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Detailed study of the magnetic circuit in a longitudinal flux permanent-magnet synchronous linear generator

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3 Author(s)
Danielsson, O. ; Dept. of Eng. Sci., Uppsala Univ., Sweden ; Leijon, M. ; Sjostedt, E.

We present the results of a theoretical study of the magnetic circuit of a longitudinal flux permanent-magnet synchronous linear generator. In our study, we used a coupled field and circuit model solved by a time-stepping finite-element technique to analyze the machine. We investigated the effects of different permanent-magnet shapes and sizes, as well as different stator steel geometries. We noted a significant difference in performance for different magnet shapes. Our results also illustrate how small changes, on a millimeter scale, will affect the flux path, and thereby the overall performance of the machine, highlighting the importance of stator steel geometry.

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Magnetics, IEEE Transactions on  (Volume:41 ,  Issue: 9 )