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- 저자 : Soo Hyun Baek ) (검색결과 1,346 건)
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VCR用 DD캡스턴 모터의 特性 改善을 위한 設計製作 硏究
白壽鉉,任泰彬 東國大學校 1991 東國論叢 Vol.30 No.-
The DD capstan motor for VCR must be designed fast and adaptively as a small, light and slim type and have the high accuracy of control characteristic because the life cycle of its applying machinery has become shorter and it requires high accuracy of control characteristic. In this study, the design theory of the electric and magnetic parts for DD captan motor for VCR is systematized. Also the design theory and manufacturing method of MR sensor device as a speed detector is presented to enhance the accuracy of speed control, and the flux density of permanent magnet is made uniformly so as to magnetize the super multi-poles and as that result the FG with a high output and high accuracy can be designed and manufactured, which has 0.2% maximum fluctuation of the frequency and -60 dB minimum ratio of S/N. Applying these results to the design of DD capstan motor for VCR, the excellency of this can be proved.
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스위칭 함수를 이용한 3상 전압원 인버터의 모델링 및 특성해석
백수현,김용,박철현 동국대학교 산업기술연구원 1996 산업기술논문집 Vol.8 No.-
Static power converters can be analyzed by means of available simulation software packages such as PSPICE. This paper proposes the macro models developing technique for three-phase power converters using the transfer function approach. Also, These models were based on converter switching functions rater than actual circuit configuration. In this approach, SPWM VSI(Voltage Source Inverter) was simulated as multiport networks avoiding nonlinear macromodels of the power switches. Also, Output phase voltage and line-to-line voltage of VSI have been verified experimentally.
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PWM인버터로 驅動되는 誘導電動機의 特性解析을 위한 等價回路
白壽鉉,金龍,金必洙 東國大學校 1990 論文集 Vol.29 No.-
This paper discussed a calculation method of characteristics of induction motor supplied from PWM Voltage Source Inverter. This proposed calculation method based on equivalent circuit of induction motor for fundamental(T-type) and higher harmonics. Using this calculation method, we can analyze more closety to measured value than conventional method through experimental varification.
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백수현,김일남 동국대학교 산업기술환경대학원 1998 산업기술논총 Vol.4 No.-
The thrust force of moving magnet-type linear direct current motors (MM-LDM) is analyzed in this paper. One method for calculating the thrust force of an MM-LDM is to analyze the energy gradient by the distribution of magnetic flux. However, this method is very difficult to calculate the thrust force. The MM-LDM can be considered a transformer in which the magnet of the mover is assumed to be a one-turn coil carrying a large current. The stored energy in the MM-LDM can be obtained by measuring its self-inductance and mutual-inductance. Calculating the gradient of the stored energy gives rise to the thrust force.
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白壽鉉,金龍,金必洙 동국대학교 대학원 1991 大學院硏究論集-東國大學校 大學院 Vol.21 No.-
In this paper, a unifies thyristor model for power electronic circuit simulations using SPICE is presented. By using this unified thyristor model, we can simulate various characteristic of some circuits more reasonably, accurately. Some simulations using high-power thyristor device(GE C 602LM) has been investigated in order to demonstrate the benefits of the proposed SPICE thyristor model.
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白壽鉉 동국대학교 1985 論文集 Vol.24 No.-
This paper proposes the approach of design the optimal tracking control system for induction motors. For this, transforms 3-phase induction motor into 2-phase motor, using d·q axis transformation. After linearize the non-linear state equation of inuction motor which is obtained from 2-phase induction motor model, applied this optimal tracking control system to the linearized system. And these results are compared to the results which are obtained by augmented optimal regulator theory.
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正弦波 PWM 인버터로 驅動되는 誘導電動機의 等價回路 定數算定
白壽鉉,金必洙 東國大學校 1991 東國論叢 Vol.30 No.-
In this paper, a new estimation method of equivalent circuit parameters for Induction Motor supplied from Sinusoidal Pulse Width Modulation(SPWM) Inverter is presented. This proposed estimation method based on T-type equivalent circuit by the sinusoidal wave source measured easily, using a some experimental apparatus such as digital power meter (DPM) without harmonic equivalent circuit estimation method. Finally, experimental verification of both this proposed estimation method and harmonic equivalent circuit estimation method was performed on a 2.2〔Kw〕 squirrel-cage induction motor.
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가동 자석형 LDM의 고속 위치제어계 구성에 관한 연구
白壽鉉,金龍,孟仁在 동국대학교 산업기술연구원 1995 산업기술논문집 Vol.6 No.-
본 논문에서는 LDM(Linear DC Motor)의 고속 위치제어를 실현하기 위해, 최단시간 제어이론을 도입하였으며, 복잡한 비선형함수의 계산을 피하고, 제안된 이론을 실현하기 위해 위상평면상에 설정한 포물선 형태의 스위칭함수상에서 뱅뱅제어를 통해 최적절환을 행하였다. 시스템의 모델링 오차와 파라미터의 변동에 의해 슬라이딩 모드가 발생하므로, 슬라이딩 모드가 발생하는 구간을 최소화시키기 위해 포물선형 스위칭함수를 반복실험을 통해 수정하였다. 결과적으로 최단시간 제어이론이 스위칭함수를 수정함으로써 실현되었으며, 스위칭함수를 수정하기 위한 알고리즘을 제안하였다. In this paper, to realize high speed position control of LDM (Linear DC Motor), the minimum time control method is applied. But, In this control method, calculation of non-linear function is required. Therefore, in order to avoid this complex calculation, optimum switching of the Bang-Bang control is done on parabola type switching function established in the plane of phase. But, the sliding mode is occurred due to the modeling error of LDM and the variation of parameters. Thereby, the optimum control is not realized. Therefore, for minimizing sliding section with sliding modes condition considering, the parabola type switching function is modified by repeat of experiment. As the result, minimum time control is realized by amended switching function. So, the algorithm to modify switching function is proposed.
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回轉子 쵸퍼로 制御되는 슬립·링 誘導電動機 閉루우프系의 試作 및 特性解析
白壽鉉 동국대학교 1986 論文集 Vol.25 No.-
슬립·링 誘導電動機 回轉子側에 브리지整流回路, 휠터回路 및 改善된 쵸퍼回路를 연결하여 듀티比에 따른 슬립·링 誘導電動機의 速度制御特性을 向上시키고자 閉루우프 速度制御系를 設計, 試作한 硏究이다. 좀 더 양호한 速度變動率과 速應性을 갖도록 設計한 閉루우프制御系를 동작점 근방에서 小信號動搖모델로 전개하여 動的應答을 구한 이론결과는 실험결과와 잘 부합되었다. 그러므로 본 연구에서 제시한 理論解法은 얻고자 하는 應答特性을 갖도록 閉루우프 制御系를 設計, 解析하는데 유효하게 쓰여질 것으로 기대되며 比例積分器의 성능에 따라서는 速度變動率을 거의 없앨 수 있음을 알았다. This paper is designed and implemented to improve variable speed drive of slip-ring Induction motor(SRIM) with connecting bridge rectifier, developed chopper circuit and filter to the rotor side of SRIM. The closed loop system is designed and implemented to obtain a better speed regulation and fast response. A small signal dynamic model is developed around the given steady-state operating point and its theoretical results are coincided with experimental results. This small signal model for small purturbations of input signals is expected to be useful in designing a closed loop controller with predictable performance. The dynamic performance is very much improved with speed and current feedback and speed regulation can be almost zero with PI controllers.
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