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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
Estimation of Stator Winding Temperature of a Three-Phase Induction Motor

Authors: Amer Mejbel Ali --- Afrah Thamer Abdullah
Journal: IRAQI JOURNAL OF COMPUTERS,COMMUNICATION AND CONTROL & SYSTEMS ENGINEERING المجلة العراقية لهندسة الحاسبات والاتصالات والسيطرة والنظم ISSN: 18119212 Year: 2019 Volume: 19 Issue: 2 Pages: 9-17
Publisher: University of Technology الجامعة التكنولوجية

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Abstract

This paper adopted a thermal network method (TNM) based on Motor-CADwith MATLAB/Simulink software, and finite element method (FEM) based on Motor-CAD with Flux2D software, to estimate the stator winding temperature of a totallyenclosed fan-cooled (TEFC), squirrel cage, three-phase induction motor. The threesoftware packages were adopted successfully with a good agreement among their resultsresulting in preferring using Motor-CAD in obtaining results, and using Flux2D withMATLAB to validate these results. The success of triple-software methodology will givethe induction motor designer a well-validated tool in attaining a safe motor operationwithout exceeding the maximum allowable stator winding temperature rise, and withoutusing an experimental test based on an expensive manufacturing motor.


Article
A Comparative Study of PI and IP Controllers For Field Oriented Control of Three Phase Induction Motor

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Abstract

In this paper, Field Oriented Control (FOC) of 3-phase induction motor iscontrolled by using (PI) and (I-P). These controllers are established with the help ofMATLAB/SIMULINK. The gains value obtained by the trial and error method of PIcontrollerand Particle Swarm Optimization (PSO) technique is used in this paper fordesigning I-P controllers that give better performance. PSO technique was proposed totune the optimal gains of I-P controller and state feedback gains. A comparison betweentwo controllers is presented. From simulation results, the advantages and disadvantagesof both controllers are investigated to explain the characteristic of the two methods. Theoperation perforamcnes of the two proposed controller systems have been examined interms of the motor torque, current ripples and momentary responses to load toquevariants.


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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