Pressure Characteristics and Temperature Rise Calculation of Traction Converter for High Speed EMU

doi:10.11985/2023.02.030

Abstract

Abstract:

In order to analyze the influence of the surface pressure of the train on the air inlet and outlet of the traction converter and the cooling effect of the traction converter during the operation of the high-speed electric multiple units(EMU), the aerodynamic model of the open line operation of the train is established. The pressure distribution characteristics of the high-speed EMU running at the speed of 350 km/h are obtained by numerical simulation. The results show that the air inlet and outlet of the traction converter are all negative pressure, the average pressure difference between the air outlet and inlet is negative, which is conducive to the ventilation and heat dissipation of the traction converter. Then, according to the structure characteristics of the traction converter, the simulation models of the liquid cooling subsystem and the air cooling subsystem are established respectively, and the insulated gate bipolar transistor(IGBT) component temperature rise of the main inverter assembly, rectifier assembly and auxiliary inverter assembly, as well as the temperature rise of the electrical components such as transformer and reactor are obtained. Finally, the accuracy of the simulation results and the cooling effect of the traction converter are verified by the temperature rise test. The calculation of pressure characteristics and temperature rise of the traction converter has certain significance for the development of high speed EMU.

Key words: High speed EMU, traction converter, aerodynamics, pressure characteristics, temperature rise calculation

CLC Number:

U270

DING Jie, YIN Liang. Pressure Characteristics and Temperature Rise Calculation of Traction Converter for High Speed EMU[J]. Journal of Electrical Engineering, 2023, 18(2): 287-294.

Figures/Tables 13

References 21

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位置	2号车	3号车	6号车	7号车
进风口1	-97	-140	-61	-65
进风口2	-101	-136	-68	-66
出风口1	-185	-355	-307	-277
出风口2	-173	-347	-353	-321
出风口3	-161	-318	-274	-253
出风口4	-157	-280	-212	-201
进风口平均值	-99.0	-138.0	-64.5	-65.5
出风口平均值	-169.0	-325.0	-286.5	-263.0
出风口与进风口差值	-70.0	-187.0	-222.0	-197.5