Power conversion device and refrigeration/air-conditioning system

摘要

A power conversion device according to the present invention includes a power supply (1), a booster unit (a reactor (21), a switch (22)) that boosts a voltage supplied from the power supply (1) by switching control, a smoothing circuit (3) that smoothes an output voltage from the booster unit, a rectifier (23) that is arranged between the booster unit and the smoothing circuit (3) to prevent a current reverse flow toward the booster unit, and a commutation unit (4) that is connected to the rectifier (23) in parallel to commutate a current flowing through the rectifier (23) toward itself.