DocumentCode :
2191979
Title :
An estimating method of instantaneous load torque by wavelet transform for the induction motor drive
Author :
Kasa, Nobuyuki ; Karino, Tomoyuki ; Watanabe, Biiroshi
Author_Institution :
Dept. of Electron. Syst. Eng., Tokyo Metropolitan Inst. of Technol., Japan
Volume :
1
fYear :
1996
fDate :
18-21 Mar 1996
Firstpage :
321
Abstract :
In a sensorless vector control system, speed estimation in the lower speed region is difficult because of various factors. For example, torque ripple has a harmful effect on speed estimation in the lower speed region. We propose an accurate speed controller for a speed sensorless vector control system in the lower speed region. The ripple of the estimated speed is extract from the estimated speed with the wavelet transform, and the ripple of torque is estimated with the disturbance observer. To compensate the ripple of torque, the estimated ripple of torque is added to the speed controller as the torque ripple current. Consequently, the sensorless vector controlled induction motor can be driven accurately in lower speed region
Keywords :
induction motor drives; machine control; observers; velocity control; wavelet transforms; accurate speed controller; disturbance observer; induction motor drive; instantaneous load torque; ripple of torque; sensorless vector control system; speed estimation; wavelet transform; Equations; Filtering; Induction motors; Machine vector control; Pulse width modulation; Rotors; Sensorless control; Time frequency analysis; Torque; Wavelet transforms;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Advanced Motion Control, 1996. AMC '96-MIE. Proceedings., 1996 4th International Workshop on
Conference_Location :
Mie
Print_ISBN :
0-7803-3219-9
Type :
conf
DOI :
10.1109/AMC.1996.509426
Filename :
509426
Link To Document :
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