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Abstract

A power conversion device having an addition value calculation circuit which obtains addition values of maximum phases and minimum phases of first output voltage command signals, an effective value calculation circuit which obtains an effective value of an output voltage command based on the first output voltage command signals, coefficient determination means for determining a coefficient which minimizes power loss of the three-phase voltage inverter based on the effective value, a value of the DC voltage, and an output power factor command, a control amount calculation circuit which obtains control amounts by multiplying the addition values, an output voltage command signal control circuit which obtains second output voltage command signals as signals resulting from subtraction of the control amounts respectively from the three phases of the first output voltage command signals, and a PWM control circuit which generates gate signals based on the second output voltage command signals.

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