The traction system of urban rail transit vehicles is recognized as one of the main electromagnetic interference sources significantly impacting the electromagnetic compatibility of trains,primarily attributed to the implementation of pulse width modulation control,which involves high voltage,high current,and pulse interference characteristics.This study analyzed the main electromagnetic emission loops of the traction inverter system,taking into account both the vehicle system design and the flow path of electromagnetic in-terference current.By establishing a simplified calculation model for high-frequency interference currents,this study explored the meth-od for designing filtering parameters aimed at reducing electromagnetic emissions from the traction system.Moreover,a comparative simulation was conducted to evaluate the suppression effects of various filtering schemes.Finally,the effectiveness of the proposed opti-mization method was verified by external radiation emission tests using trains.
维普
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