Title :
Real time implementation of a rotor time-constant online estimation scheme
Author :
Ba-Razzouk, A. ; Chériti, A. ; Rajagopalan, V.
Author_Institution :
Ind. Res. Chair, Univ. du Quebec a Trois-Rivieres, Que., Canada
Abstract :
Implementation of AC drives insensitive to parameter variation is a challenge which interests many researchers in the field of high performance drives. In the case of drives controlled by the indirect rotor flux orientated control method (IRFOC), the rotor time-constant (τr=Rr/Lr) exerts a dominant role in the loss of dynamic performances and its variation results in creation of an undesirable coupling between flux and torque of the machine. This paper presents a new scheme for online estimation of this parameter using measurements of motor accessible variables (voltages, currents and speed). This scheme is tested by simulation in the MATLAB/SIMULINK environment and also real-time implemented on a TMS320C31 digital signal processor. Both simulation and experimental results are presented
Keywords :
AC motor drives; control system analysis computing; control system synthesis; electric machine analysis computing; machine control; machine theory; parameter estimation; robust control; AC motor drives; MATLAB/SIMULINK environment; TMS320C31 digital signal processor; computer simulation; dynamic performance; parameter variation insensitivity; rotor time-constant online estimation scheme; Couplings; Current measurement; Frequency; Induction motors; Regulators; Rotors; Stators; Torque control; Velocity measurement; Voltage;
Conference_Titel :
Industrial Electronics Society, 1999. IECON '99 Proceedings. The 25th Annual Conference of the IEEE
Conference_Location :
San Jose, CA
Print_ISBN :
0-7803-5735-3
DOI :
10.1109/IECON.1999.816536
