Novel Carrier based PWM Techniques Reduce Common Mode Voltage for Six Phase Induction Motor Drives

This paper proposes a novel pulse width modulation (CBPWM) technique for reducing the common mode voltage for a six-phase induction motor (SPIM) drive. This proposed CBPWM technique relies on setting up offset functions and the phase shift of carrier wares. Common mode voltage occurs under the effect of DC power Vd always in Vd/6 limits. Some ways of designing the offset function are proposed; these proposed strategies permit to reduce either the mean value or the instantaneous value of the common mode voltage. Features of proposal CBPWM solutions have been compared. Simulation and experimental results demonstrate the feasibility of the proposed solution.