• 한국정밀공학회:학술대회논문집
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• 한국정밀공학회 2012년도 춘계학술대회 논문집
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• pp.1261-1262
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• 2012

• 한국철도학회:학술대회논문집
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• 한국철도학회 2007년도 추계학술대회 논문집
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• pp.1824-1826
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• 2007

Since standardization project is composed of complicate system, such as vehicle, signal, electric power and railway, how to build management system of the project has influence on the success of the project for the first stage of the project. The computer system design tool supports to carry out requirement analysis, DB construction, and history and follow-up management efficiently. Therefore, the aim of this study is to investigate the method to optimize schema using computer system design tool.

• 한국철도학회:학술대회논문집
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• 한국철도학회 2003년도 추계학술대회 논문집(III)
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• pp.91-97
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• 2003

In many countries such as Japan, France and so on, the number of double-deck trains has been dramatically increased for the purpose of public traffic. Several researchers have performed feasiblilty studies related to the operations of double deck rolling stock vehicles in Korea since 2001. In recent years, rolling stock vehicles are required to have light weight to save energy consumption and maintenance costs. For these reasons, the standard EMU vehicle developed by KRRI and Kwan-Ju EMU(Electric Multi Unit) are made of aluminum extruded panels. The concept model of a double-deck rolling stock vehicle investigated in this study is also designed to use AEP(Aluminum Extruded Panel). In this paper, the methods related to the structural strength improvements of the car body are proposed through careful modifications of thicknesses and shapes of AEP.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2007년도 제38회 하계학술대회
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• pp.1259-1260
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• 2007

In this paper, the inductive power collector using electromagnetic induction for vehicle such as the electric railway vehicle system is suggested and some ideas for power collector design to improve the power transfer performance are presented. The inductive power of secondary part is related to amount of linked flux to secondary part by the length of air-gap, which is expected by such a system parameter as mutual inductance. This paper will study for the transfer characteristic of power from input to output and equation including mutual inductance. And also, effect of leakage inductance variation of inductive power collector according to structure of winding was considered.

• 한국철도학회:학술대회논문집
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• 한국철도학회 2006년도 추계학술대회 논문집
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• pp.928-934
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• 2006

최근 환경 친화적인 시스템 개발 및 에너지에 대한 연구가 부각되고 있는 가운데 근래 교통시스템 분야에서도 전기자동차, 신교통 시스템 등의 친환경적 교통수단의 개발이 활발하게 진행 중에 있다. 최근 전기자동차는 환경오염 문제의 대안적인 교통시스템으로 제시되었음에도 불구하고 짧은 1회 충전 주행거리와 긴 충전시간 등 아직 개선되어야 할 문제를 가지고 있다. 또 경량전철의 경우, 기존 접촉에 의한 전력 공급 장치는 유지보수 및 관리비용이 높을 뿐만 아니라 미관상으로도 환경친화성이 낮고 우발적인 접촉으로 인한 사고 등 안전문제가 발생하는 단점이 존재한다. 본 논문에서는 이러한 문제점을 개선할 수 있는 전기궤도차량용 유도 급전 시스템의 개념을 제시하고 전력 집전자의 구조에 대한 상호인덕턴스의 값을 유추하여 시스템의 전력전달 특성에 관하여 알아보고자 한다. 전기궤도차량용 유도 급전 장치는 여객수송을 목적으로 하여 기존의 산업계에서 개발된 소규모 장치보다는 공극의 길이가 길고 대전력을 요구한다. 큰 공극은 유도 급전 장치 주변에 보상회로를 필요로 한다. 고정주파수의 1차측 공진회로를 이용한 보상회로에서의 전력전달특성을 시뮬레이션과 실험을 통하여 알아보았다.

• 한국철도학회:학술대회논문집
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• 한국철도학회 2010년도 춘계학술대회 논문집
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• pp.1885-1891
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• 2010

Recently metropolitan local governments is actively introducing urban railway's expand and light rail transit as a means of new transport system. DC electricity feeder system operating in the domestic urban railway is typically a feedback circuit consisted of the contact wire and electric railway vehicle via rail. But stray current is to be defined as a current flowing on a structure that is not part of the intended electrical circuit with respect to a given structure. Stray current is generally results from the leakage of return currents from large DC traction systems that are grounded or have a bad earth-insulated return path. At the place where the current leaves the rail and metallic structures, electrolytic corrosion may take place. This paper presents comparison analysis of field test methods based on criteria of electrolytic corrosion protection of buried metallic structures adjacent to DC traction systems.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2011년도 제42회 하계학술대회
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• pp.2208-2209
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• 2011

In this paper, the contactless power transfer using inductive power collector in order to apply to the vehicle such as the electric railway vehicle system is suggested and some ideas for power collector design to improve the power transfer performance are presented. This paper was presented for the transfer characteristic of power from input to output by resonance converter.

• 반도체디스플레이기술학회지
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• 제15권4호
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• pp.61-66
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• 2016

This paper presents the implementation for a network structure of railway cars using a point to point communication. Most of network's representative specifications for a train are the FIP (Field Bus), MVB (Multifunction Vehicle Bus), CAN and WTB (Wire Train Bus) which is used by ALSOM, SIEMENS and BOMBADIER as major in this field. These networks in a physical layer use a multi-drop method, connected from $1^{st}$ car to $n^{th}$ car of a train through a cable without any extra services such as an electric part, amplifier. However waveforms which is passed through a long cable in the multi-drop are distorted by a capacitance or resistance of the cable or environments. Also since using a cable connected directly from $1^{st}$ car to $n^{th}$ car, if over two trains make double head, it isn't easy to distinguish ID for each railway cars. So by using the point to point network per each car, it is able to reduce a distortion. Also since reducing distortion, this communication speed can be been higher and transmit and receive any packets more stably. Using proposed token in a packet, this can make ID per each railway car automatically. Finally experimental results show the good performance and effectiveness of the proposed method.

• 한국전자통신학회논문지
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• 제13권2호
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• pp.457-462
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• 2018

국내 철도운영기관에서는 고속화 무인화에 따른 보다 효율적이고 더욱 스마트한 운영, 유지보수 및 관리를 위한 시스템을 절실히 필요로 하고 있다. 따라서 영상기반 기술을 국내 철도산업에 적용한 지능형 운영, 유지보수 및 관리 시스템 개발을 위한 많은 연구들이 있다. 본 논문에서는 철도안전시스템, 철도차량 유지보수, 그리고 철도시설물 관리를 위한 지능형 시스템을 개발하기 위하여 영상기반 기술을 사용한 국내 연구들을 분석한다. 그리고 딥러닝 기술 등이 사용된 보다 강력한 영상기반 기술을 적용하여 철도운영기관에서 필요한 시스템을 개발하는 연구의 방향을 제시한다.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2007년도 제38회 하계학술대회
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• pp.1175-1176
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• 2007

Recently, the electronic components are used plentifully to the railway trains. This paper explains the aging mechanism which is investigated from Japanese electric trains. Investigating results about the vehicle breakdown of the machinery are explained. We can know breakdown tendency of a cause place, occurrence date etc. by investigating results.