Current sensors fault detection and tolerant control strategy for three-phase induction motor drives
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ORIGINAL PAPER
Current sensors fault detection and tolerant control strategy for three-phase induction motor drives Younes Azzoug1,2 · Mohamed Sahraoui1,3 Antonio J. Marques Cardoso3
· Remus Pusca2 · Tarek Ameid2 · Raphaël Romary2 ·
Received: 23 December 2019 / Accepted: 6 October 2020 © Springer-Verlag GmbH Germany, part of Springer Nature 2020
Abstract In the case of failure of one or more components of a drive system, the emergency shutdown of the system is not always the best way to act. Therefore, simultaneous reconfiguration of the drive control strategy is mandatory to enable an uninterrupted operation to cater for the catastrophic failure. In this context, this paper presents a current sensors fault-tolerant control method for induction motor drives, based on vector control and currents estimation. Several important issues are considered in the proposed method, namely, the detection of sensors failure, isolation of the faulty sensors, and reconfiguration of the control system by proper currents estimation. A new adaptation of the Luenberger observer is proposed and used to perform the task of stator currents estimation. Furthermore, a developed logic circuit is used to detect the faulty current sensors and isolate them with simultaneous generation of logic impulses allowing switching to a proper estimation. The proposed fault-tolerant control strategy is firstly tested in MATLAB/Simulink environment in order to illustrate its high-performance. Then, several experimental tests are carried out on a 1.1 kW three-phase induction motor to validate the theoretical results and to confirm the effectiveness of the proposed algorithm. Keywords Fault-tolerant control · Fault detection · Current sensor · Current estimation · Induction motor · Vector control
List of symbols V dc Vs
B
DC-link voltage Three phases stator voltages
Younes Azzoug [email protected] Mohamed Sahraoui [email protected] Remus Pusca [email protected] Tarek Ameid [email protected] Raphaël Romary [email protected] Antonio J. Marques Cardoso [email protected]
1
Electrical Engineering Laboratory of Biskra (LGEB), University of Biskra, Biskra, Algeria
2
UR 4025 LSEE, Univ. Artois, 62400 Bethune, France
3
CISE - Electromechatronic Systems Research Centre, University of Beira Interior, Covilhã, Portugal
Ia , I b , I c Vsd , Vsq Isd , Isq ϕr d , ϕrq τs , τr Vsα , Vsβ Isα , Isβ I sα , I sβ ϕr α , ϕrβ ϕ rα, ϕ rβ ϕr ωs ωr ωe Ωr Te , Tl
(a, b, c) Axis stator currents (d, q) Axis stator voltages (d, q) Axis stator currents (d, q) Axis rotor fluxes Stator and rotor time constants (α, β) Axis stator voltages (α, β) Axis stator currents (α, β) Axis estimated stator currents (α, β) Axis rotor fluxes (α, β) Axis estimated rotor fluxes Rotor flux magnitude Synchronous speed Rotor angular speed Electrical angular speed Mechanical speed Electromagnetic and load torques
1 Introduction The induction motor (IM) is the most widely used machine for several demanding applications in industry due to it
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