感应电机的带通滤波器补偿电压模型及其应用研究

Research on the Band-Pass-Filter Compensation Voltage Model of Induction Motors

对于高性能的感应电机矢量控制系统,磁链估计是首先要解决的问题。该文阐述了感应电机带通滤波器补偿电压模型的基本原理,提出了基于该模型的新型定子磁链估计算法。深入分析了带通滤波器极点位置对算法的影响,获得了极点位置与电机运行频率的限制条件。在此基础上引入了定子磁链的自适应相位控制器,增大了滤波器极点的取值范围,提高了算法的动态性能。该文提出的定子磁链估计算法在理论上可彻底解决对反电动势积分时的积分初值与直流漂移问题,在较宽的速度范围内均可获得幅值和相位较为准确的定子磁链,可用于高性能的无速度传感器感应电机矢量控制系统,具有较好的实用性。通过仿真及实验对提出的磁链估计算法进行了验证。

For high-performance vector-controlled induction motor drives, flux estimation is the primary task. The basic principle of the compensation voltage model （CVM） of induction motors based on the band pass filter （BPF） is expounded in this paper. Based on this model, a new stator flux estimation algorithm is proposed. The effect of the poles＇ location of the BPF is studied, and the restrictions on the BPF poles＇ location and the motor＇s operating frequency are discovered. An adaptive phase error regulator is introduced to expand the location ranges of the BPF poles and improve the dynamic performance of the algorithm. This new algorithm can completely solve the initial value and DC drift problems associated with the integration of the back electromotive force （Back EMF）, and produce considerable accurate estimated stator fluxes both in magnitude and phase angle over a wide speed range. It has better practicability and can be used in high-performance speed sensorless vector-controlled induction motor drives. The performance of the algorithm is verified through simulation and experiment results.