Open AccessIdentification of TBAES rotating diode failure
Author(s) -
Zhang Zan,
Liu Weiguo,
Peng Jichang,
Zhao Dongdong,
Meng Tao,
Pang Ji,
Sun Chenghao
Publication year - 2017
Publication title -
iet electric power applications
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.815
H-Index - 97
eISSN - 1751-8679
pISSN - 1751-8660
DOI - 10.1049/iet-epa.2016.0468
Subject(s) - diode , electromagnetic coil , rotor (electric) , excitation , harmonic , wound rotor motor , engineering , field coil , control theory (sociology) , harmonic analysis , physics , electrical engineering , electronic engineering , computer science , voltage , acoustics , induction motor , control (management) , artificial intelligence
This study focuses on the identification of the rotating diode failures of an aircraft wound‐field synchronous starter–generator system. Owing to the difference in topography between the DC field excitation system and the three‐phase brushless asynchronous excitation system (TBAES), the rotating diodes failure identification methods for the DC field excitation system cannot be implemented in TBAES. To solve this problem, this study presents the theoretical analysis of the effects of diode failures on the TBAES rotor current. The theoretical analysis shows that the third and the fundamental components of rotor current could be treated as diode failure features. When a rotating diode operates in open‐circuit conditions, the third harmonic current of the normal phase windings increases, but it does not increase while in the fault phase. Meanwhile, the amplitude of the fundamental current of failure phase reduces. Under short‐circuit conditions, both the third harmonic and the fundamental component of the rotor current of TBAES rotor‐windings increase. On the basis of the theoretical findings, the detection of rotating diode failures is achieved by the harmonic analysis of the estimated rotor currents.