基于分数阶Fourier变换的反电动势滤波方法  

Back-EMF Filtering Method Based on Fractional Fourier Transformation

作　　者：张淑艳[1] 王行愚[1] 姚晓东[1] 

机构地区：[1]华东理工大学信息科学与工程学院,上海200237

出　　处：《电气传动》2010年第8期31-33,共3页Electric Drive

摘　　要：无位置BLDCM控制的关键是获得准确的转子位置信息,在深入分析BLDCM反电动势信号的基础上,结合分数阶Fourier变换在时域和频域的滤波特性,提出基于分数阶Fourier变换的反电动势滤波方法,该方法可以滤除反电动势信号中的噪声,获得完全满足实际工程需要的反电动势过零点信息。实验测试结果表明,该方法可靠、稳定。The accurate rotor position is core of the sensorless brushless DC motor（BLDCM） control.In order to provide a back-electromotive force（EMF） filtering method base on fractional Fourier transformation（FrFT）,back-EMF signal was analyzed in detail.The method makes use of filtering performance of FrFT in the time and frequency domain and can filter noise and obtain the zero-cross event accurately and satisfying request of real project.It is well demonstrated from experiment that the proposed control method is provided with desirable reliability and stability.

关 键 词：反电动势滤波 无位置控制 分数阶FOURIER变换 无刷直流电机 

分 类 号：TM921[电气工程—电力电子与电力传动] TM35