In this paper, the effects of current measurement error inherent in all categories of AC motor drives are discussed and a compensation method is proposed. Recently, as the higher performance of torque control is required, current measurement error classified as offset error and scaling error becomes considerable. It is demonstrated that the offset error causes the torque of a motor to oscillate at the stator electrical frequency, f/sub e/, and the scaling error, at the frequency, 2 f/sub e/, respectively. These torque ripples deteriorate the performance of speed control because they act as disturbance loads. The simulation and experimental results shows that the proposed compensation method can improve the performance of torque control by eliminating torque ripples effectively.
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机译：本文讨论了所有类别的交流电动机驱动器固有的电流测量误差的影响，并提出了一种补偿方法。近来，由于需要更高的转矩控制性能，分类为偏移误差和缩放误差的电流测量误差变得相当大。已经证明，偏移误差使电动机的转矩分别在定子电频率f / sub e /处振荡，并且缩放误差在频率2 f / sub e /处发生振荡。这些转矩脉动会充当干扰负载，因此会降低速度控制的性能。仿真和实验结果表明，所提出的补偿方法可以有效消除转矩脉动，从而提高转矩控制性能。
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