Method and apparatus for electronic control of the output of an engine driven, chopped DC welding power supply, driven by an AC generator

摘要

An engine driven welding power supply is disclosed. The power supply produces a welding output having a plurality of volt-ampere curves. Each of the curves is associated with a selected current output and includes a slope over usable welding range. The magnitude of the slope over the usable welding range is dependent on the selected current output, particularly at a middle range of output currents. The power supply includes a AC generator that provides an AC signal. A rectifier rectifies the AC signals and provides a DC output. The DC output is provided to an output inductor that provides a smooth DC output. The V-A curves are produced by phase control in the rectifier.