POWER SUPPLY DEVICE, POWER SUPPLY SYSTEM, AND ELECTRONIC DEVICE

Title:

POWER SUPPLY DEVICE, POWER SUPPLY SYSTEM, AND ELECTRONIC DEVICE

Document Type and Number:

WIPO Patent Application WO/2012/132841

Kind Code:

A1

Abstract:

Provided is a power supply device that makes it possible to perform a transmission efficiency control corresponding to the position of a device when power transmission is performed between the devices by using a magnetic field and also provided are a power supply system and an electronic device. The power supply device is equipped with a power transmission unit having a transmission coil for transmitting power using a magnetic field and an auxiliary resonance unit including one or a plurality of resonators. A main resonant frequency in a main resonant operation using the transmission coil when transmitting power and auxiliary resonant frequencies of the resonators are different from each other. Adjusting the difference between such resonant frequencies changes the relationship (corresponding characteristics) between the relative position between a power supply device (transmission side) and an electronic device (receiving side) and a transmission efficiency when transmitting power.

Inventors:

MIYAMOTO TAKASHI (JP)

Application Number:

PCT/JP2012/056138

Publication Date:

October 04, 2012

Filing Date:

March 09, 2012

Export Citation:

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Assignee:

SONY CORP (JP)
MIYAMOTO TAKASHI (JP)

International Classes:

H02J17/00

Foreign References:

JP2009504115A	2009-01-29
JP2008136311A	2008-06-12
JP2010239777A	2010-10-21
JP2005006440A	2005-01-06
JP2008136311A	2008-06-12
JP2009504115A	2009-01-29

Other References: