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Parallel resonant converter with zero voltage switching

  • US 4,992,919 A
  • Filed: 12/29/1989
  • Issued: 02/12/1991
  • Est. Priority Date: 12/29/1989
  • Status: Expired due to Fees
First Claim
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1. A parallel resonant converter, comprising:

  • (a) inductor impedance means and capacitor impedance means, one of said impedance means being variable over a pre-determined impedance;

    (b) a load electrically connected in series with said one impedance means to form a series circuit, said series circuit being connected electrically in parallel with the other impedance means, said load being characterized by an output voltage;

    (c) switched source of power means, comprising at least one switch operated by a driving circuit, for switching voltage through said series circuit and said other impedance means;

    (d) control circuit means, operating in response to said output voltage, for varying said one impedance means to maintain said output voltage within a pre-determined voltage range; and

    (e) feedback means, using a feedback voltage derived across said other impedance means, for supplying a control signal to said driving circuit to operate said switch under zero voltage switching conditions and continuous current flow through said load.

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