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誘導 電動機의 電源 周波數 可變에 의한 最適 制御에 관한 硏究
李五杰,李浚析,鄭基和,禹靖仁 동아대학교 공과대학 부설 한국자원개발연구소 1990 硏究報告 Vol.14 No.1
In general, unstable phenomena of induction motor are oftenly appeared at low speed and light load. This paper discribes eigenic unstable regions of I.M. itself by computer simulations and the results are Compared to experimental ones. And also the Optimal design parameters of I.M. which the un-stable region can be minimized are determined.
쌍선형 유도기 모델을 위한 최적 안정화 제어기 설계에 관한 연구
李泰基,李五杰,禹靖仁,李浚柝 東義大學校産業技術開發硏究所 1992 産業技術硏究誌 Vol.6 No.-
An optimal Stabilization Technique for a bilinear induction motor model is introduced. This technique includes two parts ; the one is an stabilization control using Lyapunov Function which has the form of a sum of liner and quadratic function of the state variables, and the other is an optimalizing control using the performance index which depends on the choice of the elements of the Lyapunov matrices. Therefore, induction moter is drived with the smaller overshoot of the ones, simulation results are obtained from a digital computer.
誘導電動機의 抵速輕負荷 運轉時 不安定 領域과 파라메터의 最適設計에 關한 硏究
李泰基,李浚析,李五杰 東義大學校産業技術開發硏究所 1990 産業技術硏究誌 Vol.4 No.-
In general, unstable phenomena of induction motor are oftenly appeared at low speed and light load. This paper discribes eigenic unstable regions of induction motor itself by computer simulations and the results compared to experimental ones. And also the optimal design parameters of induction motor which the unstable region can be minimized are determined.
Fuzzy 제어기를 이용한 외란부가 Servo System 제어
정형환,김태우,이오걸,이준탁 東亞大學校 1991 東亞論叢 Vol.28 No.1
A servo system requires faster and more accurate dynamic responses. Generally a PD control is mai-nly used to obtain the precision, and in the other hand a fuzzy control to improve the transient respo-nse and to cope with the nonlinearity of systems. Recently hybrid control, which is attempted to combine the advantages of PD control and a Fuzzy control was proposed, but this technique requires complicate design procedures. Therefore in this paper, a fuzzy controller with a series of membership functions and various sampling periods and rules, was designed on the basis of Lyapunov stability theory and auto tuning methods of imput scale factors using the proposed windowing techniques. And also it was showed to have the excellent adaptive performacnes against internal-external disturbances and the usefulness of this controller from the results of simulations.
李五杰,李泰基 東義大學校産業技術開發硏究所 1990 産業技術硏究誌 Vol.4 No.-
A constant V/F control systems of voltage controlled PWN inverter has a unstable operation at the low speed and the light load. In this paper, the authors propose stability control with idealized operation of induction motor by the neglect of primary leakage inductance and reactance. Also idealized operation system is adopted voltage error, feed back impedance circuit, and increasing resistance from dead time of switching is compensated by the software with micro processors. The proposed simulation of the idealized control mathod is proved at the low-speed operation for three phase induction motor.
可變構造 制御理論에 의한 永久磁石 同期電動機의 位置制御
이태기,최영곤,이오걸,이준탁 東義大學校産業技術開發硏究所 1991 産業技術硏究誌 Vol.5 No.-
Variable Structure System(VSS) theory based on discrete control inputs is expected to be a powerful and potential tool to construct a new control strategy for drives of AC machinery and induristrial equipments. This paper discusses the application of VSS to position control of permanent magnet synchronous motor(PMSM), and presents a sliding mode control method based on “instantaneous current control”and “vector control”for AC servo system of PMSM. ON-OFF pattern for switching devices are generated directly by VSS and the robustness is obtained in total system including the inverter part. To show validity of the proposed control method, An experimental system is built and tested. In spite of straightforward application, the resulting system shows robust performance to parametric variation and disturbances. This approach is suited for a nonlinear plant such as a NC system, direct-drive robot arm, etc.