直接转矩控制在异步电动机软起动中的应用研究.pdfVIP

摘 要 异步电动机在我国应用广泛，在我国工农业生活中占据着不可替代的地位。但异步电 动机的起动时带来的问题则在其应用之初就一直受到关注。随着现代工矿企业对自动化生 产的要求越来越高，传统的软起动控制方式显示出了它的先天性不足。而直接转矩控制作 为必威体育精装版的电动机控制理论，其在软起动中的应用也一定会有不俗的表现。 本文阐述了异步电动机的起动原理，总结了目前工矿企业生产中仍在广泛使用的控制 方法，并将直接转矩控制这种新型控制方法运用到异步电动机软起动中。搭建了电压斜坡 软起动和直接转矩控制软起动模型，通过和这种传统控制方式的比较发现，直接转矩控制 软起动不仅可以有效的抑制转矩脉动保护拖动设备，而且转矩提升迅速、转速平稳上升， 可以说在动静态性能上都要优于电压斜坡起动，这对以后发展重载软起动和大功率软起动 器也是一种启发。 在文章最后设计了基于 DSP2812 芯片的软起动控制器的硬件电路和软件流程，并对其 中的一些模块进行了测试。 关键词：软起动；直接转矩控制；Matlab 仿真；DSP2812；模糊控制 - I - Abstract As the most widely used motor in China’s industrial development, induction motor plays an important role .But the starting problems in the beginning of its application has been followed. As modern automated production of industrial and mining enterprises have become increasingly demanding, the traditional soft-start control method shows a congenital lack of it. And direct torque control of motor control has become the latest theory, its application in soft-start must also be in a good performance. This paper summarizes the methods and the traditional start of the pros and cons of the modern way of starting, and applied to direct torque control in induction motor soft starter. And build a voltage ramp soft start model and soft-start model of direct torque control by the comparison. The result shows direct torque control soft starters can not only effectively protect the drag equipment through restrain rque ripple, and the torque elevates rapidly, speed increases smartly, it can be said to be superior in static and dynamic performance than the voltage ramp start, which is better for the development of heavy and high-power soft start and it is also a source of inspiration. At