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박현준(Park Hyun-June),장동욱(Jang Dong-Uk),김길동(Kim Gil-Dong) 한국철도학회 2003 한국철도학회 학술발표대회논문집 Vol.- No.-
Aging and failure of motor insulation depend on the stresses imposed on it. The insulation life time depends on the severity of the stresses. The electrical aging by transient surge is very important to traction motor in EMU(electric multiple unit). This paper presents the insulation characteristics of stator coil by transient surge from inverter. There are several nondestructive tests available for checking the condition of motor insulation, the probable extent of aging, and the rate of which aging is taking place. So the insulation characteristics of stator coil were each analyzed by measurement of leakage current, dielectric loss(tan δ), capacitance, polarization index(PI) and partial discharge. The method of diagnosis is able to analyze the aging condition and predict the life of the traction motor in EMU.
전철전력분야의 유지보수현황 및 점검주기 (A Comparative Study on the Railway Electricity Maintenance Management)
박현준(Hyun-June Park),박영(Young Park),정호성(Ho-Sung Jung),김형철(Hyung-Chul Kim) 한국철도학회 2011 한국철도학회 학술발표대회논문집 Vol.2011 No.5
This article introduces the benchmarking methodologies, the results of comparative analysis on the railway electricity maintenance management - preventive maintenance, corrective maintenance, upgrade maintenance. This article also compares the Korean railway electricity maintenance management with the results mentioned above and analyses the situations of each country - France, Germany, Japan. Lastly this article tries to find the comparative position of the Korean railway infrastructure costs and discusses the direction of cost reduction in railway electricity maintenance management.
박현준(Hyun-june Park),이한민(Han-min Lee),김재원(Jae-won Kim),이장무(Chang-moo Lee),김길동(Kil-dong Kim) 한국철도학회 2016 한국철도학회 학술발표대회논문집 Vol.2016 No.5
경제성과 친환경적인 시스템의 기술개발이 요구되고 있고 선진국들은 활발한 연구가 진행되고 있다. 기존 방식은 곡선 주행 시 내측과 외측 반경 차에 의한 선속도 차이로 한쪽 차륜이 끌려가는 구조이므로 차륜과 레일이 마모되어 소음이 발생하고, 유지보수비용이 증가한다. 또한 유도전동기는 효율이 낮고 외부공기로 냉각하는 방식으로 이물질로 인한 유지보수 비용이 많이 들어가는 구조로 되어 있다. 도시철도 운행구간 중 급곡선 구간 비율이 높은 점을 감안할 때, 기존보다 전동기 효율을 향상시키고 곡선 주행 시 차륜이 각각 회전하게 구성하므로 곡선추종성을 향상시키면서 소음과 유지보수비용을 줄일 수 있는 영구자석 동기전동기타입의 각륜구동 전동기 기술개발이 필요하다. 이 분야의 국내외 특허동향을 분석해 보았다. Conventional induction motor driving system using the inner and outer radius of the curved lines by the car speed difference between the wheels is pulled to one side, so that the wheel and rail wear and noise is generated, and the maintenance cost is increased. In addition, the efficiency of the induction motor is cooled by the outside air is low, foreign matter way costly maintenance due to the structure in which there is need improvement. Thus, the use of high-energy class of urban rail-curve given that a high percentage of efficiency than conventional motors and rotate each curve so that the curve of the wheel when driving to improve traceability and reduce noise and maintenance costs of the permanent magnet synchronous independent-wheel-type traction motor skills need to be developed. This paper analyzed trends in the field of patents.
박현준(Park Hyun-June),이장무(Lee Chang-Moo),이한민(Lee Han-Min),장동욱(Jang Dong-Uk) 한국철도학회 2003 한국철도학회 학술발표대회논문집 Vol.- No.-
The 200 class insulation system which adopted to traction motor have excellent dielectric strength but weaken to thermal stress therefore deterioration phenomena analysis according to thermal stress is necessary. Accelerated thermal aging tests have been used to determine thermal reliability of stator coils used as traction motor in electric multiple unit. The conventional aging test is carried on according to IEC 60034-18-31 and IEEE Std. 275-1992. Variation in insulation resistance, R.I, capacitance, dielectric loss(tan δ) and partial discharge are measured during the aging cycle. Sample coils for traction motor were tested by accelerated aging test which composed of heat, vibration and moisture. Reliability and expected life were evaluated on the insulation system for traction motor.
김길동,한영재,박현준,이사영,Kim, Gil-Dong,Han, Young-Jae,Park, Hyun-June,Lee, Sa-young 한국철도학회 1999 한국철도학회논문집 Vol.2 No.1
This purpose of this paper is to perform the readhesion control algorithm of the urban railway traction. A study on readhesion control algorithm is done for the adhesion system. This system has all characteristics of the voltage source converter by a process ability to regenerate power. The traction motor is controlled by IGBT inverter. The test equipment composes traction motor, torque-meter, clutch, and a tubular type of interia mass.