| 摘要 |
PURPOSE: An output choke for a direct current welding machine and a method for using the same are provided to resolve weight and welding inconsistencies by a larger choke having a fixed style air gap or a smaller choke having a step style air gap and control a wide range of welding current without vibration or any further larger output choke. CONSTITUTION: An output choke for a direct current welding machine includes a core(52) of high permeability having an inductance for controlling an air gap formed by first and second pole pieces ending on first and second surfaces facing to each other, wherein the first and second surfaces(54,56) respectively have two separated edges(54a,54b,56a,56b) in an intermediate portion and a predetermined section shape is formed on the air gap by convergence from the intermediate portion to the respective edges, the section is formed in the shape of symmetry, diamond, oval, or curve, and the intermediate portion is more adjacent to one of the edges.
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