Spike welding system having improved power supply

Details Spike welding system having improved power supply Spike welding system having improved power supply

B - Operations, Transporting

23

K

327/103, 327/106

B23K 11/24 (2006.01)

Patent

CA 1244096

ABSTRACT OF THE DISCLOSURE A power supply for a pulse type electrical resistance welder includes an A.C. source of electrical power, a firing circuit for delivering spikes of current to a pair of welding electrodes and a precharging circuit for precharging the firing circuit with a quantity of electrical energy sufficient to produce satistactory welds in the first cycle or first few cycles of power. The precharging circuit is controlled by control circuit which includes a thumb wheel switch for presetting the voltage to which the firing circuit is to be precharged. A relay circuit automatically disconnects the precharging circuirt from the firing circuit before the later discharges its energy to the welding electrodes. A safety circuit is provided for automatically discharging the firing circuit in the event of a power failure.

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