Title:
POWER SUPPLY DEVICE, POWER RECEPTION DEVICE, AND POWER SUPPLY/RECEPTION DEVICE
Document Type and Number:
WIPO Patent Application WO/2013/125072
Kind Code:
A1
Abstract:
[Solution] A power supply unit, being a power supply device that supplies power to a power reception device, using electromagnetic induction. The power supply unit has a power supply coil wherein planar coils (4A, 4B), having wire wound around the same point upon the same plane, are arranged from the inside in the radial direction, towards the outside. The planar coils (4A, 4B) in the power supply coil (4) face a space wherein the reception coil is arranged. The power supply unit supplies an AC current having a common frequency to each of the planar coils (4A, 4B), and generates a magnetic field for supplying power using electromagnetic induction to the space wherein the reception coil is arranged. A static magnetic field generated in said arrangement space when a DC current flows to the planar coils (4A, 4B) has a strength at a position corresponding to the inner circumference of the planar coil (4B) that is greater than the strength on both sides of that position in the radial direction of the power supply coil (4). Furthermore, the planar coils (4A, 4B) comprise the same type of wire, and the difference in the wire lengths is less than the length of the outer circumference of the planar coil (4B).
Inventors:
AKIYA TOMOMI (JP)
Application Number:
PCT/JP2012/071009
Publication Date:
August 29, 2013
Filing Date:
August 20, 2012
Export Citation:
Assignee:
LEQUIO POWER TECHNOLOGY CORP (JP)
AKIYA TOMOMI (JP)
AKIYA TOMOMI (JP)
International Classes:
H01F27/28; H01F38/14
Foreign References:
| JP2009504115A | 2009-01-29 | |||
| JP2008136311A | 2008-06-12 | |||
| JP2011045236A | 2011-03-03 | |||
| JP2010165711A | 2010-07-29 | |||
| JP2009027025A | 2009-02-05 | |||
| JP2003309971A | 2003-10-31 | |||
| JP2012186472A | 2012-09-27 | |||
| JP2012060812A | 2012-03-22 | |||
| JP2007265892A | 2007-10-11 |
Other References:
See also references of EP 2824678A4
Attorney, Agent or Firm:
ASAHI PATENT FIRM (JP)
Patent business corporation morning-sun patent firm (JP)
Patent business corporation morning-sun patent firm (JP)
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Claims: