In this paper, we propose a vector control of a doubly fed induction generator (DFIG) for variable speed wind power generation. The model is developed based on the dual powered generator for the control of the active and reactive powers. Several studies are carried out to test their operation under different wind conditions. The results have shown good performances of the wind energy converter system operate under wind variations with indirect vector control strategies.

This article presents the foundations of maintenance and its different types, the level of intervention, the safety of work and devices of the wind systems, and also the types of risks that can occur during the control by blades orientation. The system under consideration is based on a wound rotor asynchronous machine excited through the rotor by means of a bidirectional converter. Control is ensured by the integration of PI. From this study, recommendations are made and simulation results are presented and discussed

In this paper, an adaptive tracking controller for a piezo-actuated stage is designed considering the LUGRE model. The adaptation algorithm of the parameterized hysteretic function is used to achieve a displacement-tracking objective under the mechanical parameters uncertainties. The Lyapunov theory is used to derive an adaptive law for the system stability. The effectiveness of the proposed controller is validated considering real-time simulation. The validation results of the proposed controller presents good performances and robustness under an external load-disturbance and parameter uncertainties.

The coupled finite element method - finite volume method are applied to solve magnetohydrodynamic (MHD) flow equations and the thermal equation in the linear induction MHD pump taking into account the saturation of the ferromagnetic materials. This study is done using the stream-vorticity formulation. The purpose of this paper is to represent the velocity and the temperature respectively in linear and non linear cases because it is required to have the knowledge of the flow and the temperature to design an MHD pump. Additionally, the effect of the electromagnetic thrust on the flow distribution in a linear induction MHD pump is studied.