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Current sensor for universal application

  • US 4,791,361 A
  • Filed: 06/11/1987
  • Issued: 12/13/1988
  • Est. Priority Date: 06/11/1987
  • Status: Expired due to Fees
First Claim
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1. A current sensor quantitatively measuring current flow in an electrical conductor of any cross-sectional shape comprising:

  • an insulating housing;

    a magnetic flux concentrator in said housing comprising a pair of magnetic pole pieces having respective flat surfaces in spaced parallel facing relation to provide a magnetic sensing region therebetween and a magnetic shunt connected to said pole pieces across said region, said pole pieces further comprising magnetic terminal means accessible exteriorly of said housing;

    magnetizable means having a selectively predetermined configuration surrouding the cross-sectional shape of said electrical conductor in spaced relation thereto, said magnetizable means being removably attached to said magnetic terminal means establishing a magnetizable loop including said flux concentrator around said conductor providing a linear magnetic field in said magnetic sensing region having an intensity proportional to current flow in said conductor, said magnetizable means being oriented to locate said shunt between said conductor and said magnetic sensing region;

    means in said housing including transducer means disposed between said flat surfaces responsive to said magnetic field intensity in said magnetic sensing region providing electric signals in proportion to said magnetic field intensity; and

    electric wiring terminal means for each electric signal externally disposed on said housing, said electric wiring terminal means connected to said means responsive to magnetic field intensity receiving said electric signals thereat.

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