US 2019/0103768 A1Published application

Power transmission system

AssigneeFujitsu Limited

InventorAkiyoshi Uchida

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Abstract

A power-transmission system includes a power transmitter; receivers that each receive power by electricity via a space from the power transmitter; a first determiner configured to determine based on power-data concerning rated-power each received from the receivers and the received power whether the receiver excessive in the received power and the receiver insufficient in the received power are present; a second determiner that determines whether the received power of the receiver excessive in the received power is equal to or larger than a predetermined value; and a command generator configured to transmit, to the receiver determined as having the received power equal to or larger than the predetermined value by the second determiner, a command for reducing the received power with the receivers to be equal to or smaller than a predetermined target value.

Claims9

Dependent claims

A power transmission system comprising:

a power transmitter;
and
a plurality of power receivers configured to simultaneously receive electric power from the power transmitter with magnetic field resonance or electric field resonance, wherein
each of the plurality of power receivers includes:
a secondary-side resonance coil;
an adjuster configured to adjust received electric power received by the secondary-side resonance coil;
a power reception-side modem configured to communicate with the power transmitter;
and
a power reception-side controller configured to control the adjuster,
the power transmitter include:
a primary-side resonance coil configured to transmit electric power to the secondary-side resonance coil of each of the plurality of power receivers with the magnetic field resonance or the electric field resonance;
a power transmission-side modem configured to communicate with the plurality of power receivers;
a first determiner configured to determine based on electric power data concerning rated electric power received from each of the plurality of power receivers and the received electric power whether the power receiver excessive in the received electric power and the power receiver insufficient in the received electric power are present;
a second determiner configured to, when the first determiner determines that the power receiver excessive in the received electric power and the power receiver insufficient in the received electric power are present, determine whether the received electric power of the power receiver excessive in the received electric power is equal to or larger than a predetermined value;
and
a command generator configured to transmit, to the power receiver determined as having the received electric power equal to or larger than the predetermined value by the second determiner, via the power transmission-side modem, a command for reducing the received electric power with the adjuster to be equal to or smaller than a predetermined target value,
when the command is received by the power reception-side modem, the power reception-side controller controls the adjuster until the received electric power decrease to the predetermined target value or smaller, and
when the received electric power decreases to the predetermined target value or smaller, the power reception-side modem transmits the electric power data to the power transmission-side modem.

15 more elements

A power transmission system comprising:

a power transmitter;
and
a plurality of power receivers configured to simultaneously receive electric power from the power transmitter with magnetic field resonance or electric field resonance, wherein
each of the plurality of power receivers includes:
a secondary-side resonance coil;
an adjuster configured to adjust received electric power received by the secondary-side resonance coil;
a power reception-side modem configured to communicate with the power transmitter;
a power reception-side determiner configured to determine whether the received electric power is a predetermined value or smaller;
and
a controller configured to, when the power reception-side determiner determines that the received electric power is not the predetermined value or smaller, adjust the adjuster by a predetermined degree to reduce the received electric power and, when the power reception-side determiner determines that the received electric power is the predetermined value or smaller, cause the power reception-side modem to transmit a report signal indicating an adjustment degree of the adjuster to the power transmitter,
the power transmitter include:
a primary-side resonance coil configured to transmit electric power to the secondary-side resonance coils of the plurality of power receivers with the magnetic field resonance or the electric field resonance;
a power transmission-side modem configured to communicate with the plurality of power receivers;
and
a command generator configured to, when receiving the report signal via the power transmission-side modem, transmit, via the power transmission-side modem, a command for causing the controller to adjust the adjuster based on the adjustment degree indicated by the report signal.

12 more elements

Dependencies are inferred from the claim text.

Facts

Application: 16/204,708Filed 29 Nov 2018
Priority: 6 Jun 2016
Published: 4 Apr 2019
Term ends: Not estimatedThe source records don’t support an estimate.

Classification7 codes

H02J 50/12
Using inductive coupling: of the resonant type
H02J 7/42
Characterised by the exchange of charge or discharge related data: with electronic devices having internal batteries, e.g. mobile phones
H02J 50/40
Circuit arrangements or systems for wireless supply or distribution of electric power: using two or more transmitting or receiving devices
H02J 50/80
Circuit arrangements or systems for wireless supply or distribution of electric power: involving the exchange of data, concerning supply or…