适用于航天领域的高效叠加式升压变换器

叠加式升压变换器（SBC）的部分功率不通过开关电路，而通过叠加支路直接供给负载，因此可实现较高的效率，适用于航天场合。为了避免输入输出电流断续，采用的变压器为双边磁化的隔离脉冲单元，它与电感、输出滤波电容以及叠加支路共同组成SBC变换器。根据电感位置的不同，分别提出了SBC-Ⅰ、SBC-Ⅱ和SBC-Ⅲ的基本结构与生成规则。基于生成规则推衍出9种SBC变换器，并从电流特性、输入输出电压关系、主电路传递函数、变压器的磁偏问题以及效率的角度对这9种变换器进行分析比较。最后选择一种性能最优的变换器，通过600 W的实验样机验证理论分析结果。

High Efficiency Stacked Boost Converter in Aerospace Applications

Most of the power of a stacked boost converter (SBC) is transferred to the load directly rather than passing through a MOSFET; that is why an SBC with high efficiency is suitable for aerospace applications. In order to avoid input or output current discontinuity, a bilateral magnetized transformer is employed. The SBC is composed of a pulsating cell, an inductor, an output capacitor and a stacked branch. The structure and generation rules of three kinds of SBCs are proposed, which are named SBC-Ⅰ, SBC-Ⅱ and SBC-Ⅲ respectively. Nine topologies generated according to the generation rules are compared in terms of current characteristics, transfer function, DC magnetic bias and efficiency. In addition, experimental results by a 600 W prototype are given to verify the validity of the theoretical analysis.