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CURRENT SENSOR

  • US 20130027021A1
  • Filed: 07/28/2011
  • Published: 01/31/2013
  • Est. Priority Date: 07/28/2011
  • Status: Abandoned Application
First Claim
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1. A current sensor for measuring DC current in a primary conductor also carrying AC current, the current sensor comprising:

  • a ferromagnetic core through which the primary conductor may extend, the core having an air gap formed therein;

    a magnetic flux sensor disposed in the air gap;

    a secondary winding mounted to the core, the secondary winding have an impedance connected therein, the impedance having a value of substantially zero at one or more frequencies of the AC current; and

    wherein the air gap has a width less than twice the thickness of the magnetic flux sensor.

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