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전압강하 보상 알고리즘을 이용한 AC Drive 제어기법에 관한 연구
박종제(Jong-Je Park),김희선(Hee-Sun Kim),윤홍민(Hong-Min Yun),나승호(Seung-Ho Na) 전력전자학회 2011 전력전자학술대회 논문집 Vol.2011 No.7
본 논문에서는 순간정전 발생시 전압강하 보상 알고리즘을 통하여 AC Drive의 신뢰성을 높이는 제어 기법들에 대해 알아본다. 부하 특성에 따라 제어 기법이 나누어 지며 각각 제어 기법은 시뮬레이션 및 시험을 통해 그 타당성을 검증 하였다.
3레벨 NPC인버터 고장 시 중성점 전압변동에 관한 연구
박종제(Jong-Je Park),김태진(Tae-Jin kim),현동석(Dong-Seok Hyun) 전력전자학회 2008 전력전자학술대회 논문집 Vol.- No.-
Three-level Diode Clamped Multilevel Inverter, generally known as Neutral-Point-Clamped(NPC) inverter, has an inherent problem causing Neutral Point(NP) potential variation. Until now, in many literatures NP potential problem has been investigated and lots of solutions have also been proposed. However, in the case of NP potential variation was rarely published from the standpoint of reliability. In this paper, NP potential is analytically investigated both normal and fault conditions under carrier based PWM. Subsequently, relation between fault detection time and size of capacitor is analyzed. This information is explored by simulation results, which contribute to enhance the reliability of the NPC inverter system.
김종혁(Jong-Hyouck Kim),남윤주(Yun-Joo Nam),박종제(Jong-Je Park),박명관(Myeong-Kwan Park) 대한기계학회 2007 대한기계학회 춘추학술대회 Vol.2007 No.10
This paper is concerned with a haptic hand master intended to display force feedback at the fingertip of the human user. The haptic hand master, named 'Haptic Mouse' has two significant differences from previous other hand masters: actuators and structure. Five passive actuators featured with magneto-rheological fluid is used to ensure the interface safety and the control stability. In order to eliminate the unnecessary reaction force and reduce muscular fatigue while operating, the mouse-like structure is adapted. Also, two assumptions are proposed for the simplicity of the kinematics and manufacturing; one is that the fingertips lies on a plane while grasping the objects, and the other is that the equilibrium point of the fingertip reaction forces is in the object. Due to these characteristics, the human hand operating the haptic mouse has the kinematic configuration similar to a 5-dof parallel manipulator.