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28,188 Article Results

Optimal operation of Low Cost Topology for Improving the Power Quality in the Wind Power Conversion System

10.11591/ijeecs.v1.i3.pp523-533
E Vani , N Rengarajan
In this paper, Vienna rectifier and Z Source Inverter (ZSI) based Wind Power Conversion System (WPCS) has been proposed with less number of switches to provide high quality power to off grid system.  The three phase full bridge converter has six switches for the conversion of AC-DC and also need separate DC-DC boost converter to boost the DC voltage. In the proposed WPCS, three Phase Vienna rectifier has only three switches for the conversion of AC-DC and also it boosts the DC voltage. The ZSI jointly with Vienna rectifier provides higher, boosted AC voltage and high quality power to the off grid system. The ZSI utilizes the shoot-through states to boost the DC link voltage and also, reduces the Electromagnetic Interference (EMI) noise. The combination of Vienna rectifier and Z source inverter shows the good performance which improves the efficiency and reduces Total Harmonic Distortion (THD). The performance of the proposed system is simulated using MATLAB/Simulink software. Simulation and experimental results expose that, this configuration is beneficial with respect to power quality improvement with less number of switches compared to a conventional converter.
Volume: 1
Issue: 3
Page: 523-533
Publish at: 2016-03-01

High Performance Speed Control of Single-Phase Induction Motors Using Switching Forward and Backward EKF Strategy

10.11591/ijpeds.v7.i1.pp17-27
Mohammad Jannati , Tole Sutikno , Nik Rumzi Nik Idris , Mohd Junaidi Abdul Aziz
The aim of this research is to provide a high performance vector control of single-phase Induction Motor (IM) drives. It is shown that in the rotating reference frame, the single-phase IM equations can be separated into forward and backward equations with the balanced structure. Based on this, a method for vector control of the single-phase IM, using two modified Rotor Field-Oriented Control (RFOC) algorithms is presented. In order to accommodate forward and backward rotor fluxes in the presented controller, an Extended Kalman Filter (EKF) with two different forward and backward currents that are switched interchangeably (switching forward and backward EKF), is proposed. Simulation results illustrate the effectiveness of the proposed algorithm.
Volume: 7
Issue: 1
Page: 17-27
Publish at: 2016-03-01

A comparative Study on Similarity Measurement in Noisy Voice Speaker Identification

10.11591/ijeecs.v1.i3.pp590-596
Inggih Permana
One of important part on speaker identification is the measurement of sound similarity. This study has compared two of the similarity measurement techniques in the noisy voice. First technique is done by using smallest vector sum of pairs and second technique is done by using frequency of occurrence of smallest vector pairs. Noise in the voice can reduce accuracy of speaker identification significantly. To overcome this problem, the two of similarity measurement was combined with Least Mean Square (LMS) for remove noise. Results of the experiments showed that the use of LMS can improve the accuracy of speaker identification at the two of similarity measurement techniques. Second technique produces better accuracy than first technique. Experimental result also showed improvement of LMS learning rate can improve the accuracy of speaker identification.
Volume: 1
Issue: 3
Page: 590-596
Publish at: 2016-03-01

A Comprehensive Overview of Electric Vehicle Charging using Renewable Energy

10.11591/ijpeds.v7.i1.pp114-123
Abdul Rauf Bhatti , Zainal Salam , Mohd Junaidi Bin Abdul Aziz , Kong Pui Yee
The integration of PV with the electric vehicle (EV) charging system has been on the rise due to several factors, namely continuous reduction in the price of PV modules, rapid growth in EV and concern over the effects of greenhouse gases. Over the years, numerous papers have been published on EV charging using the standard utility (grid) electrical supply; however, there seems to be an absence of a comprehensive overview using PV as one of the components for the charger. With the growing interest in this topic, it is timely to review, summarize and update all the related works on PV charging, and to present it as a single reference. For the benefit of a wider audience, the paper also includes the background of EV, as well as a brief description of PV systems. Some of the main features of battery management system (BMS) for EV battery are also presented. It is envisaged that the information gathered in this paper will be a valuable one–stop source of information for researchers working in this topic.The integration of PV with the electric vehicle (EV) charging system has been on the rise due to several factors, namely continuous reduction in the price of PV modules, rapid growth in EV and concern over the effects of greenhouse gases. Over the years, numerous papers have been published on EV charging using the standard utility (grid) electrical supply; however, there seems to be an absence of a comprehensive overview using PV as one of the components for the charger. With the growing interest in this topic, it is timely to review, summarize and update all the related works on PV charging, and to present it as a single reference. For the benefit of a wider audience, the paper also includes the background of EV, as well as a brief description of PV systems. Some of the main features of battery management system (BMS) for EV battery are also presented. It is envisaged that the information gathered in this paper will be a valuable one–stop source of information for researchers working in this topic.
Volume: 7
Issue: 1
Page: 114-123
Publish at: 2016-03-01

Close Loop V/F Control of Voltage Source Inverter using Sinusoidal PWM, Third Harmonic Injection PWM and Space Vector PWM Method for Induction Motor

10.11591/ijpeds.v7.i1.pp217-224
Sandeep Ojha , Ashok Kumar Pandey
The aim of this paper to presents a comparative analysis of Voltage Source Inverter using Sinusoidal Pulse Width Modulation Method, Third Harmonic Injection Pulse Width Modulation Method and Space Vector Pulse Width Modulation Two level inverter for Induction Motor.  In this paper we have designed the Simulink model of Inverter for different technique. An above technique is used to reduce the Total Harmonic Distortion (THD) on the AC side of the Inverter. The Simulink model is close loop. Results are analyzed using Fast Fourier Transformation (FFT) which is for analysis of the Total Harmonic Distortion. All simulation are performed in the MATLAB Simulink / Simulink environment of MATLAB.
Volume: 7
Issue: 1
Page: 217-224
Publish at: 2016-03-01

A Review on Performance Analysis of Matrix Converter Fed AC Motor Drive

10.11591/ijpeds.v7.i1.pp85-93
Sri Vidhya Dhandapani , Venkatesan Thangavel
This paper presents a review on the analysis of characteristics that determines the performance of the matrix converter fed AC motor drive. Review is made based on the analysis of the different characteristics achieved in the literature. Different characteristic parameters considered in this paper are total harmonic distortion, common mode voltage, voltage transfer ratio and efficiency. Comparison and analysis of these characteristic parameters is done based on various semi conductor switches, topology, and control and modulation techniques.
Volume: 7
Issue: 1
Page: 85-93
Publish at: 2016-03-01

Advanced Optimal PSO, Fuzzy and PI Controller with PMSM and WTGS at 5Hz Side of Generation and 50Hz Side of Grid

10.11591/ijpeds.v7.i1.pp173-192
Salam Waley Shneen , Chengxiong Mao , Dan Wang
To use different control systems, Like Classical PI Controller, Expert System, Fuzzy Logic Controller and Optimization PSO Controller. It used to control for PMSM which worked in integration system to Wind Energy. Wind Energy content of wind turbine, PMSM, Rectifier, DC bus, Inverter, Filter, Load and Grid. In the first step, to run the PMSM with different speeds to get different frequency to selected the frequency in side of generation with the rated speed. Second step, solve the mathematical equation to use different values of wind speed with selected (15,20 m/s and less than with more than 15&20m/s). Third step, Calculation the power generation with wind speed (15 m/5 & 20 m/s). Fourth step, using these component system Rectifier, DC bus, Inverter, Filter, Load & Grid with WTGS & PMSM. Final step, use different control systems, Like Classical PI Controller, Expert System Fuzzy Logic Controller and Optimization PSO Controller With PMSM to analysis all results after using the simulation model of proposed variable speed based WECS. The wind turbine coupled with PMSM.A closed loop control system with a PI control,Fuzzy, PSO in the speed loop with current controllers .The simulation circuits for PMSM, inverter, speed and current controllers include all realistic components of the drive system. These results also confirmed that the transient torque and current never exceed the maximum permissible value.
Volume: 7
Issue: 1
Page: 173-192
Publish at: 2016-03-01

Constant Frequency Torque Controller for DTC with Multilevel Inverter of Induction Machines

10.11591/ijpeds.v7.i1.pp28-44
Norjulia Mohamad Nordin , Naziha Ahmad Azli , Nik Rumzi Nik Idris , Nur Huda Ramlan , Tole Sutikno
Direct Torque Control using multilevel inverter (DTC-MLI) with hysteresis controller suffers from high torque and flux ripple and variable switching frequency. In this paper, a constant frequency torque controller is proposed to enhance the DTC-MLI performance. The operational concepts of the constant switching frequency torque controller of a DTC-MLI system followed by the simulation results and analysis are presented. The proposed system significantly improves the DTC drive in terms of dynamic performance, smaller torque and flux ripple, and retain a constant switching frequency.
Volume: 7
Issue: 1
Page: 28-44
Publish at: 2016-03-01

Twitter Tweet Classifier

10.11591/ijai.v5.i1.pp41-44
Ashwin V
This paper addresses the task of building a classifier that would categorise tweets in Twitter. Microblogging nowadays has become a tool of communication for Internet users. They share opinion on different aspects of life. As the popularity of the microblogging sites increases the closer we get to the era of Information Explosion.Twitter is the second most used microblogging site which handles more than 500 million tweets tweeted everyday which translates to mind boggling 5,700 tweets per second. Despite the humongous usage of twitter there isn’t any specific classifier for these tweets that are tweeted on this site. This research attempts to segregate tweets and classify them to categories like Sports, News, Entertainment, Technology, Music, TV, Meme, etc. Naïve Bayes, a machine learning algorithm is used for building a classifier which classifies the tweets when trained with the twitter corpus. With this kind of classifier the user may simply skim the tweets without going through the tedious work of skimming the newsfeed.
Volume: 5
Issue: 1
Page: 41-44
Publish at: 2016-03-01

Design of Three-Phase Three-Switch Buck-Type Rectifier for Pre-Charging Application

10.11591/ijpeds.v7.i1.pp124-133
Anandh S , Vijayan S , Paramasivam Paramasivam
The main objective of a pre-charging circuit in variable frequency drives is to pre-charge the DC-bus capacitor without any voltage and current overshoot within the specified time. In exisiting variable frequency drives seperte pre-charging circuits (or) thyristor bridges were used due to this drives power density, cost becomes high and control technique becomes complex.  This paper presents about the design of three-phase three-switch buck-type rectifier for pre-charging application used in variable frequency drives which elimates the disadvantages of existing techniques. In this paper we will discuss about design procedure of pre-charging circuit of an 800KW converter with dc-link output voltage of 775V at an input ac voltage of 550V, 60Hz, selection of power and passive components, voltage and current stress of power transistors. In the final this paper discusses about loss distribution of the components and comparison of new converter technique with existing pre-charging techniques.
Volume: 7
Issue: 1
Page: 124-133
Publish at: 2016-03-01

A Shunt Active Power Filter for 12 Pulse Converter Using Source Current Detection Approach

10.11591/ijpeds.v7.i1.pp225-234
Rajesh T , Nirmalkumar A
A shunt Active Power Filter (APF) with current detection at the source side is considered as a closed-loop system from the view of the whole power distribution system, which is expected with better harmonics filtering performance compared with conventional current detection methods such as load current detection and open loop control.  This paper introduces an efficient source current detection method (direct) control scheme to mitigate the grid current harmonics generated by the twelve pulse converter.  The proposed system uses Control Rectifier (12 –pulse converter) which efficiently regulates the DC voltage by varying the angle of each 6 pulse converter. Moreover, the proposed system uses three winding transformer which eliminates the harmonics during equal angles switching at each six pulse converter which in turn simplifies the operation of the SAPF. The proposed system is simulated in MATLAB SIMULINK to evaluate the performance of the proposed system.
Volume: 7
Issue: 1
Page: 225-234
Publish at: 2016-03-01

Enhanced Derivative-Free Conjugate Gradient Method for Solving Symmetric Nonlinear Equations

10.11591/ijaas.v5.i1.pp50-57
Jamilu Sabi'u
In this article, an enhanced conjugate gradient approach for solving symmetric nonlinear equations is propose without computing the Jacobian matrix. This approach is completely derivative and matrix free. Using classical assumptions the proposed method has global convergence with nonmonotone line search. Some reported numerical results shows the approach is promising. 
Volume: 5
Issue: 1
Page: 50-57
Publish at: 2016-03-01

Effect of Novel Nanocomposite Materials for Enhancing Performance of Thin Film Transistor TFT Model

10.11591/ijaas.v5.i1.pp1-12
Youssef Ahmed Mobarak , Moamen Atef
The potential impact of high permittivity gate dielectrics on thin film transistors short channel and circuit performance has been studied using highly accurate analytical models. In addition, the gate-to-channel capacitance and parasitic fringe capacitances have been extracted. The suggested model in this paper has been increased the surface potential and decreased the threshold voltage, whenever the conventional silicon dioxide gate dielectric is replaced by high-K gate dielectric novel nanocomposite PVP/La2O3Kox=25. Also, it has been investigated that a decrease in parasitic outer fringe capacitance and gate-to-channel capacitance, whenever the conventional silicon nitride is replaced by low-K gate sidewall spacer dielectric novel nanocomposite PTFE/SiO2Ksp=2.9. Finally, it has been demonstrated that using low-K gate sidewalls with high-K gate insulators can be decreased the gate fringing field and threshold voltage. In addition, fabrication of nanocomposites from polymers and nano-oxide particles found to have potential candidates for using it in a wide range of applications in low cost due to low process temperature of these nanocomposites materials.
Volume: 5
Issue: 1
Page: 1-12
Publish at: 2016-03-01

Methods of Assess the Impact of Technological Variables Complex Spatial-Distributed Systems on Costs

10.11591/ijaas.v5.i1.pp45-49
Korneev A.M. , Shmyrin A.M. , Lavrukhina T.V. , Abdullakh L.S.
The paper considers the method of calculating costs, taking into account the effect of technological parameters; the model of forecasting of costs of production resources based on the matrix of costs are described; the methods of assess the impact of parameters of complex spatial-distributed systems on costs are presented.
Volume: 5
Issue: 1
Page: 45-49
Publish at: 2016-03-01

Experimental Investigations of the Self-Controlled Synchronous Motor Connected to a Three-Phase Line Commutated SCR Inverter

10.11591/ijpeds.v7.i1.pp1-6
Tapan Kumar Chakraborty
This paper concerns the experimental investigations of the three-phase line commutated SCR inverter fed synchronous motor.  The fabricated system consists of a line-commuted inverter, a three-phase synchronous motor with the excitation winding connected in series to the inverter input, a terminal voltage sensor and a gate-pulse generating circuit. The firing pulses for SCRs of the inverter are generated by the microprocessor in proper sequence with the help of synchronizing signal derived from the terminal voltages of the synchronous machine. The steady state performance characteristics are obtained experimentally using the fabricated system. The experimental results show that a three-phase synchronous motor supplied by a line commutated inverter with the excitation winding connected in series to the dc link provide  excellent characteristics of the conventional dc series motor. 
Volume: 7
Issue: 1
Page: 1-6
Publish at: 2016-03-01
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