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Initiation of welding arc by restricting output

  • US 9,868,171 B2
  • Filed: 05/25/2012
  • Issued: 01/16/2018
  • Est. Priority Date: 05/26/2011
  • Status: Active Grant
First Claim
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1. A system for generating a weld during a start of a welding process, the system comprising:

  • a power circuit for generating a welding output power;

    a control circuit in communication with the power circuit, wherein the control circuit controls the welding output power generated by the power circuit;

    wherein the control circuit is configured to simultaneously limit a current and increase an inductance from an initial start of the welding process, wherein the welding output power is based on the current and the inductance;

    wherein the control circuit is further configured to provide a normal welding parameter after limiting the current and increasing the inductance when the control circuit determines that a welding energy output exceeds an energy output threshold; and

    wherein the control circuit determines a period of time for providing a current pulse, wherein the period of time is based on a run-in percentage of a wire feed speed and an output voltage, wherein a magnitude of the current pulse varies during the period of time.

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