B - Operations – Transporting – 23 – K
Patent
B - Operations, Transporting
23
K
B23K 9/10 (2006.01) B23K 11/24 (2006.01) B23K 13/08 (2006.01)
Patent
CA 2518125
A three stage power source for an electric arc welding process comprising an input stage having an AC input and a first DC output signal; a second stage in the form of an unregulated DC to DC converter having an input connected to the first DC output signal, a network of switches switched at a high frequency with a given duty cycle to convert the input into a first internal AC signal, an isolation transformer with a primary winding driven by the first internal high frequency AC signal and a secondary winding for creating a second internal high frequency AC signal and a rectifier to convert the second internal AC signal into a second DC output signal of the second stage, with a magnitude related to the duty cycle of the switches; and, a third stage to convert the second DC output signal to a welding output for welding wherein the input stage has a regulated DC to DC converter with a boost power switch having an active soft switching circuit.
Kooken Todd E.
Luo Lifeng
Gowling Lafleur Henderson Llp
Lincoln Global Inc.
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