Title :
Performance analysis of a speed sensorless induction motor drive based on a constant switching frequency DTC scheme
Author :
Casadei, D. ; Serra, G. ; Tani, A. ; Zarri, L. ; Profumo, F.
Author_Institution :
Dipt. di Ingegneria Elettrica, Bologna Univ., Italy
Abstract :
A control technique which utilizes the stator flux components as control variables has been applied to a speed sensorless induction motor drive. The scheme may be regarded as a development of a DTC scheme, aimed to achieve a constant switching frequency operation. At each sampling period, the required voltage vector is calculated on the basis of the error between the reference and the estimated stator flux vector. The problems related to the VSI dead time and the stator flux estimation at low speed have been analyzed, and an efficient solution has been proposed. The performance of the drive system has been verified by experimental tests, and good results have been achieved in both steady state and transient operating conditions
Keywords :
control system analysis; induction motor drives; machine testing; machine theory; machine vector control; observers; stators; switching; torque control; velocity control; VSI dead time; constant switching frequency DTC scheme; control performance; control simulation; control variables; direct torque control; performance analysis; sampling period; speed sensorless induction motor drive; stator flux components; stator flux vector; steady state operation; transient operation; voltage vector; Equations; Induction motor drives; Machine vector control; Performance analysis; Pulse width modulation; Sensorless control; Stators; Switching frequency; Torque control; Voltage;
Conference_Titel :
Industry Applications Conference, 2000. Conference Record of the 2000 IEEE
Conference_Location :
Rome
Print_ISBN :
0-7803-6401-5
DOI :
10.1109/IAS.2000.882062
