Buck变换器的非线性现象及并联同步均流研究

Study on Nonlinear Phenomenon of Buck Converter and the Parallel Synchronous Current Sharing

通过建立Buck变换器的混沌动力学离散模型,研究其丰富的非线性现象。并提出利用混沌同步特性,可以控制多个并联模块的输出特性保持一致,达到输出电流分配均匀。本文设计出一种新的便于电路实现的滑模控制方式,使并联变换器的输出电流达到同步来实现均流,便于从策略推向实用,在工程上易于实现.

In this paper, through the establishment of buck converter in the chaotic dynamics of discrete model, its various nonlinear phenomena were studied. And using chaotic synchronization characteristics, a plu- rality of parallel module output characteristics can be controlled to remain the same, making the output current distribution uniform. Application of sliding mode variable structure control method to the system, the parallel output current of converter can achieve synchronization in current sharing, from strategy to facilitate practical, and be used in engineering.