交错并联磁集成DC/DC变换器控制算法的研究

Research on Control Algorithm of Interleaved Parallel Magnetic Integrated DC/DC Converter

为提高开关变换器的建模精度、优化系统控制器的设计,进而改善四相交错并联DC/DC变换器的性能。在基于Buck工作模式下,利用能量守恒和状态空间平均法设计出了以四相交错并联Buck变换器为研究对象的小信号模型,推导了变换器的传递函数。用Ziegler-Nichols(ZN)方法得到比例积分(PI)控制器的值,通过Matlab仿真和实验,得出了该方法下的输出响应。该方法优化了控制器的补偿网络,提升了系统的稳定性和动态性能。

In order to improve the modeling accuracy and optimize the design of the controller, the performance of four interleaved parallel DC/DC converter is improved.Based on the Buck operating mode ,the small signal model of the four phase interleaved parallel Buck converter is designed by means of energy conservation and state space averaging method.The proportional integral （P I） controller is obtained by using Ziegler-Nichols （ZN） method and then through the Maflab simulation and experiment, the conclusion of the response is obtained, the method optimizes the compensation network controller, the system stability and dynamic performance has been improved.