Dynamic tuning in wireless energy transfer systems

  • US 10,651,688 B2
  • Filed: 11/21/2018
  • Issued: 05/12/2020
  • Est. Priority Date: 10/22/2015
  • Status: Active Grant
  • ×
    • Pin Icon | RPX Insight
    • Pin
First Claim
Patent Images

1. A variable capacitance device comprising:

  • a first capacitor comprising a first-capacitor first terminal and a first-capacitor second terminal, the first-capacitor first terminal electrically connected to a ground;

    a first switch comprising a first-switch first terminal, a first-switch second terminal, and a first-switch control terminal, the first-switch first terminal electrically connected to the first-capacitor first terminal, and the first-switch second terminal electrically connected to the first-capacitor second terminal;

    a second capacitor comprising a second-capacitor first terminal and a second-capacitor second terminal, the second-capacitor first terminal electrically connected to the ground;

    a second switch comprising a second-switch first terminal, a second-switch second terminal, and a second-switch a control terminal, the second-switch first terminal electrically connected to the second-capacitor first terminal, and the second-switch second terminal electrically connected to the second-capacitor second terminal; and

    control circuitry coupled with the first-switch control terminal and with the second-switch control terminal,wherein the control circuitry is configured to adjust respective capacitances of the first and second capacitors by;

    in response to detecting a zero voltage condition across the first switch, causing a first control signal to be applied to the first-switch control terminal for a duration of time, wherein the first control signal causes the first switch to close; and

    in response to detecting a zero voltage condition across the second switch, causing a second control signal to be applied to the second-switch control terminal for the duration of time, wherein the second control signal causes the second switch to close.

View all claims
  • 1 Assignment