Fault-tolerant operation of single-phase SR generators

Sawata, T., Kjaer, P.C., Cossar, C., Miller, T.J.E. and Hayashi, Y. (1999) Fault-tolerant operation of single-phase SR generators. IEEE Transactions on Industry Applications, 35(4), pp. 774-781. (doi: 10.1109/28.777184)

Abstract

This paper studies fault-tolerant operation of multipole single-phase switched reluctance generators (SRGs), in particular, an 8/8-pole switched reluctance machine. The multipole single-phase SRG system is advantageous for reduced cost and higher efficiency compared to polyphase equivalents. However, using the classical phase-leg topology, a phase fault may prevent generating operation completely, since redundancy in the number of phases does not exist like polyphase systems. A new power converter topology which connects two coil banks in parallel is proposed for higher fault tolerance with minimum additional cost. Faulty coils can be disconnected with the proposed converter and the SRG can continue generating operation after coil faults with reduced output power. Output power per coil current under faults is studied. Open- and short-circuit coils are studied through linear analysis, finite-element analysis and static torque measurement. Generated currents under faults with the proposed converter are measured. The capability of the system to disconnect faulty coils dynamically is also shown.

• Item Type: Articles
• Status: Published
• Refereed: Yes
• Glasgow Author(s) Enlighten ID: Miller, Prof Timothy
• Authors: Sawata, T., Kjaer, P.C., Cossar, C., Miller, T.J.E., and Hayashi, Y.
• Subjects: T Technology > TA Engineering (General). Civil engineering (General)
• College/School: College of Science and Engineering > School of Engineering > Electronics and Nanoscale Engineering
• Journal Name: IEEE Transactions on Industry Applications
• Publisher: Institute of Electrical and Electronics Engineers (IEEE)
• ISSN: 0093-9994
• Copyright Holders: Copyright © 1999 Institute of Electrical and Electronics Engineers (IEEE)
• First Published: First published in IEEE Transactions on industry applications 35(4):774-781
• Publisher Policy: Reproduced in accordance with the copyright policy of the publisher