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DC/AC power converting apparatus including DC component remover

  • US 5,012,400 A
  • Filed: 09/21/1989
  • Issued: 04/30/1991
  • Est. Priority Date: 09/26/1988
  • Status: Expired due to Term
First Claim
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1. A power converting apparatus comprising:

  • means for supplying DC (direct current) power;

    DC-to-AC inverting means for inverting the DC power into AC (alternating current) power;

    transformer means for transforming the AC power to obtain desirable AC power;

    detecting means for detecting an output signal from the DC-to-AC inverting means to produce an output detection signal;

    calculating means for performing a control calculation for the DC-to-AC inverting means to enable the output detection signal to follow a reference signal by generating a first output instruction signal; and

    ,DC component removing means, located in a feedback loop between the calculating means and the DC-to-AC inverting means, for removing a DC component from the first output instruction signal to derive a second output instruction signal such that the inverting operation of the DC-to-AC inverting means is controlled based upon the second output instruction signal to prevent DC magnetization of the transformer means.

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