Lotte Chemical Corporation

Korea Advanced Institute of Science and Technology

University-Industry Cooperation Group of Kyung Hee University

Bum Jin Park

Bom Son Lee

Chang Min Seo

Seung Young Ahn

Dong Jun Im

Dong Wook Kim

Dong Ryul Park

Jong Wook Kim

Ka Ram Hwang

Jin Won Lee

Jae Hyoung Park

Hong Kyun Kim

Sung Ryul Huh

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

A hollow fiber membrane of the present invention is a hollow fiber membrane having an outer surface and an inner surface, wherein the inner surface has a zebra stripe pattern in which dense portions and porous portions are alternately formed in the longitudinal direction, and the outer surface has a maximum pore size of about 1 &#x3bc;m or less (&#x2264;about 1 &#x3bc;m), and wherein the hollow fiber membrane has a water permeability (flux) of &#x2265;about 1,300 LMH/bar to &#x2264;about 5,000 LMH/bar.

Hollow fiber membrane and manufacturing method thereof

Disclosed are a microrobot propulsion apparatus based on wireless power transmission and a method of manufacturing the same. The microrobot propulsion apparatus according to one embodiment of the present disclosure may include a coil part for outputting a time-varying magnetic field or a static magnetic field applied to a microrobot including a coil for receiving power and a coil for an electromagnet, and a multipurpose inverter including a static magnetic field path portion allowing the coil part to output the static magnetic field and a time-varying magnetic field path portion allowing the coil part to output the time-varying magnetic field.

Microrobot propulsion apparatus based on wireless power transfer including multipurpose inverter and method of manufacturing the same

A hollow fiber membrane and a method of preparing the same. The hollow fiber membrane has an inner surface and an outer surface, wherein the inner surface has a zebra-stripe pattern in which a dense portion and a porous portion are alternately formed in a longitudinal direction of the hollow fiber membrane.

Hollow fiber membrane and method of preparing the same

The present invention relates to a polymer resin composition including: a vinylidene fluoride-based polymer resin; and one or more types of nucleating agents selected from the group consisting of an organic phosphate and a C-Cbicycloalkane substituted with one or more carboxylic acid metal salt functional groups, and a polymer resin molded product prepared using the polymer resin composition.

Polymer resin composition and vinylidene fluoride-based polymer molded product

Growing community of inventors

Daejeon, South Korea

Bum Jin Park