Five-leg voltage source inverter for driving two single-phase induction motors

Abstract

This paper presents the simulation of a five-leg voltage source inverter for driving independently two single-phase induction motors with different speeds. Carrier-based space vector pulse width modulation is used for the five-leg VSI. V/f scalar control is employed for those motors. The simulation results show that the speed for each motor can be independently control. Besides that, the advantages of the five-leg inverter are shared capacitor and dc bus together, reduced cost due to a decrease in power switch count and driver circuits and also switching losses.