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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
Design of an RLC Compensator for a Synchronous Motor: Torque Ripple Improvement

Author: Bashar A. Fadheel
Journal: Al-Qadisiyah Journal for Engineering Sciences مجلة القادسية للعلوم الهندسية ISSN: 19984456 Year: 2019 Volume: 12 Issue: 1 Pages: 17-24
Publisher: Al-Qadisiyah University جامعة القادسية

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Abstract

AC-drive systems based Permanent Magnet Synchronous Motor (PMSM) are widely utilized in industrial applications due to many advantages including excellent efficiency, best reliability, and low-effective cost compared with DC-drive systems. Design and implementation of an RLC compensator for a PMSM-drive system is demonstrated in this paper. The main aims of using an RLC compensator are decreasing of Total-Harmonics-Distortion (THD) of the input line current and Ripple Factor (RF) of the electromagnetic torque over a wide range variation in rotor speed and load. The entire transfer function of the proposed system is derived for stability verification under the change of rotor speeds. The proposed PMSM-drive system is implemented with and without RLC compensator for two cases; which are at a fixed load and a step-change in load. Good performance is achieved using the proposed RLC compensator; in terms of THD and RF are 0.77% and 3.13%, respectively.

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