控制受限滑模控制工频全桥逆变器分析  

Study of Constraint SMC Low-Frequency Full-Bridge Inverter

作　　者：倪雨[1] 沈艳[1] NI Yu;SHEN Yan(College of Automatic Control Engineering,Chengdu University of Information Technology,Chengdu,Sichuan 610225,China)

机构地区：[1]成都信息工程大学控制工程学院,四川成都610225

出　　处：《电子学报》2018年第11期2809-2816,共8页Acta Electronica Sinica

基　　金：国家自然科学基金(No.61472050);四川省科技支撑计划(No.2015GZ0204);四川省应用基础研究计划(No.2014JY0257);四川省教育厅科技项目(No.15ZA0187)

摘　　要：该文针对滑模控制单相全桥工频逆变器滑模系数选取困难的问题,基于滑模控制理论建立了单相全桥逆变系统的相变量模型,根据控制受限思想和滑动模态存在条件推导了滑模域与负载电阻和滑模系数之间的数学关系,深入分析了滑模域边界与滑模系数、负载电阻和负载跃变幅度的关系,提出了选取滑模系数的基本原则.基于逆变器加载系统轨线,结合滑模域右边界条件和逆变器期望动态设计指标,给出了一个计算滑模系数的公式,随后给出了切换系数的选取方法,并总结了基于滞环调制的滑模控制器的设计方法.仿真试验采用该方法设计了滑模控制器,结果验证了该设计方法的正确性和有效性.此法操作简便且易于掌握,具有较好理论参考价值和工程推广价值.To solve the problem that it is difficult to select the sliding coefficient,the sliding mode control theory was used toestablish the phase-variable model of the single-phase full-bridge inverter with sliding mode control.According to the constraint control principleand the sliding-mode’s existence conditions themathematical relationship among the sliding domain,sliding coefficient and load resistance are derived.Then,the papermade ananalysis of the relationship between the sliding domain boundary and sliding coefficient,load resistance,load step amplitude,and put forward the basic principle of choosing the sliding coefficient.Based on the inverter load-step system trajectories,combined the sliding domain right boundary conditions with the inverter desired dynamic,the design method for the sliding mode controller with the hysteresis modulation is proposed.In the simulation experiment the sliding mode controller wasdesigned by this method,the results show that the design method is correct and effective.This method is simple and easy to operate,and is a good theoretical reference value and engineering value.

关 键 词：相变量模型 滑模控制 滑模域 滑模系数 逆变器 

分 类 号：TM46[电气工程—电器]