Optimum PWM Switching Mode Selection of Dual Inverter-fed Open Winding IPMSM Drive System for High-power Premium Class EV

A dual inverter-fed open winding interior permanent magnet synchronous motor employing a dual battery source is found to be a promising drive system configuration for a high-power premium class electric vehicle. From the standpoints of high drive system efficiency and low motor acoustic noise, in this paper, selection of different optimum PWM switching modes according to the vehicle driving states is proposed for such a drive system configuration. Suitable simulation and experimental results for the motor drive system with 65 kW are presented to validate the proposed selection of different optimum PWM switching modes based on the vehicle driving states.