• 제목/요약/키워드: Railway vehicle

검색결과 672건 처리시간 0.166초

철도차량기지용 단권변압기의 전압강하에 대한 이론적 고찰 (A Theoretical Study on Voltage Drop of Auto-Transformer for Railway Vehicle Base)

  • 유기성;김재문
    • 전기학회논문지
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    • v.67 no.12
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    • pp.1723-1728
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    • 2018
  • In order to investigate the voltage drop compensation effect of AT for domestic railway vehicle base, the parameters of AT voltage drop of railroad car base are Z3 (Impedance of feeder line), Xn ( Distance from railroad vehicle to AT to SS), and Dn (distance between both ATs of railway vehicle).In addition, when installed in a SSP for a railway vehicle base, there is no AT and feeder line in the railway vehicle base except for the SSP for the main line and the SSP for the railway vehicle base, so that if zero or ignored, the AC single-phase two- It can be confirmed that it becomes a form.

Preliminary Design and Development Framework of Railway Vehicle Simulator for Engineering Evaluation Analysis

  • Kim, Hong-Chan;Kim, Jeung-Tae
    • International Journal of Railway
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    • v.4 no.1
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    • pp.5-11
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    • 2011
  • The purpose of the present study is to develop conceptual design of a railway vehicle simulator based on a scaled model. Although the scaled simulator is limited in its ability to manipulate the full dynamics of a full-size railway vehicle, it has been known to have an advantage in that it could provide means of testing the fundamental dynamic behavior within a limited laboratory space and at low operation cost. The present study proposes a design strategy for a simulator so that a small scaled roller rig could be fabricated and operated in laboratory setting based on the design philosophy. The data obtained from experimental testing using a scale model can be used to verify and interpret the dynamic performance of full-scale railway vehicle by applying appropriate non-dimensional analysis.

자동운전 도시철도차량의 운전특성을 고려한 절연구분장치 이론적 고찰 (Theoretical Study of Neutral Section Considering the Driving Characteristics of ATO Urban Railway Vehicle)

  • 이재봉;김재문
    • 전기학회논문지
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    • v.62 no.10
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    • pp.1470-1474
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    • 2013
  • In this paper, proper length of neutral section and neutral section system configuration is proposed to minimize accidents if ATO urban railway vehicle stops maintaining the leading vehicles in air section at regular intervals. When considering the minimum voltage sensing of power conversion unit in the urban railway vehicle, the effective length of 14,280[mm] with neutral section can be minimized damage due to high current because the urban railway vehicle is very little present chance compare neutral section with pantograph interval installed on a unit vehicle. In addition, uplift of catenary line and contact wire consider to minimize damage. The result of theoretical review, as the proposed neutral section shorter, isolated neutral section is effective than the integrated neutral section.

철도차량 접촉기의 신뢰성 분석 및 교환주기 결정에 대한 연구 (A Study on Reliability Analysis & Determination of Replacement Cycle of the Railway Vehicle Contactor)

  • 박민흥;이세헌
    • 한국신뢰성학회지:신뢰성응용연구
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    • v.17 no.4
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    • pp.316-324
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    • 2017
  • Purpose: The purpose of this study is to determine the replacement cycle applied age replacement policy by reliability analysis based on railway vehicle contactor's failure history data. Method: We performed reliability analysis based on railway vehicle contactor's failure history data. We found a suitable distribution by goodness of fit test and predicted the reliability through estimation of scale & shape parameter. Considering cost information we determined the replacement cycle that minimize the opportunity cost. Result: Suitable distribution was the Weibull and scale parameter & shape parameter are estimated by reliability analysis. The replacement cycle was predicted and MTTF, $B_6$ percentile life were suggested additionally. Conclusion: We confirmed that failure rate type of railway vehicle contactor is degradation model having a time dependent characteristic and examined the replacement cycle in our country's operating environment. We expect that this study result contribute to railway operation agency for maintenance policy decision.

AC 및 DC 전력공급구간 운전을 위한 도시철도용 추진제어시스템의 구조 및 제어 알고리즘 개발 (Development an Structure and Control Algorithm of Propulsion Control for Driving Railway Vehicle in Both AC and DC Power Supply Section)

  • 이창희;이주
    • 전력전자학회논문지
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    • v.24 no.2
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    • pp.84-91
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    • 2019
  • This study proposes a AC/DC railway vehicle control algorithm that enables simultaneous driving of AC and DC power supply sections. In the Seoul metropolitan region, trolley voltage for railway vehicle is divided into AC and DC power supplies. Therefore, AC/DC railway vehicle algorithm is essential for driving on the outskirts of the region. This study analyzes resonance and beat phenomena for simultaneously running in AC and DC power supply sections, and proposes a control algorithm for railway vehicles with the application of damping and beatless controls based on this analysis. The performance of the proposed algorithm is verified by simulation and analysis of actual driving results.

진동을 이용한 철도차량의 무게중심과 관성모멘트 현장 측정 (Field Measurement of the Center of Gravity and the Moment of Inertia of Railway Vehicles Using Vibration)

  • 송기석;최연선
    • 한국소음진동공학회논문집
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    • v.23 no.10
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    • pp.878-884
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    • 2013
  • The center of gravity and the moment of inertia of railway vehicles are important parameters for running safety and stability in railway vehicle design. However, the exact measurement of those is difficult in manufacturing field. The weight measurement of a railway vehicle beneath the wheel using a weight scale is off by a large amount. This paper suggests a measurement method for the center of gravity and the moment of inertia of railway vehicles using vibration. For the measurement a railway vehicle is suspended using four wires. Direct measurement of the tension of the wires and the period of swinging motion of the suspended railway vehicle with calculations give the exact location of the center of gravity and the moment of inertia in x, y, and z directions, respectively. This implementation was demonstrated using an experimental device and verified numerically.

철도차량 롤 특성에 대한 고찰 (A Study on Roll Characteristics of Railway Vehicle)

  • 김필환
    • 한국철도학회:학술대회논문집
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    • pp.512-521
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    • 1998
  • The roll characteristic of railway vehicle is an important factor that affects the roll-over of vehicle and lateral ride comfort of passenger. Generally the roll characteristics of railway vehicle is defined by the term of roll-coefficient, s, which represents the ratio of incline or carbody to that of rail-cant. The limit values of roll coefficient recommended in UIC Bre 0.4 for coach without pantograph and 0.15 for vehicle with pantograph. The roll coefficient can be calculated by VAMPIRE that is the well-known commercial software for analysis of dynamic behavior of railway vehicle. The value of roll coefficient is effected by height of gravity center of carbody, stiffness of primary and secondary suspension and etc. The calculated roll-coefficient for electric locomotive and passenger coach is 0.12 and 0.77 respectively, The additional equipment such as anti-roll bar is considered in order to decrease roll-coefficient of passenger coach. In relation to roll characteristics, the analysis for roll-over due to wind is a1so performed. The results show that roll-characteristics affect the roll-over of vehicle.

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MR댐퍼를 적용한 철도차량의 안정성 해석 (Stability Analysis of Railway Vehicle Featuring MR Damper)

  • 하성훈;최승복;유원희
    • 한국소음진동공학회논문집
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    • v.18 no.7
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    • pp.732-740
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    • 2008
  • This paper presents vibration control performances and stability evaluations of railway vehicle featuring controllable magnetorheological(MR) damper. The MR damper model is developed and then incorporated with the governing equations of motion of the railway vehicle which includes vehicle body, bogie and wheel-set. A cylindrical type of MR damper is devised and its damping force is evaluated by considering fluid viscosity and MR effect Design parameters are determined to achieve desired damping force level applicable to real railway vehicle. Subsequently, computer simulation of vibration control and stability analysis is performed using Matlab Simulink.

MR 댐퍼를 적용한 철도차량의 안정성 해석 (Stability Analysis of Railway Vehicle Featuring MR Damper)

  • 하성훈;최승복;유원희
    • 한국소음진동공학회:학술대회논문집
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    • pp.957-962
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    • 2008
  • This paper presents vibration control performances and stability evaluations of railway vehicle featuring controllable magnetorheological (MR) damper. The MR damper model is developed and then incorporated with the governing equations of motion of the railway vehicle which includes vehicle body, bogie and wheel-set. A cylindrical type of MR damper is devised and its damping force is evaluated by considering fluid viscosity and MR effect. Design parameters are determined to achieve desired damping force level applicable to real railway vehicle. Subsequently, computer simulation of vibration control and stability analysis is performed using Matlab Simulink.

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철도차량용 냉방기 배관계의 진동저감 연구 (Vibration Reduction of Pipe Line in Air-conditioner for Railway Vehicle)

  • 유원희;정용호;구정서
    • 한국소음진동공학회논문집
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    • v.22 no.10
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    • pp.925-931
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    • 2012
  • The air-conditioner for railway vehicle should have vibration durability in order to operate normally in vehicle running situation. KS R 9144(vibration test methods for railway vehicle parts) is used to verify the vibration durability. The specifications of compressor, condenser and evaporator for air-conditioner in railway vehicle are standardized, but the shape and structure of pipe lines are not specified. Because the air-conditioner handler produces the pipe line arbitrarily, sometimes the pipe line is broken during the vibration durability test. In this research the cause identification and solution of pipe line breaking problem in during the vibration durability test were studied for air-conditioner of railway vehicle(diesel multiple unit). It was found that the natural frequency of pipe line is related to the pipe line breaking by experiment. A new pipe line shape was introduced by using FEA in order to avoid the resonance. The prototype new pipe line was applied to air-conditioner and the natural frequency was measured by experiment in order to verify the resonance avoidance. The vibration reduction of air-conditioner with new pipe line was reviewed by comparing to the air-conditioner with original one.