A Practical Software Strategy to Reduce DC Bus Bar Surge Voltage in AC Drives Fed by VSI

This paper proposes a new software strategy using rate limiter for torque command to reduce the surge voltage of DC bus bar in AC drives fed by voltage source inverter (VSI). Experimental results show that a remarkable reduction of surge voltage is achieved. The proposed software strategy is special useful to the AC drives with the frequent operation of start, stop and reversal.