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：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.

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：US20140369385A1

公开(公告)日：2014-12-18

申请号：US14245202

申请日：2014-04-04

Applicant: Korea Electronics Technology Institute

Inventor： Joon Sung PARK ,  Se Hyun Rhyu ,  In Soung Jung ,  Jun Hyuk Choi ,  Bon Gwan Gu ,  Jin Hong Kim

IPC: G01K7/36

CPC classification number: G01K7/36 ,  G01K13/08

Abstract: The present disclosure relates to an apparatus and method for estimating a temperature of a motor using a Hall sensor. The method includes detecting, at a digital Hall sensor, a position of a rotor included in a motor and outputting an on signal in an operating period and an off signal in a release period according to a relative position of the rotor, calculating, at a temperature determining module, a difference between duration of the operating period and duration of the release period according to an output waveform of the digital Hall sensor, and then determining, at the temperature determining module, a temperature of the motor with reference to a temperature corresponding to the duration difference. Accordingly, it is possible to estimate the internal temperature of a motor without installing a temperature sensor in the motor, to maintain a small size of the motor, and to reduce production costs.

Abstract translation: 本公开涉及一种使用霍尔传感器来估计电动机的温度的装置和方法。 该方法包括在数字霍尔传感器处检测包括在电动机中的转子的位置，并根据转子的相对位置在运行期间输出接通信号和释放期间的关闭信号，在 温度确定模块，根据数字霍尔传感器的输出波形，操作周期的持续时间和释放周期的持续时间之间的差，然后在温度确定模块处，参考相应的温度来确定电动机的温度 到持续时间差。 因此，可以在不在电动机中安装温度传感器的情况下估计电动机的内部温度，以保持电动机的小型化并降低生产成本。