تحليل مراقب الفيض المغناطيسي لنظم التحكم بالمحرك التحريضي بدون حساسات باستخدام النماذج المبسطة للمحرك.
Abstract
إن تنفيذ التحكم بدون حساسات بالمحركات التحريضية يتطلب أن يكون الفيض المتشابك في المحرك معلوماً، وبما أن قياس الفيض المتشابك صعب ومكلف، فيمكن تقديره عبر قياس جهد التغذية والتيار المسحوب والسرعة الزاوية بدلاً من عملية القياس المباشر.
بعد المناقشة العامة للنموذج الكامل للمحرك التحريضي بالإضافة للنماذج المبسطة, تم إعطاء مدخل لتقدير الفيض المغناطيسي, مع افتراض تيار الدوار معدوم.
إن نماذج مراقبة الفيض المتشابك في هذا البحث هي في الأساس نماذج مراقبة فيض الثابت, باعتبار أن تقدير فيض الثابت عملياً هو الأكثر استخداماً. لقد افترضنا في البحث أن تيار الدوار معدوم أي أن المحرك يعمل بدون حمل. بعدئذ تمت دراسة وحساب الفيض المقدر لنماذج مراقبة الفيض المتشابك بواسطة نماذج Matlab/simulink.
In order to realize induction motor sensorless control the flux linkage of the motor must be known. It is, however, expensive and difficult to measure the flux. Instead, the flux can be estimated based on measurements of voltage, current and angular velocity. After a general discussion on the induction motor complete model as well as simplified models, an introduction to flux estimation is given, with the assumption that rotor current is zero.
The estimators discussed in this paper are mainly stator flux estimators, since stator flux control is mostly used. Throughout this paper, it is assumed that the rotor current is zero, meaning that the induction motors is running at no load. After that, the investigation of induction motor estimated stator flux was performed by Matlab/simulink models.
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