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Article
Design Of Speed Controller For Three Phase Induction Motor Using Fuzzy Logic Approach

Authors: Walaa H. Nasser --- Farazdaq R.Yaseen
Journal: IRAQI JOURNAL OF COMPUTERS,COMMUNICATION AND CONTROL & SYSTEMS ENGINEERING المجلة العراقية لهندسة الحاسبات والاتصالات والسيطرة والنظم ISSN: 18119212 Year: 2018 Volume: 18 Issue: 3 Pages: 12-25
Publisher: University of Technology الجامعة التكنولوجية

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Abstract

The use of Induction Motor (IM) has been increased becuase of it’s robustconstruction , simple design , and low cost . This paper presents a methodology for theapplication and performance of Fuzzy like PI Controller to set the frequency of SpaceVector Pulse-Width modualtion (SVPWM) Inverter applied to closed loop speed control ofIM. When the controller is used with current controller, the quadratic component of statorcurrent is estimated by the controller. Instead of using current controller, this paperproposes estimating the frequency of stator voltage. The dyanamic modelling of the IM ispresented by dq axis theory. From the simulation results, the superiority of the suggestedcontroller can be observed in controlling the speed of the three-phase IM.


Article
Control Techniques of Torque Ripple Minimization for Induction Motor
تقنيات لتقليل تموج عزم الدوران للمحرك الحثي

Author: Thamir Hassan Atyia
Journal: Tikrit Journal of Engineering Sciences مجلة تكريت للعلوم الهندسية ISSN: 1813162X 23127589 Year: 2018 Volume: 25 Issue: 4 Pages: 57-63
Publisher: Tikrit University جامعة تكريت

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Abstract

A Matlab-Simulink environment used to build a model of an Induction Motor (IM) to study and explore methods for minimizing the torque ripple. Various control strategies were reviewed and simulation studies were carried out for the following control methods: Direct Torque control, Direct Torque control with harmonic elimination, and Direct Torque control with Matrix convertor were the obtained results analyzed, evaluated, and compared to each other. The simulation results confirmed that Using Direct Torque Control with Harmonic elimination method was significantly minimized the torque ripple as the harmonics of the output voltage were canceled; discussions and conclusions were presented in this study.

إن وجود بيئة ماتالب-SIMULINK تستخدم لبناء نموذج لمحرك حثي )IM )لدراسة واستكشاف طرق لتقليل تموج عزم الدوران. وتم استعراض استراتيجيات مختلفة وأجريت دراسات محاكاة لطرق التحكم التالية: التحكم المباشر في عزم الدوران: التحكم المباشر في عزم الدوران مع حاذف االشارة التوافقية، والتحكم المباشر في عزم الدوران مع حاذف االشارة التوافقية مع مصفوفة محول)(AC-AC وكانت النتائج المتحصل عليها تم تحليلها وتقييمها، ومقارنتها مع بعضها البعض. أكدت نتائج المحاكاة التي تم تحقيقهاعن تقليل التموج في عزم الدوران؛ وتم عرض المناقشات واالستنتاجات واالقتراحات في هذه الدراسة.


Article
SPEED CONTROL OF DTC-SVM FOR INDUCTION MOTOR DRIVE USING SELF-TUNING FUZZY PI CONTROLLER ANN ANFIS

Authors: Rawaa kadhim sakran --- Khearia Mohammed Ali
Journal: Al-Qadisiyah Journal for Engineering Sciences مجلة القادسية للعلوم الهندسية ISSN: 19984456 Year: 2018 Volume: 11 Issue: 3 Pages: 293-308
Publisher: Al-Qadisiyah University جامعة القادسية

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Abstract

This paper deals with the performance analysis of three phase Induction Motor (IM) with Direct Torque Control based Space Vector Modulation (DTC-SVM). The DTC-SVM scheme is a kind of high-performance control of IM drives to improve the ripples of torque and flux in steady state, which one drawback of conventional DTC. DTC-SVM has three Proportional-Integral (PI) controllers, one used as the PI speed controller and other PI flux controller and PI torque controller, which are utilized to produce the stator voltage references (


Article
Simulation and Study of Multilevel Inverter System Fed by Photovoltaic Source

Author: Ali Abdulrazzak Jasim
Journal: Journal of University of Babylon مجلة جامعة بابل ISSN: 19920652 23128135 Year: 2018 Volume: 26 Issue: 2 Pages: 302-310
Publisher: Babylon University جامعة بابل

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Abstract

This paper proposes a simulation of Photovoltaic energy used to supply an induction motor with a comparison of two types of inverters. In general, the greater number of motors which"are used in commercial and industrial applications are"induction motors. To use PV source to run the induction motor, an interface circuits are used which are a dc-dc"converter and an inverter, the PV cell has nonlinear behavior,"a dc-dc converter is used along with Maximum Power Point Tracker controller to improve the efficiency by boosting the output voltage of the PV module and to match the load demand."The dc output voltage of PV module then"converted to AC, two types of inverter are presented, A conventional Voltage Source Inverter system and multilevel inverter system which employ selective harmonic elimination method fed three phase induction motor, these two types of inverters are simulated using Matlab/Simulink and their results are presented. The FFT spectrum is presented of the output currents to analyze the harmonics reduction, which shows that the"multilevel inverter is better than VSI system"according to harmonics reduction and increment in output voltage and power.

هذه الورقة تقترح محاكاة استخدام الطاقة الشمسية لتغذية محرك حثي وتقارن عمل نوعين من العاكسات. بصورة عامة, اغلب المحركات المستعملة في المجالات الصناعية والتجارية هي محركات حثية. لتشغيل هكذا نوع من المحركات بأستخدام الطاقة الشمسية, يجب توفر محول dc-dc و عاكس. وبما ان الحلايا الشمسية تمتلك سلوك لاخطي, لذلك يجب توفر محول dc-dc مع متحكم (MPPT) لتحسين كفائة الطاقة الشمسية وعمل توافق مع متطلبات الحمل. لتحويل الفولتية الخارجة المستمرة من مصدر الطاقة الشمسية الى متناوبة تم استعمال نوعان من العاكسات. عاكس فولتية المصدر التقليدي و عاكس متعدد المستويات وتم اخذ النتائج بالنسبة لكلا النوعين والمقارنة بينهما.

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