Nonlinear system identification for optimization of wireless power transfer
First Claim
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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Accused Products
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.
14 Citations
18 Claims
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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:
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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, and transferring power to the receiver coil using the optimized waveform for the drive signal. - View Dependent Claims (2, 3, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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4. A wireless power transfer system (WPTS) comprising:
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a transmit coil; a power transmitter circuit connected to the transmit coil for applying a drive signal 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 processor system programmed to; cause the power transmitter to apply 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, 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 of electrical characteristics of some aspect of the WPTS; conduct a search for an optimized waveform for the drive signal for wirelessly transferring energy from the transmit coil to the receiver coil 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 optimized waveform is found; and cause the power transmitter circuit to transmit power to the receiver coil by using the optimized waveform for the drive signal to the transmit coil. - View Dependent Claims (15, 16, 17, 18)
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Specification