Title:
POWER TRANSMISSION DEVICE
Document Type and Number:
WIPO Patent Application WO/2018/003568
Kind Code:
A1
Abstract:
Provided is a power transmission device that can improve the transmission efficiency of contactless power transmission to a power reception device in water. The power transmission device transmits power, in water, to the power reception device which has a power reception coil. The power transmission device comprises: a power transmission coil that transmits power to the power reception coil via a magnetic field; a power transmission unit that transmits alternating-current power of a prescribed frequency to the power transmission coil; and a first capacitor that is connected to the power transmission coil and forms a resonant circuit that resonates with the power transmission coil. The prescribed frequency is any frequency between a first frequency at which the geometrical mean value of the Q value of the power transmission coil and the Q value of the power reception coil is maximum, and a second frequency at which the Q value of the power transmission coil and the Q value of the power reception coil have the same value.
Inventors:
DEGUCHI FUTOSHI
KAWATA SOUICHI
EGUCHI KAZUHIRO
OKAMOTO KATSUYA
KOYANAGI YOSHIO
HASABA RYOSUKE
KAWATA SOUICHI
EGUCHI KAZUHIRO
OKAMOTO KATSUYA
KOYANAGI YOSHIO
HASABA RYOSUKE
Application Number:
PCT/JP2017/022515
Publication Date:
January 04, 2018
Filing Date:
June 19, 2017
Export Citation:
Assignee:
PANASONIC CORP (JP)
International Classes:
H02J50/12; H02J50/50; B63C11/00
Domestic Patent References:
| WO2015087724A1 | 2015-06-18 | |||
| WO2014034491A1 | 2014-03-06 | |||
| WO2017013825A1 | 2017-01-26 |
Other References:
RYOSUKE HASABA ET AL.: "Study of wireless power transmission for under seawater using EM simulation", PROCEEDINGS OF THE 2016 IEICE GENERAL CONFERENCE TSUSHIN 1, 15 March 2016 (2016-03-15), pages 681
DAI FUTAGAMI ET AL.: "Creation of industrial value of sea floor by implementation of undersea wireless power transfer", 2015 PROCEEDINGS OF THE SOCIETY CONFERENCE OF IEICE 1, 8 September 2015 (2015-09-08), pages S62 - S63
DAI FUTAGAMI ET AL.: "Creation of industrial value of sea floor by implementation of undersea wireless power transfer", 2015 PROCEEDINGS OF THE SOCIETY CONFERENCE OF IEICE 1, 8 September 2015 (2015-09-08), pages S62 - S63
Attorney, Agent or Firm:
Eikoh Patent Firm, P.C. (JP)
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