Speed sensorless AC drive fed by three-level inverter with full-dimensional spiral vector control for improved low-speed performance

IAS '96. Conference Record of the 1996 IEEE Industry Applications Conference Thirty-First IAS Annual Meeting Pub Date : 1996-10-06 DOI:10.1109/IAS.1996.557023

Jie Zhang

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引用次数: 1

Abstract

In low speed control of a speed-sensorless induction motor drive, machine stator resistance variation is commonly attributed to the deterioration in motor flux and speed estimation. Further analysis shows that the estimated value of field orientation angle is corrupted by accumulative errors from the integration of motor terminal variables which have low signal/noise ratio. An error loop-effect speeds up the degradation process. Control information starvation takes place in conventional sensorless control systems which control the machine spiral vectors in reduced dimension in this situation. A novel control scheme is developed to improve the control of motor current, torque and speed. The scheme employs full dimensional vector control approach and is less sensitive to the combined effect of the error sources and loop effect in the frequency range of interest. Preliminary experimental tests demonstrate promising results which are achievable even below 0.5 Hz.

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无速度传感器交流驱动采用三电平逆变器全维螺旋矢量控制，提高了低速性能

在无速度传感器异步电机驱动的低速控制中，电机定子电阻的变化通常归因于电机磁链和速度估计的恶化。进一步分析表明，由于低信噪比的电机端变量的积分所产生的累积误差会影响磁场取向角的估计值。误差环效应加速了退化过程。在这种情况下，传统的无传感器控制系统以降维方式控制机床螺旋矢量，从而导致控制信息匮乏。为了提高对电机电流、转矩和转速的控制，提出了一种新的控制方案。该方案采用全维矢量控制方法，在目标频率范围内对误差源和环路效应的综合影响不太敏感。初步的实验测试表明，即使在0.5 Hz以下也能取得令人满意的结果。

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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IAS '96. Conference Record of the 1996 IEEE Industry Applications Conference Thirty-First IAS Annual Meeting

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