Open AccessFlux control modulation for the dual active bridge DC/DC converter
Author(s) -
Fritz Niklas,
Rashed Mohamed,
Bozhko Serhiy,
Cuomo Fabrizio,
Wheeler Pat
Publication year - 2019
Publication title -
the journal of engineering
Language(s) - English
Resource type - Journals
ISSN - 2051-3305
DOI - 10.1049/joe.2018.8014
Subject(s) - flux linkage , transformer , maximum power transfer theorem , modulation (music) , control theory (sociology) , forward converter , materials science , ac power , physics , power (physics) , electrical engineering , engineering , computer science , boost converter , control (management) , voltage , acoustics , artificial intelligence , direct torque control , quantum mechanics , induction motor
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.