Fast and Accurate 2D Analytical Subdomain Method for Coaxial Magnetic Coupling Analysis

Yusuf Akcay, Paolo Giangrande, Oliver Tweedy and Michael Galea
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Yusuf Akcay: Power Electronics, Machines and Control (PEMC) Research Group, Faculty of Engineering, University of Nottingham, Nottingham NG72GT, UK
Paolo Giangrande: Power Electronics, Machines and Control (PEMC) Research Group, Faculty of Engineering, University of Nottingham, Nottingham NG72GT, UK
Oliver Tweedy: Power Electronics, Machines and Control (PEMC) Research Group, Faculty of Engineering, University of Nottingham, Nottingham NG72GT, UK
Michael Galea: Key Laboratory of More Electric Aircraft Technology of Zhejiang Province, School of Aerospace, University of Nottingham, Ningbo 315100, China

Energies, 2021, vol. 14, issue 15, 1-18

Abstract: Magnetic couplings (MCs) enable contactless speed/torque transmission via interactions between the magnetic fields of permanent magnets (PMs) rather than a physical mechanical connection. The contactless transmission of mechanical power leads to improvements in terms of efficiency and reliability due to the absence of wear between moving parts. One of the most common MC topologies is the coaxial type, also known as the radial configuration. This paper presents an analytical tool for the accurate and fast analysis of coaxial magnetic couplings (CMCs) using a two-dimensional subdomain approach. In particular, the proposed analytical tool resolves Laplace’s and Poisson’s equations for both air-gap and PM regions. The tool can be used to evaluate the impact of several design parameters on the performance of the CMC, enabling quick and accurate sensitivity analyses, which in turn guide the choice of design parameters. After discussing the building procedure of the analytical tool, its applicability and suitability for sensitivity analyses are assessed and proven with the analysis of a fully parameterized CMC geometry. The accuracy and the computational burden of the proposed analytical tool are compared against those of the finite element method (FEM), revealing faster solving times and acceptable levels of precision.

Keywords: analytical method; magnetic coupling; contactless torque transmission; finite element method; magnetic field; permanent magnet; Laplace’s equation; Poisson’s equation (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2021
References: View complete reference list from CitEc
Citations: View citations in EconPapers (2)

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