Manufacturing Challenges of a Modular Transverse Flux Alternator for Aerospace

This paper presents the manufacturing challenges of a transverse flux alternator for an aerospace application. For fault tolerance, four independent isolated phases are required to deliver a specific power at low speeds, whilst at over speed, there is a strict limit on the short circuit current. A t...

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Bibliographic Details
Published inEnergies (Basel) Vol. 13; no. 16; p. 4275
Main Authors Kulan, Mehmet C., Baker, Nick J., Turvey, Simon
Format Journal Article
LanguageEnglish
Published Basel MDPI AG 01.08.2020
Subjects
aerospace
Alternators
Design
Design optimization
Fault tolerance
Fluctuations
Flux
High speed
Inductance
Manufacturing
modular machine
permanent magnet alternator
Phases
Renewable resources
segmented machine
Segments
Short circuit currents
Short-circuit current
soft magnetic composites
Stators
transverse flux machine
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Summary:This paper presents the manufacturing challenges of a transverse flux alternator for an aerospace application. For fault tolerance, four independent isolated phases are required to deliver a specific power at low speeds, whilst at over speed, there is a strict limit on the short circuit current. A transverse flux machine (TFM) was selected due to its high inductance combined with the modular nature of separate phases lending itself to fault tolerance. The stator consists of pressed soft magnetic composite (SMC) segments. The authors explore the electromagnetic, mechanical, and assembly design challenges of the machine. It is shown that mechanical design aspects of the segments are of equal importance to the electromagnetic design and optimization. Simple design choices have allowed the same component to be used as all the stator segments, despite the requirement of a 90° electrical phase difference between phases and a tooth offset of 180° electrical within each phase.
ISSN:1996-1073
1996-1073
DOI:10.3390/en13164275