Samsung Electronics Co., Ltd.

Nam-Yun Kim

Hee-Won Jung

Hyuk-Choon Kwon

Soo-Yeon Jung

Kang-Ho Byun

Kyung-Woo Lee

Ho-Dong Kim

Jae-Sung Han

Hae-Young Jun

A method and apparatus for controlling a wireless power transmitter configured to transmit power to a wireless power receiver is provided. The method includes receiving a first signal from the wireless power receiver, wherein the first signal comprises load detection indication bits, detecting a change in load of the wireless power transmitter caused by placement of the wireless power receiver in a charging area of the wireless power transmitter, based on the load detection indication bits, and determining whether to transmit a second signal to the wireless power receiver based on detecting the change in load of the wireless power transmitter.

Wireless power transmitter for excluding cross-connected wireless power receiver and method for controlling the same

A method for controlling a wireless power transmitter is provided herein. The method includes outputting a first power for detecting a change in a load impedance of the wireless power transmitter; detecting the change in the load impedance of the wireless power transmitter; outputting a second power for communicating with a wireless power receiver; receiving, from the wireless power receiver, a first signal within a preset time period after detecting the change in the load impedance; determining whether a reception intensity of the first signal is less than or equal to a threshold; and based on determining that the reception intensity of the first signal is less than or equal to the threshold, excluding the wireless power receiver from a wireless power network of the wireless power transmitter, the wireless power receiver being outside of the charging range of the wireless power transmitter.

Wireless power transmitter, wireless power receiver, and control methods thereof

Methods and apparatuses are provided for controlling a wireless power transmitter. First power for charging a first wireless power receiver is transmitted. Demand power information of a second wireless power receiver is received. The demand power information includes a maximum power for the second wireless power receiver. A controller identifies whether the wireless power transmitter is capable of providing the maximum power. A power adjustment command is transmitted to the second wireless power receiver, if the wireless power transmitter is not capable of providing the maximum power. The power adjustment command requests to reduce a magnitude of power to be received by the second wireless power receiver to a level within a range that the wireless power transmitter is capable of supporting. Second power for charging the first wireless power receiver and the second wireless power receiver is transmitted based on at least the reduced magnitude of power.

Method for distributing wireless charge power for multiple wireless power receivers

A wireless power transmitter configured to transmit power to a wireless power receiver and a method for controlling the wireless power transmitted are provided. The method includes applying a detection power for detecting a change in a load impedance of the wireless power transmitter; detecting the change in the load impedance of the wireless power transmitter; receiving, from a wireless power receiver, a first signal within a preset time period after detecting the change, wherein the first signal includes a field for a load impedance detection; determining whether the detected change corresponds to the field of the first signal; determining whether a reception intensity of the first signal is greater than a threshold; and based on a determination that the detected change corresponds to the field of the first signal and the reception intensity of the first signal is greater than the threshold, transmitting, to the wireless power receiver, a second signal to form a communication connection with the wireless power receiver.

One embodiment of the present invention is capable of providing a method for efficiently transmitting power for multiple wireless power receivers by distributing the power of the wireless power receivers as power which matches the respective wireless power receivers in accordance with demand power information from the multiple wireless power receivers.

Methods and apparatus are provided for controlling power transmission in a power transmitter against overvoltage at a power receiver. The power transmitter receives a subscription request to subscribe to a wireless power network, from the power receiver. It is determined whether power transmission is available for the power receiver. The power receiver is informed that the power transmission is beginning, when the power transmission is available. The transmission power is increased and transmitted. It is determined whether a stop request to stop increasing voltage is received at the power transmitter from the power receiver. The increase of the transmission power is stopped when the stop request is received at the power transmitter. Charging of the power receiver is started by transmitting a start charging command from the power transmitter to the power receiver.

Method and power transmitter for controlling power transmission against overvoltage at power receiver

A wireless power transmitter configured to transmit a wireless power to a wireless power receiver and a method for controlling the wireless power transmitted from the wireless power transmitter are provided. The method includes applying a detection power for detecting a change in a load impedance of the wireless power transmitter caused by a placement of the wireless power receiver, detecting the change in the load impedance of the wireless power transmitter, receiving a first signal from the wireless power receiver, determining whether a reception intensity of the first signal is greater than a threshold, and transmitting a second signal to the wireless power receiver based on detecting the change in the load impedance and determining whether the reception intensity of the first signal is greater than the threshold.

Disclosed is a method for controlling a wireless power transmitter for transmitting charging power to a wireless power receiver. The control method of the present invention comprises the steps of: adjusting the internal impedance of the wireless power transmitter such that the impedance variation occurring when the wireless power receiver is positioned is set to a second impedance variation different from the first impedance variation; applying detection power for detecting the wireless power receiver; detecting the second impedance variation during the application of the detection power so as to detect the wireless power receiver; and changing the impedance variation occurring when the wireless power receiver is positioned from the second impedance variation to the first impedance variation.

Wireless power transmitter, wireless power receiver, and method for controlling same

A control method of a wireless power transmitting unit transmitting charging power to a wireless power receiving unit is provided. The control method includes receiving first signals from one or more wireless power receiving units; classifying wireless power receiving units to be communicated with from among the one or more wireless power receiving units based on reception intensities of the received first signals; transmitting wireless transmission power with predetermined level; receiving second signals including voltage information of the classified wireless power receiving units from the classified wireless power receiving units; and communicating with one or more wireless power receiving unit among the classified wireless power receiving units based on the wireless transmission power and the voltage information of the second signals.

A method and apparatus are provided for controlling power transmission in a power transmitter. The method includes receiving power information that includes a minimum voltage and a maximum voltage receivable at a power receiver; determining a reference voltage for dividing a range between the minimum voltage and the maximum voltage into a predetermined portions; dividing the range between the minimum voltage and the maximum voltage into a first voltage range between the minimum voltage and the reference voltage and a second voltage range between the reference voltage and the maximum voltage; receiving from the power receiver a report about a power reception condition including a measured voltage at the power receiver during the power transmission from the power transmitter; and adjusting and supplying the power according to which voltage range the measured voltage belongs to among the divided voltage ranges.

Power transmitter and method for controlling power transmission

A method and apparatus for excluding a cross-connected wireless power receiver in a wireless power transmitter is provided. The method includes determining transmission power while the wireless power transmitter is connected to the wireless power receiver; transferring the determined transmission power to the wireless power receiver; receiving a report indicating a power-receiving state from the wireless power receiver; determining whether the power-receiving state indicated by the report is within a valid range corresponding to the transmission power; and terminating the connection to the wireless power receiver if the power-receiving state is outside of the valid range.

Growing community of inventors

Seoul, South Korea

Nam-Yun Kim