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Magnetic design considerations to improve nonlinear characteristics of inductively coupled power transfer systems

Magnetic design considerations to improve nonlinear characteristics of inductively coupled power transfer systems
Magnetic design considerations to improve nonlinear characteristics of inductively coupled power transfer systems
Purpose – This study seeks to apply finite element analysis to study the proximity effect in amulti-pickup inductively coupled power transfer system, quantify the effect and propose improved pick-up configurations. Design/methodology/approach – A mixture of approximate analytical formulae and accurate finite-element simulations has been used as a tool for qualitative and quantitative analysis. Simplified consideration of magnetic flux paths aids understanding, whereas detailed numerical computation provides reliable performance prediction. Findings – It is shown that a multi-pickup formation of conventional E-pickups may lead to power loss due to negative coupling between neighbouring pickups and that the phenomenon is nonlinear. Thus, two novel configurations for multi-pickup systems have been proposed, an alternately-directed Z-pickup and a spilt-type E-pickup, both showing improved linearity, increased total power and more efficient use of ferromagnetic material. Research limitations/implications – The investigation aimed mainly at the electromagnetic performance, while economic issues will still need to be addressed. Practical implications – The proposed pick-up configurations may be very helpful in systems where improved performance is needed but space or configuration limitations restrict or eliminate the possibility of using other designs. Originality/value – The finite-element aided magnetic field simulation has proved invaluable in achieving difficult design objectives. The combination of a simplified analytical approach and detailed numerical analysis has provided a reliable tool for accomplishing improved designs.
Inductively coupled power transfer systems, Finite element analysis, Design methods
0332-1649
965-973
Kacprzak, D.
a448d094-6fc1-4b8e-9825-ed6d1c310f7b
Sykulski, J.K.
d6885caf-aaed-4d12-9ef3-46c4c3bbd7fb
Kacprzak, D.
a448d094-6fc1-4b8e-9825-ed6d1c310f7b
Sykulski, J.K.
d6885caf-aaed-4d12-9ef3-46c4c3bbd7fb

Kacprzak, D. and Sykulski, J.K. (2007) Magnetic design considerations to improve nonlinear characteristics of inductively coupled power transfer systems. COMPEL: The International Journal for Computation and Mathematics in Electrical and Electronic Engineering, 26 (4), 965-973.

Record type: Article

Abstract

Purpose – This study seeks to apply finite element analysis to study the proximity effect in amulti-pickup inductively coupled power transfer system, quantify the effect and propose improved pick-up configurations. Design/methodology/approach – A mixture of approximate analytical formulae and accurate finite-element simulations has been used as a tool for qualitative and quantitative analysis. Simplified consideration of magnetic flux paths aids understanding, whereas detailed numerical computation provides reliable performance prediction. Findings – It is shown that a multi-pickup formation of conventional E-pickups may lead to power loss due to negative coupling between neighbouring pickups and that the phenomenon is nonlinear. Thus, two novel configurations for multi-pickup systems have been proposed, an alternately-directed Z-pickup and a spilt-type E-pickup, both showing improved linearity, increased total power and more efficient use of ferromagnetic material. Research limitations/implications – The investigation aimed mainly at the electromagnetic performance, while economic issues will still need to be addressed. Practical implications – The proposed pick-up configurations may be very helpful in systems where improved performance is needed but space or configuration limitations restrict or eliminate the possibility of using other designs. Originality/value – The finite-element aided magnetic field simulation has proved invaluable in achieving difficult design objectives. The combination of a simplified analytical approach and detailed numerical analysis has provided a reliable tool for accomplishing improved designs.

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More information

Published date: August 2007
Keywords: Inductively coupled power transfer systems, Finite element analysis, Design methods
Organisations: EEE

Identifiers

Local EPrints ID: 264481
URI: http://eprints.soton.ac.uk/id/eprint/264481
ISSN: 0332-1649
PURE UUID: cb1bd415-b94e-4072-91c6-c8bddb18ecec
ORCID for J.K. Sykulski: ORCID iD orcid.org/0000-0001-6392-126X

Catalogue record

Date deposited: 07 Sep 2007
Last modified: 07 Oct 2020 02:27

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