基于Matlab的三相桥式SPWM逆变器建模与仿真

对三相桥式逆变电路原理及其SPWM控制原理进行简单的分析,针对开环SPWM电压的不稳定提出一种电压闭环SPWM控制模型。在Matlab/Simulink软件环境中分别建立了三相SPWM逆变器开环仿真模型和具有电压调节作用的SPWM闭环仿真模型,分别对其进行仿真分析。仿真结果表明电压闭环SPWM控制比开环SPWM控制具有更好的动静态特性。得出的结论对三相桥式逆变器的原理的理解、参数的确定、电路的设计有一定的参考价值和指导意义。

Modeling and simulation of three phase full bridge SPWM inverter based on Matlab

This paper analyzed simply three phase full bridge active inverter principle and the SPWM control theory, to overcome disadvantages of open loop control, a voltage close loop control model is proposed. The three-phase SPWM inverter open loop simulation model and the SPWM voltage close loop control simulation model with the voltage regulating function has been established respectivly in Matlab /Simulink software environment,each of them was analyzed through the simulation. The simulation results show that the voltage close loop control has better dynamic and static characters. the conclusion has some reference value and guiding significance to understand the principle of threephase bridge inverter,the determ, ination of parameters,The design of the circuit.