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29,061 Article Results

Design and Investigation of Outer Rotor Permanent Magnet Flux Switching Machine for Downhole Application

10.11591/ijpeds.v8.i1.pp231-238
Rajesh Kumar , Erwan Sulaiman , Mahyuzie Jenal , Laili Iwani Jusoh , Fatihah Shafiqah Bahrim
Permanent magnet flux switching machine (PMFSM) is a joint venture of switch reluctance machine (SRM) and permanent magnet synchronous machine (PMSM). It has become a prominent research topic for various applications because of robust rotor structure, high torque and power densities but few were developed for downhole applications mainly due to harsh environmental conditions. Formerly, most of developed PMFSMs for downhole applications were mainly concentrated on inner-rotor type design, and difficult to find research work on outer-rotor configuration. Therefore, this paper introduces the design and investigation of PMFSM with outer-rotor configuration for downhole application. Primarily, the geometric topology of proposed design is described in detail. Then, the no load and load analysis are implemented in order to investigate the initial performance of the proposed design.
Volume: 8
Issue: 1
Page: 231-238
Publish at: 2017-03-01

A Review of Heuristic Global Optimization Based Artificial Neural Network Training Approahes

10.11591/ijai.v6.i1.pp26-32
D. Geraldine Bessie Amali , Dinakaran M.
Artificial Neural Networks have earned popularity in recent years because of their ability to approximate nonlinear functions. Training a neural network involves minimizing the mean square error between the target and network output. The error surface is nonconvex and highly multimodal. Finding the minimum of a multimodal function is a NP complete problem and cannot be solved completely. Thus application of heuristic global optimization algorithms that computes a good global minimum to neural network training is of interest. This paper reviews the various heuristic global optimization algorithms used for training feedforward neural networks and recurrent neural networks. The training algorithms are compared in terms of the learning rate, convergence speed and accuracy of the output produced by the neural network. The paper concludes by suggesting directions for novel ANN training algorithms based on recent advances in global optimization.
Volume: 6
Issue: 1
Page: 26-32
Publish at: 2017-03-01

Experimental Comparison between Four and Six Switch Inverters Fed FLC Based Speed Sensorless IM Drives at Very Low Speed

10.11591/ijpeds.v8.i1.pp130-146
Z.M.S. Elbarbary
This paper introduces experimental comparison study between six and four switch inverter fed three phase induction motor drive system. The control strategy of the drive is based on speed sensoreless vector control using model reference adaptive system as a speed estimator. The adaptive mechanism of speed control loop depends on fuzzy logic control.  Four switch inverter conFigureurations reduces the cost of the inverter, the switching losses, the complexity of the control algorithms, interface circuits, the computation of real-time implementation, volume-compactness and reliability of the drive system. The robustness of the proposed model reference adaptive system based on four switch three-phase inverter (FSTPI) fed induction motor drive is verified experimentally at different operating conditions. Experimental work is carried using digital signal processor (DSP1103) for a 1.1 kW motor. A performance comparison of the proposed FSTP inverter fed IM drive with a conventional six switch three-phase inverter (SSTP) inverter system is also made in terms of speed response. The results show that the proposed drive system provides a fast speed response and good disturbance rejection capability. The proposed FSTP inverter fed IM drive is found quite acceptable considering its performance, cost reduction and other advantages features.
Volume: 8
Issue: 1
Page: 130-146
Publish at: 2017-03-01

Design and Development of a Wind Turbine Emulator for Analyzing the Performance of Stand-alone Wind Energy Conversion System

10.11591/ijpeds.v8.i1.pp454-461
M.A. Bhayo , M.J.A. Aziz , N.R.N. Idris , A.H.M. Yatim
This paper describes the design and development of a Wind Turbine Emulator (WTE), which can be used to analyze and assess the performance of Wind Energy Conversion System (WECS). The mathematical modeling of the WTE has been done using MATLAB/Simulink platform.  A separately excited DC motor is deployed in order to reproduce the speed/torque, replacing the real wind turbine rotor. The half-bridge DC-DC power converter is developed to run the DC motor in a controlled fashion. Two PI controllers viz speed and current controller are employed which guarantee that the DC motor is following the theoretical (reference) rotational speed of the turbine rotor. A user interface is created in ControlDesk Next Generation, through which the input parameters of the WTE can be altered in real time and the instantaneous effect can be observed by analyzing the output parameters. The designed system offers wide range flexibility and provides a friendly environment in which wind speed and turbine parameters can be altered easily. Hence, offering user to conduct research on variable wind speeds. The DS1104 R&D controller board is employed for implementation of the developed Simulink model. The system design, the model used, and obtained results are presented in this paper. 
Volume: 8
Issue: 1
Page: 454-461
Publish at: 2017-03-01

Bandwidth Enhancement of Metamaterial Loaded Microstrip Antenna using Double Layered Substrate

10.11591/ijeecs.v5.i3.pp661-665
V. Srinivasa Rao , K.V.V.S. Reddy , A.M. Prasad
Communication has become a key aspect of our daily life, becoming increasingly portable and mobile. This would need the use of micro strip antennas. The rapid growth has led to the need of antennas with smaller size, increased bandwidth and high gain. In this paper, a new version of micro strip patch antenna is designed by adopting double layered substrate concept and adding a layer of metamaterial structure to a square micro strip antenna. The antenna properties gain, return loss and bandwidth are studied to achieve better performance. The designed patch antenna has an improved bandwidth of 60% at a resonant frequency of 2.47 GHz. This antenna is designed and simulated by using HFSS software.
Volume: 5
Issue: 3
Page: 661-665
Publish at: 2017-03-01

Transient and Steady State Analysis of Modified Three Phase Multilevel Inverter for Photovoltaic System

10.11591/ijpeds.v8.i1.pp31-39
M. Venkatesan , R. Rajeswari , M. Kaliyamoorthy , M. Srithar
The transient and steady state analysis of Modified Three Phase Multilevel Inverter (MMLI) for Photovoltaic (PV) system fed from single DC input is presented in this paper. The transient and Steady state conditions of modified three phase multilevel inverter are analyzed using Proportional Integral (PI) and Fuzzy Logic Controller (FLC) with change in irradiance level of PV panels. The three phase multilevel inverter  is designed with reduce number of power semiconductor switches, components, single DC input and effectively controlled by using Space Vector Pulse width Modulation technique (SVPWM).  The obtained results are validated using MATLAB/ Simulink.Finaly, semiconductor switches and componets utilization of MMLI is compared with other similar topologies.
Volume: 8
Issue: 1
Page: 31-39
Publish at: 2017-03-01

New Strategy Control of Bidirectional Quazi Z Source Inverter with Batteries and Supercapacitors Energy Storage in Grid Connected Photovoltaic System

10.11591/ijpeds.v8.i1.pp335-343
Boukebbous Seif eddine , Kerdoun Djallel
In this paper, a control of bidirectional Quasi-Z-Source Inverter (qZSI) with energy storage (batteries and supercapacitors) for photovoltaic power generation systems is presented. The quasi-Z-source inverter (qZSI) provides an alternative for the conventional two stages DC-DC/DC-AC photovoltaic (PV) based inverter system. The batteries and supercapacitors are used for compensate the necessitate power occurred in internal or external system parameters circumstances.  The main objective of this study is to propose a suitable active and reactive power control for injecting or recovering   the power between the electrical grid and PV system (batteries). For adjust the problem of rapid variation of climatic and the power grid conditions, the supercapacitors are controlled with buck-boost converter.  Many simulation results obtained using MATLAB/SIMULINK in different rigorous situations show the performance of the proposed system.
Volume: 8
Issue: 1
Page: 335-343
Publish at: 2017-03-01

Analysis of Permanent Magnet Demagnetization Effect Outer-rotor Hybrid Excitation Flux Switching Motor

10.11591/ijpeds.v8.i1.pp255-261
M. Z. Ahmad , E. Sulaiman , S.K. Rahimi , G. M. Romalan , M. Jenal
This paper addresses the irreversible permanent magnet (PM) demagnetization analysis of hybrid excitation flux switching motor (HEFSM) with outer-rotor configuration. PM demagnetization cause the PM strength used in the motor significantly reduces and hence contributes less torque performance. The study is focused on thermal analysis and conducted at various temperature up to as high as 180 degrees Celsius which has a tendency to be demagnetized. Therefore, PM demagnetization is among a critical issue and influences the choice of the applied motor. The analysis is carried out based on finite element method (FEM) and percentage of PM demagnetization is then calculated. Finally, based on simulated and calculated results the final design outer-rotor HEFSM has only 0.85 percent PM demagnetization at very high temperature and obviously the is no PM demagnetization at normal operating conditions.
Volume: 8
Issue: 1
Page: 255-261
Publish at: 2017-03-01

A Low Power, Low Noise Amplifier for Recording Neural Signals

10.11591/ijai.v6.i1.pp18-25
G. Deepika , K.S. Rao
The design of a low power amplifier for recording EEG signals is presented. The low noise design techniques are used in this design to achieve low input referred noise that is near the theoretical limit of any amplifier using a differential pair as input stage. To record the neural spikes or local field potentials (LFP’s) the amplifier’s bandwidth can be adjusted. In order to reject common-mode and power supply noise differential input pair need to be included in the design. The amplifier achieved a gain of 53.7dB with a band width of 0.5Hz to1.1 kHz and input referred noise measured as 357 nVrms operated with a supply voltage of 1.0V. The total power consumed is around 3.19µW. When configured to record neural signals the gain measured is 54.3 dB for a bandwidth of 100 Hz and the input referred noise is 1.04µ Vrms. The amplifier was implemented in 180nm technology and simulated using Cadence Virtuoso.
Volume: 6
Issue: 1
Page: 18-25
Publish at: 2017-03-01

Design and Implementation of Pulse Width Modulation Using Hardware/Software MicroBlaze Soft-Core

10.11591/ijpeds.v8.i1.pp167-175
A. Zemmouri , R. Elgouri , M. Alareqi , M. Benbrahim , L. Hlou
This paper presents an embedded control application of clock frequency to control the pulse width of the output signals, implemented on field programmable get array. This control allows the creation of lines of Pulse-width modulation depending on the numbers of card outputs, without using   the specific "Timers /Counters" blocks; this method is effective to adjust the amount of power supplied to an electrical charge. The purpose of this work is to achieve a real time hardware implementation with higher performance in both size and speed. Performance of these design implemented in field programmable get array virtex5 card, and Signals displayed on an oscilloscope.
Volume: 8
Issue: 1
Page: 167-175
Publish at: 2017-03-01

A Fuzzy Ga Based STATCOM for Power Quality Improvement

10.11591/ijpeds.v8.i1.pp483-491
S. Deepa , S. Praba , V. Deepalakshmi , L. Jayaprakash , M. Manimurugan
This paper deals with various power issues such as voltage sag, swell, harmonics, and surges using static synchronous compensator (STATCOM).The conventional controller suffers from uncertain parameters and non-linear qualities. However they are computationally inefficient extending to optimize the fuzzy controller (FC) parameters, since they exhaustively search the optimal values to optimize the objective functions. To overcome this drawback, a genetic algorithm (GA) based Fuzzy controller parameter optimization is presented in this paper. The GA algorithm is used to find the optimal fuzzy parameters for minimizing the objective functions. The feasibility of the proposed GA technique for distribution systems to improve the sag and total harmonic distortion (THD) as major power quality indices in sensitive loads at fault conditions has been simulated and tested. Therefore, the multi-objective optimization algorithm is considered in order to attain a better performance in solving the related problems.
Volume: 8
Issue: 1
Page: 483-491
Publish at: 2017-03-01

An Improved Approach to Design A Photovoltaic Panel

10.11591/ijeecs.v5.i3.pp515-520
Murari Lal Azad , Pradip Kumar Sadhu , Soumya Das , Biplab Satpati , Anagh Gupta , P Arvind , Riya Biswas
In this paper, modeling and simulation of the solar photo-voltaic (PV) power generator is observed using Matlab-Simulink environment. The study the fore-mentioned photovoltaic systems in an efficient manner the knowledge of I-V and P-V characteristics is a prerequisite. Effect of environmental parameters of temperature and irradiance variations could also be observed from simulated characteristics.
Volume: 5
Issue: 3
Page: 515-520
Publish at: 2017-03-01

A Modified Dual Input DC-DC Converter for Hybrid Energy Application

10.11591/ijpeds.v8.i1.pp81-92
Sivaprasad Athikkal , Kumaravel Sundaramoorthy , Ashok Sankar
Power electronic interface has reached a new level in the area of  hybrid energy integration nowadays. The existence for the concept of  hybrid energy integration is truly questionable without a proper power electronic interface. In this paper, a modified dual input DC-DC converter which is capable of incorporating two distinct V-I characteristic sources such as solar-PV, battery, fuel cell, etc., is proposed. The converter has the ability to operate in both unidirectional and bidirectional mode with buck, buck-boost and boost operation. The software simulation of the proposed converter has been conducted in MATLAB/Simulink platform in a detailed manner and an experimental prototype of the propsed converter has been built to validate the simulation results.
Volume: 8
Issue: 1
Page: 81-92
Publish at: 2017-03-01

Experimental Verification of the main MPPT techniques for photovoltaic system

10.11591/ijpeds.v8.i1.pp384-391
Mohamed Amine Abdourraziq , Mohamed Maaroufi
Photovoltaic (PV) technology is one of the important renewable energy resources as it is pollution free and clean. PV systems have a high cost of energy and low eciency, consequently, they not made it fully attractive as an alternative option for electricity users. It is essential that PV systems are operated to extract the maximum possible power at all times. Maximum Power Point (MPP) changes with atmospheric conditions (radiation and temperature), it is dicult to sustain MPP at all atmospheric levels. Many Maximum Power Point Tracking (MPPT) have been developed and implemented. These methods varied according to several aspects such as a number of sensors used, complexity, accuracy, speed, ease of hardware implementation, cost and tracking eciency. The MPPT techniques presented in the literature indicate that Variable step size of Perturb & Observe (VP&O), Variable step size of Incremental Conductance (VINC) and Perturb & Observe (P&O) using Fuzzy Logic Controller (FLC) can achieve reliable global MPPT with low cost and complexity and be easily adapted to dierent PV systems. In this paper, we established theoretical and experimental verication of the main MPPT controllers (VP&O, VINC, and P&O using FLC MPPT algorithms) that most cited in the literature. The three MPPT controller has been tested by MATLAB/Simulink to analyze each technique under dierent atmospheric conditions. The experimental results show that the performance of VINC and P&O using FLC is better than VP&O in term of response time.
Volume: 8
Issue: 1
Page: 384-391
Publish at: 2017-03-01

Modeling & Analysis of a Novel Adaptive Hysteresis Band Controller for Boost and Buck Converter

10.11591/ijpeds.v8.i1.pp305-315
Tanmoy Roy Choudhury , Byamakesh Nayak
In this paper, a new topology of Adaptive Hysteresis Band controller for Boost & Buck converter has been proposed, modeled and analyzed.  The difficulties caused in Hysteresis Band (HB) controlled dc-dc converter have been eliminated using Adaptive Hysteresis Band (AHB) controller. This novel control topology can be able to maintain the switching frequency constant unlike HB controller. Thus the filter design for the converters will become easier with this controller. Again this control methodology is a robust one as it depends upon the system parameters where there was no possibility with HB controller. The Mathematical modeling of the controller is shown in this paper, further this has been simulated using Matlab /SIMULINK to generate pulse. The steady state analysis to find the parameters and the stability condition of the converter using the dynamic behavior is also portrayed in this paper. The simulation for a Boost and a Buck converter is also shown separately using AHB controller.
Volume: 8
Issue: 1
Page: 305-315
Publish at: 2017-03-01
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