H - Electricity – 05 – B
Patent
H - Electricity
05
B
327/67
H05B 7/148 (2006.01) B23K 9/067 (2006.01) B23K 9/09 (2006.01)
Patent
CA 1184253
Control System and Method for DC Pulse Modulated Arc Welding Abstract A method of pulsed direct current (DC), arc welding with a feedback control system is disclosed wherein the duty cycle of current pulses supplied by a power supply is controlled in response to resistance sensed at an arc gap to maintain a constant time-averaged power flow to work pieces which are welded. The feedlock control system includes a voltage sensor, a high-low regulator, and a duty cycle signal generator. This pulsed DC arc welding is especially useful with a type of pulsed DC arc welding wherein the ratio of peak current to maintenance current is maintained at a selected high value and the current is cycled in a time duration whereby oxides on the surface of the work pieces are dissipated when making the weld. Also, a control system is disclosed for automatically adjusting pulse width of current pulses supplied at an arc gap by a pulsed DC arc welding system power supply, to control power flow to work pieces at the arc gap.
400579
Jackson Dale E.
Moyer Ross A.
Wright William E. Jr.
Carrier Corporation
Gowling Lafleur Henderson Llp
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