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Nonlinear system identification for optimization of wireless power transfer

  • US 9,404,950 B2
  • Filed: 04/18/2014
  • Issued: 08/02/2016
  • Est. Priority Date: 12/18/2012
  • Status: Active Grant
First Claim
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1. A method of identifying a waveform for a drive signal to a transmit coil in a wireless power transfer system (WPTS), said method comprising:

  • applying a pseudo-random signal to the transmit coil when the transmit coil is wirelessly connected to a receiver coil;

    while the pseudo-random signal is being applied to the transmit coil, recording one or more signals produced within the WPTS in response to the applied pseudo-random signal;

    by using the one or more recorded signals, generating a dynamic system model of electrical characteristics of some aspect of the WPTS;

    conducting a search for an optimized waveform for the drive signal for wirelessly transferring energy from the transmit coil to the receiver coil, wherein conducting the search comprises repeatedly using the generated dynamic system model to simulate a response to the drive signal while varying the waveform of the drive signal until the optimized waveform is found, andtransferring power to the receiver coil using the optimized waveform for the drive signal.

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