Patent ID: 8269434

Claim:
A system having a DC energy source, comprising: a three-phase motor having three motor phases that are driven by one of a first phase current signal (i a ), a second phase current signal (i b ) and a third phase current signal (i c ), the three-phase motor, the motor comprising: a first set of normal polarity windings each having a first magnetic polarity; and a second set of reversed polarity windings each having a second magnetic polarity that is opposite the first magnetic polarity, the first set of normal polarity windings being electrically isolated from the second set of reversed polarity windings; an inverter module coupled between the DC energy source and the motor, the inverter module comprising: a first set of normal polarity phase legs each being coupled to a corresponding one of the first set of windings; and a second set of reversed polarity phase legs each being coupled to a corresponding one of the second set of reversed polarity windings, and wherein inverting polarity of the second set of reversed polarity windings with respect to the first set of normal polarity windings and reversing direction of current signals flowing in the second set of reversed polarity windings with respect current signals flowing in the first set of normal polarity windings allows for an approximately zero net current flow in each of the three motor phases.