基于新型纯积分法的定子磁链在线辨识算法

Research on Online Identification Algorithm of Stator Flux Based on New Pure Integral Method

针对气隙转矩法计算异步电机转矩时对定子磁链辨识精度的要求,提出了一种基于新型纯积分法的定子磁链在线辨识算法,采用了精度较高的复化辛普森积分模型。相比传统的梯形积分法,基于新型纯积方法的定子磁链在线辨识算法的磁链辨识精度显著提高;相比新型的基于低通滤波器的定子磁链观测器,该算法模型更简单,操作更便捷。通过MATLAB/Simulink搭建系统仿真平台进行验证,结果表明基于新型纯积分算法消除了传统积分法的主要缺陷,解决了积分饱和问题以及初值问题。基于新型纯积分算法的估计磁链与理论参考磁链基本吻合,表明其可靠性较高。

In order to fulfill the requirement of stator flux identification accuracy in the calculation of air-gap torque,puts forward a stator flux online identification algorithm based on a new pure integral method,which used mulriple simpson integral model.Compared with the traditional trapezoidal integral method,this model improved the identification precision of the stator flux;while compared with the new stator flux observer based on low-pass filter,it was more simple and easy to operate and implement.Through MATLAB/Simulink platform,a simulation system was built.The results showed that the algorithm eliminate the major drawbacks of traditional integration method and solve the integral saturation and initial value problems.The stator flux estimated used the new algorithm essentially coincident with the theoretical results,showed the higher reliability of the algorithm.