Patent · US Active

Wireless power transmitter tuning

US9094055B2 · kind B2 · utility

4Cited by

2References

34Claims

0Family size

Assignee

QUALCOMM Incorporated · US

Inventors

Zhen Ning Low · Village of La Jolla, US
Charles E. Wheatley, III · Del Mar, US
Sreenivas Kasturi · Hillsboro, US

Key dates

Filing date	Feb 17, 2012
Grant date	Jul 28, 2015
Priority date	—
Expiry date	Mar 22, 2034

Classification

Technology area (CPC H)Electricity
CPC primaryH02J50/80
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

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.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.