Wireless energy transfer for implantable devices

  • US 10,084,348 B2
  • Filed: 10/31/2016
  • Issued: 09/25/2018
  • Est. Priority Date: 09/27/2008
  • Status: Active Grant
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First Claim
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1. A wireless energy transfer apparatus for an implantable medical device, the apparatus comprising:

  • a device resonator configured to supply power for a load of the implantable medical device by receiving wirelessly transferred power from a source resonator coupled with a power source;

    a temperature sensor positioned to measure a component of the apparatus;

    a tunable component coupled to the device resonator to adjust a resonant frequency of the device resonator, an effective impedance the device resonator, or both; and

    control circuitry coupled with the temperature sensor and the tunable component;

    wherein the control circuitry is configured to, in response to detecting a temperature condition using the temperature sensor positioned to measure the temperature of the component of the apparatus,(i) tune the tunable component to adjust the resonant frequency of the device resonator, the effective impedance of the device resonator, or both, and(ii) signal the source resonator regarding the temperature condition to cause an adjustment of a resonant frequency of the source resonator, a power output of the source resonator, or both.

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