Electric heating – Metal heating – By arc
Patent
1990-12-28
1993-06-15
Shaw, Clifford C.
Electric heating
Metal heating
By arc
21913051, B23K 910
Patent
active
052201511
ABSTRACT:
There is disclosed a power source apparatus for an alternating-current arc welding. In the power source apparatus, a reference signal generator periodically generates a reference signal having a predetermined waveform, and a direct-current power source outputs a current periodically changing in response to the reference signal, the outputted current having a waveform corresponding to that of the reference signal. Thereafter, a switching circuit supplies an alternating-current welding current to a welding load so as to sequentially change the polarity of the welding current from a straight polarity to a reverse polarity and from the reverse polarity to the straight polarity in synchronization with the reference signal by switching the current outputted from the power source in response to the reference signal.
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Fukumoto Narumi
Ioroi Hirokazu
Ishii Hiroyuki
Terayama Kikuo
Daihen Corporation
Shaw Clifford C.
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