新型高增益耦合电感组合Sepic变换器

为提高Sepic变换器的电压增益,将Sepic变换器与二极管-电容倍压单元进行组合,同时引入耦合电感结构,提出一种新型高增益耦合电感组合Sepic变换器.该变换器在提升电压增益的同时,保留了Sepic变换器输入电流连续的特点,利用Sepic结构中的二极管-电容支路作为无源箝位吸收回路,吸收漏感能量,降低开关管的电压应力...

Novel High-gain Coupled Inductor Combination Sepic Converter

To improve the voltage gain of a Sepic converter, the converter is combined with a diode-capacitor multiplier unit. At the same time, the structure of a coupled inductor is introduced, and a novel kind of high-gain coupled inductor combination Sepic converter is proposed, which retains the characteristics of continuous input current while improving the voltage gain. Meanwhile, the diode-capacitor branch in the Sepic structure is used as a passive clamping absorption circuit to absorb the leakage inductance energy, thus reducing the voltage stress of the switching tube. The working principle of the converter is analyzed, its performance parameters are deduced, its performance is compared with those of other high-gain Sepic converters, and the application expansion of the combination idea to other basic converters is also given. Finally, a 150 W experimental prototype was built on the laboratory platform to verify the theoretical analysis.