基于最优负载瞬态特性的单相全桥逆变器解耦设计

摘要

Aiming at the problem that the design process for the single-phase full-bridge low frequency inverter is lack of specification,this paper presents a formulation process decoupling method for designing the main circuit filter parameters and the controller parameters in the condition of desired dynamic transients.Based on the resistive load step,the optimal load transient response processes for the single-phase full-bridge low frequency inverter were analyzed in two extreme cases,this paper derived the mathematical formula of the optimal load transient characteristics about filter parameters,and gives an applicable scope of the formula-output voltage undershoot below 10%,and then based on the desired dynamic transients of inverter,a design method of filter parameter is proposed,and take the example of sliding mode control,the design method of sliding mode controller is given.The simulation experiment results show that the optimal load transient response process is existent,and verify the correctness and effectiveness of optimal load transient characteristic expression and the decoupling design method.This decoupling design method has good theoretical and engineering value.%针对单相全桥工频逆变器设计过程欠缺规范的问题,该文提出了一种以动态设计指标为条件解耦设计主电路滤波参数和控制器参数的公式化分步设计法.以阻性负载跃变量为条件,分析了单相全桥工频逆变器在两种极端情况下的最优负载瞬态响应过程,推导了最优负载瞬态特性关于滤波参数的数学表达式,并给出了表达式适用范围-输出电压跌落量低于10%,且结合逆变器的动态设计指标提出了一种滤波器参数设计方法,再以滑模控制为例,结合动态设计指标给出了一种滑模控制器设计方法.仿真实验结果验证了最优负载瞬态响应过程的存在性,最优负载瞬态特性表达式的正确性和有效性,也验证了解耦设计法的正确性和有效性.该解耦设计法具有良好的理论价值和工程价值.