Drive system for alternating current motors and electric motorized vehicles

摘要

A drive system for an alternating current motor including a three-phase alternating current motor, an inverter to drive the alternating current motor, and a controller to drive the inverter by pulse width modulation contains a means for performing pulse width modulation by comparing the carrier wave with the fundamental wave, by calculating the phase ¸fc of the carrier wave in order to perform pulse width modulation simultaneously with calculating the fundamental wave phase ¸d to the alternating current motor based on the instantaneous value of frequency command É1 of the alternating current motor calculated by the controller.