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비상 제동기능을 가지는 자력을 이용한 조작기 브레이크 시스템(MABS)에 대한 자계 및 동작특성 해석
강종호(Jongho Kang),신동규(Dongkyu Shin),정현교(Hyunkyo Jung) 한국자동차공학회 2004 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
This paper formulates the principle of the magnetic actuator break system (MABS) for emergency situation driving a car. When the exciting break system of a car is broken, MABS will be able to stop the car by the electric system. MABS controls the rotating wheel to slow down gradually while holding and laying the wheel down several ten times per second. We present the magnetic field and dynamic behavior analyses for the magnetic actuator break system using finite element method (FEM) associated with parameter, for calculating the displacement of the moving parts and the supplying current.
농용 다목적 차량용 영구자석 전동기의 설계에 관한 연구
서정무(Jungmoo Seo),김정환(Junghwan Kim),김영균(Youngkyun Kim),정인성(Insoung Jung),정현교(HyunKyo Jung) 한국자동차공학회 2011 한국자동차공학회 부문종합 학술대회 Vol.2011 No.5
This paper presents a design of permanent magnet synchronous motor for agricultural utility vehicle. Based on the output characteristics of conventional diesel vehicle, required speed and torque are derived and motor specification is determined. In order to evaluate demagnetization behavior in driving condition, operating points of permanent magnet at a critical point are evaluated using magnetic field and flux density calculation. The manufactured motor is tested and compared with the simulated results.
Conceptual Design of HTS Magnet for a 5 MJ Class SMES
Myungjin Park,Sangyeop Kwak,Wooseok Kim,Jikwang Lee,Jinho Han,Kyeongdal Choi,Hyunkyo Jung,Joonhan Bae,Seokho Kim,Kiduk Sim,Haejong Kim,Kichul Seong,Songyop Hanh IEEE 2008 IEEE transactions on applied superconductivity Vol.18 No.2
<P>Superconducting magnetic energy storage (SMES) systems with High Temperature Superconducting (HTS) wires have been actively developed world-wide. A 600 kJ class SMES with Bi-2223 HTS wire has been in development as a national project since 2004 and is currently approaching the final testing stage of the first of three phases. In the second phase of the project, several MJ class HTS SMES will be developed. In this paper, designs of magnets for 5 MJ class SMES with DI-BSSCO and YBCO coated conductor are presented and compared.</P>
Design of HTS Magnets for a 2.5 MJ SMES
Sangyeop Kwak,Seyeon Lee,Sangyeop Lee,Woo-Seok Kim,Ji-Kwang Lee,Chan Park,Joonhan Bae,Jung-Bin Song,Haigun Lee,Kyeongdal Choi,Kichul Seong,Hyunkyo Jung,Song-yop Hahn IEEE 2009 IEEE transactions on applied superconductivity Vol.19 No.3
<P>A 600 kJ HTS SMES system has been developed for power system stabilization as a national project in Korea. Successful operating tests of the 600 kJ were recently completed. In this paper, a 2.5 MJ class SMES with HTS magnets of single solenoid, multiple solenoid and modular toroid type were optimized using a recently developed multi-modal optimization technique named multi-grouped particle swarm optimization (MGPSO). The objective of the optimization was to minimize the total length of HTS superconductor wires satisfying some equality and inequality constraints. The stored energy and constraints were calculated using 3-D magnetic field analysis techniques and an automatic tetrahedral mesh generator. Optimized results were verified by 3D finite element method (FEM).</P>
The Optimal Design of 600 kJ SMES Magnet Based on Stress and Magnetic Field Analysis
Sangyeop Kwak,Myungjin Park,Wooseok Kim,Seungyong Hahn,Seungwook Lee,Jikwang Lee,Kyeongdal Choi,Jinho Han,Joonhan Bae,Seokho Kim,Kiduk Sim,Haejong Kim,Kichul Seong,Hyunkyo Jung,Songyop Hahn IEEE 2008 IEEE transactions on applied superconductivity Vol.18 No.2
<P>In the development of large scale superconducting magnetic energy storage (SMES) systems, the problem of mechanical stresses induced in the windings by Lorentz force becomes more critical as dimensions of system and magnetic field increase. In this paper, an optimal design process of a 600 kJ SMES magnet combined with mechanical stress analysis is presented. A stress analysis method based on electromagnetic finite element analysis (FEA) is explained in detail. The results of the analysis led to the development of an optimum design, electro-magnetically and mechanically, of a single-pole double pancake coil (DPC) type 600 kJ SMES magnet. The stress in each DPC are described along with recommendations for winding tension in the manufacturing process to minimize radial and hoop stress in each DPC.</P>