Space-vector pulse width modulation scheme for open-end winding induction motor drive configuration

Abstract

This study proposes a novel space-vector pulse width modulation scheme for an induction motor with open-end windings. The proposed PWM scheme requires two two-level inverters with isolated power supplies. This PWM scheme uses instantaneous phase reference voltages for the generation of gating signals. Open-end winding induction motor (OEWIM) offers significant switching redundancy. Thus, with the proposed scheme the required gating pulses can be generated to reduce the voltage stress on the switching devices. In addition, the switching scheme is capable of equalising the junction temperature rise during the switching and conduction state of the devices. In the present switching scheme when one inverter is switching while the other inverter is clamped and vice versa. The proposed scheme is simulated using MATLAB/Simulink. The PWM scheme is experimentally validated on dSPACE for a threelevel OEWIM.