• Proceedings of the KIEE Conference
• /
• 1999.11b
• /
• pp.40-42
• /
• 1999

In this paper, light-weight system of linear induction motor(LIM) for light railway train is presented, and is compared with former type of LIM. For the light-weight system without modification of motor size the material of primary core(silicon steel) is changed with iron-cobalt alloy and the material of primary winding(copper) is changed with aluminium. The characteristics of LIM are analyzed. Specially, the air gap magnetic flux density distribution due to end effect is showed with motor velocity, we will present papers continuously through designing and testing a trial product.

• Spatial Information Research
• /
• v.16 no.2
• /
• pp.207-218
• /
• 2008

Providing services in a wireless environment with existing wired-based GIS solutions have many limitations such as slow communication, processing rates and screen size. This study suggested data optimization techniques in a mobile environment to overcome those limitations in four steps. In order to test the methods suggested in the study, experiments are conducted using Gangnam-gu as a test site. An existing GIS engine built in a wired environment was compared with the optimized GIS engine from the study in terms of performance in the same environment. They were also compared and analyzed in terms of response data size, number of requests processed per second, and average time to process a request. The results proved that the proposed engine shows significant improvements in performance compared with the wired GIS.

• Proceedings of the KSR Conference
• /
• 2010.06a
• /
• pp.151-156
• /
• 2010

Monorail, with the cutting edge technology from EMU system, is small to medium sized transportation solution with bus size capacity, and one of key factors is to minimize size and weight. The Wolmi urban tour monorail, which is a center guide type first ever introduced in the world, is also consists minimizing size and weight of the propulsion system (inverter and motor), which generates considerable amount of heat. This study presents a solution of the structure and method of water cooling system of minimize the size and weight of high efficiency propulsion system, and an effective control method for energy saving.

• Proceedings of the KIEE Conference
• /
• 2004.07c
• /
• pp.1640-1642
• /
• 2004

현재 국내에서의 견인전동기 개발현황은 직류전동기는 655kw, 교류전동기는 210kw정도이며, 주행속도가 200km/h이상인 고속에 적용되는 1,000kW급 이상 유도전동기 기술은 한국형 고속전철이 국내에서는 최초이다. 최고 주행속도 300km/h급의 고속전철용 1,130kW 동기전동기에 대한 제작 및 시험기술만을 프랑스에서 이전 받아 유도전동기를 제작하였다. 고속철도 차량용 견인전동기는 한정된 공간에 취부되어야 함으로 경량화가 필수적이다. 또한 전력기기에 대한 에너지 고밀도화가 가능해야 함으로 열적 특성에 대한 분석이 체계적으로 이루어져야 한다. 본 연구를 통해 외기 온도, 주행 속도 및 운행 시간에 따른 견인전동기의 온도 특성 변화를 살펴봄으로써 고속전철용 견인전동기의 고정자 온도 특성을 확인할 수 있었다.

• Proceedings of the KIEE Conference
• /
• 2005.07b
• /
• pp.1601-1603
• /
• 2005

현재 국내에서의 견인전동기 개발현황은 직류전동기는 655kW, 교류전동기는 210kW정도이며, 주행속도가 200km/h이상인 고속에 적용되는 1,000 kW급 이상 유도전동기 기술은 한국형 고속전철이 국내에서는 최초이다. 최고 주행속도 300km/h급의 고속전철용 1,130kW 동기전동기에 대한 제작 및 시험기술만을 프랑스에서 이전 받아 유도전동기를 제작하였다. 고속철도 차량용 견인전동기는 한정된 공간에 취부되어야 함으로 경량화가 필수적이다. 또한 전력기기에 대한 에너지 고밀도화가 가능해야 함으로 열적 특성에 대한 분석이 체계적으로 이루어져야 한다. 본 연구를 통해 외기 온도, 주행 속도 및 운행 시간에 따른 견인전동기의 온도 특성변화를 살펴봄으로써 고속전철용 견인전동기의 고정자 온도 특성을 확인할 수 있었다.

• Journal of the Speleological Society of Korea
• /
• no.81
• /
• pp.55-74
• /
• 2007

지하전철은 고비용 구축에 의한 대량 수송의 실적에도 불구하고 현실적으로 고액의 적자행정에서 벗어나지 못하고 있다. 선진국에서는 비용과 효율성을 위하여 지하전철선호에서 지상 모노레일로 급격한 변화를 가져오고 있다. 특히 경량화에 의한 첨단기술력에서 생산되는 고급 모노레일 카의 쾌적성, 친환경적, 경제성, 저소음, 저오염, 국지적 효율성 등에 의한 유비쿼터스 사회에 기여될 수 있는 최적의 조건을 가지고 있으므로 향후 지자체 위주의 행정에 의한 재정자립도의 확보를 위한 관광지의 개발에 관련된 천연성 지형지물, 인문성 문화제, 조경성 예술분야 등에 효자 상품으로 등극할 것이다. 이에 따라 정책적인 조정에 필요한 법제도 및 지방 조례 등의 조정으로 특색 있고 미래지향적인 모노레일 카의 정책방안의 설정이 시급하다. 특히 지정학적으로 3면이 바다로 위호되어 있고 중국, 러시아, 일본 등의 열강 국들에 육교적인 지정학적인 최상의 관광 및 첨단 한류문화의 교류의 니치성 상품의 활성화로 상대적으로 작지만 큰 경제적인 효과를 가져 올 수 있는 신 수송환경에 적극적인 행정과 민의의 접점에 교두보적인 수송의 르네상스 개념이 필요하다.

• Proceedings of the KSR Conference
• /
• 2011.05a
• /
• pp.1793-1798
• /
• 2011

The railway structure for a rubber-wheeled automated guide-way transit system consists of a driveway and a guide-way. The most important factor of this system is the driveway and the guide-way aligned with each other, especially for curves and inclines section. The conventional construction method caused many problems such as discordancy by constructing the driveway before constructing the guide-way. Therefore, in this paper we introduce a new method of constructing a railway for a rubber-wheeled light rail vehicle; the new method of constructing the guide-way beforehand as a preceding process. The new method for AGT railway system can simplify the construction process and thus the construction costs may be reduced. It should also improve the driving performance and the comfortability in operating of a light rail vehicle.

• Proceedings of the KSR Conference
• /
• 2011.05a
• /
• pp.1629-1635
• /
• 2011

Because LRT project is large infrastructure projects investing enormous budget and required continuous maintenance after construction, it is the global trend to perform business in terms of life-cycle from the initial construction, operation to disposal. It is very important LRT to manage interfaces efficiently and to integrate vehicle, civil, track, electricity, communications, signals, operations, facilities organically. Global companies of the railway developed countries including Europe are getting orders a large rail project and preempting the world market based on engineering technology. But, domestic LRT systems engineering is the subcontracting level to the lack of practical skills and experience. Thus, technology securement is very urgent for the independence of systems engineering technology and overseas advance based turnkey. In this paper, we are going to study applicable systems engineering technology focusing on LRT system based on international standard ISO/IEC 15288.

• Proceedings of the KSR Conference
• /
• 2011.05a
• /
• pp.1434-1439
• /
• 2011

The purpose of this study is based on the optimize the system life cycle cost apply to the advanced systems engineering techniques consideration thought to the system life cycle for the power system which is the one of the major component of the light rail transit system. Generally, the systems engineering techniques apply to the LRT's power systems are not optimize the whole life cycle cost of the power systems because systems engineering management activities are concentrate in performing the key-technology oriented at the construction stage of the dedicated power systems for light rail transit. Through this study, All the stakeholders can be utilize a this advanced systems engineering techniques which is fully considered the life cycle cost through the considering in whole system life cycle (such as concept, design, operation, maintenance and dispose stage as well as construction stage) and adopted by KSX ISO/IEC 15288 system life cycle processes.

• Proceedings of the KSR Conference
• /
• 2011.05a
• /
• pp.226-238
• /
• 2011

RAMS (Reliability, Availability, Maintainability, Safety) study has received far less rigorous analysis in the system performance and integration level, and RCM (Reliability Centered Maintenance) research has been studying to improve the maintenance efficiency in the operational steps based on collected data of real operational cases. This paper analyzes the basic concepts based on KS X ISO/IEC 15288 system life-cycle process in the whole system for the light rail transit construction, and the research suggests an approach to the management process of the applicable main tasks. The paper "Management Process Study to RAMS Application of Light Rail Transit System" introduces Airport Rail cases and guidelines by using RAMS which is the major role in the system engineering technical process of ISO/IEC 15288 (International Organization for Standardization/International Electrotechnical Commission 15288) to apply RAMS in domestic light rail transit efficiently, the aim of this study is to broaden of understanding RAMS.