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International Journal of Power Electronics and Drive Systems (IJPEDS)
ISSN : -     EISSN : 20888694     DOI : -
Core Subject : Engineering,
International Journal of Power Electronics and Drive Systems (IJPEDS, ISSN: 2088-8694, a SCOPUS indexed Journal) is the official publication of the Institute of Advanced Engineering and Science (IAES). The scope of the journal includes all issues in the field of Power Electronics and drive systems. Included are techniques for advanced power semiconductor devices, control in power electronics, low and high power converters (inverters, converters, controlled and uncontrolled rectifiers), Control algorithms and techniques applied to power electronics, electromagnetic and thermal performance of electronic power converters and inverters, power quality and utility applications, renewable energy, electric machines, modelling, simulation, analysis, design and implementations of the application of power circuit components (power semiconductors, inductors, high frequency transformers, capacitors), EMI/EMC considerations, power devices and components, sensors, integration and packaging, induction motor drives, synchronous motor drives, permanent magnet motor drives, switched reluctance motor and synchronous reluctance motor drives, ASDs (adjustable speed drives), multi-phase machines and converters, applications in motor drives, electric vehicles, wind energy systems, solar, battery chargers, UPS and hybrid systems and other applications.
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Articles 12 Documents
Search results for , issue "Vol 2, No 2: June 2012" : 12 Documents clear
On Line Stator Resistance Tuning of DTC Control CSI Fed IM Drives N. Panner selvam; M. Arul Prasanna; I. Gerald Christopher raj
International Journal of Power Electronics and Drive Systems (IJPEDS) Vol 2, No 2: June 2012
Publisher : Institute of Advanced Engineering and Science

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Abstract

Current source inverter (CSI) fed drives are employed in high power applications. The conventional CSI drives suffer from drawbacks such as harmonic resonance, unstable operation at low speed ranges, and torque pulsation. CSI fed drives with Direct Torque Control (DTC) has drawn the attention of the motor drives designers because its implementation requires no position sensor. Crucial to the success of this scheme is the estimation of electromagnetic torque and stator flux linkages using the measured stator voltages and currents. The estimation is dependent only on one machine parameter, stator resistance. The variation of the stator resistance, deteriorates the performance of the drive by introducing errors in the estimated flux linkage’s magnitude and its position and hence in the electromagnetic torque. Resistance change also skews the torque linearity thus making the motor drive a less than ideal torque amplifier. Parameter compensation using stator current phasor error has been proposed in literature. To obtain the stator current phasor error, the stator current reference is required which is not usually available in direct torque control schemes. An analytical derivation of the stator current phasor reference is derived systematically from the reference electromagnetic torque and flux linkages. The error between the stator current phasor reference and its measured value is a measure of the stator resistance variation from its set value. For the first time, it is demonstrated in this paper that DTC motor drive system can become unstable when the set value of the stator resistance in the controller is higher than the stator resistance in the machine. Hence parameter adaptation is not only important for torque linearity but also for stability of the system is shown in this paper.DOI: http://dx.doi.org/10.11591/ijpeds.v2i2.332
Impact Analysis of Dwell Angles on Current Shape and Torque in Switched Reluctance Motors Syeda Fatima Ghousia
International Journal of Power Electronics and Drive Systems (IJPEDS) Vol 2, No 2: June 2012
Publisher : Institute of Advanced Engineering and Science

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Abstract

The reduction of torque ripple is the main target in research for designing a variable drive system with switched reluctance motors (SRM) for higher torque density and better efficiency. This ripple is due to the transition of excitation current between the adjacent phases. Precise control of turn-on and turn off angle is required to smooth the torque. In this paper, the effects of selecting the turn-on and turn-off angles are simulated in detail. It is observed that with the extended turn-on and turn off angles, the precise selection of turn-on and turn off angle can alter the shape of the excitation current in the stator coil and its point of overlapping with the adjacent coil. Therefore the transition between different phases can be smoothed out. The impact of this alteration on the excitation current and torque ripple as a function of different parameters of dwell angle is studied in detail in this paper. It is found that a sinusoidal current shape can also be obtained with the proper selection of these parameters.DOI: http://dx.doi.org/10.11591/ijpeds.v2i2.236
Influence of Harmonics in Laboratory due to Nonlinear Loads Risnidar Chan; Ismail Daut; Syafruddin Hasan; Norhaidar Hasim
International Journal of Power Electronics and Drive Systems (IJPEDS) Vol 2, No 2: June 2012
Publisher : Institute of Advanced Engineering and Science

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Abstract

This research was focused on the customer’s side of the meter which is the effect of harmonics on a laboratory in Electrical System Engineering School at K.Wai Perlis. Harmonic currents in equipments can cause them to experience overheating and increased losses, while harmonic voltage produces magnetic fields rotating at a speed corresponding to the harmonic frequency. This also results in equipments heating, mechanical vibrations and noise, reduced efficiency, reduced life, and voltage stress on insulation of equipment windings. The loads in this research are computers, Compact Fluorescent Lamps CFLs), Air Conditions and printers,which all of the loads are harmonic significant The instrument to measure and monitoring is Fluke 435 Power Quality Analyzer. With the operation of varying nonlinear loads, the injected harmonic current magnitudes and phase angles vary in a random way. This research offers the advantage of providing the utility a wealth of information on the effects of harmonics in their equipments. This will subsequently make them aware of the causes of increased cost and reduced efficiency that may be experienced by using these equipments. This paper describes the investigation cost of harmonic effect as THD, and harmonic energy losses cost.Keywords: harmonics, nonlinear loads, Energy losses cost, THD.DOI: http://dx.doi.org/10.11591/ijpeds.v2i2.142
A Multilevel Quasi Matrix Converter Design for SRM Drives In EV Applications Syeda Fatima Ghousia
International Journal of Power Electronics and Drive Systems (IJPEDS) Vol 2, No 2: June 2012
Publisher : Institute of Advanced Engineering and Science

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Abstract

This paper presents a novel idea of developing an absolute, general choice multilevel asymmetric power converter for switched reluctance motor (SRM) drive suitable specifically in electric vehicle applications. For SRM drives, the suitability of a particular inverter circuit changes with the motor geometry. It is in contrast to the drives operating with sinusoidal voltages and currents where the inverter topology is independent of the motor design. Specifically, in the case of SRM, the number of the stator/rotor poles and the related issues of the dwell angle and current overlap parameters affect the inverter choice. The multilevel power converters open up a great deal of possibilities in control and can be used to achieve flexible current profiling but with the added benefit of lower switching frequencies and hence less converter losses. The idea is to use a matrix converter topology for finer control on flexible current profiling with three terminals of dc voltage source at the input. To illustrate the potential benefits of this converter, with SRM for EV applications, a Simulink model of proposed multilevel matrix converter was tested in interface with finite element model of the SRM.DOI: http://dx.doi.org/10.11591/ijpeds.v2i2.224
Novel Optimization Technique for PI Controller Parameters of ac/dc PWM Converter using Genetic Algorithms Vishnu Mohan Mishra; Amar Nath Tiwari; Nikhlesh Kumar Sharma
International Journal of Power Electronics and Drive Systems (IJPEDS) Vol 2, No 2: June 2012
Publisher : Institute of Advanced Engineering and Science

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Abstract

The aim of this paper is to present a novel control scheme and designing of reactance parameter of PWM convereterand,  find the optimized value of parameters for voltage PI controller for three phase ac/dc PWM converter. Using new trends Genetic algorithms- are discussed, as well.Paper describes the application of Genetic Algorithms for optimization of controller parameters of PWM converter. The behavior of the stability region is plotted with different sampling periods.Genetic Algorithms used for off-line searching Using the MATLAB, the simulation model of the dc- link PWM ac/dc converter is built up. According to the simulation results, it is known that, the presented control strategy is feasible and valid, and the converter can work well under dc motor load condition, and thus the total harmonics distortion (THD) can be reduced quickly and effectively. The PWM rectifier operates as a rectifier to supply dc power to its load a dc motor and at the same time, to improve the power factor and to compensate harmonics drawn from non-linear loads connected on the ac line.DOI: http://dx.doi.org/10.11591/ijpeds.v2i2.156 
Analysis of Discontinuous Space Vector PWM Techniques for a Seven-Phase Voltage Source Inverter Mohd. Arif Khan; Atif iqbal; Sk Moin Ahmad; zakir husain
International Journal of Power Electronics and Drive Systems (IJPEDS) Vol 2, No 2: June 2012
Publisher : Institute of Advanced Engineering and Science

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Abstract

This paper presents discontinuous space vector PWM (DPWM) techniques for a seven-phase voltage source inverter (VSI). Space vector model of a seven-phase VSI shows that there exist 128 space vectors with different lengths and maps into fourteen sided polygons. A number of possibilities could arise to implement modulation of inverter legs due to large number of available space voltage vectors. Two strategies are adopted here; one utilising large and two middle sets of space vectors to implement discontinuous space vector PWM. Clamping of legs of inverter to either positive or negative dc bus leads to discontinuity in the switching and consequently offers reduced switching loss modulation strategy. A significant reduction in switching losses can be achieved while employing DPWM in a seven-phase VSI. A generalised method is also proposed to realize the DPWM in a seven-phase VSI. Comparison of continuous and discontinuous PWM is presented in terms of switching current ripple. The experimental set-up is illustrated and the experimental results are presented.DOI: http://dx.doi.org/10.11591/ijpeds.v2i2.244
Effect of Rotor Current Control for Wound Rotor Induction Generator on the Wind Turbine Performance Mahmoud Rabie Barakat
International Journal of Power Electronics and Drive Systems (IJPEDS) Vol 2, No 2: June 2012
Publisher : Institute of Advanced Engineering and Science

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Abstract

This paper presents the effect of rotor current control of wound rotor induction generator driven by wind turbine during different operation modes when varying the rotor resistance. The studied modes are wind speed variation, starting especially at high wind speed. Moreover, the effect of the proposed control on short circuit and critical fault clearing time is investigated.DOI: http://dx.doi.org/10.11591/ijpeds.v2i2.213
DSTATCOM Application for Mitigation of Voltage Sag Caused by Dynamic Loads in Autonomous Systems Ambarnath Banerji; Dr. Sujit K. Biswas; Bhim Singh
International Journal of Power Electronics and Drive Systems (IJPEDS) Vol 2, No 2: June 2012
Publisher : Institute of Advanced Engineering and Science

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Abstract

This paper presents the application of distribution static compensator (DSTATCOM) for mitigating the frequently occurring problems of voltage dips in autonomous systems. Consumer loads are experiencing proliferation of induction motors. The starting of induction motors draws large current causing voltage sag (dip). Autonomous Power system is comparatively less stiff than the grid connected system. Large starting current, causing objectionable voltage drop, is critical for an autonomous system. DSTATCOM can be effectively used to redeem this power quality problem. An asynchronous generator with a motor load having a DSTATCOM connected in shunt is simulated on a MATLAB platform using Simulink and Power System Block set. The simulation establishes the capability of DSTATCOM to mitigate the voltage dip problem for an autonomous system.DOI: http://dx.doi.org/10.11591/ijpeds.v2i2.320  
A Comparative Performance Analysis of Torque Control Schemes for Induction Motor Drives R Rajendran; Dr. N.Devarajan
International Journal of Power Electronics and Drive Systems (IJPEDS) Vol 2, No 2: June 2012
Publisher : Institute of Advanced Engineering and Science

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Abstract

This paper presents a comparative study of field-oriented control(FOC), conventional direct torque control(DTC) and proposed space vector modulated direct torque control with low pass filter(SVM-DTC). The main characteristics of FOC, DTC and proposed SVM-DTC schemes are studied by simulation, emphasizing their advantages and disadvantages. The performance of three control schemes is evaluated in terms of torque, current ripples and transient responses. It is shown that the proposed scheme improves the performance by combining a low torque, current ripple characteristics with fast torque dynamics.DOI: http://dx.doi.org/10.11591/ijpeds.v2i2.207
Adaptive Recurrent Network Network Uncertainty Observer Based Integral Backstepping Control for a PMSM Drive System Chih-Hong Lin; Ren-Cheng Wu
International Journal of Power Electronics and Drive Systems (IJPEDS) Vol 2, No 2: June 2012
Publisher : Institute of Advanced Engineering and Science

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Abstract

The permanent magnet synchronous motor (PMSM) is suitable for high-performance servo applications and has been used widely for the industrial robots, computer-numerically-controlled (CNC) machine tools and elevators. The control performance of the actual PMSM drive system depends on many parameters, such as parameter variations, external load disturbance, and friction force. Their relationships are complex and the actual PMSM drive system has the properties of nonlinear uncertainty and time-varying characteristics. It is difficult to establish an accurate model for the nonlinear uncertainty and time-varying characteristics of the actual PMSM drive system Therefore, an adaptive recurrent neural network uncertainty observer (ARNNUO) based integral backstepping control system is developed to overcome this problem in this paper. The proposed control strategy is based on integral backstepping control combined with RNN uncertainty observer to estimate the required lumped uncertainty. An adaptive rule of the RNN uncertainty observer is employed to on-line adjust the weights of sigmoidal functions by using the gradient descent method and the backpropagation algorithm in according to Lyapunov function. This ARNNUO has the on-line learning ability to respond to the system’s nonlinear and time-varying behaviors. Experimental results are executed to show the control performance of the proposed control scheme.DOI: http://dx.doi.org/10.11591/ijpeds.v2i2.260

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