DEVICE TO DEVICE SIGNALING IN WIRELESS ENERGY TRANSFER SYSTEMS
First Claim
Patent Images
1. A method for in-band communication in a wireless energy transfer system comprising a source and a receiving device, the method comprising:
- receiving an energy transfer signal from the source;
identifying characteristics of the modulations on the energy transfer signal;
determining a coupling factor between the source and the device based on the characteristics;
determining modulation levels for transmitting in-band communication based on the determined coupling factor; and
modulating an impedance of the device according to the modulation levels.
1 Assignment
0 Petitions
Accused Products
Abstract
Described herein are improved configurations for wireless energy transfer. System elements of a wireless energy transfer system may pair in-band and out-of-band communication channels by exchanging related information. Energy transfer signals may be modulated according to defined waveforms. Waveform characteristics may be transmitted using an out-of-band communication channel. A system element that receives both the waveform and the waveform characteristics may verify that they correspond to the same system element by verifying that the waveform matches the waveform characteristics.
25 Citations
19 Claims
-
1. A method for in-band communication in a wireless energy transfer system comprising a source and a receiving device, the method comprising:
-
receiving an energy transfer signal from the source; identifying characteristics of the modulations on the energy transfer signal; determining a coupling factor between the source and the device based on the characteristics; determining modulation levels for transmitting in-band communication based on the determined coupling factor; and modulating an impedance of the device according to the modulation levels. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
-
-
10. A device with an in-band communication channel in a wireless energy transfer system, the device comprising:
-
a device resonator for receiving energy from a source; a sensing circuit configured to detect modulations on the device resonator, to identify characteristics of the modulations, and to determine a coupling factor between the source and the device; and a modulating circuit configured to modulate an impedance of the device resonator, wherein a magnitude of the impedance modulation is based on the determined coupling factor. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18)
-
-
19. A wireless power transfer system, the system comprising:
-
a power source comprising a source resonator, wherein the power source is configured to transfer power wirelessly; and a device configured to receive power from the power source, and comprising; a device resonator configured to couple at a resonant frequency to the source resonator during power transfer; a sensing circuit configured to determine a coupling factor between the source resonator and the device resonator; and a modulating circuit configured to modulate an impedance of the device resonator based on a value of the coupling factor to transmit information to the power source, wherein the power source is configured to detect the modulated impedance of the device resonator at the resonant frequency to receive the information from the device resonator.
-
Specification