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Method for estimating power of a power converter

  • US 9,300,206 B2
  • Filed: 11/15/2013
  • Issued: 03/29/2016
  • Est. Priority Date: 11/15/2013
  • Status: Active Grant
First Claim
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1. A controller, comprising:

  • an analog/digital converter configured to provide samples of a first rectified voltage waveform and a second rectified voltage waveform; and

    a processor configured to;

    estimate a first minimum value of said first rectified voltage waveform and a second minimum value of said second rectified voltage waveform in accordance with said samples;

    remove a first offset from said first rectified voltage waveform and a second offset from said second rectified voltage waveform to obtain a first unbiased rectified voltage waveform in accordance with said estimate of said first minimum value and a second unbiased rectified voltage waveform in accordance with said estimate of said second minimum value;

    apply a scaling factor to said second unbiased rectified voltage waveform to determine an unbiased rectified current waveform;

    multiply said first unbiased rectified voltage waveform and said unbiased rectified current waveform to determine an instantaneous power; and

    provide an average of said instantaneous power to determine an average power.

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