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Article
Speed Controller of Three Phase Induction Motor Using Sliding Mode Controller

Authors: Walaa H. Nasser --- Dr.Farazdaq R.Yaseen
Journal: IRAQI JOURNAL OF COMPUTERS,COMMUNICATION AND CONTROL & SYSTEMS ENGINEERING المجلة العراقية لهندسة الحاسبات والاتصالات والسيطرة والنظم ISSN: 18119212 Year: 2019 Volume: 19 Issue: 1 Pages: 52-62
Publisher: University of Technology الجامعة التكنولوجية

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Abstract

A Sliding Mode Control (SMC) with integral surface is employed to controlthe speed of Three-Phase Induction Motor in this paper. The strategy used is a modifiedfield oriented control to control the IM drive system. The SMC is used to calculate thefrequency required for generating three phase voltage of Space vVector Pulse WidthModulation (SVPWM) invertor. When the SMC is used with current controller, thequadratic component of stator current is estimated by the controller. Instead of usingcurrent controller, this paper proposed estimating the frequency of stator voltagewhereas the slip speed is representing a function of the quadratic current. The simulationresults of using the SMC showed that a good dynamic response can be obtained underload disturbances as compared with the classical PI controller; the completemathematical model of the system is described and simulated in MATLAB/SIMULINK.


Article
Matlab/Simulink Modeling of Four-leg Voltage Source Inverter With Fundamental Inverter output Voltages Vector Observation

Authors: Riyadh G. Omar --- Dr.Rabee' H. Thejel
Journal: Iraqi Journal for Electrical And Electronic Engineering المجلة العراقية للهندسة الكهربائية والالكترونية ISSN: 18145892 Year: 2014 Volume: 10 Issue: 2 Pages: 107-117
Publisher: Basrah University جامعة البصرة

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Abstract

Four-leg voltage source inverter is an evolution of the three-leg inverter, and was ought about by the need to handle the non-linear and unbalanced loads. In this work Matlab/ Simulink model is presented using space vector modulation technique. Simulation results for worst conditions of unbalanced linear and non-linear loads are obtained. Observation for the continuity of the fundamental inverter output voltages vector in stationary coordinate is detected for better performance. Matlab programs are executed in block functions to perform switching vector selection and space vector switching.


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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