【摘要】 本文介绍了异步电动机直接转矩控制的基本原理,提出了基于自适应全阶磁链观测器的速度估算方法,实现了无速度传感器的速度辨识。并应用Matlab/Simulink软件对该系统进行了建模和仿真,仿真结果表明,该系统对电机定子磁链的观测精度高,转速估算准确,尤其在低速下能保持很高的性能。更多还原

【Abstract】 This paper introduces the basic principle of direct torque control system for asynchronous motor, gives a method of speed estimate based on adaptive full-step flux observer and realized the speed identification under the condition of speed sensorless. the simulation model of this system based on Matlab/Simulink is developed, Simulation result show that this method gives satisfied estimation of stator flux and rotor speed,especially in lower speed range.更多还原