ARC WELDER WITH SERIES-PARALLEL RESONANT DC-DC CONVERTER

摘要

A resonant DC-DC high power converter operating above resonance frequency used as a dc current source for arc welding is described. The resonant dc-to-dc converter consists of input single-phase diode bridge rectifier, capacitor filter, high frequency series-parallel resonant inverter, high frequency power transformer and high frequency diode output rectifier. The experimental results of a 3 kW DC-DC converter working at switching frequency from 25 kHz to 50 kHz are presented.