Online Detecting Magnet Defect Fault in PMSG with Magnetic Sensing

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

3 Scopus Citations
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Author(s)

  • Qi Xu
  • Xuyang Liu
  • Wenchao Miao
  • Philip W. T. Pong
  • Chunhua Liu

Related Research Unit(s)

Detail(s)

Original languageEnglish
Pages (from-to)2775-2786
Journal / PublicationIEEE Transactions on Transportation Electrification
Volume7
Issue number4
Online published15 Apr 2021
Publication statusPublished - Dec 2021

Abstract

Recently, detecting the magnet defect fault in permanent magnet synchronous generators (PMSGs) is still challenging. The previous work mainly focuses on the phase current, back electromotive force, or searching coils. However, these methods are sometimes limited due to the machine configuration, being computationally complex, or even being intrusive to the system. This paper presents a new method for the online detection of the magnet defect in a PMSG simultaneously. This method is based on the leakage flux outside the generator, which is non-invasive. In the practical application, the leakage flux is measured by magnetic sensors mounted outside a PMSG under various operating conditions. First, the external leakage flux is derived theoretically with the magnetic equivalent circuit when one defective rotor magnet exists in a PMSG. Then, the external leakage flux is proved to contain information about the health condition of inside magnets during the machine operation. Subsequently, the permanent magnet defect indicator Find is proposed for analyzing the condition of the rotor magnets in detail. Finally, both simulation and experiment results verify the efficacy of the proposed method.

Research Area(s)

  • Circuit faults, fault detection, leakage flux, magnet defect, Magnetic circuits, Magnetic flux, magnetic sensing, Magnetic tunneling, Magnetoacoustic effects, Magnetomechanical effects, online detecting, Permanent magnet synchronous generator, Rotors

Citation Format(s)

Online Detecting Magnet Defect Fault in PMSG with Magnetic Sensing. / Xu, Qi; Liu, Xuyang; Miao, Wenchao; Pong, Philip W. T.; Liu, Chunhua.

In: IEEE Transactions on Transportation Electrification, Vol. 7, No. 4, 12.2021, p. 2775-2786.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review