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공진주파수 추적형 직렬공진 인버터를 이용한 고전압 CCPS에 관한 연구
노성찬,김윤호,Rho, Sung-Chan,Kim, Youn-Ho 한국조명전기설비학회 2005 조명·전기설비학회논문지 Vol.19 No.7
본 논문은 직렬공진 인버터를 이용한 고전압 커패시터 충전형 전원장치(CCPS)에 관하여 기술하였다. 본 논문에서 사용된 고전압 CCPS는 PLL제어를 사용한 45[Khz]의 직렬공진 인버터를 사용하여 고효율제어를 하였으며, 고전압 변압기를 사용하였다. CCPS의 성능을 평가하기 위하여 14[nF]의 부하에 100[kV]의 출력전압을 300[Hz]의 방전주기를 가지고 실험하였다. 실험결과 최대출력은 18.75[kJ/sec]이고, 방전시간은 200[Hz]로 운전하였으며, 충전시간은 4.5[mS]임을 확인하였다. RThis paper presents a high voltage capacitor charging power supply(CCPS) using a series resonant inverter. The CCPS adopted a 45[kHz] IGBT series resonant inverter using PLL control and a high-efficiency, high-voltage transformer. The performance test of the CCPS was carried out with a 14 nF load capacitor at 100[kV] output voltage and 200[Hz] repetition rate. Peak power rate of 18.75[kJ/sec] and charging time of 4.5[mS].
노성찬,No, Sung-Chan 대한예방의학회 1983 예방의학회지 Vol.16 No.1
1982년 5월 1일부터 9월 30일까지 5개월간 대구시내 중구 동구 서구 남구 북구 수성구 6개보건소에 등록되어 치료받고 있는 20세미만 폐결핵환자중 BCG접종 유무가 명확한 400명과 동 보건소에 참아온 일반환자 가운데 거주지역, 성 및 연령에 맞추어 뽑은 대조군 659명을 대상으로 BCG접종율을 기준삼아 BCG의 폐결핵 예방효과를 조사한 결과 그 성적을 요약하면 다음과 같다. BCG접종군이 비접종군보다 비교위험도가 2분의 1로 낮게 나타났으며, BCG접종으로 인한 예방효과는 51.5%였다. 따라서 BCG의 효과에 대한 많은 논란과 방해적으로 작용할요인, BCG접종으로 인한 합병증등 여러가지 문제들이 있으나 결핵유병율이 2.5%나되는 우리나라에서는 앞으로도 계속 BCG접종을 권장하여야 것 것으로 본다. The BCG vaccination has been employed as the main control measure for pulmonary tuberculosis in Korea since 1952. However, the protective efficacy of BCG against tuberculosis has been controversial worldwide. This study was conducted to evaluate the protective efficacy of BCG against pulmonary tuberculosis by a case-cotrol study. The study subjects included all the pulmonary tuberculous patients under 20 years of age who were registered in six health centers in Taegu City between May 1 and September 30, 1982. The controls were randomly selected among non-tuberculous out-patients matched by the age, sex and residence of the cases. The history of BCG vaccination was confirmed by the scar of 400 cases and 659 controls. The relative risk of the BCG recipients for pulmonary tuberculosis were 0.5 and the protective efficacy of the BCG was. 51.5%. It appears that the BCG vaccination is an efficient preventive measure in Korea where tuberculosis is prevalent. Thus the routine BCG vaccination should be continued.
노성찬(Sung-Chan Rho),김윤호(Yoon-Ho Kim) 한국철도학회 2003 한국철도학회 학술발표대회논문집 Vol.- No.-
AS a main Power Supply of the Railroad Vehicles, a three-Level ZVZCS DC/DC Converter is proposed in this paper. The proposed three-Level DC/DC Converter achieves zero voltage and zero current switching for the main switches. Its attribute is that the voltage across the switches is half the value of the input voltage. Also, using a diode and secondary side of the transformer, and simple auxiliary circuits it achieves zero current switching of the auxiliary switches. The principle operation and simulation results are included.
노성찬(Rho Sung-Chan),김수홍(Kim Soo-Hong),김윤호(Kim Yoon-Ho) 한국철도학회 2005 한국철도학회 학술발표대회논문집 Vol.- No.-
This paper presents contactless power transfer system for an electric railway system which makes use of electromagnetic induction among the coils. A full bridge type series resonant inverter in used as a power conversion system. and MC14046 PLL of Motorola is used as a control device. Finally, presented system is verified by simulation.
지하전철 구간의 미세먼지 제거를 위한 전기집진기 개발에 관한 연구
노성찬(Rho Sung-Chan),김윤호(Kim Yoon-Ho),김수홍(Kim Soo-Hong),이수원(Lee soo-won),유광균(Yoo kwang-kiun) 한국철도학회 2004 한국철도학회 학술발표대회논문집 Vol.- No.-
Electrostatic Precipitators have been used widely in industry, and play an important role in environmental protection. Electrostatic Precipitators(ESP) can be operated with a high collection efficiency and low pressure drop. Pulse energization is a technique to cope with high resistivity dust, and this results in lower power consumption. In this paper, Pulse energization ESP to use subway station air clean in subway station, design and test a pulse power supply for ESP.
철도차량 보조전원 Three-Level ZVZCS DC/DC 컨버터
노성찬(S.C.Rho),임응규(E.K. Lim),양성혁(S.H. Yang),김윤호(Y.H. Kim) 전력전자학회 2003 전력전자학술대회 논문집 Vol.2003 No.7(2)
Using a Assistance Power Sources of the Railroad Vehicles Three-Level ZVZCS DC/DC Converter is presented in this paper. The proposed three-Level DC/DC Converter is to achieved zero voltage and zero current switching for the two Main switches phase shift method is used a parastic capacitance by reverse recovery characteritics in a inner diode of the switching device. Also. using a diode second part of the Transformer by the simple auxiliary circuit for the achieved zero current switching of the Auxiliary switch. For the ZVZCS movement of the all switching devices is analyzed and verified under a 5kW, in the 100kHz switching frequency<br/>
객차 보조전원장치 interface를 위한 IEEE표준
노성찬(Rho sung-chan),임응규(Lim Eung-Kyu),김윤호(Kim Yoon-Ho) 한국철도학회 2002 한국철도학회 학술발표대회논문집 Vol.- No.-
The electrical interfaces among the components comprising the auxiliary power systems and their electrical interface with other train-borne systems are described. As such, this standard treats the auxiliary power system compononents as black boxes and addresses only their interface requirements.
다중일차권선 비접촉변압기를 이용한 비접촉 전원시스템의 공진주파수 추적에 관한 연구
魯成贊(Sung-Chan Rho),金倫鎬(Yoon-Ho Kim) 대한전기학회 2006 전기학회논문지 B Vol.55 No.3
Contactless power system is base on power transmission by magnetic force. The transformer loss is large because it separated with the gap. Also the system has unstable factor, since the parameters in the secondary can vary with the system movement. This paper proposes light train power transmission system using con tactless transformer with multiple primary winding. To increase the system efficiency and to obtain the stable power transmission to the dynamic load, a resonant inverter is adopted. The proposed system was verified by the simulation using Spice and Maxwell. The designed contactless power transmission system is implementd for 5[㎾] class and experimental results are discussed.
Mechanical Behavior of Steel Fiber Reinforced Lightweight Polymer Concretese
윤준노,성찬용,Youn, Joon-No,Sung, Chan-Yong The Korean Society of Agricultural Engineers 2005 한국농공학회논문집 Vol.47 No.2
In this study, the physical and mechanical properties of steel fiber reinforced lightweight polymer concrete were investigated experimentally with various steel fiber contents. All tests were performed at room temperature, and stress-strain curve and load-deflection curve were plotted up to failure. The unit weight of steel fiber reinforced lightweight polymer concrete was in the range of $1,020{\sim}1,160\;kg/m^3$, which was approximately $50\%$ of that of the ordinary polymer concrete, The compressive strength, splitting tensile strength, flexural toughness and flexural load-deflection curves after maximum load were shown with increase of steel fiber content. The stress-strain curves of steel fiber reinforced lightweight polymer concrete were bilinear in nature with a small transition zone, Based on these results, steel fiber reinforced lightweight polymer concrete can be widely applied to the polymer composite products.