Permanent magnet motor cooling system for railway vehicle

Abstract

An embodiment of the invention provides a permanent magnet motor cooling system for a railway vehicle. The system comprises a permanent magnet motor and a cooling device, wherein the permanent magnetmotor comprises a motor body; the motor body comprises a rotor rotating shaft, a rotor, a stator winding, a stator and a shell; the cooling device comprises an outer air channel cooling fan, an outerwind path heat dissipation part, an inner air channel cooling fan and an inner wind path heat dissipation part; the inner air channel cooling fan is arranged at one end of the rotor rotating shaft inthe motor body; a heat conduction strip is arranged on the outer side wall of the stator; the inner wind path heat dissipation part is arranged on the outer side of the heat conduction strip in a sleeved mode; an inner wind path gap is formed between the inner wind path heat dissipation part and the outer side wall of the heat conduction strip; a stator rotor gap exists between the inner side wallof the stator and the rotor; the inner wind path gap is in clearance connection with the stator rotor to form an inner wind path; the outer air channel cooling fan is arranged on the rotor rotating shaft and is arranged outside the motor body; and the outer wind path heat dissipation part is arranged on the outer side of the shell. According to the embodiment, the permanent magnet motor for the railway vehicle can be effectively cooled.

Description

technical field [0001] The invention relates to the technical field of permanent magnet motors, in particular to a cooling system for permanent magnet motors used in rail vehicles. Background technique [0002] The motor plays a very important role in the vehicle. At present, more and more motors use permanent magnet motors. Due to the special requirements of permanent magnets, the permanent magnet motors need to be designed as a closed structure. Due to the limited space on the vehicle, the motor Cooling requirements are relatively high. [0003] The temperature rise of the permanent magnet motor is mainly divided into the iron loss caused by the stator and the copper loss caused by the stator winding. In the prior art, the common cooling method adopted by permanent magnet motors for rail vehicles is mainly the self-ventilation cooling method, and the self-ventilation cooling method uses air as the cooling medium. The specific implementation process is: installing heat sin...

AI Technical Summary

Problems solved by technology

[0005] An embodiment of the present invention provides a permanent magnet motor cooling system for rail vehicles to improve the problem that the self-ventilated cooling mode of permanent magnet motors has limited heat dissipation capacity and cannot effectively dissipate heat for larger power permanent magnet motors for rail vehicles

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