单开关低电压应力的高增益Boost变换器

High step-up low-voltage stress boost converter with single-switch

为了将分布式发电系统中光伏板、燃料电池等的低压直流电转换成高压直流电,提出一种带有泵升电容的基于开关电容与开关电感网络的高增益DC/DC变换器。该变换器进一步提高了电压增益,减小了功率器件的电压应力。采用磁集成技术,将两个电感绕在同一磁芯上形成耦合电感,提高了变换器的功率密度。最后,分析了该拓扑的基本工作原理,并制作了一台输入电压为30 V,输出电压为380 V,额定功率为200 W的样机,实验结果证实了理论分析的正确性。

In order to convert the low-voltage direct current of photovoltaic panels and fuel cells in distributed power generation system into high-voltage direct current,a high step-up DC/DC converter with pump-up capacitor based on switch capacitor and switch inductance network is proposed.This converter further increases the voltage gain and reduces the voltage stress of the power device.Using magnetic integration technology,two inductors are wound on the same magnetic core to form coupled inductor,which improves the power density of the converter.Finally,the basic working principle of the topology is analyzed,and a prototype with input voltage of 30 V,output voltage of 380 V and rated power of 200 W is made.The experimental results verify the correctness of the theoretical analysis.