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Title:
POWER RECEIVING DEVICE, POWER TRANSMISSION SYSTEM, AND POWER RECEIVING METHOD
Document Type and Number:
WIPO Patent Application WO/2019/155622
Kind Code:
A1
Abstract:
Provided is a power receiving device capable of receiving power efficiently. The power receiving device includes: a secondary-side resonant coil for receiving power from a primary-side resonant coil; a capacitor inserted in series in a resonant coil portion of the secondary-side resonant coil; a series circuit of first and second switches which is connected in parallel with the capacitor; a first rectifier element connected in parallel with the first switch; a second rectifier element connected in parallel with the second switch; a detection unit for detecting a voltage or current supplied to the secondary-side resonant coil; a binarization processing unit for outputting a square wave obtained by binarizing the detected voltage or current; a square wave detection unit for detecting the rising or falling timing and the cycle of the square wave; a reference clock generation unit for generating a reference clock on the basis of the rising or falling timing and the cycle; and a control unit for adjusting the phase or duty ratio of the reference clock on the basis of the detected voltage or current to generate a control clock for switching the on/off of the first and second switches.

Inventors:
SHIMOKAWA, Satoshi (1-1 Kamikodanaka 4-chome, Nakahara-ku, Kawasaki-sh, Kanagawa 88, 〒2118588, JP)
OSHIMA, Hirotaka (1-1 Kamikodanaka 4-chome, Nakahara-ku, Kawasaki-sh, Kanagawa 88, 〒2118588, JP)
Application Number:
JP2018/004672
Publication Date:
August 15, 2019
Filing Date:
February 09, 2018
Export Citation:
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Assignee:
FUJITSU LIMITED (1-1 Kamikodanaka 4-chome, Nakahara-ku Kawasaki-sh, Kanagawa 88, 〒2118588, JP)
International Classes:
H02J50/12
Attorney, Agent or Firm:
ITOH, Tadashige et al. (16th Floor, Marunouchi MY PLAZA 1-1, Marunouchi 2-chome, Chiyoda-k, Tokyo 05, 〒1000005, JP)
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