一种高增益耦合电感交错组合Boost-Zeta变换器

A high-gain coupled-inductor interleaved Boost-Zeta converter

为提升Boost变换器的电压增益,本文提出结合耦合电感和倍压单元的交错组合DC-DC变换器。该变换器由Boost和Zeta变换器组合并引入耦合电感倍压技术而得到,并利用无源钳位支路吸收漏感能量,开关管采用交错控制,降低了开关管的电压尖峰,实现开关管低电压应力,在无需极限占空比和高匝比的情况下可获得更高的电压增益。本文深入讨论了所提拓扑的工作原理及特点,对比了不同变换器的电气性能;对实验参数进行设计,最后通过实验对变换器的理论分析进行验证。

In order to improve the voltage gain of the Boost converter,an interleaved DC-DC converter based on a coupled inductor and a voltage doubling structure is proposed.The converter is obtained by combining Boost converter and Zeta converter and introducing coupled inductance voltage doubling technology and using passive clamping branch to absorb leakage inductance energy.The switching tube adopts interleaved control to reduce the voltage spike of the switching tube.The low voltage stress of the switch tube is realized,and a higher voltage gain can be obtained without the need of a limit duty cycle and a high turn ratio.The working principle and characteristics of the converter are discussed in depth,and the electrical performance of different converters are compared;the experimental parameters are designed,and finally the theoretical analysis is verified by building a prototype circuit.