Advantageous use of a dual operation, linear and switching power module in drive control with no deadtime

This paper investigates the difference between linear and PWM driving methods for the speed sensorless control of permanent magnet synchronous machines (PMSM) using intelligent power modules (IPMs). Furthermore, using a developed PWM inverter, which is constructed by the new IPM, this paper compares the PWM operation mode of the IPM with the PWM control of this inverter. Furthermore, the usefulness of a two operation mode switching control scheme is discussed.