Research on Conducted Interference of Motor Drive System

The electromagnetic interference (EMI) issues in motor drive system are becoming increasingly serious as a result of the rising integration and power density requirements for motor drives. In order to handle the EMI issues in the motor drive system, it is necessary to determine the conducted EMI of the system. Therefore, the conducted interference prediction model of the motor drive system is established in this paper. First, the conducted interference path of the motor drive is analyzed. Then, the conducted interference prediction model of the drive system is accurately modeled, including the measurement equipment line impedance stabilization network (LISN), inverter, cable and motor. To accurately simulate the electromagnetic field in the system, the high-frequency characteristics of the capacitors and the parasitic parameters between the inverter and the heat sink are considered. Finally, the motor drive system is simulated with MATLAB/Simulink, and the simulation results agree better with the experimental measurements.