感应电动机转子磁通观测的一种方法

摘要

In the rotor-flux-oriented vector control system of induction motors, it is very important to estimate the rotor flux precisely. Usually the size and location of magnetic link vector is calculated by the mathematical model of motor using the stator voltage and current detected. A flux method combining current model and voltage model was presented. The variable coefficient of weight makes the two methods work in the low and high speed respectively ,and transit smoothly. Simulation and experiment demonstrate that the new method has high accuracy.%转子磁场定向矢量控制系统中,转子磁链的准确估算至关重要,通常通过检测定子电压、电流并结合电机的数学模型来检测转子磁链矢量的大小和位置.文章介绍了一种电流模型和电压模型相结合的磁链观测方法,通过变系数加权,使得两种模型在低速和高速时分别起作用,且平滑过渡.仿真和实验论证该方法具有了较高的准确性.