一种混合开关电感和开关电容的高增益DC/DC变换器

针对传统Z源DC/DC变换器存在的输入电流不连续、输出电压增益不够高和功率器件电压应力较高等不足,利用开关电感和开关电容技术,提出了一种混合开关高增益DC/DC变换器。该变换器主电路中只用到1个储能电容,结构简单,与现有典型的高增益阻抗源DC/DC变换器相比,所提出的混合开关电感和开关电容的DC/DC变换器可以实现更高的输出电压增益,同时电容和开关器件的电压应力较低。详细分析了所提变换器的工作原理,通过在实验室中所建立的输入电压16～40 V、输出电压26～107 V和输出功率7～114 W的原型验证了其性能。

High-gain DC/DC Converter with Hybrid Switched-inductor and Switched-capacitor Cell

Against the disadvantages of traditional Z-source DC/DC converters such as discontinuous input current, limited output voltage gain and high-voltage stresses over power devices, etc., a high-gain DC/DC converter with hybrid switched-inductor and switched-capacitor cell is presented. The proposed topology has the advantage of simple circuit structure since only one energy storage capacitor is adopted. Moreover, compared with the existing typical Z-source topologies, the proposed DC/DC converter can achieve not only higher output voltage gain, but also relatively lower voltage stress over the capacitor and switching devices. Based on a detailed analysis of the working principle of the proposed converter, a prototype is built, with varied ranges of input voltage, output voltage and output power from 16 to40 V, 26-107 V and 7-114 W, respectively. The experimental results are in agreement with simulations and theoretical analysis, which verify the performances of the proposed converter.