Patent ID: 7847437

Claim:
A method for controlling a double-ended inverter system coupled to a first energy source and a second energy source, the double-ended inverter system including a controller and a motor, the method comprising: determining, by the controller, a required output current for producing a commanded torque in the motor; determining, by the controller, a required voltage for producing the required output current in the motor; determining, by the controller, a constant power line associated with operation of the double-ended inverter system, the constant power line representing a desired power flow to the second energy source, each point along the constant power line corresponding to a combination of voltage commands capable of producing the required voltage while achieving the desired power flow to the second energy source; determining, by the controller, an operating point on the constant power line, the operating point producing a minimum power loss in the double-ended inverter system for the required output current, the operating point comprising a first voltage command and a second voltage command; and modulating, by the controller, the double-ended inverter system using the first voltage command and the second voltage command to operate the double-ended inverter system at the operating point.