Title:
CONTACTLESS POWER SUPPLY DEVICE CAPABLE OF DETECTING METALLIC FOREIGN OBJECTS AND METALLIC FOREIGN OBJECT DETECTION METHOD THEREFOR
Document Type and Number:
WIPO Patent Application WO/2015/037291
Kind Code:
A1
Abstract:
A contactless power supply device for contactlessly supplying electric power from a power-feeding coil (31) installed on the ground side to a power-receiving coil (32) of a moving body that is stopped at a feeding position, said contactless power supply device comprising, on the ground side, an inverter (20) for outputting a high-frequency alternating current to the power-feeding coil (31) and a metal detection determination processing unit (40) for detecting a metallic foreign object on the power-feeding coil. The metal detection determination processing unit (40) monitors the phases of a voltage and a current output from the inverter (20) to the power-feeding coil (31) and, on the basis of changes in the phases, detects a metallic foreign object that has intruded during power-feeding. In the case of this contactless power supply device, it is possible to use measurement data solely from the ground side to detect metal foreign objects while the moving body is stopped at the feeding location, allowing for simplification of the system.
Inventors:
YASUDA TOMIO (JP)
KISHI HIROYUKI (JP)
FUJITA KOICHI (JP)
KISHI HIROYUKI (JP)
FUJITA KOICHI (JP)
Application Number:
PCT/JP2014/065389
Publication Date:
March 19, 2015
Filing Date:
June 10, 2014
Export Citation:
Assignee:
TECHNOVA INC (JP)
International Classes:
H02J7/00; B60L5/00; B60L11/18; B60M7/00
Domestic Patent References:
| WO2013036947A2 | 2013-03-14 |
Foreign References:
| JP2012249400A | 2012-12-13 | |||
| JP2009112137A | 2009-05-21 | |||
| JP2001258182A | 2001-09-21 | |||
| JP2013135491A | 2013-07-08 | |||
| JP2010183705A | 2010-08-19 | |||
| JP2009011129A | 2009-01-15 | |||
| JP2013059239A | 2013-03-28 |
Other References:
"Foreign matter detection method in the gap of the non-contact power feeding device for electric vehicles", 2012 INSTITUTE OF ELECTRICAL ENGINEERS INDUSTRY APPLICATIONS CONFERENCE OF COLLECTION, NO.4-10, 23 August 2012 (2012-08-23), pages IV115 - IV120
See also references of EP 3050738A4
See also references of EP 3050738A4
Attorney, Agent or Firm:
SAKAI, HIROAKI (JP)
Hiroaki Sakai (JP)
Hiroaki Sakai (JP)
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