A Piecewise Control Strategy for a Bidirectional Series Resonant Converter

Electronics

Sheng-Zhi Zhou¹  Guo Chen¹  Xiaodong Li¹  Song Hu² 

[1] Faculty of Information Technology, Macau University of Science and Technology, Macau 999078, China;School of Electric and Automatic Engineering, Changshu Institute of Technology, Changshu 215500, China;

关键词: resonant converter;    phase-shift control;    DC-DC converter;   

DOI  :  10.3390/electronics7120374

来源: DOAJ

【 摘 要 】

An energy storage system (ESS) plays an important part in a renewable energy generation system for stable and efficient power harvesting. To realize the function of an ESS, a bidirectional DC/DC converter with high power density and high efficiency is highly desired. In this paper, a high-frequency (HF) isolated dual-bridge series resonant converter (DBSRC) with a piecewise control strategy is proposed for an application with a wide variation of voltage gain. The proposed control strategy is based on dual-phase-shift modulation for a balance between complexity and flexibility. With this proposed control strategy, zero-voltage switching is kept for all switches on the low-voltage side and half of switches on the high-voltage side. Besides, there is no circulation energy on the low-voltage high-current side for full load operation. A step-by-step design procedure is also included to calculate the converter components and control parameters. Verification of the analysis and design are performed successfully through simulation and n experimental test. Comparisons with some existing control methods are also made experimentally, which highlights that the proposed control strategy is able to achieve comparable performance as the reported optimal current control with simpler calculation and implementation.

【 授权许可】

Unknown