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Controllable Universal Supply with Reactive Power Management

  • US 20110157942A1
  • Filed: 12/28/2010
  • Published: 06/30/2011
  • Est. Priority Date: 12/28/2009
  • Status: Active Grant
First Claim
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1. A method of managing reactive power, the method comprising:

  • rectifying a substantially sinusoidal source voltage waveform from a source to a rectified voltage node;

    providing a switch arranged to selectively couple the rectified voltage node to a load;

    determining a pulse width value for turning on the switch to deliver a desired average power to the load;

    receiving information about relative power drawn from the source during adjacent quadrants of the source voltage waveform;

    determining a switch turn on delay time to substantially equalize power between adjacent quadrants of the same polarity; and

    ,controlling the switch during at least two successive half cycles of the source voltage waveform according to the determined switch turn on delay time.

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