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首页> 外文期刊>Electric power systems research >Denoising using wavelets on electric drive applications
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Denoising using wavelets on electric drive applications

机译:在电驱动应用中使用小波消噪

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摘要

One common problem in drives applications is the presence of noise that corrupts the useful information in measurements such as of current, due to sensor imperfections. Digital low pass filters are a solution to the problem but they cannot cope when the useful information has time varying high frequency characteristics. In this paper, wavelet analysis, seldom used as yet in electric drives, is analysed and compared to classical methods. The key points of wavelet analysis are presented in a way that is appropriate for drives. Application of this new method to a typical practical current signal demonstrates the advantages and limitations of these methods over more conventional techniques. The true power of the wavelet transform is revealed when it is applied to a speed estimation problem where the rotor speed of a permanent magnet machine is modulated and coupled with high frequency components.
机译:驱动器应用中的一个常见问题是由于传感器的不完善,噪声的存在会破坏测量中的有用信息,例如电流。数字低通滤波器是解决该问题的方法,但是当有用信息具有随时间变化的高频特性时,它们将无法应对。在本文中,对小波分析(在电气驱动中很少使用)进行了分析,并将其与经典方法进行了比较。小波分析的关键点以适合驱动器的方式呈现。将该新方法应用于典型的实际电流信号证明了这些方法相对于常规技术的优势和局限性。当将小波变换应用于调速问题时,即揭示了该小波变换的真正功效,在该问题中,永磁电机的转子速度被调制并与高频分量耦合。

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