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Non-interrupting power supplies for loads of less than 500 watts

  • US 4,384,214 A
  • Filed: 08/03/1981
  • Issued: 05/17/1983
  • Est. Priority Date: 08/03/1981
  • Status: Expired due to Fees
First Claim
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1. A non-interrupting power supply for supplying DC power to a load, comprising:

  • input means adapted to be coupled to a source of AC power;

    first means coupled to said input means and to said load for converting said AC power to DC power for utilization by said load;

    second means for storing DC power;

    charging means coupled to said input means and to said second means for charging said second means;

    third means coupled to said input means and to said second means for sensing the failure of said source of AC power;

    fourth means coupled to said first means and to said second means and responsive to said third means for supplying power from said second means to said first means upon failure of said source of AC power; and

    regulating means coupled to said load and said first means for regulating the DC-power produced by said first means in accordance with load requirement, said regulating means comprises;

    a voltage regulator coupled to the output of said first means;

    a variable pulse width circuit having an output coupled to said first means; and

    an optoelectronic isolator for coupling the output of said voltage regulator to an input of said variable pulse width circuit.

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