基于模糊PID控制的开关电源并联供电系统设计

摘要

在建立了并联开关电源变换器模型的基础上,分析并联均流的原理及方法,用模糊参数自整定PID控制方法设计了一种有效的控制器,能够合理地处理好精度和速度的矛盾。基于此方法,设计了一种以dsPIC单片机为控制核心的并联供电系统,利用dsPIC单片机的高速运算能力,完成全数字双闭环控制。实验结果表明,系统负载均流性能较好,响应速度快。%In this paper,based on the parallel switching power converter model and the analysis of both parallel flow theory and method,an effective controller is design by using the fuzzy parameter self-tuning PID control,which can reasonably control its accuracy and speed.Based on this method,parallel power supply system is designed based on a dsPIC microcontroller,which uses the high-speed computing power of dsPIC MCU to complete the all-digital dual-loop control.Experimental results show that has the features of better system load-sharing performance and fast response.