• Title/Summary/Keyword: high speed

Search Result 19,661, Processing Time 0.042 seconds

Overview and Implication of Technical Trend of New High-speed Train in the World (세계 고속열차 기술개발 동향과 시사점)

  • Park, Choon-Soo;Kim, Ki-Whan;Kim, Sang-Soo
    • Proceedings of the KSR Conference
    • /
    • 2008.06a
    • /
    • pp.862-867
    • /
    • 2008
  • High-speed railway is important transportation in the world because it is 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. 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 last year. We need analysis of technical trend of new high-speed trains in the world. This paper presents a overview of technical trend of new high speed trains and what is key issues in development of high-speed train. It is very useful to develop a next generation high-speed train in Korea.

  • PDF

A Study on Characteristics of Feed Drive System using High Speed Ballscrew (고속볼스크류를 사용한 이송계 특성에 관한 연구)

  • 박성호
    • Proceedings of the Korean Society of Machine Tool Engineers Conference
    • /
    • 2000.04a
    • /
    • pp.279-284
    • /
    • 2000
  • It can be acquired the high effective productivity through of high speed, precision of machine tools, and then, machine tools will be got a competitive power. Industrially advanced countries already developed that the high speed feed is 60m/min using the high speed ball screw. Also, a lot of problems have happened the feed drive system. It is necessary to study about the character of positioning accuracy, heat generation and high speed control for feed drive system of high speed. in this study, we make use of the feed drive system with a high lead ball screw. We'll develop the feed drive system at the speed of 60m/min. Using the design of the mechanical element and the high speed control, the basic design concept can be established. After manufacturing one-shaft feed drive system and then conducting the performance test, It'll be analyzed properties of the high speed feed drive system.

  • PDF

Multiplexer as selector to select different speed (Normal speed, High speed and Super high speed) to display CAR at different speed to color TV system

  • Adhikari, Ganesh
    • International Journal of Advanced Culture Technology
    • /
    • v.10 no.3
    • /
    • pp.332-338
    • /
    • 2022
  • The article presents a concept of designing a Multiplexer circuit which acts as a "Selector" and that becomes capable to select different speed created at different TTL Gate configurations; Standard TTL(Normal Speed), High Speed TTL(High Speed), Schottky TTL(Super High Speed) and further connect the selected Gate speed to the CAR shape created using C-Programming at Computer Graphics and finally CAR shape display at different speed to the color TV. The Multiplexer supporting efficient and more reliable selection criteria using "Logical based selection criteria" and further the output from multiplexer is provided to CAR shape created using c-programming and finally CAR shape is display to color TV system. Basic purposes and assumptions regarding the design and development of this system as well as a description of its operation have been presented.

Design of high speed feed drive system in machine tools (고속화를 위한 공작기계 이송계의 설계)

  • 고해주;박성호;정윤교
    • Proceedings of the Korean Society of Machine Tool Engineers Conference
    • /
    • 1999.05a
    • /
    • pp.39-44
    • /
    • 1999
  • It can be acquired the high effective productivity through of high speed, precision of machine tools, and then, machine tools will be got a competitive power. Industrially advanced countries already developed that the high speed feed is 60m/min using the high speed ball screw. Also, a lot of problems have happened the feed drive system. It is necessary to study about the character of positioning accuracy, heat generation and high speed control for feed drive system of high speed. In this study, we make use of the feed drive system with a ball screw of large-scale-lead. We'll develop the feed drive system at the speed of 60m/min. Using the design of the mechanical element and the high speed control, the basic design concept can be established. After manufacturing one-shaft feed drive system and conducting the performance test, it'll be analyzed properties of the high speed feed drive system.

  • PDF

Analysis on the Characteristics of the Ride Comfort for High Speed Trains on the High Speed Line/conventional Line (고속선/기존선 운행에 따른 고속철도 차량의 승차감 특성 분석)

  • 김석원;박찬경;김기환;박태원;김영국
    • Transactions of the Korean Society for Noise and Vibration Engineering
    • /
    • v.14 no.10
    • /
    • pp.999-1006
    • /
    • 2004
  • Recently, the ride comfort problem becomes increasingly important because of today's needs for train speedup. The railway has the track irregularities which cause vibrations, such as rail joints, turnout, level crossing, transition corves and super-elevation ramps, and variations in the track level(z-axis) and the gauge(y-axis). In Korea, the service run of the high speed train has been made since the 1st of April, 2004. The commercial high-speed trains must be run on the compound lines which are composed of high-speed line and conventional line. The high speed lines in both Kyoungbu line and Honam line have 57.5% and 33.8%, respectively In this Paper, the ride comfort has been reviewed by the various experimental methods when the high-speed trains are operated on both Kyoungbu line and Honam line. The results show that the high-speed train has no problems from the viewpoint of the comfort ride during the operation on the high speed line and conventional line.

A study on Processing technology of high-speed and high-accuracy for Metal Mold Cutting (금형가공을 위한 고속.고정도 가공기술의 연구)

  • 박희영
    • Proceedings of the Korean Society of Machine Tool Engineers Conference
    • /
    • 1999.10a
    • /
    • pp.221-226
    • /
    • 1999
  • It can be acquired the high effective productivity through of high speed, precision of machine tools, and then, machine tools will be got a competitive power. Industrially advanced countries already developed that the high speed feed is 50m/min using the high speed ball screw. Also, a lot of problems have happened the feed and servo drive system. It is necessary to study about the character of positioning accuracy, heat generation and high speed/accuracy control for feed/servo drive system of high speed/accuracy. In this study, we make use of high performance vertical machine center with a ball screw of large-scale-lead. Also, we'll apply the high-speed/accuracy control technology in this part of feedforward control, multi-buffering block size, etc. Using the design of the mechanical element and high-speed precision control, the basic design concept can be established.

  • PDF

State-of-the-Art on the Indoor-Noise Characteristics of High Speed Train (고속전철의 실내소음특성에 관한 연구현황분석)

  • 이우식;박철희
    • Journal of the Korean Society for Railway
    • /
    • v.2 no.3
    • /
    • pp.18-25
    • /
    • 1999
  • A high speed train named Korean High Speed Train (KHST) with its maximum operating speed 350 km/h is now under development. For the successful design of a quiet and comfortable high speed train, it is important to understand the general features of the noise and vibration characteristics of high speed train. This paper reviews extensively collected materials on the noise and vibration characteristics of existing high speed trains. Based on the noise and vibration characteristics of TGV systems, a simple indoor-noise prediction rule is proposed for the TGV-type high speed trains such as KHST The indoor-noise of KHST at 350km/h is expected to be larger than at least 71 dBA. Some important researches conducted for designing KHST during last two years under the G-7 project are also briefly introduced at the last part of this paper.

  • PDF

A Study on the Countermeasures for Accreted Snow and Ice on Seoul-Busan High-speed Line Considering the Climate Condition (겨울철 기후조건을 고려한 경부고속선 설빙대책 수립방안 연구)

  • Han Jin-Seok;Kwon Hycok-Bin
    • Proceedings of the KSR Conference
    • /
    • 2004.10a
    • /
    • pp.302-307
    • /
    • 2004
  • When trains run over a snow-covered track at high speed, the snow accereted under car bodies may drop during train running. The dropped snow/ice lumps scatter the ballast on the track damaging the car body and the environment along the track in snowy regions. In this study, the snow-fall condition in winter around the Seoul-Busan high-speed line has been investigated to yield the countermeasure for the high-speed line. The climate near Japanese and French high-speed line as well as the relationship between the climate and countermeasure has also been investigated and the direction of countermeasure for Seoul-Busan high-speed line has been deduced. Consequently, the amount and frequency of snow-fall near Seoul-Busan high-speed line is less than that of Japan and France, so the speed restriction could be the fundamental countermeasure for Seoul-Busan high-speed line, and additional measure on rolling stock and infrastructure should be followed.

  • PDF

Design and Experimental Investigation of High-Speed Three-Phase Induction Motor for Turbo Blower

  • Kim, Young-Kwan;Lee, Ju
    • Journal of the Korean Institute of Illuminating and Electrical Installation Engineers
    • /
    • v.22 no.3
    • /
    • pp.59-65
    • /
    • 2008
  • High-speed electrical motor has been studied for several applications, i.e. for direct-drive systems of centrifugal compressors and turbo blowers. This paper deals with a design consideration of electromagnetic, mechanical and thermal limits of high-speed induction motor for turbo blower. Basic design concept of high-speed motor was proposed. As the motor is to be operated at high speed, the losses are quite different from conventional low-speed machines. Especially, the increases of rotor eddy current and friction losses could lead to an overheated motor. So, we suggested a special cooling system to reduce temperature rise. And, based upon this design concept, the prototype induction motor(37[kW], 45,000[rpm]) for high-speed turbo blower was designed and 2-D electromagnetic field analysis was implemented. Finally, criteria to evaluate the characteristics of high-speed induction motor have been proposed and tested.

Speed-raising of the Existing Railway and the High-speed Railway in the Future

  • Xiang Dingyuan;Li Jia
    • Proceedings of the KOR-KST Conference
    • /
    • 1998.09a
    • /
    • pp.17-24
    • /
    • 1998
  • The article expounds that the speed competition is the motive force of each transportation means. It also analyzes the current condition of the speed of Chinese railways. The developing strategy for Chinese railway is to raise the speed of the existing lines as a primary step and to construct the high-speed railway in selected sections concurrently, which proved that constructing high-speed railway in Beijing-Shanghai area is the best choice.

  • PDF