A high accuracy FFT algorithm for induction motor sensor-less speed estimation

Author

Li, Qianxiang ; Hu, Jingtao

Author_Institution

Key Lab. of Ind. Inf., Chinese Acad. of Sci., Shenyang

fYear

2008

fDate

17-20 Oct. 2008

Firstpage

851

Lastpage

854

Abstract

As the effects of power systempsilas frequency fluctuation and harmonics, errors are unavoidable when using the FFT to analyze the induction motor current signal. In order to saving the problem of frequency leakage and error of the FFT, the polynomial approximation method is employed to obtain simple formulas for frequency correction. This paper is aimed at using the frequency correction to estimate the slot harmonic frequency of induction motorpsilas stator current and realize the motor sensor-less speed estimation. By this method the disturbance of the frequency leakage and the noise can be reduced and the accuracy of the harmonic analysis can be improved. Experiment verifies the methodpsilas validity.

Keywords

fast Fourier transforms; harmonic analysis; induction motors; polynomial approximation; power systems; fast Fourier transforms; frequency correction; frequency leakage; harmonic analysis; harmonic frequency; high accuracy FFT algorithm; induction motor sensorless speed estimation; polynomial approximation method; power system frequency fluctuation; stator current; Approximation methods; Error correction; Fluctuations; Frequency estimation; Harmonic analysis; Induction motors; Polynomials; Power system analysis computing; Power system harmonics; Signal analysis;

fLanguage

English

Publisher

ieee

Conference_Titel

Electrical Machines and Systems, 2008. ICEMS 2008. International Conference on

Conference_Location

Wuhan

Print_ISBN

978-1-4244-3826-6

Electronic_ISBN

978-7-5062-9221-4

Type

conf

Filename

4770829