基于二极管-电容倍压单元的DC-DC升压变换器

文章基于二极管-电容倍压单元，提出了一种新型高增益升压变换器。该拓扑在实现高增益的同时可以避免使用极大的占空比，并且有效地降低开关管和二极管的电压应力。分析了变换器的工作原理，推导了变换器工作在连续状态（CCM）和断续状态（DCM）下的电压增益、开关器件的电压应力和电感电流纹波。CCM状态下与传统的Boost变换器相比电压增益是其（5-D）倍，电感电流纹波近似减小为原来的一半。最后通过仿真与样机实验验证了理论分析的正确性，表明提出的变换器具有良好的综合性能。

DC-DC Boost Converter Based on Diode-capacitor Doubler Unit

Based on diode-capacitor doubler unit, a new type of high-gain boost converter is proposed. The topology can achieve high gains while avoiding the use of extremely large duty cycles and effectively reduce the voltage stress on the switches and diodes. The working principle of the converter is analyzed, and the voltage gain of the converter in the continuous state (CCM) and discontinuous state (DCM), the voltage stress of the switching device and the inductor current ripple are deduced. Compared with the traditional Boost converter, the voltage gain is (5-D) times that of the CCM, and the inductor current ripple is approximately reduced to half. Finally, the correctness of the theoretical analysis is verified by simulation and prototype experiments, which shows that the proposed converter has good comprehensive performance.