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Title:
POWER TRANSMISSION DEVICE, POWER RECEPTION DEVICE, AND WIRELESS POWER FEED SYSTEM
Document Type and Number:
WIPO Patent Application WO/2019/176375
Kind Code:
A1
Abstract:
In order to enable safe communication using an AC magnetic field, this power transmission device is provided with: a primary coil that performs wireless power feed by emitting an AC magnetic field; and a power transmission control unit that superimposes primary-side information on an AC magnetic field by varying the intensity of the AC magnetic field over time, wherein the AC magnetic field intensity employed by the power transmission control unit to superimpose the primary-side information is weaker than that employed when no primary-side information is superimposed by the power transmission control unit.

Inventors:
MIYAZAKI Hideki (2520, Takaba, Hitachinaka-sh, Ibaraki 03, 〒3128503, JP)
YAMAZOE Takanori (6-6, Marunouchi 1-chome, Chiyoda-k, Tokyo 80, 〒1008280, JP)
IDO Hiroshi (1, Koizumi, Oyamazaki, Oyamazaki-cho, Otokuni-gu, Kyoto 25, 〒6188525, JP)
Application Number:
JP2019/003950
Publication Date:
September 19, 2019
Filing Date:
February 05, 2019
Export Citation:
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Assignee:
HITACHI AUTOMOTIVE SYSTEMS, LTD. (2520, Takaba Hitachinaka-sh, Ibaraki 03, 〒3128503, JP)
International Classes:
H02J50/80; H02J7/00; H02J50/12
Foreign References:
JP2010130835A2010-06-10
JP2013115917A2013-06-10
JP2012200085A2012-10-18
Attorney, Agent or Firm:
TODA Yuji (6-1, Marunouchi 1-chome, Chiyoda-k, Tokyo 20, 〒1008220, JP)
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