Samsung Electronics Co., Ltd.

Korea Advanced Institute of Science and Technology

Industry-University Cooperation Foundation Hanyang University

Korea Railroad Research Institute

Hongik University Industry-academia Cooperation Foundation

Kolen Co., Ltd.

Chi Hyung Ahn

Sang Wook Kwon

Ki Young Kim

Yun Kwon Park

Young Ho Ryu

Keum Su Song

Dong Zo Kim

Nam Yun Kim

Jae Hyun Park

Bong Chul Kim

Byoung Hee Lee

Chang Wook Yoon

Jin Sung Choi

Ki Jun Kim

Gun Woo Moon

Chang Sik Yoo

Young Jin Moon

Shin Young Cho

Sang Cheol Moon

Jae Ho Lee

Eun Seok Park

Ji Eun Kim

Jae Hoon Choi

Chan Goo Kang

Se Jin Kim

Keumsu Song

Byung Chul Park

Sung Soo Park

Hyuk Choon Kwon

Jeong Hae Lee

Jae Hyeong Cho

Jae Hee Kim

Jong Won Yu

Jun Seok Lee

Kyeong Jun Ko

Wang Sang Lee

Seh Chan Oh

Jung Tai Kim

Sang Gyu Ha

Kyung Young Jung

Bong Chui Kim

Ju Hui Kim

Sang Hoon Chang

Dal Hoi Shim

A wireless power transmission apparatus includes a source resonator configured to transmit an output power from which a harmonic component has been cancelled to a wireless power reception apparatus by resonating with a target resonator of the wireless power transmission apparatus, and a resonant power generator configured to differentially input a first input signal and a second input signal to the source resonator, and cancel the harmonic component of the output power.

Method and apparatus for wireless power transmission with harmonic noise cancellation

A wireless power transmission apparatus includes resonators configured to transmit a power wirelessly to another resonator, and a controller configured to control a current magnitude and/or a voltage magnitude of a power to be provided to each of the resonators. The apparatus further includes a feeder configured to provide the power to each of the resonators.

Wireless power transmission apparatus and wireless power transmission method

A wireless power transmitter for wirelessly transmitting power is provided. The wireless power transmitter includes four cells configured to wirelessly transmit power to a wireless power receiver; a power source configured to provide power to one of the four cells; and a connection unit configured to connect the four cells to each other, wherein the connection unit is further configured to connect the four cells in a cross configuration.

Magnetic field adjusting three-dimensional flexible resonator for wireless power transmission system

A stereoscopic flexible resonator is provided. The stereoscopic flexible stereoscopic resonator includes at least one cell, at least one resonator including a capacitor, and a connection unit configured to connect the cell and the resonator in a stereoscopic structure.

A wireless power relay apparatus includes a relay resonator configured to relay power from a source resonator configured to wirelessly transmit the power, to a target resonator configured to wirelessly receive the power through a mutual resonance, the relay resonator having a higher quality factor than the source resonator and the target resonator.

Wireless power transmission system and wireless power relay apparatus

A method and an apparatus for controlling wireless power transmission are provided. An apparatus for controlling wireless power transmission includes a controller configured to determine an output voltage of a power factor correction unit based on charging information of a battery, the power factor correction unit configured to correct an input voltage into the determined output voltage, and output a variable voltage, and a resonance unit configured to transmit power converted from the variable voltage to a wireless power reception apparatus.

Method and apparatus for controlling wireless power transmission

A resonant apparatus in a wireless power transmission system, includes a main resonant unit configured to form magnetic resonant coupling between the resonant apparatus and a resonator. The resonant apparatus further includes a field guiding resonant unit configured to focus a magnetic field on an internal portion of the main resonant unit, and a field additive resonant unit configured to adjust a magnitude of a magnetic field formed between the main resonant unit and the field guiding resonant unit.

Apparatus and method for resonance in wireless power transmission system

A wireless power transmission apparatus includes a communicator configured to receive information associated with a reference power of a wireless power reception apparatus and information associated with a power measured at an input terminal of a direct current-to-direct current (DC/DC) converter of the wireless power reception apparatus, a controller configured to control an output power based on the information associated with the reference power and the information associated with the power measured, and a source resonator configured to transmit the output power to the wireless power reception apparatus by resonating with a target resonator.

Method and apparatus for wireless power transmission for efficent power distribution

An authentication of a power transmitting unit (PTU) includes determining whether an access right to an external device is present in a power receiving unit (PRU) based on identification information of the PRU, and network-connecting the PRU to the external device in response to a result of the determining being that the access right is present in the PRU.

Method and apparatus for authentication in wireless power transmission system

An apparatus and a method for charge control are provided. The apparatus for charge control may include an integrated direct current-to-direct current (DC/DC) converter configured to step up an output voltage level of a load to be greater than or equal to a supply voltage level set in a power amplifier, and the power amplifier configured to convert a direct current (DC) voltage stepped up by the integrated DC/DC converter into an alternating current (AC) voltage based on a resonant frequency, and to amplify the converted AC voltage. The apparatus for charge control may include a rectification unit configured to convert an AC power received wirelessly into a DC power; and a DC/DC converter configured to step down a voltage level of the DC power to a voltage level required by a load in the receiving mode.

Apparatus and method for charging control in wireless charging system

An apparatus and method for protecting a communication device of a railroad car is provided. The apparatus includes an antenna portion configured to include main antennas and an auxiliary antenna, a main receiver configured to check a magnitude of a received signal transferred through the main antennas of the antenna portion, an auxiliary receiver configured to check a magnitude of a received signal transferred through the auxiliary antenna of the antenna portion, and a controller configured to compare the magnitude of the signal received by the main receiver and the magnitude of the signal received by the auxiliary receiver, determine whether there is a jamming signal according to a comparison result, and take a preset countermeasure when it is determined that there is a jamming signal.

Apparatus and method for protecting communication device of railroad car

A power transmitting unit (PTU) transmits a power wirelessly based on a location of a power receiving unit (PRU). The PTU determines whether the PRU is located within a charging area of the PTU based on frequency information corresponding to an inflection point detected on a curve of electrical characteristics of a resonator of the PTU.

Method of power transmitting unit (PTU) for determining location of power receiving unit (PRU), and PTU employing the method

A wireless power transmitter includes a source resonator configured to wirelessly transmit power via magnetic coupling with a target resonator; and an impedance adjusting unit configured to adjust an impedance of the source resonator using a plurality of impedance-matching bars located in the source resonator.

Wireless power transmitter, wireless power relay apparatus, and wireless power receiver

Growing community of inventors

Suwon-si, South Korea

Chi Hyung Ahn