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：US20230378848A1

公开(公告)日：2023-11-23

申请号：US17816822

申请日：2022-08-02

Applicant: Korea Institute of Ocean Science & Technology

Inventor： Hee Jin KANG ,  Yunho KIM

IPC: H02K7/09 ,  B63H9/02

CPC classification number: H02K7/09 ,  B63H9/02

Abstract: A magnetic levitation rotor sail is proposed. The rotor sail may include a coil unit provided at a lower portion of a body of the rotor sail, and an electromagnet configured to levitate the coil unit. The rotor sail may also include a support member supporting the electromagnet, and a gap sensor provided at the support member and configured to measure a gap between the coil unit and the electromagnet.

公开(公告)号：US20210221471A1

公开(公告)日：2021-07-22

申请号：US16307117

申请日：2018-03-28

Applicant: Korea Institute of Ocean Science & Technology

Inventor： Hee Jin KANG ,  Jin CHOI ,  Hae Seong AHN ,  Kwang Soo KIM ,  Geun Tae YIM ,  Myoung Soo KIM

IPC: B63B13/00 ,  B63B3/38 ,  B63B3/16 ,  B63B39/06 ,  B63B39/03

Abstract: A ballast water-free ship using a difference in the depth of the bottom shell plate between the bow/stern and the midship section and a construction method thereof. A stepped portion is formed between either the bow or the stern and the midship section, such that the depth of the bottom shell plate of either the bow or the stern differs from the depth of the bottom shell plate of the cargo containment in the midship section, so that cargo can be loaded and unloaded without ballast water operation.

公开(公告)号：US20230253575A1

公开(公告)日：2023-08-10

申请号：US18003406

申请日：2020-09-09

Applicant: KOREA INSTITUTE OF OCEAN SCIENCE & TECHNOLOGY

Inventor： Hee Jin KANG ,  Young Shik KIM ,  Yun Ho KIM ,  Jang Pyo HONG

IPC: H01M6/34 ,  B63G8/08 ,  H01M6/50 ,  H01M6/02

CPC classification number: H01M6/34 ,  B63G8/08 ,  H01M6/02 ,  H01M6/50 ,  H01M2220/20

Abstract: Proposed are a submarine power supply system and power supply method using a seawater battery, the system having a chargeable/dischargeable battery that is arranged on the outside of a pressure hull, so as to use, as a cathode, sodium ions dissolved in seawater, and thus produce electric power, which is then used as electric power required for operating a submarine.

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.

公开(公告)号：US20230373604A1

公开(公告)日：2023-11-23

申请号：US17813846

申请日：2022-07-20

Applicant: Korea Institute of Ocean Science & Technology

Inventor： Hee Jin KANG ,  Jang Pyo HONG

IPC: B63H9/02

CPC classification number: B63H9/02

Abstract: An upright tank-based propulsion assistance rotor sail system is proposed. The system may include an upright tank fixed to a hull of a ship, and a rotor sail in a form of a cylindrical shape having a length and diameter greater than or equal to the upright tank, and installed to surround part or all of an outer circumferential surface of the upright tank. The rotor sail may be rotatably installed while surrounding the upright tank concentrically with the upright tank, and may be movable along a height direction of the outer circumferential surface of the upright tank depending on situations to maintain a predetermined height. In addition, a vessel equipped with the upright tank-based propulsion assistance rotor sail system is proposed, The fuel tank may be installed to stand upright on the vessel so that the rotor sail is installed to be movable in the vertical direction.