公开(公告)号：US20230396196A1

公开(公告)日：2023-12-07

申请号：US18032712

申请日：2020-11-11

Applicant: KOREA INSTITUTE OF OCEAN SCIENCE & TECHNOLOGY

Inventor： So Young SUNG ,  Hee Jin KANG ,  Hyung Won SHIM ,  Youngshik KIM ,  Yunho KIM ,  Jang Pyo HONG

IPC: H02P21/13 ,  G01R31/34 ,  G01R19/00 ,  H02P21/22

CPC classification number: H02P21/13 ,  G01R31/34 ,  G01R19/0092 ,  H02P21/22

Abstract: Provided, according to one embodiment, is a method for determining a current of an electric motor or a generator, the method comprising the steps of: acquiring characteristics of a filter for eliminating noise occurring in a process for determining a current of an electric motor or a generator; determining a time delay caused by the filter, on the basis of a change in a phase indicating the characteristics of the filter, the change resulting from a change in an operating frequency of the electric motor or the generator; and determining the current of the electric motor or the generator by compensating the time delay.

公开(公告)号：US20240374099A1

公开(公告)日：2024-11-14

申请号：US18781313

申请日：2024-07-23

Applicant: KOREA INSTITUTE OF OCEAN SCIENCE & TECHNOLOGY

Inventor： Young Shik KIM ,  Hyung Won SHIM

IPC: A47L9/16

Abstract: Proposed is a microplastic collection device utilizing a cyclone The device may include a cylindrical barrel part accommodating a first suction fan and a first suction fan drive at an upper end thereof, and a microplastic suction pipe installed at an interior center of the barrel part to communicate with the first suction fan and configured to suck in microplastics. The device may also include a suction pipe spaced at a predetermined distance from the upper end of the barrel part, coupled to an outer circumferential surface of the barrel part to communicate with an interior of the barrel part, and configured to suck in external particles. The device may further include a microplastic capture pipe coupled to an upper end outer circumferential surface of the barrel part that surrounds the suction pipe. The device can effectively collect microplastics on seashores and separate them from nature.

公开(公告)号：US20230174214A1

公开(公告)日：2023-06-08

申请号：US17607269

申请日：2020-08-29

Applicant: Korea Institute of Ocean Science & Technology

Inventor： Hee Jin KANG ,  Young Shik KIM ,  Hyung Won SHIM ,  So Young SUNG ,  Jang Pyo HONG ,  Yun Ho KIM

IPC: B63H21/17 ,  G01M10/00 ,  G01M15/04 ,  H01M8/04313

CPC classification number: B63H21/17 ,  G01M10/00 ,  G01M15/04 ,  H01M8/04313 ,  B63H2021/205

Abstract: Provided are a marine testbed and a marine test method for providing marine verification and securing a track record of an eco-friendly propulsion system for a ship, wherein the marine testbed and the marine test method test and evaluate applicability of a hybrid propulsion system to the ship and facilitate securing of a track record, the hybrid propulsion system utilizing a battery, a fuel cell, a zero-carbon fuel engine, a zero-carbon fuel mixed-combustion engine, and a heterogeneous eco-friendly alternative fuel for the ship which are essential for developing an eco-friendly ship.