Abstract




 
   

IJE TRANSACTIONS A: Basics Vol. 27, No. 1 (January 2014) 69-78   

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  EXACT MODELING AND SIMULATION OF SATURATED INDUCTION MOTORS WITH BROKEN ROTOR BARS FAULT USING WINDING FUNCTION APPROACH
 
M. Ojaghi, M. Sabouri, J. Faiz and V. Ghorbanian
 
( Received: August 17, 2013 – Accepted: August 22, 2013 )
 
 

Abstract    Winding function method (WFM) provides a detailed and rather simple analytical modeling and simulation technique for analyzing performance of faulty squirrel-cage induction motors (SCIMs). Such analysis is mainly applicable for designing on-line fault diagnosis techniques. In this paper, WFM is extended to include variable degree of magnetic saturation by applying an appropriate air gap function and novel techniques for estimating required saturation factor and angular position of the air gap flux density. The resultant saturable winding function method (SWFM) is properly applied for analyzing SCIMs with broken rotor bars and for identifying the saturation effect on the related fault indexes. Comparing simulation results to the corresponding experimental results show higher accuracy of the SWFM. This means that more precise fault diagnosis techniques can be designed by using the proposed saturable modeling technique.

 

Keywords    Induction motors, Broken bar fault, Magnetic saturation, Modeling, Computer simulation.

 

چکیده    روش تابع سیم پیچ یک تکنیک شبیه سازی و مدلسازی دقیق و نسبتاً ساده برای آنالیز عملکرد موتورهای القایی قفس سنجابی معیوب ارائه می کند. این روش برای شناسایی لحظه ای خطا قابل اعمال است. در این مقاله، روش تابع سیم پیچ با اعمال درجات متغیر اشباع مغناطیسی با بکار بردن یک تابع فاصله هوایی مناسب و نیز روشی جدید برای تخمین ضریب اشباع مورد نیاز و موقعیت زاویه ای چگالی شار فاصله هوایی بسط داده شده است. در نتیجه مدل تابع سیم پیچ اشباع پذیر برای آنالیز موتور القایی قفس سنجابی دارای عیب میله های شکسته شده روتور و همچنین برای شناسایی اثر اشباع روی شاخص های عیب مربوطه بکار رفته است. مقایسه نتایج شبیه سازی با نتایج آزمایشی متناظر نشان می دهد که مدل تابع سیم پیچ اشباع پذیر دارای دقت بالایی می باشد. این بدان معنی است که روشهای تشخیص عیب دقیقتری با استفاده از این مدل اشباع پذیر می تواند طراحی گردد.

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