Analytical Prediction of the Short-Circuit Current in Fault-Tolerant Permanent-Magnet Machines

This paper describes an analytical technique that can be utilized to predict the short-circuit current in a fault-tolerant permanent-magnet machine under partial-turn short-circuit fault conditions. It has been shown that the current in partially short-circuited turns is dependent on their relative...

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Bibliographic Details
Published in:IEEE transactions on industrial electronics (1982) 2008-12, Vol.55 (12), p.4210-4217
Main Authors: Zhigang Sun, Jiabin Wang, Howe, D., Jewell, G.
Format: Article
Language:English
Subjects:
Aerospace safety
Analytical models
Circuit faults
Fault tolerance
Fault tolerant
Fault tolerant systems
Faults
Finite element method
Flux
Industrial electronics
Iron
Mathematical analysis
Mathematical models
partial-turn short circuit
permanent-magnet (PM) machines
Pulse width modulation inverters
short-circuit current
Sun
Topology
Voltage
Winding
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Summary:This paper describes an analytical technique that can be utilized to predict the short-circuit current in a fault-tolerant permanent-magnet machine under partial-turn short-circuit fault conditions. It has been shown that the current in partially short-circuited turns is dependent on their relative position in the slot where the phase winding is accommodated, and the slot-leakage flux associated with these turns has a significant influence on the short-circuit current when a remedial action has been applied. An analytical model that quantifies the variation of the slot-leakage flux as a function of the relative position of partially short-circuited turns has been developed. Both finite-element analysis and experimental results demonstrate the effectiveness of the proposed technique for predicting the short-circuit current.
ISSN:0278-0046
1557-9948
DOI:10.1109/TIE.2008.2005019