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Lookup NU author(s): Dr Rafal Wrobel
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© 2016 IEEE.This paper presents a coupled electromagnetic and thermal design methodology which addresses the problem of balancing accuracy against computation time. A case study on a short-duty permanent-magnet (PM) linear actuator is used to illustrate the approach. The proposed method employs a two-dimensional electromagnetic finite-element (FE) model coupled with a detailed thermal equivalent circuit (TEC) model which is automatically constructed and parameterized using geometric and material data. A numerical method of estimating the equivalent thermal properties of the winding amalgam is used along with published empirically derived convection and radiation heat transfer correlations. The relatively high number of network nodes and more accurate thermal material properties minimizes model calibration and allows improved temperature prediction, including winding hot spots, while maintaining a low computational cost for both steady-state and transient analyses. A comparison between experimental and theoretical actuator performance shows that the design methodology provides good accuracy electromagnetic and transient thermal performance predictions without the need for direct model calibration and can yield an optimized design within an acceptable time frame.
Author(s): Simpson N, Wrobel R, Mellor PH
Publication type: Article
Publication status: Published
Journal: IEEE Transactions on Industry Applications
Print publication date: 01/07/2016
Online publication date: 11/03/2016
Acceptance date: 15/02/2016
ISSN (print): 0093-9994
ISSN (electronic): 1939-9367
Publisher: Institute of Electrical and Electronics Engineers Inc.
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