Patent ID: 7319206
Filing Date: 2008-01-15
Classification: B23H,B23K,H02M

Abstract:
1. A welding power source capable of receiving a range of input voltages, comprising: an input circuit and boost stage configured to receive an ac signal and provide a boosted dc signal; an inverter configured to receive the boosted dc signal and providing a second ac signal and configured to receive at least one control input; an output transformer configured to receive the second ac signal and providing a third ac signal having a current suitable for welding; an output circuit configured to receive the third ac signal and providing a welding signal; a controller configured to provide at least one control signal to the inverter and at least a second control signal to the input circuit and boost stage, wherein the controller includes a power factor correction circuit and the second control signal is responsive to the power factor correction circuit; and an auxiliary power source configured to receive a range of input voltages and providing a control power signal to the controller.