Title:
WIRELESS ELECTRICITY SUPPLY DEVICE AND WIRELESS POWER TRANSMISSION SYSTEM
Document Type and Number:
WIPO Patent Application WO/2018/159732
Kind Code:
A1
Abstract:
[Problem] To realize high-precision calculation of the opposing-direction separation distance between electricity-supplying and -receiving coils without using a special sensor. [Solution] A wireless electricity supply device Ut for wirelessly transmitting power to a wireless power-receiving device Ur by magnetic coupling of an electricity-supplying coil and an electricity-receiving coil, wherein the wireless electricity supply device Ut comprises: an electricity supply circuit Ct that includes a power conversion circuit PS for converting DC power to AC power of a drive frequency, and an electricity-supplying coil unit Ltu including an electricity-supplying coil that receives AC power supplied from the power conversion circuit PS and generates an AC magnetic field; and a control circuit Stu that controls the magnetic flux amount generated from the electricity-supplying coil. The control circuit Stu calculates the opposing-direction separation distance between the electricity-supplying coil and the electricity-receiving coil from the circuit characteristic value of the wireless electricity supply device Ut in a state in which the magnetic flux amount generated from the electricity-supplying coil is controlled to be constant.
Inventors:
II AKIHIRO (JP)
MIYAZAWA RYO (JP)
MIYAZAWA RYO (JP)
Application Number:
PCT/JP2018/007685
Publication Date:
September 07, 2018
Filing Date:
March 01, 2018
Export Citation:
Assignee:
TDK CORP (JP)
International Classes:
H02J50/90; B60L5/00; B60L11/18; B60M7/00; H02J50/10; H02J50/80
Foreign References:
| JP2016111873A | 2016-06-20 | |||
| US20120242160A1 | 2012-09-27 | |||
| JP2012099644A | 2012-05-24 | |||
| JP2017017771A | 2017-01-19 |
Attorney, Agent or Firm:
WASHIZU Mitsuhiro et al. (JP)
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