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High frequency switching battery charger

  • US 4,584,514 A
  • Filed: 03/18/1985
  • Issued: 04/22/1986
  • Est. Priority Date: 05/20/1983
  • Status: Expired due to Fees
First Claim
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1. A power supply for charging a storage battery, comprising:

  • power supply means adapted to be connected to a source of electrical energy for supply power;

    rectifying means operatively connected to said power supply means for rectifying the supplied power;

    output transformer means operatively connected to said rectifying means and to said battery for transforming said rectified power;

    power switching means operatively connected to said output transformer means for controlling a flow of current from said rectifying means through said output transformer means;

    pulse width modulator means operatively connected to said power switching means for controlling said power switching means, with a coupling transformer interposed between said pulse width modulator means and said power switching means;

    current sensing means for sensing said flow of current through said output transformer means;

    current limiting means responsive to said current sensing means and operatively connected to said pulse width modulator means for controlling said pulse width modulator means;

    charging voltage control means responsive to said current sensing means and operatively connected to said pulse width modulator means for controlling said pulse width modulator means;

    latch means for stopping said pulse width modulator means operatively connected to said pulse width modulator means;

    overcurrent sensing means responsive to said current sensing means operatively connected to said latch means for controlling said latch means;

    means for sensing the absense of said storage battery operatively connected to said latch means for controlling said latch means; and

    end-of-charge sensing means operatively connected to a terminal of said battery and to said latch means for controlling said latch means responsive to a predetermined voltage present at said terminal.

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