AC waveform inverter power supply apparatus for metallic member joining or reflow soldering

摘要

An AC waveform inverter power supply apparatus is disclosed comprising a rectifying circuit (10) which converts an AC commercial supply into a DC voltage, an inverter (16) which converts the DC voltage into a pulsed voltage and, a transformer (18) connected to the inverter. The apparatus further includes a weld time setting means arranged to set a weld time, an AC waveform cycle setting means which divides the set time into AC waveform cycles, and a control means (32) which controls switching of the inverter in such a manner as to allow the inverter to issue high-frequency pulses with one polarity in one half cycle of the divided set time and of other polarity in the latter half cycle thereof. A display (54) may also be provided to show the setting of the AC waveform cycle setting means. <IMAGE>