Dc to dc converters

  • US 20040246089A1
  • Filed: 03/02/2004
  • Published: 12/09/2004
  • Est. Priority Date: 08/03/2001
  • Status: Abandoned Application
First Claim
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1. A continuous DC-to-DC converter comprising:

  • a transformer having two outer legs and a middle leg, a primary side comprising a first primary inductor wound on one outer transformer leg and connected between one side of the DC input and a first capacitor, a second primary inductor wound on the other outer transformer leg and connected between one side of the DC input and a second capacitor, first switching means comprising a change-over switch connecting the other side of the DC input to the two sides of the first capacitor, second switching means comprising a change-over switch connecting the other side of the DC input to the two sides of the second capacitor, and a common inductor wound on the middle transformer leg and connected to the first and second capacitors on the sides opposite the first and second inductors respectively, and a secondary side comprising a bridge circuit having two adjacent legs forming secondary inductors wound on the respective outer transformer legs, two adjacent legs including respective rectifying means, and a cross path forming a common secondary winding on the middle transformer leg, the first and second primary inductors being wound on the respec-tive legs of the transformer in opposite senses, such that corre-sponding currents through them induce magnetic fluxes in opposite directions through the middle transformer leg, characterized in that the cross-sectional area of the middle leg is less than that of each of the two outer legs.

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