Operation of a fault tolerant PM drive for an aerospace fuel pump application

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Operation of a fault tolerant PM drive for an aerospace fuel pump application

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The paper discusses the design of a fault tolerant permanent magnet drive based on a 16 kW, 13000 rev/min aircraft fuel pump specification. A ‘proof of concept’ demonstrator has been built to this design and key parameters measured on the demonstrator drive are given. A novel current controller with near optimal transient performance is developed to enable precise shaping of the phase currents at high shaft speeds. A list of the most likely electrical faults is considered. Fault detection and identification schemes are developed for rapid detection of turn to turn faults and power device short circuit faults. Post fault control strategies are described which enable the drive to continue to operate indefinitely in the presence of each fault. Finally, results show the initially healthy drive operating up to, through and beyond the introduction of two of the more serious faults.

Inspec keywords: reliability; power convertors; permanent magnet motors; aircraft; electric current control; machine control; electrical faults; aerospace control; fuel; pumps; motor drives

Other keywords: shaft speed; near optimal transient performance; power device short circuit faults; phase current shaping; fault identification; fault-tolerant PM motor drive; turn to turn faults; proof of concept; fault detection; aerospace fuel pump application; current controller

Subjects: Control technology and theory (production); Drives; a.c. machines; Power convertors and power supplies to apparatus; Maintenance and reliability; Control of electric power systems; d.c. machines; Reliability; Current control; Aerospace industry; Aerospace instrumentation and equipment; Fuel processing industry; Aerospace control

References

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      • B.C. Mecrow , A.G. Jack , J.A. Haylock , J. Coles . Fault tolerant permanent magnet machine drives. IEE Proc., Electr. Power Appl. , 6 , 437 - 442
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      • T.J.E. Miller . Converter volt-ampere requirements of the switched reluctance motor drive. IEEE Trans. Ind. Appl. , 5 , 1136 - 1144
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      • R. Spee , A.K. Wallace . Remedial strategies for brushless DC drive failures. IEEE Trans. Ind. Appl. , 2 , 259 - 266
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      • Haylock, J.A., Mecrow, B.C., Jack, A.G., Atkinson, D.J.: `Operation of fault tolerant machines with winding failures', Proceedings of IEEE international Electric machines anddrives conference, 1997.
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      • A.G. Jack , B.C. Mecrow , J.A. Haylock . A comparative study of permanent magnet and switched reluctance motors for high performance fault tolerant applications. IEEE Trans. Ind. Appl. , 4 , 889 - 895
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      • T.J.E. Miller . Faults and unbalanced forces in the switched reluctance machine. IEEE Trans. Ind. Appl. , 2 , 319 - 328
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      • White, R.V.: `Fault tolerance in distributed power systems', Proceedings of EPE'95, 1995, p. 2.851–2.857.
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