DESIGN OF PASSIVE HARMONIC FILTER FOR THE CLAW-POLE SYNCHRONOUS GENERATORS UNDER NON-LINEAR LOADING

Abstract

In this study, firstly, the harmonic distortions of terminal voltage and current of a three-phase 1,5 kVA, 150V, 50 Hz, and four poles permanent magnet excited Claw Pole Synchronous Generator (CPSG) supplying a 6-pulse rectifier load are simulated using its 3D Finite Element Model (FEM) in Ansys Maxwell software environment. Then, various low-pass passive filters are designed with a practical approach to reduce the terminal voltage and winding current harmonics in the analysis system. Finally, the terminal voltage and current harmonic distortions, losses, torque oscillations, and efficiency of the modelled CPSG are evaluated when the designed filter is connected to the system. According to the numerical results obtained, the best-performing filter among the designed ones is determined. It is also concluded that with the help of this best-performing filter, the terminal voltage harmonic distortion, losses, torque oscillations, and efficiency of the CPSG are considerably improved.

Keywords

• Claw pole synchronous generator
• low-pass passive filter
• nonlinear load
• filter design

PENÇE-KUTUPLU SENKRON GENERATÖRLER İÇİN DOĞRUSAL OLMAYAN YÜKLEME ALTINDA PASİF HARMONİK FİLTRE TASARIMI

Abstract

Bu çalışmada, ilk olarak, 1,5 kVA, 150V, 50 Hz, dört kutuplu, kalıcı mıknatıs ile uyarılmış Pençe Kutuplu Senkron Generatörün (PKSG), 6 darbeli doğrultucu yükü beslerken terminal gerilimi ve akımındaki harmonik bozulmalarının 3 Boyutlu Sonlu Elemanlar Modeli (SEM) kullanılarak Ansys Maxwell yazılım ortamında simülasyonu gerçekleştirilmiştir. Daha sonra, analiz sistemindeki terminal gerilimi ve sargı akımı harmoniklerini azaltmak için pratik bir yaklaşımla çeşitli alçak geçiren pasif filtreler tasarlanmıştır. Son olarak, tasarlanan filtrelerin sisteme bağlanması durumunda, modellenen PKSG'nin terminal gerilimi ve akım harmonik bozulmaları, kayıpları, tork dalgalanması ve verimi değerlendirilmiştir. Elde edilen sayısal sonuçlardan, tasarlanan filtreler arasında en iyi performansa sahip olan belirlenmiştir. Ayrıca, bu en iyi performansa sahip filtre yardımıyla PKSG'nin terminal gerilim harmonik bozulması, kayıpları, tork dalgalanması ve veriminin dikkate değer ölçüde iyileştirildiği sonucuna varılmıştır.

Keywords

• pençe kutuplu senkron generatör
• Alçak geçiren pasif filtre
• doğrusal olmayan yük
• filtre tasarımı

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