本科毕业论文基于matlab的变频器的仿真研究.docx

PAGE \* ROMAN \* MERGEFORMAT III 摘 要 目前国际形势纷乱复杂、能源危机日益突出，能源瓶颈已经逐渐成为了制约国民经济持续发展的主要因素之一，迫切需要提高工农业生产中的能源利用率。而随着电力电子技术、计算机技术、自动控制技术的迅速发展，交流变频调速技术得到了迅速发展，其显著的节能效益，高精确的调速精度，宽泛的调速范围，完善的保护功能，以及易于实现的自动通信功能，得到了广大用户的认可。在运行的安全可靠、安装使用、维修维护等方面，也给使用者带来了极大的便利。因此，研究交—直—交变频调速系统的基本工作原理和作用特性意义十分重大。 本文根据变频器的基本工作原理和工作特性，设计了一种电压源型交-直-交变频器。主要内容如下: （1）设计变频器的工作原理系统框图，选择用到的元件并确定其参数 （2）通过MATLAB/SIMULINK搭建交—直—交变频调速系统的仿真模型 （3）进行仿真，得到仿真波形 仿真结果表明所设计系统的控制效果是比较理想的，仿真实验证明该系统运行良好，设计切实可行。 关键词：变频器； 异步电机； MATLAB仿真； 交流调速 The simulation and research of the frequency converter based on MATLAB Abstract As the current international situation is complex and confusing, energy crisis is becoming more and more serious, the energy bottleneck has gradually become the one of the main factors restricting the national economy sustainable development, there is a urgent need to enhance the utilization rate of the energy in the production of industry and agriculture. Along with the rapid development of power electronic technology, computer technology, automatic control technology, AC variable frequency speed control technology has been rapidly developed, its significant energy efficiency, high precise speed control precision, wide speed range, perfect protection function, and easy to achieve communication function has been recognized by the vast numbers of users. It also bring great convenience to the users in the safe and reliable installation, using, maintenance and repair operation. According to the basic principle and characteristics of the converter, this paper designed a voltage source type AC-DC-AC converter. The main contents are as follows: (1) Design the working principle diagram of the converter system, choose the elements which need and determine the parameters. (2) Use the MATLAB/SIMULINK to build an AC-DC-AC speed control system. (3) Running the simulation and get the simulation waveform. The simulation results show that the system control effect is ideal, the simulation experiments prove t