Title :
Sensorless speed measurement of AC machines using analytic wavelet transform
Author :
Aller, J.M. ; Habetler, T.G. ; Harley, R.G. ; Tallam, R.M. ; Lee, S.B.
Author_Institution :
Dept. de Conversion y Transp. de Energia, Univ. Simon Bolivar, Caracas, Venezuela
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 DSP. 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; control system synthesis; machine testing; machine vector control; parameter estimation; time-frequency analysis; torque control; velocity control; wavelet transforms; AC machines; analytic wavelet transform; computation time; control design; control performance; direct torque control; sensorless speed estimation; sensorless speed measurement; stator current signal; time-frequency resolution; AC machines; Digital signal processing; Fourier transforms; Signal analysis; Stators; Time frequency analysis; Torque control; Velocity measurement; Wavelet analysis; Wavelet transforms;
Conference_Titel :
Applied Power Electronics Conference and Exposition, 2001. APEC 2001. Sixteenth Annual IEEE
Conference_Location :
Anaheim, CA
Print_ISBN :
0-7803-6618-2
DOI :
10.1109/APEC.2001.911624
