Title:
WIRELESS POWER SUPPLY APPARATUS
Document Type and Number:
WIPO Patent Application WO/2012/144141
Kind Code:
A1
Abstract:
A resonance circuit includes a transmission coil and a resonance capacitor connected in series. A multi-tone power supply is capable of selecting desired frequency components from among multiple discrete frequency components, and outputs, to the resonance circuit, a multi-tone signal obtained by superimposing sine wave signals of the respective frequency components thus selected. In a measurement mode, a frequency control circuit sets all the frequency components for the multi-tone power supply, and selects at least one frequency component at which the electric power transmission efficiency is high in the state in which a multi-tone signal is generated by superimposing the sine wave signals of all the frequencies. In a power supply mode, the aforementioned at least one frequency component thus selected in the measurement mode is set for the multi-tone power supply.
Inventors:
ENDO YUKI (JP)
FURUKAWA YASUO (JP)
FURUKAWA YASUO (JP)
Application Number:
PCT/JP2012/002348
Publication Date:
October 26, 2012
Filing Date:
April 04, 2012
Export Citation:
Assignee:
ADVANTEST CORP (JP)
ENDO YUKI (JP)
FURUKAWA YASUO (JP)
ENDO YUKI (JP)
FURUKAWA YASUO (JP)
International Classes:
H04B5/00; H02J5/00; H02J17/00
Domestic Patent References:
| WO2008112977A1 | 2008-09-18 |
Foreign References:
| US20100308939A1 | 2010-12-09 | |||
| EP2224538A1 | 2010-09-01 | |||
| US20100187913A1 | 2010-07-29 |
Other References:
A. KARALIS; J.D. JOANNOPOULOS; M. SOLJACIC: "Efficient wireless non-radiative mid-range energy transfer", ANNALS OF PHYSICS, vol. 323, January 2008 (2008-01-01), pages 34 - 48, XP055064287, DOI: doi:10.1016/j.aop.2007.04.017
Attorney, Agent or Firm:
MORISHITA, Sakaki (Ebisu-Nishi Shibuya-k, Tokyo 21, JP)
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