Rotary electric machine

Abstract

The invention provides a rotary electric machine capable of effectively cooling permanent magnets and coils with a simple structure. The rotary electric machine (10) comprises a rotor (20) which has arotor core (21), a plurality of permanent magnets (22) disposed on the rotor core (21), and an end plate (23) disposed so that the inner side surface (23a) contacts an end surface of the rotor core (21); a stator (30) comprising a stator core (31) and a coil (32) disposed on the stator core (31). The stator (30) is disposed on the outer peripheral side of the rotor (20) so as to face the rotor (20). A housing (50) accommodates the rotor (20) and the stator (30) and has a reservoir (51) for storing the liquid therein. The lower part of the rotor (20) is immersed in the reservoir (51). On the end plate (23), a radially extending liquid guide groove (23c) or liquid guide hole (23f) is provided on the outer surface (23b).

Description

technical field [0001] The present invention relates to a rotating electrical machine that can be mounted on a vehicle or the like. Background technique [0002] In recent years, in a hybrid vehicle or an EV vehicle using a rotating electric machine as a drive source, temperature rises of permanent magnets and coils, which greatly affect the performance of the rotating electric machine, have become a problem, and efficient cooling has become a problem. [0003] In the driving device described in Patent Document 1, it is described that the refrigerant is supplied to the permanent magnet and the coil through the refrigerant passage formed inside the end plate from the collecting tank, wherein the collecting tank receives the refrigerant driven by the gear. The refrigerant. Furthermore, it is described that when supplying the refrigerant to the refrigerant passage formed inside the end plate, a notch is formed in the flange portion supporting the rotor shaft of the end plate, ...

AI Technical Summary

Problems solved by technology

[0010] However, in the structure described in Patent Document 1, since the refrigerant is carried by the gears, a collection tank is required, and the shape of the casing becomes complicated, and the shape of the rotor shaft also becomes complicated.

[0011] In addition, in the structure described in Patent Document 2, the permanent magnets cannot be sufficiently cooled, and the shape of the rotor shaft becomes complicated for oil supply to the shaft center, and a hydraulic pump and a refrigerant ejection device need to be separately installed.

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