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Transformer for a flyback type converter

  • US 4,887,061 A
  • Filed: 12/30/1988
  • Issued: 12/12/1989
  • Est. Priority Date: 01/18/1988
  • Status: Expired due to Fees
First Claim
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1. A transformer for a flyback converter type switching power source comprising;

  • a ferrite core (10,11) having a pair of side legs (10a, 11a) and a center leg (10b, 11b) which is shorter than said side legs, so that a gap G is provided on the center leg, and arms (10c, 11c) connecting said side legs with said center leg,a bobbin (15) having a cylindrical hollow center body (15a) and a pair of flanges (15b), having windings on said hollow center body, assembled with said ferrite core so that said center leg is inserted into the hollow center body of the bobbin,said gap G being located at end of said center leg (10a) under one of the extreme ends of said hollow center body of the bobbin (15), andno coil means (16a, 16b) being provided for allowing no winding in predetermined axial and radial lengths from said gap.

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