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Register a new userالمرشحات الفعالة للمعالجة الآلية واللحظية لتوافقيات الشبكة ثلاثية الطور
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Aِl-Baath University رسالة ماجستير
Publication date
2019
and research's language is
العربية
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المرشحات الفعالة للمعالجة الآلية واللحظية لتوافقيات الشبكة ثلاثية الطور : هذا العمل يقترح طريقة عملية وفعالة لتخفيض التوافقيات في الشبكة الكهربائية
No English abstract
References used
يوسف كاميليا 2005 - التوافقيات في الشبكة الكهربائية الطبعة ( الرابعة ) مطبعة العدل حلب
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Induction motors are the most widely used electrical motors due to their reliability,
low cost and robustness. However, induction motors do not inherently have the capability
of variable speed operation. Due to this reason, earlier dc motors were a
pplied in most of
the electrical drives. But the recent developments in speed control methods of the induction
motor have led to their large scale use in almost all electrical drives.
Out of the several methods of speed control of an induction such as pole changing,
frequency variation, variable rotor resistance, variable stator voltage, constant V/f control,
slip recovery method etc, the closed loop constant V/f speed control method is most widely
used. In this method, the V/f ratio is kept constant which in turn maintains the magnetizing
flux constant so that the maximum torque remains unchanged. Thus, the motor is
completely utilized in this method.
This paper presents a three phase shunt Active Power Filter (APF) for power quality
improvements in terms of harmonics compensation. The compensation process is based on
measure non-liner load currents and Active Filter currents, and then extract t
he references
from measured currents. Measured currents are then transferred from abc frame to d-q
reference frame. A Synchronous Proportional Integral controller (Synchronous PI
controller) is used. The control signals then drive the Pulse Width Modulation (PWM)
routine, where its output controls the Voltage Source Inverter (VSI) switching devices. The
performance of the Active Filter and the Synchronous PI controller is validated though the
simulink results in MATLAB environment.
The study of electromagnetism in electrical machines is critical, especially in the field of
design, investment and optimal performance. To achieve this, there are many ways in which
varying degrees of accuracy . The main aim of this piece of resea
rch is to study electromagnetic
fields distribution in 3ph-induction machines using computational numerical methods and proper
software, because these fields form the basic principle in machine 's work. It has been used the
finite element method aided computer to solve magnetic equations (Maxwell equations).
The simulation of magnetic field in induction machine performed by ANSYS-software. The
paper shows technique for finding the electromagnetic fields distribution in all parts inside 3phinduction
machine to get optimal design.
Developing 3D Online Game and Interactive Virtual Environment Control System with unity game engine
this project is for graduation project in damascus university
يتضمن هذا البحث دراسة تجريبية لتصنيع مرشحات ترددات مكانية وفق الطرائق و التقانات التي
كان قد اقترحها العالم فاندر لوك. لقد قمت ببناء جملة انعراج ضوئية مستخدما تقانة هولوغرافيا فورييه لتطبيق تلك الطرائق، أولا للتعرف على الأشكال مثل الأحرف الأبجدية، ب
غية إحكام فعالية الجملة الضوئية و اختبارها، ثم قمت بتطبيق هذه التقانة لاصطفاء القطع المستقيمة وفق الاتجاه في مخطط لجملة من المستقيمات المختارة ثم في مخطط حقيقي للشقوق الجيولوجية. استخدمت في ذلك مبادئ و مفاهيم انعراج الضوء في نظرية تشكل الصور. و تضمن البحث شرحًا مفصلا للتجارب المنفذة لتسجيل صدور الأمواج المستخدمة في عمليات الترشيح وفق الشروط التصنيعية المطلوب تحقيقها للحصول على المواصفات الفنية البصرية المطلوبة و المحددة بالدراسة النظرية.
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