Title :
Sensorless vector control of induction motors using Zero-Crossing Times signal of stator currents
Author :
Askari, M.R. ; Keivani, H. ; Kavehnia, F. ; Ghanbarian, M.M.
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; angular velocity control; fast Fourier transforms; induction motors; machine vector control; power filters; FFT; ZCT signal; fast Fourier transformation; induction motors; rotor speed; sensorless vector control; stator currents; switchable high order Butterworth Filters; zero-crossing times signal; Induction motors; Machine vector control; Stators; Induction Motor; Sensorless Vector Control; Speed Esyimation; Zero Crossing Time;
Conference_Titel :
Universities Power Engineering Conference, 2007. UPEC 2007. 42nd International
Conference_Location :
Brighton
Print_ISBN :
978-1-905593-36-1
Electronic_ISBN :
978-1-905593-34-7
DOI :
10.1109/UPEC.2007.4469106
