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- 저자 : 김덕헌(Duk-Heon Kim) (검색결과 11 건)
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김재문(Kim Jae-Moon),김덕헌(Kim Duk-Heon),김연충(Kim Yeon-Chung),이상석(Lee Sang-Seok),신승권(Shin Seung-Kwon) 한국철도학회 2005 한국철도학회 학술발표대회논문집 Vol.- No.-
This paper describes the development of the auxiliary power supply simulator for electric rolling stock. Auxiliary power supplies are required for operating air conditioning units, ventilation fans, lighting and battery charging. From the baseline model of the SIV(Static InVerter) for electric rolling stock, we designed the scale down model of the auxiliary power supply simulator consisting of IGBT voltage source inverter. Auxiliary power supply simulator can be used educatory purpose to teach efficiently about operating principles of SIV
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윤용호(Yong-Ho Yoon),김재문(Jae-Moon Kim),김덕헌(Duk-Heon Kim),원충연(Chung-Yuen Won) 대한전기학회 2011 전기학회논문지 Vol.60 No.10
BLDC motor is used in a wide variety of industrial and servo applications. Its features and advantages mainly consist in high value of torque/inertia ratio, high efficiency with speed range and high dynamic performance. This paper deals with the speed control of a trapezoidal type brushless DC motor using Fuzzy PI controller. The conventional PI controller has been widely used in industrial applications. If we select a optimal PI control gain, the PI controller shows very good control performance. But it is very difficult to find the optimal PI control gain. Fuzzy control does not need any model of plant and is basically adaptive and gives robust performance for plant parameter variation. Therefore the combinations of conventional PI controller and fuzzy controller seem to be very effective. This paper deals with PI controller with 4-rule based fuzzy controller. The proposed fuzzy PI controller increases the control performance of the conventional PI controller. Simulation and experimental results show that fuzzy PI controller has a good robustness regarding the improper tuned PI controller.
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유도전동기 위치제어를 위한 유전 알고리즘을 이용한 퍼지-슬라이딩 모우드 제어기
김덕헌 가톨릭상지전문대학 1997 논문집 Vol.27 No.1
Recently, sliding mode control has been widely used in induction motor servo drives. It provides attractive features such as fast dynamic response, insensitivity to variations in plant parameters and external disturbance. However, one difficult problem for which the sliding mode controlled servo system has not yet been popular is due to chattering and long settling time. This paper presents a new fuzzy-sliding mode controller for a vector-controlled induction motor servo system not only to shorten the settling time but to practically eliminate the chattering problem. In conventional sliding mode strategy, the reference trajectory is linear function on a phase plane. Consequently, the variables are exponential function of time, which means that the slate may reach the origin very slowly. To shorten the flight lime, reference trajectory of fuzzy-sliding mode controller is nonlinear function on a phase plane. The basic idea of design method of fuzzy controller is described based on sliding mode control. The control is composed of equivalent control and switched control. To determine the switched control signal current, we use fuzzy logic method for chattering elimination. However, a systematic method for tuning the normalization parameters of fuzzy logic controller is not developed yet. In this paper, an auto-tuning method for fuzzy controller based on the genetic algorithm is presented. To optimize the well-chosen objective function(fitness function), normalization parameters are transformed into binnary bit-strings which are Processed by the genetic algorithm. The servo system with the proposed control staregy was analyzed by simulation.
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元忠淵,梁承浩,金德憲,金世燦 成均館大學校 科學技術硏究所 1992 論文集 Vol.42 No.2
In this paper, the authors describe the equivalent circuit for a DC motor in consideration of both magnetic saturation and armature reaction phenomena. To develop DC motor model in PSPICE is to eliminate the gap between drive electronics and models of driven machine. On the basis of these results the dynamic characteristics of a MOSFET chopper controlled DC series motor are investigated by PSPICE simulation and experiment.
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전력전자 PSPICE 컴퓨터 시뮬레이션을 위한 스위치 모델
元忠淵,金淵俊,金世燦,金德憲 成均館大學校 科學技術硏究所 1990 論文集 Vol.41 No.2
PSPICE is widely used in analysis of general circuit and simulation in electric and electrical field is applied to power electronics circuit. The circuits used with thyristors will add significant complexity to PSPICE analysis, it is important that the thyristor model be as simple as possible. In order to solve this problem, an ideal voltage controlled switch and an ideal current controlled switch were added as circuit elements. Two typical power electronics circuits simulation using PSPICE program presented.
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