Determining Relation between Size of Polarized Inductive Couplers and Nominal Airgap

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Abstract

Inductive power transfer (IPT) is gaining popularity across a wide range of battery charging applications like biomedical, consumer electronics and electric vehicle (EV) charging. One of the major challenges in designing IPT charge pads is determining the optimal physical sizes of the magnetic couplers resulting in efficient power transfer and low cost of materials. In EV applications, it is especially difficult due to the variation in nominal air gap, required power levels associated with different vehicle classes, and charging locations that may be encountered. This paper aims to determine the relationship between optimal coupler sizes and the nominal air gap of an IPT system. Finite element analysis (FEA) is used to model the electromagnetic behavior of the magnetic couplers. A multi-objective optimization framework is built to reveal the Pareto fronts which show the trade-offs between the power transfer efficiencies and the coupler power densities at different air gaps. This method is applied on polarized double-D (DD) couplers for a 5 kW IPT system at different air gaps. Analyzing the power densities of the Pareto Optimal designs an approximate relation between optimal pad sizes and the air gap is derived. Results show that there is an exponential relationship between the optimal coupler sizes and the nominal air gap.

Original languageEnglish
Title of host publication2018 IEEE 18th International Conference on Power Electronics and Motion Control (PEMC)
PublisherIEEE
Pages248-255
Number of pages8
ISBN (Electronic)978-1-5386-4198-9
ISBN (Print)978-1-5386-4199-6
DOIs
Publication statusPublished - 2018
Event18th IEEE International Conference on Power Electronics and Motion Control, PEMC 2018 - Budapest, Hungary
Duration: 26 Aug 201830 Aug 2018

Conference

Conference18th IEEE International Conference on Power Electronics and Motion Control, PEMC 2018
CountryHungary
CityBudapest
Period26/08/1830/08/18

Bibliographical note

Green Open Access added to TU Delft Institutional Repository ‘You share, we take care!’ – Taverne project https://www.openaccess.nl/en/you-share-we-take-care  Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.

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