Patent · US Active

Position insensitive wireless charging

US8963488B2 · kind B2 · utility

95Cited by

220References

20Claims

0Family size

Assignee

WiTricity Corporation · US

Inventors

Andrew J. Campanella · Waltham, US
Katherine L. Hall · Westford, US
Aristeidis Karalis · Boston, US
Morris P. Kesler · Bedford, US
Konrad J. Kulikowski · North Andover, US
Andre B. Kurs · Sharon, US
Qiang Li · Irvine, US
Marin Soljacic · Belmont, US
Eric R. Giler · Wellesley, US
David A. Schatz · Needham, US

Key dates

Filing date	Oct 6, 2011
Grant date	Feb 24, 2015
Priority date	—
Expiry date	Jan 23, 2033

Classification

Technology area (CPC H)Electricity
CPC primaryH02J7/00045
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

A wireless charging pad includes a capacitively-loaded conducting loop source resonator, with a characteristic size, L1, connected to a switching amplifier and configured to generate an oscillating magnetic field, wherein the conducting loop comprises multiple turns circumscribing an area, the conducting loop does not extend into the center of the circumscribed area, the source resonator delivers useful power to at least one device resonator with a characteristic size, L2, and where L1 is larger than L2.

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