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Power coupling device

  • US 20060022785A1
  • Filed: 02/26/2004
  • Published: 02/02/2006
  • Est. Priority Date: 02/26/2003
  • Status: Active Grant
First Claim
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1. A power coupling device for coupling power to a rotating member, said power coupling device comprising:

  • a. a primary magnetic core defining a first recess;

    b. a secondary magnetic core defining a second recess and disposed adjacent said primary magnetic core;

    wherein said primary and secondary cores are arranged so as to form an air gap therebetween, said air gap permitting relative rotation of said cores about a common axis of rotation; and

    c. a primary conductive winding disposed within said first recess and a secondary conductive winding disposed within said second recess;

    wherein at least one of said primary and said secondary windings comprises a fractional turn winding.

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