基于电流测量误差补偿的感应电机参数辨识

Parameter Identification of Induction Motor Based on Current Measurement Error Compensation

首先分析了磁链、转矩性能受电机参数影响的关系,然后研究了一种基于瞬时无功功率的模型参考自适应(MRAS)转子电阻辨识方案。在分析电流测量误差影响参数辨识精度的基础上,设计一种基于谐振观测器的电流误差补偿方案,提高了转子电阻在不同情况下的在线跟踪精度。最后,设计了Matlab仿真与样机实验,转子电阻的动、静态辨识精度可靠,为感应电机控制性能的提高提供了保障。

Firstly,the relationship between flux and torque performance influenced by motor parameters is analyzed, and then a model reference adaptive system(MRAS)rotor resistance identification scheme based on instantaneous reactive power is studied.Based on the analysis of the effect of current measurement error on parameter identification accuracy,a current error compensation scheme based on resonant observer is designed to improve the online tracking accuracy of rotor resistance under different conditions.Finally,the Matlab simulation and prototype experiment are designed.The dynamic and static identification of rotor resistance accuracy is reliable,which provides a guarantee for the improvement of the control performance of the induction motor.