Elafia Aziz

ENSAM Casablanca Université Hassan II Casablanca · Génie Electrique

In this paper, the concept and analysis of a simple direct-torque fuzzy control (DTFC) scheme of motor induction using space vector modulation (SVM) is presented. A fuzzy logic control system is applied to obtain high performance decoupled flux and torque control. A principle and a tuning procedure of this method are discussed. The simulation resul...

The three level inverters (NPC), present a big interest in the field of the high voltages and the high powers of the fact that they introduce less distortion and weak losses with relatively low switching frequency. This paper present a direct torque control of three level inverters fed induction machine. In order to provide better torque regulation...

In order to provide a reduction of harmonic current for Dual Three-Phase Permanent Magnet Synchronous Motor (DTP-PMSM), this paper proposes a Space Vector Pulse Width Modulation (SVPWM) technique based on vector space decomposition method (VSD). By this technique, the analysis and control of the machine are accomplished in three two-dimensional or...

In this study, a performance assessment and analysis of a 1 MW three-phase photovoltaic (PV) power station connected to the electrical grid of a factory in Morocco are presented. The main objective of this research is to assess the performance of the PV power station and analyze its efficiency, energy generation, and operational characteristics. To...

With the reflection on global warming, renewable energies have become privileged areas of study. Solar is one of those energies that have recently been brought up to date. This paper aims to design a model of photovoltaic cells. Therefore, the theoretical design of the PV system has been made using Proteus software based on mathematical equations....

This paper presents simulation and experimental results of anti-windup PI controller to improve induction machine speed control based on direct torque control (DTC) strategy. Problems like rollover can arise in conventional PI controller due to saturation effect. In order to avoid such problems anti-windup PI controller is presented. This controlle...

p> The study made in this paper concerns the use of the voltage-oriented control (VOC) of three-phase pulse width modulation (PWM) rectifier with constant switching frequency. This control method, called voltage-oriented controlwith space vector modulation (VOC-SVM). The proposed control scheme has been founded on the transformation between station...

A direct torque control using a classical switching- table ST-DTC can be used to control the torque and thus the speed of Dual Three-Phase Permanent Magnet Synchronous Motor (DTP-PMSM). The principle is based on direct application of control sequence by using two hysteresis regulators and a switching table. A large stator current containing low ord...

In this paper we propose a simplified space vector modulation (SVM) control scheme for reduced switching losses in converterfed drives. This method has some practical advantages when compared to normal SVM. It is characterized by a reduction in switching losses, a lower current harmonic distortion and easier digital implementation. Our approach, wh...

In this paper a direct torque control strategy for dual three-phase permanent magnet synchronous motor (DTP-PMSM) is presented, the machine has two sets of three-phase stator windings spatially phase shifted by 30 electric degrees. In order to reduce the stator harmonic current, torque and flux are controlled based on regulators and Vector Space De...

The current paper aims at presenting and examining an implementation on a digital signal processor (DSP) of the conventional space vector pulse width modulation (CSVPWM) so as to control the dual three phase permanent magnet synchronous motors (DTP-PMSM) drives applied on electric ship propulsion. It is also an attempt to accomplish a developed con...

p> A Field Oriented Control (FOC) strategy based on a 24-Sector Vector Space Decomposition (24SVSD) technique used to control a Dual Three-Phase Permanent Magnet Synchronous Motor (DTP-PMSM) applied on electric ship propulsion prototype is presented in this paper. This machine is supplied by Dual Three-Phase Voltage Source Inverter (DTP-VSI). This...

This chapter presents the analysis and design of different control strategies of unit power factor three-phase PWM rectifier: hysteresis current control, voltage-oriented control (VOC), and direct power control (DPC), in order to obtain high-performance DC bus voltage, lower input current harmonics, and higher unit power factor (UPF). The studied c...

This study proposes the implementation of Voltage Oriented Control (VOC) for three phase PWM rectifier. The basic principles of the PWM rectifier are analyzed and then the 3-phase mathematical of the input AC voltage sensorless PWM rectifier control system is established in synchronous rotating coordinates dq. The main goal of the control system is...

Dans les applications de fortes puissances comme la propulsion navale et la traction ferroviaire, les actionneurs multi-phases sont très utilisés. La Machine Synchrone Double Etoile (MSDE) constitue la machine la plus répandue des machines multi-phases. L'inconvénient majeur du double triphasé habituel des machines à courant alternatif lorsqu'elles...

This study presents simulation and experimental results of DTC of induction machine, using an IP controller to improve induction machine speed control. The experimental results were obtained by practical implementation on a dSPACE 1104 board for a 1.5 kW induction machine. The aim of this reserach is to give an experimental performance analysis of...

This study proposes the implementation of Voltage Oriented Control (VOC) for three phase PWM rectifier. The basic principles of the PWM rectifier are analyzed and then the 3-phase mathematical of the input AC voltage sensorless PWM rectifier control system is established in synchronous rotating coordinates dq. The main goal of the control system is...

Dans les applications de fortes puissances comme la propulsion navale et la traction ferroviaire, les actionneurs multi-phases sont très utilisés. En effet, les machines à grand nombre de phases présentent plusieurs avantages par rapport aux machines conventionnelles triphasées. La Machine Synchrone Double Etoile (MSDE) constitue la machine la plu...

This paper presents a comparative study between three different controls strategies of unit power factor rectifier : hysteresis current control, voltage oriented control (VOC) and direct power control (DPC), in order to obtain high performance DC bus voltage, lower input current harmonics and higher power factor. The studied control strategies pre...

This paper proposes voltage oriented control (VOC) for three phase PWM rectifier. The basic principles of the PWM rectifier are analyzed, and then the three-phase mathematical of the input AC Voltage sensorless PWM rectifier control system is established in synchronous rotating coordinates dq. The main goal of the control system is to maintain the...

This paper presents a comparative study for two speed controllers: Proportional-Integral (PI) and Integral-Proportional (IP), used to improve statics and dynamics performances, in regulation and slavery mode, of the Field Oriented Control (FOC) strategy, applied for a Permanent Magnet Synchronous Motor (PMSM) drive with smooth pole. The computer si...

This paper presents detailed comparisons between the Direct Torque Control (DTC) and the Field Oriented Control (FOC) for Permanent Magnet Synchronous Motor (PMSM) drives. The advantages and drawbacks of the two control strategies have been evaluated in terms of torque and speed behaviors and the analysis has been carried out to illustrate the feat...

This paper presents a control strategy of an induction machine supplied by three level inverters (NPC). The induction machine with the control strategy should provide, at the constraining requests, a response with high performances in electromagnetic torque and speed. This work aims to demonstrate the contribution of fuzzy logic in the direct torqu...

In this paper we propose an approach to improve the direct power control (DPC) of three-phase PWM based on fuzzy logic technique switching table. The fuzzy DPC controller presents the advantage to be based on linguistic description, the controller ensures a good regulation of the dc-bus voltage, active and reactive power-flows of the grid connected...

This paper presents a control strategy of an induction machine supplied by three level inverters (NPC). The induction machine with the control strategy should provide, at the constraining requests, a response with high performances in electromagnetic torque and flux. This paper aims to demonstrate the contribution of fuzzy logic in the direct torqu...

This paper contains the evaluation and comparison between DPC methods for two-level (2-L) and three-level (3-L) AC/DC converters, in order to demonstrate de great advantages of using a three level rectifier type NPC. The theoretical principal of this methods as well as the synthesis of the active and reactive power are discussed. The regulation of...

this paper presents an experimental implementation of a new direct torque control strategy of induction machine called twelve sectors direct torque control strategy (12_DTC) using DSPACE TMS 320F2812.The aim of this work is to give an experimental performance analysis of 12_DTC in term of torque, simulation results obtained in previous works. curre...

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This paper presents a method for speed sensorless direct field oriented control (DFOC) of an induction motor (IM) driven by a voltage-source space vector modulation (SVM) inverter. The approach in this study is based on an extended Kalman filter (EKF), which estimates the rotor speed from only stator quantities, currents and line voltages. The esti...