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In recent years, with parameter self-tuning of the drive is concerned by national experts and scholars, which has become the focus of research. Because the induction motor has a strong coupling, nonlinear, operating parameters and other significant characteristics change, many scholars do a lot of research on the induction motor parameters identification, the parameters identification theory, many...
The purpose of this project is to drive a three phase induction motor with the use of a single photovoltaic (PV) panel. The motor will be driven with the available power at the moment, because no battery will be implemented. In order to match the impedance of the panel (to extract the maximum power available) and boost the voltage, a fly back topology is proposed. In output of the flyback a three...
A novel band adaptation algorithm for a three level torque hysteresis comparator for direct torque control (DTC) of an induction motor (IM) is presented in this paper. The hysteresis band adaptation algorithm is developed based on the slope of the estimated torque of the motor. Therefore, it does not need any extra sensor for the torque. The proposed hysteresis comparator reduces both the switching...
Due to rapid growth and declining cost of solar cells manufacturing as well as the progress of power electronics control techniques, photovoltaic energy is of increasing interest in pumping system applications particularly in the isolated area, such as in Batna region in Algeria. Thus, the enhancement of the photovoltaic pumping system efficiency depends on the optimization of the photovoltaic energy...
In this paper, the sensorless torque robust tracking problem of the induction motor for Electric vehicle (EV) applications is addressed. It analyzes on the basic principles of the sensorless vector control and space vector pulse width modulation (SVPWM), and puts forward the voltage model with compensation flux estimation method. The experimental results show that the Sensorless Vector Control System...
In this paper, the mathematical model of induction motor based on rotor field orientation in synchronous frame is introduced. Based on this, the decoupling of stator voltage is implemented using the feed forward decoupling current controller. The problem in the accuracy of flux estimation is settled using voltage model and current model flux mixing observer. Torque regulator and speed regulator are...
The main objective of this paper is to control the speed of an induction motor by using seven level diode clamped multilevel inverter. To obtain high quality sinusoidal output voltage with reduced harmonics. The proposed Scheme for diode clamped multilevel inverter is multicarrier SPWM control. An open loop speed control can be achieved by using V/f method. This method can be implemented by changing...
A method for the fault diagnosis of a broken rotor bar in induction motor is presented. The method is based on the analysis of the magnetic flux of three-phase Induction motor. The purpose of this paper is the analysis of the inverter fed induction machine with broken rotor for diagnostic purposes. The features of magnetic flux of healthy conditions of a three phase induction motor are compared with...
The aims of this work are the design and application of the indirect rotor flux-oriented control (IRFOC) with a sliding-mode controller to pilot the working of the induction motor coupled the centrifugal pump. The stability analysis based on Lyapunov theory is also presented, to guarantee the closed loop stability. Some reliable simulation results are provided in this paper in order to demonstrate...
Multilevel inverters are increasingly being used due to their superior performance compared to two-level inverters. Different circuit topologies on multilevel inverters have been extensively researched. Conduction and switching losses of IGBT in multilevel inverter is the key factor which could influence the converter reliability and efficiency. In this paper, thermal evaluation is described for four...
Voltage source inverter (VSI) fed induction motors are widely used in variable speed applications. Space Vector Pulse Width Modulation (SVPWM) has become the successful techniques to construct three phase sine wave Voltage Source Inverter (VSI) parallel to control three-phase induction motor using v/f control. Because of the low maintenance and robustness induction motors have many applications in...
In this paper a high performance Direct Torque Control (DTC) theme for the induction motor fed by indirect matrix converter is proposed and investigated. Since the indirect matrix converter has an intermediate dc link, the control process can be separated into rectifier stage modulation and inverter stage modulation. Indirect space vector modulation (ISVM) for input current is applied on the rectifier...
This paper presents a high performance Direct Torque Control (DTC) theme for the induction motor using Indirect Matrix Converter (IMC). To improve the dynamic behavior of motor, Active Learning Method (ALM) is implemented on the DTC. The ALM uses its own modeling technique called the ink drop spread (IDS) method. Functionally the IMC is very similar to the Direct Matrix Converter (DMC) but it has...
In this paper a sensorless Predictive Torque Control (PTC) is proposed. The reduced order observer is used for stator flux estimation. The prediction model and also the reduced order observer are reinforced by a proposed PI offset compensation scheme for accurate flux and torque prediction and also estimation without the need for speed sensor. Cost function base predictive control is exploited. Method...
This paper presents a novel sinusoidal pulse width modulation (SPWM) strategy for single- to three-phase matrix converter. The proposed strategy is simple to implement. Also an improved SPWM (ISPWM) strategy for decreasing total harmonic distortion (THD) is proposed. The performance of proposed SPWM strategy and ISPWM strategy are compared with each other. Detailed analysis is provided for Single...
In this paper, a fault-tolerant strategy for operation of a cascaded H-bridge multilevel drive is presented. A faulty power cell in the Cascaded H-bridge (CHB) inverter may lead to expensive downtime and great losses in the motor side. With a fault-tolerant control strategy, the operation can continue and the system reliability increases in this way. Here, the operating principle and the space vector...
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...
Modeling, simulation and implementation of Voltage Source Inverter (VSI) fed closed loop control of 3-phase induction motor drive is presented in this paper. A mathematical model of the drive system is developed and is used for the simulation study. Simulation is carried out using Scilab/Scicos, which is free and open source software. The above said drive system is implemented in laboratory using...
Based on the theory of the mathematical model of induction motor, the model of induction motor vector control is proposed with the simulation toolkit of Matlab/Simulink, and the related sub-system modules are described in detail and the specific illustrations of the sub-system are also given. Take a simulation of the system, the results such as the waveforms of the current, speed and so on could be...
Multi-level voltage source inverters offer several advantages such as a better output voltage with reduced total harmonic distortion (THD), reduction of voltage ratings of the power semiconductor switching devices and also the reduced electro-magnetic interference problems etc. This paper presents the application of simplified space vector modulation (SVM) method for three-level, five-level and seven-level...
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