A Novel Method for Partial Demagnetization Fault Detection in PMSMs

Abstract

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.

Keywords

• Demagnetization,Fault detection,Gabor order tracking,Nonstationary

A Novel Method for Partial Demagnetization Fault Detection in PMSMs

Abstract

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.

Keywords

• Demagnetizasyon,Hata teşhisi,Gabor order tracking,Dinamik çalışma

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