移相全桥变换器的极点配置及自适应预测控制

Pole-placement and Adaptive Digital Control of Phase Shift Bridge Converter Using Prediction Technique

首先提出了移相全桥ZVSDC/DC变换器一种新的模型———准线性模型,并在此基础上运用带预测环节的极点配置自适应控制设计其数字控制系统,然后在两种测试系统动态响应的条件下,对采用预测环节的极点配置自适应数字控制的移相全桥变换器应用Matlab进行仿真,并与无预测环节的控制情况做了比较。结果表明采用新提出的控制策略不仅补偿了数字控制的时延,保证了上述变换器在各种变化的工作点获得良好的动态响应和稳定性,而且具有控制算法简单和控制过程易于实现的优点。

This paper described the general ideals of quasilinear modeling and poleplacement and adaptive digital control for fullbridge ZVS DC/DC converter using prediction technique. The simulation for poleplacement and adaptive control of ZVS fullbridge DC/DC converter using prediction technique with environmental changes have been finished in order to prove the feasibility of the proposed control strategies, the simulation results show that applying the proposed approach to control the converter above is not only able to compensate time delay and improve its dynamical responses and stabilities greatly for all varying operating points, but also has the attractive advantages of simplicity in control algorithm and ease in implementation of control processes.