基于离散域采样数据模型的DC/DC变换器等效电路  

Equivalent Circuit of DC/DC Converter Based on Sampled-data Model in Discrete Time Domain

作　　者：童安平 杭丽君 李国杰[1] 马肖男 TONG Anping;HANG Lijun;LI Guojie;MA Xiaonan(School of Electronic Information and Electrical Engineering,Shanghai Jiao Tong University,Shanghai 200240,China;School of Automation,Hangzhou Dianzi University,Hangzhou 310018,China)

机构地区：[1]上海交通大学电子信息与电气工程学院,上海200240 [2]杭州电子科技大学自动化学院,杭州310018

出　　处：《电源学报》2020年第2期145-151,共7页Journal of Power Supply

基　　金：国家自然科学基金资助项目(51777049);国网江苏省电力有限公司科技发展资助项目(J2017075)。

摘　　要：提出了一种针对数字控制变换器的大信号模型精确建模方法。通过深入分析在不同调制方式下变换器的采样数据模型,提出了基于离散域采样数据模型的等效电路推导方法;同时,给出了等效性判别准则,该准则可用于判别所建立模型的精确性。以采用不同调制方式的同步Boost变换器作为研究算例,通过分析所得采样等效电路模型,成功解释了不同调制方式下变换器稳定性不同的根源,所得理论分析结果和仿真结果保持一致。In this paper, a rigorous modeling method is proposed to develop accurate large-signal models of digitally controlled power converters. By analyzing the sampled-data models of the converter with different modulators in depth, a derivation method for an equivalent circuit is put forward based on the sampled-data model in discrete domain. In addi tion, the equivalent criterions are given, which can be used to determine the consistency of the novel model. The syn chronous Boost converters with different modulators are taken as examples, and the stability difference caused by different modulation systems can be explained by the proposed model, indicating that the theoretical results agree well with the simulation results.

关 键 词：采样数据模型 等效电路 同步Boost变换器 调制方式 稳定性 

分 类 号：TM401.1[电气工程—电器]