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Energies 2015, 8(8), 8069-8085; doi:10.3390/en8088069

Electromagnetic Design and Analysis of a Novel Fault-Tolerant Flux-Modulated Memory Machine

Department of Electrical Engineering, the Hong Kong Polytechnic University, Hong Kong, China
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Author to whom correspondence should be addressed.
Academic Editor: Paul Stewart
Received: 8 June 2015 / Accepted: 28 July 2015 / Published: 3 August 2015
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Abstract

Electric machines play an important role in modern energy conversion systems. This paper presents a novel brushless fault-tolerant flux-modulated memory (FTFM) machine, which incorporates the merits of a flux-modulated permanent magnet machine and multi-phase memory machine and is very suitable for applications that require wide speed ranges of constant-power operation. Due to the magnetic modulation effect, the FTFM machine can produce a large torque at relatively low speeds. Due to the usage of aluminum-nickel-cobalt (AlNiCo) magnets, this machine can readily achieve a flexible air-gap flux controllability with temporary DC current pulses. Consequently, the constant-power region is effectively expanded, and the machine\'s efficiency during constant-power operation is increased. Due to the multi-phase armature winding design, the FTFM machine enables lower torque ripple, increased fault tolerance ability and a higher possibility of splitting the machine power through a higher number of phases, thus the per-phase converter rating can be reduced. The design methodology and working principle of this kind of machine are discussed. The electromagnetic performances of the proposed machine are analyzed using the time-stepping finite element method (TS-FEM). View Full-Text
Keywords: constant-power region; fault-tolerant machine; finite element method; memory machine constant-power region; fault-tolerant machine; finite element method; memory machine
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Wang, Q.; Niu, S. Electromagnetic Design and Analysis of a Novel Fault-Tolerant Flux-Modulated Memory Machine. Energies 2015, 8, 8069-8085.

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