Zeta converter modeling analysis based on pulse waveform integral approach

摘要

The circuit topology of a Zeta converter is very complicated , which made it difficult to use the conventional modeling approaches for its common modeling. In this paper, the pulse waveform integral approach is utilized to model and analyze the Zeta converter, then the unified circuit topology can be obtained, and in accordance with this unified circuit, the small-signal dynamic mathematical model has been established. Modeling results show that the mathematical model of control variables to the output voltage contains two zeros in the right half of the plane, and the system is a non-minimum phase system. This paper has analyzed the unified modeling theory by using the conventional modeling approaches for its common modeling in detail, and the unified modeling approach then has been given. The modeling and analysis process has a clear physical concept, and its course is simple, which contributes to an effective tool for unified modeling of high-order switching converters. Finally, the simulation results have been verified the validity of the modeling consequences which is based on the pulse waveform integral approach.