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Prediction of the Inductance in a Synchronous Linear Permanent Magnet Generator

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Author(s): Boel Ekergård | Rafael Waters | Mats Leijon

Journal: Journal of Electromagnetic Analysis and Applications
ISSN 1942-0730

Volume: 03;
Issue: 05;
Start page: 155;
Date: 2011;
Original page

Keywords: Wave Power | Synchronous Linear Permanent Magnet Generator | Varying Inductance | ABC of Frame Reference

ABSTRACT
This paper presents calculations of the varying inductances profile for a synchronous linear surface mounted permanent magnet generator in an ABC reference system. Calculations are performed by utilizing the reluctance term, known from analytic calculations and finite element method simulations. With the inductance term identified, the voltage difference between the generator’s no load and load voltage can be calculated and an external circuit can be designed for optimal use of the generator. Two different operation intervals of the linear generator are considered and the results are discussed. The result indicates that time costly finite element simulations can be replaced with simple analytical calculations for a surface mounted permanent magnet linear generator.
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