Electronic welding station with AC and reversible polarity DC ou

Details Electronic welding station with AC and reversible polarity DC ou Electronic welding station with AC and reversible polarity DC ou

1989-06-30

1991-06-18

Shaw, Clifford C.

Electric heating

Metal heating

By arc

B23K 910

Patent

active

050251279

ABSTRACT:
An electronic welding station suitable for use with a dedicated power supply or for use in a system wherein a plurality of electronic welding stations are powered from a central power supply. The welding station provides for a positive ground mode, a negative ground mode, and two AC output modes of operation. Most components are used for all modes of operation. The main transistor bank (57) and an auxiliary transistor bank (64) are used in an emitter follower configuration for negative ground mode, a common emitter configuration for positive ground mode, and, in conjunction with an inductor/transformer (67), in a push-pull configuration for both AC output modes of operation. The inductor/transformer (67) is configured as an inductor for DC output operation and, by the insertion of a plug (67E), as a transformer for AC output operation. Selection of the positive ground mode, the negative ground mode, or an AC output mode is achieved by the use of a multi-pole switch (25) and a jumper (90). The result is an extremely versatile electronic welding station.

REFERENCES:
patent: 2133919 (1938-10-01), Fries
patent: 2200632 (1940-05-01), Mills
patent: 2228731 (1941-01-01), Pugh
patent: 3059164 (1962-10-01), Johnson
patent: 3665150 (1972-05-01), Mejia
patent: 3686464 (1972-08-01), Hirst
patent: 4469933 (1984-09-01), Mizuno et al.
patent: 4861965 (1989-08-01), Stava

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