B - Operations – Transporting – 23 – K
Patent
B - Operations, Transporting
23
K
327/67
B23K 9/09 (2006.01)
Patent
CA 1281083
Abstract A pulsed arc welding system comprises a current pulse generating circuit and a background current generating curcuit including a DC power supply circuit adapted for connection to a load via an electrode wire. A switch causes current pulses generated by the current pulse generating circuit to be applied to the load. The voltage applied by the circuits across the load is detected and the switch controls the pulse repetition rate to maintain a substantially constant predetermined arc voltage across the load. The invention is characterized by determining the lowest arc voltage that occurs in a predetermined time period immediately preceding the onset of each current pulse. This arrangement minimises problems that have occured in the past and avoids errors due to short circuiting.
538836
Brougham William Kenneth
Cheesman Gary Lyn
Leske David Michael
Ogilvie Graeme John
Commonwealth Scientific And Industrial Research Organization
Kirby Eades Gale Baker
Welding Industries Of Australia Pty. Ltd.
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