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Article
Evaluation of Vector-Controlled Asynchronous Machines

Authors: Ammar S. Muhammed2 --- Nihad M. Ameen
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: 20-26
Publisher: University of Technology الجامعة التكنولوجية

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Abstract

In this paper vector control with variable frequency drive used toapply speed control of a three-phase AC Asynchronous and induction machines.The flux and torque references used to obtain the current components.Proportional-Integral controllers are used to keeping the measured currentcomponents at their reference values. The stator voltage references are theoutput of the PI current controllers. High-performance with the smoothoperation is obtained using the proposed method. The differences can be seen inbehavior dynamic state. When the motor is rotating at full speed with a fullload,it reaches good current waveforms very easily due to the independent PIcontrol of torque and magnitude of flux. In high and sudden variations of thereference input, the direct command is more efficient and less demanding forthe equipment. The expressions of the fundamental variables (speed, torque,flux) and equivalent phase circuit of the machine will be reviewed.


Article
Sensorless Vector Control of Three Phase Induction Motor Based on Full Neural Estimator and Controller

Author: Fatma H. Faris
Journal: Engineering and Technology Journal مجلة الهندسة والتكنولوجيا ISSN: 16816900 24120758 Year: 2011 Volume: 29 Issue: 9 Pages: 1737-1750
Publisher: University of Technology الجامعة التكنولوجية

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Abstract

Conventional vector control of A.C drives are widely used in industry andmany other applications, where high dynamic performance is required, this type ofcontroller usually needs costly speed sensor. Sensorless vector control is stronglyrecommended in the dangerous sites and hostile environment, also to reduce costand increase reliability. In this way the rotor speed can be estimated from theterminal voltage and current by means of DSP microprocessor. The DSP-estimatoris very complex hardware, has many operation problems, and very sensitive to theelectromagnetic interference (EMI). This paper proposes using the ArtificialNeural Network (ANN) to estimate the rotor speed, flux vector, torque, and unitvectors instead of DSP-estimator. Also, the neural-based controller is proposedtoo. The ordinary vector control with speed sensor and sensorless vector controlbased on DSP-estimator PI-controller are represented in this work as point ofcomparison. Also, the mathematical representation and simulation of the threephase induction motor is illustrated in this paper. The proposed method, neuralbasedsensorless vector controller and estimator, gives superior performance indifferent speed with respect to DSP-estimator PI-controller.


Article
OPEN LOOP &CLOSED LOOP VECTOR CONTROL of VFD THREE PHASE VERSION INDUCTION MOTOR DRIVES
السيطرة ألاتجاهية (المسار المفتوح والمسار المغلق) لسواقات المحرك الحثي ثلاثي الاطوار

Authors: Ahmed Ibrahim Jaber احمد ابراهيم جابر --- Husham Idan Hussein هشام عيدان
Journal: DIYALA JOURNAL OF ENGINEERING SCIENCES مجلة ديالى للعلوم الهندسية ISSN: 19998716/26166909 Year: 2017 Volume: 10 Issue: 2 Pages: 27-38
Publisher: Diyala University جامعة ديالى

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Abstract

In this paper, a design of a vector control algorithm for a three-phase induction motor. The three phase AC induction motors are a popular in manufacturing industries as it has many benefits. It is quite simple and minimum cost is favourable, it does not have brushes and requires minimum maintenance. In order to achieve variable speed operations in a three-phase AC induction motor by open and closed loop vector control technique to improve the motor’s performance, is used because this technique has higher efficiency, accurate control of the motor’s speed and torque. To analyse vector control, by converting the three phase Quantities into 2-axes system called the d- q transformation. The d-q axes can be chosen to be stationary or rotating. MATLAB/ SIMULINK is used as tool to simulate the model of (IM) and applying the control technique on it. In open and closed loop vector control, by use of PWM inverter, voltage supply can vary as well as the supply frequency such that the ratio v/f remains constant so that the flux remains constant as well.

في هذاالبحث تصميم خوارزمية لنظام سيطرة على محرك حثي ثلاثي الاطوار. المحركات الحثية ثلاثية الاطوار تعتبر من الانواع المعروفة و المفضلة في العديد من الصناعات , لكونها ذات كلف اقتصادية مناسبة جدا من حيث الصيانة وايضا لعدم احتوائها على الفرش الكاربونية (التي تستهلك وتحتاج للتبديل بشكل متكرر).الهدف من هذا البحث هو تحسين اداءالمحرك الحثي ثلاثي الاطوار من حيث السيطرة على السرعة (العمل بسرع مختلفة) والعزم,عن طريق تصميم خوارزمية لنظام سيطرة اتجاهية (مسار مغلق ومسار مفتوح) .من اجل اجراء التحليل الرياضي لنظام السيطرة الاتجاهية تم تحويل الاطوار الثلاثة الى محورين يدعى تحويل (D-Q) في هذا التحويل يمكننا تطبيقه على المحورين الدوار والمتحرك حسب طريقة العمل المراد العمل عليها. MATLAB/ SIMULINK استخدم كاداة لمحاكاة التصميم المقترح للمحرك الحثي وقد تم تطبيق نظريات السيطرة عليه مع PWM INVERTER . النتائج اثبتت كفاءة طرق السيطرة المستخدمة على المحرك الحثي ثلاثي الاطوار من حيث ان نسبة الفولتية الى التيار بقيت ثابتة.


Article
OPTIMAL CONTROLLER FOR VECTOR-CONTROLLED MULTILEVEL INVERETER FED BRUSHLESS DC MOTOR
مسيطر مثالي لمحرك التيار المستمر عديم الفرش المسيطر اتجاهيأ و المغذى بمبدل متعدد المستويات

Authors: Turki Kahyoosh Hassan --- Mustafa Bashar Abdulmelik
Journal: Journal of Engineering and Sustainable Development مجلة الهندسة والتنمية المستدامة ISSN: 25200917 Year: 2018 Volume: 22 Issue: 1 Pages: 34-46
Publisher: Al-Mustansyriah University الجامعة المستنصرية

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Abstract

This paper presents a high performance brushless DC (BLDC) motor drive system that achieves optimal speed response with minimized torque ripple and low total harmonic distortion (THD). The speed controller is optimally tuned using particle swarm optimization (PSO) technique; and the torque ripple is minimized by using vector control instead of the six-step (trapezoidal control) and by using multilevel inverter to lower the THD of the voltages and currents. The proposed system alongside the traditional six-step technique, are modeled and simulated in MATLAB/Simulink program; and their simulation results are compared and discussed. The obtained results show that the proposed system speed response and torque ripple are greatly improved compared with the six-step technique.


Article
A Fuzzy Logic Controller Based Vector Control of IPMSM Drives
محاكاة السيطرة باستخدام المنطق المضبب للمحركات التزامنية ذو المغناطيس الدائمي

Author: Afaneen Anwer Abbood أفانين أنور عبود
Journal: Journal of Engineering مجلة الهندسة ISSN: 17264073 25203339 Year: 2013 Volume: 19 Issue: 10 Pages: 1287-1299
Publisher: Baghdad University جامعة بغداد

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Abstract

This paper explores a fuzzy-logic based speed controller of an interior permanent magnet synchronous motor (IPMSM) drive based on vector control. PI controllers were mostly used in a speed control loop based field oriented control of an IPMSM. The fundamentals of fuzzy logic algorithms as related to drive control applications are illustrated. A complete comparison between two tuning algorithms of the classical PI controller and the fuzzy PI controller is explained. A simplified fuzzy logic controller (FLC) for the IPMSM drive has been found to maintain high performance standards with a much simpler and less computation implementation. The Matlab simulink results have been given for different mechanical operating conditions. The simulated results confirmed that the FLC-PI has a lower ripple than the conventional PI controller.

عرض هذا البحث وحدة تحكم السرعة في المكائن المتزامنة ذو مغناطيس الدائمي (PMSM) وفق سيطرة المتجه . ان وحدات تحكم السيطرة تستخدم PI التقليدي للسيطرة على سرعة المكائن المتزامنة ذو المغناطيس الدائمي. ان اساسيات خوازميات المنطق المضبب قد تم تقديمها في هذا العمل لتحسين الاداء والحصول على تحكم بسرعة الماكنة بشكل افضل. حيث تم مقارنة كاملة بين المتحكم باستخدام PI الكلاسيكية مع المتحكم باستخدام قوانين المنطق المضبب. وكانت النتائج تبين ان المتحكم باستخدام المنطق المضبب ذو اداء عالي ناهيك عن بساطة تنفيذ الخوازميات. هذا وقد أعطيت Matlab/SIMULINK نتائج جيدة لمحاكاة FLC-PI بعد ان تم تشغيل الموديل لظروف تشغيل ميكانيكية مختلفة .

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