摘要
文章针对传统二次型Boost变换器升压能力有限,且开关管电压应力较大等问题,在原来的拓扑基础上变换了储能电容的位置,在保留传统二次型升压变换器优点的同时,使得储能电容的电压应力大幅度降低,减小了电容的体积和寄生电阻功率损耗;引入开关电感、耦合电感升压单元,增加变换器电压增益的同时,减小了开关管电压应力,实现了以较小的占空比获得较大电压增益输出;此外,引入无源漏感吸收回路,有效抑制开关器件两端电压尖峰的同时,将漏感能量回收,提高变换器的工作效率;并详细分析了变换器的工作模态和特性。仿真结果表明,该变换器具有更高的电压增益输出,且降低了开关管和储能电容的电压应力;仿真结果验证了理论分析的正确性和可行性。
Aiming at the problems that the traditional quadratic Boost converter has limited boosting capability and large voltage stress of the switch tube,the position of the energy storage capacitor is changed on the basis of the original topology,so that the voltage stress of the energy storage capacitor is greatly reduced while the advantages of the traditional quadratic boost converter are retained,the volume of the capacitor and the parasitic resistance power loss are reduced.The switched inductor and the coupled inductor boost unit are introduced,the voltage gain of the converter is increased,the voltage stress of the switch tube is reduced,and a larger voltage gain output is achieved with a smaller duty cycle.In addition,a passive leakage inductance absorption loop is introduced to effectively suppress the voltage spike at both ends of the switching device,and the leakage inductance energy is recovered to improve the working efficiency of the converter.The working mode and characteristics of the converter are analyzed in detail.The simulation results show that the converter has higher voltage gain output and reduces the voltage stress of the switch tube and the storage capacitor,which verify the correctness and feasibility of the theoretical analysis.
作者
徐进文
王宾
石晓艳
陈忠辉
张坤
XU Jinwen;WANG Bin;SHI Xiaoyan;CHEN Zhonghui;ZHANG Kun(School of Electrical and Information Engineering, Anhui University of Science and Technology, Huainan 232001, China)
出处
《合肥工业大学学报（自然科学版）》
CAS
北大核心
2021年第3期327-331,336,共6页
Journal of Hefei University of Technology：Natural Science
基金
安徽省高等学校自然科学研究重点资助项目(KJ2018A0085)。
关键词
二次型Boost变换器
开关电感
耦合电感
高升压比
无源漏感吸收回路
quadratic Boost converter
switched inductor
coupled inductor
high step-up ratio
passive leakage inductance absorption loop
