Flux control modulation for the dual active bridge DC/DC converter

Fritz, Niklas; Rashed, Mohamed; Bozhko, Serhiy; Cuomo, Fabrizio; Wheeler, Pat

Abstract

This paper introduces a modulation technique for the single-phase dual active bridge (DAB) in which the switching frequency and transformer flux linkage are modulated to achieve improved power transfer characteristics and reduced converter losses. By analysing the DAB, it is noticed that in the traditional single phase shift (SPS) modulation, the transformer flux linkage decreases with increasing power. The proposed flux control modulation (FCM) counteracts this decrease and aims to keep the transformer utilisation constant on the whole load range by a reduction in switching frequency. This has two effects: first, the reduced frequency substantially lowers switching losses and second, the power transfer characteristic of the DAB is linearised, facilitating the control of this converter. The new modulation technique is validated by simulation.

Citation

Fritz, N., Rashed, M., Bozhko, S., Cuomo, F., & Wheeler, P. (2019). Flux control modulation for the dual active bridge DC/DC converter. Journal of Engineering, 2019(17), 4353-4358. https://doi.org/10.1049/joe.2018.8014

• Journal Article Type: Article
• Acceptance Date: Jul 27, 2018
• Online Publication Date: May 20, 2019
• Publication Date: Jul 1, 2019
• Deposit Date: Jul 12, 2019
• Publicly Available Date: Jul 12, 2019
• Journal: The Journal of Engineering
• Print ISSN: 2051-3305
• Electronic ISSN: 2051-3305
• Publisher: Institution of Engineering and Technology (IET)
• Peer Reviewed: Peer Reviewed
• Volume: 2019
• Issue: 17
• Pages: 4353-4358
• DOI: https://doi.org/10.1049/joe.2018.8014
• Keywords: Dual Active Bridge, Modulation, Flux linkage, Switching losses, More Electric Aircraft
• Public URL: https://nottingham-repository.worktribe.com/output/2302629
• Publisher URL: https://ieeexplore.ieee.org/document/8737059