2019
Volume 19, Number 3/4, pp. 74-79
Diagnosis of dynamic eccentricity in inverter-fed permanent magnet synchronous motors based on zero sequence voltage components
Jawad Faiz, Mohamad Sadegh Bozorgian and Ehsan Mazaheri-Tehrani
School of Electrical and Computer Engineering, College of Engineering, University of Tehran, Tehran 1439952131, Iran
The reliability of permanent magnet machines is a topic of increasing importance because of their broad range of applications, such as in biomedical implants, but they require cost-effective fault diagnosis methods. In this paper, the finite element method is employed to simulate perfect and faulty inverter-fed permanent magnet synchronous motors (PMSMs) to develop and propose an online and noninvasive method for the diagnosis of dynamic eccentricity in PMSMs based on zero sequence voltage components (ZSVCs). The strategy is to determine the load-independent frequency patterns due to the dynamic eccentricity fault in the ZSVC signal of PMSMs. Some indicators are suggested for fault detection.