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Method and apparatus for controlling weld states of a MIG welding process

  • US 9,308,597 B2
  • Filed: 12/09/2005
  • Issued: 04/12/2016
  • Est. Priority Date: 09/23/2003
  • Status: Active Grant
First Claim
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1. A method of regulating a power source having an 115V inverter to condition raw power into a form usable by a MIG welding apparatus, the method comprising the step of:

  • determining a maximum allowable voltage error based on an output condition at a weld, wherein the maximum allowable voltage error comprises a clamped voltage error between a voltage feedback signal from the weld and a voltage command signal;

    determining an instantaneous command current based at least in part on the maximum allowable voltage error and based at least in part on inputs relating to operation of the MIG welding apparatus, wherein the inputs are different than the voltage command signal; and

    inputting a signal proportional to the instantaneous command current to a controller of the 115V inverter, the signal designed to regulate the controller to provide a control signal to regulate an output of the 115V inverter.

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