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Shielded power coupling device

  • US 9,368,272 B2
  • Filed: 12/02/2013
  • Issued: 06/14/2016
  • Est. Priority Date: 02/26/2003
  • Status: Active Grant
First Claim
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1. A shielded power coupling device configured to transfer electric power between a stator and a rotor, comprising:

  • an inductive field generating element configured to convert electric power to an inductive coupling field;

    an inductive field receiving element configured to convert the inductive coupling field to electric power;

    a primary and secondary core separated by a core airgap; and

    a shell defined by a plurality of segments, the plurality of segments coupled together to form a substantially circular structure, the shell comprising;

    a fringe field mitigation element comprising an electrically conductive wire that is inserted into the shell once the plurality of segments are coupled together, the fringe field mitigation element configured to mitigate magnetic flux generated by at least one of the inductive field generating element or the inductive field receiving element and escaping from at least one of the primary core or the secondary core near the core airgap, anda non-fringe field mitigation element.

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