Title:
POWER RECEIVING DEVICE AND POWER RECEIVING METHOD
Document Type and Number:
WIPO Patent Application WO/2011/135722
Kind Code:
A1
Abstract:
A power receiving coil (13) in a power receiving device (3) receives the supply of energy from a power transmitting coil (12) in a power transmitting device (2) by using magnetic field resonance. The energy in the power receiving coil (13) is taken out as electric power by either of power taking-out coils (14_1 to 14_4) selected by a switch (31) and is used for charging a battery (34). A control circuit (35) selects either of the power taking-out coils (14_1 to 14_4) according to the state of charge of the battery (34), thereby improving the charging efficiency of the battery (34).
Inventors:
SHIMOKAWA, Satoshi (1-1 Kamikodanaka 4-chome, Nakahara-ku, Kawasaki-sh, Kanagawa 88, 〒2118588, JP)
Application Number:
JP2010/057702
Publication Date:
November 03, 2011
Filing Date:
April 30, 2010
Export Citation:
Assignee:
FUJITSU LIMITED (1-1 Kamikodanaka 4-chome, Nakahara-ku Kawasaki-sh, Kanagawa 88, 〒2118588, JP)
富士通株式会社 (〒88 神奈川県川崎市中原区上小田中４丁目１番１号 Kanagawa, 〒2118588, JP)
富士通株式会社 (〒88 神奈川県川崎市中原区上小田中４丁目１番１号 Kanagawa, 〒2118588, JP)
International Classes:
H02J17/00; H01F38/14; H02J7/00
Attorney, Agent or Firm:
SAKAI, Hiroaki (Sakai International Patent Office, Kasumigaseki Building 2-5, Kasumigaseki 3-chome, Chiyoda-k, Tokyo 20, 〒1006020, JP)
Claims:
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