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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.
Digital Control of Three-Phase UPS Inverter using Internal Model
Woo, J.I.,Cho, Y.G.,Jung, Y.I.,Park J.H.,Seo, J.K. 동아대학교 생산기술연구소 1999 生産技術硏究所硏究論文集 Vol.4 No.1
This paper deals with the novel digital control of the three phase PWM(Pulse Width Modulation) inverter for UPS(Uninterruptible Power Supply). In this paper, the voltage and current of output filter capacitor as a state variable are the feedback control input, and the switching pulse width is adopted by deadbeat control so that the output voltage is been exactly equal to the reference voltage. Especially, this paper proposes internal model in order to improve the performance deterioration of deadbeat control caused by the parameter variation.