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28,188 Article Results

Performance Analysis of a DTC and SVM Based Field-Orientation Control Induction Motor Drive

10.11591/ijpeds.v5.i3.pp336-343
Md. Rashedul Islam , Md. Maruful Islam , Md. Kamal Hossain , Pintu Kumar Sadhu
This study presents a performance analysis of two most popular control strategies for Induction Motor (IM) drives: direct torque control (DTC) and space vector modulation (SVM) strategies. The performance analysis is done by applying field-orientation control (FOC) technique because of its good dynamic response. The theoretical principle, simulation results are discussed to study the dynamic performances of the drive system for individual control strategies using actual parameters of induction motor. A closed loop PI controller scheme has been used. The main purpose of this study is to minimize ripple in torque response curve and to achieve quick speed response as well as to investigate the condition for optimum performance of induction motor drive. Depending on the simulation results this study also presents a detailed comparison between direct torque control and space vector modulation based field-orientation control method for the induction motor drive.
Volume: 5
Issue: 3
Page: 336-343
Publish at: 2015-02-01

A Tactical Chaos based PWM Technique for Distortion Restraint and Power Spectrum Shaping in Induction Motor Drives

10.11591/ijpeds.v5.i3.pp383-392
V. Mohan , N. Stalin , S. Jeevananthan
The pulse width modulated voltage source inverters (PWM-VSI) dominate in the modern industrial environment. The conventional PWM methods are designed to have higher fundamental voltage, easy filtering and reduced total harmonic distortion (THD). There are number of clustered harmonics around the multiples of switching frequency in the output of conventional sinusoidal pulse width modulation (SPWM) and space vector pulse width modulation (SVPWM) inverters. This is due to their fixed switching frequency while the variable switching frequency makes the filtering very complex. Random carrier PWM (RCPWM) methods are the host of PWM methods, which use randomized carrier frequency and result in a harmonic profile with well distributed harmonic power (no harmonic possesses significant magnitude and hence no filtering is required). This paper proposes a chaos-based PWM (CPWM) strategy, which utilizes a chaotically changing switching frequency to spread the harmonics continuously to a wideband and to reduce the peak harmonics to a great extent. This can be an effective way to suppress the current harmonics and torque ripple in induction motor drives. The proposed CPWM scheme is simulated using MATLAB / SIMULINK software and implemented in three phase voltage source inverter (VSI) using field programmable gate array (FPGA).
Volume: 5
Issue: 3
Page: 383-392
Publish at: 2015-02-01

FPGA-Based Implementation Direct Torque Control of Induction Motor

10.11591/ijpeds.v5.i3.pp293-304
Saber Krim , Soufien Gdaim , Abdellatif Mtibaa , Mohamed Faouzi Mimouni
This paper proposes a digital implementation of the direct torque control (DTC) of an Induction Motor (IM) with an observation strategy on the Field Programmable Gate Array (FPGA). The hardware solution based on the FPGA is caracterised by fast processing speed due to the parallel processing. In this study the FPGA is used to overcome the limitation of the software solutions (Digital Signal Processor (DSP) and Microcontroller). Also, the DTC of IM has many drawbacks such as for example; The open loop pure integration has from the problems of integration especially at the low speed and the variation of the stator resistance due to the temperature. To tackle these problems we use the Sliding Mode Observer (SMO). This observer is used estimate the stator flux, the stator current and the stator resistance. The hardware implementation method is based on Xilinx System Generator (XSG) which a modeling tool developed by Xilinx for the design of implemented systems on FPGA; from the design of the DTC with SMO from XSG we can automatically generate the VHDL code. The model of the DTC with SMO has been designed and simulated using XSG blocks, synthesized with Xilinx ISE 12.4 tool and implemented on Xilinx Virtex-V FPGA.
Volume: 5
Issue: 3
Page: 293-304
Publish at: 2015-02-01

Robust SINS/GNSS Integration Method for High Dynamic Applications

https://ijeecs.iaescore.com/index.php/IJEECS/article/view/4206
Falin Wu , Hengyang Zhao , Yan Zhao , Haibo Zhong
As high dynamic movement is always accompanied by colored noise which lacks of mathematical model, traditional Kalman filtering based on an assumption of white Gaussian noise always faces serious divergence. To enhance the performance in high dynamic environment with uncertain colored noise, a kind of robust filtering based on H-infinity technology isdeveloped. State model of the algorithm is derived from SINS error propagation. Both position and velocity errorsare used as the measurements. A simulation system which includes a tri-axial turntable and a GNSS signal simulator is used to verify the integration design under high dynamic environment. Simulation results proved that both the accuracy and robustness of the integration design have been improved significantly.DOI: http://dx.doi.org/10.11591/telkomnika.v13i2.6876 
Volume: 13
Issue: 2
Page: 292-299
Publish at: 2015-02-01

A Novel Approach of Position Estimation and Power Factor Corrector Converter Fed BLDC Motor

10.11591/ijpeds.v5.i3.pp415-423
S. Kaliappan , R. Rajeswari
This paper proposes a Power factor Corrected (PFC) Bridgeless Buck-Boost converter fed BLDC motor drive. The Bridgeless configuration eliminates the Diode Bridge Rectifier in order to reduce the number of components and the conduction loss. The position sensors used in BLDC drives have drawbacks of additional cost, mechanical alignment problems. These bottle necks results in sensorless technique. The Sensorless technique mostly relies on measurement of Back EMF to determine relative positions of stator and rotor for the correct coil energising sequence can be implemented. This paper introduces the offline Finite Element method for sensorless operation. The proposed sensorless scheme estimates the motor position at standstill and running condition. The obtained Power Factor is within the acceptable limits IEC 61000-3-2. The proposed drive is simulated in MATLAB/Simulink the obtained results are validated experimentally on a developed prototype of the drive.
Volume: 5
Issue: 3
Page: 415-423
Publish at: 2015-02-01

Analysis of Variable Speed PFC Chopper Fed BLDC Motor Drive

10.11591/ijpeds.v5.i3.pp326-335
A Jeya Selvan Renius , K Vinoth Kumar
This paper provides the detailed analysis of the DC-DC chopper fed Brushless DC motor drive used for low-power applications. The various methods used to improve the power quality at the ac mains with lesser number of components are discussed. The most effective method of power quality improvement is also simulated using MATLAB Simulink. Improved method of speed control by controlling the dc link voltage of Voltage Source Inverter is also discussed with reduced switching losses. The continuous and discontinuous modes of operation of the converters are also discussed based on the improvement in power quality. The performance of the most effective solution is simulated in MATLAB Simulink environment and the obtained results are presented.
Volume: 5
Issue: 3
Page: 326-335
Publish at: 2015-02-01

Design and Analysis of Drive System with Slip Ring Induction Motor for Electric Traction in India

10.11591/ijpeds.v5.i3.pp374-382
Nagamani Chandra sekara , Somanatham R , Chaitanya Kumar U
The use of Squirrel Cage for Traction has revolutionised the motive power of a Locomotive. The Asynchronous Motor is rugged with high starting Torque, has a very smooth Voltage and Speed control as compared to a DC Series Motor. When looking at the Traction perspective, a Slip Ring Induction Motor can be an alternative to the Squirrel Cage Motor as it has higher starting Torque and better efficiency than a Squirrel Cage Motor. the Slip Power Recovery scheme also plays a proactive role as ther can be substantial savings of energy in case of a Slip Ring Induction Motor. A detailed design and analysis of a Drive System with Slip Ring Induction Motor for Electric Traction is presented in this Research Paper
Volume: 5
Issue: 3
Page: 374-382
Publish at: 2015-02-01

Implementation of PI Controller for 4ф Srm Drive Using TMS320F28335

10.11591/ijpeds.v5.i3.pp283-292
Mekala N , Muniraj C
This paper presents the experimental investigation of DSP based 4Ф Switched Reluctance Motor (SRM) Drive. SRM is a doubly-salient, singly-excited machine and having very simple construction, has a low inertia and allows an extremely high-speed operation. The control system of SRM is highly complex due to non linear nature. In such a system for implementing control algorithm needs high speed processor. In this work TMS320F28335 DSP processor is used to implement the inner loop PI current controller and outer loop PI speed controller. The TMS320F28335 is highly integrated, high performance solution for challenging control applications. The various experimental tests are carried out in 1 HP 4Ф SRM. The experimental results are reported in order to verify the steady state, transient and robustness performance of the controller.
Volume: 5
Issue: 3
Page: 283-292
Publish at: 2015-02-01

A New Approach to Linear Estimation Problem in Multi-user Massive MIMO Systems

https://ijeecs.iaescore.com/index.php/IJEECS/article/view/4212
Muhammad Ali Raza Anjum
A novel approach for solving linear estimation problem in multi-user massive MIMO systems is proposed. In this approach, the difficulty of matrix inversion is attributed to the incomplete definition of the dot product. The general definition of dot product implies that the columns of channel matrix are always orthogonal whereas, in practice, they may be not. If the latter information can be incorporated into dot product, then the unknowns can be directly computed from projections without inverting the channel matrix. By doing so, the proposed method is able to achieve an exact solution with a 25% reduction in computational complexity as compared to the QR method. Proposed method is stable, offers an extra flexibility of computing any single unknown, and can be implemented in just twelve lines of code. DOI:  http://dx.doi.org/10.11591/telkomnika.v13i2.7003 
Volume: 13
Issue: 2
Page: 337-351
Publish at: 2015-02-01

Dynamic Response of Two-Electrode Distributed Feedback Laser for Stable Signal Mode Operation

10.11591/ijece.v5i1.pp23-30
Hamza Bousseta , A. Zatni , A. Amghar , A. Moumen , A. Elyamani
The longitudinal spatial hole burning (LSHB) effect has been known to limit the performance of distributed feedback (DFB) semiconductor lasers to achieve a better dynamic signal mode operation (DSMO). So, in order to ensure a stable (DSMO), we propose a novel device design of two electrode DFB lasers with longitudinal variation in the coupling coefficient (distributed coupling coefficient (DCC)), the structure also contains a phase shifted in middle of the cavity. By means of the finite difference time domain (FDTD) numerical method, we analyze dynamic response of our structure and we also compare the results with the conventional two electrode DFB laser (TE-DFB). The numerical simulation shows that, a better dynamic signal mode has been achieved by TE-DCC-DFB lasers in comparison with TE-DFB laser due to its better and high side mode suppression ratio (SMSR). Therefore, the TE-DCC-DFB lasers will be useful to extend the transmission distance in optical fiber communication systems.
Volume: 5
Issue: 1
Page: 23-30
Publish at: 2015-02-01

Software Development of Automatic Data Collector for Bus Route Planning System

10.11591/ijece.v5i1.pp150-157
Adam Hendra Brata , Deron Liang , Sholeh Hadi Pramono
Public transportation is important issue in Taiwan. Recently, mobile application named Bus Route Planning was developed to help the user to get information about public transportation using bus. But, this application often gave the user inaccurate bus information and this application has less attractive GUI. To overcome those 2 problems, it needed 2 kinds of solutions. First, a more accurate time prediction algorithm is needed to predict the arrival time of bus. Second, augmented reality technology can be used to make a GUI improvement. In this research, Automatic Data Collector system was proposed to give support for those 2 solutions at once. This proposed system has 3 main functionalities. First, data collector function to provide some data sets that can be further analyzed as an base of time prediction algorithm. Second, data updater functions to provide the most updated bus information for used in augmented reality system. Third, data management function to gave the system better functionality to supported those 2 related systems. This proposed Automatic Data Collector system was developed using batch data processing scenario and SQL native query in Java programming language. The result of testing shown this data processing scenario was very effective to made database manipulation especially for large-sized data.
Volume: 5
Issue: 1
Page: 150-157
Publish at: 2015-02-01

Detection of Atrial Fibrillation using Autoregressive modeling

10.11591/ijece.v5i1.pp64-70
Kora Padmavathi , K.Sri Ramakrishna
A‎atrial fibrillation (AF) is the arrhythmia that commonly causes death in the adults. We measured AR coefficients using Burg’s method for each 15 second segment of ECG. These features are classified using the different statistical classifiers: kernel SVM and KNN classifier. The performance of the algorithm was evaluated on signals from MIT Physionet database.. The effect of AR model order and data length was tested on the classification results. This method shows better results can be used for practical use in the clinics.‏
Volume: 5
Issue: 1
Page: 64-70
Publish at: 2015-02-01

Impact Analysis of midpoint Connected STATCOM on Distance Relay Performance

https://ijeecs.iaescore.com/index.php/IJEECS/article/view/4201
Ilango R , Sree Renga Raja T
This paper presents the impact of the Static Synchronous Compensator (STATCOM) on the performance of distance protection of EHV transmission lines. A 400kV transmission system having midpoint connected STATCOM with its control circuit is modeled using MATLAB/SIMULINK software. The impact of STATCOM on distance relay for different fault conditions and different fault locations is analyzed. Simulation results indicate that the presence of the STATCOM in the transmission system significantly changes the line impedance seen by the distance relay to be lower or higher than the actual line impedance. Due to this the performance of the distance relay changes, either overreaches or under reaches. DOI: http://dx.doi.org/10.11591/telkomnika.v13i2.6987 
Volume: 13
Issue: 2
Page: 257-263
Publish at: 2015-02-01

Robust Synchronization of the Unified Chaotic System

10.11591/ijece.v5i1.pp102-110
Hatem Trabelsi , Mohamed Benrejeb
The paper investigates the synchronization problem of the unified chaotic system. The case of identical, but unknown master and slave unified chaotic systems is considered. Based on compound matrices formalism, a unified synchronization control scheme is proposed independently of the unknown system parameter. Simulation results are provided to show the effectiveness of the presented scheme.
Volume: 5
Issue: 1
Page: 102-110
Publish at: 2015-02-01

A Compact Multiple Band-Notched Planer Antenna with Enhanced Bandwidth Using Parasitic Strip Lumped Capacitors and DGS-Technique

https://ijeecs.iaescore.com/index.php/IJEECS/article/view/4194
Ahmed Boutejdar , Ahmed A Ibrahim , Edmund P Burte
UWB antenna with dual notched characteristics fed by microstrip transmission line is presented in this paper. The tapered connection between the rectangular patch and the feed line is used to produce a good impedance matching from 2.3 to 11.5 GHz. A dual band frequency notches are achieved using U-DGS loaded with lumped capacitors. The first notch frequency band is achieved using DGS to reduce the interference with WIMAX from 3.3 to 3.7 Ghz. The second notch frequency band is also achieved using U-parasitic strip placed in the ground plan to eliminate the interference with WLAN from 5.2 to 5.9 GHz. Lumped capacitors are combined with the slot due to miniaturize the slot size. The size of the resonator is reduced by more than 40% when lumped capacitors are used. The proposed antenna hasVSWR < 2 except the notched bands. The simulated results confirm that the antenna is suitable for UWB applications. DOI: http://dx.doi.org/10.11591/telkomnika.v13i2.6976
Volume: 13
Issue: 2
Page: 203-208
Publish at: 2015-02-01
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