NDLI: Modular airgap windings for linear permanent magnet machines

Content Provider	IET Digital Library
Author	Colyer, Stephen P. Arumugam, Puvan Eastham, John F.
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.
Starting Page	953
Ending Page	961
Page Count	9
ISSN	17518660
Volume Number	12
e-ISSN	17518679
Issue Number	Issue 7, Aug (2018)
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/iet-epa/12/7
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/10.1049/iet-epa.2017.0668
Journal	IET Electric Power Applications
Publisher Date	2018-04-03
Access Restriction	Open
Rights Holder	© The Institution of Engineering and Technology
Subject Keyword	12-Coil/14-pole Design 3-coil/4-pole Design A.C. Machine Attraction Force Control of Electric Power System D.C. Machines Design Comparisons Finite Element Analysis High Fundamental Winding Factors Higher Winding Factor Linear Permanent Magnet Machine Lower Supply VA/N Machine Windings Modular Airgap Windings Offset Concentrated Wound Air-core Linear Synchronous Machine Offset Winding Permanent Magnet Machine Reduced Supply Volt-amp Rotors Selected Designs Stators Synchronous Machine Winding Factor Model
Content Type	Text
Resource Type	Article
Subject	Electrical and Electronic Engineering

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