异步电动机低速直接转矩控制的建模与仿真

Modeling and Simulation of Asynchronous Moter Low-Speed Direct Torque Control

研究电动机低速转矩控制问题,针对电动机直接转矩控制低速性能响应不好的问题,影响了异步电动机在低速范围内的应用,为解决上述问题,增加异步电动机的应用范围,提出一种U-I模型的定子磁链观测和补偿的新方法,以提高低速性能。利用matlab工具箱中的电力系统模块建立了直接转矩控制系统的仿真模型,并进行了仿真。仿真结果表明对直接转矩控制系统的低速性能的改善有明显的效果,为拓展异步电动机在低速范围内的应用,提供了理论基础。

The paper studied low-speed torque control of a motor problem.Aiming at the problem that the direct torque control has poor low-speed response performance,we presented a UI-based model of the stator flux observer and compensation for the new way to improve the low-speed performance.Power system module of simulation toolbox in Matlab was used to establish a direct torque control system simulation model.The simulation results show that the direct torque control system for low-speed performance can be improved significantly.