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This paper presents three current control strategies for a switched reluctance machine (SRM). Two classical controllers are recall : the hysteresis and the proportional - integral controller. Dynamic and current ripples with both controllers are compared and discussed. Then, a new current controller qualified as “hybrid controller” is proposed. It is a combination of the two previous structures. The...
The role of proportional-integral (PI) controller as a speed controller for a induction Motor (IM) in high performance drive system is still vital although new control techniques such as direct torque control that is more effective -but complex- is available. However, PI controller is slow in adapting to speed changes, load disturbances and parameters variations without continuous tuning of its gains...
This paper presents a control method that reduces the pulsating torque and dc voltage problems of a Doubly Fed Induction Generator (DFIG)-based wind turbine system. To reduce the torque and the power ripple, a current control scheme, consisting of a proportional integral (PI) controller, is presented in a positive synchronously rotating reference frame and is capable of providing a precise current...
In this paper, a hybrid speed controller based on proportional integral (PI) controller and artificial neural network(ANN) is proposed as a speed controller for an indirect field oriented induction motor vector control system. The new controller has self-learning and self-organization capabilities. Its parameters are adjusted online according to back propagation (BP) algorithm. The weighting coefficients...
This paper compares two indirect field oriented control approaches of speed sensorless MRAS schemes. The first scheme is a feedback linearization control of an induction motor including proportional integral compensation. The second is a modify feedback linearization scheme, where the current control is composed only by proportional integral controllers. Experimental analyses of the feedback linearization...
Studies the torque control of dual induction motors drive for tracked vehicle. Induction motor mathematics model is made up, a torque voltage PI (Proportional Integral) controller of induction motor is designed, torque control strategy based on rotor flux oriented is proposed, and dual induction motors independent drive system for tracked vehicle is constructed, whose of complex torque control strategy...
This paper presents the analysis and operation of doubly fed induction generator (DFIG)-based wind power generation system under unbalanced network voltage conditions. The limited voltage and current ratings, the control capabilities of both the grid-side and the rotor-side converter (GSC & RSC) for unbalanced network voltage compensation are investigated in detail. A new current control scheme,...
This paper presents a method for improving the speed control of 3-phase induction motors (IM) using hybrid direct torque controller (DTC)/fuzzy logic controller (FLC) techniques. A complete simulation of the conventional DTC and closed-loop for speed control of a 3-phase IM was tested using SimuLink. The speed control of the IM is done by using the conventional proportional integral (PI) controller...
This paper investigates new form of a hybrid model reference adaptive speed control (HMRASC) for vector controlled permanent magnet synchronous motor (PMSM) drive. In the proposed scheme, a direct fuzzy logic controller (FLC) is employed as the main controller, and model reference based proportional integral (PI) controller as the adaptation controller. The design and optimization of the FLC and the...
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