Method of driving electric machine where half bridge idle times are compensated, involves determining dead time compensation correction value of pulse width modulation (PWM) next alternate ends from difference of desired and actual PWM

摘要

The correction values are determined for the dead time compensation for the next alternate ends of pulse width modulation (PWM) from a difference of the desired PWM and the actual PWM. The correction values correspond to the corrective dead times and the PWM adjustments. The difference between the desired PWM and the actual PWM of the detected PWM current is used as PWM correction for compensating for the dead time at the earliest at alternate ends of PWM. A current sensor-less motor is driven using an inverse motor model for the control of electric machine. An independent claim is included for a method for electroless sensorless control of an electric machine in which dead times of the half-bridge are compensated.