双极性模式PWM逆变电路.pdf

电力电子系统计算机仿真

题目：双极性模式 PWM 逆变电路

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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

关键字：双极性 PWM 控制 逆变电路 SIMULINK 仿真

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目录

一、主电路工作原理 ··························································3

1.1 PWM 控制技术与 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

三、PSIM 仿真与结论分析······················································20

3.1 建立仿真模型···························································20

3.2 仿真结果与分析·························································21

四、总结与体会·······························································26

五、参考文献·································································27

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一、主电路工作原理

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，对逆变电路的影响也最为深刻，PWM 控制技术

输出响应波形基本相同且如图 1.1.1(2)（b）所示。

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