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27,404 Article Results

Vibration Analysis of Industrial Drive for Broken Bearing Detection Using Probabilistic Wavelet Neural Network

10.11591/ijpeds.v5.i4.pp541-551
K. Jayakumar , S. Thangavel
A reliable monitoring of industrial drives plays a vital role to prevent from the performance degradation of machinery. Today’s fault detection system mechanism uses wavelet transform for proper detection of faults, however it required more attention on detecting higher fault rates with lower execution time. Existence of faults on industrial drives leads to higher current flow rate and the broken bearing detected system determined the number of unhealthy bearings but need to develop a faster system with constant frequency domain. Vibration data acquisition was used in our proposed work to detect broken bearing faults in induction machine. To generate an effective fault detection of industrial drives, Biorthogonal Posterior Vibration Signal-Data Probabilistic Wavelet Neural Network (BPPVS-WNN) system was proposed in this paper. This system was focused to reducing the current flow and to identify faults with lesser execution time with harmonic values obtained through fifth derivative. Initially, the construction of Biorthogonal vibration signal-data based wavelet transform in BPPVS-WNN system localizes the time and frequency domain. The Biorthogonal wavelet approximates the broken bearing using double scaling and factor, identifies the transient disturbance due to fault on induction motor through approximate coefficients and detailed coefficient. Posterior Probabilistic Neural Network detects the final level of faults using the detailed coefficient till fifth derivative and the results obtained through it at a faster rate at constant frequency signal on the industrial drive. Experiment through the Simulink tool detects the healthy and unhealthy motor on measuring parametric factors such as fault detection rate based on time, current flow rate and execution time.
Volume: 5
Issue: 4
Page: 541-551
Publish at: 2015-04-01

Three-Level DTC Based on Fuzzy Logic and Neural Network of Sensorless DSSM Using Extended Kalman Filter

10.11591/ijpeds.v5.i4.pp453-463
Elakhdar Benyoussef , Abdelkader Meroufel , Said Barkat
This paper presents a direct torque control is applied for salient-pole double star synchronous machine without mechanical speed and stator flux linkage sensors. The estimation is performed using the extended Kalman filter known by it is ability to process noisy discrete measurements. Two control approaches using fuzzy logic DTC, and neural network DTC are proposed and compared. The validity of the proposed controls scheme is verified by simulation tests of a double star synchronous machine. The stator flux, torque, and speed are determined and compared in the above techniques. Simulation results presented in this paper highlight the improvements produced by the proposed control method based on the extended Kalman filter under various operation conditions.
Volume: 5
Issue: 4
Page: 453-463
Publish at: 2015-04-01

Bearingless Permanent Magnet Synchronous Motor using Independent Control

10.11591/ijpeds.v6.i2.pp233-241
Normaisharah Mamat , Kasrul Abdul Karim , Zulkiflie Ibrahim , Tole Sutikno , Siti Azura Ahmad Tarusan , Auzani Jidin
Bearingless permanent magnet synchronous motor (BPMSM) combines the characteristic of the conventional permanent magent synchronous motor and magnetic bearing in one electric motor. BPMSM is a kind of high performance motor due to having both advantages of PMSM and magnetic bearing with simple structure, high efficiency, and reasonable cost. The research on BPMSM is to design and analyse BPMSM by using Maxwell 2-Dimensional of ANSYS Finite Element Method (FEM). Independent suspension force model and bearingless PMSM model are developed by using the method of suspension force. Then, the mathematical model of electromagnetic torque and radial suspension force has been developed by using Matlab/Simulink. The relation between force, current, distance and other parameter are determined. This research covered the principle of suspension force, the mathematical model, FEM analysis and digital control system of bearingless PMSM. This kind of motor is widely used in high speed application such as compressors, pumps and turbines.
Volume: 6
Issue: 2
Page: 233-241
Publish at: 2015-03-21

Effect of Parametric Variations and Voltage Unbalance on Adaptive Speed Estimation Schemes for Speed Sensorless Induction Motor Drives

10.11591/ijpeds.v6.i1.pp77-85
Mohan Krishna. S , Febin Daya. J.L
Speed Estimation without speed sensors is a complex phenomenon and is overly dependent on the machine parameters. It is all the more significant during low speed or near zero speed operation. There are several approaches to speed estimation of an induction motor. Eventually, they can be classified into two types, namely, estimation based on the machine model and estimation based on magnetic saliency and air gap space harmonics. This paper analyses the effect of incorrect setting of parameters like the stator resistance, rotor time constant, load torque variations and also Voltage unbalance on various adaptive control based speed estimation techniques fed from the machine model. It also shows how the convergence mechanisms of the adaptation schemes are affected during these conditions. The equivalent models are built and simulated offline using MATLAB/SIMULINK blocksets and the results are analysed.
Volume: 6
Issue: 1
Page: 77-85
Publish at: 2015-03-01

Modified Single Stage AC-AC Converter

10.11591/ijpeds.v6.i1.pp1-9
Derick Mathew , Athira P Ashok , Bincy M Mathew
The paper describes the single stage AC-AC converter. This converter is a good alternative to quasi direct back to back converter. This single stage converter is called Matrix Converter. Matrix converter is an array of controlled semiconductor switches that connects three phase source to the three phase load. This converter provides bidirectional power flow, sinusoidal input and output waveforms and they have no dc link storage elements. Simulation model and results presented showing Venturini control method of matrix converter.
Volume: 6
Issue: 1
Page: 1-9
Publish at: 2015-03-01

Leakage Current Paths in PV Transformer-Less Single-Phase Inverter Topology and Its Mitigation through PWM for Switching

10.11591/ijpeds.v6.i1.pp148-159
M. N. H. Khan , K. J. Ahmad , S. Khan , M. Hasanuzzaman
The Photovoltaic (PV) is a part and parcel and well known for cost-effective and easy to operatefeatures when it is used with transformer-less inverter-based grid-tied distribution generation systems. It reduces the leakage current issue that actually occurs making paths from PV penal to ground. In this paper has been addressed this issue as main problem for reducing leakage current. Moreover, here iscompared the proposed topology’s results to AC and DC-based transformer-less topologies. The possibilities of larger number of leakage current paths indicatepower loss, which is the focus of work in this paper for different switching conditions. The results on leakage current paths using PSpice with different parasitic capacitance values from inverters of different topologies are compared with the simulation results of the topology proposed in this paper.
Volume: 6
Issue: 1
Page: 148-159
Publish at: 2015-03-01

Analysis of Binary DC Source Reduced Switch 7-level Inverter

10.11591/ijpeds.v6.i1.pp70-76
V. Arun , B. Shanthi , M. Arumugam
This paper proposes a binary DC source reduced switch 7-level inverter. Binary DC source reduced switch inverter is triggered by the Unipolar PWM strategy having sinusoidal and trapezoidal reference with triangular carriers. These Pulse Width Modulating (PWM) strategies include Phase Disposition (PD), Alternate Phase Opposition Disposition (APOD), Carrier Overlapping (CO). Performance factors like Total Harmonic Distortion (THD), VRMS (fundamental) and crest factor are evaluated for various modulation indices. Simulations were performed using MATLAB-SIMULINK. It is observed that UPDPWM strategy with trapezoidal reference provides output with relatively low distortion and UCOPWM strategy with trapezoidal reference provides relatively higher fundamental RMS output voltage.
Volume: 6
Issue: 1
Page: 70-76
Publish at: 2015-03-01

Web Based Automated Smart House Management

https://ijeecs.iaescore.com/index.php/IJEECS/article/view/4229
Navya Navya , Ganesh Dumala
A Home automation refers to control appliances around the home. These appliances can include lights, fans and other electronic devices. Instead of using GSM and ZIGBEE modules use a simple system to reduce complexity. Here the proposed system uses web server using microcontroller. The proposed system gives users an effective and easy way of controlling the various home appliances from a remote location i.e. without physically being present at home. This system can control the fans and lights. Microcontroller is used to acquire data from different types of sensors. It can monitor the appliances from anywhere with the help of web page. DOI: http://dx.doi.org/10.11591/telkomnika.v13i3.7173 
Volume: 13
Issue: 3
Page: 493-496
Publish at: 2015-03-01

Post Disaster Illumination for Underground Mines

https://ijeecs.iaescore.com/index.php/IJEECS/article/view/4221
Vamsi Krishna S , Nitai Pal , Pradip Kumar Sadhu
Lighting systems provide mine workers improved visibility and contribute to improved safety, productivity, and morale. Lighting is critical to miners, since they depend heavily on visual cues to spot fall of ground, pinning & striking and slipping & tripping hazards. Most conventional systems of lighting are used in mines are extracting a lots of power and deal with major maintenance problems. Apart from the conventional grid-power lighting systems, additional emergency lighting system using green energy is mandatory in case of grid-power failure or in disaster situation of the underground mines. The luminous efficacy increases with switching frequency while providing eye comfort to user. Even though CFL has low power consumption for solar photovoltaic (SPV) power system, but CFL’s electrical requirements are not easily met by hard-switched inverters due to their higher switching losses at higher frequencies and preheat and ignition voltage of CFL results lower efficiency. This paper demands well suited high frequency inverter and a series interrupting type charge controller for illumination at remote areas. DOI:  http://dx.doi.org/10.11591/telkomnika.v13i3.7069 
Volume: 13
Issue: 3
Page: 425-430
Publish at: 2015-03-01

A Novel Neuro-Fuzzy Controller for Multilevel Renewable Energy System

10.11591/ijai.v4.i1.pp20-28
T PAVAN KUMAR , B N KARTHEEK
Recently, Development and the utilization of single phase based multilevel inverters has been increased. This paper proposes concept based new topology based seven level inverter with less number of power electronics switches with utility grid connection. This proposed multilevel inverter operates with only eight power electronics switches at their fundamental frequency. This inverter produces seven level output from the input here we considered as a photovoltaic system. The cost, complexity, switching losses are small due to because of usage of less number of switches. The DC/DC converter receives input from which the three positive output voltages are generated and the multilevel inverter performs as a polarity reversal that provides both the positive and negative cycle output. For further enhancement in the output waveform, the filter circuit can be integrated in the output terminal of the multilevel inverter. This paper also proposed a concept of a neuro-fuzzy controller for controlling the seven level inverter. The simulation results are observed by means of MATLAB simulink toolbox.
Volume: 4
Issue: 1
Page: 20-28
Publish at: 2015-03-01

A New Control Method for Grid-Connected PV System Based on Quasi-Z-Source Cascaded Multilevel Inverter Using Evolutionary Algorithm

10.11591/ijpeds.v6.i1.pp109-120
Hamid Reza Mohammadi , Ali Akhavan
In this paper, a new control method for quasi-Z-source cascaded multilevel inverter based grid-connected photovoltaic (PV) system is proposed. The proposed method is capable of boosting the PV array voltage to a higher level and solves the imbalance problem of DC-link voltage in traditional cascaded H-bridge inverters. The proposed control system adjusts the grid injected current in phase with the grid voltage and achieves independent maximum power point tracking (MPPT) for the separate PV arrays. To achieve these goals, the proportional-integral (PI) controllers are employed for each module. For achieving the best performance, this paper presents an optimum approach to design the controller parameters using particle swarm optimization (PSO). The primary design goal is to obtain good response by minimizing the integral absolute error. Also, the transient response is guaranteed by minimizing the overshoot, settling time and rise time of the system response. The effectiveness of the new proposed control method has been verified through simulation studies based on a seven level quasi-Z-Source cascaded multilevel inverter.
Volume: 6
Issue: 1
Page: 109-120
Publish at: 2015-03-01

Development of Fertilizer Selection using Knowledge Management System

https://ijeecs.iaescore.com/index.php/IJEECS/article/view/4240
Yessy Yanitasari , Irman Hermadi , Wisnu Ananta Kusuma
Fertilizer is a chemical substance or organism that has the role in supplying the nutrient substance to the plants directly or indirectly added to the soil in order for the plant to ordinary grow.  Much information on fertilizer is available on the internet, however the existence is still widely spread. Therefore, a forum to especially accommodate fertilizer selection using knowledge management system (KMS) is needed. In this research on fertilizer selection using knowledge management system is developed using the KMS Life Cycle (KMSLC) method, and implemented using Web based application. The knowledge in this system is obtained from expert explicit data entry and uploaded file from the users that has to be validated by an expert. The expert validation process is carried out with approval system, communication through messages and conversation. The outcome of the research is a web based application that was tried out by the users with good average tested value. DOI:  http://dx.doi.org/10.11591/telkomnika.v13i3.7224 
Volume: 13
Issue: 3
Page: 574-583
Publish at: 2015-03-01

A Comparison Between Two Average Modelling Techniques of AC-AC Power Converters

10.11591/ijpeds.v6.i1.pp32-44
Pawel Szczesniak
In this paper, a comparative evaluation of two modelling tools for switching AC-AC power converters is presented. Both of them are based on average modelling techniques. The first approach is based on the circuit averaging technique and consists in the topological manipulations, applied to a converters states. The second approach makes use of state-space averaged model of the converter and is based on analytical manipulations using the different state representations of a converter. The two modelling techniques are applied to a same AC-AC converter called matrix-reactance frequency converter based on buck-boost topology. These techniques are compared on the basis of their rapidity, quantity of calculations and transformations and its limitations.
Volume: 6
Issue: 1
Page: 32-44
Publish at: 2015-03-01

Optimal Planning of an Off-grid Electricity Generation with Renewable Energy Resources using the HOMER Software

10.11591/ijpeds.v6.i1.pp137-147
Hossein Shahinzadeh , Gevork B. Gharehpetian , S. Hamid Fathi , Sayed Mohsen Nasr-Azadani
In recent years, several factors such as environmental pollution which is caused by fossil fuels and various diseases caused by them from one hand and concerns about the dwindling fossil fuels and price fluctuation of the products and resulting effects of these fluctuations in the economy from other hand has led most countries to seek alternative energy sources for fossil fuel supplies. Such a way that in 2006, about 18% of the consumed energy of the world is obtained through renewable energies. Iran is among the countries that are geographically located in hot and dry areas and has the most sun exposure in different months of the year. Except in the coasts of Caspian Sea, the percentage of sunny days throughout the year is between 63 to 98 percent in Iran. On the other hand, there are dispersed and remote areas and loads far from national grid which is impossible to provide electrical energy for them through transmission from national grid, therefore, for such cases the renewable energy technologies could be used to solve the problem and provide the energy. In this paper, technical and economic feasibility for the use of renewable energies for independent systems of the grid for a dispersed load in the area on the outskirts of Isfahan (Sepahan) with the maximum energy consumption of 3Kwh in a day is studied and presented. In addition, the HOMER simulation software is used as the optimization tool.
Volume: 6
Issue: 1
Page: 137-147
Publish at: 2015-03-01

Modeling and Simulation of Off-Grid Power Generation System Using Photovoltaic

https://ijeecs.iaescore.com/index.php/IJEECS/article/view/4220
Himanshu Sharma , Nitai Pal , Pradip Kumar Sadhu
Off-Grid is a part of the power distribution system which uses renewable energy based of power generation connected to the grid system. Multi energy power generation is composed of renewable energy systems including photovoltaic, wind turbine, energy storage and local loads. Test bed of an Off-Grid system is the technique to ensure stable operation during faults and various network disturbances in grid and islanding connected mode. In this paper the Off-Grid using renewable energy consist of a 3 kW photovoltaic, with 30 pieces of 12V, DC/DC converter, charge controller for battery, single phase DC/AC inverter and  various loads (resistor, capacitor, inductor) are develop. The AC buses 240V voltage include with isolation transformer to simulate the grid voltage level by Matlab/Simulink software. DOI: http://dx.doi.org/10.11591/telkomnika.v13i3.7061 
Volume: 13
Issue: 3
Page: 418-424
Publish at: 2015-03-01
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