Rotary electric machine and method of manufacturing the same

Abstract

The present invention provides a rotary electric machine and a method for manufacturing a rotary electric machine that can efficiently cool a permanent magnet and a coil with a simple structure. A rotary electric machine(10) includes a rotor(20), a stator(30) and a case(50). The rotor includes a rotor core(21), a plurality of permanent magnets(22) disposed in the rotor core(21), and an end face plate(23) disposed such that an inside surface(23a) thereof is in contact with an end face of the rotor core(21). The stator(30) includes a stator core(31) and a coil(32) disposed in the stator core(31), and is disposed on an outer peripheral side of the rotor to face the rotor. The case(50) accommodates the rotor(20) and the stator(30), and includes a storage portion(51) for storing liquid therein.A lower part of the rotor(20) is immersed in the storage portion(51), and a liquid guide portion(60) is provided on an outside surface(23b) of the end face plate(23) to extend in a radial direction.

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.

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