical machine is mounted.
The rotating electrical machine manufacturing apparatus according to claim 1 or 2, The dimension in the axial direction of the magnet is set smaller than the dimension in the axial direction of the rotor core,
Setting the mounting position of the magnet on the magnet mounting portion in the axial direction according to the predetermined required performance;
The rotating electrical machine manufacturing apparatus according to any one of claims 1 to 3, wherein The cross-sectional shape orthogonal to the predetermined axis of the rotor core is different at two different locations in the axial direction.
The rotating electrical machine manufacturing apparatus according to any one of claims 1 to 4, wherein A stator having a coil and a stator core on which the coil is mounted;
A rotor core disposed opposite to the stator core and rotatably provided around a predetermined axis; and a magnet attached to the rotor core, wherein the rotor core extends in an axial direction of the predetermined axis and is attached with the magnet. A rotor provided with a magnet mounting portion;
A method of manufacturing a rotating electrical machine comprising:
Setting the dimension in the axial direction of the magnet according to a predetermined required performance, and mounting the magnet on the magnet mounting portion of the rotor core of the same shape;
The manufacturing method of the rotary electric machine characterized by the above-mentioned. A stator having a coil and a stator core on which the coil is mounted;
A rotor core disposed opposite to the stator core and rotatably provided around a predetermined axis; and a magnet attached to the rotor core; the rotor core extending in an axial direction of the predetermined axis and attached with the magnet. A rotor provided with a magnet mounting portion;
With
The axial dimension of the magnet is set according to predetermined required performance,
The rotor is provided with a region where the magnet is mounted and a region where the magnet is not mounted side by side in the axial direction.
Rotating electric machine characterized by that.

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