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우정인,김춘삼,박지호,김영빈 동아대학교 생산기술연구소 1999 生産技術硏究所硏究論文集 Vol.4 No.2
This paper deals with a novel full digital control method of the three-phase PWM inverter for UPS. In this paper, the voltage and current of output filter capacitor as state variables are the feedback control input, and a double deadbeat control consisting of a d-q current minor loop and a d-q voltage major loop, both with precise decoupling, have been developed. The switching pulse width based SVM is adopted so that the capacitor current is been exactly equal to its reference current. To compensate the calculation time delay, the predictive control is achieved by the full order state observer. The load prediction is used to compensate the load disturbance by disturbance observer with deadbeat reponse. In addition, a new control algorithm is proposed to suppress the fluctuation of dc link voltage at a abrupt variation of load current.
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외란관측기를 사용한 복합형능동전력필터의 Deadbeat제어에 관한 연구
우정인,박지호,김영빈,문백영 東亞大學校 2000 東亞論叢 Vol.37 No.-
When LC filter is connected parallel to the Active Power Filter, a problem of the resonance between the Active Power Filter(AF) and LC filter often arises. In this paper, deadbeat control of Hybrid Active Power Filter using Disturbance-observer is introduced to solve this problem. By the estimation of the harmonics disturbance using proposed disturbance observer, the compensation characteristics of the AF is improved and the resonant current is suppressed. The validity of proposed disturbance observer is verified from simulation results using PSIM.
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공간벡터변조에 의한 반송용 편측식 선형유도전동기의 동특성에 관한 연구
우정인,조윤현,조용길,신동률,정영일 동아대학교 공과대학부설 생산기술연구소 1997 生産技術硏究所硏究論文集 Vol.2 No.2
A Single-sided Linear Induction Motor(SLIM) has been developed for use in industrial machines, transportation, application to automations, because it has merits of direct driving and simple structure. The SLIM for conveyer system requires a soft start and stop, and no shock drive. The air gap of SLIM is large and the fluctuation of its distance while being operated has significant effect on the thrust of SLIM and cause the thrust ripple. Mecause of the effect of this thrust ripple, it is difficult to control the speed of SLIM precisely. In order to improve the problems maintenance above, in this paper, the Space Vector Modulation (SVM) with PI controller is proposed, which offers the dynamic characteristics of SLIM without the thrust ripple.
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2次 近似에 의한 D·C 電動機의 速度 및 位置豫測 制御에 관한 硏究
禹靖仁,趙顯文 동아대학교 공과대학 부설 한국자원개발연구소 1985 硏究報告 Vol.9 No.1
This paper deal with predict control of speed and position in PID method with microprocessor, and present predict method using the principale of Tayler Series because digital control system based microprocessor have delay time in sampling period. The effect of predict control for speed and position was confirmed through experimental result. It has been redued under 1-degree of position error in breaking by using predict position and straigtaway decelerator In speed control applied predict speed, Overshoot can be reduced under 2%.
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