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 novel modulation technique for the single phase Dual Active Bridge (DAB) in which the switching frequency and transformer flux are modulated to achieve improved power transfer characteristics and reduced converter losses. By analyzing 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 utilization 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 linearized, 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. (2018, April). Flux control modulation for the dual active bridge DC/DC converter. Paper presented at 9th International Conference on Power Electronics, Machines and Drives (PEMD 2018)

• Presentation Conference Type: Conference Paper (unpublished)
• Conference Name: 9th International Conference on Power Electronics, Machines and Drives (PEMD 2018)
• Start Date: Apr 17, 2018
• End Date: Apr 19, 2018
• Acceptance Date: Feb 14, 2018
• Publication Date: Apr 17, 2018
• Deposit Date: Apr 27, 2018
• Publicly Available Date: Nov 6, 2018
• Peer Reviewed: Peer Reviewed
• Keywords: Dual Active Bridge, Modulation, Flux linkage, Switching losses, More Electric Aircraft
• Public URL: https://nottingham-repository.worktribe.com/output/925861
• Related Public URLs: http://www.theiet.org/pemd
• Contract Date: Apr 26, 2018