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28,451 Article Results

Indirect Control of a Doubly-Fed Induction Machine for Wind Energy Conversion

https://ijpeds.iaescore.com/index.php/IJPEDS/article/view/5013
Smail Mansouri , Ali Benatillah
In this paper, a grid connected wind power generation scheme using a doubly fed induction generator ( DFIG) is studied. The aims of this paper are: The modelling and simulation of the operating in two quadrants (torque-speed ) of a DFIG, the analysis employs a stator flux vector control algorithm to control rotor current, the system enables optimal speed tracking for maximum energy capture from the wind and high performance active and reactive power regulation using the PI regulator.  The simulation calculations were achieved using MATLAB®-SIMULINK® package. Lastly, the obtained results are presented, for different operating points, illustrating the good control performances of the system.DOI: http://dx.doi.org/10.11591/ijpeds.v4i3.5944
Volume: 4
Issue: 3
Page: 400-405
Publish at: 2014-09-01

Design, Simulation and Hardware Implementation of a Multi Device Interleaved Boost Converter for Fuel Cell Applications

https://ijpeds.iaescore.com/index.php/IJPEDS/article/view/5004
R. Seyezhai
This paper presents the analysis and implementation of a two-phase  Multi Device Interleaved  Boost Converter (MDIBC).  Among the various DC-DC  topologies, Multi device Interleaved converter is considered as a better solution for fuel cell  hybrid vehicles as it reduces the  input current ripple,  output voltage ripple and the size of passive components. Detailed analysis has been done to investigate the benefits of Multi device Interleaved boost converter by comparing  it with the conventional   Interleaved boost converter topology. Moreover, in this paper, power loss analysis (switching loss, conduction loss, inductor loss) of the proposed converter has been performed. Simulation study of Multi device interleaved converter has been studied using MATLAB/SIMULINK. Hardware prototype is built to validate the results.DOI: http://dx.doi.org/10.11591/ijpeds.v4i3.5883
Volume: 4
Issue: 3
Page: 314-320
Publish at: 2014-09-01

Multimode Speed Control Based on Fuzzy Decision-Making for Automatic Train Operation

10.11591/ijeecs.v12.i9.pp6764-6770
Junnian Gou
Based on the analysis of train running process and train motor-driven models, an ATO compound control algorithm of multimode fuzzy decision making is proposed, which will improve the effects of dynamic and static control of ATO system. Control weighting coefficients of PID controller output and fuzzy controller output are obtained by fuzzy reasoning, fuzzy decision-making and dynamic calculations of error and error rate of train speed, and also the weighting coefficients are used for the output calculation of fuzzy decision-making controller. Simulation results show the speed and accuracy of ATO speed control are improved effectively by the compound  multimode decision controller algorithm, which help to  improve the comfort of trains and its stop precision.
Volume: 12
Issue: 9
Page: 6764-6770
Publish at: 2014-09-01

Simulation Research on Static and Dynamic Behavior of M-STATCOM

10.11591/ijeecs.v12.i9.pp6622-6632
Rizwan Jafri , Zha Xiaoming , S Ali
In this paper, a novel static synchronous compensator/condensor based on the state-of-the-art modular multilevel converter called M-STATCOM is introduced. In order to support bus bar voltage, maintain the stability of DC-link capacitor voltage, obtain harmonics free output voltage and compensate reactive power under unbalanced operation, a novel direct current control (DCC) technique is proposed. For high accuracy and good control system response purpose Level-shift sine pulse width modulation (LS-PWM) technique is selected as the modulation strategy. The M-STATCOM is simulated in PSCAD/EMTDC environment and its static and dynamic responses are discussed. The effectiveness and feasibility of the proposed modulation and control strategy is validated by the simulation results.
Volume: 12
Issue: 9
Page: 6622-6632
Publish at: 2014-09-01

Microcontroller Based Stator Resistance Determination of Induction Motor on Temperature Variations

https://ijpeds.iaescore.com/index.php/IJPEDS/article/view/5009
Siraj Ahmed T , Sukhdeo Sao , K.S.R Anjaneyulu
In this paper an experiment has been conducted to determine the online stator winding resistance of an induction motor, in industries as well as domestic purpose induction motors is largely utilized, as it has both applications of variable and constant torque operation nature. The major requirement of an electric drive system is its independent control of torque and speed; this is achieved in DC motor Drive but has more disadvantages. With the help of fast acting switching devices it is possible to independently control an induction motor. To control an induction motor drive various methods are available, direct torque control of induction motor is one of the best method of control compared to other, the only disadvantage is the torque ripple. Stator resistance is one of the parameter for the cause; hence its determination is essential. An experiment is conducted at various loads on an induction motor and then the temperature in the stator winding is noted at different instants using microcontroller, from the tabulated readings stator winding resistance is calculated and compared with the direct measurement by Volt-Ampere method. Further it is suggested that by implementing the actual online value of stator resistance of an induction motor dive torque ripple can be minimized. DOI: http://dx.doi.org/10.11591/ijpeds.v4i3.5649
Volume: 4
Issue: 3
Page: 356-362
Publish at: 2014-09-01

PLC Used Automation in Oil Industry for multiple Induction Motors

10.11591/ijeecs.v12.i9.pp6461-6470
Nithin T Abraham , Shaema Lizbeth Mathew , Hima S
Industrial automation is largely based on PLC-based control systems. They are used to monitor and control a plant or equipment in industries such as water and waste control, energy, oil and gas refining and transportation. Automation also increases product quality, productivity and decreases breakdown. Conventional equipments or systems are prone to errors due to involvement of humans for data collection and processing using complicated mathematical expressions. Computer integrated manufacturing, computer numerical control; robots, flexible manufacturing system, automated inspection and process control are directing the technology toward one goal, the fully automated factory of the future. Coming to Induction motors, in the conventional case due to long use of a particular induction motor in oil rig related plants more mechanical faults arise due to overheating and may lead to failure which affects production. In case of using two or more induction motors and automating the duty cycle shifting using PLC, the effectiveness of the system increases. Also in case of tripping of a particular motor, other idle motors backs up the operation thereby preventing the plant to go to standstill, hence increasing the overall plant efficiency.
Volume: 12
Issue: 9
Page: 6461-6470
Publish at: 2014-09-01

Design of a Current Starved Ring Oscillator Based VCO for Phase-Locked Loop

10.11591/ijeecs.v12.i9.pp6667-6672
Khairun Nisa’ Minhad , Zainab Kazemi , Mamun Bin IbneReaz , Jubayer Jalil , Noorfazila Kamal
A design of the proposed VCO was developed for PLL in radio frequency identification (RFID) application. By using current starved ring oscillator, the designed circuit is simulated using 0.18-μm CMOS process in Mentor Graphics environment. The results show that the voltage drawn is around 5V supplied at VDD, and the product of this current and voltage has approximate 105.3 mW power consumption while the VCO generates 212 MHz at 1.4 V.
Volume: 12
Issue: 9
Page: 6667-6672
Publish at: 2014-09-01

DSP-Based Sensorless Speed Control of a Permanent Magnet Synchronous Motor using Sliding Mode Current Observer

https://ijpeds.iaescore.com/index.php/IJPEDS/article/view/5000
Rachid Askour , Badr Bououlid Idrissi
In this paper, experimental results of 3-phase permanent magnet synchronous motor (PMSM) sensorless speed control are presented. To estimate the rotor position, a sliding mode current observer (SMCO) was implemented. This observer estimates the back emfs of the motor in the stationary reference frame using only the measured voltages and currents of the motor. These emfs were utilized to obtain the rotor position. The speed of the motor was calculated by differentiating the rotor position angle. The stability of the proposed SMCO was verified using Lyapunov method to determine the observer gain. The saturation function was adopted in order to reduce the chattering phenomenon caused by the SMCO. A vector control method was employed to achieve the sensorless drive system. The control application was developed in C/C++ language and implemented using the Texas Instruments TMS320LF2812 digital signal processor (DSP). This new processor enables intelligent control for motors. We used to test the drive the MCK2812 which is a professional development kit available from Technosoft Company. The theoretical finding is validated with experimental results that show the effectiveness of the real-time implementation.DOI: http://dx.doi.org/10.11591/ijpeds.v4i3.5704
Volume: 4
Issue: 3
Page: 281-289
Publish at: 2014-09-01

Study on Pattern Reconfiguration of Plasma Antenna Excited by Surface Wave

10.11591/ijeecs.v12.i9.pp6658-6666
Zhu Anshi , Chen Zili , Wei Jianbin , Zhen Yunhui
For the purpose of anti-jamming communications, the radiation pattern reconfiguration of plasma antenna excited by surface wave were studied. The self-consistent model used to describe the relation between the pump signal and radiation pattern is put forward by combining the Boltzmann Equation and Maxwell Equation. And the correctness of the model is validated by using FDTD approach. The experiment system that used to measure the radiation pattern is established to validate the correctness of the self-consistent model. The investigation results show that the radiation pattern are reconfigurable by controlling the pump signal.
Volume: 12
Issue: 9
Page: 6658-6666
Publish at: 2014-09-01

Insilico Identification of Potent Inhibitor from Andrographis Paniculata for ESBLs

10.11591/ijaas.v3.i3.pp151-157
Aysha NIL Mohamed , Mumtaj Peer Mohammed , Dhamotharan R
The study aimed at docking of TEM - 52 & modeled CTX – M -13 by ethanol extracted compounds from Andrographis paniculata and to predict their binding efficiency. BLAST-P was performed to retrieve suitable templates for homology-modeling using the bla CTX-M sequences obtained from Genbank.  Protein Data Bank (PDB) IDs of these templates were retrieved. Models were prepared using Swiss-Model-Server and verified by Procheck and 3D programmes RAMPAGE was used to prepare Ramachandran plots.   The 13 - Hexyl - oxa - cyclotridec - 10 - En- 2 - one was selected as ligand for this docking study from the data generated by Mass spectrometry analysis of methanol extracted compounds from Andrographis paniculata. The structure was drawn manually with aid of JME and its drug likeliness & molecular properties was calculated using Pre Admet server.  Docking was performed by using docking server. Since the docking results proved that the amino acid residues Ser70,Ser 130,Ser237,Arg 276 and Thr235 of CTX-M-13 (enzyme) make important contacts with the ligand, researchers are expected to duly utilize this information for designing more potent and CTX - M inhibitors.
Volume: 3
Issue: 3
Page: 151-157
Publish at: 2014-09-01

Inflationary Kaluza- Klien Cosmic String In Scalar-Tensor Theory Of Gravitation

10.11591/ijaas.v3.i3.pp141-150
Satish Janjeti
Abstract We have investigated a spatially homogeneous and anisotropic Kaluz-Klien space time with cosmic strings in the presence of Sen Dunn theory as source. Exact solutions of the Einstein field equations are presented via a suitable power law assumption. Some of models obey geometric strings, massive strings and Takabayasi’s equation of state .We find that the constant value of deceleration parameter is reasonable for the present day universe. Some physical and geometric behaviour of the models are also discussed.
Volume: 3
Issue: 3
Page: 141-150
Publish at: 2014-09-01

Research on the Coordination of Repeaters Distribution Based on CTCSS

10.11591/ijeecs.v12.i9.pp6884-6891
Zhangquan Wang , Zhangquan Wang
Applying repeaters and CTCSS for frequency transmission will beeasier. But how to arrange the repeaters to cover the areas and allocate the CTCSS is one of the most indispensable problems. At first, this paperestablishes the model to cover the area. According to previous study, ourapproach is to tile the region with hexagons inscribed within circles of radiusequal to the distance a user’s signal will reach effectively. Then, this paperchecks the repeaters’ usage loads whether the number of them is adequate forlarge number of users. This paper set five conditions which must be satisfied.And then report the 2 meter band which is close to the information that topichas given. This algorithm is to arrange the frequency division and allocate theCTCSS step by step.
Volume: 12
Issue: 9
Page: 6884-6891
Publish at: 2014-09-01

Neuro-Genetic Adaptive Optimal Controller for DC Motor

https://ijpeds.iaescore.com/index.php/IJPEDS/article/view/5012
Mahmoud Mohamed Elkholy , Mohammed Abd Elhameed Abd Elnaiem
Conventional speed controllers of DC motors suffer from being not adaptive, this is because of the nonlinearity in the motor model due to saturation. Structure of DC motor speed controller should vary according to its operating conditions, so that the transient performance is acceptable. In this paper an adaptive and optimal Neuro-Genetic controller is used to control a DC motor speed. GA will be used first to obtain the optimal controller parameter for each load torque and motor reference speed. The data obtained from GA is used to train a neural network; the inputs for the neural network are the load torque and the motor reference speed and the outputs are the controller parameters. This neural network is used on line to adapt the controller parameters according to operating conditions. This controller is tested with a sudden change in the operating conditions and could adapt itself for the conditions and gave an optimal transient performance.DOI: http://dx.doi.org/10.11591/ijpeds.v4i3.5750
Volume: 4
Issue: 3
Page: 393-399
Publish at: 2014-09-01

The Effects of Stacking Sequence Layers of Hybrid Composite Materials in Energy Absorption under the High Velocity Ballistic Impact Conditions – An Experimental Investigation

10.11591/ijaas.v3.i3.pp130-140
Elias Randjbaran
In the current study, the effects of stacking sequence layers of hybrid composite materials on ballistic energy absorption, which were fabricated from Kevlar, carbon, glass fibres and resin have been experimentally investigated at the high velocity ballistic impact conditions. All the samples have equal mass, shape and density, but they have different stacking sequence layers. After running the ballistic test in the same conditions, the final velocities of the bullets showed that how much energy absorbed by the samples. The energy absorption of each sample through the ballistic impact has been calculated, accordingly , the decent ballistic impact resistance materials could be found by conducting the test. This paper can be further studied in order to characterise the material properties.
Volume: 3
Issue: 3
Page: 130-140
Publish at: 2014-09-01

Total Harmonic Distortion of Dodecagonal Space Vector Modulation

https://ijpeds.iaescore.com/index.php/IJPEDS/article/view/5003
Babita Nanda
Space vector modulation technique is one of the best PWM technique which has been implemented to the Multilevel inverter circuit to get the purely sinusoidal cuurent .This is a important algorithm which is implemented in open wind induction motor.This type of I.M has great impact on Electric Drive system. SVM is nothing but the technique of switching algorithm .The Hexagonal space vector modulation has been implemented before , but elimination of higher order harmonics are not possible. Torque pulsation arises. Speed control of Induction motor was not smooth .so Dodecagonal (12) structure developed. A 12 side polygonal space vector structure is meant for eliminating (6n±1) harmonics in the phase current waveform throughout the modulating range. A high resolution of PWM technique is proposed involving multiple 12 sided polygonal (Dodecagonal) structure that can generate highly sinusoidal voltage at a reduced switching frequency. In this paper different values of frequencies have been taken for harmonic analysis. SVM method features a higher level of dc-bus voltage utilization compared to the conventional PWM.DOI: http://dx.doi.org/10.11591/ijpeds.v4i3.4279
Volume: 4
Issue: 3
Page: 308-313
Publish at: 2014-09-01
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