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Controlled inductance device and method

  • US 7,109,837 B2
  • Filed: 09/17/2003
  • Issued: 09/19/2006
  • Est. Priority Date: 03/18/2003
  • Status: Expired due to Fees
First Claim
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1. An inductive device, comprising:

  • a magnetically permeable core having a gap formed therein;

    at least one winding disposed proximate to said core;

    a U-shaped magnetically permeable element disposed at least partially within said gap, said U-shaped element being disposed so that a radius of said U-shape is oriented towards the center of said magnetically permeable core; and

    an insulator disposed substantially inside of said U-shaped magnetically permeable element;

    wherein said permeable element, core, and insulator cooperate to provide a desired inductance characteristic as a function of current.

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