Open AccessInvestigation of fault‐tolerant capability of five‐phase doubly salient electromagnetic generator
Author(s) -
Zhao Yao,
Wang Huizhen,
Xiao Lan
Publication year - 2015
Publication title -
iet electric power applications
Language(s) - English
Resource type - Journals
ISSN - 1751-8679
DOI - 10.1049/iet-epa.2014.0058
Subject(s) - flux linkage , armature (electrical engineering) , counter electromotive force , engineering , fault (geology) , electromotive force , magnetic circuit , control theory (sociology) , topology (electrical circuits) , electrical engineering , computer science , voltage , electromagnetic coil , induction motor , control (management) , artificial intelligence , seismology , geology , direct torque control
A new topology of five‐phase fault‐tolerant doubly salient electromagnetic generator (FTDSEG) is proposed for high reliability applications in this paper. The analysis of no‐load and loading operations shows the potential fault‐tolerance capability. On the basis of comparative analysis on structure characteristics between five‐phase non‐FTDSEG (NFTDSEG) and five‐phase FTDSEG, the variation of rotor pole number from NFTDSEG to FTDSEG is revealed. Meanwhile, the flux linkage and electromotive forces (EMFs) of five‐phase NFTDSEG and five‐phase FTDSEG are investigated with finite element method and five faults of five‐phase FTDSEG are analysed in detail. Especially when single phase short‐circuit fault happens, the magnetic field of the motor, flux linkage of short‐circuit phase and short‐circuit currents without load are investigated in four different short‐circuit moments and the fault is in consideration of armature winding resistance. The ultimate variation trend of flux linkage is irrelevant to moment when the short‐circuit fault happens. The flux linkage and EMF of short‐circuit phase are also analysed. The laws of fault operating influence on external and power characteristics of FTDSEG are researched in five faults with different exciting currents. The fault‐tolerant ability of five‐phase FTDSEG has been demonstrated by the experimental results.