Patent ID: 8269142
Filing Date: 2012-09-18
Classification: B23K

Abstract:
1. A weld current generating apparatus, comprising: a voltage conversion circuit capable of receiving an AC voltage from an AC voltage input terminal and converting the AC voltage to a DC voltage; a control circuit capable of receiving the DC voltage and outputting control signals; and a charge/discharge circuit capable of receiving the DC voltage and being charged by the DC voltage or discharged according to the control signals; wherein the charge/discharge circuit is capable of outputting a continuous weld current during discharging process; wherein the voltage conversion circuit comprises a transformer; the transformer comprises a ground terminal; the control circuit comprises a first winding, a second winding, and a multiple switch; the multiple switch comprises a first terminal, a second terminal, and a third terminal; the first terminal of the multiple switch is capable of receiving the DC voltage; and the second and third terminals of the multiple switch are electrically coupled to the ground terminal via the first and second windings respectively.