WELDING MACHINE

摘要

An inverter circuit of a full-bridge structure comprising first through fourth switching elements; first through fourth backward diodes connected in parallel with the respective switching elements; a power transformer; a rectifying part for rectifying an output from the secondary side of the power transformer; an output detector for detecting an output from the rectifying part; an error amplifying part for amplifying the error between a signal from the output detector and an output setting signal; a first driving part for controlling the first and second switching elements; a second driving part for outputting drive signals to the third and fourth switching elements; and a driving circuit for sending ON/OFF control signals to the first and second driving parts at different timings.