基于直接移相角控制的移相全桥LLC变换器混合控制策略

doi:10.19595/j.cnki.1000-6753.tces.171413

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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.

Key words： LLC full-bridge converter state-plane analysis dynamic performance soft switching

Received: 12 October 2017 Published: 15 October 2018

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TM46

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	Guo Bing
	Zhang Yiming
	Zhang Jialin
	Wang Xuhong
	Ding Jianzhi

Cite this article:

Guo Bing,Zhang Yiming,Zhang Jialin等. Hybrid Control Strategy of Phase-Shifted Full-Bridge LLC Converter Based on Digital Direct Phase-Shift Control[J]. Transactions of China Electrotechnical Society, 2018, 33(19): 4583-4593.

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https://dgjsxb.ces-transaction.com/EN/10.19595/j.cnki.1000-6753.tces.171413 OR https://dgjsxb.ces-transaction.com/EN/Y2018/V33/I19/4583

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