CN-115333272-B - Rotary electric machine

Abstract

In a conventional rotating electrical machine in which current is supplied to a stator provided with a plurality of groups of multiphase windings, heat dissipation from a terminal plate and a terminal of a coil of the stator is not taken into consideration. It is necessary to reduce heat generation of a wiring board and a terminal of a rotating electric machine, thereby realizing high output. The rotating electrical machine includes a coil unit formed by arranging a plurality of groups of multiphase windings in a circular ring shape, a cylindrical housing surrounding the coil unit, a plurality of arc-shaped wiring boards arranged on one side of a stator in the axial direction and provided corresponding to the windings of each group and connected to the windings, and a plurality of terminals connected to the wiring boards and arranged on the housing via insulators.

Inventors

• Totsuka Fumiki
• INOUE MASAYA
• KUBOTA KEN

Assignees

• 三菱电机株式会社

Dates

Publication Date

20260508

Application Date

20220429

Priority Date

20210511

Claims (9)

1. 1. A rotating electrical machine having a stator, the stator comprising: A coil part formed by arranging a plurality of groups of multiphase windings in a circular ring shape; a cylindrical case surrounding the coil portion; A plurality of arc-shaped connection plates arranged on one side of the coil part in the axial direction, provided corresponding to the windings of each phase of each group, and connected to the windings, and A plurality of terminals, each of which is connected to the wiring board and is disposed on the housing via an insulating member, A part of the insulating member is replaced with a substitute insulating member provided with a terminal holding groove for holding the terminal, The substitute insulating member is provided in plural in correspondence with the number of the plural sets, The terminals corresponding to each of the plurality of groups and the substitute insulating member holding the terminals are arranged apart from each other in the circumferential direction, The rotating motor comprises a first control loop and a second control loop which are two groups of control loops, The winding is connected to the first control loop or the second control loop via the terminals, Supplying power corresponding to three-phase alternating current driving to the windings from the first control loop and the second control loop respectively in parallel, The windings are configured collectively in the circumferential direction for each group.
2. 2. The rotating electrical machine according to claim 1, wherein, In each region of the angle obtained by dividing 360 degrees by the number of groups, the groups of windings are collectively arranged.
3. 3. A rotary electric machine according to claim 1 or 2, wherein, The terminal plate is connected to the terminal at a center portion in a circular arc length direction.
4. 4. A rotary electric machine according to claim 1 or 2, wherein, The insulating member fixes the plurality of wiring boards to the coil portion in concentric circles.
5. 5. The rotating electrical machine according to claim 4, wherein, The insulator has a slot for securing the terminal block.
6. 6. A rotary electric machine according to claim 1 or 2, wherein, The terminal is fixed by being provided in the terminal holding groove of the substitute insulator.
7. 7. A rotary electric machine according to claim 1 or 2, wherein, The housing includes a terminal block for fixing the terminal.
8. 8. A rotary electric machine according to claim 1 or 2, wherein, The casing is provided with a refrigerant flow path inside.
9. 9. A rotary electric machine according to claim 1 or 2, wherein, The windings of each phase of each group are respectively and dispersedly wound on a plurality of pole teeth.

Description

Rotary electric machine Technical Field The present application relates to a rotating electrical machine. Background The use of rotating electrical machines in various fields has been expanding, and in recent years, higher output has been demanded. As a structure of the rotating electrical machine, there is a structure provided with a stator disposed so as to surround an outer periphery of a rotor. There is known a rotary electric machine in which a stator is provided with an iron core, a ring-shaped frame surrounding the iron core, and a plurality of groups of phase windings wound around the iron core, and a drive current is supplied from a plurality of drive circuits. By supplying current from a plurality of driving circuits, the output of the rotating electric machine can be improved (for example, patent document 1 and patent document 2). Prior art literature Patent literature Patent document 1 Japanese patent laid-open No. 2000-175420 Patent document 2 Japanese patent laid-open No. 2001-157487 In the rotating electric machines described in patent documents 1 and 2, a technique of supplying current from a plurality of driving circuits to a plurality of coils is disclosed. These rotating electric machines do not deal with heat generation of a wiring board or a terminal (external terminal) for distributing power to each group of coils. In a rotating electrical machine with an increased output, a problem occurs in that a current path for supplying current to each winding of a coil generates heat, which causes a problem of a high output. In a rotary electric machine supplied with current from a plurality of drive circuits, a wiring board provided for each phase distributing power to a plurality of sets of windings and terminals supplying current to the respective wiring boards are provided. The wiring board and the terminals generate heat due to the large current flowing. The terminal board and the terminal become causes of deterioration in function and reduction in life when they are in a continuously overheated state. Therefore, it is desirable to suppress heat generation of the wiring board and the terminals in preparation for an improvement in the output of the rotary electric machine. Disclosure of Invention The present application has been made to solve the above-described problems, and is to solve the problem of heat generation in a path in which current is supplied to a stator provided with a plurality of sets of multiphase windings. The object is to obtain a rotating electrical machine capable of reducing heat generated by a wiring board and terminals for supplying current to a stator provided with a plurality of groups of multiphase windings, and realizing high output. A rotary electric machine includes a stator including a coil unit formed by arranging a plurality of groups of multiphase windings in a circular ring shape, a cylindrical housing surrounding the coil unit, a plurality of arc-shaped connection plates arranged on one side of the coil unit in an axial direction, the connection plates being provided corresponding to the windings of the respective groups and connected to the windings, and a plurality of terminals connected to the connection plates, respectively, and arranged on the housing via insulators. According to the rotating electrical machine of the present application, by supplying current to the stator provided with the plurality of groups of multiphase windings via the plurality of arc-shaped wiring boards for each group, heat generation of the wiring boards and the terminals is reduced, and thus, a higher output of the rotating electrical machine can be achieved. Drawings Fig. 1 is a cross-sectional view of a rotary electric machine according to embodiment 1. Fig. 2 is a perspective view of a stator of the rotary electric machine according to embodiment 1. Fig. 3 is a perspective view of a coil of a stator of the rotating electric machine according to embodiment 1. Fig. 4 is a perspective view of an insulator of a stator of a rotary electric machine according to embodiment 1. Fig. 5 is a plan view of an insulator of a stator of a rotary electric machine according to embodiment 1. Fig. 6 is a plan view of an insulator provided with terminal holding grooves for a stator of a rotating electrical machine according to embodiment 1. Fig. 7 is a perspective view of a wiring board of a stator of a rotary electric machine according to embodiment 1. Fig. 8 is an enlarged view of a wiring board of a stator of the rotary electric machine of embodiment 1. Fig. 9 is a first assembly view of a stator of a rotary electric machine according to embodiment 1. Fig. 10 is a second assembly view of a stator of the rotary electric machine according to embodiment 1. Fig. 11 is a first cross-sectional view of an insulator of a stator of a rotary electric machine according to embodiment 1. Fig. 12 is a third assembly view of a stator of the rotary electric machine according to embodiment 1. Fig. 13 is a