Ansari, S.A., Davidson, J.N. orcid.org/0000-0002-6576-3995 and Foster, M.P. orcid.org/0000-0002-8565-0541 (2020) Analysis, design and modelling of two fully- integrated transformers with segmental magnetic shunt for LLC resonant converters. In: IECON 2020 : The 46th Annual Conference of the IEEE Industrial Electronics Society. IECON 2020 - 46th Annual Conference of the IEEE Industrial Electronics Society, 18-21 Oct 2020, Singapore. Institute of Electrical and Electronics Engineers (IEEE) , pp. 1273-1278. ISBN 9781728154152
Abstract
To achieve a precise, high leakage inductance for an integrated magnetic transformer, a magnetic shunt (based on low- permeability materials) is usually added to the planar transformer. However, high-performance low-permeability power materials are not readily available in the market. Therefore, two new topologies for shunt-inserted planar transformer are proposed in this paper. In the proposed topologies, the magnetic shunts are based on high-permeability materials like ferrite, which is widely available, and use multiple small gaps to approximate a low-permeability material as an alternative to a low-permeability magnetic shunt. The analysis, design and modelling of the proposed planar transformers are presented in detail. It is shown that the magnetizing inductance can be controlled by vertical air gaps and the leakage inductance value can be controlled by the thickness of the shunt. Hence, the desirable leakage inductance and magnetizing inductance values for the integrated transformer can be obtained for use in LLC resonant converters. The theoretical analyses are verified by finite element analysis (FEA) and the AC resistance for the proposed topologies is discussed.
Metadata
Item Type: | Proceedings Paper |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © 2020 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other users, including reprinting/ republishing this material for advertising or promotional purposes, creating new collective works for resale or redistribution to servers or lists, or reuse of any copyrighted components of this work in other works. Reproduced in accordance with the publisher's self-archiving policy. |
Keywords: | LLC resonant converter; planar Transformer; magnetic shunt; magnetizing inductance; leakage inductance |
Dates: |
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Institution: | The University of Sheffield |
Academic Units: | The University of Sheffield > Faculty of Engineering (Sheffield) > Department of Electronic and Electrical Engineering (Sheffield) |
Depositing User: | Symplectic Sheffield |
Date Deposited: | 12 May 2022 12:01 |
Last Modified: | 14 May 2022 03:55 |
Status: | Published |
Publisher: | Institute of Electrical and Electronics Engineers (IEEE) |
Refereed: | Yes |
Identification Number: | 10.1109/iecon43393.2020.9254721 |
Related URLs: | |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:186257 |