Title:
WIRELESS POWER TRANSMISSION SYSTEM
Document Type and Number:
WIPO Patent Application WO/2014/068992
Kind Code:
A1
Abstract:
A transmitting antenna (22) includes a first resonance circuit that contains a transmission coil (Lt). A receiving antenna (31) includes a second resonance circuit that contains a receiving coil (Lr). When electromagnetically coupled to one another, the transmitting antenna (22) and the receiving antenna (31) have two resonance frequencies corresponding respectively to the resonant state of the odd mode and the resonant state of the even mode, and the resonance frequency of the even mode is higher than the resonance frequency of the odd mode. The wireless transmission device (2) is further equipped with a transmission circuit (21) that generates high-frequency power at a variable frequency from the input power and supplies the same to the transmitting antenna, under the control of the control circuit (23) of the wireless transmission device (2). The control circuit (23) of the wireless transmission device (2) sets the frequency of the high-frequency power generated by the transmission circuit (21) to either the resonance frequency of odd mode or the resonance frequency of even mode.
Inventors:
KANNO HIROSHI
ASANUMA KENICHI
ASANUMA KENICHI
Application Number:
PCT/JP2013/006492
Publication Date:
May 08, 2014
Filing Date:
November 01, 2013
Export Citation:
Assignee:
PANASONIC CORP (JP)
International Classes:
H02J17/00
Domestic Patent References:
| WO2012147339A1 | 2012-11-01 | |||
| WO2011132471A1 | 2011-10-27 |
Foreign References:
| JP2012016171A | 2012-01-19 | |||
| JP2008206327A | 2008-09-04 | |||
| US20080278264A1 | 2008-11-13 | |||
| JP4743173B2 | 2011-08-10 |
Other References:
IKUO AWAU ET AL.: "EM Field Made by a Dual Spiral Resonator and Its Application to the WPT system", INSTITUTE OF ELECTRONICS, INFORMATION AND COMMUNICATION ENGINEERS (IEICE) TECHNICAL REPORT, WPT20 12-20, August 2012 (2012-08-01), pages 29 - 34, XP009183204
TATSUYA HOSOTANI: "A Novel Design Theory for Wireless Power Transfer System with Electromagnetic Field Resonant Coupling Using Soft-Switching Technique", IEICE TECHNICAL REPORT, WPT2011-22, December 2011 (2011-12-01)
See also references of EP 2787605A4
TATSUYA HOSOTANI: "A Novel Design Theory for Wireless Power Transfer System with Electromagnetic Field Resonant Coupling Using Soft-Switching Technique", IEICE TECHNICAL REPORT, WPT2011-22, December 2011 (2011-12-01)
See also references of EP 2787605A4
Attorney, Agent or Firm:
SAMEJIMA, Mutsumi et al. (JP)
Mutsumi Sameshima (JP)
Mutsumi Sameshima (JP)
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