一种基于锁相环原理的参考模型自适应感应电机转速估计方法

针对超低速及零定子频率运行条件下感应电动机转速的不可观测性导致基于电机模型的传统速度估计方案无法实现速度估计,引入了高频信号注入法来获得转子磁链矢量位置角并得到转子磁链的参考模型,并以转子磁链的电流模型作为调节模型,在此基础上,提出了基于锁相环原理的参考模型自适应速度估计方案．仿真结果进一步验证了该方案的有效性．

A Phase-Locked-Loop-Based Model Reference Adaptive System for Speed Estimation of Sensorless Induction Motor Drives

Since speed is not observable from the terminals of IM at ultra-low speed and zero stator frequency, the classic speed estimation techniques based on motor model cannot estimate the rotor speed. The paper introduces a high frequency signal injection method (HFSIM) which takes the rotor flux position information as reference model and the current model of rotor flux as adjustable model. Then, a model reference adaptive system (MRAS) speed estimation scheme based on the principle of phase locked loop (PLL) is presented. The simulation results have verified its effectiveness.