SYSTEMS AND METHODS PROVIDING LOW CURRENT REGULATION FOR AC ARC WELDING PROCESSES

摘要

Systems and methods providing low current regulation for AC arc welding processes to regulate arc welding performance. In arc welding power source (100) embodiments, configurations of bridge (160) and arc regulation circuits (170) allow for the directional switching of the welding output current through the welding output circuit path and induce a voltage between the electrode (E) and the workpiece (W) of the welding output circuit (170) path that is sufficient to re-ignite the arc during polarity transition of the output current. The arc regulation circuit provides a high inductance level for storing energy, in both polarities, which induces the voltage level for re-igniting the arc during the zero crossing of the output current and provides low end stabilization of arc current.