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In this paper, a kind of feed forward neural network (NN) with three layers was applied to direct torque control (DTC) of induction motor. And backward propagation (BP) algorithm was used to train the network. The comparison with conventional direct torque control show that the proposed method reduce the torque, stator flux, and current ripples. The(More)
The particle swarm optimization (PSO) algorithm is widely used in identifying Takagi-Sugeno (T-S) fuzzy system models. However, PSO suffers from premature convergence and is easily trapped into local optima, which affects the accuracy of T-S model identification. An immune coevolution particle swarm optimization with multi-strategy (ICPSO-MS) is proposed(More)
Proportional Integral Derivative (PID) controllers are widely used as a means of controlling system outputs. Many techniques have been developed to tune the PID parameters. In this article, adaptive genetic algorithms (AGA) are proposed as a method for PID optimization and compared with those of traditional optimizations methods. Simulations with different(More)
Fast dynamic response and small ripple of stator flux and torque is the goal to control induction motor (IM) using direct torque control (DTC). However, convectional two-value hysteresis controller in DTC result in large torque and flux ripples. In this paper, a controller based on fuzzy logic is designed to improve the performance of DTC. The validity of(More)
Extended Kalman filter (EKF) is widely used for speed estimation in sensorless vector control of induction motor. The major and unsolved issue in the practical implementation of the EKF is the choice of the process and measurement noise covariance matrices. In this paper, a speed estimation method using EKF optimized by improved particle swarm optimization(More)
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(More)
Aimed at the current shortages that exist in the practice and training of an engineering automation specialty in the undergraduate level courses in Chinese universities, the CDIO method (Conceive, Design, Implement, Operate) was applied to reform education and training. To optimise the outcomes, Conceive, Design, Implement, Operate was combined with project(More)
Estimation of rotor resistance rapidly and accurately has received a lot of attention due to its significance in improving the performance of induction motor(IM) vector control system. In this paper, algorithm of estimating rotor resistance of IM based on extended Kalman filter(EKF) is presented. The algorithm can estimate the rotor resistance on line by(More)
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