A Novel Method for Partial Demagnetization Fault Detection in PMSMs

Yıl 2017, Cilt: 6 Sayı: 2, 20 - 27, 31.08.2017

Mustafa Eker , Mehmet Akar , Cem Emeksiz , Zafer Doğan

Öz

It is
generally very important to detect partial demagnetization faults at the
beginning stage for Permanent Magnet Synchronous Motors (PMSMs) which are
generally operated under nonstationary conditions in industrial applications.
In this study, a new method based on Gabor Order Tracking (GOT) has been
presented which tracks the orders that are characteristic of the fault in motor
current at nonstationary operating speeds for the detection of partial
demagnetization fault. The amplitude changes of the envelope signal obtained
from the order components were used as fault indicators. The results obtained
from the experimental study indicate that the suggested method successfully
detects the partial demagnetization fault under different speed and load
conditions. The main innovative parts of this study are that GOT method was
implemented on the motor current signal for the first time.

Anahtar Kelimeler

Demagnetization, Fault detection, Gabor order tracking, Nonstationary

A Novel Method for Partial Demagnetization Fault Detection in PMSMs

Öz

Endüstriyel uygulamalarda genellikle durağan
olmayan çalışma şartlarında çalıştırılan Sabit Mıknatıslı Senkron Motorlar
(SMSM) için kısmi demagnetizasyon arızasının başlangıç aşamasında tespiti
oldukça önemlidir. Sunulan çalışmada kısmi demagnetizasyon arızasının tespiti
için durağan olmayan çalışma hızlarında motor akımında arızaya ait
karakteristik mertebeleri Gabor Order Tracking (GOT) tabanlı izleyen yeni bir
yöntem sunulmuştur. Arızaya ait karakteristik mertebe bileşenlerinden elde
edilen zarf sinyalinin genlik değişimleri arıza göstergesi olarak
kullanılmıştır. Deneysel çalışmada elde edilen sonuçlar önerilen yöntemin kısmi
demagnetizasyon arızasını değişik hız ve yük şartlarında başarılı şekilde
tespit ettiğini göstermektedir. Bu çalışmanın temel yenilikçi kısmı, motor akım
sinyaline ilk defa GOT metodunun uygulanmasıdır.

Anahtar Kelimeler

Demagnetizasyon, Hata teşhisi, Gabor order tracking, Dinamik çalışma

Kaynakça

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