Kalıcı Mıknatıslı Vernier Makinaların Parametrik Analizi

Year 2024, Volume: 27 Issue: 3, 1169 - 1188, 25.07.2024

Tayfun Gündoğdu

https://doi.org/10.2339/politeknik.1183354

Abstract

Bu çalışmada; dış rotorlu ve yüzeye monte mıknatıslara sahip bir Vernier makinanın tüm geometrik parametrelerinin performans karakteristiklerine olan etkisi detaylı bir şekilde incelenmiştir. Bu çalışmanın amacı, düşük hız yüksek moment uygulamalarında kullanılan Kalıcı Mıknatıslı Vernier makinalar (KMVM) için mıknatıs, diş ve diş açıklığı kalınlık ve genişlikleri, hava aralığı genişliği, rotor dış çaplarının iç çapına oranı (bölünme oranı), şaft çapı gibi temel tasarım parametrelerinin moment, moment dalgalılığı, verim ve zıt EMK’ya olan etkisi inceleyerek genel bir tasarım kılavuzu geliştirmektir. KMVM’ların tasarım ve çalışma prensibi kısaca anlatılmış ve düşük moment dalgalılığına karşın yüksek moment veren oluk/kutup kombinasyonun nasıl seçilmesi gerektiği üzerinde durulmuştur. Akabinde, tasarım parametreleri tanıtılmış ve makinanın küçük güçlü rüzgâr türbini uygulamalarında kullanılacağı düşünülerek, her geometrik parametrenin moment ve verimin yanı sıra, terminal gerilimi hakkında detaylı bilgi veren zıt EMK dalga biçimi de parametrik olarak analiz edilmiştir. Moment, verim ve endüklenen gerilimi en çok etkileyen geometrik tasarım parametreleri belirlenmiş ve parametrik olarak en iyi tasarım elde edilmiştir. Analizler zaman adımlı, doğrusal olmayan, iki boyutlu sonlu elemanlar yöntemi (SEY) tabanlı bir program ile gerçekleştirilmiştir.

Keywords

Kalıcı Mıknatıslı Vernier, geometrik tasarım parametreleri, parametrik analiz, moment, verim

Parametric Analysis of Permanent Magnet Vernier Machines

Abstract

In this study, the effect of key geometrical parameters on the performance of a Vernier machine with outer rotor and surface mounted magnets has been studied in detail. The aim of this study is to develop a general design guideline by examining the influence of basic design parameters such as magnet, tooth and tooth tip dimensions, air gap width, ratio of rotor outer diameter to inner diameter (split ratio), shaft diameter, etc. on the torque, torque ripple, efficiency and induced voltage for permanent magnet Vernier machines (PMVMs) used in low speed and high torque applications, such as wind turbine. The design and working principle of the PMVMs is briefly explained and it is emphasized how to choose the slot/pole combination that provides high torque despite low torque ripple. Afterwards, the design parameters are introduced and the waveform of back-EMF, which gives detailed information about the terminal voltage of each geometric parameter as well as the torque and efficiency, is parametrically analyzed. The most dominant geometric design parameters affecting the torque, efficiency and back-EMF were determined and the best design was obtained parametrically. Analyses were performed with a time-stepped, non-linear, two-dimensional finite element method (FEM) based program.

Keywords

Permanent magnet Vernier, geometric design parameters, parametric analysis, torque, efficiency

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