Title:
NON-CONTACT POWER TRANSMISSION DEVICE AND NEAR-FIELD ANTENNA FOR SAME
Document Type and Number:
WIPO Patent Application WO/2011/083594
Kind Code:
A1
Abstract:
Disclosed is a structure for raising the Q-value of a near-field antenna used in a non-contact power transmission device that uses magnetic-field coupling in the near field, and for raising the efficiency of power transmission. The near-field antenna used in the non-contact power transmission device galvanically isolates a resonant circuit containing a resonant first inductor (31) and a first capacitor (32) from a transmission circuit or a reception circuit, and can maintain a high Q even if electromagnetic coupling or inductive coupling is used between the transmission circuit or the reception circuit and said near-field antenna by means of a second inductor (33) or a second capacitor (34) and the distance between antennas becomes far leading to decreased coupling between the antennas.
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Inventors:
CHOE SEONG-HUN (JP)
KANAMARU MASATOSHI (JP)
KANAMARU MASATOSHI (JP)
Application Number:
PCT/JP2010/064618
Publication Date:
July 14, 2011
Filing Date:
August 27, 2010
Export Citation:
Assignee:
HITACHI LTD (JP)
CHOE SEONG-HUN (JP)
KANAMARU MASATOSHI (JP)
CHOE SEONG-HUN (JP)
KANAMARU MASATOSHI (JP)
International Classes:
H01F38/14
Domestic Patent References:
| WO2009037821A1 | 2009-03-26 |
Foreign References:
| JP2009296848A | 2009-12-17 |
Attorney, Agent or Firm:
POLAIRE I. P. C. (JP)
Polaire Intellectual Property Corporation (JP)
Polaire Intellectual Property Corporation (JP)
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Claims: