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고정자 전류 기반의 MRAC를 이용한 유도전동기의 센서리스 벡터제어에서 회전자 시정수의 보상
박철우(Chul-woo Park),윤경섭(Kyung-sup Youn),임성운(Sung-woon Im),구본호(Bon-ho Ku),권우현(Woo-hyen Kwon) 전력전자학회 2002 전력전자학술대회 논문집 Vol.- No.-
The thesis proposes the sensorless vector control method that estimates the rotor speed and rotor time constant at the same time using stator current In the proposed method, stator current error in the stationary reference frame is proportional to estimated speed error, and stator current error in the synchronous reference frame is proportional to estimated rotor time constant error The proposed method can simultaneously produce a fast speed estimation and rotor time constant estimation Therefore, this new method offers an improvement In the performance of a sensorless vector controller. And, the superiority of the proposed method is verified by simulation.
조내수(Nae-Soo Cho),윤경섭(Kyung-Sup Youn),최연호(Youn-Ho Choi),권우현(Woo-Hyen Kwon) 제어로봇시스템학회 2009 제어·로봇·시스템학회 논문지 Vol.15 No.7
The linear model following controller (LMFC) scheme controls a plant based on the output of a reference model, thereby replacing a PI controller that has better time response characteristics, which are irrelevant to the structural perturbation of a plant. However, the main weakness of the LMFC scheme is a slow response time to load changes. Thus, to solve this problem, a robust linear model following controller (RMFC) was developed that is robust in load changes. However, when compared with the LMFC scheme, the RMFC scheme has a weaker performance in the case of system parameter changes. Therefore, this paper presents a new LMFC scheme, where the controller is designed based on the output of a plant rather than the output of a model, as in the case of the conventional LMFC scheme. As a result, in the case of load changes, the response characteristics of the proposed scheme are slower than those of the RMFC scheme, yet faster than those of the conventional LMFC scheme, however, for parameter changes, the proposed scheme has a superior performance over the RMFC scheme. The usefulness of the proposed LMFC scheme is verified through a comparison using MATLAB/SIMULINK.
1차 지연회로를 사용한 ZVS Full-Bridge 컨버터 구동회로 설계 (pp.160-161)
조내수(Nae-Soo Cho),최연호(Youn-Ho Choi),윤경섭(Kyung-Sup Yoon),구본호(Bon-Ho Koo),권우현(Woo-Hyen Kwon) 대한전기학회 2009 정보 및 제어 심포지엄 논문집 Vol.2009 No.10
The full bridge converter have been used for high power system that is needed to switch the big current. So, EMI and stability problem is occurred, The soft switching method is the solution to solve the above problem, But implementation of soft switching(ZVS : zero voitage switching) is so complicate and expensive because of the DSP MCU and shift circuit. In this paper, we introduce the technical method for driving circuit of ZVS full bridge converter with delay circuit. The realization of this method is so simple and cheap.
1차 지연회로를 사용한 ZVS Full-Bridge 컨버터 구동회로 설계
조내수(Nae-Soo Cho),최연호(Youn-Ho Choi),윤경섭(Kyung-Sup Yoon),구본호(Bon-Ho Koo),권우현(Woo-Hyen Kwon) 대한전기학회 2010 전기학회논문지 Vol.59 No.3
The full bridge converter have been used for high power system that is needed to switch the big current. So, EMI and stability problem is occurred. The Soft switching method is the solution to solve the above problem, But implementation of soft switching(ZVS: Zero Voltage Switching) is so complicate and expensive because of the DSP MCU and shift circuit. In this paper, we introduce the technical method for driving circuit of ZVS full bridge converter with 1st order delay circuit and logic elements. The realization of this method is so simple and cheap. The effectiveness of the proposed circuit is verified by experimental results.
尹暻燮,具本鎬 慶一大學校 1995 論文集 Vol.12 No.2
This paper present the characteristics of a current controlled circuit under the RL load variation, and computer simulation is used to compare performance of hysteresis controller, ramp comparison controller and proposed controller. Simulation results show that hystersis controller could be used to low inductance system and ramp comparison controller could be used to high inductance system with higher performance than another. Proposed controller has two hysteresis bands and has extended performance than hystersis and ramp comparison controller where low inductance or low resistance conditions.
尹錫榮,尹暻燮,任成雲 慶一大學校 1996 論文集 Vol.13 No.2
The stabilization/tracking systems is a precision electro-mechanical gimbal assembly design to isolated the load from its environment and point the payload toward the moving target. This paper describe the design procudure and evaluation of precision servos to be used in a moving target tracking and line of sight stabilization. The conventional frequency compensator design approach is to develop a stabilization system to minimize inertial line of sight jitter and the design a tracking system to control the direction. Simulations and frequency characteristics measurement results show that the tuned controller parameters satisfy robustness and stability margin prescribed performance specifications.