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Lookup NU author(s): Sana Ullah,
Dr Stephen McDonald,
Dr Richard Martin,
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© 2016 IEEE.Actuators for more electric aircraft are predominantly based on permanent magnet machines for the best power to weight ratio. However, permanent magnet machines can give rise to drag torque under short circuit conditions. This paper explains the concept of permanent magnet assistance in switched reluctance machines and sets out a topology which maximizes the benefits of permanent magnet assistance without compromising fault tolerance. The problem of demagnetization in this topology is explored and a revised design proposed. The increased torque from permanent magnet assistance is demonstrated, and laboratory tests on a prototype machine evidence the fault tolerant nature of the proposed machine by comparison with a baseline permanent magnet machine design. It is suggested that the permanent magnet assisted segmental rotor switched reluctance machine could achieve similar torque to a permanent magnet machine in this application with much improved fault tolerance and with much reduced magnet mass.
Author(s): Ullah S, McDonald SP, Martin R, Atkinson GJ
Publication type: Conference Proceedings (inc. Abstract)
Publication status: Published
Conference Name: 2016 22nd International Conference on Electrical Machines, ICEM 2016
Year of Conference: 2016
Online publication date: 03/11/2016
Acceptance date: 02/04/2016
Publisher: Institute of Electrical and Electronics Engineers Inc.
Library holdings: Search Newcastle University Library for this item