公开(公告)号：US20240204770A1

公开(公告)日：2024-06-20

申请号：US18513413

申请日：2023-11-17

Applicant: KOREA ELECTRONICS TECHNOLOGY INSTITUTE

Inventor： Jin Hong KIM ,  Joon Sung PARK ,  Byong Jo HYON ,  YONGSU NOH ,  DONGMYOUNG JOO ,  Sang Min PARK ,  Daeyeon HWANG ,  Hyoung-Kyu YANG ,  JUN HYUK CHOI

IPC: H03K17/16 ,  H02M3/156

CPC classification number: H03K17/161 ,  H02M3/156 ,  H03K2217/0027 ,  H03K2217/0081

Abstract: The present disclosure relates to a power converter capable of improving stabilization while minimizing loss when switching a switch included in the power converter. The power converter includes a switch; a gate driver configured to drive the switch at a predetermined duty ratio and apply a positive voltage when the switch is turned on and a negative voltage when the switch is turned off; a negative power supply unit configured to supply the negative voltage to the gate driver and vary a magnitude of the negative voltage; a current sensor configured to sense a current flowing in the switch; and a control unit configured to control the negative power supply unit to adjust the magnitude of the negative voltage applied to the switch according to a value sensed by the current sensor.

公开(公告)号：US20240215201A1

公开(公告)日：2024-06-27

申请号：US18541919

申请日：2023-12-15

Applicant: KOREA ELECTRONICS TECHNOLOGY INSTITUTE

Inventor： Byong Jo HYON ,  YONGSU NOH ,  Sang Min PARK ,  DONGMYOUNG JOO ,  Daeyeon HWANG ,  poo reum JANG ,  Hyoung-Kyu YANG ,  JUN HYUK CHOI ,  Jin Hong KIM ,  Joon Sung PARK

IPC: H05K7/20 ,  H05K7/14

CPC classification number: H05K7/20409 ,  H05K7/14329 ,  H05K7/20145

Abstract: Provided is a power conversion system including a heat sink, a first heat emitter provided on an upper surface of the heat sink, a second heat emitter electrically connected to the first heat emitter and provided on a lower surface of the heat sink, a third heat emitter provided on one side of the heat sink and spaced apart by a predetermined distance from the heat sink, and a heat dissipation fan provided in a direction facing the third heat emitter based on the heat sink and spaced apart by a predetermined interval from the third heat emitter, wherein, during a normal operation, more heat is emitted by the first heat emitter than by the second heat emitter.

公开(公告)号：US20240195293A1

公开(公告)日：2024-06-13

申请号：US18528368

申请日：2023-12-04

Applicant: KOREA ELECTRONICS TECHNOLOGY INSTITUTE

Inventor： Dong Myoung JOO ,  Jun Hyuk CHOI ,  Joon Sung PARK ,  Jin Hong KIM ,  Byong Jo HYON ,  Yong Su NOH ,  Sang Min PARK ,  Dae Yeon HWANG ,  Hyoung Kyu YANG ,  Poo Reum JANG

IPC: H02M3/00 ,  H02M1/00 ,  H02M3/335

CPC classification number: H02M3/01 ,  H02M1/0009 ,  H02M1/0012 ,  H02M3/33573

Abstract: A circuit for preventing power imbalance of a resonance-type power converter is proposed. The circuit may include a rectifier converting input alternating current (AC) into direct current (DC) and frequency-controlled first and second resonant converter modules configured to receive an output voltage of the rectifier divided into two stages. The circuit may further include a controller outputting a first frequency command for controlling a frequency of a pulse width modulation (PWM) signal supplied to a switching element of a first switching unit of the first resonant converter module. The circuit may further include a frequency compensator compensating for the first frequency command and then outputting a second frequency command for controlling a frequency of a PWM signal supplied to a switching element of a second switching unit of the second resonant converter module, so as to eliminate power imbalance between the first and second resonant converter modules.

公开(公告)号：US20220018685A1

公开(公告)日：2022-01-20

申请号：US17136931

申请日：2020-12-29

Applicant: KOREA ELECTRONICS TECHNOLOGY INSTITUTE

Inventor： Jun Hyuk CHOI ,  Joon Sung PARK ,  Jin Hong KIM ,  Byong Jo HYON ,  Yong Su NOH ,  Dong Myoung JOO

IPC: G01D5/14 ,  F16C41/00 ,  G01D5/245

Abstract: This application relates to an absolute position detection device and detection method of a rotating body using a magnetic material. The device may include magnets coupled to a rotating body and configured to rotate together and having n pole pairs, wherein n is a natural number and (n+1) magnetic materials arranged adjacent to the magnets, spaced apart from each other by a predetermined interval, and configured to rotate together with the rotating body. The device may also include a first Hall sensor spaced apart from the magnets, installed to allow the magnetic materials to rotate in a space between the first Hall sensor and the magnets and configured to output a first signal based on the magnets when the magnetic materials approach the first Hall sensor. The device may further include a controller configured to measure an absolute position of the rotating body using the first signal.

公开(公告)号：US20220018684A1

公开(公告)日：2022-01-20

申请号：US17136624

申请日：2020-12-29

Applicant: KOREA ELECTRONICS TECHNOLOGY INSTITUTE

Inventor： Jun Hyuk CHOI ,  Joon Sung PARK ,  Jin Hong KIM ,  Byong Jo HYON ,  Yong Su NOH ,  Dong Myoung JOO

IPC: G01D5/14

Abstract: This application relates to an absolute position detection device and detection method of a rotating body. In one aspect, the device includes first row magnets coupled to a rotating body to rotate together and having n pole pairs, and second row magnets coupled to the rotating body to rotate together and having (n+1) pole pairs. The device also includes a first Hall sensor installed adjacent to the first row magnets and configured to detect a change in magnetism according to rotation of the first row magnets. The device further includes a second Hall sensor installed adjacent to the second row magnets and configured to detect a change in magnetism according to rotation of the second row magnets. The device further includes a controller configured to measure an absolute position of the rotating body using signals output from the first and second Hall sensors.