基于单片机的PWM整流器论文.docx

三相电压型PWM整流器及其控制策略研究  摘要 PWM整流器技术在近几十年发展已经趋于成熟，随着半导体器件的发展，PWM整流器从最早的晶闸管等一些半控器件演变到现在的全控型器件如MOSFET、IGBT，拓扑结构从最原始的简单单相电路也发展到如今的三相PWM整流电路；功率从千瓦级别发展到了兆瓦级别。除此之外，在PWM整流器上还应用一些软开关结构，随着开关电源的高频化，软开关使得开关损耗大大减小。 本文首先对相关脉宽的整流器的基本原理进行了了解和熟悉，然后根据本文所需要的相关三相电的调制对电桥的相关数学模型进行了搭建，然后对系统中三项ABC坐标系的dq坐标系进行了一定的比那好，然后对整个电流反馈以及耦合控制的系统框图给出了相应解释和绘制。采用双反馈的形式，分别使用电压外环和电流内环进行输出电压的控制，对控制器的PI参数进行优化调控，结合理论和分析在simulink仿真软件中搭建整个电路的架构，验证理论分析的可行性。 根据理论仿真的结构，从而编制相对应的程序，使用数字信号处理器TMS320F2812为核心的处理器来控制功率主电路的运行，得出实际的系统运行效果，最后本文对文中所做的进行总结，并分析其优缺点和提出一些未来研究性的方向。 关键词：三相电压型PWM整流器 数学模型 DSP Matlab  Abstract The development of PWM rectifier technology has become mature in recent decades. With the development of semiconductor devices, PWM rectifiers have evolved from the earliest thyristors and other semi-controlled devices to the current fully-controlled devices such as MOSFETs and IGBTs. The topological structure has changed from the original The simple single-phase circuit developed to todays three-phase PWM rectifier circuit; the power has developed from the kilowatt level to the megawatt level. In addition, some soft-switching structures are also applied to the PWM rectifier. With the high frequency of the switching power supply, the soft-switching greatly reduces the switching loss. This article first understands and is familiar with the basic principles of the relevant pulse width rectifier, and then builds the relevant mathematical model of the bridge according to the relevant three-phase electric modulation required in this article, and then analyzes the three-term ABC coordinate system in the system. The dq coordinate system is better than that to a certain extent, and then the system block diagram of the entire current feedback and coupling control is explained and drawn accordingly. In the form of double feedback, the voltage outer loop and the current inner loop are used to control the output voltage respectively, and the PI parameters of the controller are optimized and adjusted. Combined with theory