双极性模式PWM逆变电路

电力电子系统计算机仿真 题目：双极性模式 PWM 逆变电路 班级： 姓名： 学号： 指导老师： 日期： 1 摘 要 PWM 控制就是对脉冲的宽度进行调制的技术。即通过对一系列脉冲的宽度进行调制，来等效地获得所需要的波形。PWM 控制技术在逆变电路中的应用最为广泛，现在大量应用的逆变电路中绝大部分都是PWM 型逆变电路。 本设计为双极性 PWM 方式下的单相全桥逆变电路，主要包括双极性 SPWM 控制信号的发生电路和带反并联二极管的IGBT 作为开关器件的单相全桥电路。设计的重点在于运用 MATLAB 中的SIMULINK 建立电路模型，对电路进行仿真，并对仿真结果进行分析，得出系统参数对输出的影响规律。 关键字：双极性 PWM 控制 逆变电路 SIMULINK 仿真 2 目录 一、主电路工作原理 ··························································3 1.1 PWM 控制技术及 SPWM 波的生成···········································3 1.1.1 PWM 控制的基本原理······················································3 1.1.2 SPWM 法的基本原理··················································· 4 1.1.3 规则采样法························································· 4 1.2 单极性和双极性 PWM 控制逆变电路分析····································· 5 1.2.1 单极性 PWM 控制方式················································· 6 1.2.2 双极性 PWM 控制方式················································· 6 二、MATLAB 仿真及结论分析···················································· 7 2.1 建立仿真模型··························································· 7 2.1.1 双极性 SPWM 控制信号的仿...