基于短时傅里叶变换的感应电机无传感器转速测量

2008 International Symposium on Power Electronics, Electrical Drives, Automation and Motion Pub Date : 2008-06-11 DOI:10.1109/SPEEDHAM.2008.4581114

C. Wang, Z. Zhou, P. Unsworth, T. O'Farrell

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引用次数: 7

摘要

提出了利用短时傅里叶变换(STFT)实现感应电机无传感器转速测量的方法。通过探索电流空间矢量在空间矢量平面上的位置，得到定子电流的空间矢量角波动，从而获得感应电机无传感器速度信息。通过对空间矢量角波动信号进行STFT处理，可以提取与偏心相关的电机转速信息。为了提高STFT的精度，采用了插值技术。该方法已在ABB 2极鼠笼型异步电动机的实验室起动情况下进行了验证;在估计速度和实际测量速度之间取得了很好的一致性。

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Sensorless speed measurement of induction machines using Short Time Fourier Transformation

Sensorless speed measurement of induction machines using short time Fourier transformation (STFT) is presented in this paper. The sensorless speed information of induction motors was derived from space vector angular fluctuation which is obtained from stator current by exploring the position of the current space vector in the space vector plane. By applying STFT to the space vector angular fluctuation signals, the eccentricity associated motor speed information can be extracted. Interpolation technique has been used to improve the accuracy of the STFT. The method has been verified on an ABB 2-pole squirrel-cage induction motor in laboratory in the case of motor starting; very good agreement has been achieved between the estimated speed and the actually measured speed.

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2008 International Symposium on Power Electronics, Electrical Drives, Automation and Motion

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