A Method to Reduce Common-mode Voltage of Dual Three-Phase Motor Based on TSPWM

Common-mode voltage is created by variable frequency drives. And it brings problems to the motor drive systems. Six-phase inverter has a total of 64 switching state vectors. And the space vector classification technique is one of the main modulation methods of dual three-phase motor drive systems. In order to reduce the common-mode voltage of the dual three-phase drive system, this paper proposed a new PWM method based on TSPWM. The new method is compared with the traditional space vector classification technique, and the results of simulation and experiments are given to prove the effects.