US 2016/0111896 A1 · POWER RECEIVING DEVICE AND WIRELESS POWER SUPPLY SYSTEM

Abstract

Provided is a power receiving device in which supply of power from a power supply device can be stopped while a reduction in Q-value is suppressed. The power receiving device includes a first antenna which forms resonant coupling with an antenna of the power supply device; a second antenna which forms electromagnetic induction coupling with the first antenna; a rectifier circuit including a plurality of switches and performing a first operation or a second operation depending on whether the plurality of switches is ON or OFF, the first operation being an operation in which voltage applied from the second antenna is rectified to be outputted, and the second operation being an operation in which a pair of power supply points is short-circuited; a load to which the voltage is applied; and a control circuit which generates a signal for selecting ON or OFF of the plurality of switches.

Claims9

Dependent claims

(canceled)

A power receiving device comprising:

a first antenna configured to form resonant coupling and receive first power through the resonant coupling;
a second antenna configured to form electromagnetic induction coupling with the first antenna and receive second power from the first antenna through the electromagnetic induction coupling with the first antenna;
a rectifier circuit comprising a first switch and a second switch, the rectifier circuit being configured to generate DC voltage by rectifying AC voltage through the first antenna and the second antenna;
a load to which the DC voltage outputted from the rectifier circuit is applied;
and
a control circuit configured to control ON or OFF of the first switch and the second switch,
wherein the control circuit is configured so that the DC voltage is generated by the rectifier circuit in the case where one of the first switch and the second switch is ON and the other of the first switch and the second switch is OFF, and
wherein the control circuit is configured so that the DC voltage is not generated by the rectifier circuit in the case where both of the first switch and the second switch are ON.

5 more elements

Dependencies are inferred from the claim text.

Facts

Application

14/982,331Filed 29 Dec 2015

Priority

JP 2011-28243423 Dec 2011

Published

21 Apr 2016

Term ends

Not estimatedThe source records don’t support an estimate.

Classification15 codes

H02J 50/005
Circuit arrangements or systems for wireless supply or distribution of electric power: mechanical details of housing or structure aiming to…
H02J 7/825
Control of state of charge [SOC]: detection of fully charged condition
H02J 50/12
Using inductive coupling: of the resonant type
H02J 50/40
Circuit arrangements or systems for wireless supply or distribution of electric power: using two or more transmitting or receiving devices

Power receiving device and wireless power supply system

Life of this patent

Power receiving device and wireless power supply system

Life of this patent

Abstract

Claims9