Comparison of FOC and DTC for speed sensorless PMSM using

Abstract

In this study, direct torque control (DTC) and field oriented control (FOC) simulation study of a speed sensorless permanent magnet synchronous motor (PMSM) is carried out. The speed signal required for the control methods was obtained with a sliding mode observer (SMO). As a result of the study, current, speed (measured and estimated) and torque signals of PMSM were obtained. Total harmonic distortion (THD) and discrete wavelet transform (DWT) analysis of the obtained signals were performed to evaluate the performance of DTC and FOC. In addition, DTC and FOC comparisons were made using the root mean square error (RMSE) criterion for the measured and estimated speed signals. In this study, it was determined that the DTC and FOC methods are superior and deficient compared to each other.

Keywords

• PMSM
• DTC
• FOC
• SMO
• THD
• DWT
• RMSE

KKG kullanılan hız algılayıcısız SMSM için AYK ve DMK'nin karşılaştırılması

Öz

Bu çalışmada hız sensörsüz sabit mıknatıslı senkron motorun (SMSM) doğrudan moment kontrolü (DMK) ve alan yönlendirmeli kontrol (AYK) benzetim çalışması gerçekleştirilmiştir. Kontrol yöntemleri için gerekli olan hız sinyali kayan kipli gözlemci (KKG) ile elde edilmiştir. Çalışma sonucunda SMSM’nin akım, hız (ölçülen ve tahmin edilen) ve moment sinyalleri elde edilmiştir. DMK ve AYK performansının değerlendirilebilmesi için elde edilen sinyallerin toplam harmonik bozunum (THB) ve ayrık dalgacık dönüşümü (ADD) analizi gerçekleştirilmiştir. Ayrıca ölçülen ve tahmin edilen hız sinyalleri için hata karelerinin ortalamasının karekökü (HKOK) kriteri kullanılarak DMK ve AYK karşılaştırması yapılmıştır. Bu çalışma ile DMK ve AYK yöntemlerinin birbirlerine göre üstün ve eksik oldukları durumlar belirlenmiştir.

Anahtar Kelimeler

• SMSM
• DMK
• AYK
• KKG
• THB
• ADD
• HKOK

Kaynakça

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