• 한국철도학회:학술대회논문집
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• 한국철도학회 2011년도 정기총회 및 추계학술대회 논문집
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• pp.3007-3018
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• 2011

This paper describes how to apply to commutate of thyristor efficiently. Thyristor is used for the high power system, as the research to secure domestic technology of the Current Source Inverter(CSI) for the synchronous motor operation which is used for the propulsion system of KTX. It has been composed to be available for the stable switching operation of the thyristor by supplementing problem of load commutation method, according to small Counter ElectricMotive Force(EMF) at low speed area of synchronous motor, via auxiliary commutation circuit using forced commutation method. We also have verified through the simulation using the Matlab.

• 한국철도학회:학술대회논문집
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• 한국철도학회 2003년도 춘계학술대회 논문집
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• pp.433-438
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• 2003

The recent operating trains including the high speed train are mostly moving system on the rail and system use the mechanical propulsion force to drive the gear and wheel by the traction motor. Advanced countries are interested in Magnetic Levitation Vehicle and they have been studying about it continuously. Thus this paper is analyzed the feature of analysis the feature for Linear Induction Motor as the propulsion equipment of Magnetic Levitation Vehicle. And the Magnetic Levitation Vehicle is being developed for the transportation system of next generation using the Finite Element Method

• 한국철도학회:학술대회논문집
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• 한국철도학회 2011년도 정기총회 및 추계학술대회 논문집
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• pp.1191-1198
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• 2011

The railway business was began at England in 1767. Since then, it has been changed for configuration of rail over the years and made in the form of I. The train propulsion has been developed in a engine of steam, diesel, motor, electromagnetic force and a pneumatic engine, continuously. also, the friction has been improved in a steel-wheel, rubber tire, frictionless maglev system and railless system. In consequence, the efficiency and improvement speed for train have been accomplished. In this paper, it is investigated for the structure with lightweight using the change for supporting the form of lateral pressure by centrifugal force in the substructure supporting load for railway vehicles.

• 한국철도학회:학술대회논문집
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• 한국철도학회 2011년도 정기총회 및 추계학술대회 논문집
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• pp.2031-2036
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• 2011

To leading subway technology Advanced Urban Transit System is developed by national research and development. Next-generation trains equipped with direct driving permanent magnet traction motor and individually controlled propulsion system. Electromagnetic properties of the Next-Generation Train from four perspectives will be discussed. The first is closely related to human hazards that affect the 60Hz low frequency electromagnetic field. The Second is inductive noise that affect railroad signal system. The third is conductive noise that affect communication line near railroad. The 4th is radiation noise that may affect electronic equipment near the railroad tracks.

• 제어로봇시스템학회:학술대회논문집
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• 제어로봇시스템학회 2005년도 ICCAS
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• pp.1347-1350
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• 2005

Recently, as the road capacity reaches a limit and environmental problems become serious, there exists a gradual increasing need for railway vehicles that are environment-friendly, punctual, reliable and safe. Accordingly, in addition to conventional railroad vehicles, lots of vehicles are being newly developed. Using the developed installed measurement system, the performance characteristics of railway vehicle could be monitored precisely. After recording the input real time data of each signal from railway vehicle to the network line, we could acquire the needed information through post processing program. We could verify the running performances of railway vehicle using this system. As a result, many latent defects have been found and corrected in the prototype train. The measurement systems have contributed to dramatic reduction of the developing period.

• 한국철도학회:학술대회논문집
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• 한국철도학회 2010년도 춘계학술대회 논문집
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• pp.830-837
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• 2010

Since it started the researches on a maglev train on 1960, Germany and Japan arrived to putting to practical use level and accomplished most tests from their test-line. Korea is in progress the preparation for a practical use of low-speed maglev train in 110 [km/h] class and Korea Railroad Research Institute(KRRI) is in progress of a research about core technology of maglev system for high-speed tube train of 700 [km/h] class. In this paper, authors suggest an effective design method of Linear Synchronous Motor(LSM) for high-speed tube train of 700 [km/h] class which has a wound type electro-magnet. Then, authors calculate a variety of properties by changing speed of the LSM model which is designed by a method based on some theoretical equations. Then, authors verify the validity of the method based on some theoretical equations through a verification of property values by Finite Element Method(FEM) analysis method. Finally, in order to design a shape of pole-shoe part of LSM electro-magnet which is hard to design with a basic design method, authors analyze a transition of property values by changing a pole-shoe width and current of the electro-magnet through an analytical method by FEM.

• 전력전자학회:학술대회논문집
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• 전력전자학회 1998년도 Proceedings ICPE 98 1998 International Conference on Power Electronics
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• pp.425-430
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• 1998

This paper presents a high performance low switching PWM technique for the propulsion system of railway such as subway and high speed train. In order to achieve the continuous voltage control to six-step and a low harmonics with low switching frequency under 500Hz, the synchronous PWM technique is combined with a space vector overmodulation and implemented by using DSP. Improved performance and a validation of proposed method are showed by the digital simulation and the experimental results using a 1.65MVA IGBT VVVF inverter and inertia load equivalent to 160 tons railway vehicles.

• 한국철도학회:학술대회논문집
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• 한국철도학회 2008년도 추계학술대회 논문집
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• pp.518-523
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• 2008

경부고속열차(KTX) 차량컴퓨터제어장치(OBCS : On Board Computer System)는 네트워크 통신을 이용하여 차량내 각 종 전장품의 동작상태 감시와 운행명령 및 열차제어, 차량의 유지보수, 승무원의 운전업무를 지원하는 장치로써 KTX의 핵심장치이다. 이 장치는 TGV 제작사양과 프랑스의 고속열차 운영방식에 종속되어 특화된 시스템으로 제작되었으므로 실질적인 기술이전이 어려운 상태이다. 그렇기때문에 KTX 국내도입 후 운영상 요구되는 기능개선 및 자체적인 유지보수, 각 종 전장품(추진제어장치, 보조전원장치, 출입문제어장치 등)의 국산화 교체시 대부분의 인터페이스 신호가 차량컴퓨터제어장치(OBCS)와 연계되어 있어 많은 어려움이 수반되고 있다. 따라서 본 연구에서는 KTX 차량컴퓨터제어장치의 기능분석 및 주변장치(기관사 콘솔, 여객정보시스템, 고장현시장치, 각종 전장품 등)와의 상호 인터페이스 정보분석을 통해 KTX-OBCS 국산화 개발을 함으로써 KTX 운영상 요구되는 기능개선 및 유지보수 효율화에 기여하고, 더 나아가 고속열차제어 및 전장품 분야에서 선진 외국기술의 종속을 탈피하여 기술자립화를 이루고자 한다.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2000년도 하계학술대회 논문집 B
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• pp.1140-1142
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• 2000

This paper describes a down-scaled model for a high-speed railway train. The propulsion system of simulator consists of four line-side converters four induction motors driven by two inverters, an eddy current braking system, two dynamic braking systems. The control algorithm of traction and braking including anti-skid control can be developed using the simulator. Simulator design procedure. control algorithm and some experimental waveforms are presented in this paper.

• 전력전자학회논문지
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• 제4권6호
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• pp.491-499
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• 1999

본 논문은 새로운 제어기법의 고성능 전동차 추진용 IGBT VVVF 인버터에 관한 것이다. 현차 적용 전에 견인력 제어성의 우수함과 안정성을 검증하기 위해, 현차 조건에서 발생될 수 있는 경우에 대한 모의 주행시험을 실시하고 그 결과를 보인다. 모의 주행시험은 160톤의 차량을 등가화한 관성부하장치를 이용하여 정상상태는 물론 전압변동 등 각종 과도상태에 대해서도 실시하였다. 본 논문에서는 4병렬 접속된 견인전동기의 토오크 제어성 향상을 위한 벡터제어기법 적용과 공간벡터 변조기법에 동기방식을 적용하여 500Hz이하의 저주파 스위칭으로써 6스텝까지 연속 과변조 제어가 가능한 최적의 PWM방법을 제시한다.