• Title/Summary/Keyword: Magnetic levitation

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Behavior of Concrete Track Girder for Magnetic Levitation Train (자기부상열차구조물에 있어서 콘크리트선로거더의 거동)

  • Kang Bo-Soon
    • Proceedings of the KSR Conference
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    • pp.686-691
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    • 2005
  • State of the art and current issues related with the RC and PSC structure system for the magnetic levitation train were investigated. The German and China magnetic levitation train adopted a new kind of a structure to enable high-speed transportation, which allows the use of the space over a ground. The loading from magnetic levitation trains is light-weight compared with a regular train due to load distribution to a supporting structure. Therefore, the magnetic levitation train is considered an economical and efficient transportation system, and is also an environmentally-sustainable structure. In this paper, the structural design and construction technology specific to a magnetic levitation train were discussed, and structural considerations related with an actual operation of the train were pointed out. In addition, the future research area of a magnetic levitation train was proposed

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Magnetic Levitation System of High Tc Superconductor (초전도 자기부상 시스템)

  • Lee, Sang-Heon
    • The Transactions of the Korean Institute of Electrical Engineers C
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    • v.55 no.4
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    • pp.213-216
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    • 2006
  • The magnetic levitation effect a high Tc superconductor beneath the toroidal permanent magnet was examined by means of a improved magnetic seesaw method. Magnetic effects associated with penetration and pinning in superconductor. One of these was focussing of magnetic field by superconductor and the other was magnetic levitation. The existence of equilibrium was shown to be related to hysteresis observed in the force separation for a toroidal permanent magnet and superconductor. Obtained results indicate that magnetic levitation effect in the present case was mainly due to diamagnetic effect.

Development of Levitation Control for High Accuracy Magnetic Levitation Transport System (초정밀 자기부상 이송장치의 부상제어기 개발)

  • Ha, Chang-Wan;Kim, Chang-Hyun;Lim, Jaewon
    • Journal of Institute of Control, Robotics and Systems
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    • v.22 no.7
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    • pp.557-561
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    • 2016
  • Recently, in the manufacturing process of flat panel displays, mass production methods of inline system has been emerged. In particular the next generation OLED display manufacturing process, horizontal inline evaporation process has been tried. It is important for the success of OLED inline evaporation process to develop a magnetic levitation transport system capable of transferring a carrier equipped with a mother glass with high accuracy without any physical contact along the rail under vacuum condition. In the case of existing wheel-based transfer system, it is not suitable for OLED evaporation process requiring high cleanliness. On the other hand, the magnetic levitation transport system has an advantage that it does not generate any dust and it is possible to achieve high-precision control because there are not non-linear factors such as friction force. In this paper, we introduce the high-precision magnetic levitation transport system, which is currently under development, for OLED evaporation process.

A Study on the Gap Estimation Circuit Design of the Magnetic Levitation System (자기 부상계의 변위추정 회로설계에 관한 연구)

  • Kim, C.H.;Ha, Y.W.;Sim, S.H.;Yang, J.H.
    • Journal of Power System Engineering
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    • v.1 no.1
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    • pp.144-153
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    • 1997
  • The magnetic levitation system is utilized in the magnetic bearing of high-speed rotor because of little friction, no lubrication, no noise and so on. The magnetic levitation system need the feedback controller for the stabilization of system, and gap sensors are generally used to measure the gap. The use of gap sensors brings out the increase of the number of troublesome, and the decrease of the control performance because of the dislocation between the measurement point and the control point. This paper presents the design of the gap estimation circuit for the sensorless method proposed by authors in the magnetic levitation system. We made the gap estimation circuit which was composed of both the superposition circuit and the measuring circuit. And we investigated the validity of the usefulness of the proposed sensorless method in the magnetic levitation system through results of actual experiment.

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Design of Hybrid Type Levitation and Propulsion System for High-Speed Maglev (초고속 자기부상열차를 위한 하이브리드형 부상 추진 시스템 설계)

  • Cho, Han-Wook;Han, Hyung-Suk;Lee, Jong-Min;Kim, Bong-Sup;Rho, Kyu-Suk;Kim, Dong-Sung
    • Proceedings of the KIEE Conference
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    • pp.94-96
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    • 2009
  • This paper deals with the design considerations of electro-magnet (EM)-permanent magnet (PM) hybrid levitation and propulsion device for magnetically levitated (maglev) vehicles. Several design considerations such as machine structure, manufacturing, and control strategy are described. In order to verify the design scheme and feasibility of control strategy, dynamic test set is implemented and tested.

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A Study on the Design of Robust Simulation Controller of Magnetic Levitation System(I) (자기부상 시스템의 강인한 제어기 설계에 관한 연구(I) -시뮬레이션을 중심으로-)

  • 양주호;김창화;정석권;김영복
    • Journal of Advanced Marine Engineering and Technology
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    • v.19 no.3
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    • pp.84-90
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    • 1995
  • The magnetic levitation system has great advantages, such as little friction, no lubrication no noise and so on. The magnetic levitation system need a stabilizing controller because it is a unstable system in natural. This paper presents the robust stabilizing controller design of the magnetic levitation system. The controller which is designed in this paper by $H_{infty}$ control theory is robust servo controller which has zero offset in spite of the model uncertainties. The validity of controller was investigater through the response simulation. In the future, we will use the result of this study at the actual magnetic levitation system.

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A Study on the Sensorless Realization of Magnetic Levitation System (자기 부상계의 센서리스 실현에 관한 연구)

  • 김창화;정병건;양주호
    • Journal of KSNVE
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    • v.8 no.1
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    • pp.195-203
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    • 1998
  • The magnetic levitation system is utilized in the magnetic bearing of high-speed rotor because of little friction, no lubrication, no noise and so on. The magnetic levitation system need the feedback controller for the stabilization of system, and gap sensors are generally used to measure the gap. The use of sensor easily goes into troublesome caused by sensor failure discord between the measurement point and the control point etc. This paper presents the design of robust stabilizing contoller by $H_{\infty}$ control theory using the sensorless method proposed by authors in the magnetic levitation system. And we investigated both the validity of the designed controller and the usefulness of the sensorless magnetic levitation system through results of actual experiment.

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Study on Dynamic Analysis of Magnetic Levitation Vehicles (자기부상열차의 동적 해석 연구)

  • 한형석;조흥제;김대진
    • Proceedings of the KSR Conference
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    • pp.218-225
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    • 1999
  • Dynamic analysis of the magnetic levitation vehicle UTM01 is studied using the multibody dynamic analysis program DADS. The magnetic levitation force is defined and incorporated into DADS through the user-defined subroutines of DADS. The vehicle with bogies is modeled in 3 dimension. The developed vehicle model with magnetic nodules is analyzed for two rail profiles. The results show that the presented method is applicable to magnetic levitation vehicles.

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Novel Cylindrical Magnetic Levitation Stage for Rotation as well as Translation along Axles with High Precisions (고정밀 회전 및 축방향 이송을 위한 신개념 원통형 자기부상 스테이지)

  • Jeon, Jeong-Woo;Caraiani, Mitica;Lee, Chang-Lin;Jeong, Yeon-Ho;Kim, Jong-Moon;Oh, Hyeon-Seok;Kim, Sungshin
    • The Transactions of The Korean Institute of Electrical Engineers
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    • v.61 no.12
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    • pp.1828-1835
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    • 2012
  • In this paper, a conceptual design and a detailed design of novel cylindrical magnetic levitation stage is introduced. This is came from planar-typed magnetic levitation stage. The proposed stage is composed of cylinder-typed permanent magnet array and semi-cylinder-typed 3 phase winding module. When a proper current is induced at winding module, a magnetic levitation force between the permanent magnet array and winding module is generated. The proposed stage can precisely move the cylinder to rotations and translations as well as levitations with the magnetic levitation force. This advantage is useful to make a nano patterning on the surface of cylindrical specimen by using electron beam lithography under vacuum. Two methods are used to calculate required magnetic levitation forces. The one is 2D FEM analysis, the other is mathematical modeling. This paper shown that results of two methods are similar. An assistant plate is introduced to reduce required currents of winding module for levitations in vacuum. The mathematical model of cylindrical magnetic levitation stage is used for dynamic simulation of magnetic levitations. A lead-lag compensator is used for control of the model. Simulation results shown that the detail designed model of the cylindrical magnetic levitation stage with the assistant plate can be controlled very well.