Modular airgap windings for linear permanent magnet machines

Stephen P. Colyer, Puvan Arumugam, John F. Eastham

Research output: Contribution to journalArticle

Abstract

This study proposes an offset concentrated wound air-core linear synchronous machine for launch applications where reduced supply volt-amp per newton (VA/N) and attraction force is essential. A winding factor model based on the conductor distribution is derived and used to analyse the winding factor of possible topologies. Two configurations, 3-coil/4-pole and 12- coil/14-pole, have high fundamental winding factors and are selected for the design comparisons. Machines using single- and double-sided offset windings are compared. The results obtained for these selected designs show that the 3-coil/4-pole design with offset winding provides the highest thrust due to its higher winding factor, but the 12-coil/14-pole design has lower supply VA/N. The implementation of the offset windings reduces VA/N. A significant reduction can be seen when the long stator short rotor arrangement is considered. A half-segment prototype is built and tested. The experimental results obtained validate both the algebraic and three-dimensional finite element analysis.

Original languageEnglish
Pages (from-to)953-961
Number of pages9
JournalIET Electric Power Applications
Volume12
Issue number7
Early online date5 Jun 2018
DOIs
Publication statusPublished - 1 Aug 2018

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Permanent magnets
Poles
Stators
Rotors
Topology
Finite element method
Air

ASJC Scopus subject areas

  • Electrical and Electronic Engineering

Cite this

Modular airgap windings for linear permanent magnet machines. / Colyer, Stephen P.; Arumugam, Puvan; Eastham, John F.

In: IET Electric Power Applications, Vol. 12, No. 7, 01.08.2018, p. 953-961.

Research output: Contribution to journalArticle

Colyer, Stephen P. ; Arumugam, Puvan ; Eastham, John F. / Modular airgap windings for linear permanent magnet machines. In: IET Electric Power Applications. 2018 ; Vol. 12, No. 7. pp. 953-961.
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