Title
Quality factor based design guideline for optimized inductive power transfer
Author
Grazian, F. (TU Delft DC systems, Energy conversion & Storage) 
Shi, W. (TU Delft DC systems, Energy conversion & Storage)
Soeiro, Thiago B. (TU Delft DC systems, Energy conversion & Storage)
Dong, J. (TU Delft DC systems, Energy conversion & Storage)
van Duijsen, P.J. (TU Delft DC systems, Energy conversion & Storage)
Bauer, P. (TU Delft DC systems, Energy conversion & Storage)
Date
2020
Abstract
In high-power wireless battery charging that uses inductive power transfer, a considerable amount of power losses are located in the transmitter and receiver coils because they carry high resonant currents and typically have a loose coupling between them which increases eddy current losses. Therefore, the nominal operation needs to be chosen such that the coils' losses are minimized. Additionally, the inverter's semiconductors soft-switching improves both the power conversion efficiency and the electromagnetic compatibility of the system, thus it needs to be safeguarded for a wide operating range. However, depending on the chosen quality factor of the coils, it might happen that the minimum coils' losses and soft-switching are not satisfied at the same time. This paper defines a guideline on the parametric selection of the coils' quality factor such that the optimum operation of both the coils and the resonant converter can be achieved simultaneously. This parametric guideline is proposed for resonant converters implementing the four basic compensation networks: series-series, series-parallel, parallel-series, and parallel-parallel. Finally, circuit examples are provided for an 11 kW wireless battery charging system.
Subject
Compensation networks
EV battery charging
Inductive power transfer
Quality factor
Wireless charging
To reference this document use:
http://resolver.tudelft.nl/uuid:b7f6f930-1d71-4b3d-a109-30add01d1f76
DOI
https://doi.org/10.1109/WoW47795.2020.9291261
Publisher
IEEE
Embargo date
2021-07-01
ISBN
978-1-7281-3747-6
Source
2020 IEEE PELS Workshop on Emerging Technologies: Wireless Power Transfer (WoW)
Event
2020 IEEE PELS Workshop on Emerging Technologies: Wireless Power Transfer, WoW 2020, 2020-11-15 → 2020-11-19, Virtual, Seoul, Korea, Republic of
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.
Part of collection
Institutional Repository
Document type
conference paper
Rights
© 2020 F. Grazian, W. Shi, Thiago B. Soeiro, J. Dong, P.J. van Duijsen, P. Bauer