WO2017187574A1

WO2017187574A1 - Rotating electric machine

Info

Publication number: WO2017187574A1
Application number: PCT/JP2016/063279
Authority: WO
Inventors: 俊介落合; 哲哉植田; 大輔川口
Original assignee: 三菱電機株式会社
Priority date: 2016-04-27
Filing date: 2016-04-27
Publication date: 2017-11-02
Also published as: JPWO2017187574A1; TWI613879B; TW201739148A; JP6081040B1

Abstract

A rotating electric machine is provided with: a stator 2 having an armature core 21 around which a coil 20 is wound; a rotor 3 provided rotatably with respect to the stator 2; and a power supply unit for supplying power to the stator 2. A plurality of stators 2 are arranged side by side in the axial line direction of a central axis AX. Among the plurality of stators 2, the stators 2 adjacent to each other along the axial line direction of the central axis AX have the coils 20 electrically connected with each other. The power supply unit is electrically connected to the coil 20 of the stator 2 arranged at an end in the axial line direction of the central axis AX and supplies power to the stator 2 arranged at the end, thereby enabling the plurality of stators 2 to be synchronously driven.

Description

Rotating motor

The present invention relates to a rotary motor having a stator and a rotor.

Among rotary motors that can be driven directly without using a reduction gear, for example, a direct drive motor is known. The direct drive motor has less backlash and backlash, is highly rigid, and can be controlled with high precision compared to a motor through a reduction gear. In recent years, for example, in the field of liquid crystal devices and semiconductor devices, downsizing and flattening of devices have been required. In order to reduce the size and flatten the device, it is required to reduce the size and flatten the direct drive motor.

For example, Patent Document 1 describes a configuration in which a plurality of motor units are stacked in the axial direction of the central axis.

Special table 2012-518376 gazette

In the configuration of Patent Document 1, by using a configuration in which a plurality of motor units are stacked, the parts can be shared and the torque required by the customer can be satisfied. However, since wires are drawn from the plurality of motor units to the power supply unit by the number of motor units, the number of wires increases. Therefore, there is a possibility that the copper loss of the wiring increases and the efficiency decreases. Moreover, since it is necessary to connect in each motor unit, a connection space increases.

The present invention has been made in view of the above, and an object of the present invention is to obtain a rotary electric motor that can be reduced in size and flattened while suppressing a decrease in efficiency and can reduce a connection space.

In order to solve the above-described problems and achieve the object, the present invention provides a stator having an armature core wound with a coil, a rotor provided rotatably with respect to the stator, and supplying power to the stator. A plurality of stators arranged side by side in the axial direction of the central axis of the rotor, and coils of adjacent stators are electrically connected to each other along the axial direction of the central axis among the plurality of stators. The power supply unit is electrically connected to the coils of the stator and can drive the plurality of stators by supplying power to the stator.

According to the present invention, it is possible to achieve a reduction in size and flattening while suppressing a decrease in efficiency, and it is possible to reduce a connection space.

Sectional drawing which shows the rotary electric motor which concerns on Embodiment 1. FIG. The perspective view which shows the structure of the armature core which concerns on Embodiment 1. FIG. The figure which shows arrangement | positioning of the armature core in the some stator which concerns on Embodiment 1 The figure which shows arrangement | positioning of the armature core in the some stator which concerns on Embodiment 1 The figure which shows the state of the connection of the rotary electric motor which concerns on Embodiment 1 typically Sectional drawing which shows the rotary electric motor which concerns on Embodiment 2. FIG. The figure which shows typically the state of the connection of the rotary electric motor which concerns on Embodiment 2. FIG. Sectional drawing which shows the rotary electric motor which concerns on Embodiment 3.

Hereinafter, a rotary electric motor according to an embodiment of the present invention will be described in detail with reference to the drawings. In addition, this invention is not limited by this embodiment, It is applicable also to a general rotary electric motor.

Embodiment 1 FIG.
FIG. 1 is a cross-sectional view showing a rotary electric motor 1 according to the first embodiment. In Embodiment 1, the rotary electric motor 1 is a direct drive motor. The rotary electric motor 1 has a plurality of motor units having a stator 2 and a rotor 3. In the first embodiment, the two

motor units

11 and 12 are provided in two stages along the axial direction D1 of the central axis AX of the rotary electric motor 1. Since the rotary electric motor 1 has the two-

stage motor units

11 and 12, the output torque obtained compared to the one-stage motor unit is doubled. The first-stage motor unit 11 and the second-stage motor unit 12 are fixed by bolts 36a. As described above, the

motor units

11 and 12 adjacent to each other along the axial direction D1 of the central axis AX are integrally connected. Therefore, the adjacent stators 2 along the axial direction D1 of the central axis AX are integrally connected.

The stator 2 has a plurality of armature cores 21 arranged in the direction D2 around the axis of the central axis AX. The stator 2 is formed in an annular shape by a plurality of armature cores 21. The outer peripheral surface of the stator 2 is fixed to the frame 36. The armature core 21 is wound with multiple wires to form a coil. Thus, the stator 2 has the armature core 21 around which the coil 20 is wound. The armature core 21 is formed by stacking a plurality of plate-shaped core members and fixed by punching. The armature core 21 is provided with an insulator 24 and a slot cell 27. One insulator 24 is arranged on each side of the armature core 21 in the axial direction D1 of the central axis AX of the rotary electric motor 1. The insulator 24 is an insulator and is formed using a synthetic resin. The slot cell 27 is disposed at a position that covers both sides of the coil 20 in the direction D2 around the axis of the central axis AX. The slot cell 27 is an insulator, and a composite film formed using PPS resin or PET resin is used.

The rotor 3 has a rotor sleeve 33 fixed to the shaft 6 and a plurality of permanent magnets 30 fixed to the rotor sleeve 33. The rotor sleeve 33 is formed in a cylindrical shape. The rotor sleeve 33 disposed in the motor unit 11 and the rotor sleeve 33 disposed in the motor unit 12 are fixed by bolts 33a. Therefore, the rotor 3 is integrally provided in the axial direction D1 of the central axis AX. The permanent magnet 30 is fixed to the outer peripheral surface of the rotor sleeve 33. In the rotor 3, the permanent magnet 30 is arranged to face the armature core 21. In FIG. 1, the stator 2 is disposed on the outer peripheral side of the rotor 3, but the stator 2 may be disposed on the inner peripheral side of the rotor 3. The rotary motor 1 rotates the rotor 3 by forming a magnetic pole in the air gap between the armature core 21 and the permanent magnet 30 and generating a repulsive attractive force.

The bearing 7 is fixed between the rotor 3 and the shaft 6. The bracket 4 is fixed to the frame 36 by bolts 4a. Wiring is drawn from the bracket 4, and the power connector 5 is attached in a state of covering the drawing portion of the wiring. Note that one wiring lead-out portion and one power connector 5 are provided for one rotary motor 1. A detector 8 is attached to the end of the shaft 6 on the side opposite to the load in the axial direction D1 of the central axis AX.

FIG. 2 is a perspective view showing the configuration of the armature core 21 according to the first embodiment. FIG. 2 shows one armature core 21. 3 and 4 are diagrams showing the arrangement of the armature cores 21 in the plurality of stators 2. FIG. 4 shows an enlarged part of FIG.

As shown in FIG. 2, the insulator 24 of the armature core 21 is provided with a pin 9 for electrically connecting the first-stage motor unit 11 and the second-stage motor unit 12. The pins 9 are provided so as to protrude from the armature core 21 on both sides in the axial direction D1 of the central axis AX. One end of the coil 20 is connected to one end of the two pins 9 and the other end of the coil 20 is connected to the other end. The armature core 21 of the motor unit 11 and the armature core 21 of the motor unit 12 are electrically connected by pins 9. The pin 9 has a dimension capable of connecting the motor unit 11 and the motor unit 12. The connection configuration between the coil 20 and the pin 9 is not particularly limited.

As shown in FIG. 3, in the motor unit 12 and the motor unit 11, a plurality of armature cores 21 are arranged side by side with an equal pitch P around the axis of the central axis AX. Thereby, the coils 20 provided in the plurality of armature cores 21 are arranged side by side at an equal pitch P around the axis of the central axis AX.

As shown in FIG. 4, in the motor unit 12, the phase of the armature core 21, that is, the phase of the coil 20 is different from the motor unit 11 in the axial direction D 2 of the central axis AX. In the first embodiment, in the motor unit 12, the coil 20 is arranged with respect to the motor unit 11 in a phase shifted by half the pitch P in the direction D2 around the axis of the central axis AX, that is, at a position shifted by P / 2. The half phase P / 2 of the pitch P varies depending on the number of armature cores 21. That is, if the number of armature cores 21 is N,
P / 2 = 180 ° / N
It becomes.

Between the motor unit 11 and the motor unit 12 adjacent to each other along the axial direction D1 of the central axis AX, the armature core 21 is shifted in the axial direction D2 of the central axis AX by a phase P / 2 that is half the pitch P. Thereby, interference with the coil end in the armature core 21 of the motor unit 11 and the coil end in the armature core 21 of the motor unit 12 can be suppressed. That is, one coil end of the motor unit 11 and the motor unit 12 enters a state between the other coil ends. For this reason, size reduction and flattening of the rotary electric motor 1 can be achieved.

FIG. 5 is a diagram schematically illustrating a connection state of the rotary electric motor 1 according to the first embodiment. In FIG. 5, the direction in which the armature cores 21 are arranged is a direction D2 around the axis of the central axis AX. FIG. 5 illustrates the connection state in the U phase. In the armature core 21A at the right end of FIG. 5 among the plurality of armature cores 21 of the motor unit 11, one end of the coil 20 is connected to the pin 9a. A lead wire A0 is connected to the pin 9a. The lead wire A0 is connected to the power supply unit 40. The power supply unit 40 supplies power to the armature core 21. The power supply unit 40 is connected to the controller 50. The controller 50 supplies a command signal to the power supply unit 40. The other end of the coil 20 is connected to the pin 9b. A lead wire A1 is connected to the pin 9b.

Among the plurality of armature cores 21 of the motor unit 12, in the armature core 21B at the right end in FIG. 5, one end of the coil 20 is connected to the pin 9c. A lead wire A1 is connected to the pin 9c. The armature core 21A of the motor unit 11 and the armature core 21B of the motor unit 12 are electrically connected via the lead wire A1. The other end of the coil 20 is connected to the pin 9d. The lead wire A2 is connected to the pin 9d.

In the armature core 21C adjacent to the armature core 21B among the plurality of armature cores 21 of the motor unit 12, one end of the coil 20 is connected to the pin 9e. A lead wire A2 is connected to the pin 9e. The armature core 21C is electrically connected to the armature core 21B through the lead wire A2. The armature core 21C is a U ′ phase in which the winding direction of the coil 20 is opposite to the direction of the coil 20 of the armature core 21B. The other end of the coil 20 is connected to the pin 9f. A lead wire A3 is connected to the pin 9f.

Among the armature cores 21 of the motor unit 11, in the armature core 21D adjacent to the armature core 21A, one end of the coil 20 is connected to the pin 9g. A lead wire A3 is connected to the pin 9g. The armature core 21D is electrically connected to the armature core 21C through the lead wire A3. The armature core 21D is a U ′ phase in which the winding direction of the coil 20 is opposite to that of the coil 20 of the armature core 21A. The other end of the coil 20 is connected to the pin 9h. A lead wire A4 is connected to the pin 9h. Thus, in the U phase, the lead wires A0 and A4 are collected from the motor unit 11 and pulled out. The V phase and the W phase are also connected in the same manner as the U phase. For this reason, the lead wires are not drawn out from the motor unit 12 but are collected from the motor unit 11 and drawn out. The power supply unit 40 can drive the plurality of stators 2 synchronously by supplying power to the lead wires including the lead wires A0 and A4 drawn from the motor unit 11.

According to the first embodiment, a plurality of stators 2 are arranged in the axial direction D1 of the central axis AX, and among the plurality of stators 2, the coils 20 of the stator 2 adjacent to each other along the axial direction D1 of the central axis AX. Are electrically connected, and the power supply unit 40 is electrically connected to the coil 20 of the stator 2 disposed at the end of the central axis AX in the axial direction D1, and supplies power to the stator 2 at the end. Since the plurality of stators 2 can be driven synchronously, lead wire lead-out portions are integrated into the motor unit 11. For this reason, a reduction in efficiency can be suppressed, and the connection space can be reduced. For this reason, the rotary electric motor 1 can be downsized. In addition, since only one power supply unit 40 is connected to the rotary motor 1, it is possible to reduce the facility input cost on the customer side.

Further, according to the first embodiment, the

motor units

11 and 12 having the stator 2 and the rotor 3 are arranged in two stages in the axial direction D1 of the central axis AX. Output torque can be obtained. Further, since the rotor 3 and the stator 2 are unitized and can be divided as the same part, the parts can be shared, and the number of parts can be reduced.

Embodiment 2. FIG.
FIG. 6 is a cross-sectional view showing a rotary electric motor 1A according to the second embodiment. In the second embodiment, rotary electric motor 1A is a direct drive motor. In the second embodiment, the same components as those in the rotary electric motor 1 according to the first embodiment are denoted by the same reference numerals, and description thereof is omitted or simplified.

As shown in FIG. 6, the rotary electric motor 1 A has a plurality of motor units having a stator 2 and a rotor 3. In the second embodiment, three

motor units

11, 12, and 13 are provided in three stages in the axial direction D1 of the central axis AX of the rotary electric motor 1A. By providing the three-

stage motor units

11, 12, and 13, the output torque obtained compared to the one-stage motor unit is tripled. A bolt 36a fixes between the first-stage motor unit 11 and the second-stage motor unit 12, and between the second-stage motor unit 12 and the third-stage motor unit 13. Thus, the

motor units

11, 12, and 13 adjacent to each other along the axial direction D1 of the central axis AX are integrally connected. Therefore, the adjacent stators 2 along the axial direction D1 of the central axis AX are integrally connected.

In the rotor 3, a rotor sleeve 33 disposed in the motor unit 11 and a rotor sleeve 33 disposed in the motor unit 12 are fixed by bolts 33a. The rotor sleeve 33 disposed in the motor unit 12 and the rotor sleeve 33 disposed in the motor unit 13 are fixed by bolts 33b. Therefore, the rotor 3 is integrally provided in the axial direction D1 of the central axis AX.

FIG. 7 is a diagram schematically illustrating a connection state of the rotary electric motor 1A according to the second embodiment. In FIG. 7, the direction in which the armature cores 21 are arranged is a direction D2 around the axis of the central axis AX. In FIG. 7, the connection state in the U phase will be described. In the armature core 21A at the right end of FIG. 7 among the plurality of armature cores 21 of the motor unit 11, one end of the coil 20 is connected to the pin 9a. A lead wire A0 is connected to the pin 9a. The lead wire A0 is connected to the power supply unit 40. The power supply unit 40 supplies power to the armature core 21. The power supply unit 40 is connected to the controller 50. The controller 50 supplies a command signal to the power supply unit 40. The other end of the coil 20 is connected to the pin 9b. A lead wire A1 is connected to the pin 9b.

Among the armature cores 21 of the motor unit 12, in the armature core 21B at the right end in FIG. 7, one end of the coil 20 is connected to the pin 9c. A lead wire A1 is connected to the pin 9c. The armature core 21A of the motor unit 11 and the armature core 21B of the motor unit 12 are electrically connected via the lead wire A1. The other end of the coil 20 is connected to the pin 9d. A lead wire A5 is connected to the pin 9d.

Among the armature cores 21 of the motor unit 13, in the armature core 21E at the right end in FIG. 7, one end of the coil 20 is connected to the pin 9i. A lead wire A5 is connected to the pin 9i. The armature core 21B of the motor unit 12 and the armature core 21E of the motor unit 13 are electrically connected via a lead wire A5. The other end of the coil 20 is connected to the pin 9j. Note that a lead wire A6 is connected to the pin 9j.

Among the plurality of armature cores 21 of the motor unit 13, in the armature core 21F adjacent to the armature core 21E, one end of the coil 20 is connected to the pin 9k. A lead wire A6 is connected to the pin 9k. The armature core 21F is electrically connected to the armature core 21E through the lead wire A6. The armature core 21F is a U ′ phase in which the winding direction of the coil 20 is opposite to that of the coil 20 of the armature core 21E. The other end of the coil 20 is connected to the pin 9l. A lead wire A7 is connected to the pin 9l.

In the armature core 21C adjacent to the armature core 21B among the plurality of armature cores 21 of the motor unit 12, one end of the coil 20 is connected to the pin 9e. A lead wire A7 is connected to the pin 9e. The armature core 21C is electrically connected to the armature core 21F via the lead wire A7. The armature core 21C is a U ′ phase in which the winding direction of the coil 20 is opposite to the direction of the coil 20 of the armature core 21B. The other end of the coil 20 is connected to the pin 9f. A lead wire A3 is connected to the pin 9f.

Among the armature cores 21 of the motor unit 11, in the armature core 21D adjacent to the armature core 21A, one end of the coil 20 is connected to the pin 9g. A lead wire A3 is connected to the pin 9g. The armature core 21D is electrically connected to the armature core 21C through the lead wire A3. The armature core 21D is a U ′ phase in which the winding direction of the coil 20 is opposite to that of the coil 20 of the armature core 21A. The other end of the coil 20 is connected to the pin 9h. A lead wire A4 is connected to the pin 9h. Thus, in the U phase, the lead wires A0 and A4 are collected from the motor unit 11 and pulled out. The V phase and the W phase are also connected in the same manner as the U phase. For this reason, the lead wires are not drawn out from the

motor units

12 and 13 but are collected from the motor unit 11 and drawn out.

7, in the

motor units

11, 12 and 13, a plurality of armature cores 21 are arranged side by side at an equal pitch P around the axis of the central axis AX. Thereby, the coils 20 provided in the plurality of armature cores 21 are arranged side by side at an equal pitch P around the axis of the central axis AX.

In the motor unit 12, the phase of the armature core 21, that is, the phase of the coil 20, is different from the motor unit 11 in the direction D2 around the axis of the central axis AX. In the second embodiment, in the motor unit 12, the coil 20 is arranged with respect to the motor unit 11 in a phase that is half the pitch P in the direction D2 around the axis of the central axis AX, that is, at a position shifted by P / 2.

In the motor unit 13, the phase of the armature core 21, that is, the phase of the coil 20 is different from the motor unit 12 in the direction D 2 around the axis of the central axis AX. In the second embodiment, in the motor unit 13, the coil 20 is arranged with respect to the motor unit 12 at a phase shifted by half the pitch P in the direction D2 around the axis of the central axis AX, that is, at a position shifted by P / 2. In the motor unit 13, the phase of the coil 20 in the direction D2 around the axis of the central axis AX is equal to that of the motor unit 11.

According to the second embodiment, the lead wire lead-out portion is integrated into the motor unit 11. For this reason, the number of lead wires drawn out to the power supply unit 40 can be reduced. Therefore, a connection space can be reduced and a reduction in efficiency can be suppressed. Thereby, size reduction of 1 A of rotary electric motors is attained. Moreover, since only one power supply unit 40 is connected to the rotary motor 1A, it can be manufactured at low cost. Further, since the

motor units

11, 12, and 13 having the stator 2 and the rotor 3 are arranged in three stages in the axial direction D1 of the central axis AX, an output torque that is three times that in the case where they are arranged in one stage is obtained. Is possible.

Embodiment 3 FIG.
FIG. 8 is a cross-sectional view showing a rotary electric motor 1B according to the third embodiment. In Embodiment 3, rotary electric motor 1B is a direct drive motor. In the third embodiment, the same components as those in the rotary electric motor 1 according to the first embodiment are denoted by the same reference numerals, and description thereof is omitted or simplified.

As shown in FIG. 8, the rotary electric motor 1 B has a plurality of motor units each having a stator 2 and a rotor 3. In Embodiment 3, four or more motor units 10 are provided in a plurality of stages in the axial direction D1 of the central axis AX of the rotary electric motor 1B. By providing the multi-stage motor unit 10, the output torque obtained as compared with the single-stage motor unit is multiple times. The adjacent motor units 10 are fixed by bolts 36m. As described above, the motor units 10 adjacent to each other along the axial direction D1 of the central axis AX are integrally connected. Therefore, the adjacent stators 2 along the axial direction D1 of the central axis AX are integrally connected.

Further, in the rotor 3, the rotor sleeves 33 arranged in the adjacent motor units 10 along the axial direction D1 of the central axis AX are fixed by bolts 33m. Therefore, the rotor 3 is integrally provided in the axial direction D1 of the central axis AX.

The configuration described in the above embodiment shows an example of the contents of the present invention, and can be combined with another known technique, and can be combined with other configurations without departing from the gist of the present invention. It is also possible to omit or change the part.

In the rotary

electric motors

1, 1 A, 1 B, the armature cores 21 are connected to each other by connecting the pins 9 of the armature cores 21 of the stator 2 adjacent to each other along the axial direction D 1 of the central axis AX. Although it is a structure electrically connected, it is not limited to this. The rotary

electric motors

1, 1 A, 1 B may be configured such that the pins 9 are in direct contact with each other when the stator 2 is arranged in the axial direction D 1 of the central axis AX. Thereby, the armature cores 21 are electrically connected. In the

rotary motors

1, 1 A, 1 B, when the armature core 21 has a connector instead of the pin 9 and the stator 2 is arranged in the axial direction D 1 of the central axis AX, A configuration in which connectors are fitted between the armature cores 21 adjacent to each other may be employed. Thereby, armature cores are electrically connected.

The rotary

electric motors

1A and 1B have a configuration in which the power supply unit 40 is electrically connected to the coil 20 of the stator 2 at the end portion disposed along the axial direction D1 of the central axis AX, but is not limited thereto. Not what you want. The rotary

electric motors

1A and 1B may be configured to be electrically connected to the coil 20 provided in the stator 2 other than the end of the central axis AX in the axial direction D1.

The above rotary

electric motors

1, 1A, 1B have a configuration in which the power supply unit 40 drives the plurality of stators 2 synchronously, but is not limited thereto. The rotary

electric motors

1, 1 A, 1 B may be configured to individually drive a plurality of stators 2.

A0, A1, A2, A3, A4, A5, A6, A7 Lead wire, AX central axis, D1 axial direction, D2 axial direction, P pitch, 1,1A, 1B rotary motor, 2 stator, 3 rotor, 4 bracket 5, power connector, 6 shaft, 7 bearing, 9, 9a, 9b, 9c, 9d, 9e, 9f, 9g, 9h, 9i, 9j, 9k, 9l pin, 10, 11, 12, 13 motor unit, 20 coils 21, 21A, 21B, 21C, 21D, 21E, 21F Armature core, 24 insulator, 27 slot cell, 30 permanent magnet, 33 rotor sleeve, 36 frame, 40 power supply unit, 50 controller.

Claims

A stator having an armature core wound with a coil;
A rotor provided rotatably with respect to the stator;
A power supply unit for supplying power to the stator,
The stator is arranged side by side in the axial direction of the central axis of the rotor,
The coils of the stator adjacent to each other along the axial direction of the central axis among the plurality of stators are electrically connected,
The electric power supply unit is electrically connected to the coil of the stator, and can drive the plurality of stators by supplying electric power to the stator.
The rotary electric motor according to claim 1, wherein the rotor is integrally provided in an axial direction of the central axis.
A plurality of the coils are arranged side by side at a pitch equal to the axial direction of the central axis,
At least one of the stators is arranged in a state where the phase of the coil is different in a direction around the axis of the central axis with respect to the stator arranged next to the axial direction of the central axis. The rotary electric motor according to claim 1 or 2.
At least one of the stators is arranged in a state in which the phase of the coil is shifted by a half phase of the pitch with respect to the stator arranged next to the axial direction of the central axis. The rotary electric motor according to any one of claims 1 to 3.
The rotary electric motor according to any one of claims 1 to 4, wherein the stators adjacent to each other along the axial direction of the central axis are integrally connected.
The said electric power supply part is electrically connected to the said coil of the said stator arrange | positioned at the edge part of the axial direction of the said center axis | shaft. The Claim 1 characterized by the above-mentioned. Rotating electric motor.
The rotary electric motor according to any one of claims 1 to 6, wherein the power supply unit can drive the plurality of stators in synchronization.