Conducted EMI Modeling Method for High-Voltage High-Power Motor Drive System

With the deep application of power electronic technology under high voltage and high power conditions, the current EMI modeling method of motor drive system has been and cannot meet the increasingly accurate electromagnetic compatibility (EMC) characterization requirements. In order to solve the problem of high frequency electromagnetic interference (EMI) caused by high voltage and high power environment, this study takes a high voltage and high power motor drive system as an example, and focuses on the EMC modeling method of power electronics in motor drive system. Aiming at the operating characteristics of IGBT under high voltage and high power, a double pulse test platform is built to capture the complete on / off waveform and parasitic parameters. A complete IGBT switching waveform model is established by using the piecewise function fitting technique. The impedance model of the motor is established by vector matching method. The feasibility and effectiveness of the model are verified by comparing the simulation results with the experimental data. This study provides a validated model for optimizing the internal structure of motor drive systems and suppressing conducted interference noise, particularly suitable for high-voltage and high-power conditions.