Research on gap sensor and position sensor for high speed maglev train

Yan Sun(손연),Changyoung Lee(이차영),Youngjae Han(한영재) 한국철도학회 2013 한국철도학회 학술발표대회논문집 Vol.2013 No.11

Maglev has got a lot of attention as a new transportation method due to its superior characters, such as high speed operation, low energy consumption, high level safety control, and environment friendly. Compare with conventional wheel on rail trains, maglev train suspends on the track, so suspension gap is a crucial parameter related to safety operation. Due to its non-contact and high speed operation, real-time control is highly enhanced. To ensure reliable and safety operation, precise suspension gap and position and speed information are needed. Suspension gap are measured by gap sensor and position and speed information are collected by position sensor, these information are sent to control center for operation control. This paper is to investigate and compare the working principle of gap sensor and position sensor.

Research on Position Detecting Method for High-Speed Train with Coreless Linear Synchronous Motor

Yan Sun(손연),Chang Young Lee(이창영),Young Jae Han(한영재) 한국철도학회 2014 한국철도학회 학술발표대회논문집 Vol.2014 No.5

One successful application of coreless LSM (Linear Synchronous Motor) is Japanese Maglev system at the Yamanashi Test Line. Position detection of Yamanashi Test Line was realized by inductive radio system which consists of onboard receiving antenna and cross inductive cable. By analyzing amplitude and phase variation of inductive electromotive force from receiving antenna, position and speed information could be determined. However, coreless LSM is proposed for wheel-on-rail system in this paper not for suspension system. We are going to introduce a novel SM (Superconducting Magnet) coreless LSM, which will provide propulsion force for wheel-on-rail high speed train. Inductive cross-loop cable could also be applied for this proposed system, but considerations should be taken due to effects of tracks and complicated electromagnetic field.

Analysis of Relative Position Sensing System for SUMA Based on LSM

Yan Sun(손연),Changyoung Lee(이창영),Youngjae Han(한영재) 한국철도학회 2013 한국철도학회 학술발표대회논문집 Vol.2013 No.5

Position and speed information is quite crucial for traction and power control system of high speed maglev trains to ensure reliable and safety operation. To get precise position data, absolute positioning and relative positioning are required. Relative positioning is used to get high-accuracy position data and absolute positioning is used to eliminate cumulated errors from relative position signals. In this paper, LSM of SUMA system is presented and compared with that of Transrapid. To find a most appropriate relative position sensing system for SUMA, several methods are discussed and the one based on tooth-slot structure of long stator is analyzed in detail.

Conceptual design of contactless power transfer system for high speed maglev

Yan Sun(손연),Changyoung Lee(이창영),Youngjae Han(한영재) 한국철도학회 2014 한국철도학회 학술발표대회논문집 Vol.2014 No.10

Contactless power transfer (CPT) is a promising technology for various applications and contactless power transfer system based on resonance coupling method is proposed to solve mid-range power transfer between transmitting antenna and receiving antenna. There are many researches about wireless charging for electrical vehicle or smart phone and 180kW/60kHz wireless power supply has already been realized to provide power for wireless tram. Based on current research of CPT, this paper will introduce a conceptual design of CPT system for high speed maglev and high temperature superconducting (HTS) antenna is proposed to realize higher power transfer efficiency.

4G LTE 기술을 적용한 고속철도 통신/신호 시스템 영향력에 관한 연구

손연(YAN-SUN),이창영(Chang-Young Lee),한영재(Young-Jae Han),이진(Jin-Li) 한국철도학회 2011 한국철도학회 학술발표대회논문집 Vol.2011 No.10

Due to speed acceleration higher requirements have been put forward to high speed railway communication and signaling system. The railway applications including intra-train train to ground and trackside networks demand larger bandwidth higher reliability and shorter response time from railway communication networks to ensure security operation and passenger communication. However the current railway communication and signaling system has lagged behind the railway development so advanced communication technologies are needed to improve the current situation. This paper presents high speed railway communication and signaling system based on 4G LTE technology introduces its network architecture key technology and analyzes its technical advantages compared with GSM-R system. According to analysis LTE based high-speed railway communication network is more effective and reliable.

초고속 자기부상철도용 위치검지 시스템 설계 및 성능평가

이진호(Jinho Lee),조정민(Jeongmin Jo),한영재(Youngjae Han),이창영(Changyoung Lee),손연(Yan Sun) 한국철도학회 2014 한국철도학회 학술발표대회논문집 Vol.2014 No.5

선형동기전동기를 동력원으로 하는 시속 500km 이상의 초고속 자기부상열차의 추진 효율을 극대화하기 위해서는 운행하는 열차의 위치를 정확히 검지하여 이와 동기화된 전류를 궤도에 설치된 코일에 공급해야 한다. 이러한 위치검지 시스템은 분해능, 검출속도, 검지범위와 같은 기본 성능 이외에 내환경성, 신뢰성 및 설치용이성 등도 함께 고려해서 설계, 제작되어야 한다. 본 연구에서는 초고속 자기부상철도의 위치검지 시스템으로 제안한 4 가지 안에 대해서 특성을 살펴보고 프로토타입으로 제작된 단품별로 성능을 평가함으로써 실제 적용 가능성에 대해서 검토하고자 하였다. To maximize the propulsion efficiency of 500km/h super speed maglev which is propelled by linear synchronous motor(LSM), precise position of train should be detected and the synchronized current by using position information is provided to the LSM coil installed in guideway. Basically, position detection system should have enough resolution and detecting range with target speed. However, specifically, protection performance against environmental problem, reliability and convenience in setting up are also important factors for design and manufacturing. In this study, regarding 4 types of position detection system, main features are reviewed and then, by evaluating the performance, the feasibility of each type is examined.

초고속 LSM 추진용 초전도 전자석 시작품의 설계, 제작 및 평가

이창영(Changyoung Lee),박찬배(Chanbae Park),이진호(Jinho Lee),손연(Sun Yan),김석호(Seokho Kim),윤상원(Sangwan Yoon) 한국철도학회 2014 한국철도학회 학술발표대회논문집 Vol.2014 No.10

초전도 선형동기모터(LSM) 추진 기술을 이용한 600km/h 급 레일식 초고속 철도에 대한 연구가 진행 중에 있으며, 초전도 LSM 추진 기술의 타당성 연구를 목적으로 초전도전자석 시작품을 이용한 축소형 LSM 추진 장치를 개발하였다. 초전도 전자석 시작품은 2 극 구조로, 하나의 냉각조 내에 2 개의 초전도 코일로 구성된다. 각 초전도 코일의 기자력은72kAt 이며, 600 km/h 급 실 모델 대비, 약 1/5 크기 및 성능의 자기장을 발생 하도록 설계되었다. 사용된 초전도 도체는 임계전류가 200A(@77K) 이상인 GdBCO 계열의 고온초전도체로서, 100 % 국산화 선재를 사용하였다. 초전도 전자석의 냉각은 냉매 Free 를 위한 전도냉각기술을 적용하였으며, 약 7~10K (-266~-263℃)의 온도에서 운전하였다. 본 논문에서는 초전도 전자석 시작품의 설계, 제작 및 평가 결과를 소개한다. KRRI(Korean Railroad Research Institute) has studied superconducting linear synchronous motor (LSM) as the propulsion system for 600km/h high-speed railway. A scale-down superconducting LSM has successfully developed to demonstrate the system’s design feasibility. This paper introduces the design, fabrication and tests of the prototype superconducting electromagnet. The electromagnet consists of 2-pole superconducting coils in one cryostat, which is about 1/10 scale-down model in the performance of realscale one. The superconducting coil uses 2<SUP>nd</SUP> generation high-temperature superconductor (HTS), GdBCO, as the coiling material which was fully provided by a Korean manufacturer. The electromagnet is operated at the cooling temperature of 7~ 10 K and generates the electromotive force of 72,000 At.

고속 자기부상열차의 위치검지 및 궤도모니터링을 위한 센서 기술 분석 및 검증

이진호(Jinho Lee),조정민(Jeongmin Jo),한영재(Youngjae Han),이창영(Changyoung Lee),손연(Yan Sun) 한국철도학회 2014 한국철도학회 학술발표대회논문집 Vol.2014 No.10

국내에서 개발중인 고속 자기부상열차의 주요 특징은 크게 선형동기전동기에 의한 추진과 상전도 흡인 방식을 적용한 부상으로 구분할 수 있다. 선형동기전동기를 이용한 추진제어를 위해서는 운행중인 열차의 위치를 검지하여 이와 동기화된 전류를 지상코일에 공급해주어야 하고, 열차 운행중 안정적인 부상상태의 유지를 위해서는 가이드웨이의 불규칙성을 수시로 모니터링해야 하는데 이를 위해서는 고속 자기부상열차에 특화된 센서기술이 필수적으로 요구된다. 본 연구에서는 이러한 고속 자기부상열차의 위치검지 및 궤도모니터링을 위해 사용되는 센서 기술을 분석하고 축소모델로 제작된 테스트베드를 이용한 실험을 통하여 검증함으로써 향후 적용가능성을 검토하였다. The high speed maglev is mainly characterized by propulsion using linear synchronous motor(LSM) and vehicle levitation from the guideway surface. In LSM propulsion control, the position detection sensor is used to detect running vehicle position for synchronized current generation. And to maintain the stable levitating condition during vehicle running, the irregularity of guideway surface should be monitored by sensors measuring the displacement and acceleration between vehicle and guideway. In this study, the application methods of these sensors in the high speed maglev are investigated and through the experiments by using the small-scale test bed, the validity of examined methods is confirmed.

초고속 자기부상철도용 위치검지 시스템 개발 및 적용에 관한 연구

이진호(Jin-Ho Lee),조정민(Jung-Min Jo),이창영(Chang-Young Lee),한영재(Young-Jae Han),손연(Yan Sun) 한국철도학회 2013 한국철도학회 학술발표대회논문집 Vol.2013 No.11

550km/h이상의 초고속 자기부상철도의 추진을 위해서는 고효율 및 대용량 추진이 가능한 선형동기전동기(LSM: Linear Synchronous Motor)가 사용되는데, LSM의 제어를 위해서는 운행 중인 열차의 위치를 실시간으로 파악하여 전력변환장치의 제어기에 제공해 주어야 위치와 동기화된 전류를 궤도 고정자에 적절히 공급할 수가 있다. 이러한 위치검지 시스템의 정확도는 열차의 추진 효율을 좌우하는 중요한 요소로서, 고속에서도 운행중인 차량의 위치를 정밀하게 검출할 수 있어야 하고, 동시에 외부 환경에서도 장시간 사용할 수 있도록 내환경성 및 신뢰성이 확보되어야 한다. 본 연구에서는 이러한 위치검지 시스템에 대한 여러 가지 안에 대해서 장단점을 검토하고 실제 적용 가능성에 대해서 분석하였다. For super speed maglev train with 500km/h level, the high power and efficient linear synchronous motor(LSM) as a propulsion device is used. To control the LSM, the real time position information of maglev must be detected and transmitted to the controller which provides the positionsynchronized power to the LSM. The position detection performance is key factor which determines the control efficiency and it requires the precise detection during fast running and robustness against external environment. In this study, the position detection system for super speed maglev is investigated and several candidates are proposed and analyzed.