摘要详情

ID / 提交时间

73 / 2025-02-12 09:57:24

标题

Current Stress Optimization of a DAB Converter Based on a Digital Controlled Variable Inductance

关键字

DAB, Single phase shift control , Digital controlled variable inductance , Current Stress ,ZVS.

主题及专题

Review group 5

状态

全文录用

作者

BOYANG LIU / University of Electronic Science Technology of China

Garcia Cristian / Universidad de Talca

Jose Rodriguez / Universidad San Sebastian

Bo Long / university of electronic science and technology of china

摘要

The dual active full bridge bidirectional DC-DC converter has become a key energy conversion device due to its bidirectional energy transfer and implementation of zero voltage activation(ZVS). Single phase shift control (SPS) is currently the most mature and widely used control method in the market. However, this method is subject to excessive current stress during application, which seriously affects the lifespan of the device and reduces efficiency. And controlling the change in sensing value can effectively reduce current stress. The most commonly used electromagnetic variable inductance currently has unstable inductance parameter control due to electromagnetic interference. Therefore, this article proposes a hybrid control method that combines SPS control and variable inductance digital control (SPS-DCVI). The digitally controlled variable inductance used in dual active bridge (DAB) can change the inductance value by adjusting parameters. This method uses inductance value and phase shift angle as control parameters. Under the condition of zero voltage switching, an optimization equation for current stress was written. In order to avoid getting stuck in local optima during the solving process, a genetic algorithm is used to obtain the phase shift angle and variable inductance value corresponding to the minimum current stress, and dynamically achieve the optimal solution of DAB current stress within the load variation range. Finally, the effectiveness and superiority of the proposed method are verified through experiments, and the results also verify the feasibility and progressiveness of the proposed control scheme.