基于脉冲波形积分法的三电平变换器的统一建模

针对三电平DC-DC变换器开关数目多，开关模态复杂，难以用传统建模方法对之进行统一建模，用脉冲波形积分法对三电平DC-DC变换器进行建模分析，得到了有效的统一模型．文中以Buck三电平DC-DC变换器为例，详细阐明了统一建模原理，并给出了三电平DC-DC变换器的统一建模方法．仿真分析与实验验证了理论分析的结果，表明基于脉冲波形积分法对三电平DC-DC变换器进行统一建模是行之有效的．

Unified Modeling of Three-level Converters Based on Pulse Waveform Integral Approach

The three-level DC-DC converter is known to have t oo many power switch es and complex ope~ration modes, and it is difficult to obtain a unified model b y using conventional modeling approaches. In view of such disadvantages, a novel unified modeling approach, the pulse waveform integral approach, was used for th e first time to analyze the converter. With the unified modeling of Buck three-l evel DC-DC converter as an example, the modeling principle was investigated in d etail. Also the unified modeling of other three-level DC-DC converters can be de duced. The simulation analysis and experiment results indicate that the pulse wa veform integral approach to the unified modeling of three-level DC-DC converters is both effective and efficient.