低速范围内的异步电动机直接转矩控制方法探究

异步电动机直接转矩控制技术有运算量小、控制系统结构简单、动态性能好等突出优点,也存在低速性能较差,稳态时转矩的脉动大的主要缺点。本课题浅要分析减小异步电动机直接转矩控制系统转矩脉动的方法,包括直接转矩无差拍控制、使用PI调节器的直接转矩控制(PI-DTC)以及改进的开关表法等。

The direct torque control technology of asynchronous motor has many outstanding advantages,such as small amount of calculation,simple control system structure,good dynamic performance and so on.It also has the main disadvantages of poor performance at a low speed and large torque ripple in steady state.The purpose of this paper is to analyze the methods to reduce the torque ripple of asynchronous motor direct torque control system,including direct torque deadbeat control,direct torque control using PI regulator(PI-DTC),improved switch meter method and so on.