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Universal input/output power supply with inherent near unity power factor

  • US 6,343,021 B1
  • Filed: 05/09/2000
  • Issued: 01/29/2002
  • Est. Priority Date: 05/09/2000
  • Status: Expired due to Fees
First Claim
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1. A power converter for receiving a DC input and providing a variable AC output, said converter comprising:

  • an input terminal and a return terminal for receiving said DC input;

    an input inductor, an input capacitor, and a transformer having a primary and a secondary winding, said input inductor, said input capacitor, and said primary winding connected in series between said input terminal and said return terminal;

    a controllable switch having a control terminal for receiving a control signal to open and close said switch at predetermined intervals, said switch connecting the junction of said input inductor and input capacitor with said return terminal; and

    an output circuit comprising an output inductor, an output capacitor, and said secondary winding connected in series;

    such that when said controllable switch is opened and closed at said predetermined intervals said capacitor is alternatively charged by said DC input and then discharged across said primary winding, which transfers the energy of said discharge to said secondary winding, and the inductors, capacitors, and transformer having parameters selected whereby a waveform of predetermined wave shape, amplitude, frequency, phase, and damping factor is created in said output circuit.

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