D.C. impulse arc welder employing thyristors

Details D.C. impulse arc welder employing thyristors D.C. impulse arc welder employing thyristors

1985-06-07

1986-12-09

Wong, Peter S.

Electric power conversion systems

Current conversion

Including d.c.-a.c.-d.c. converter

307108, 21913051, H03K 353, B23K 910

Patent

active

046284273

ABSTRACT:
Apparatus for producing an impulse welding current which can be used in shielded-arc welding. The apparatus includes a thyristor connector in a series circuit to a primary winding of an impulse transformer and a second thyristor and a compacitor, the secondary winding of the impulse transformer being connected to a diode to the welding arc. The apparatus increases the coefficient of the impulse welding current and reduces the steepness of the positive fronts of the voltage imposed upon the thyristors.

REFERENCES:
patent: 3474214 (1969-10-01), Ferguson
patent: 4009365 (1977-02-01), Kaley et al.
patent: 4048468 (1977-09-01), Maule

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