Power

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End date: 2024Subject: search.filters.subject.Direct torque control (DTC)

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    Sizing of PV Pumping System with Optimizing MPPT Algorithm
    (Université M’Hamed Bougara de Boumerdes : Institut de génie electrique et electronique (IGEE), 2024) Benmbarek, Malik; Daif, Mouhaned; Kheldoun, Aissa (Supervisor)
    This report covers a comprehensive study of the sizing, modeling and simulation of a stand-alone solar water pumping system in El Oued, Algeria. The initial part involves selecting a farm located in Hassi Khalifa, El Oued, Algeria, which has an average water consumption of 43m/h. The irrigated site covers 1 hectare (10,000 square meters) of land. Sizing such a system has been carried out using differen ttool ssuc ha sCropwat ,Climwat ,an dPVgis. Sizing has led to the selection of a 2.2 kW submersible pump, 3.19 kW PV array, 3 kW inverter, and a 74m2 Tank of height 3 m. System dynamic modeling is done using MATLAB/Simulink which contains several models of sub-systems such as solar arrays, DC-DC boost converter, two-level inverter, Squirrel cage IM, and centrifugal pump, This dynamic modeling has been developed based on the sizing of the system. To improve further the overall system’s efficienc y,an enhanced P&O MPPT algorithm has been developed. Moreover, a DTC algorithm is used to regulate both the motor’s speed and torque. Various numerical simulations were conducted to illustrate and validate the effectivenes so fthi ssystem .MATLAB/Simulin ksimulation shows that this system can deliver the required energy needed for the farm to satisfy all the requirements.
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    Improved direct torque control of switched reluctance motor 8/6 using high order sliding mode
    (Université M’Hamed BOUGARA de Boumerdes : Institut de génie electrique et electronique (IGEE), 2023) Guediri, Hicham; Boukdira, Mohammed Amin; Ammar, Abdelkarim (Supervisor)
    This research focuses on implementing a robust direct torque control (DTC) system for a Switched Reluctance Motor (SRM) by employing nonlinear approaches such as sliding mode control, Twisting controller (TC), and Super Twisting controller (STC). The initial phase involves the modeling of the SRM and its power supply, predominantly comprising a voltage inverter. Subsequently, the DTC technique is introduced and applied to the SRM. In the subsequent phase, two distinct control strategies, namely classical DTC and sliding mode DTC for SRM, are presented and discussed. Various numerical simulations are conducted to illustrate and explicate the effectivenes so fthes econtro ltechniques .I nth efin alphase, Twisting and Super Twisting regulators are proposed with the intention of improving the chattering problem encountered in SRM control. The simulation results are subsequently presented to substantiate this assertion.
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    Enhanced direct torque control of permanent magnet synchronous motor using sliding mode control theory
    (2020) Bencheikh, Raid; Abdelkarim, Ammar (Supervisor)
    The direct torque control (DTC) was proposed as an alternative to the vector control in the middle of 1980s for AC machines control. This strategy is based on the direct determination of inverter switching states and offers a simpler scheme and less sensitivity to machine parameters. However, the variable switching frequency of DTC causes high flux and torque ripples which lead to an acoustical noise and degrade the performance of the control technique, especially at low-speed regions.
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    Direct torque control with space vector modulation of inverter fed permanent magnet synchronous motor
    (2018) Maddi, Liza; Rezki, Amazigh; Metidji, Brahim (Supervisor)
    In recent years, synchronous motors have become widely used in industrial applications. In all low speed ratings, synchronous motors are physically smaller and less costly to build than squirrel-cage induction motors of equivalent horsepower. Moreover, synchronous motors provide higher torque/inertia ratio and higher efficiency. Particularly, Permanent Magnet Synchronous Motors (PMSM) do not have windings on the rotor. So, there is no need for brushes and slip rings what leads to less copper losses, less maintenance and space saving. This thesis presents the Direct Torque Control Space Vector Modulation (DTC-SVM) of PMSM. The implementation requires a Digital Signal Processor (DSP) to handle the issue of the control of the PMSM. The DTC-SVM is one of the preferred methods for motor drives since it operates at a constant switching frequency. This method is based on the estimation of the motor torque and stator flux, comparing the signal with the two adjustable references and compensate the error signals using a PI controller. The simulation of DTC-SVM model is done using MATLAB/Simulink®. The results are presented to help analyze the system response. The modeling could also be done using fuzzy logic techniques for better results.
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    Direct torque control with space vector modulation of inverter fed permanent magnet synchronous motor
    (2018) Maddi, Liza; Rezki, Amazigh; Metidji, Brahim (Supervisor)
    In recent years, synchronous motors have become widely used in industrial applications. In all low speed ratings, synchronous motors are physically smaller and less costly to build than squirrel-cage induction motors of equivalent horsepower. Moreover, synchronous motors provide higher torque/inertia ratio and higher efficiency. Particularly, Permanent Magnet Synchronous Motors (PMSM) do not have windings on the rotor. So, there is no need for brushes and slip rings what leads to less copper losses, less maintenance and space saving. This thesis presents the Direct Torque Control Space Vector Modulation (DTC-SVM) of PMSM. The implementation