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Inverter power supply

  • US 4,215,392 A
  • Filed: 12/19/1978
  • Issued: 07/29/1980
  • Est. Priority Date: 12/19/1978
  • Status: Expired due to Term
First Claim
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1. A circuit comprising:

  • a transforming means having a primary and a secondary with said secondary having a first winding and at least one second winding, and also having means coupling said second winding to supply a D.C. output voltage to a load;

    D.C. input means;

    means operatively coupled to said D.C. input means for switching a current through said primary in response to first and second signals applied thereto to produce an alternating voltage across said first winding and said second winding;

    control means having an input thereto which is operatively coupled to said D.C. output voltage and also generating said first and second signals to maintain a constant voltage at said load;

    rectifier means operatively coupled to said first winding to provide power to said control means; and

    start-up means operatively coupled to said D.C. input means to provide start-up power for said control means until said rectifier means supplies said power thereto;

    said start-up means including a resistor and a control element, said resistor being of a size which enables it to act as a fuse in the event that said control element is biased into conduction for a predetermined amount of time.

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