Systems and methods providing controlled AC arc welding processes
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United States of America Patent
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Sep 1, 2015
Grant Date -
Mar 27, 2014
app pub date -
Sep 24, 2012
filing date -
Sep 24, 2012
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Abstract
Systems and methods for providing controlled AC arc welding processes. In arc welding power source embodiments, configurations of main and auxiliary bridge circuits allow for the directional switching of the output welding current through the welding output circuit path and selectively provide one or more high impedance paths to rapidly decay the arc current. The high impedance path aids in the low spatter transfer of molten metal balls from a consumable electrode to a workpiece and further aids in the maintaining or the re-establishing of an arc between the consumable electrode and the workpiece when a molten metal ball is transferred.
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