Performance of PI stator resistance compensator on DTC of induction motor

S. Haghbin, M. Zolghadri, S. Kaboli, A. Emadi
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引用次数: 17

Abstract

Stator resistance PI compensator is one of the simplest methods proposed to estimate stator resistance. This method is based on the real time stator resistance correction regarding the variations of the stator current magnitude, which must be a constant value when the stator flux and motor torque are constant. This reference value can be calculated using the flux and torque commands and motor parameters. In this paper, it is shown that for DTC systems using digital controller with limited sampling frequency, stator current vector amplitude varies as a function of speed, sampling period, and switching strategy. Effects of sampling frequency, motor speed, and switching strategy on this current error are investigated and their effects on performance of the stator resistance PI compensator are considered.
PI定子电阻补偿器在异步电动机直接转矩控制中的性能
定子电阻PI补偿器是估计定子电阻最简单的方法之一。该方法基于对定子电流大小变化的实时修正,当定子磁链和电机转矩恒定时,定子电流大小必须为恒定值。这个参考值可以通过磁通和转矩指令以及电机参数来计算。本文表明,对于采用有限采样频率的数字控制器的DTC系统,定子电流矢量幅值随速度、采样周期和开关策略的变化而变化。研究了采样频率、电机转速和开关策略对电流误差的影响,并考虑了它们对定子电阻PI补偿器性能的影响。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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