US 2020/0287422 A1 · POWER TRANSMITTING METHOD AND POWER TRANSMITTER FOR COMMUNICATION WITH POWER RECEIVER

Abstract

A method and power transmitter for efficiently controlling power transmission to one or more power receivers in a wireless multi-power transmission system are provided. The method includes performing, when a predetermined measurement cycle arrives, a load measurement; comparing a current load measurement value with a previous load measurement value; determining whether the current load measurement value is increased over the previous load measurement value by at least as much as a first predetermined threshold; gradually increasing, when the load measurement value is increased over the previous load measurement value by at least as much as the first threshold, a transmission power value until a request for a subscription to a wireless multi-power transmission network from a power reception target within a predetermined time limit; and stopping, when the request for the subscription is not received before the time limit is exceeded, power transmission to the power reception target.

Claims20

Dependent claims

A method of wirelessly transmitting power by a wireless power transmitter, the method comprising:

outputting, through a resonator of the wireless power transmitter, first power;
based on the first power, detecting a load variation;
in response to detecting the load variation, outputting, through the resonator, second power for communicating with a wireless power receiver;
changing a power level of the second power from a first level to a second level while outputting the second power;
receiving a first signal from the wireless power receiver while outputting the second power, wherein the first signal includes reference information;
based on the reference information, transmitting a second signal to the wireless power receiver;
and
transmitting, through the resonator, third power to the wireless power receiver for charging the wireless power receiver.

5 more elements

A wireless power transmitter for wirelessly transmitting power, the wireless power transmitter comprising:

a resonator;
communication circuitry;
and
a processor configured to:
control to output, through the resonator, first power;
based on the first power, detect a load variation;
control to, in response to detecting the load variation, output, through the resonator, second power for communicating with a wireless power receiver;
control to change a power level of the second power from a first level to a second level while outputting the second power;
control to receive a first signal from the wireless power receiver via the communication circuitry while outputting the second power, wherein the first signal includes reference information;
based on the reference information, control to transmit a second signal to the wireless power receiver via the communication circuitry;
and
control to transmit, through the resonator, third power to the wireless power receiver for charging the wireless power receiver.

9 more elements

Dependencies are inferred from the claim text.

Facts

Application

16/883,660Filed 26 May 2020

Priority

KR 10-2011-004639517 May 2011

Published

10 Sep 2020

Term ends

Not estimatedThe source records don’t support an estimate.

Classification15 codes

B60L 53/12
Characterised by the energy transfer between the charging station and the vehicle: inductive energy transfer
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
H02J 50/60
Circuit arrangements or systems for wireless supply or distribution of electric power: responsive to the presence of foreign objects, e.g.…

Family

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