Radio electric power transmission systems, and its power transmission device and electricity-receiving device

Title:

Radio electric power transmission systems, and its power transmission device and electricity-receiving device

Document Type and Number:

Japanese Patent JP6215969

Kind Code:

B2

Abstract:

[Problem] To provide a wireless power transmission system capable of coping with two transmission methods and preventing the transmission efficiency from being reduced when transmitting power from a power transmission device to a power receiving device. [Solution] A wireless power transmission system (1) uses the magnetic field coupling between a power transmission coil (12) and a power receiving coil (21) to wirelessly transmit power from a power transmission device (10) to a power receiving device (20). The power transmission device (10) has: a first power transmission circuit (11a) corresponding to a first transmission method; a second power transmission circuit (11b) corresponding to a second transmission method; a first power transmission coil (12a) corresponding to the first transmission method; a second power transmission coil (12b) corresponding to the second transmission method; a first switching element (13a) for switching the connection states between the first power transmission circuit (11a) and the first power transmission coil (12a); a second switching element (13b) for switching the connection states between the second power transmission circuit (11b) and the second power transmission coil (12b); and a control unit (14) for controlling the first switching element (13a) and the second switching element (13b).

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Inventors:

Takeshi Sanbe
Tabata Masashi
Masaki Yamamoto

Application Number:

JP2015559915A

Publication Date:

October 18, 2017

Filing Date:

January 23, 2015

Export Citation:

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Assignee:

ALPS ELECTRIC CO.,LTD.

International Classes:

H02J50/40; H01F38/14; H02J50/10; H02J50/12

Domestic Patent References:

JP2012213252A
JP2012205379A
JP2011125211A
JP2010268665A
JP2012205411A
JP2010183812A
JP2010116441A1
JP2011019291A
JP2012120260A
JP2014128149A

Foreign References:

WO2013073051A1

Attorney, Agent or Firm:

野▲崎▼ 照夫
Iwao Hirayama
Masahiro Matsushita
Katsuyuki Okubo

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