Patent ID: 8054032

Claim:
A method for controlling a double-ended inverter system having a first inverter and a second inverter, the second inverter having a first leg associated with a first phase current, a second leg associated with a second phase current, and a third leg associated with a third phase current, when the first phase current is greater than the second phase current and the third phase current, the method comprising: if the first phase current is greater than a desired second inverter current: modulating the first leg at a first duty cycle; and clamping the second leg and the third leg to a negative voltage rail of the second inverter; and if the first phase current is less than the desired second inverter current: clamping the first leg to a positive voltage rail of the second inverter; and if the second phase current is greater than zero: clamping the third leg to the negative voltage rail; and modulating the second leg at a second duty cycle.