Wireless power transmitter tuning
AssigneeQUALCOMM Incorporated
InventorsZhen Ning Low, Charles Edward Wheatley, III, Sreenivas Kasturi
Life of this patent
Estimating the term…
Abstract
This disclosure provides systems, methods and apparatus for tuning a wireless power transmitter. In one aspect an apparatus configured to wirelessly provide power to a load is provided. The apparatus includes a transmit circuit including a transmit coil. The transmit circuit is configured to wirelessly provide power to the load. The transmit coil is configured to resonate at a resonant frequency. The transmit circuit has a reactance. The apparatus further includes a detection circuit configured to detect a change in the resonant frequency while providing power to the load. The apparatus further includes a tuning circuit configured to adjust the reactance based on the change.
Claims34
An apparatus configured to wirelessly provide power to a load, the apparatus comprising:
- a transmit circuit comprising a transmit coil, the transmit circuit being configured to wirelessly provide power to the load, the transmit circuit being further configured to resonate at a resonant frequency, the transmit circuit having a reactance;
- a detection circuit configured to detect a change in the resonant frequency while providing power to the load;
- and
- a tuning circuit configured to adjust the reactance based on the change.
A method of tuning a wireless power transmitter, the method comprising:
- detecting a change in a resonant frequency of a transmit circuit comprising a transmit coil of the wireless power transmitter while wirelessly providing power to a first device;
- and
- adjusting a tuning reactance of the transmit circuit based on the detection while wirelessly providing power to the first device.
An apparatus configured to wirelessly provide power to a load, the apparatus comprising:
- means for wirelessly transmitting power to the load, the means for wirelessly transmitting power being configured to resonate at a resonant frequency, the means for wirelessly transmitting power having a reactance;
- means for detecting a change in the resonant frequency while providing power to the load;
- and
- means for tuning configured to adjust the reactance based on the change.
Dependencies are inferred from the claim text.