INVERTER DRIVER, AND AIR CONDITIONER, REFRIGERATOR, AND CHILLER WITH INVERTER DRIVER

摘要

PROBLEM TO BE SOLVED: To provide an inverter driver capable of reducing recovery loss while suppressing increase in cost, and to provide an air conditioner, a refrigerator, and a chiller with the inverter driver.SOLUTION: A half-bridge circuit is configured by connecting the primary winding of a transformer 8 between the joints of upper and lower switching elements 11 and 13 for driving transformer connected in series in the voltage application direction, and the neutrals of upper and lower capacitors 15 and 16 connected in series in the voltage application direction. A commutation circuit 62 connected in parallel with reflux diodes 5 and 7, connected in reverse parallel with switching elements 4 and 6 for conversion, is provided for each phase by connecting auxiliary diodes 9 and 10 having excellent high speed and reverse recovery characteristics in series with the secondary windings of the transformer 8 having polarities different from each other, and the neutrals of the upper and lower capacitors 15 and 16 are interconnected between respective phases.