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새로운 회전자검출 방법에 의한 8/6 스위치드 리럭턴스 모터 속도 제어
정도영(Do-Young Jung),박영록(Young-Rock Park) 한국산업융합학회 2003 한국산업융합학회 논문집 Vol.6 No.4
This paper proposed new techniques of rotor position detection for 8/6 pole Switched Reluctance Motor(SRM). This technique is very simple and easy to find out rotor position. The main idea uses the impulse responses which have different values between aligned and unaligned rotor position. In order to obtain the informations of the rotor position, the impulse applied to the unenergized phases and their responses are analyzed to control the speed of SRM without shaft sensor. Experimental results verify the feasibility of the proposed method.
이승철(Lee, Seung-Chul),박영록(Park, Young-Rock),이해평(Lee, Hae-Pyeong),박영주(Park, Young-Ju) 한국화재소방학회 2010 한국화재소방학회 학술대회 논문집 Vol.2010 No.추계
본 연구에서는 차량 연료탱크에 충격탄 관통 시 화재발생 여부를 분석하기 위한 연구의 전단계로서, 충격탄 속도 변화에 따른 연료탱크 내부의 유동특성을 분석하기 위해 전산유체역학기법을 도입하여 수치해석을 수행한 결과, 충격탄이 연료탱크 관통 시작부터 <TEX>$3.33{\times}10^{-6}ms$</TEX>와 <TEX>$145.01{\times}10^{-6}ms$</TEX> 경과 후, 최대속도는 각각 약 249.8m/s와 189.2m/s이며 최대 압력은 83.6kPa과 37.9kPa이다. 충격탄이 관통부로 유입되면서 급격한 압력변화가 발생함을 알 수 있었다.
이승철 ( Seung Chul Lee ),박영록 ( Young Rock Park ),박천수 ( Cheon Soo Park ) 대한설비관리학회 2010 대한설비관리학회지 Vol.15 No.1
This paper measured the temperature and the humidity of the air in the ceiling depending on the operation and non-operation of an air-conditioner and a ventilation system for ceilings only. It was found that: in case of the only air-conditioner on and ventilation off appropriate thermal environment was maintained in the swimming pool and in the ceiling; and in case of the air-conditioner off and the ventilation on the relative humidity in the ceiling was maintained under 62%, so it was concluded that dew condensation gives a no influence on the safety of the inside of the ceiling. In case of the air-conditioner off and the ventilation off the relative humidity of the air in the ceiling was increased to about 78%. In this paper the quantity of energy consumption, was also measured depending on the operation of the air-conditioner and the ventilation system. It was found that the energy consumed for the operation of the air-conditioner per hour was about 625 times greater than that of the ventilation system.
수치해석 격자 및 화원 위치가 도로 터널 임계속도 산정에 미치는 영향
이승철(Seung-Chul Lee),전우철(Woo-Chul Jeon),박영록(Young-Rock Park),승삼선(Sam-Sun Seung) 대한기계학회 2011 대한기계학회 춘추학술대회 Vol.2011 No.5
To estimate the critical velocity in road tunnel fire, this study calculated one-dimensional equation and conducted three-dimensional computational fluid dynamics, varying the grid number and the location of the fire source. 8 kinds of numerical analysis were carried out. The critical velocity in the target tunnel by one-dimensional way, 2.22 ㎧ was calculated, when hydraulic diameter was applied instead of the tunnel height. According to six numerical analysis, each grid number has different position, temperature, and CO concentration of backlayering. In the Case of the subject, 0.8 million grid was found to be the most ideal. According to three numerical analysis, the location of the fire source affect the critical velocity, through the different air velocity, temperature, and CO concentration distribution of each Case. This solution is considered to be caused by the different buoyancy force according to the density gradient of stratification.
모터 제어ㆍ감시를 위한 Monitoring Device 개발
정도영,박영록,심낙순,박종국,허규환 삼척대학교 산업과학기술연구소 2001 産業科學技術硏究論文集 Vol.6 No.1
A motor used as power source by factory has a relay panels up to recently. But they have the problems of operating and maintenance, such as mechanical contracts, etc. They also need some additional relays to check the over load, over currents and ground faults. But in the development of computers the relay panels to control motor are changed by electrical motor controllers with microprocessor or DSP. They can check the event, the over load, over currents and ground faults and also supervise the trend and state of operating. In this paper, a monitoring devices for the control and supervision of motor has been presented and developed.