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부하토크 피드포워도 제어를 이용한 유도전동기의 속도제어
서영수(Young-Soo Seo),임영배(Young-Bae Lim),김영춘(Young-Chun Kim),성대용(Dae-Yong Sung),김종균(Jong Gyun Kim) 전력전자학회 1997 전력전자학술대회 논문집 Vol.1997 No.-
This thesis proposed a speed control system for induction motors robust to variations in torque and parameters by feeldorward compensating the current portion of load torque adding a load torque observer to the conventional PI controller in the indirect vector controlled induction motor system.<br/> In conclusion, this thesis demonstrate the improved transient characteristic to variations in reference speed and load torque, compared to the conventional PI control method, by means of the feedforward control of the estimated load torque.
직류 전동기의 속도 토크 제어를 위한 부하 전류 관측기 설계
서영수(Young-Soo Seo),김은기(Eun-Gi Kim),김용주(Yong-Ju Kim) 전력전자학회 2001 전력전자학술대회 논문집 Vol.2001 No.7
In this paper, the Load Current Observer Design for 3-phase Voltage Type PWM Converter with DC Moter Load. The sinusoidal input current and unity input power factor are realised based on the estimated source voltage performed by the Load Current Observer using actual currents and DC link voltage.
Hyperstable MRAS 방식의 속도추정을 위한 벡터제어
서영수(Young-Soo Seo),김은기(Eun-Gi Kim),김용주(Yong-Ju Kim),김영진(Young-Jin Kim) 전력전자학회 2001 전력전자학술대회 논문집 Vol.2001 No.7
When the vector control, which does not need a speed signal from a mechanical speed sensor, it is possible to reduce the cost of the control equipment and to improve the control performance in many industrial application.<br/> In this paper, describes a rotor speed estimate method of induction motor based on the theory of counter EMF MRAS. This method eliminated the pure integrator, and we can be expected to rapid responsibility of the speed identification Therefore, we improve the initial condition of the integrator and drift problem The stability of speed estimator is proved on the basis of hyperstability theory. In order to confirm the performance of the proposed system, Simulation and experiment is performed.