单相转三相电源变换器的的设计.doc

编号 论文 题目： 物联网工程 学院专业 学 号 学生姓名 指导教师 摘要 本文介绍了一种用途广泛的单相转三相电源变换器，适用于对三相电源电压和频率有调节要求的工业场合，尤其是三相交流电动机的变压变频调速。该单相转三相电源变换器是基于DSP的数字化控制系统，文本详细介绍了其主电路设计以及采用的SPWM调压和调频的控制方法。 由于传统模拟控制的单相转三相电源变换器难以满足实时、精确、可靠调压和调频等要求，本文所研究的是一种以TMS320LF2407A的DSP作为核心控制器的数字式单相转三相电源变换器，并且采用PID控制策略来控制负载的各个变量。 本文所研究的单相转三相电源变换器，可实现了恒电流、恒电压、恒功率控制，系统所采用的PID控制方式具有很好的动态跟踪品质和稳态精度,兼顾了静态与动态特性，具有控制精度高等优点；其液晶显示内部状态等人机交互功能，具有良好的人机界面，操作简便，使整个系统更人性化；整个系统具有集调压与调频一体的功能，可以很好的实现输出频率和电压的连续调节，具有工作安全可靠，性能良好，适应性强等优点。 关键词：调压；调频；DSP；SPWM；PID ABSTRACT This paper introduces a kind of extensive use of single-phase to three-phase power converter, suitable for industry occasions that require adjustable voltage and frequency three-phase power supply, especially for three-phase AC motor with variable voltage and frequency control. The single-phase to three-phase power converter is based on a digital control system of DSP, and the paper introduces its detailed design and the main circuit of SPWM voltage and frequency control method. Traditional analog controlled single-phase to three-phase power converter is difficult to meet the real-time, accurate and reliable modulation demands. This paper studies a single-phase to three-phase power converter based on DSP TMS320LF2407A and the system uses PID control strategy to control different variables. This paper studied a single-phase to three-phase power converter, which can make a constant current, constant voltage, constant frequency control, the system using PID control mode has a good dynamic tracking quality and steady precision, and both the static and dynamic characteristics has good control and high precision; its LED can show the state and other human-computer interaction; all in all ,the system has a good human-machine interface and easy operation so that the whole system become more humane; the whole system has one set of power surge and the transfer function, which can achieve a good continuous output