Electric ARC welder and plasma cutter

Details Electric ARC welder and plasma cutter Electric ARC welder and plasma cutter

1998-11-05

2000-02-08

Walberg, Teresa

Electric heating

Metal heating

By arc

363 89, B23K 900

Patent

active

060230371

ABSTRACT:
A single phase power supply module for electric arc welders and plasma arc cutters comprising: a single phase input stage; positive and negative output terminals; a full wave rectifier connected to the input stage for rectifying the single phase voltage at the input stage; a buck converter type power factor correcting circuit for controlling current flow from the input stage to the rectifier, which buck converter has an output capacitor regulated to an intermediate voltage in the range of 100-150 volts; and, a high speed DC to DC converter having an internal transformer coupling applying voltage across the output terminals and means for regulating the applied voltage to an output voltage in the range of 0-113 volts. The module is universal and several can be connected in parallel, in series or to switch networks to construct several welders or cutters.

REFERENCES:
patent: 4447695 (1984-05-01), Inoue
patent: 4564742 (1986-01-01), Karlsson
patent: 4890215 (1989-12-01), Freedman
patent: 4918285 (1990-04-01), Thommes
patent: 5235504 (1993-08-01), Sood
patent: 5331212 (1994-07-01), Johnson-Williams et al.
patent: 5351175 (1994-09-01), Blankenship
patent: 5430635 (1995-07-01), Liu
patent: 5440179 (1995-08-01), Severinsky
patent: 5786992 (1998-07-01), Vinciarelli et al.
patent: 5875104 (1999-02-01), Prager
patent: 5894414 (1999-04-01), Jiang

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