Design Trade-Offs Between the Coupled Coils’ Inductance and the Series-Series Compensation Capacitance for EV Wireless Charging Systems

Francesca Grazian, Thiago Batista Soeiro, Pavol Bauer

Research output: Chapter in Book/Conference proceedings/Edited volumeConference contributionScientificpeer-review

1 Citation (Scopus)
45 Downloads (Pure)

Abstract

Nowadays, inductive power transfer (IPT) with magnetic resonance is the most used method for high-power wireless battery charging applications. Once the topology of the compensation network and the operating frequency are selected, there are infinite combinations of the circuit equivalent inductance and compensation capacitance values resonating at that frequency. Choosing an appropriate ratio between these passive devices is essential to meet the target output power while ensuring that the required DC input and output voltages are found within the permitted range limited by the power source and the battery load. This paper proposes design trade-offs for selecting the optimum ratio between the inductance and capacitance in IPT systems with series-series compensation applicable to any power level. First, the target mutual inductance must be computed. Based on that, the coupled coils are designed depending on the physical constraints. An example is provided considering a 3.7 kW wireless charging system for electric vehicles (EVs) where different coils’ combinations are analyzed through the finite element method. The most suitable design is implemented, achieving or the application a relatively high measured peak DC-to-DC efficiency of about 96.24% at 3.28kW while the coils are aligned with 11cm distance. The required power is delivered at different battery voltages and coils’ alignments by regulating the DC input voltage.
Original languageEnglish
Title of host publicationProceedings of the 2022 International Symposium on Power Electronics, Electrical Drives, Automation and Motion (SPEEDAM)
PublisherIEEE
Pages270-276
Number of pages7
ISBN (Electronic)978-1-6654-8459-6
ISBN (Print)978-1-6654-8460-2
DOIs
Publication statusPublished - 2022
Event 2022 International Symposium on Power Electronics, Electrical Drives, Automation and Motion (SPEEDAM) - Sorrento, Italy
Duration: 22 Jun 202224 Jun 2022

Publication series

Name2022 International Symposium on Power Electronics, Electrical Drives, Automation and Motion, SPEEDAM 2022

Conference

Conference 2022 International Symposium on Power Electronics, Electrical Drives, Automation and Motion (SPEEDAM)
Country/TerritoryItaly
CitySorrento
Period22/06/2224/06/22

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.

Keywords

  • Electric vehicles
  • inductive power transfer
  • series-series compensation network
  • wireless charging

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