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This paper proposes a new intelligent control for an indirect vector controlled induction motor drive for high performance, based on a finite element controller map. The traditional basic conventional algorithm (PI controller) has been successfully used to obtain decoupling control between the rotor flux and the torque. The basic PI has fixed gains that cannot be increased beyond certain limits. In...
This paper introduces an innovative sensorless model predictive current control (MPCC) technique for an induction motor (IM) drive. The proposed technique handles the state of the inverter as a discrete control variable in contrast to the classic vector control in which the discrete model of the inverter is not considered. An effective formulation of cost function is used, in which there is no need...
This paper presents a new slip compensation method for the traditional scalar control (V/f) of induction motors. Based on the level of q-axis component of stator current, the steady-state slip of motor speed is estimated by means of flux-oriented current tracking that is usually applied in vector control. The method features both the simplicity of scalar control and improvement on the performance...
This paper deals with sensorless vector control of induction motor (IM) based on model reference adaptive system (MRAS) theory and sliding mode technique. An adaptive-gain supertwisting (ASTW) sliding mode speed controller is designed to provide good speed tracking performance in the presence of load torque variation. A stator current and rotor flux sliding mode observer (SMO) is designed, which is...
In this paper, a new approach for achieving speed control of induction motor and three phase inverter output balanced currents under unbalanced grid voltage condition are presented. The proposed method is based on vector control of induction motor by using field oriented control. In unbalanced grid voltage condition, negative sequence components appear on the grid voltage vector, leading to distorted...
The influence of excitation frequency on energy performances of double inverter-fed induction motor in steady-state at orthogonal flux vector control is considered in the paper. Mathematical models of energy-efficient control and analytical models of main energy performances are presented.
Multilevel inverters are an alternative for a wide range of low voltage electrical drives. They reduce power semiconductor losses, voltage transients at the motor windings, harmonic losses in the cables and common mode disturbance currents. In the low voltage range (<1000 V) new wide-bandgap semiconductors (SiC, GaN) have the potential to reduce the conduction and switching losses in multilevel...
This paper deals with issues created by the cogging torque exhibited in permanent magnet synchronous motors in a motor drive with field oriented control. Experimental results are shown for both the start-up procedure and the steady-state operation of the used motor. The static and cogging torque are also measured at low speed to optimize the parameters of the start-up algorithm.
This article presents the new results of the investigation of the characteristics of vector-controlled induction motor (IM) drives with the torque maximization at field weakening. Analytical expressions that are necessary for the optimal algorithm of field weakening have been derived. The systematic numerical studies of the dependence of relative torque increase (RTI) index on the stator current limit...
Multi phase Induction machines are very popular because of their attractive applications and advantages in the industrial applications, electric ship propulsion and traction etc. In this paper made to Modelling and analyse the model parameters of a different high phase induction motor. Fault analysis of a machine, when the fault is occur on the stator winding of a induction machine how the parameters...
This paper presents a control strategy allowing energy efficiency improvement, in high power drive system based on a multiphase motor. In fact, the main objective of the control strategy is to minimize the magnetizing energy, by setting the magnetic state of the motor, according to the drive operating point. So, the current circulating through the motor windings can be reduced, and this leads to Joule...
Vector control of induction motor is preferred as it gives independent control of flux and torque. For vector control knowledge of flux and speed is required. To eliminate the sensors, observers are used to estimate the flux and speed rather than measuring it. Sliding mode approach is popular due to its robust nature and very suitable for nonlinear system. This paper designs a sliding mode observers...
In recent years, the speed-sensorless vector control of asynchronous motor has become a research focus in modern alternating current machine control. In order to further improve the performance of the speed-sensorless vector control of asynchronous motor, the speed estimation method of the speed-sensorless should have a high accuracy. In this dissertation, the estimation method of the model reference...
This paper describes the design of a new algorithm for the rotor resistance adaptation. The obtained adaptive observer is used for the improvement of the vector control of induction motor (IM) drives. The adaptive observer detects the rotor speed and flux components in the stationary reference frame using the stator voltages and currents. Stability analysis based on Lyapunov theory is performed in...
The Induction Motor (IM) control in industrial drives is widely acknowledged for robustness and low maintenance. The vector control technique is mostly used for the speed control of IM. The hybrid control e.g. Fuzzy with classic PI control provide adequate response with load variations of motor. Speed control is a challenging task as IM is characterized by its nonlinear dynamics. In case of complex...
High performance application of induction motor is achieved through field oriented control. An induction motor is controlled in the same manner as that of separately excited DC motor in field oriented control. Different methods are proposed for speed estimation in sensorless induction motor drives. Among that, model reference adaptive systems reduce the cost and reliability problems. Rotor flux, back...
Modern motor control drives start increasing the use of various optimization techniques to tune the controller because of its accuracy and simplicity. Usually, the classical controllers used in motor control drives are not adaptable to the changes such as parameter variation, voltage unbalances, changes in load etc. So, online control should be encouraged in order to make the system robust. In this...
The paper presents an indirect vector control of induction motor fed by three-level diode clamped inverter and is implemented using fuzzy logic speed control system based on fuzzy logic approach at different operating conditions to obtain improved performance. The analysis, design and simulation using MATLAB for indirect vector control of induction motor are carried out based on fuzzy set theory....
At present, induction motors are the dominant drives in various industries. It is quite cumbersome to control an induction motor (IM) because of its poor dynamic response in comparison to the DC motor drives. The central theme of Vector Control (VC) is to decouple the stator current of the IM into two orthogonal components and is to control these two components individually so as to achieve an independent...
Model Reference Adaptive System (MRAS) is a simple approach for speed estimation of an Induction Motor (IM). It is an attractive scheme for analysis especially when knowledge relating to system parameters are poor. The technique incorporates an error signal to be generated by comparing the output of the reference model (RM) and the adjustable model (AM), respectively. The error signal generated drives...
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