A Single Observer for Currents Estimation in Sensor's Fault-Tolerant Control of Induction Motor Drives

Younes Azzoug (1, 2) , Remus Pusca (1) , Mohamed Sahraoui (3) , Abdelkarim Ammar (4) , Raphael Romary (1) , Antonio J Marques Cardoso (5)

1 LSEE - Laboratoire Systèmes Electrotechniques et Environnement
2 LGEB - Laboratoire de Génie Electrique [Univ. Biskra]
3 LGEB - Laboratoire de génie électrique [Université de Béjaïa]
4 IEEE - Institute of Electrical and Electronic Engineering [Boumerdès]
5 UBI - University of Beira Interior [Portugal]

This paper proposes a fault-tolerant control technique against current sensors failure in direct torque controlled induction motors drives. Several important aspects are covered in the proposed algorithm, such as the detection of sensors failure, the isolation of faulty sensors, and the reconfiguration of the control system by a correct estimation. A logic circuit ensures fault detection by analyzing the residual signal between the measured and estimated quantities, while a single modified Luenberger observer performs the task of estimating the line currents, even when all the sensors are in the faulty state. In addition, a decision logic circuit isolates the erroneous signal and simultaneously selects the appropriate estimated current signal. The proposed scheme is tested on MATLAB/Simulink environment and experimentally validated in a laboratory prototype mainly containing a dS1104 card and 4 kW induction motor.

Mots clés: fault tolerant control; fault detection; current estimation; induction motor; direct torque control; adaptive observer

Domaines: Sciences de l'ingénieur [physics]; Informatique [cs]

Younes Azzoug, Remus Pusca, Mohamed Sahraoui, Abdelkarim Ammar, Raphael Romary, et al.. A Single Observer for Currents Estimation in Sensor's Fault-Tolerant Control of Induction Motor Drives. 2019 International Conference on Applied Automation and Industrial Diagnostics (ICAAID), Sep 2019, Elazig, Turkey. pp.1-6, ⟨10.1109/ICAAID.2019.8934969⟩. ⟨hal-03276632⟩