POWER RECEIVING DEVICE AND POWER TRANSMISSION SYSTEM

Title:

POWER RECEIVING DEVICE AND POWER TRANSMISSION SYSTEM

Document Type and Number:

WIPO Patent Application WO/2016/046933

Kind Code:

A1

Abstract:

Provided are a power receiving device and a power transmission system that can improve power supply balance. The power receiving device comprises: a first secondary-side resonance coil that receives power from a primary-side resonance coil by magnetic resonance; a rectification circuit that performs full-wave rectification of AC power inputted from the first secondary-side resonance coil; a smoothing circuit connected to the output side of the rectification circuit; a pair of output terminals connected to the output side of the smoothing circuit; a switch serially inserted in a line between the rectification circuit and the smoothing circuit for switching connection states; and a drive/control unit that drives the switch with a PWM drive pattern determined by a frequency equal to or less than the frequency of magnetic resonance and by a duty ratio established on the basis of a first power reception efficiency of the first secondary-side resonance coil, a first rated output of a first load connected to the pair of output terminals, a second power reception efficiency of a second secondary-side resonance coil of another power receiving device that receives power from the primary-side resonance coil by magnetic resonance with the primary-side resonance coil, and a second rated output of a second load to which power is supplied from the other power receiving device.

Inventors:

UCHIDA AKIYOSHI (JP)

Application Number:

PCT/JP2014/075420

Publication Date:

March 31, 2016

Filing Date:

September 25, 2014

Export Citation:

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Assignee:

FUJITSU LTD (JP)

International Classes:

H02J17/00

Domestic Patent References:

WO2013035873A1

2013-03-14

Foreign References:

JP2014138507A	2014-07-28
JP2014017925A	2014-01-30
JP2011019291A	2011-01-27

Other References: