Eliminating the common-mode voltage in AC drive systems using a four-phase machine

This paper investigates the utilization of a machine drive configuration that permits to eliminate the common-mode voltage. The drive system employs a four-phase inverter and a four-phase induction motor. A complete analytical model of the four-phase induction machine is presented. The pulse-width modulation technique for generating the gate signals for the power switches of the four-phase inverter is also presented. Simulation and experimental results are presented to demonstrate the feasibility of the proposed solution.