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Article
Sensorless Speed Estimation of Permanent Magnet Synchronous Motor Using Extended Kalman Filter

Authors: Hala W. Khalid --- Dr.Farazdaq R. Yasien
Journal: IRAQI JOURNAL OF COMPUTERS,COMMUNICATION AND CONTROL & SYSTEMS ENGINEERING المجلة العراقية لهندسة الحاسبات والاتصالات والسيطرة والنظم ISSN: 18119212 Year: 2018 Volume: 18 Issue: 1 Pages: 64-81
Publisher: University of Technology الجامعة التكنولوجية

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Abstract

This paper presents a new approach in the modeling and the design of sensorless control method for the Permanent Magnet Synchronous Motor (PMSM) based on the use of the Extended Kalman Filter (EKF). The fourth order EKF is proposed to estimates the states: motor speed ω, rotor angular position, θ and the currents from the measured currents and voltages. The linearization of the nonlinear PMSM model is done in the α_β coordinate system to perform the operation of the EKF.The three phases Space Vector Pulse Width Modulation (SVPWM) inverter usually implemented as a part of the Field Oriented Control (FOC) strategy which has become a standard in the control of PMSM.


Article
Speed Controller of Three Phase Induction Motor Using Sliding Mode Controller
التحكم في سرعـة محـرك حثي ثـلاثي الاطـوار باستخدام المتحكم المسيطـر على سـرعـة الانزلاق

Authors: Farazdaq R. Yasien --- Wala’a H. Nasser
Journal: Journal of Engineering مجلة الهندسة ISSN: 17264073 25203339 Year: 2019 Volume: 25 Issue: 7 Pages: 118-133
Publisher: Baghdad University جامعة بغداد

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Abstract

In this paper, an adaptive integral Sliding Mode Control (SMC) is employed to control the speed of Three-Phase Induction Motor. The strategy used is the field oriented control as ac drive system. The SMC is used to estimate the frequency that required to generates three phase voltage of Space Vector Pulse Width Modulation (SVPWM) invertor . When the SMC is used with current controller, the quadratic component of stator current is estimated by the controller. Instead of using current controller, this paper proposed estimating the frequency of stator voltage since that the slip speed is function of the quadratic current . The simulation results of using the SMC showed that a good dynamic response can be obtained under load disturbances as compared with the classical PI controller, The complete mathematical model of the system is described and simulated in MATLAB/SIMULINK.

في هذا البحث ، تم اقتـراح نظام تحكم في الوضع المنزلق (SMC) مع سطح منزلق متكامل من أجل التحكم في سرعة محرك حثي ثلاثي الاطوار. يستخدم تصميم النظام نظرية التحكـم الموجه (FOC) للمحركات الحثية Induction Motor . في هذا البحث يقوم المسيطر المستعمل بتخمين التردد المطلوب لتوليد فولتية ثلاثية الاطوار لازمة لعمل العاكس (invertor) , يتم محاكاة وحدة التحكم في الوضع المنزلق في ظروف متنوعة ، وقد تم مقارنة النتائج مع مسيطر سرعة من نوع اخر وهو المسيطر PI التقليدي. أظهرت النتائج أن التحكم في الوضع المنزلق (SMC) يمكن أن يعطي أداءً قويًا وعاليًا في ظل تغيير الحمل الخارجي , بالمقارنة مع المسيطر التقليدي (PI controller)

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