Implementation of a DSP based real-time estimator of induction motors rotor time constant

Author

Ba-Razzouk, Abdellfattah ; Chériti, Ahmed ; Sicard, Pierre

Author_Institution

Chaire de Recherche Hydro-Quebec sur la Puissance et l´´Energie Electrique, Quebec Univ., Trois-Rivieres, Que., Canada

Volume

17

Issue

4

fYear

2002

fDate

7/1/2002 12:00:00 AM

Firstpage

534

Lastpage

542

Abstract

Implementation of ac drives insensitive to parameter variations is an important need in the field of high performance drives. For drives controlled by the indirect rotor flux oriented control method (IRFOC), the rotor time constant (τ_r = L_r/R_r) exerts a dominant role in the loss of dynamic performance and its variation results in an undesirable coupling between flux and torque of the machine. This paper presents a new scheme for on-line estimation of rotor time constant using dq representation of the model in the stationary reference frame and measurements of accessible motor variables only (voltages, currents and speed). The estimator is tested by simulation in the MATLAB/SIMULINK environment and validated experimentally on a 1/4 hp squirrel cage motor and a 1/4 hp wound rotor motor with implementation on a TMS320C31 digital signal processor

Keywords

adaptive control; digital signal processing chips; induction motor drives; machine vector control; magnetic flux; magnetic variables control; parameter estimation; rotors; DSP based real-time estimator; TMS320C31 digital signal processor; adaptive control; currents measurement; dynamic performance loss; high performance drives; indirect rotor flux oriented control method; induction motors rotor time constant; machine flux; machine torque; on-line estimation; rotor time constant; rotor time constant estimation; speed measurement; squirrel cage motor; stationary reference frame; voltages measurement; Couplings; Current measurement; Digital signal processing; Mathematical model; Performance loss; Rotors; Time measurement; Torque control; Velocity measurement; Voltage;

fLanguage

English

Journal_Title

Power Electronics, IEEE Transactions on

Publisher

ieee

ISSN

0885-8993

Type

jour

DOI

10.1109/TPEL.2002.800963

Filename

1016802