Device and method for starting electric arc of a welder

Details Device and method for starting electric arc of a welder Device and method for starting electric arc of a welder

1991-03-13

1992-05-26

Shaw, Clifford C.

Electric heating

Metal heating

By arc

2191304, B23K 9067

Patent

active

051170884

ABSTRACT:
A method and apparatus for starting the electric arc of a welder by applying a high frequency, high voltage starting signal across the spark gap between the electrode and workpiece of the welder. This device and method comprises a series resonant circuit having a capacitive reactance element and an inductive reactance element combining to establish a resonant frequency for the series circuit, electrical drive means for energizing the series circuit at a driving frequency near a harmonic of the resonant frequency and means for converting the voltage developed across at least a portion of a designated one of the elements, generally the inductive reactance, into the starting signal.

REFERENCES:
patent: 3586817 (1971-06-01), Manz
patent: 3617689 (1971-11-01), Manz
patent: 3876855 (1975-04-01), Hirasawa et al.
patent: 4417129 (1983-11-01), Young
patent: 4767912 (1988-08-01), Eldridge

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