摘要
将Boost变换器与Sepic变换器进行有机结合,提出一类Boost-Sepic(BSIC)集成拓扑结构,该结构既扩展了电压增益,又降低了开关管的电压应力,同时保留了两种基本变换器输入电流连续的特点。该文首先把Boost环节与Sepic环节在输入端共用一个输入电感和一个开关,然后将Boost环节与Sepic环节的输出端进行串联,构成基本集成变换器拓扑(BSIC)。在此基础上,将耦合电感的匝比引入到集成变换器电压增益的函数中,进一步提高了变换器的电压增益,减小了开关管电压应力,有利于优化整体效率。给出了集成变换器的推演步骤,详细分析了基于耦合电感的CI-BSIC集成变换器的工作原理,讨论了电路参数对其稳态性能的影响。最后,通过一台数字式实验样机验证了理论分析的正确性和有效性。
A family of Boost-Sepic converters were derived by combining a Boost converter with a Sepic converter. The integrated topology has the advantages of raising the voltage gain, low voltage stress on the switch, and continuous input current as the basic Boost or Sepic. Firstly, the general Boost and Sepic converter shared an input inductor and a switch at the input. Secondly, the outputs of them were connected in series, so the basic Boost-Sepic integrated converter（BSIC） was derived. On this basis of BSIC, a Boost-Sepic integrated converter with the coupled inductor（CI-BSIC） was further proposed based on the voltage multiplier cell of coupled inductor. Since the turns ratio of coupled inductor was introduced into the function of voltage gain of CI-BSIC, the voltage gain of the converter was extended further, and the switching voltage stress was reduced, optimizing the whole efficiency. The operational principle of CI-BSIC was given, and the influence of circuit parameters on the steady-state characteristics was discussed in detail. Finally, a digital experimental prototype was tested in the lab to verify the correctness of the theoretical analysis.
出处
《中国电机工程学报》
EI
CSCD
北大核心
2015年第8期2018-2025,共8页
Proceedings of the CSEE
基金
安徽省教育厅自然科学重点项目(KJ2012A048)
安徽省自然科学基金项目(1408085ME80)~~
