DC-AC CONVERSION DEVICE AND CONTROL CIRCUIT

摘要

Provided is a DC-AC conversion device capable of reducing ripple current output from a battery. A DC-AC conversion device, including a DC-DC conversion circuit having a full bridge circuit, a DC-AC conversion circuit converting DC voltage output from the DC-DC conversion circuit into AC voltage, a coil with one end connected to one DC terminal of the DC-DC conversion circuit, and a capacitor connected between the other end of the coil and the other DC terminal, comprises: a short-circuit control part controlling switching so that a leg of the full bridge circuit is temporarily short-circuited; a phase reverse control part controlling switching of the full bridge circuit so that a phase of AC voltage output from the full bridge circuit is reversed, after the leg of the full bridge circuit is temporarily short-circuited; and a short-circuit duration variation part varying a duration for which the leg of the full bridge circuit is short-circuited at a specific cycle according to a cycle of AC voltage output from the DC-AC conversion circuit.