Patent ID: 7782005

Claim:
A power converter control unit for a power converter including an inverter configured to convert a direct current voltage into an alternating current voltage by controlling switching devices to be turned ON or OFF based on a control signal and to output the alternating current voltage to a load, the control unit comprising: a command value output unit configured to output a command value; a carrier wave output unit configured to output a carrier wave having a frequency; a frequency changing unit configured to output the frequency to the carrier wave output unit, the frequency changing over time; a compensator connected to the frequency changing unit and configured to receive the frequency of the carrier wave from the frequency changing unit, to compensate the command value responsive to the frequency of the carrier wave to obtain a command value signal and to output the command value signal; and a control signal generator configured to compare the command value signal with the carrier wave and to generate the control signal based on a comparison result.