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Many real dynamical processes in control engineering practice can be modelled as a first order plant with saturation at its input. This paper proposes a new solution to control such plants, which is a combination of discrete-time first-order sliding mode (SM) control and discrete-time realization of super twisting control algorithm (STA) that is commonly used in second-order SM. A brief mathematical...
In the article, a new approach is considered, which is applying different test current to the motor, closed-loop regulation and making it reach a steady state, finally filtering calculation and getting all the parameters of the motor accurately. This method can run automatically before the induction motor vector controls. So it can improve the performance of vector control without increasing hardware...
This paper proposed the new control method of the sensorless dual parallel Induction motor drive system which can maintained the steady speed under unbalanced load condition. This method uses new modified observer design technique for mono inverter dual drive system of same parameters and ratings connected in parallel. The simulation work has been reported for different step changes in speed for balanced...
This paper, deals with a new input-output sliding mode linearization control for induction motor combined with field oriented control (FOC). To control the speed and rotor flux modulus, we develop two loops. The first one, inner loop, allows to linearize the system by a choose of closed loop poles to achieve a good linearization. The choice of a particular sliding surface permits to create a link...
This paper presents design, analysis and simulation of fuzzy logic controller for indirect field oriented control (FOC) of induction motor drives. The induction motor drive is controlled using a FOC, which allows a fast transient response of the system by controlling a decoupled flux and torque components. Moreover, a fuzzy pre-compensated proportionalintegral (PI) controller is used for attaining...
In this paper, performance of an indirect vector control induction motor (IVCIM) has been studied with proportional plus integral (PI), fuzzy logic and neural network (NN) based controllers. Implementation of PI, fuzzy logic control and NN predictive control for studies of regulation of speed in IVCIM is described under different operating conditions of induction motor. Simulation studies of IVCIM...
The paper presents a fuzzy logic speed control system based on fuzzy logic approach for an indirect vector controlled induction motor drive for high performance. The analysis, design and simulation of the fuzzy logic controller for indirect vector control induction motor are carried out based on fuzzy set theory. The proposed fuzzy controller is compared with PI controller with no load and various...
In this paper two methods of torque control for induction motor have been investigated. First DTC method is implemented by using PI regulators and three-level inverter. Then an improved predictive torque control is developed and performed with two-level inverter. In the proposed predictive control the next torque and flux are predicted by discrete model of motor and inverter. Afterward the feasible...
This Paper presents a Particle Swarm Optimization (PSO) method to determine the optimal proportional-integral (PI) or proportional-integral derivative (PID) controller parameters, for speed control of a Field Oriented Control (FOC) induction motor. The FOC induction motor has been modeled in MATLAB (Simulink) and the PSO algorithm has been programmed and implemented in MATLAB. Comparing with traditional...
This paper presents a Genetic Algorithm (GA) based fast speed response controller for poly-phase induction motor drive. Here the proportional and integral gains of PI controller are optimized by GA to achieve quick speed response. An adaptive Recurrent Neural Network (RNN) with Real Time Recurrent Learning (RTRL) algorithm is proposed to estimate rotor flux. An online tuning scheme to update the weight...
A comparative study has been made for closed loop performance of CSI fed induction motor using fuzzy logic PI controller with conventional PI controller. A slip control scheme has been used for the induction motor. The evaluation of the controller's behavior is made through computer simulation with MATLAB coding. The starting transients of the motor are investigated for different operating speeds...
Based on the conventional vector control model of induction motor, a four parallel-connected induction motors system combining the average idea was established, which takes different parameters and unbalanced loads into account. Because of the limitations of PI control and fuzzy sliding mode control (FSMC) into the ac speed regulating system, the paper proposes a two-state control method absorbing...
The control problem of the plant, which is characterized by the different response delay for the rise and fall of the plant input has been analyzed. It is shown that the modified PI controller with the switched values of parameters enables improving the control quality of such plant.
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...
Induction motor is the most used in industry because of its high robustness, reliability, low cost, high efficiency and good self starting capability. In spite of this popularity, the induction motor has two inherent limitations: (1) the standard motor is not a true constant-speed machine, its full-load slip varies less than 1% (in high-horsepower motors). And (2) it is not inherently capable of providing...
Present work shows the merits of space vector modulation direct torque control(SVM-DTC) over the conventional direct torque control(conventional DTC). SVM-DTC technique is helpful in solving the basic issues of torque ripple and variable swithing frequency present in the conventional DTC. In order to get the reference voltage vector which is necessary for the SVM-DTC, this paper describes a method...
The dynamics of the induction motor drive can be made independent of the position as well as speed control by using the field oriented control strategies. There are various techniques available under this category. One of such strategies is Indirect Field-Oriented Control method for the Induction motor drive. The speed control is observed in both, open-loop and closed-loop control applications. The...
This paper presents an original variable gain PI (VGPI) controller for speed control of a simplified direct torque neuro fuzzy controlled (DTNFC) induction motor drive. First, a simplified direct torque neuro fuzzy control (DTNFC) for a voltage source PWM inverter fed induction motor drive is presented. This control scheme uses the stator flux amplitude and the electromagnetic torque errors through...
In the following paper, we propose a new input-output sliding mode linearization control for induction motor combined with field oriented control (FOC). We develop two loops to control the speed and rotor flux modulus. The first one, inner loop, allows to linearize the system by a choose of closed loop poles to achieve a good linearization. The choice of a particular sliding surface permits to create...
The design and implementation of an adaptive neural network based proportional-integral controller (NNPIC) were carried out on the direct torque control (DTC) system. The proposed controller consists of neural network and projection algorithm, in order to tune its parameters adaptively online under environmental variations. The experimental results proved that the performance of the proposed controller...
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