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사물인터넷 기반 장력조정장치 상태 모니터링 시스템 구현
이기원(Kiwon Lee),나경민(Kyung-Min Na),박영(Young Park),조호령(Ho-Ryung Cho) 대한전기학회 2019 전기학회논문지 Vol.68 No.8
The contact wire made of copper or copper alloy is installed to keep a good current collection performance between a pantograph and catenary system. The tensioning device installed in a contact and messenger wire is required to have high reliability as a major component of the feeding facility which keeps constant tension of the wires regardless of temperature changes. The maintenance of the tensioning device is generally performed by the man power. In this paper, we propose a condition monitoring system for a spring tension device using sensor network and communication based on Internet of Thing. The proposed monitoring system is composed of a structure integrated with tensioning device by applying an ultrasonic sensor with minimum power consumption and communication device. It was able to monitor the dynamic state of the tensioning device according to temperature change n real time through the displacement of ultrasonic sensor.
이기원(Kiwon Lee),박영(Young Park),권삼영(Sam-Young Kwon),조용현(Yong Hyeon Cho),정헌수(Heonsoo Jeong) 대한전기학회 2014 전기학회논문지 Vol.63 No.12
In order to develop a overhead catenary system for the maximum speed of 400 km/h on Honam high-speed line, increasing tension of contact wire, changing dropper distributions, reducing a hard point and etc. should be considered. And it is also essential to develop core components taking account of the increased tension. Therefore we developed a new steady arm for the max. speed of 400 km/h in this study. FEM (Finite Elements Method) analysis was performed to ensure the strength of the arm. An oval shape was applied to the arm, so that 25 % of strength was increased and 9 % of weight was decreased. And a type test according to the code KRSA-3012 was performed to ensure the performance. Fatigue test in KRRI (Korea Railroad Research Institute)’s test-bed was also performed to evaluate its performance. Some section of the Honam High-speed line was constructed with the developed steady arm.
강체전차선로 고속화를 위한 설계파라미터 민감도 분석 연구
이기원(Kiwon Lee),조용현(Kiwon Lee),권삼영(Sam-Young Kwon),박영(Young Park) 대한전기학회 2017 전기학회논문지 Vol.66 No.2
R-Bar (Overhead Rigid Conductor system) has been lately used for the speed of over 200 ㎞/h in Europe, while it has been developed and used for the max. speed of 120 ㎞/h in Korea. Because R-Bar has advantages of reduction of tunnel cross sectional area and maintenance, its development for more high-speed is urgent in Korea having many mountain area. Therefore a sensitivity analysis of design parameters for the speed-up of R-Bar has performed in this study. For the analysis, we have developed a program for the prediction of dynamic characteristics between a pantograph and R-Bar. The program was evaluated with the actual test result and a current collection performance according to the parameters such as a distance between brackets, a stiffness of bracket and of R-Bar rail was predicted with the program.
이기원(Kiwon Lee),김주락(Joorak Kim),권삼영(Sam-Young Kwon),창상훈(Sang-Hoon Chang) 한국철도학회 2004 철도저널 Vol.7 No.2
This study presents a development of DeCatS(Detail Design of High Speed Catenary System) which is a software to design high speed catenary system automatically. The program is developed by Korea Railroad Research Institute with the support of KHSR. A process of developing it and a comparison with LEXCAT, in order to demonstrate a preciseness of that, were performed. In the program, decision of H-beam, cantilever fitting, management of materials, automatic drawing and etc. according to input conditions can be accomplished. In this study, especially the program algorithm for the decision of mast was introduced.