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위상차(PDOA)를 이용한 열차 위치검지의 H/W 설계
정락교(R.G.Jeong),윤용기(Y.K.Yoon),조홍식(H.S.Cho),이병송(B.S.Lee),정상기(S.K.Chung),김영석(Y.S.Kim) 전력전자학회 2003 전력전자학술대회 논문집 Vol.2003 No.7(1)
TOA(Time of Arrival) 및 TDOA(Time Difference of Arrival) 경우 무선국의 시간동기화를 위해서 고도의 기술을 요구하고 있으며, 시간동기오차에 따른 위치검지의 정밀도가 낮아지는 문제가 있어 이를 극복하기 위하여 위상차(PDOA)를 이용한 새로운 열차검지기법의 제안에 따른 구현을 위하여 H/W의 설계에 대하여 기술하고자 한다. 본 시스템은 전파의 전달 속도(λ)를 응용하여 기준 주파수인 15MHz를 송신 시스템과 수신 시스템의 기준 주파수와 비교하여 그 위상의 차이를 비교하여 지연 된 시간을 구한 후 이를 거리로 환산하는 시스템으로서 H/W와 S/W로 구분하여 구현.설계 되는데 본 논문에서는 H/W설계에 대하여 기술하였다.
이형우(Lee H-W),이성구(Lee S-G),박찬배(Park C),권삼영(Kwon S-Y),이병송(Lee B-S),이주(Lee Ju),박현준(Park H-J) 한국철도학회 2009 한국철도학회 학술발표대회논문집 Vol.2009 No.5월
This paper presents the influence of the airgap tolerance on performance of a linear induction motor. Construction tolerance of the plate affects directly to the cost and performance of the Linear metro. LIM has around 10[mm] large airgap with many restrictions such as construction tolerance, thermal expansion and bend of the reaction plate, abrasion of the wheel, and so on. In order to have steady performance, the airgap should be uniform. But it is impossible to maintain the secondary reaction plate be flat along with the long track. Therefore the influence of the flatness on performance of a LIM should be investigated.
정전압 DC 급전시스템에서의 회생전력모의를 위한 조류계산 알고리즘
정상기(Chung S.G.),이병송(Lee B.S.),정낙교(Jung R.G.),박성혁(Park S.H.),이승재(Lee S.J.) 한국철도학회 2001 한국철도학회 학술발표대회논문집 Vol.- No.-
The problems in the loadflow study of the fixed voltage DC traction power supply system including the regeneration power is analyzed. And the computer algorithm to avoid the problem is developed. A computer program using the developed algorithm was developed. A test run of the computer program is conducted and the result shows the algorithm and the program developed is very effective for the loadflow study of the system including the regeneration power.
정락교(R.G. Jeong),김연수(Y.S. Kim),윤용기(Y.K. Yoon),이병송(B.S. Lee),이병택(B.T. Lee),이정식(J.S. Lee) 한국철도학회 2000 한국철도학회 학술발표대회논문집 Vol.- No.-
In general, a third rail current collecting shoegear is used widely in the light rail transit system, which is more efficient than overhead pantograph. Therefore, Korean standard specifications for the light rail transit prescribes for the application of it. This paper describes the development of third rail current collecting shoegears, which is suitable to Korean situation and satisfied with Korean standard specifications. Two types are developed for steel wheel AGT system and rubber tyred AGT system, and various experiments are executed.
정상기(Chung S.G.),이병송(Lee B.S.),정락교(Jeong R.G.),박성혁(Park S.H.),김국진(Kim K.J.) 한국철도학회 2001 한국철도학회 학술발표대회논문집 Vol.- No.-
In this study we examined the method to estimate numerically the amount of the regenerated power and the excess regenerated power produced in the DC electric power supply system for the urban light rail transit system. And their economic feasibilities are also studied. For this study DC electric power supply system is simulated and the numerical analysis of the regenerated power and the excess regenerated power are conducted. The study result on the sample system shows that the facility to consume the excess regenerated power or the inverting equipment to reuse the excess regenerated power in the electric substation is feasible economicallv.