• Title/Summary/Keyword: High-speed train position

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Design of Position Estimator for Propulsion Inverter Driving Long Stator LSM in High Speed Maglev

  • Jo, Jeong-Min;Lee, Jin-Ho;Han, Young-Jae;Lee, Chang-Young
    • Journal of international Conference on Electrical Machines and Systems
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    • v.3 no.3
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    • pp.252-255
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    • 2014
  • In the case of long-stator linear drives, unlike rotative drives for which speed or position sensors are a single unit attached to the shaft, these sensors extend along the guideway. The position signal transmitted from maglev vehicle can't meet the need of the real-time propulsion control. In this paper the position estimator for propulsion inverter driving long stator linear synchronous motor (LSLSM) in high speed maglev train is proposed. In order to get the higher resolution of the position information transmitted from vehicle, Full order state observer is proposed for position estimator.

Propulsion Control of a Small Maglev Train with Linear Synchronous Motors (선형 동기 전동기가 있는 축소형 자기부상열차의 추진 제어)

  • Park, Jin-Woo;Kim, Chang-Hyun;Park, Doh-Young
    • Proceedings of the KSR Conference
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    • 2011.10a
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    • pp.1838-1844
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    • 2011
  • In this paper, the propulsion control of a high-speed maglev train is studied. Electromagnetic suspension is used to levitate the vehicle, and linear synchronous motors (LSM) are used for propulsion. In general, a low-speed maglev train uses a linear induction motor (LIM) for propulsion that is operated under 300[km/h] due to the power-collecting and end-effect problem of LIM. In case of the high-speed maglev train over 500[km/h], a linear synchronous motor (LSM) is more suitable than LIM because of a high-efficiency and high-output properties. An optical barcode positioning system is used to obtain the absolute position of the vehicle due to its wide working distance and ease of installation. However, because the vehicle is working completely contactless, the position measured on the vehicle has to be transmitted to the ground for propulsion control via wireless communication. For this purpose, Bluetooth is used and communication hardware is designed. A propulsion controller using a digital signal processor (DSP) in the ground receives the delayed position information, calculates the required currents, and controls the stator currents through inverters. The performance of the implemented propulsion control is analyzed with a small maglev train which was manufactured for experiments, and the applicability of the high-speed maglev train will be explored.

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Braking Performance Analysis and Inspection of High Speed Train (고속철도 차량의 제동성능해석 및 검증)

  • Lee, Sung-Ho;Kim, Young-Kuk;Kim, Seog-Won;Park, Jin-Bae
    • Proceedings of the Korean Society for Noise and Vibration Engineering Conference
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    • 2006.05a
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    • pp.982-987
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    • 2006
  • In general, the braking system of high speed train has an important role for the safety of the train. To stop safely the train at its pre-decided position, it is necessary to combine property the various brakes. Generally high speed train has adopted a combined electrical and mechanical (friction) braking system. Electrical brakes are consist of rheostatic brake, regenerative brake and eddy current brake and mechanical brakes are composed of disc brake, wheel disc brake and tread brake. In this paper, we introduce braking performance analysis and inspection though simulation and research to reduce braking distance.

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Investigation of noise source localization on High speed train (고속철도 소음원의 위치규명에 관한 고찰)

  • Koh, Hyo-In;You, Won-Hee;Lee, Jun-Seok
    • Proceedings of the KSR Conference
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    • 2007.05a
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    • pp.1590-1597
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    • 2007
  • This paper deals with the noise source localization of the Korean High Speed Train (KTX) at the speed of 300 km/h. Using Microfonarray system and beamforming technology typical pass-by noise sources and their frequency characteristics are investigated. It is primarily aimed at investigating the location and characteristics of the high speed train emission. The results from the microphone array tests are also analyzed in relation to the remarks from analytic studies and experimental investigations on the high speed train that have been done with the intention of understanding the interior noise mechanism. The acoustical image shows the low frequency noise sources mainly at the position of the under part of the train at high speeds and the related source mechanism are discussed.

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A study on the Characteristics of Braking for High Speed Train through On-line Test (시운전시험을 통한 고속철도 차량의 제동 특성에 관한 연구)

  • 김석원;김영국;박찬경;목진용
    • Proceedings of the Korean Society for Noise and Vibration Engineering Conference
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    • 2004.05a
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    • pp.212-217
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    • 2004
  • In general, the braking system of high speed train has an important role for the safety of the train. To stop safely train at its pre-decided position, it is necessary to combine properly the various brakes. The prototype of Korean high speed train (KHST) has been designed, fabricated and tested by the domestic researchers. It has adopted a combined electrical brakes, such as rheostatic brake, regenerative brake and eddy current brake, and mechanical brakes composed of disc brake, wheel disc brake and tread brake. In this paper, the performances and control algorithms of braking system have been reviewed by the experimental method.

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A Study on Radion Frequency of the Transponder System for High-speed and High-precision Train Location Detection (고속열차 위치검지를 위한 트랜스폰더 시스템 운용 주파수 연구)

  • Ahn, Il-Yeop;Sung, Nak-Myoung;Kim, Jaeho;Choi, Sung-Chan
    • The Transactions of The Korean Institute of Electrical Engineers
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    • v.66 no.1
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    • pp.237-242
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    • 2017
  • This paper presents development of the transponder system which provides an accurate train position, especially for supporting 400km/h high speed train. Here, we analyzed an operating frequency band of the transponder system which can be interoperable with the Eurobalise system already installed in Korea railroad as to be used for the automatic train protection (ATP). By investigating the power frequency band and its data frequency band of the transponder system, we presents the adoptable frequency band for the developed transponder system. Additionally, through the real testbed using HEMU-430X, we evaluate its performance requirement and shows interoperable operation with the Eurobalise system.

Field Test of High-Speed Transponder System for Rail Transport (철도교통용 고속 트랜스폰더시스템 실차 시험)

  • Park, Sungsoo;Kim, Seong Jin;Lee, Jae-Ho
    • The Transactions of The Korean Institute of Electrical Engineers
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    • v.65 no.1
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    • pp.208-213
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    • 2016
  • In order to detect the exact position of high-speed train, it is necessary to obtain location information from the transponder tag installed along the track. When the transponder tag receives the energizing signal from the train, it sends a telegram to the reader, which includes location information. In high-speed railway environment, this telegram can be corrupted by electromagnetic interference caused by onboard electric train power equipments or wayside devices. In order to assess the performance of transponder system under this harsh environment, we carried out field test using HEMU-430X. Field test results are briefly introduced and discussed for the evaluation of the transponder system under development.

Development of a Train Performance Simulation S/W for The Performance Analysis of High Speed Railway System(2) (고속전철 시스템 성능해석을 위한 열차 주행시뮬레이션 S/W 개발(2))

  • Lee, Tae-Hyung;Hyun, Seung-Ho;Chung, Heuing-Chai;Hwang, Hee-Soo
    • Proceedings of the KIEE Conference
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    • 2000.07b
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    • pp.1381-1383
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    • 2000
  • A multi-train operation simulation software is under development, in this G7 Project for a High Speed Train System, to simulate the running performance, power consumption, signalling and operation. In the first stage, a Train Performance Simulation (TPS) software is introduced in this paper. This is a core module of whole system and gives some parameters of a train, e.g., its position, speed traction and braking power and electric power system state, etc. In this paper, calculation technique was used for voltage drop at the train's positions and major posts along the catenary line. The final program will be used as an evaluation tool for system performance in constructing a new line or introducing a new train system.

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Analysis for Main Properties of basic characteristic of HEMU-400x (차세대 고속전철시스템 주요기술 특성 분석)

  • Park, Choon-Soo;Choi, Sung-Hoon;Han, In-Soo;Kim, Sang-Soo;Lee, Tae-Hyung;Kim, Ki-Whan
    • Proceedings of the KSR Conference
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    • 2009.05b
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    • pp.173-179
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    • 2009
  • High-speed railway is important transportation in the world because it has a lot of merits like as very comfortable, environmental benefits, energy savings, etc. The increase of demand for high-speed railway influence to develop of new hish-speed trains. Many countries introduced new high-speed train in the market and it meets to the market's needs. They adopt new technology and systems like that active suspension, synchronous permanent magnetic motor, distributed drive system, aero acoustics, etc. In Korea, the project for R&D of new high-speed train is launched in 2007. We need analysis for main properties of new high-speed train(HEMU-400x). This paper presents the comparisons, analyzed characteristics of main properties like as traction system and braking system. In this analysis, we can know our technical position in the world and what is important to focus on the development. It is very useful to develop a next generation high-speed train in Korea.

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Experimental verification of the brake performance analysis for the high speed train (고속철도 차량의 제동성능 해석에 대한 실험적 검증)

  • Kim, Young-Guk;Kim, Seog-Won;Park, Chan-Kyeong;Lee, Sung-Ho;Park, Tae-Won
    • Journal of Sensor Science and Technology
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    • v.16 no.1
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    • pp.68-76
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    • 2007
  • In general, the braking system of a high speed train has an important role for the safety of the train. To stop safely the train at its pre-decided position, it is necessary to properly combine the various brakes. The train has adopted a combined electrical and mechanical (friction) braking systems. In order to design a good brake system, it is essential for designers to predict the brake performance. In this paper, the braking performance analysis program has been developed and verified by comparing the simulation results with the brake test results of HSR-350x; both results match very well. Also, the brake performances of high speed trains can be predicted by using this program under various conditions.