## MATLAB变频器中PWM整流电路的分析研究

Analysis and research of the PWM rectifying circuit in the converter
Abstract: In this paper, the application of PWM rectifier circuit for Variable-frequency Drive is studied.. The main contents are as: According to the general rectification circuit of the general Variable-frequency Drive, the disadvantages of PWM rectifier are presented. The main circuit and control system of the three-phase bridge PWM rectifier are designed.. The control system design is based on the direct current control system.. The inner loop of the current loop and the voltage outer loop of the control system are designed, and the appropriate parameters are simulated to verify the parameters obtained.. The Simulink simulation model of direct current control system is established, and simulation analysis is carried out.The results of the simulation experiment prove that the parameters and design are reasonable and the system can run
Keywords: Variable-frequency Drive；PWM,；VSR；MATLAB,；PWM rectifier

1    绪论    1

1.1    PWM整流器的概述    1
1.2    PWM整流器的研究    2
1.2.1 关于PWM整流器主电路拓扑结构的研究    2
1.2.2 关于电压型PWM整流器的电流控制策略研究    2
1.2.3 PWM整流器的建模研究    2
1.2.4 关于电流型PWM整流器的研究    3
1.3 PWM整流技术    3
1.4本课题的研究意义和要解决的问题    4
1.4.1课题的研究意义    4
1.4.2课题研究的主要内容    4
2    PWM整流    5
2.1    变频器的构成    5
2.2    变频器中各种整流方式    6
2.3    PWM整流电路的构成    6
2.4    PWM整流电路原理    8
2.5    PWM的形成    10
2.5.1 调制法    10
2.5.2计算法    12
2.6 PWM整流器的控制技术    13
3    三相桥式PWM整流器    14
3.1 三相桥式PWM整流器的结构    14
3.2三相桥式PWM整流器的一般函数模型    14
4    三相桥式PWM整流器主电路设计与建模    17
4.1矢量坐标的转换    17
4.1.1 三相静止坐标系和两相静止坐标系的转换    17
4.2.2 两相静止坐标系和两相旋转坐标系的变换    19
4.2三相VSR DQ模型的建立    19
5   三相桥式PWM整流电路的控制系统设计    22
5.1电流内环控制系统的设计    22

5.2 电压外环控制系统的设计    24