Patent ID: 7843156
Filing Date: 2010-11-30
Classification: H02P

Abstract:
1. A method for controlling an inverter, the inverter operable to provide an output voltage to an electric motor, the method comprising: determining if a commanded output frequency of the inverter does not exceed a first pre-determined threshold; determining, if the commanded output frequency does not exceed the first pre-determined threshold, if a commanded stator current of the inverter exceeds a second pre-determined threshold; producing a first command if the commanded stator current exceeds the second pre-determined threshold, the inverter receiving a first gate voltage in response to the first command and providing the output voltage in response to the first gate voltage; and producing a second command if the commanded stator current does not exceed the second pre-determined threshold, the inverter receiving a second gate voltage in response to the second command and providing the output voltage in response to the second gate voltage, the first gate voltage greater than the second gate voltage.