Title :
Performance characteristics of speed-sensorless vector control of parallel connected induction motor drive
Author :
Gunabalan, R. ; Subbiah, V.
Author_Institution :
Dept. of EEE, Chandy Coll. of Eng., Thoothukudi, India
Abstract :
This paper presents the speed characteristics of a sensorless vector control of two induction motors of same rating connected in parallel and fed by a single inverter. Speed and rotor fluxes of both drives are estimated by natural observer. The speed difference between two induction motors is reduced under unbalanced load conditions by employing additional PI controllers in the speed control loop even though mean value of rotor fluxes and stator currents are considered. The mean value of rotor flux is maintained constant by rotor flux feedback control. Simulation results are presented under unbalanced load conditions to prove the effectiveness of the given method.
Keywords :
PI control; angular velocity control; induction motor drives; machine vector control; observers; rotors; sensorless machine control; PI controllers; inverter; natural observer; parallel connected induction motor drive; rotor flux feedback control; rotor flux mean value; speed flux; speed-sensorless vector control loop; unbalanced load conditions; Educational institutions; Induction motor drives; Inverters; Machine vector control; Rotors; Torque; Estimator; Sensorless vector control; natural observer;
Conference_Titel :
Energy Efficient Technologies for Sustainability (ICEETS), 2013 International Conference on
Conference_Location :
Nagercoil
Print_ISBN :
978-1-4673-6149-1
DOI :
10.1109/ICEETS.2013.6533483
