Switch mode power converter having multiple inductor windings equipped with snubber circuits
First Claim
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1. A switch mode power converter circuit for powering a load from a source of DC voltage having first and second terminals, comprising:
- inductor means having a primary winding with first and second terminals, a center tap terminal that is connected to a load, and a first polarity between said first and said second terminals;
first switch means, connected between a first terminal of said source of DC voltage and said first terminal of said inductor means;
first diode means having an anode terminal and a cathode terminal, said cathode terminal being connected to said first terminal of said source of DC voltage and said anode terminal being connected to said first terminal of said inductor means;
second switch means, connected between a second terminal of said source of DC voltage and said second terminal of said inductor means;
second diode means having an anode terminal and a cathode terminal, said anode terminal being connected to said second terminal of said source of DC voltage and said cathode terminal being connected to said second terminal of said inductor means;
switching control means for switching the first and second switch means to conduct alternatively between said first and second terminals of said source of DC voltage at a predetermined high frequency;
wherein said inductor means includes a secondary winding with first and second terminals and a second polarity between said first and said second terminals that is opposite said first polarity of said primary winding of said inductor means and said secondary winding is connected between said first and second terminals of said source of DC voltage, respectively.
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Abstract
The present switch mode power converter having multiple inductor windings equipped with snubber circuits uses a small value inductor that has at least one properly oriented secondary winding, and ultra fast diodes interconnect the primary and the secondary windings of this inductor for providing protection against momentary short circuits, reductions of dv/dt, and switching losses.
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Citations
24 Claims
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1. A switch mode power converter circuit for powering a load from a source of DC voltage having first and second terminals, comprising:
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inductor means having a primary winding with first and second terminals, a center tap terminal that is connected to a load, and a first polarity between said first and said second terminals; first switch means, connected between a first terminal of said source of DC voltage and said first terminal of said inductor means; first diode means having an anode terminal and a cathode terminal, said cathode terminal being connected to said first terminal of said source of DC voltage and said anode terminal being connected to said first terminal of said inductor means; second switch means, connected between a second terminal of said source of DC voltage and said second terminal of said inductor means; second diode means having an anode terminal and a cathode terminal, said anode terminal being connected to said second terminal of said source of DC voltage and said cathode terminal being connected to said second terminal of said inductor means; switching control means for switching the first and second switch means to conduct alternatively between said first and second terminals of said source of DC voltage at a predetermined high frequency; wherein said inductor means includes a secondary winding with first and second terminals and a second polarity between said first and said second terminals that is opposite said first polarity of said primary winding of said inductor means and said secondary winding is connected between said first and second terminals of said source of DC voltage, respectively. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24)
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Specification