Title:
WIRELESS POWER TRANSMISSION DEVICE
Document Type and Number:
WIPO Patent Application WO/2011/061821
Kind Code:
A1
Abstract:
A wireless power transmission device comprises a power receiving device (2) and a power transmission device (1). The power receiving device (2) includes: a power receiving coil (21) for receiving power transmitted from the power transmission device (1); a resonant circuit (22) connected to the power receiving coil (21); a load circuit (24) supplied with a first signal having a first power value from the resonant circuit (22); a power measurement device (23) for measuring the first power value; and a transmitting/receiving device (26) for transmitting the first power value to the power transmission device (1). The power transmission device (1) includes: a power supply (11) for generating a second signal having a second power value; a resonant circuit (12) receiving the second signal and including a plurality of inductors and capacitors; a power transmission coil (13) connected to the resonant circuit (12) and transmitting power; a power measurement device (15) for measuring the second power value; a transmitting/receiving device (17) for receiving the first power value from the transmitting/receiving device (26); and a control circuit (16) for calculating a power transmission efficiency using the first power value and the second power value and adjusting the inductance values of the inductors and/or the capacitance values of the capacitors on the basis of the power transmission efficiency.
Inventors:
UENO TAKESHI (JP)
ONIZUKA KOHEI (JP)
ONIZUKA KOHEI (JP)
Application Number:
PCT/JP2009/069550
Publication Date:
May 26, 2011
Filing Date:
November 18, 2009
Export Citation:
Assignee:
TOSHIBA KK (JP)
UENO TAKESHI (JP)
ONIZUKA KOHEI (JP)
UENO TAKESHI (JP)
ONIZUKA KOHEI (JP)
International Classes:
H04B5/02
Domestic Patent References:
| WO2009037821A1 | 2009-03-26 |
Foreign References:
| JPH11188113A | 1999-07-13 | |||
| JP2006517778A | 2006-07-27 | |||
| JP2009268181A | 2009-11-12 | |||
| JP2001238372A | 2001-08-31 | |||
| JP2004166384A | 2004-06-10 |
Other References:
See also references of EP 2515414A4
Attorney, Agent or Firm:
YOSHITAKE Kenji et al. (JP)
Kenji Yoshitake (JP)
Kenji Yoshitake (JP)
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