Title:
POWER FEEDING SYSTEM DESIGN METHOD AND POWER FEEDING SYSTEM
Document Type and Number:
WIPO Patent Application WO/2013/002240
Kind Code:
A1
Abstract:
A power feeding system design method capable of achieving critical coupling at a desired resonance frequency without adjusting the sizes of coils and the distance therebetween to thereby obtain high transmission efficiency over a broad band. A design is made such that by adjusting the impedances of a DC/AC converter (31) and an AC/DC converter (51), the impedances of a power feeding unit (3) and a power receiving unit (5) decrease as the resonance frequencies of a power feeding side helical coil (33) and a power receiving side helical coil (51) decrease.
A power feeding system capable of suppressing a decrease in transmission efficiency due to the positional displacement between a power feeding side coil and a power receiving side coil to thereby supply electric power with high efficiency from a power feeding unit to a power receiving unit. A variable inductance (L1) that varies the impedance of a power feeding unit (3) is connected in parallel to a power feeding side helical coil (33). A CPU (9) detects the positional displacement (d) between the central axes of power feeding side and power receiving side helical coils (33, 51) using a position sensor (10), and adjusts the variable inductance (L1) according to the positional displacement (d) to adjust the impedance of the power feeding unit (3).
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Inventors:
KAGAMI KAZUYOSHI (JP)
TANAKA SHINGO (JP)
TANAKA SHINGO (JP)
Application Number:
PCT/JP2012/066332
Publication Date:
January 03, 2013
Filing Date:
June 27, 2012
Export Citation:
Assignee:
YAZAKI CORP (JP)
KAGAMI KAZUYOSHI (JP)
TANAKA SHINGO (JP)
KAGAMI KAZUYOSHI (JP)
TANAKA SHINGO (JP)
International Classes:
H02J17/00; H03H7/40
Domestic Patent References:
| WO2010052975A1 | 2010-05-14 | |||
| WO2010064584A1 | 2010-06-10 | |||
| WO2012086625A1 | 2012-06-28 |
Foreign References:
| US20100115474A1 | 2010-05-06 | |||
| US20100123452A1 | 2010-05-20 | |||
| JP2012138976A | 2012-07-19 |
Other References:
ANDRE KURS ET AL.: "Wireless Power Transfer via Strongly Coupled Magnetic Resonances", SCIENCE, vol. 317, 6 July 2007 (2007-07-06), pages 83 - 86, XP008154870
MARIN SOLJACIC ET AL.: "Wireless technology developed to transmit power lights up a 60W bulb in tests", NIKKEI ELECTRONICS, 3 December 2007 (2007-12-03), pages 117 - 128, XP008154918
MARIN SOLJACIC ET AL.: "Wireless technology developed to transmit power lights up a 60W bulb in tests", NIKKEI ELECTRONICS, 3 December 2007 (2007-12-03), pages 117 - 128, XP008154918
Attorney, Agent or Firm:
TAKINO, Hideo et al. (JP)
Hideo Takino (JP)
Hideo Takino (JP)
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Claims: