Title:
CONTACTLESS POWER SUPPLY DEVICE AND CONTACTLESS CHARGING SYSTEM
Document Type and Number:
WIPO Patent Application WO/2011/118371
Kind Code:
A1
Abstract:
A primary-side controller (12) retains a reference current value corresponding to an input current measured in the previous detection cycle by an input current measurement unit (11), in a charging state. The primary-side controller (12) adds the retained reference current value and a predetermined current value, and generates a first threshold value. When the input current measured by the input current measurement unit (11) in the latest detection cycle is equal to or greater than the first threshold value, a determination is made that a foreign metal is present in the vicinity of a first coil (L1).
Inventors:
MATSUMOTO TAKAOKI (JP)
ISAKA ATSUSHI (JP)
SUZUKI KAZUHIRO (JP)
KADA KYOHEI (JP)
KANAKUBO YOSHIHIDE (JP)
NAGATAKE YOHEI (JP)
OHTA KAZUYO (JP)
ISAKA ATSUSHI (JP)
SUZUKI KAZUHIRO (JP)
KADA KYOHEI (JP)
KANAKUBO YOSHIHIDE (JP)
NAGATAKE YOHEI (JP)
OHTA KAZUYO (JP)
Application Number:
PCT/JP2011/055190
Publication Date:
September 29, 2011
Filing Date:
March 07, 2011
Export Citation:
Assignee:
PANASONIC ELEC WORKS CO LTD (JP)
PANASONIC CORP (JP)
MATSUMOTO TAKAOKI (JP)
ISAKA ATSUSHI (JP)
SUZUKI KAZUHIRO (JP)
KADA KYOHEI (JP)
KANAKUBO YOSHIHIDE (JP)
NAGATAKE YOHEI (JP)
OHTA KAZUYO (JP)
PANASONIC CORP (JP)
MATSUMOTO TAKAOKI (JP)
ISAKA ATSUSHI (JP)
SUZUKI KAZUHIRO (JP)
KADA KYOHEI (JP)
KANAKUBO YOSHIHIDE (JP)
NAGATAKE YOHEI (JP)
OHTA KAZUYO (JP)
International Classes:
H02J7/00
Domestic Patent References:
| WO2009081115A1 | 2009-07-02 |
Foreign References:
| JP2001112189A | 2001-04-20 | |||
| JP2001309578A | 2001-11-02 | |||
| JP2000194456A | 2000-07-14 |
Attorney, Agent or Firm:
ONDA, Hironori et al. (JP)
Hironori Onda (JP)
Hironori Onda (JP)
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