Digital Control algorithm for Two-Stage DC-DC Converters
Digital Control algorithm for Two-Stage DC-DC Converters
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DOI：
10.1016/j.egypro.2012.01.044
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发表时间：
2012
期刊：
影响因子：
--
通讯作者：
Changhao Piao;Hongtao Qiao;Cong Teng
中科院分区：
文献类型：
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作者：
Changhao Piao;Hongtao Qiao;Cong Teng
针对两级dc-dc变换器，提出了一种系统的数字控制方法，并给出了设计过程。由于无功元件数量众多，拓扑结构的动态响应非常复杂。稳态分析是为了验证两级变流器的工作进度。并建立了小信号模型来分析拓扑结构的瞬态响应。然后设计了一个数字控制器作为滞后补偿器对系统进行补偿。交叉频率比无补偿变换器高，二次谐振频率提高，系统调整稳定，整定时间减小，超调量减小。实验结果说明了数字控制器的设计过程和良好的稳态和瞬态响应特性。
A systematic digital control method is proposed for the two-stage dc-dc converter, and the design procedure is demonstrated. As the high number of reactive components, the dynamic response of the topology is very complex. The analysis of the steady-state is to verify the work progress of the two-stage converter. And small signal model is got to analyze the transient response of the topology. Then a digital controller which is a lag compensator is designed to compensate the system. The crossover frequency becomes higher than the uncompensated converter, and the second resonant frequency is improved, that the system is adjust to be stable with its setting time and overshoot had be decreased. Experimental results are presented to illustrate the design procedure and the goodness features in steady state and transient response of the digital controller.