Inductive coupler for electric vehicle charger

  • US 5,703,461 A
  • Filed: 06/27/1996
  • Issued: 12/30/1997
  • Est. Priority Date: 06/28/1995
  • Status: Expired due to Fees
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First Claim
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1. An inductive coupler in a battery charging system for an electric vehicle comprising a primary device having a primary coil for connection to a power source, and a secondary device for mounting on said vehicle and having a secondary coil for coupling to a battery in said vehicle, said primary and secondary devices being assembleable with one of said primary and secondary coils being insertable within an open space defined by the other of said primary and secondary coils for coupling said coils electromagnetically to induce an electromotive force in said secondary coil upon establishing a current in said primary coil in the assembled condition of the coupler, said other of said primary and secondary coils being formed and sized larger than said one of said primary and secondary coils at least along a predetermined axis to provide a first clearance at least in the direction of said predetermined axis between said coils when assembled, said first clearance in the direction of said predetermined axis being greater than any clearance in the direction orthogonal to said predetermined axis, and means for mounting said primary device adjacent a space for parking said vehicle with means for moving said primary device at least horizontally into a selectable position for engaging and assuming said assembled condition with said secondary device.

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