Type-Ⅲ数字补偿器在双Buck逆变器中的实现  

The implementation of Type-Ⅲ digital compensator indual-Buck inverter

作　　者：林镇煌 毛行奎[1] Lin Zhenhuang;Mao Xingkui(College of Electrical Engineering and Automation,Fuzhou University,Fuzhou 350116)

机构地区：[1]福州大学电气工程与自动化学院,福州350116

出　　处：《电气技术》2019年第2期7-11,共5页Electrical Engineering

摘　　要：开关电源环路设计、补偿与参数整定一直是研究的焦点,本文所研究的典型双Buck逆变器是由2个Buck电路组成的。首先分析电流连续控制模式(CCM)下考虑寄生参数的单Buck电路系统模型,通过分析波特图采用经典的PI控制器无法降低系统静态误差和提高动态响应能力;然后设计了基于零极点补偿的Type-Ⅲ数字补偿器,在MathCad软件下搭建数学模型进行理论分析,并使用双线性变换法实现数字化转换;最后制作实验样机验证控制模型及环路补偿参数的合理性。结果表明,CCM下考虑寄生参数的双Buck逆变器采用所建立的Type-Ⅲ补偿器,具有良好的抗负载扰动性能。Switching power supply loop design, compensation and parameter tuning have alwaysbeen difficult research points. A typical double Buck inverter is composed of two Buck circuits. Thispaper first analyzes the single Buck circuit system model considering the parasitic parameters undercontinuous current control mode(CCM). The use of classical PI controller through the Bode plotanalysis can not reduce the system static error and improve the dynamic response capability. A Type-Ⅲ digital compensator based on zero-pole compensation is designed, and a bilinear transform method isused to realize digital conversion. The mathematic model was set up under MathCad software fortheoretical analysis, and the rationality of the experimental prototype validation control model and loopcompensation parameters was made. The results show that the double Buck inverter considering theparasitic parameters under CCM adopts the established Type-Ⅲ compensator and has good anti-loaddisturbance performance.

关 键 词：Type-Ⅲ补偿器 环路设计 零极点补偿 

分 类 号：TM464[电气工程—电器]