Abstract：A digital direct phase shift control (DDPSC) method is presented based on phase-shifted full-bridge LLC (PSFB-LLC) converter. This paper combines the presented method with the conventional linear control to obtain a hybrid control strategy. The strategy has both the advantages of linear control and DDPSC control. It is not only easy to realize but also has quick dynamic responses. The PSFB-LLC circuit structure is simple and it works in fixed frequency mode; it can realize the ZVS of the switch tube and the ZCS of the rectifier diode in wide load range. In this paper, the PSFB-LLC converter resonator is analyzed in detail; the concrete realization scheme of the hybrid control strategy is given by analyzing the phase plane and the time domain model; a 3kW principle prototype is finally developed; the feasibility and effectiveness of DDPSC controller and hybrid strategy are verified by experimental results.
郭兵, 张一鸣, 张加林, 王旭红, 丁建智. 基于直接移相角控制的移相全桥LLC变换器混合控制策略[J]. 电工技术学报, 2018, 33(19): 4583-4593.
Guo Bing, Zhang Yiming, Zhang Jialin, Wang Xuhong, Ding Jianzhi. Hybrid Control Strategy of Phase-Shifted Full-Bridge LLC Converter Based on Digital Direct Phase-Shift Control. Transactions of China Electrotechnical Society, 2018, 33(19): 4583-4593.
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2018, Vol. 33 
