摘  要：针对电机直接转矩控制中传统的定子磁链纯积分器估算方法和低通滤波器估算方法的不足，该文提出了一种具有幅值限制的改进型积分器的定子磁链观测器，不仅可以避免积分饱和，而且采用这种磁链观测器的系统在高速时具有较强的抗扰性，在低速时也能较有效的抑制积分器的初始值误差和直流偏移误差,可以提高定子磁链的估算精度，从而获得较好的电机动、静态性能。
关键词：直接转矩控制；幅值限制；误差抑制；定子磁链观测器

Abstract: Aimed at shortage of pure integrator and low-pass filter method of stator flux linkage estimation in DTC,this paper presented an improved integrator flux linkage observatory with amplitude limited to provide integral saturation.Simulation shows that the system used this flux linkage observer has strong immunity in high speed,and it can inhibit initial value inaccuracy of integrator and DC shift inaccuracy,it also improves estimating precision of stator flux linkage and takes on a preferable performance of the static and dynamic state.
Key Words: Direct torque control;Amplitude limited;Inaccuracy inhibiting;Stator flux linkage observer