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Method and apparatus for detecting shorted rectifying control elements of an engine driven power source for welding-type system

  • US 6,963,216 B2
  • Filed: 06/13/2003
  • Issued: 11/08/2005
  • Est. Priority Date: 06/13/2003
  • Status: Active Grant
First Claim
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1. A shorted rectifying control element detection device comprising:

  • an input stage connected to an engine driven generator configured to supply power for a welding-type process;

    a filtering stage to bandpass current signals acquired by the input stage from the engine driven generator; and

    an output stage connected to the filtering stage and configured to at least indicate a fault condition if fundamental frequency components present in the current signals exceed a threshold.

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