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Author: search.filters.author.Ammar, AbdelkarimSubject: search.filters.subject.Direct torque control

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    Open-Switches fault diagnosis and fault tolerant direct torque control of voltage source inverter fed induction motor
    (Springer Nature, 2024) Boubou, Fouad Eddine; Nedjai, Abd Elouahed; Ammar, Abdelkarim
    Fault diagnosis and fault tolerance are considered essential features in critical industrial applications in order to maintain the necessary levels of availability and dependability. The components that are most frequently affected by failures in closed-loop controlled power converters are semiconductors and sensors. This work focuses on fault tolerant direct torque control (DTC) of induction motor drive systems under inverter open-switch failure. This system detects and isolates the fault, and then ensures the system’s operation under the new conditions. The solution was accomplished using a new reduced switch converter. This system modifies the DTC switching table using available stator voltage vectors in two-phase mode with a Four Switch Three Phase Inverter (FSTPI) topology to maintain the performance of the motor as in the Six Switch Three Phase Inverter (SSTPI) mode. The effectiveness of the fault detection method and fault tolerant control algorithm have been investigated using MATLAB/Simulink software.
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    Developing and implementing the performance of induction motors used in well pumping systems
    (2022) Belaroussi, Oussama; Terki, Amel; Ammar, Abdelkarim; Fedorovich, Kalinin Vyaslav
    Because water extraction from wells accounts for the bulk of energy consumption in irrigation operations globally, the sustainability and profitability of irrigation are strongly reliant on the energy efficiency of the pumping system. A technique that studies and improves the performance of motors used in well pumping systems is reported in this body of research as having been undertaken. In a similar manner, an experimental investigation of the energy efficiency of two modern systems of induction motor control has been carried out. According to the results, proper control performance is critical to achieving improvements in energy and efficiency. Using DTC-SVM for IM, the purpose of this study is to demonstrate a prototype of a pumping system that is powered by solar energy in the presence of changing radiation levels. Real-time MATLAB/Simulink simulations are used in conjunction with a dSpace 1104 board to carry out the hardware implementation
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    Efficiency improvement of robust-direct torque control for an induction motor drive
    (IEEE, 2019) Ammar, Abdelkarim; Ameid, Tarek; Azzoug, Younes; Kheldoun, Aissa
    This paper presents a design of a robust optimized direct torque control for induction machine drive. Since the classical method that uses linear controllers is weak during the presence of uncertainties, the control scheme can be improved by the association of a robust control approach. The sliding mode approach is proposed is inserted to achieve a decoupled control and improve its robustness versus different disturbances. Over and above, an optima control algorithm based on losses minimization is coupled with the main control scheme for efficiency optimization. This technique consists on the generation of an appropriate flux reference according to the applied load value to have an efficient control, especially for light loads and variable load applications. The effectiveness of the proposed control technique is investigated by different tests using MATLAB/Simulink simulation
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    Implementation of Sliding Mode Based-Direct Flux and Torque Control for Induction Motor Drive with Efficiency Optimization
    (IEEE, 2019) Ammar, Abdelkarim; AMEID, Tarek; AZZOUG, Younes; Kheldoun, Aissa; METIDJI, Brahim
    This paper presents an implementation of an efficient direct flux and torque control for induction motor drive. In control design, the modeling inaccuracy and various uncertainties cannot be avoided when classical methods are conducted. Therefore, it is recommended apply the nonlinear-robust control approaches to cover these drawbacks. The sliding mode approach is proposed to achieve a decoupled control and improve its robustness versus different disturbances. Furthermore, an optimal control algorithm is joined for losses minimization and efficiency maximization. This technique consists of the computation of optimum flux reference according to the load value and improves the efficiency for no load or light loads state, that makes is very suitable for variable load applications. The effectiveness of the control techniques is verified using an experimental test bench based on dSpace 1104 real-time interface