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산업용 Ethernet을 이용한 PC기반 패널작업 보아시스템 구축
宋明現(Myung-Hyun Song),朴奎南(Kyu-Nam Park),韓東奇(Dong-Gi Han),禹奕在(Hyeok-Jae Woo),廉圭日(Gyu-Il Youm) 대한전기학회 2007 전기학회논문지 P Vol.56 No.2
In this paper, one type of a security system for panel working is suggested. The industrial Ethernet is used for open-close door control of the working panel and for monitoring the working panel is correct or not. Especially to upgrade the security system, a remote approval function of panel working by using the given approval number, a remote monitoring function for checking the approved panel is currently working or not, and an alarming function for keying the unapproved number or opening the disapproved panel, are added for preventing and reducing the intentional working error. Also the worker and working time are stored in PC automatically in exel file for detecting the working error. To show the possibility of suggested security system. two-working panel system is prepared and studied.
LabVIEW를 이용한 소형 유도전동기의 권선고장 자동진단
宋明現(Myung-Hyun Song),朴奎南(Kyu-Nam Park),韓東奇(Dong-Gi Han),禹奕在(Hyeok-Jae Woo) 대한전기학회 2006 전기학회논문지 P Vol.55 No.4
In this paper, an auto detection method of stator winding fault of small induction motor is suggested. The Park's vector pattern which is obtained from 3-phase current signal by d-q transforming, is very good to detect winding fault. Comparing the Park's vector pattern of testing motor with its of healthy motor, the Park's vector pattern of fault motor is became an ellipse and the asymmetry is increased by the winding fault serios. So for detecting the dis-symmetry, id-filtered function, Min-value, and Max-value are suggested for auto detecting. Using LabVIEW programing, 3-phase healthy motor and several kind of winding fault motors are tested and the test results are shown that the suggested method can gives us a possibility of an auto detecting winding fault.
LabVIEW를 이용한 휴대용 3상 소형유도전동기 회전자 바 고장 진단 시스템 개발
宋明現(Myung-Hyun Song),朴奎南(Kyu-Nam Park),韓東奇(Dong-Gi Han),李泰勳(Tae-Hun Lee),禹奕在(Hyeok-Jae Woo) 대한전기학회 2007 전기학회논문지 P Vol.56 No.1
In this paper, a portable rotor bar fault diagnosis system for small 3 phase induction motors is suggested. For portable real-tine diagnosis system, an USB- DAQ board for collecting the 3 phase current data, three current probes, and a notebook computer are used. The LabVIEW graphical language is used for filtering, analysis, storing, and monitoring the current data. The three phase stator current are filtered and transformed to frequency level by FFT. An analysis window programed by LabVIEW is located in front panel to show the FFT results and this suggested window has a zooming function to detect the fault feature more easily near the feature frequency range which is varying by the slip frequency. To show the possibility of portable rotor bar diagnosis system, three types(healthy, one rotor bar fault, two rotor bar fault) of rotor bar are intentionally prepared and compared by the suggested window of front panel. Experimental results are shown that a suggested diagnosis system is applicable to portable diagnosis system and the rotor bar fault is detected by the frequency window in front panel programed in LabVIEW graphical language.
2축 솔라셀 센서모듈을 이용한 태양광 추적시스템의 설계 · 제작
전우열(U-Yeol Jeon),강민정(Min-Jung Gang),이승환(Seung-Hwan Lee),김힘찬(Him-Chan Kim),문동윤(Dong-Youn Moon),김희수(Hee-Su Kim),손민정(Min-Jung Son),이지은(Ji-Eun Lee),이주현(Ju-Hyun Lee),우혁재(Hyeok-Jae Woo),신규재(Kyoo-Jae Shin) 대한전자공학회 2015 대한전자공학회 학술대회 Vol.2015 No.6
Solar tracking system has the asembly of remote servo control and remote monitoring. It is composed of solar illumination of the solar azimuth one solar cell sensor device for detecting a value and integrated control device including the integrated control panel for remote transmission by the wireless communication by the servo control and solar module assembly to follow the sun azimuth in response to the control signal. The proposed algorithm is verified through experimental results.