A1 Journal article (refereed), original research

Magneto-Thermal Analysis of an Axial-Flux Permanent-Magnet-Assisted Eddy-Current Brake at High-Temperature Working Conditions


Open Access publication

Publication Details
Authors: Gülec Mehmet, Aydin Metin, Nerg Janne, Lindh Pia, Pyrhönen Juha
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Publication year: 2020
Language: English
Related Journal or Series Information: IEEE Transactions on Industrial Electronics
ISSN: 0278-0046
eISSN: 1557-9948
JUFO-Level of this publication: 3
Open Access: Open Access publication
Location of the parallel saved publication: http://urn.fi/URN:NBN:fi-fe202101222502

Abstract

This paper proposes an analytic coupled magneto-thermal analysis of an
axial-flux (AF) permanent-magnet-assisted (PMA) eddy-current brake (ECB)
at high-temperature working conditions. In the topology investigated,
permanent magnets (PMs) are placed into stator slot openings to increase
the braking torque production capability. This modification enables to
control the magnet flux by altering the DC excitation current. However,
the utilization of PMs will make the construction vulnerable at high
operating temperatures simply because the magnet properties and the
brake capability are strongly dependent on temperature. Such problems
require complex coupled multiphysics finite element analyses (FEA) to
obtain the actual brake performance. The proposed approach offers a
simple and effective solution that consists of magnetic and thermal
models, which are coupled to each other in the time domain. The
nonlinear electrical, magnetic and thermal properties are influenced by
the temperature variation in time. An AF-PMA-ECB prototype is
manufactured to validate the proposed coupled models and the
experimental studies confirm that the proposed approach provides very
practical results to determine the working conditions of the AF-PMA-ECB
at high-temperature operations.


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Last updated on 2021-22-01 at 10:59