NDLI: Research on an online diagnosis for rotating diode faults in three-phase brushless exciter with two coils

Content Provider	IET Digital Library
Author	Yucai, Wu Bochong, Cai Qianqian, Ma
Abstract	The rotating rectifier is prone to be damaged in the exciter of the brushless excitation system, wherein a diode open-circuit fault which is common can affect the normal and safe operations of a generator. On the basis of the structure of the brushless exciter, this study, analysed the effect that an open-circuit in one and two diodes had on armature current and armature field, and put forward a new online detection method for diode open-circuit fault. In this method, two magnetic field detection coils are installed on the stator iron yoke of the brushless exciter, and the open-circuit fault of the diodes can be reflected by the induced voltage difference of the two detection coils. Using a 16-pole, three-phase brushless exciter as an example, the performance of this new diagnosis method was verified by using a finite element simulation.
Starting Page	101
Ending Page	109
Page Count	9
ISSN	17518660
Volume Number	13
e-ISSN	17518679
Issue Number	Issue 1, Jan (2019)
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/iet-epa/13/1
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/10.1049/iet-epa.2018.5161
Journal	IET Electric Power Applications
Publisher Date	2018-09-17
Access Restriction	Open
Rights Holder	© The Institution of Engineering and Technology
Subject Keyword	A.C. Machine Armature Field Brushless DC Motor Brushless Excitation System Brushless Machines D.C. Machines Diagnosis Method Diode Diode Fault Diode Open-circuit Fault Exciters Fault Diagnosis Finite Element Analysis Machine Testing Magnetic Field Detection Coils Normal Operation Numerical Analysis Online Detection Method Online Diagnosis Rectifier Rotating Rectifier Safe Operation Stators Synchronous Machine Three-phase Brushless Exciter
Content Type	Text
Resource Type	Article
Subject	Electrical and Electronic Engineering

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