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Self-regulating transcutaneous energy transfer

  • US 9,782,600 B2
  • Filed: 08/20/2009
  • Issued: 10/10/2017
  • Est. Priority Date: 08/20/2009
  • Status: Active Grant
First Claim
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1. An implantable device for receiving electrical power from an external charger unit, the external charger unit producing an oscillating current in a primary coil at a driving frequency, the oscillating current producing an oscillating magnetic field proximate the external charger unit, the implantable device comprising:

  • a secondary coil for receiving the oscillating magnetic field and producing an alternating current at the driving frequency, the amplitude of the alternating current depending in part on the driving frequency, on an amplitude of the oscillating current in the primary coil, and on the relative orientations of the primary and secondary coils;

    a rectifier for receiving the alternating current from the secondary coil and producing a single-sided current;

    a regulator for receiving the single-sided current from the rectifier and producing an essentially direct current at a regulated voltage;

    a rechargeable battery charged by the essentially direct current; and

    a control loop for temporarily short-circuiting both ends of the secondary coil to ground.

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