Title :
Sensitivity investigation of a speed sensorless induction motor drive based on stator flux vector control
Author :
Casadei, Dornenico ; Serra, Giovanni ; Tani, Angelo
Author_Institution :
Dipt. di Ingegneria Elettrica, Bologna Univ., Italy
Abstract :
A speed sensorless induction motor drive control scheme, which utilises the stator flux components as control variables, is analysed in this paper. The stator flux is estimated by a closed loop scheme using the flux reference, the stator current vector and the voltage vector as input variables. In order to examine the effects of parameter deviations on the drive performance, the equations of the whole system are linearised at a steady-state operating point. The stability of the control system is verified and the sensitivity of the control scheme, with respect to stator parameter deviations and current sensor offsets, is analysed. Numerical and experimental results are given to confirm the theoretical analysis carried out
Keywords :
closed loop systems; control system analysis; control system synthesis; induction motor drives; linearisation techniques; machine control; machine theory; parameter estimation; sensitivity analysis; stability; stators; variable speed drives; velocity control; closed loop scheme; control design; control simulation; control stability; flux reference; induction motor drive; linearised equations; parameter deviations; sensitivity investigation; speed sensorless scheme; stator current vector; stator flux vector control; stator voltage vector; steady-state operating point; Control systems; Equations; Induction motor drives; Induction motors; Input variables; Sensorless control; Stability analysis; Stators; Steady-state; Voltage;
Conference_Titel :
Power Electronics Specialists Conference, 1997. PESC '97 Record., 28th Annual IEEE
Conference_Location :
St. Louis, MO
Print_ISBN :
0-7803-3840-5
DOI :
10.1109/PESC.1997.616870
