Switchable power supply with electronically controlled output cu

Details Switchable power supply with electronically controlled output cu Switchable power supply with electronically controlled output cu

1999-02-16

2000-08-22

Shaw, Clifford C.

Electric heating

Metal heating

By arc

2191304, 2191305, B23K 9067

Patent

active

061076023

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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