• 연구논문집
• /
• s.26
• /
• pp.5-14
• /
• 1996

Test results of electromagnetic suspension (EMS) type urban transit maglev system are reported. Electromagnetic levitation system is a transportation system taking advantage of the attraction of normal conducting electromagnets to support and guide the train in combination with the linear induction traction motors. Urban Transit Maglev (UTM) Which is being developed by the maglev team in KIMM and the Hyundai Precision Company since 1995 consists of three bogies. In the first year, two types of Bogies are developed. Bogie I uses an analog controller for levitation and guidance control and is driven by two linear induction motors (LIM) mounted on the right and left side of module. Bogie II uses a digital controller and is driven by one LIM mounted along the center line of the bogie. Test results reported in this paper are those obtained with Bogie II with a digital controller. Also included in this paper is a brief explanation of the electromagnetic suspension levitation system which is being developed by the maglev team in KIMM.

• Proceedings of the KSR Conference
• /
• 2008.11b
• /
• pp.107-111
• /
• 2008

This paper presented a literature review and investigation analysis results of total 19 present guide book and provisions of maintenance and management system in existing railway bridges to development of urban maglev track structures inspection manual. This research carried out a cooperated research subject 3-1, development a design code and maintenance and management inspection manual for urban maglev track structures, of the Center for Urban Maglev Program. Three types of track structures were includes as a major analytical parameter together with railroad, high speed railroad, subway and light rail transit. Bridges were analyzed a general rules, investigation, evaluation, repair and strengthen method as a key aspect. And rail were analyzed examination and maintenance also. This analysis results show that the track structures evaluation are based on the test and examination results, and repaired or strengthened consideration of deterioration, track irregularity and materials according to provision requirements.

• Proceedings of the Korean Society of Precision Engineering Conference
• /
• 2010.11a
• /
• pp.923-924
• /
• 2010

• Journal of the Korean Society for Railway
• /
• v.19 no.4
• /
• pp.515-525
• /
• 2016

Parameter analysis of a pretension girder bridge for urban maglev transit was performed to identify the main design parameters and their effect. Girder deflection at mid-span is the most important design criteria of urban maglev transit. Therefore, concrete compressive strength, girder height, girder length, and unbonded tendon length were selected as the design parameters that relate to girder deflection. In addition, tendon layout and unbonded tendon ratios were also considered as design parameters to control the top stress of the pretension girder section at the support. The analysis results show that both the girder height and length are dominant design parameters governing girder deflection, more important than compressive strength and unbounded tendon length. And, sensitivity analysis makes this study suggest design weight value. In terms of stress, a tendon layout that can satisfy the unbounded tendon rule requires an additional tendon or rebar at the upper section to control the tensile stress on top of the section. Therefore, to improve feasibility and constructability in the future, an enhanced unbonded tendon rule considering the load characteristics of the urban maglev system should be studied.

• Proceedings of the KIEE Conference
• /
• 2007.10c
• /
• pp.14-17
• /
• 2007

자기부상열차는 직류 전원을 사용하여 부상용 전자석으로 주행선로와 10mm 내외의 부상상태를 유지하면서 교류 전원을 이용한 선형 유도전동기로 추진하는 방식이다. 본 논문에서는 실차 모델의 자기부상열차에 대한 전자파를 측정하여 국내 전자파인체보호기준 및 세계 권고기준과 비교 분석하였다.

• Proceedings of the KSR Conference
• /
• 2006.11a
• /
• pp.253-269
• /
• 2006

The Maglev Train System in Korea has been developed as a type of Light Rail Transit systems meanwhile. LRT systems which is a type of Urban Railway System, has been standardizing and some of them are prescribed but the Maglev System is not in the law Along with planning the Urban Maglev Train Commercialization Project in recent time additionally, we reviewed the contents of the laws for the commercialization of the system, and emerged the way to revise the relative laws.

• Proceedings of the KSR Conference
• /
• 2006.11b
• /
• pp.1004-1016
• /
• 2006

The Maglev Train System in Korea has been developed as a type of Light Rail Transit systems meanwhile. LRT systems which is a type of Urban Railway System, has been standardizing and some of them are prescribed but the Maglev System is not in the law. Along with planning the Urban Maglev Train Commercialization Project in recent time additionally, we reviewed the contents of the laws for the commercialization of the system, and emerged the way to revise the relative laws.

• Proceedings of the KIEE Conference
• /
• 1995.11a
• /
• pp.49-51
• /
• 1995

This paper deals with the magnet for Urban Transit Maglev-01 (Electro-Magnetic Suspension) which is experimented by the static magnet test bed. The test bed is developed for the hinge style. This paper shows the levitation force vs magnet current and difference of the yoke depth.

• Proceedings of the KIPE Conference
• /
• 2002.07a
• /
• pp.86-90
• /
• 2002

In this paper, traction system for urban transit maglev system is proposed. Using vector control strategy to control magnitude and frequency of output voltage transiently is general. But in case of traction system for railway vehicle, it is impossible that adapt vector control because there is one-pulse mode in a high speed region. So this paper proposes the control strategy using vector control in a low speed region and slip frequency control in a high speed region. And also proposes overmodulation method that makesto change in one-pulse mode softly. The performance of traction system will be verified by simulation results using ACSL.

• Proceedings of the KIEE Conference
• /
• 1998.07a
• /
• pp.40-42
• /
• 1998

The levitation magnets for the UTM-01(Urban Transit Maglev) take up a substential portion of the vehicle weight and vehicle cost. It is thus very important to reduce the weight of magnets by improving their performance and also reduce the cost of making them. A very extensive study was conducted to achieve above goals. Shape of the magnet core was varied and various core materials were tested. Also tested was the anodized sheet coil to replace the currently used rectangular shape Al coil. The study so far has improved the performance of the magnet substantially. The levitation force-to-magnet weight ratio has been improved from 6.8 to 9.2 as a result. This improvement reduced to magnet weight of the UTM-01 test vehicle by 900 kg.