Nonlinear system identification for optimization of wireless power transfer
First Claim
1. A method of finding an operating frequency 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 a signal produced within the WPTS in response to the applied pseudo-random signal;
processing the recorded signal to generate an output signal, wherein the output signal identifies the operating frequency for the drive signal and wherein processing the recorded signal comprises applying a nonlinear filter function; and
using the operating frequency to generate the drive signal to the transmit coil to perform a wireless power transfer.
2 Assignments
0 Petitions
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.
30 Citations
6 Claims
-
1. A method of finding an operating frequency 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 a signal produced within the WPTS in response to the applied pseudo-random signal; processing the recorded signal to generate an output signal, wherein the output signal identifies the operating frequency for the drive signal and wherein processing the recorded signal comprises applying a nonlinear filter function; and using the operating frequency to generate the drive signal to the transmit coil to perform a wireless power transfer. - View Dependent Claims (2, 3)
-
-
4. A wireless power transfer system (WPTS) comprising:
-
a transmit coil; a power transmitter circuit connected to the transmit coil; a sensor circuit connected to the transmit coil; and 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 a signal produced within the WPTS in response to the applied pseudo-random signal; and process the recorded signal to generate an output signal, wherein the output signal identifies the operating frequency to be used for the drive signal and wherein processing the recorded signal comprises applying a nonlinear filter function. - View Dependent Claims (5, 6)
-
Specification