High-Frequency Modeling of Surge Voltage Mitigation in Long-Cable-Fed PMSM-Drive System with Adaptive Impedance Coils

This paper aims to develop a high-frequency distributed model of the stator windings of permanent magnet synchronous machines (PMSM) fed by wide bandgap (WBG) drives with long cables. Specifically, the high-frequency distributed models of PMSM stator windings are investigated in the Ansys Electronics Desktop, and the WBG voltage source inverter and its PWM strategy are implemented in Ansys Maxwell Circuit. Distributed prameter circuit models are constructed to examine the nonlinear high-frequency surge voltage distribution in the stator windings of an interior PMSM. Moreover, a finite element model is used to extract the distributed parameters for the high-frequency modeling of the PMSM stator windings. The proposed high-frequency models are developed by calculating the winding parasitic capacitance matrix using the electrostatic solver. After that, the electrostatic and magnetic solvers are coupled by using the calculated capacitance in the magnetic solver. Finally, the induced overvoltage across the motor stator windings are investigated with a novel adaptive impedance coil (AIC) overvoltage mitigation method.