Title :
Rotor Speed Estimation Using Zero-Crossing Times Signal of Stator Current
Author :
Ghanbarian, M.M. ; Mohammadi, A. ; Kavehnia, F. ; Keivani, H. ; Askari, M.R. ; Mohammadi, S.
Author_Institution :
Islamic Azad Univ., Kazeroun
Abstract :
The purpose of this study is to illustrate a new method for sensorless vector control of induction motors. This approach uses Zero-Crossing Times (ZCT) signal of stator current to estimate rotor speed. ZCT signal contains useful information which can be used for estimation of rotor speed and resistance. We have used this information for online estimation of rotor speed. To avoid time consuming fast Fourier transformation (FFT) analysis of ZCT signal, we have used switchable high order Butterworth Filters in order to extract rotor frequency. Simulation result has expressed good performance of this simple and inexpensive sensorless vector control of induction motors.
Keywords :
Butterworth filters; fast Fourier transforms; induction motors; machine vector control; Butterworth Filters; fast Fourier transformation analysis; induction motors; rotor frequency; rotor speed estimation; sensorless vector control; stator current; zero-crossing times signal; AC motors; DC motors; Equations; Induction motor drives; Induction motors; Machine vector control; Observers; Rotors; Stators; Torque control; Induction Motor; Sensorless Vector Control; Speed Estimation; Zero-Crossing Time;
Conference_Titel :
Control Conference, 2007. CCC 2007. Chinese
Conference_Location :
Hunan
Print_ISBN :
978-7-81124-055-9
Electronic_ISBN :
978-7-900719-22-5
DOI :
10.1109/CHICC.2006.4346877
