基于d轴电流直接求解的异步电动机定子磁场定向控制

在异步电动机磁场定向控制系统中,准确的磁场定向是实现高性能控制的前提。在对异步电动机定子磁场定向控制进行了较深入的分析后,提出了一种基于解析计算的定子磁场定向控制的改进方法,给出了计算d轴电流分量的解析计算式。根据该方法,在磁链的控制通道中,没有任何的积分调节器,d轴电流是通过解析式的方法直接计算得到的,克服了常规定子磁场定向控制须加解耦器及其带来的定子磁链输出延时的缺点。实验结果表明:这种方法具有控制性能不受电机转子参数的影响,以及快速的磁链和转矩响应的特点。

Stator Flux Oriented Control for Induction Motor Drives Based on Direct Solution of d-axis Current

The accurate knowledge acquisition of flux position is required to ensure good performance in induction motor drives.A optimized algorithm for stator flux oriented control with direct solution of d-axis current is proposed by detail analysis of induction motor flux oriented control,and the dynamic mathematical model of induction motor drives is simplified,the simplified analytic expression of d-axis current is presented,d-axis current can be solved directly by this analytic expression in the flux linkage channel without integral regulator.The conventional stator flux oriented control which must work with decouple regulator,and is influenced by time-delay of decouple regulator,but the improved stator flux oriented control doesn't so.Experimental results show that behaviors of the improved stator flux control aren't influenced by rotor parameters,and rapid responses of stator flux and electrical torque are achieved.