INVERTER CIRCUIT FOR ELECTRIC WELDING MACHINE HAVING INPUT VOLTAGE SELECTION FUNCTION GENERATING OPTIMIZED OUTPUT VOLTAGE

摘要

PURPOSE: An inverter circuit for an electric welding machine with input voltage selection function is provided to simply convert optimized voltage to one or more output voltage and control the operation of a system.;CONSTITUTION: A first and second input voltage processing units(1,2) are parallel connected. A first input voltage processing unit comprises a first rectifier(4) and first conversion unit(5). A second input voltage processing unit comprises a second rectifier and second conversion unit(7). The first and second rectifiers are optimized to one or more input voltage. The first and second rectifiers rectify AC voltage to DC voltage. The voltage conversion comprises a first and second switch and one or more semiconductor switching device. An output control unit comprises a transformer.;COPYRIGHT KIPO 2010