Sensorless speed measurement of AC machines using analytic wavelet transform

Author

Aller, José M. ; Habetler, Thomas G. ; Harley, Ronald G. ; Tallam, Rangarajan M. ; Lee, Sang Bin

Author_Institution

Departamento de Conversion y Transporte de Energia, Simon Bolivar Univ., Caracas, Venezuela

Volume

38

Issue

5

fYear

2002

Firstpage

1344

Lastpage

1350

Abstract

A new method for the sensorless speed estimation of AC machines, using the analytic wavelet transform of the stator current signal, is proposed for a direct torque control drive. A comparison with results obtained using the short-time Fourier transform is included. The proposed method can be implemented in real time on a digital signal processor. The time-frequency resolution obtained and the computation time required by the proposed algorithm are improved in comparison to existing techniques, and the method can be applied over the entire speed range.

Keywords

AC machines; Fourier transforms; control system analysis; machine theory; machine vector control; time-frequency analysis; torque control; velocity control; wavelet transforms; AC machines; analytic wavelet transform; computation time; control simulation; direct torque control; sensorless speed estimation; sensorless speed measurement; short-time Fourier transform; stator current signal; time-frequency resolution; AC machines; Digital signal processors; Fourier transforms; Signal analysis; Stators; Time frequency analysis; Torque control; Velocity measurement; Wavelet analysis; Wavelet transforms;

fLanguage

English

Journal_Title

Industry Applications, IEEE Transactions on

Publisher

ieee

ISSN

0093-9994

Type

jour

DOI

10.1109/TIA.2002.802988

Filename

1035188