POWER SUPPLY SYSTEM

WIPO Patent Application WO/2013/108325

A1

In order to provide a power supply system that, during wireless power supply, can supply power selectively to the position of a desired power reception device, in a power transmission unit (610), a plurality of resonance bodies (611) are arrayed in a manner so as to form a 1D or 2D periodic structure, and power is propagated to neighboring resonance bodies (611) by means of a sympathetic resonance effect. An oscillation pattern setting unit (650) sets the oscillation pattern of an electromagnetic field configured from the repetition of a portion at which the electromagnetic field is present and that is an anti-node of oscillation, and a portion at which the electromagnetic field is not present and that is a node of oscillation. Each resonance body (611) can change the impedance thereof between at least the two states of open and short, and the impedance of the resonance bodies (611) at positions corresponding to the oscillation nodes is caused to be open. A power supply unit (620) supplies power to coils (613A) corresponding to the anti-nodes of oscillation centered on the resonance body at a position corresponding to the power reception device (280) that is the subject of power supply, and the amplitude of the power supply, while oscillating, gradually attenuates in accordance with distance from the center.

KOBAYASHI NAOKI (JP)
TSUKAGOSHI TSUNEO (JP)

PCT/JP2012/007394

July 25, 2013

November 16, 2012

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NEC CORP (JP)
KOBAYASHI NAOKI (JP)
TSUKAGOSHI TSUNEO (JP)

H01F38/14; H02J17/00

WO2008032746A1

2008-03-20

JP2010508008A	2010-03-11
JP2012075304A	2012-04-12

IEIRI, Takeshi (JP)
House ON 健 (JP)

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