Nonlinear system identification for optimization of wireless power transfer
AssigneeNucleus Scientific, Inc.
InventorsSerge R. Lafontaine, Ian W. Hunter
Life of this patent
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Abstract
A method of detecting whether a receiver coil is near a transmit coil in a wireless power transfer system (WPTS), the method involving: applying a pseudo-random signal to the transmit 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 for some aspect of the WPTS; and using the generated dynamic system model in combination with stored training data to determine whether an object having characteristics distinguishing the object as a receiver coil is near the transmit coil.
Claims4
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;
- 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 for some aspect of the WPTS;
- and
- conducting a search for an optimum waveform for the drive signal, 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 optimum waveform is found.
A wireless power transfer system comprising:
- a transmit coil;
- a power transmitter circuit connected to the transmit coil;
- a sensor circuit connected to the transmit coil;
- a controller for controlling the power transmitter circuit and the sensor circuit, wherein said controller includes a memory for storing a nonlinear filter function and a processor system programmed to:
- cause the power transmitter to apply a pseudo-random signal to the transmit coil;
- while the pseudo-random signal is being applied to the transmit coil, cause the sensor circuit to record one or more signals produced within the WPTS in response to the applied pseudo-random signal;
- by using the one or more recorded signals, generate a dynamic system model for some aspect of the WPTS;
- and
- conduct a search for an optimum waveform for the drive signal by 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 optimum waveform is found.
Dependencies are inferred from the claim text.