A Study on the Low Speed Operation of Space Vector Using Disturbance Observer 


Vol. 45,  No. 10, pp. 1749-1755, Oct.  2020
10.7840/kics.2020.45.10.1749


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  Abstract

In this paper, an algorithm has been employed which estimates magnetic flux using a voltage/current model combined magnetic flux estimator and from this result estimates magnetic flux angle for the purpose of stably controlling the speed of induction motor across all areas from the low-speed drive area to the high-speed drive area. The proposed observer has simply performed the system configuration by applying the reduced order state observer to estimation of load torque to use it for estimation of speed and also enabled accurate estimation of instantaneous speed in the very-low-speed area. An induction motor speed controller has been presented which is strong against load disturbance, modeling error, measurement noise, etc. without reducing the influence of system noise and changing the poles of the observer. Also, an improved magnetic flux estimation method with high precision has been used by introducing the vector control system that estimates the speed of the motor’s rotator based on the theory of FMRAS (Flux Model Reference Adaptive System) for speed control of the induction motor and the error compensation algorithm of magnetic flux estimator which uses voltage model magnetic flux estimator and closed loop integration method to improve operation characteristics of speed-sensorless vector control. The possibility for the proposed control algorithm has been reviewed through simulations and the validity of the theory has been verified through experiments. The result has shown that the speed ripple caused by delay in speed detection in the very-low-speed area has been reduced compared to that of the existing PI(Proportional-Integral) control method and its transient characteristics are superior for the standard speed or changes in the load torque.

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  Cite this article

[IEEE Style]

S. Na, Y. Jeong, Y. An, "A Study on the Low Speed Operation of Space Vector Using Disturbance Observer," The Journal of Korean Institute of Communications and Information Sciences, vol. 45, no. 10, pp. 1749-1755, 2020. DOI: 10.7840/kics.2020.45.10.1749.

[ACM Style]

Seung-Kwon Na, Yeon-Man Jeong, and Yong-Gil An. 2020. A Study on the Low Speed Operation of Space Vector Using Disturbance Observer. The Journal of Korean Institute of Communications and Information Sciences, 45, 10, (2020), 1749-1755. DOI: 10.7840/kics.2020.45.10.1749.

[KICS Style]

Seung-Kwon Na, Yeon-Man Jeong, Yong-Gil An, "A Study on the Low Speed Operation of Space Vector Using Disturbance Observer," The Journal of Korean Institute of Communications and Information Sciences, vol. 45, no. 10, pp. 1749-1755, 10. 2020. (https://doi.org/10.7840/kics.2020.45.10.1749)

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pISSN : 1226 - 4717
eISSN : 2287 - 3880