Rotating electric machine and method for manufacturing rotating electric machine

Abstract

The present invention provides a rotating electric machine capable of efficiently cooling permanent magnets and coils with a simple structure, and a method of manufacturing the rotating electric machine. A rotating electric machine (10) includes a rotor (20) having a rotor core (21), a plurality of permanent magnets (22) arranged on the rotor core (21), and an inner surface (23a) arranged so that the rotor core ( 21) an end plate (23) in contact with the end surface; a stator (30) having a stator core (31) and a coil (32) disposed on the stator core (31), and the stator is on the outer periphery of the rotor (20) The side is arranged to face the rotor (20); and the casing (50) accommodates the rotor (20) and the stator (30), and has a storage part (51) storing liquid therein. The lower part of the rotor (20) is immersed in the storage part (51), and the liquid guide part (60) extending in the radial direction is provided on the outer surface (23b) of the end plate (23).

Description

technical field [0001] The invention relates to a rotating electrical machine and a method for manufacturing the rotating electrical machine. 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 from the collecting tank is supplied to the permanent magnet and the coil through the refrigerant passage formed inside the end plate, wherein the collecting tank receives the refrigerant driven by the gear. of 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 en...

AI Technical Summary

Problems solved by technology

[0010] However, in the structure described in Patent Document 1, the collection tank is required to carry the refrigerant through the gears, which complicates the shape of the housing and complicates the shape of the rotor shaft.

[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.

Images