Power selection and protection circuit for inverter power supply

Details Power selection and protection circuit for inverter power supply Power selection and protection circuit for inverter power supply

1996-01-11

1998-10-20

Shaw, Clifford C.

Electric heating

Metal heating

By arc

363142, B23K 910

Patent

active

058249907

ABSTRACT:
An inverter power supply for use with various voltage inputs is provided. The inverter power supply generally receives 208 VAC single-phase, 208 VAC three-phase, 230 VAC three-phase, 230 VAC single-phase, 460 VAC single-phase, or 460 VAC three-phase power and provides a DC output current for welding, heating or cutting applications. The power inverter circuit includes a first tank circuit and a second tank circuit which are configured in serial or parallel according to a particular voltage input. Dual contactor switches respond to control signals from an AC sense circuit in order to configure the inverter power supply for the appropriate voltage input. The dual contactors may be mechanically interlocked and driven off the DC power for the control board.

REFERENCES:
patent: 3815009 (1974-06-01), Berger
patent: 4845607 (1989-07-01), Nakao et al.
patent: 5272313 (1993-12-01), Karino et al.
patent: 5310992 (1994-05-01), Karino et al.
patent: 5319533 (1994-06-01), Reynolds et al.
patent: 5446641 (1995-08-01), Reynolds et al.

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