一种改进的异步电机无速度传感器的直接转矩控制系统

摘要

This paper presents an improved flux MRAS-based identification method and applied to direct torque control system, can greatly improve system performance in the large speed range. Paper uses the fuzzy speed controller instead of the traditional PI speed controller to reduce the PI parameters of the dependence on the system parameters to improve the performance of the whole control system. Simulation results show that the proposed method achieved good control effect.%提出了一种改进的磁链辨识方法并应用于基于MRAS的直接转矩控制系统中,可在很大的转速范围内改善系统性能.用模糊速度调节器代替传统PI速度调节器,降低了PI参数对系统参数变化的依赖性,提高了整个控制系统的性能.仿真结果表明,提出的方法取得了良好的控制效果.