Synchronous Rectification on an Arc-Welding Application

摘要

A Synchronous Rectification (SR) stage is proposed in resonant converters operating in current sourcernmode for an arc welding power supply architecture. SR stages, which are designed originally forrnregulated output voltage, are adapted to operate in current mode. In addition, a novel control whichrneliminates the dead times of the power MOSFETs’ switching periods is presented. Finally, arncomparison between commercial solutions for SR and the proposal has been performed.