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Analytical and Experimental Study for Electromagnetic Performances of a Tubular Linear Machine with Axially Magnetized Single-sided Permanent Magnets

Journal of Magnetics, Volume 20, Number 4, 31 Dec 2015, Pages 432-438

Kyung-Hun Shin (Department of Electrical Engineering, Chungnam National University), Kyoung-Hun Jeong (Department of Electrical Engineering, Chungnam National University), Jang-Young Choi *

(Department of Electrical Engineering, Chungnam National University), Keyyong Hong (Offshore Plant Research Division, Korea Research Institute of Ships and Ocean Engineering), Kyong-Hwan Kim (Offshore Plant Research Division, Korea Research Institute of Ships and Ocean Engineering)

Abstract

This paper presents an electromagnetic analysis of a tubular linear machine with axially magnetized permanent magnets using improved analytical techniques. Based on the magnetic vector potential and a two-dimensional polar-coordinate system, the magnetic field and armature reaction field can be derived. Using these, equivalent circuit parameters, such as the electromotive force and inductance, can be obtained analytically. Finally, the generating characteristics are derived with the equivalent circuit method. In this study, the finite element method was employed to provide a comparative evaluation, and experiments were conducted to validate the results of the analytical analysis.

Keywords: tubular linear machine; permanent magnet; armature reaction field; analytical solution

DOI: http://dx.doi.org/10.4283/JMAG.2015.20.4.432

Full Text: PDF

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