Disturbance Observer Design for Controlling the Speed of Three Phase Induction Motor

Josaphat Pramudijanto

Abstract

Induction Motor is a type of motor that is most widely used in industry compared to other electrical motors,  because this type of motor has several advantages such as construction simplicity, sturdiness, cheap prices and low maintenance need. But the main challenge is to keep the speed remain constant when the induction motor is given many various values of load until particular value of the load nominal is given, so the response of the motor will change varily even if a controller has been given, thus controlling the speed of three phase induction motor is much more difficult to do. Therefore, in this research, we applied Disturbance Observer (DOB) method using Proportional Integral Derivative (PID) controller. This method was chosen because it can automatically reduce or even eliminate the disturbance, which is in the form of load and the measurement noise. The use of PID controller was expected to enhance the motor’s time settling. The test result of the Disturbance Observer method shows that it can reduce the measurement noise in every loading scenario. While the simulation result shows that the response of PID controller + DOB are capable of approaching the nominal load response with a response specification of 0.1 % of plant error, overshoot or undershoot of 1.5 %, time settling (ts) 5 % by 7.1 seconds and time rises (tr) of 2.2 seconds.

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References

Semit, Arwanjer, “Perancangan dan Implementasi Kontroler Linear Quadratic Regulator (LQR) pada Pengaturan Kecepatan Motor Induksi 3 Phasa”, Tugas Akhir Teknik Elektro, Institut Teknologi Sepuluh Nopember, Surabaya, 2014.

Mlynek D.M, Patyra M.J “Fuzzy logic implementation and applications” Wiley, Teubner, 1996.

Ogata, K. Modern Control Engineering 3rd ed. Prentice-Hall. USA. 1997.

Kempf, C. J., Kobayashi, S., “Disturbance Observer and Feedforward Design for a High Speed Direct Drive Positioning Table”, IEEE Transactions On Control Systems Tehnology, Vol. 7, no. 5, September 1999.

Kim, B. K., Chung, W. K., “Advanced Disturbance Observer Design for Mechanical Positioning System” IEEE Trans. On Industrial Electronics, vol 50, no 6, December 2015.

Ing. PavelJakoubek, Experimental Identification of Stabile Nonoscillatory Systems from Step-Responses by Selected Methods, KonferenceStudentskétvůrčíčinnosti, 2009.

Astrom,K,J., Witternmark Bjorn, Adaptive Control System, Second Edition, Addison-Wesley (ISBN 0-201-55866-1),1995.

Choi, Y., Yang, K., “ On The Robustness and Performance of Disturbance Observer for Second Order Systems “, IEEE Transactions On Automatic Control, Vol.48, no.2, February 2003.

Kim, B. K., Chung, W. K.., “ Advanced Disturbance Observer Design for Mechanical Positioning System “, IEE Trans. On Industrial Electronics, vol 50, no 6, December 2003.

Ohnishi, K., Shibata, M., Murakami, T., “ Motion Control of Advanced Mechatronic “, IEEE/ ASME Trans. Mechatronics, vol 1, no 1, March 1996

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