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Multi-turn z-foldable secondary winding for a low-profile, conductive film transformer

  • US 5,381,124 A
  • Filed: 12/29/1993
  • Issued: 01/10/1995
  • Est. Priority Date: 12/29/1993
  • Status: Expired due to Term
First Claim
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1. A transformer, comprising:

  • a primary winding comprising a primary conductive film disposed on a primary dielectric membrane, said primary conductive film being z-foldable to form a multi-layer primary winding;

    a secondary winding interleaved with said primary winding, said secondary winding comprising a secondary conductive film disposed on at least one surface of a secondary dielectric membrane and having two ends, said secondary conductive film having at least two portions arranged as mirror images of each other, each of said portions comprising a plurality of sections, each of said sections including an even number of apertures, each of said apertures corresponding to a separate respective magnetic pole such that there are at least two adjacent poles per section along at least one longitudinal pole axis, said conductive film being z-foldable to form a stack of winding layers with a single turn per two adjacent layers about each said magnetic pole, each of said layers comprising one of said sections, each single turn about each respective adjacent pole along said at least one longitudinal pole axis being connected in series to form a total number of secondary winding turns corresponding to the number of sections in each of said portions;

    an end terminal at each end of said secondary conductive film, said end terminals being connected together; and

    at least one additional terminal situated where said at least two portions meet, each corresponding additional terminal being connected together, each of said portions of said winding being connected in parallel to each other.

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