In the inverter system of subway vehicles,the high speed operation of the switching devices will produce serious common-mode conduction interference.In order to predict common-mode conducted interfer-ence.The subway vehicle inverter system with rated power of 190 kW is taken as the research object,and the interference source and interference path are analyzed.The high-frequency parameters of each component of the common mode conducted interference path of the subway vehicle inverter system are extracted by finite ele-ment simulation software Ansys Q3D and impedance analyzer.Then,the full circuit model of common mode conducted interference of metro vehicle inverter system is built,and the simulation software Ansys Simplorer is used to simulate and analyze the full circuit model of the common mode conducted interference of metro vehicle inverter system.Finally,the simulation prediction results are compared with the field test ones.In the fre-quency range of 150 kHz to 3 MHz,the simulation prediction results are basically consistent with the field test ones.In the frequency range of 3 MHz to 30 MHz,the error between the simulation prediction results and the field test ones is about 8 dB due to the influence of grid-connected experiment,bench wiring,test probe transfer impedance and other factors.This proves that the modeling and analysis of the whole circuit model de-signed in this paper are correct.The research results have a good reference value for the prediction of common mode conducted interference level of subway vehicle inverter system.
维普
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