Sadık ÖZDEMİR
(Pamukkale Üniversitesi, Denizli Teknik Bilimler Meslek Yüksekokulu, Elektrik-Enerji Bölümü, Denizli, Türkiye.)
Yıl: 2021Cilt: 27Sayı: 2ISSN: 2147-5881Sayfa Aralığı: 210 - 219Türkçe

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Asenkron motorun stator q-eksen gerilimini kullanan alan yönlendirmeli vektör kontrollü gerilim sensörü kullanmadan sensörsüz hız tahmini
Bu çalışmanın amacı, asenkron motorlar (ASM) için sensörsüz, dolaylı, alan yönlendirmeli vektör kontrollü bir hız tahmin yönteminin geliştirilmesidir. Önerilen yöntem, yeni bir Model referans adaptif sistemdir(MRAS) ve motorun hızını hesaplamak için sadece kararlı hal alan yönlendirme durumunda stator q-eksen gerilim denklemine ihtiyaç duyar. Hesaplanan gerilim doğrudan kontrol algoritması içerisinde üretilen q-ekseni referans gerilimi ile karşılaştırıldığından, bu yöntem bir referans modele ihtiyaç duymaz, ayrıca gerilim sensörü gereksinimini ortadan kaldırır. Bu basit denklemde herhangi bir rotor parametresi yoktur ve bu sistemin rotor parametrelerinin değişimine karşı bağışıklık kazandırır. Dahası, bu basitleştirilmiş hesaplama akı tahmini gerekliliğini ortadan kaldırdığı için yöntem saf entegrasyon sorunlarına karşı daha az duyarlıdır. Böylece önerilen MRAS çok düşük ve sıfır hızlarda oldukça doğru hız tahmini yapabilir. Ayrıca, önerilen MRAS yöntemi gerilim sensörü gereksinimini ortadan kaldırmaktadır. Bu sayede özellikle düşük hızlarda gerilim sensörünün ölçüm gürültülerinin sebep olabileceği tahmin hatalarının önüne geçilmiş ve sistemin düşük ve sıfır hız performansları iyileştirilmiş olmaktadır. Bu çalışmada simülasyon çalışmaları MATLAB / SIMULINK ortamında tamamlanmıştır.
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