Linear parameter varying sensorless torque control for singularly perturbed induction motor with torque and flux observers

In this paper, a new approach being different from the concept of DTC and IFOC for a robust torque control design for induction motor is addressed. The design is based on the framework of singularly perturbed system theory and linear varying parameter systems. In these systems, the rotor flux is con...

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Bibliographic Details
Published in:Electrical engineering 2021-02, Vol.103 (1), p.505-518
Main Authors: Khamari, Dalila, Benlaloui, Idriss, Ouchen, Sabir, Makouf, Abdesslem, Chrifi Alaoui, Larbi
Format: Article
Language:English
Subjects:
Economics and Management
Electrical Engineering
Electrical Machines and Networks
Energy Policy
Engineering
Engineering Sciences
Flux
Induction motors
Original Paper
Parameters
Power Electronics
Robust control
Rotors
System theory
Systems theory
Torque
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Summary:In this paper, a new approach being different from the concept of DTC and IFOC for a robust torque control design for induction motor is addressed. The design is based on the framework of singularly perturbed system theory and linear varying parameter systems. In these systems, the rotor flux is considered to be a time-varying parameter in order to guarantee a robust torque control with LPV flux observer with respect to the speed and resistance variations. In fact, this observer is designed to estimate the rotor flux as well as an MRAS observer is introduced to estimate the mechanical speed and rotor resistance. The main feature of this proposed structure is the enhancement of robustness with flux, speed and rotor resistance variation. This improvement leads to a considerable decrease of the torque ripples and ensures the stability for the entire operating range. The obtained simulations and experimental results are used to validate the effectiveness of the proposed control strategy.
ISSN:0948-7921
1432-0487
DOI:10.1007/s00202-020-01095-3