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Se-hyun Rhyu,Salman Khaliq,Chan-Wook Baek,Yeon-Chul Ha 한국자기학회 2020 Journal of Magnetics Vol.25 No.1
Magnetic couplings are considered suitable for many industrial applications where a separation is required between the driver and the driven. Utilizing magnetic couplings allows the transmission of torque without any mechanical contact. Generally, permanent magnets (PMs) are utilized in magnetic couplings instead of electromagnets to avoid extra circuitry. Accurate design and analysis of magnetic coupling are essential to reduce the PM volume for the required output performance. 3D finite element method (FEM) is considered the most accurate as it takes into account the end effects, which arises due to a shorter stack length as compared to the diameter of the coupling. In this paper, a permanent magnet coupling (PMC) is designed and optimized to be installed in a chemical pump that is handling high-temperature fluid. A prototype was also manufactured and tested in the laboratory to verify the analysis.
Dynamic Analysis of Double Excited 3-DOF Motor Modeling Using Equivalent Magnetic Circuit
Rhyu, Se-Hyun,Shin, Hye-Ung,Kim, Min-Soo,Kwon, Byung-Il The Korean Institute of Electrical Engineers 2015 Journal of Electrical Engineering & Technology Vol.10 No.3
This paper implements a model of a double excited three-degree-of-freedom motor (3-DOF) coupled with a PI current controller for position control. The rotational trends of the rotor according to the applied steps are identified using a motion equation. The simulation model is a complete electrical and mechanical model of a 3-DOF motor, which mainly consists of mechanical torque equations, a nonlinear equivalent magnetic circuit, and a PI current controller. This machine is tested using the manufactured control board using the same conditions as in the simulation, where the experimental results also verify the accuracy of the simulation results.
2-D modeling and characteristic analysis of a magnetic position sensor
Rhyu, Se-Hyun,Jung, In-Soung,Kwon, Byung-Il IEEE 2005 IEEE transactions on magnetics Vol.41 No.5
This paper presents the shape design of the permanent magnet for a rotary type magnetic position sensor for an automobile acceleration pedal using a new two-dimensional (2-D) analysis method. Basically, its flux path is not uniform in the axial direction because the magnetic flux flows three-dimensionally (3-D) between the stator yoke and permanent magnet. So, the analysis and design of the magnetic position sensor has to consider the 3-D shape. We propose a 2-D analytical modeling method of magnetic position sensor account for fringing effects and optimize the shape of the permanent magnet for a high linearity characteristic. Then, the validity of the developed method is confirmed by comparing the calculated values with the measured values.
Dynamic Analysis of Double Excited 3-DOF Motor Modeling Using Equivalent Magnetic Circuit
Se-Hyun Rhyu,Hye-Ung Shin,Min-Soo Kim,Byung-Il Kwon 대한전기학회 2015 Journal of Electrical Engineering & Technology Vol.10 No.3
This paper implements a model of a double excited three-degree-of-freedom motor (3-DOF) coupled with a PI current controller for position control. The rotational trends of the rotor according to the applied steps are identified using a motion equation. The simulation model is a complete electrical and mechanical model of a 3-DOF motor, which mainly consists of mechanical torque equations, a nonlinear equivalent magnetic circuit, and a PI current controller. This machine is tested using the manufactured control board using the same conditions as in the simulation, where the experimental results also verify the accuracy of the simulation results.
42V 자동차 EHPS용 BLDC 모터 개발에 관한 연구
류세현(Se-hyun Rhyu),김영균(Young-kyoun Kim),허진(Jin Hur),성하경(Ha-gyeong Sung) 대한전기학회 2007 대한전기학회 학술대회 논문집 Vol.2007 No.4
The increment of electric power demand causes interest on new higher power system such as 42V Power Net, and furthermore necessity for development of energy storage device is highlighted recently. Owing to high efficiency and easy speed control of brushless DC(BLDC) motor, the demand of BLDC motor that has high power and low noises are increasing. Especially demand of interior permanent magnet(IPM) type BLDC with high efficiency and high power in electric motion vehicle is increasing. This paper presents the design of the BLDC motor for EHPS(Electro-Hydraulic Power Steering) in 42V system and verified the characteristics by simulation and test results.