Electric heating – Metal heating – By arc
Patent
1996-01-11
1998-07-21
Shaw, Clifford C.
Electric heating
Metal heating
By arc
21913021, 219663, 363 97, B23K 910
Patent
active
057837996
ABSTRACT:
A welding power supply that includes a series resonant converter, including at least one switch and at least one capacitor is disclosed. The converter includes a switching circuit including an enable input. A voltage sensing circuit that determines the earliest safe switching time of the switch is provided. The safe switching time is the time that will prevent a peak voltage on the capacitor from exceeding a predetermined threshold for a next cycle of the converter. The voltage sensing circuit provides an enable signal to the enable input when the earliest switching time has passed, to enable the switching circuit. A pair of welding output terminals connected to the series resonant converter receives the output. A controller including a curve shaper, for providing a constant current output in the welding range is also disclosed. The controller also provides an adaptive hot start that provides varying amounts of energy in response to the welders skill.
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Corrigan George R.
Illinois Tool Works Inc.
Shaw Clifford C.
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