Water cooling device for permanent magnet direct drive system of urban rail vehicle

Abstract

The embodiment of the invention discloses a water cooling device for a permanent magnet direct drive system of an urban rail vehicle. The water cooling device comprises a box body frame, wherein the box body frame is provided with a first cooling branch and a second cooling branch in a distributed mode; and the first cooling branch and the second cooling branch are arranged in the box body frame in an axial symmetric mode, and the first cooling branch/the second cooling branch can inhale low-temperature air from the two sides of the box body frame correspondingly, so that cooled cooling liquidflows into the interior of a first bogie permanent magnet direct drive system/a second bogie permanent magnet direct drive system to carry out liquid-cooling heat exchange on the first bogie permanent magnet direct drive system/the second bogie permanent magnet direct drive system while the low-temperature air is blew to a rail after completing the convection heat exchange process with high-temperature cooling liquid flowing out of the first bogie permanent magnet direct drive system/the second bogie permanent magnet direct drive system. According to the water cooling device for the permanentmagnet direct drive system of the urban rail vehicle, the purpose of simultaneously cooling the two permanent magnet direct drive systems is achieved, and meanwhile, the water cooling device integrates a control system so that the auxiliary power loss and noise can be effectively reduced while the water cooling device is protected.

Description

Technical field [0001] The invention relates to the technical field of heat exchange, in particular to a water cooling device for a permanent magnet direct drive system of urban rail vehicles. Background technique [0002] Compared with the traditional asynchronous motor traction system, the permanent magnet direct drive system cancels the transmission gear box, reduces the mechanical transmission consumption, and reduces the transmission noise. Therefore, the permanent magnet direct drive traction system has begun to be popularized and applied in the next generation of urban rail transit vehicles. However, due to its high power density and large heat loss per unit volume, liquid cooling is generally used to improve heat dissipation efficiency and ensure the safe and reliable operation of the system. At present, the existing permanent magnet direct drive cooling system is generally equipped with a water cooling device for each bogie, and the structure is not compact, the total vo...

AI Technical Summary

Problems solved by technology

At present, the existing permanent magnet direct drive cooling system is generally equipped with a water cooling device for each bogie, the structure is not compact, the total space occupied by urban rail vehicles is large, the total weight is heavy, and the total auxiliary power consumption is high

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