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Estimation of Effective Permeability for Dumbbell-Shaped Magnetic Cores | IEEE Journals & Magazine | IEEE Xplore

Estimation of Effective Permeability for Dumbbell-Shaped Magnetic Cores


Abstract:

The objective of this paper is to provide suitable approximations of effective permeability for magnetic concentration cores. This core has a dumbbell shape so that the m...Show More

Abstract:

The objective of this paper is to provide suitable approximations of effective permeability for magnetic concentration cores. This core has a dumbbell shape so that the magnetic flux is concentrated to the coil winding part of the core. It is well known that the demagnetizing factor strongly depends on the core shape, which defines the effective permeability. Although several researchers have already proposed an approximation for a dumbbell-shaped core, they did not take into account the flange part length. In this paper, a novel approximation for a dumbbell-shaped core is proposed. It is based on the demagnetizing factor and correction terms related to the aspect ratio of both the flange and coil winding part. From experimental results, the validity of the approximation is confirmed.
Published in: IEEE Transactions on Magnetics ( Volume: 51, Issue: 1, January 2015)
Article Sequence Number: 4000304
Date of Publication: 02 February 2015

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