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Patent Searching and Data


Title:
POWER RECEIVING DEVICEAPPARATUS, WEARABLE DEVICE, AND CONTACTLESS POWER FEEDFEEDING SYSTEM
Document Type and Number:
WIPO Patent Application WO/2019/172366
Kind Code:
A1
Abstract:
Provided A are a power receiving deviceapparatus, a wearable device, and a contactless power feedfeeding system are provided that which are capable of improving transmission efficiency while limit suppressing an increase in size of circuitry and can improve transmission efficiency. This power receiving deviceapparatus (3) is provided with a variable capacitycapacitance circuit (100) and a power receiving coil (41) that constitutes a resonance circuit together with the variable capacitycapacitance circuit (100) together withand a resonance circuit. The variable capacitycapacitance circuit (100) includes: a first capacitor (C1) and a second capacitor (C2) connected in parallel to each other; a first switch (Tr1) serially connected in series to one end side of the first capacitor (C1); and a switch control circuit (110) that controls the on and off of the first switch (Tr1) and includes a first comparator (OP1) that for suppliesying a first control voltage to the first switch (Tr1) in accordance withaccording to the result of a comparison result between a reference voltage and an AC voltage applied to the second capacitor (C2).

Inventors:
TSURUDA, Yoshinori (2-1-11 Tagawa, Yodogawa-ku, Osaka-sh, Osaka 12, 〒5328512, JP)
NAKAMURA, Sousuke (2-17-1 Fujimi, Chiyoda-k, Tokyo 60, 〒1028160, JP)
MIYAURA, Takahiro (2-17-1 Fujimi, Chiyoda-k, Tokyo 60, 〒1028160, JP)
Application Number:
JP2019/009057
Publication Date:
September 12, 2019
Filing Date:
March 07, 2019
Export Citation:
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Assignee:
DAIHEN CORPORATION (2-1-11, Tagawa Yodogawa-ku, Osaka-sh, Osaka 12, 〒5328512, JP)
HOSEI UNIVERSITY (2-17-1, Fujimi Chiyoda-k, Tokyo 60, 〒1028160, JP)
International Classes:
H02J50/12; H02J7/00
Foreign References:
JP2014143776A2014-08-07
JP2013070590A2013-04-18
JP2012182980A2012-09-20
JP2015204708A2015-11-16
JP2013243882A2013-12-05
JP2007501600A2007-01-25
JP2012055157A2012-03-15
JP2004072832A2004-03-04
Attorney, Agent or Firm:
INABA, Yoshiyuki et al. (TMI ASSOCIATES, 23rd Floor Roppongi Hills Mori Tower, 6-10-1, Roppongi, Minato-k, Tokyo 23, 〒1066123, JP)
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