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25,002 Article Results

Electrical Properties of Indium doped Alumina (Al2O3) Thin Films

https://ijeecs.iaescore.com/index.php/IJEECS/article/view/1473
Hadaate Ullah , Shahin Mahmud
To know the electrical properties of any materials is very important for practical application of that material. In this paper I have tried to find out the proper electrical properties of Indium doped Alumina (Al2O3) for practical application of this Alumina. For this purpose all thin films are deposited on glass substrate by electron beam evaporation technique at a pressure of about 1.5 x 10-6 torr and at temperature of 307K. The thickness of Indium doped Al2O3 films (25%w, 30%w and 40% w of In2O3) range from 68 nm to 183 nm. For 25% In2O3 doped alumina the conductivity at room temperature is 24.10mho/cm, for 30% In2O3 doped alumina this value is 82.99mho/cm and for 40% In2O3 doped alumina this is 129.10mho/cm. The resistivity and sheet resistance decrease with the increase of doping concentration that means the conductivity increases with doping concentration. DOI: http://dx.doi.org/10.11591/telkomnika.v14i2.7747 
Volume: 14
Issue: 2
Page: 266-269
Publish at: 2015-05-01

A Minimax Polynomial Approximation Objective Function Approach for Optimal Design of Power System Stabilizer by Embedding Particle Swarm Optimization

https://ijeecs.iaescore.com/index.php/IJEECS/article/view/1465
Bhanu Pratap Soni , Akash Saxena , Vikas Gupta
The paper presents a novel approach based on Minimax approximation and evolutionary tool Particle Swarm Optimization (PSO) to fabricate the parameters of Power System Stabilizers (PSSs) for multi machine power systems. The proposed approach employs PSO algorithm for find the setting of PSS parameters. The worth mentioning feature of this work is the formulation of objective function with the help of swing curves interpolation. A novel transformation known as minimax approximation is used for converting the objective into the polynomials of degree one, two and three. To construct the objective function based on interpolation second order sensitivity analysis is performed. The performance of the PSSs is tested under different topological changes, operating conditions and system configurations. Nonlinear simulation reveals that proposed PSSs are effectively deal with local and interarea modes of oscillations. PSS design obtained through lower order polynomial expression of objective function is able to deal with the oscillatory modes efficiently. DOI: http://dx.doi.org/10.11591/telkomnika.v14i2.7602
Volume: 14
Issue: 2
Page: 191-198
Publish at: 2015-05-01

An Approach of PFC in BLDC Motor Drives Using BLSEPIC Converter

https://ijeecs.iaescore.com/index.php/IJEECS/article/view/1468
Murugan M , Jeyabharath R , Sarankumar V
This paper presents the analysis and design of on front end bridgeless single-ended primary-inductance converter (BLSEPIC) based power factor rectification, with output voltage regulation and high frequency isolation working in discontinuous conduction mode. The switching loss in VSI is minimized by an electronic commutation of Brushless DC motor (BLDCM) is used to operate in a low-frequency operation. To improve the efficiency, the diode bridge rectifier is replaced with the alternate bridgeless topologies which offers less conduction losses, advised by the international power quality standards, a wide range of speed control is obtained with improved power quality BLDC motor drive is proposed and simulated in MATLAB/SIMULINK. DOI: http://dx.doi.org/10.11591/telkomnika.v14i2.7404 
Volume: 14
Issue: 2
Page: 215-221
Publish at: 2015-05-01

The Feasibility Study of Using Space Vector Modulation Inverters in Two-Level of Integrated Photovoltaic System

https://ijeecs.iaescore.com/index.php/IJEECS/article/view/1467
Mahmoud Zadehbagheri , Amin Payedar
In this paper a system of integrated photovoltaic converter with vector switching control inverter with the modulation method of spatial two-level has been presented. The structure of the system is presented with the proposed and the structure of the invertors’ voltage source has been reviewed. Space vector modulation control method of two-level in a voltage source inverter and then provide proposed system analysis and keying modes are analyzed and the system designing and with the simulation of MATLAB software and standards of the total harmonic distortion for a few modulation methods for comparison, and evaluation has been proposed. The system has been analyzed in terms of economic. A prototype for assessing and comparing with power of 360w in the output with DC link voltage is 400 V and the module voltage is 46.5v has an efficiency of 97.9% in its output that improved than SPWM of 1.6% and to the PWM of 2.7% and Has been simulated with MATLAB software and compared to with a few examples of the control systems of the sinusoidal pulse width modulation and pulse width modulation. Speed and Switching and performance of the system have been analyzed and methods to reduce switching losses and increase of the system efficiency in the practical examples are proposed. DOI: http://dx.doi.org/10.11591/telkomnika.v14i2.7414
Volume: 14
Issue: 2
Page: 205-214
Publish at: 2015-05-01

New Bipolar Hybrid Carrier PWM Strategies for Symmetrical Multilevel Inverter

https://ijeecs.iaescore.com/index.php/IJEECS/article/view/1470
C.R. Balamurugan , S.P. Natarajan , R. Bensraj
In this paper, hybrid modulation methods suitable for H-bridge MLI are discussed. The results of experimental work using dSPACE system only are presented for three phase five level cascaded type inverter. Different hybrid carrier PWM (Pulse Width Modulation) strategies using sinusoidal reference, third harmonic injection reference, 60 degree reference and stepped wave reference for the chosen inverter are initially developed using SIMULINK. Strategies developed are then implemented in real time using dSPACE/RTI. The five level output voltages of the chosen MLI (MultiLevel Inverter) obtained using the dSPACE system based PWM strategies and the corresponding % THD (Total Harmonic Distortion) and VRMS (fundamental) are presented and analyzed. It is seen that sinusoidal reference with PS+VF (Phase shift+Variable Frequency) and PS+PD (Phase Disposition) provides output with relatively low distortion. APOD+CO (Alternative Phase Dispostion+Carrier Overlapping) and CO+PD PWM strategy is found to perform better since it provides relatively higher fundamental RMS output voltage and relatively lower stress on the devices. It is displayed that THI (Third Harmonic Injection) reference with PS+VF and CO+PS provides output with relatively low distortion. APOD+CO and CO+PS PWM strategy is found to perform better since it provides relatively higher fundamental RMS output voltage and relatively lower stress on the devices. It is observed that 60 degree reference with PD+VF provides output with relatively low distortion. CO+PD PWM strategy is found to perform better since it provides relatively higher fundamental RMS output voltage and relatively lower stress on the devices. It is noted that stepped wave reference with APOD+PD and PD+VF provides output with relatively low distortion. APOD+CO and CO+PD PWM strategy is found to perform better since it provides relatively higher fundamental RMS (Root Mean Square) output voltage and relatively lower stress on the devices. The simulation and hardware results closely match with each other. DOI: http://dx.doi.org/10.11591/telkomnika.v14i2.7362 
Volume: 14
Issue: 2
Page: 228-240
Publish at: 2015-05-01

Thermal Behavior of an Integrated Square Spiral Micro Coil

https://ijeecs.iaescore.com/index.php/IJEECS/article/view/1472
Y. Benhadda , A. Hamid , T. Lebey , A. Allaoui , M. Derkaoui , R. Melati
We present in this paper a study on the thermal behavior of a square micro coil that will be integrated in a DC-DC micro converter. The first, we calculate the value of inductance. The second, we descript our micro coil; dimensioning, electrical model, and formula of loss. A buck micro converter schematic simulation coupled with ideal and integrated micro coil was presented. This conceptual model of the buck is best understood in terms of the relation between current and voltage of the inductor. Finely, we determinate a mathematical expression giving the evolution of temperatures in an integrated micro coil using the separation of variables method and a visualization of the thermal behavior is determined in 2D and 3D space dimension using the finite element method. DOI: http://dx.doi.org/10.11591/telkomnika.v14i2.7361
Volume: 14
Issue: 2
Page: 250-265
Publish at: 2015-05-01

Technology Content Analysis with Technometric Theory Approach to Improve Performance in Radiodiagnostic Installation

https://ijeecs.iaescore.com/index.php/IJEECS/article/view/1486
Bambang Guruh Irianto , Abdul Rahman , Herry Andayani
Installation Radiodiagnostic RSU Haji Surabaya facilitated some medical equipment for disease examinations  and have three  technology criteria: Examination by high technology equipment   (single-slice CT Scan), examination by intermediate equipment (General x-ray ≤ 300 mA / 125 KV) and examination by simple equipment  (Portable Dental x-ray ≤ 8 mA / 70 KV). When viewed in terms of revenue contribution to the Hospital, Radiodiagnostic Installation revenue from 2008 to 2012 has decreased continuously.  The aim of research for  measuring the contribution of each component technology: Tehnoware, Humanware, Inforware, and Orgaware on radiodiagnostic installation with the basic technometric theory approach  using indicator TCC (Technology Contribution Coefficien). The final results showed that a gap is almost evenly from the three technology components Humanware = 0519, Inforware = 0.538, orgaware = 0.534, but the gap is greatest in technology components Technoware = (0387, 0258, 0168), meaning that the strategy development units Radiodiagnostic  Installation prioritized to increase in aspect Technoware (rejuvenation medical equipment). DOI: http://dx.doi.org/10.11591/telkomnika.v14i2.7676
Volume: 14
Issue: 2
Page: 353-362
Publish at: 2015-05-01

The Design and Simulation of Fuzzy PID Parameter Self-tuning Controller

https://ijeecs.iaescore.com/index.php/IJEECS/article/view/1477
Wei Xie , Jianmin Duan
Based on parameter self-tuning fuzzy PID controller, a fuzzy inference method is utilized to realize automatic regulating PID parameter, and the application of the controller in a system is studied with MATLAB in this paper. The combination of PID controller system and fuzzy controller system combines the convenience of PID control together with the flexibility of fuzzy control, and takes advantage of the traditional control, which has a great practical significance. The results of simulation show that fuzzy PID parameter self-tuning controller has a better control effect than the traditional one, and can improve the static and dynamic properties of the system well. DOI: http://dx.doi.org/10.11591/telkomnika.v14i2.7674 
Volume: 14
Issue: 2
Page: 293-297
Publish at: 2015-05-01

QCA and CMOS Nanotechnology Based Design and Development of Nanoelectronic Security Devices with Encryption Schemes

https://ijeecs.iaescore.com/index.php/IJEECS/article/view/1474
Devendra K. Verma , P. K. Barhai , V. Nath
In WiMAX/WiFi Wireless Environment the Transfer of Data/Information is vulnerable to external attacks as it takes place through an open-air medium. The Data/Information is vulnerable to Jamming, Detection, Interception, Network Injection, Interruption, Modification, Packet Scrambling, Fabrication, Unauthorised forwarding and Denial-of-Service (DoS). Our Research Work focuses on ‘QCA & CMOS Nanotechnology based Design & Development of Nanoelectronic Security Devices with Encryption Schemes to provide/enhance Security and Privacy for WiMAX/WiFi/Satellite Wireless Communication Systems. The Schemes are based on Dynamic Channel Hopping, Random Channel Selection, Cryptography and Encryption of Information/Data/Control Codes. DOI: http://dx.doi.org/10.11591/telkomnika.v14i2.7485
Volume: 14
Issue: 2
Page: 270-279
Publish at: 2015-05-01

The Detection of straight and Slant Wood Fiber Through slop angle fiber feature

https://ijeecs.iaescore.com/index.php/IJEECS/article/view/1481
Ratri Dwi Atmaja , Erwin Susanto , Junartho Halomoan , Gurnita Koncara Indraloka , Muhammad Ary Murti
Quality control is one of important process that can not be avoided in industry. Image processing technique is required to distinguish the quality of wood. If it can be done automatically by the computer, it will be very helpful. This paper discusses the detection of straight and slant wood fiber to distinguish it’s quality. This paper propose an algorithm by using only two features i.e. mean (average value of slop angle fiber) and maximumangle (the maximum value of slop angle fiber). Then the classification method is used by tresholding. The result shows the performance is achieved on accuracy 79.2%. DOI: http://dx.doi.org/10.11591/telkomnika.v14i2.7725
Volume: 14
Issue: 2
Page: 318-322
Publish at: 2015-05-01

Power Quality Improvement Using Custom Power Devices in Squirrel Cage Induction Generator Wind Farm to Weak-Grid Connection by using neuro-fuzzy control

10.11591/ijpeds.v5.i4.pp477-485
Kopella Sai Teja , R.B.R. Prakash
Wind farm is connected to the grid directly.The wind is not constant voltage fluctuations occur at point of common coupling (PCC) and WF terminal . To over come this problem a new compensation strategy is used . By using Custom power devices (UPQC).It injects reactive power at PCC . The advantages of UPQC is it consists of both DVR and D-STATCOM . DVR is connected in series to the line and it injects in phase voltage into the line .D-STATCOM is connected shunt to the line .The internal control strategy is based on management of active and reactive power in series and shunt converters of UPQC . The power exchainge is done by using DC-link
Volume: 5
Issue: 4
Page: 477-485
Publish at: 2015-04-12

Bus Arrival Prediction – to Ensure Users not to Miss the Bus

10.11591/ijece.v5i2.pp333-339
Lutfi Fanani , Achmad Basuki , Deron Liang
Predicting arrival times of buses is a key challenge in the context of building intelligent public transportation systems. The bus arrival time is the primary information for providing passengers with an accurate information system that can reduce passenger waiting times. In this paper, we used the normal distribution method to the random of travel times data in a bus line number 243 in Taipei area. In developing the models, data were collected from Taipei Bus Company. A normal distribution method used for predicting the bus arrival time in bus stop to ensure users not to miss the bus, and compare the result with the existing application. The result of our experiment showed that our proposed method has a better prediction than existing application, with the probability user not to miss the bus in peak time is 93% and in normal time is 85%, greater than from the existing application with the 65% probability in peak time, and 70% in normal time.
Volume: 5
Issue: 2
Page: 333-339
Publish at: 2015-04-02

Building Integrated Photovoltaic is a Cost Effective and Environmental friendly Solution

https://ijeecs.iaescore.com/index.php/IJEECS/article/view/1447
M T ripathy , P K Sadhu
Building integrated photovoltaic (BIPV) market is under developing stage with a relatively low number of installations worldwide. However, integrating photovoltaic technology into buildings is straight forward as no additional space is required and building materials are simply replaced by PV modules. Although BIPV is considered a promising technology, especially where land for large-scale PV plants is rare, several factors continue to constrain its wide-spread adoption BIPV thus promises to become an attractive alternative for both end users and for national policy makers. In this paper we analyse the investment of BIPV, benefits of BIPV power system and cost of BIPV power system. DOI: http://dx.doi.org/10.11591/telkomnika.v14i1.7729 
Volume: 14
Issue: 1
Page: 49-54
Publish at: 2015-04-01

Simplified Method for Single Line to Ground-Fault Location in Electrical Power Distribution Systems

10.11591/ijece.v5i2.pp221-230
Mustapha Zahri , Youssef Menchafou , Hassane El Markhi , Mohamed Habibi
Power distribution systems play important roles in modern society. When distribution system outages occur, speedy and precise fault location is crucial in accelerating system restoration, reducing outage time and significantly improving system reliability, and then improves the quality of services and customer satisfaction. In this paper, we propose a reduced algorithm utilizing the sum of sending-end currents of the three phases to calculate the fault current, and therefore, avoid the iterative aspect of the classic algorithm for single line to ground fault location and reduce its computational charge. The test results are obtained from the numerical simulation using the data of a distribution line recognized in the literature.
Volume: 5
Issue: 2
Page: 221-230
Publish at: 2015-04-01

A Novel Spectral Clustering based on Local Distribution

10.11591/ijece.v5i2.pp361-370
Jyotsna Kumar Mandal , Parthajit Roy
This paper proposed a novel variation of spectral clustering model based on a novel affinitymetric that considers the distribution of the neighboring points to learn the underlayingstructures in the data set. Proposed affinity metric is calculated using Mahalanobis distancethat exploits the concept of outlier detection for identifying the neighborhoods of the datapoints. RandomWalk Laplacian of the representative graph and its spectra has been consideredfor the clustering purpose and the first k number of eigenvectors have been consideredin the second phase of clustering. The model has been tested with benchmark data and thequality of the output of the proposed model has been tested in various clustering indicesscales.
Volume: 5
Issue: 2
Page: 361-370
Publish at: 2015-04-01
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