Apparatus, system, and method for back-channel communication in an inductive wireless power transfer system
First Claim
1. An inductive wireless power transfer device, comprising:
- a transmitter, comprising;
a transmit coil configured to generate a wireless power signal to a coupling region in response to an input voltage, the transmitter including an inverter configured to generate a time varying current through the transmit coil responsive to a DC signal as the input voltage, the inverter including a switch network; and
a modulator configured to modulate the wireless power signal and encode data with the wireless power signal to establish a back-channel communication link from the transmitter to a receiver,wherein the modulator is configured to adjust a control characteristic of the inverter to modulate the wireless power signal and encode data with the wireless power signal, the control characteristic being a combination of a switching frequency of the switch network and a duty cycle of switches of the switch network.
3 Assignments
0 Petitions
Accused Products
Abstract
An inductive wireless power transfer device comprises a transmitter that comprises a transmit coil configured to generate a wireless power signal to a coupling region in response to an input voltage, and a modulator configured to modulate the wireless power signal and encode data with the wireless power signal to establish a back-channel communication link from the transmitter to a receiver. An inductive wireless power receiving device comprises a receiver that comprises a receive coil configured to generate a time varying signal in response to receiving a modulated wireless power signal from a transmitter in a coupling region, and a demodulator configured to demodulate the modulated wireless power signal from an established back-channel communication link from the transmitter to a receiver. Related inductive wireless power transfer systems and methods for back-channel communication from the transmitter to the receiver of an inductive wireless power transfer system are disclosed.
-
Citations
12 Claims
-
1. An inductive wireless power transfer device, comprising:
- a transmitter, comprising;
a transmit coil configured to generate a wireless power signal to a coupling region in response to an input voltage, the transmitter including an inverter configured to generate a time varying current through the transmit coil responsive to a DC signal as the input voltage, the inverter including a switch network; and a modulator configured to modulate the wireless power signal and encode data with the wireless power signal to establish a back-channel communication link from the transmitter to a receiver, wherein the modulator is configured to adjust a control characteristic of the inverter to modulate the wireless power signal and encode data with the wireless power signal, the control characteristic being a combination of a switching frequency of the switch network and a duty cycle of switches of the switch network. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
- a transmitter, comprising;
-
9. A method for communicating between a transmitter to a receiver in an inductive wireless power transfer system, the method comprising:
-
generating a wireless power signal through a transmit coil of a transmitter to a receive coil of a receiver, the transmitter including an inverter with a switching network that receive a DC signal; and modulating the wireless power signal on the transmitter side for communicating encoded data with the wireless power signal being transmitted from the transmitter to the receiver, wherein modulating the wireless power includes adjusting a combination of a switching frequency of the switching network and a duty cycle of switches of the switch network to encode data with the wireless power signal. - View Dependent Claims (10, 11, 12)
-
Specification