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376 articles for “Pulses”
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Performance Evaluation of Single Phase Cascaded Nine Level Inverter using Photovoltaic (PV) SystemPerformance Evaluation of Single Phase Cascaded Nine Level Inverter using Photovoltaic (PV) System
Abstract: Multilevel inverters are considered at present as the state of the art power conversion systems for high power and power quality demanding applications. This paper’s objective is to propose a modified cascaded nine-level inverter topology for a virtually sinusoidal output voltage, less number of power switches, results in decreased complexity and reduced total harmonic distortion (THD). The structure is simple and easy to be extended to higher level but also …
Published in Trends in Electrical Engineering · Vol. 8, Issue 1, 2018 · pp. 30–47 Read article
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Fuzzy and PI Based Speed Control of BLDC Motor using Bidirectional Converter for Electric Vehicle Application
Abstract: Fuzzy logic control can be used in BLDC motor to control the four quadrants of operation so as to avoid power loss. In this study, a fuzzy based controller for speed control of BLDC motor is done, and it is compared with the conventional PI controller-based speed control technique. In addition to this, a bi-directional converter is used to achieve battery charging during regeneration and to charge the battery externally …
Published in Trends in Electrical Engineering · Vol. 8, Issue 3, 2018 · pp. 35–45 Read article
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Design and Simulation of a Transformer Coupled Push-Pull Inverter and Matrix Converter Types Smart Solar Grid System
Abstract: This research paper deals with the design and simulation of facile and robust AC voltage originator using a solar power. PV technology is used for generating DC voltage as solar power is very reliable source. Push-pull inverter is used to convert the DC to AC as well as enhanced the magnitude of single phase signal. Matrix converter is also used to convert the single phase AC to three-phase AC signal. …
Published in Trends in Electrical Engineering · Vol. 9, Issue 1, 2019 · pp. 1–16 Read article
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A Core Loss Model Based on Finite Element Method for Switched Reluctance Generator Considering Different Control Modes
Abstract: In the present paper, core loss modeling of switched reluctance generator (SRG) is proposed for the first time. Using ANSYS finite element (FE) package, 2D FE transient analysis of SRG is carried out and the stator pole flux waveform is predicted. To determine the flux waveforms in the different parts of the machine, an introduced mathematical flux model is considered and its algorithm is implemented in ANSYS Parametric Design Language …
Published in Trends in Electrical Engineering · Vol. 4, Issue 2, 2014 · pp. 26–33 Read article
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Simulation of Dynamic Voltage Restorer for Voltage Sag Mitigation
Abstract: In recent years, power quality is the major issue in transmission and distribution network. This paper concentrates on one of the power quality problem, such as voltage sag. A novel mitigation system is simulated using Dynamic voltage restorer (DVR). The proposed system is boosting the sagged phase voltage by deriving the voltages from other healthy phases. The system is designed with two ac chopper circuits and two transformers. The voltage …
Published in Trends in Electrical Engineering · Vol. 5, Issue 2, 2015 · pp. 7–13 Read article
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Harmonic Analysis for Different PWM Techniques
Abstract: In this paper, harmonic analysis of different pulse width modulation algorithms for induction motor drives is presented. This paper uses the PWM techniques such as conventional SVPWM, discontinuous PWM, simplified SVPWM and digital SVPWM. In this study, the conventional SVPWM and discontinuous PWM requires the angle and sector information but the simplified SVPWM uses the imaginary switching times which can be obtained from the reference voltages. In this study, the …
Published in Trends in Electrical Engineering · Vol. 6, Issue 1, 2016 · pp. 26–31 Read article
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Conversion of Existing Vehicle to Electric Vehicle
Abstract: The ambition of this project is to design and manufacture the electric vehicle which can be used to replace the existing vehicle working on combustion technology. The main aim is to reduce the consumption of fuel and to reduce carbon emission. This will give more comfort compared to existing vehicle. Now a days global warming, pollution, extinction of fuel and depletion of resources are the major reasons for shifting our …
Published in Trends in Electrical Engineering · Vol. 9, Issue 3, 2019 · pp. 22–29 Read article
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Experimental Investigations on Concentric Flow Dry Ultrasonic Assisted Wire Electric Discharge Machining (CFDUAWEDM) Using Regression Analysis
Abstract: This paper presents an application of concentric flow mode of dry dielectric (compressed air) supply for ultrasonic assisted wire electric discharge machining process (CFDUAWEDM). The concentric flow mode of dielectric supply using ultrasonic assistance is expected to offers improved surface integrity, environmental and operator friendliness during wire electric discharge machining (WEDM) process. Experimental set up was developed wherein, the ultrasonic vibration was applied to the electrode wire using an ultrasonic …
Published in Trends in Machine design · Vol. 3, Issue 2, 2016 · pp. 33–43 Read article
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A New Approach for Cuk Converter for Solar/Wind Hybrid Standalone System
Abstract: The non-conventional energy such assolar photovoltaic system and wind turbine are naturalresources and provides sustainable green energy .Now,Electricity is the most requisite means for man. All theenergy resources are depleting day by day In thecurrent technology , This project could be effective toachieve good prediction accuracy in smart grid usingdifferent weather conditions. It also upgrades thesocioeconomic condition of rural lives. In this articlebasically The wind turbine and solar photovoltaic (PV)are …
Published in Trends in Mechanical Engineering & Technology · Vol. 12, Issue 3, 2022 · pp. 18–28 Read article
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An Analysis of Optical Transmission System using Fiber Bragg Grating (FBG) with Power Optimization and Dispersion Compensation
Abstract: AbstractThe Fiber Bragg Grating (FBG) is a low cost filter for wavelength selection and also has low insertion loss. We know that Dispersion Compensation (DC) and Power Optimization (PO) are one of the most important parameters of the optical communication system. In this proposed communication model, dispersion compensation has been achieved and also we optimized almost same power at the receiver end, also we have calculated output power for different …
Published in Trends in Opto-electro & Optical Communication · Vol. 5, Issue 2, 2015 · pp. 1–5 Read article
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Performance Study for Optical Half Subtractor Based on SOA
Abstract: AbstractThis article explores for an optical binary half subtractor design which is based on the semiconductor optical amplifiers nonlinear characteristics. For that, the difference output operation of data’s has been realized in the one branch with semiconductor optical amplifier realizing XOR operation and for borrow operation the AND logic operation of the data B with complaint of data A is realized in the other semiconductor optical amplifier branch. Accordingly the …
Published in Trends in Opto-electro & Optical Communication · Vol. 5, Issue 3, 2015 · pp. 50–57 Read article
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Performance Study of Parabolically versus Exponentially Tapered Multimode Interference Coupler
Abstract: ABSTRACT This paper shows mainly the performance study on tapered section of Multimode Interference (MMI) coupler having either parabolic or exponential taper section. The comparative study of the 1 × 2 MMI coupler with proposed structure, such as the normalized width variation, and variation of MMI length are investigated by the 2D finite difference beam propagation method (BPM). We have found that exponential tapered MMI coupler has advantageous compared to …
Published in Trends in Opto-electro & Optical Communication · Vol. 2, Issue 2, 2012 · pp. 8–17 Read article
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Comparative Analysis of OOK and M-ary PPM Modulation Technique over Exponentiated Weibull Distribution under Different Turbulence Regime
Abstract: In this paper, the Exponentiated Weibull distribution has been investigated for different turbulence regime considering the aperture averaging at the receiver. The comparative analysis of modulation technique (on-off keying and pulse position modulation) has been presented for different aperture size under weak, moderate, and strong turbulence regime. The closed form of expression of bit error rate (BER) has been numerically derived from the cumulative distribution function (CDF) using the Gauss- …
Published in Trends in Opto-electro & Optical Communication · Vol. 11, Issue 1, 2021 · pp. 7–12 Read article
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Assessment of Deformation under Repeated Cracking-Healing Cycles of Asphalt Concrete
Abstract: The Asphalt concrete wearing course is subjected to direct tyre loading and practices distresses such as microcracks. However, asphalt pavement is known to exhibit self-healing ability of microcracks under repeated loading with rest period and controlled environment. In this work, the permanent deformation of the wearing course was assessed under repeated cracking and healing cycles. Asphalt concrete specimens of 100 mm diameter and 63 mm height have been prepared with …
Published in Trends in Transport Engineering and Applications · Vol. 7, Issue 3, 2020 · pp. 13–25 Read article
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Assessing the influence of aggregates and cement type on the properties of roller compacted concrete
Abstract: Roller compacted concrete pavement is suitable for heavy traffic and harsh environment. In the present investigation, roller compacted concrete slab samples have been prepared using two types of aggregates, (crushed and rounded), and two types of cement binder, (ordinary Portland and sulphate resistant). Cubes and beam specimens have been extracted from the slab samples with the aid of diamond saw. Specimens were tested for bulk density, ultrasound pulse velocity, compressive …
Published in Trends in Transport Engineering and Applications · Vol. 8, Issue 2, 2021 · pp. 1–7 Read article
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Analysis of Parabolically versus Exponentially Tapered Inbuilt Chip-to-Fiber Butt Coupler
Abstract: AbstractThe finite difference beam propagating method (BPM) is one of the most powerful technique to investigate linear and nonlinear lightwave propagation phenomena in axially varying waveguides such as curvilinear directional couplers, branching and combining waveguides, S-shaped bend waveguides, and different types of tapered waveguides. BPM is also quite important for the analysis of ultra short light pulse propagation in optical fibers. To date numerous algorithms for BPM have been proposed …
Published in Journal of Communication Engineering & Systems · Vol. 3, Issue 1, 2013 · pp. 11–15 Read article
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Calculating SAR Distribution and RF Electromagnetic Field Due To MRI Coil at Human Model
Abstract: AbstractMRI (magnetic resonance imaging) is an effective method for diagnosis of diseases. The MRI system is made of some important units including RF (radio frequency) devices [1]. The RF coil is one of the important parts in the RF unit. During the imaging, the RF coil radiates EM (electromagnetic) pulse to the human body and in response receives the NMR (nuclear magnetic resonance) signals emitted from the nuclei, which constitutes …
Published in Journal of Communication Engineering & Systems · Vol. 3, Issue 2, 2013 · pp. 1–8 Read article
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Smart Accident Avoidance System based on Alcohol and Heartbeat Detection
Abstract: AbstractIn our project, we are introducing a new smart system that will detect drunken persons and abnormal condition persons by alcohol sensor and heartbeat sensor. GSM system is used to send a message to the police station and relevant numbers for immediate action. GPS based system is used here to track those cars. Alcohol sensor detects the drunken persons before the ignition of the car, the car’s ignition will immediately …
Published in Journal of Computer Technology & Applications · Vol. 10, Issue 2, 2019 · pp. 27–31 Read article
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Plasma and Metallic Antenna: a Comparative Study
Abstract: Abstract: Plasma antenna is one of the most advanced technologies. The metal antennas used today use a metallic path to direct electromagnetic radiation. Plasma is an ionized antenna. Plasma antenna is a radio frequency receiver device that is made up of plasma segments that activate a surface wave. The importance of this antenna is quick and easy to activate and deactivate, by applying an electric pulse. In this study we …
Published in Research & Reviews: A Journal of Embedded System & Applications · Vol. 7, Issue 3, 2019 · pp. 5–8 Read article
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Ayurvedic Concept of Allergy in Reference to Diet and Regimen
Abstract: AbstractLife of man depends on three main sub-pillars; these are Ahar, nidra and brahmacharya. Ahar plays very important role to provide strength, complexion and lifespan. Nowadays, human life is too busy to fulfill his lawful diet. Some diets are incompatible, unwholesome while some are wholesome. Unwholesome and incompatible produce untoward skin diseases. Foods that are not suited to body produce allergy. Udard, koth, raktapradoshaja vikara and shitapitta are allergic disorders. …
Published in Journal of AYUSH: Ayurveda, Yoga, Unani, Siddha and Homeopathy · Vol. 2, Issue 2, 2013 · pp. 1–10 Read article