Welder

Details Welder Welder

B - Operations, Transporting

23

K

327/106

B23K 9/10 (2006.01) H02M 7/5383 (2006.01)

Patent

CA 1170316

ABSTRACT Welding apparatus and a method of producing a source of welding current. Use is made of an inverter supplied with direct current from a source to pulse a centre-tapped primary winding of a transformer at a frequency in excess of the audio range of frequencies, typically 10KHz to 20KHz. A secondary winding of the transformer has output terminals for electrical connection to an electrode and work to be welded. The operation of the inverter is controlled by means of a feedback signal derived from a winding inductively coupled to the transformer. The high operating frequency results in a significant reduction in the mass and dimensions of the welder compared to conventional elders which operate at mains frequencies.

392748

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