Wireless energy transfer for implantable devices

  • US 9,577,436 B2
  • Filed: 06/06/2011
  • Issued: 02/21/2017
  • Est. Priority Date: 09/27/2008
  • Status: Active Grant
  • ×
    • Pin Icon | RPX Insight
    • Pin
First Claim
Patent Images

1. A wireless energy transfer system for powering devices implanted in a patient, the system comprising:

  • a high-Q source resonator having a first resonant frequency, the source resonator being external to the patient, coupled to a power source, and configured to generate oscillating magnetic fields at substantially the first resonant frequency;

    a high-Q device resonator having a second resonant frequency, the device resonator coupled to an implantable device requiring a supply power, the device resonator being internal to the patient, and configured to capture the oscillating magnetic fields generated by the source resonator; and

    a repeater resonator;

    wherein the repeater resonator is positioned to improve the energy transfer between the source resonator and the device resonator;

    wherein the system is designed to reduce heat dissipation in the device resonator and distribute the heat dissipation to the repeater resonator by tuning the second resonant frequency changing an effective impedance of the device resonator, or both, to reduce oscillating current in the device resonator and to reduce current to the implantable device;

    and wherein the repeater resonator has a cooling system for its heat dissipation.

View all claims
  • 2 Assignments