Korea Advanced Institute of Science and Technology

Sk Innovation Co., Ltd.

University-industry Cooperation Group of Kyung Hee University

Sk Global Chemical Co., Ltd.

Dong Ryul Park

Hee Soo Kim

Ho Won Lee

Bom Son Lee

Seung Young Ahn

Seon Ju Lim

Bum Jin Park

Jong Wook Kim

Sung Ryul Huh

Yu Jun Shin

Seong Ho Woo

Jae Won Rhee

Chang Min Lee

Disclosed is a wireless power transmission system including a first circuit comprising a transmitting coil for transmitting power; and a second circuit comprising a shielded coil, wherein, in the transmitting coil and the shielded coil, frequency division wherein an impedance magnitude of the second circuit is minimized at a first frequency smaller than a resonant frequency of the second circuit and a second frequency larger than the resonant frequency of the second circuit occurs, and inductive coupling wherein the first frequency is larger than a fundamental frequency of the first circuit and the second frequency is smaller than a third high frequency of the second circuit.

Wireless power transmission system

Disclosed a wireless power transfer system configured to selectively drive at least one transmitting coil among transmitting coils that are included in a transmitter; and an operation method of the wireless power transfer system, and more particularly, to a technology of verifying a coupling coefficient between each of transmitting coils and a receiving coil when the receiving coil is located on the transmitting coils and selectively driving at least one transmitting coil among the transmitting coils based on the verified coupling coefficient. According to an embodiment of the present disclosure, the wireless power transfer system includes a transmitter including the transmitting coils; a receiver including a receiving coil configured to receive wireless power from at least one transmitting coil among the transmitting coils; and a controller configured to verify a coupling coefficient between each of the transmitting coil and the receiving coil and selectively drive the at least one transmitting coil based on the verified coupling coefficient.

Wireless power transfer system for selectively driving at least one transmitting coil among transmitting coils and operation method thereof

In a specific example according to the present invention, a method is disclosed in which a catalytic reaction is used in order to convert acetic acid, which has been produced by the biological processing or physicochemical processing of biomass, into an aromatic compound constituting a raw material for a high-added-value product such as BTX and, more particularly, p-xylene.

Method for producing aromatic compound from biomass-derived acetic acid

Disclosed are an amorphous calcium phosphate catalyst for use in production of 1,3-butadiene and methyl ethyl ketone from 2,3-butanediol, a preparation method thereof, and a method of producing 1,3-butadiene and methyl ethyl ketone from 2,3-butanediol using the amorphous calcium phosphate catalyst.

Amorphous calcium phosphate catalyst for use in production of 1,3-butadiene and methyl ethyl ketone from 2,3-butanediol, and method of preparing the same

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Daejeon, South Korea

Dong Ryul Park