Print ISSN: 1681-6900

Online ISSN: 2412-0758

Keywords : Induction Motor

Direct Torque Control of Induction Motor Based on Neurofuzzy

Abdulrahim T. Humod; Wiam I. Jabbar

Engineering and Technology Journal, 2013, Volume 31, Issue 17, Pages 3259-3273

The main objective of this work is to improve the speed and torque responses of
three phase Induction Motor (IM) during different loads and speeds conditions.
Induction Motor is most commonly used in different industrial applications, that
require fast dynamic response and accurate control over wide speed ranges.
Therefore, this work proposes Direct Torque Control (DTC). Particle Swarm
Optimization (PSO) technique is used for optimal gains tuning of PI. The results
show the improvement in the speed response of DTC, in terms of reducing steady
state error, ripple reduction in the torque and speed responses. Neurofuzzy
(ANFIS) controller is used to improve the performance of PI-PSO controller.
ANFIS controller is trained by using PI-PSO data. The results of the ANFIS
controller are better than PI-PSO in terms of torque ripple minimization, less
steady state error in the speed response and more robustness. The simulation of the
overall drive system is performed using MATLAB/Simulink program version 7.10

Harmonics Study of 3-Phase Space Vector PWM Inverter

Ahamed Assad Hadi; Majid K. Al-Khatat

Engineering and Technology Journal, 2011, Volume 29, Issue 12, Pages 2439-2455

This paper proposes the modeling ,implementation and simulation of three phase induction motor driver, using voltage- fed space vector pulse width modulation technique (SVPWM).The sources of total harmonics (i.e. total effective harmonics,inter-harmonics,and sub-harmonics) and how it affects on drive system and their affects on the supply power network are studied. A developed formula of total harmonics distortion factor (THD) including ,inter -harmonic, and sub- harmonic has been introduced while in the previous studies are neglected. The effect of inter-harmonics and sub-harmonics on the performance parameter of total harmonics distortion factor , switching losses factor (SLF) and quality factor (QF) has been deduced. Modeling , and simulation of the system using PSIM software are also presented. All results are obtained by studying the waveforms of voltage and current at the source and load sides with different speeds of motor drive. The simulation and experimental result are consistent with theoretical studies and excellent , they indicate that the model is accurate and practicable.

Analysis of Z-Source Inverter For Space Vector PWM Fed 3-Phase InductionMotor

Majid K. Al-Khatat

Engineering and Technology Journal, 2010, Volume 28, Issue 17, Pages 5440-5454

This paper presents analysis of operation and implementation of Z-source space vector pulse width modulation (SVPWM) inverter fed three phase induction motor. The Z-source is an alternative power conversion topology that can both buck and boost the input voltage using only passive components. It uses a unique LC impedance network in
the DC link between rectifier and inverter fed induction motor. It also allows the use of the shoot-through switching state, which eliminates or reduces the dead-times that are used in the conventional inverters. Therefore, the Z-source inverter can buck and boost voltage to a desired output voltage that is greater than the available input voltage. In addition, it reduces the harmonics, improves power factor, increases reliability ,low cost and highly efficient single-stage structure for buck and boost power conversion. Theoretical analysis and simulation studies using PSIM software have been performed
to demonstrate these new features.