POWER CONVERSION APPARATUS

摘要

PROBLEM TO BE SOLVED: To provide a power conversion apparatus that easily suppresses ripples of a DC voltage by changing a reference frequency when issuing an inverter voltage command.

SOLUTION: The power conversion apparatus includes: an inverter circuit 14 for converting a DC power source 11 to a three-phase AC output; an LC filter circuit 15 for smoothing the AC output voltage before output to a three-phase load circuit 16; a capacitor 13 for smoothing the DC power source before supply to the inverter circuit 14; an inverter control device 20 for detecting the AC output voltage output to the three-phase load circuit 16 and generating a voltage command for the inverter circuit 14 in accordance with the detection result; and a bandpass filter 25 for detecting the DC input voltage at the capacitor 13 and passing a harmonic signal component of a specific frequency band. A reference frequency for the voltage command from the inverter control device 20 to the inverter circuit 14 can thus be regulated in accordance with the voltage value of the DC power source 11.

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