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Implementation of a DC current sensing transformer with H-bridge MOSFET rectifier in a resonant LLC converter

Implementation of a DC current sensing transformer with H-bridge MOSFET rectifier in a resonant LLC converter
Implementation of a DC current sensing transformer with H-bridge MOSFET rectifier in a resonant LLC converter

This paper presents experimental implementation and tests the efficacy of a current feedback circuit for an LLC resonant convertor, working as a battery charger. The circuit is based on a current transformer and a second H-bridge which is synchronised with the first side H-bridge of the converter. The proposed solution, along with all mandatory requirements such as galvanic isolation, stability, fast response, offers intermittent synchronisation between the full bridge of the converter and the feedback circuit. The paper clarifies the application of the proposed current sense circuit as a current feedback loop, which is part of a digital control system. The implementation of the current measurement circuit is shown and proved experimentally.

feedback, full-bridge, LLC resonant converter, soft switching
IEEE
Dimitrov, Borislav
7731fbe8-bd2b-4dd1-8594-75beb831826a
Sharkh, Suleiman
c8445516-dafe-41c2-b7e8-c21e295e56b9
Cruden, Andrew
ed709997-4402-49a7-9ad5-f4f3c62d29ab
Balabozov, Iosko
f1fd0f8a-0710-42c9-b3af-f5c5d13f60d6
Dimitrov, Borislav
7731fbe8-bd2b-4dd1-8594-75beb831826a
Sharkh, Suleiman
c8445516-dafe-41c2-b7e8-c21e295e56b9
Cruden, Andrew
ed709997-4402-49a7-9ad5-f4f3c62d29ab
Balabozov, Iosko
f1fd0f8a-0710-42c9-b3af-f5c5d13f60d6

Dimitrov, Borislav, Sharkh, Suleiman, Cruden, Andrew and Balabozov, Iosko (2018) Implementation of a DC current sensing transformer with H-bridge MOSFET rectifier in a resonant LLC converter. In 2018 20th International Symposium on Electrical Apparatus and Technologies (SIELA). IEEE. 4 pp . (doi:10.1109/SIELA.2018.8447120).

Record type: Conference or Workshop Item (Paper)

Abstract

This paper presents experimental implementation and tests the efficacy of a current feedback circuit for an LLC resonant convertor, working as a battery charger. The circuit is based on a current transformer and a second H-bridge which is synchronised with the first side H-bridge of the converter. The proposed solution, along with all mandatory requirements such as galvanic isolation, stability, fast response, offers intermittent synchronisation between the full bridge of the converter and the feedback circuit. The paper clarifies the application of the proposed current sense circuit as a current feedback loop, which is part of a digital control system. The implementation of the current measurement circuit is shown and proved experimentally.

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More information

Published date: 24 August 2018
Venue - Dates: 20th International Symposium on Electrical Apparatus and Technologies, SIELA 2018, Bourgas, Bulgaria, 2018-06-03 - 2018-06-06
Keywords: feedback, full-bridge, LLC resonant converter, soft switching

Identifiers

Local EPrints ID: 425064
URI: http://eprints.soton.ac.uk/id/eprint/425064
PURE UUID: 305601ef-b5f8-47d4-b6e1-793ab42a785d
ORCID for Andrew Cruden: ORCID iD orcid.org/0000-0003-3236-2535

Catalogue record

Date deposited: 10 Oct 2018 16:30
Last modified: 20 Jul 2019 00:42

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Contributors

Author: Borislav Dimitrov
Author: Suleiman Sharkh
Author: Andrew Cruden ORCID iD
Author: Iosko Balabozov

University divisions

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