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3상 AC/DC 스위치 모드 승압형 컨버터를 이용한 CO₂아크 용접기 역률개선에 관한 연구
이정훈(J.H.LEE),김재문(J.M.KIM),안정준(J.J.AHN),이상석(S.S.LEE),원충연(C.Y.WON),김세찬(S.C.KIM) 전력전자학회 1998 전력전자학술대회 논문집 Vol.- No.-
In this paper A switch mode AC/DC three phase boost converter with high power factor and sinusoidal input current waveform is analyzed and simulated. The proposed converter retain high power factor and sinusoidal input current waveform even under electric arc welder load. It is shown that experimental result and simulation waveform yield a sinusoidal input current waveform ant high power factor.<br/> <br/>
PWM 인버터-유도전동기 구동시스템의 전도노이즈 예측에 관한 연구
이진환(J. H. Lee),안정준(J. J. Ahn),원충연(C. Y. Wan),김영석(Y. S. Kim),최세완(S. W. Chat) 전력전자학회 1999 전력전자학술대회 논문집 Vol.1999 No.7
In this paper, an inverter fed induction motor drive system is analyed m order to predict the conducted interference. High frequency model for inverter, motor and system parasitic components are proposed. High frequency component allows time and frequency domain analysis to be performed with standard PSpice tool. The overall high frequency component and model are verified by comparing simulation and experimental result.
6고조파 주입 PWM을 이용한 3상 승압형 컨버터 고조파저감
이정훈(J. H. Lee),김재문(J. M. Kim),안정준(J. J. Ahn),이정호(J. H. Lee),원충연(C. Y. Won),정동효(D. H. Jung) 전력전자학회 1999 전력전자학술대회 논문집 Vol.1999 No.7
In this paper, six harmonic injection PWM method for reducing total harmonic distortion in single switch three phase discontinuous conduction mode boost converter is presented In the proposed method, periodic six harmonic voltage is injected m the control circuit to vary the duty ratio of the converter switch within a line cycle so that the fifth order harmonic of the input current is reduced. Experimental results are verified by converter operating at 400V/6kW with three phase 140V-220V input.
RPWM기법을 이용한 3상 승압형 컨버터 전도노이즈 저감
정태환(T.H.Jung),안정준(J.J.Ahn),이정호(J.H.Lee),원충연(C.Y.Won),김영석(Y.S.Kim),최세완(S.W.Choi) 전력전자학회 1999 전력전자학술대회 논문집 Vol.- No.-
In this paper Random PWM method for reducing conducted EMI in single switch three phase discontinuous conduction mode boost converter is presented. Random PWM control, by which the switching noise spectrum is smoothed and its level is reduced, is proprsed. Experimental results are verified by converter operating at 300V/1kw with 5%~30% white moise input.
능동 클램프 ZVS 플라이백 컨버터의 역률개선에 관한 연구
최태영(T.Y.Choi),안정준(J.J.Ahn),류동균(D.K.Ryu),이우석(W.S.Lee),원충연(C.Y.Won),김수석(S.S.Kim) 전력전자학회 2001 전력전자학술대회 논문집 Vol.2001 No.7
This paper analyzed PFC of active clamp ZVS flyback converter by adding two method PFC (Power Factor Correction) circuit - Two-Stage and Single-Stage.<br/> It improves on Flyback converter's disadvantage - loss increasing by switching, noise increasing, high voltage stress of switch - by adding active clamp circuit. Simulation results show to improve the input PF of 300W ZVS flyback converter by adding Single-Stage, Two-Stage PFC circuit.
상엽수확고(桑葉收穫高) 측정(測定)에 관(關)한 연구(硏究) -각형질(各形質) 가중치(加重値)(Weight)에 의(依)한 수량(收量)의 측정(測定)-
한경수 ( K. S. Han ),장권열 ( K. Y Chang ),안정준 ( J. J. Ahn ) 한국잠사학회 1969 한국잠사곤충학회지 Vol.9 No.-
상엽의 수확고를 측정하기 위하여 상엽의 수량과 높음 상관관계가 있는 형질 중 상전에서 쉽게 측정할 수 있는 기조장(X1), 기조직경(X2), 엽수(X3), 엽면적(X4)의 4개 형질을 측정하여 이들 형질의 수량에 영향하는 가중치를 다중회분방정식에 의하여 산출하여 수량을 측정할 수 있도록 여러 가지 식을 유도하였다. 1. 기조장(X1)과 기조직경(X2)을 측정하여 수량을 측정하기 위하여는 개량서반에 있어서는 y1v1=-1.15760+0.068X1+165.756X2(g) 일지뢰에 있어서는 y1v2=-221.500+1.768X1+38.152X2(g) 노상에 있어서는 y1v2=-253.826-0.116X1+289.507X(g) 수원상 4호에 있어서는 y1v4=-157.559+1.063X1+106.088X2(g)의 식에 의해서 기조장(X1)과 기조직경(X2)의 측정치를 대입하면 수량을 견적할 수 있다. 2. 기조장(X1), 기조직경(X2), 엽수(X3)의 3개 형질을 측정하여 수량을 견적하는 데는 각품종별로 각각 y2v1=-118.478-0.665X1+184.445X2+2.346X3 y2v2=217.432+2.062X3+35.668X2-1.058X3 y2v3=-206.249-0.739X1+268.08X2+2.770X3 y2v4=-153.383+0.009X1+2.024X2+0.171X3의 식에 의하여 수량을 견적할 수 있다. 3. 기조장(X1), 기조직경(X2), 엽수(X3), 엽면적(X4)의 4개 형질을 측정하고 수량을 견적하기 위하여는 각품종별로 각각 y11v1=82.567-1.283X1+15.501X2+0.640X3+3.511X4 y11v2=136.411+0.311X1+1.921X2-0.217X3+0.214X4 y11v3=150.2Z7-0.139X1+11.788X2+0.143X3+0.381X4 y11v4=160.850+0.323X1+66.076X2-0.794X3+2.614X4 등의 식에 의하여 수량을 견적할 수 있다. Various formulae for estimation of leaf production in mulberry trees were investigated and obtained. Four varieties of mulberry trees were used as the materials, and four characters, namely branch length (X, 1), branch diameter (X, 2), leaf number per branch (X, 3), and leaf area per branch (X, 4), were studies. The formulae to eatimate the leaf yield of mulberry trees are as follows: 1. Y1v1=-115.760+0.068X1+165.756X2 Y1v2=-221.500+1.768X1+38.152X2 Y1v8=-253.826-0.116X1+289.507X2 Y1v4=-157.559+1.063X1+106.088X2 where Y1v1, Y1v2, Y1v3, Y1v4, are showed the estimated yield of the each variety, namely Gaeryang souban, Ilchirye, Nosang, and Suwon Sang No. 4, respectively. X2 and X2 denote the measured values of branch length and branch diameter, respectively. 2. Y2v1=-118.478-0.665X1+184.445X2+2.346X3 Y2v2=-217.432+2.062X1+35.668X2-1.058X3 Y2v3=-206.249-0.739X1+268.08X2+2.770X3 Y2v4=-153.383+0.009X1+2.024X2+0.171X3 where Y2v1, Y2v2, Y2v3, Y7v4, are the estimated yield of the each variety, namely Gaeryang. Souban, Ilchirye, Nosang, and Suwon Sang No. 4, respectively. X1, X2, X3, denote the measured values of each character, branch length, branch diameter and leaf number per branch, respectively. 3. Y11v1=82.567-1.283X1+15.501X2+0.640X3+3.511X4 Y11v2=136.411+0.311X1+1.921X2-0.217X3+0.214X4 Y113v=150.227-0.139X1+11.788X2+0.143X3+0.381X4 Y11v4=-160.850+0.323X1+66.076X2-0.794X3+2.614X4 where Y11v1, Y11v2, Y11v3, Y11v4, are the estimated yield values of four varieties, and X1, X2, X3, X4 denote the measured values of four characters, namely branch length, branch diameter, leaf number per branch and leaf area per branch, respectively. The estimation method of mulberry leaf yield by measurement of some characters, branch length, branch diameter, leaf number per branch and leaf area per branch, could be the better method to determine the leaf yield of mulberry trees without destroying the leaves and without weighting the leaves of mulberry trees than the other methods.
인버터 시스템 진단을 위한 모니터링 알고리즘 구현에 관한 연구
안웅상,김연충,안정준,원충연,강기호 성균관대학교 1998 학술회의지원논문목록집 Vol.1998 No.-
In this paper, we carried out investigation of monitoring algorithm development for examination of invester system. For transmiting data, RS-422C is adopted. The LabWindows/CVI development tool of National Instruments Co. is used for the formation of monitoring scree. The experimental set-up is composed of a PC to PC system. It is applicable to electric car inspection and repair.
3상 AC/DC 스위치 모드 승압형 컨버터를 이용한 CO₂아크 용접기 역률개선에 관한 연구
이정훈,김재문,안정준,이상석,원충연,김세찬 성균관대학교 1998 학술회의지원논문목록집 Vol.1998 No.-
In this paper A switched made AC/DC three phase boost converter witli high power factor and sinusoidal input current waveform is analyzrd and simulatetion. The proposed conventer retain high power factor and sinusoidal input current waveform even under electric arc welder load. It is shown that experimental result and simulation waveform yield a sinusoidal input current waveform at high power factor.