×

System and method of providing communications in a wireless power transfer system

  • US 10,277,279 B2
  • Filed: 06/14/2016
  • Issued: 04/30/2019
  • Est. Priority Date: 02/07/2011
  • Status: Active Grant
First Claim
Patent Images

1. A method of communicating data between a remote device and an inductive power supply using keyed modulation, said method comprising:

  • receiving inductive power via a variable frequency power transmission signal from the inductive power supply;

    encoding a data stream of bits into a communication signal;

    generating a modulation signal based on the communication signal and one or more modulation clock signals, wherein each bit of the data stream is represented by a plurality of modulations in the modulation signal;

    modulating the variable frequency power transmission signal according to the modulation signal by toggling a load of a communication transmitter; and

    varying at least one of the one or more modulation clock signals based on variations in a frequency of the variable frequency power transmission signal, wherein the variable frequency power transmission signal is capable of varying in response to a change in at least one operating parameter of the inductive power supply, whereby the at least one of the one or more modulation clock signals is varied based on the change in the at least one operating parameter of the inductive power supply, and wherein the data stream from the variable frequency power transmission signal is decoded by time slicing the variable frequency power transmission signal and identifying DC offsets among time slices.

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