×

Adaptive inductive power supply with communication

  • US 8,346,166 B2
  • Filed: 04/01/2011
  • Issued: 01/01/2013
  • Est. Priority Date: 02/04/2003
  • Status: Expired due to Term
First Claim
Patent Images

1. A contactless power supply for inductively providing power to a remote device comprising:

  • a resonant circuit having at least one of a variable capacitor with a variable capacitance and a variable inductor with a variable inductance, said resonant circuit having a variable resonant frequency that varies as a function of said at least one of said variable capacitor and said variable inductor, said resonant circuit having a primary for transferring power to the remote device;

    circuitry for providing power at an operating frequency, rail voltage, and duty cycle;

    a receiver for receiving information from said remote device;

    a controller electrically coupled to said receiver and said circuitry, wherein said controller is programmed to;

    (1) vary said variable resonant frequency of said resonant circuit by at least one of (i) varying said capacitance of said variable capacitor of said resonant circuit; and

    (ii) varying said variable inductance of said variable inductor of said resonant circuit; and

    (2) vary at least one of said operating frequency, said duty cycle, and said rail voltage.

View all claims
  • 1 Assignment
Timeline View
Assignment View
    ×
    ×