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372 articles for “Pulses”
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Supercapacitor-Battery Hybridization to Prevent Battery Life for Pulsed Load Applications
Abstract: Management of power in the pulsed load applications has become a significant issue when it comes to the battery backup systems. For the pulsed load applications, deep discharge of the battery and battery health problems are very well known. In this paper, an attempt is made to overcome these key challenges by connecting a high power density device, ultracapacitor (super capacitor) in parallel with the battery. The role of ultracapacitor …
Published in Journal of Power Electronics and Power Systems · Vol. 8, Issue 1, 2018 · pp. 1–15 Read article
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ULTRAFAST LASERS AND ITS USE IN ELECTRONICS INDUSTRY
Abstract: The size of semiconductors and packaged devices continues to shrink enabling the devices to become more compact . This trend requires the deployment of sophisticated equipments with inbuilt lasers that have unique capability to process diverse materials with high precision , but without damaging the electronic components due to heat . There are diverse laser technologies utilising longer pulse width or ultrashort pulse (USP) width that are employed in electronic …
Published in Journal of Semiconductor Devices and Circuits · Vol. 8, Issue 2, 2021 · pp. 34–45 Read article
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Analysis of Six-Pulse Bridge Circuits Including Zener and Semiconductor Diodes Part One
Abstract: This paper addresses the analysis of electronic bridge circuits including Zener and/or semiconductor diodes. The analysis is based on recently suggested models for these diodes. A compact Mathematica code written in the Versions 7.0, 11.3 and 12.2 simulating a six-pulse rectifier bridge circuit is then derived and mathematically implemented. It investigates the time-domain transient and steady-state analysis of several representative case studies. In principle, the computer simulation can yield the …
Published in Journal of VLSI Design Tools and Technology · Vol. 12, Issue 1, 2022 · pp. 14–22 Read article
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Is low-intensity pulsed ultrasound effective in treatment of tibial nonunion?
Abstract: Background: Nonunions have been mainly treated with invasive methods by adequate mechanical stability and provision of biological environment leading to bone healing rate of 68%-96%, however, with inherent risks and complications. As an alternative to surgical interventions, low-intensity pulsed ultrasound (LIPUS), a biophysical method has been emerged. We aimed to prospectively compare the clinical and functional outcomes between two groups treated with LIPUS and capacitively coupled electric fields (CCEFs) for …
Published in Research and Reviews : Journal of Surgery · Vol. 11, Issue 3, 2022 · pp. 1–5 Read article
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Sinusoidal Pulse Width Modulation Switching Technique based Single Phase Inverter
Abstract: This paper discusses about the inverter which transfers power from DC source to AC load side. Inverters are usually used in motor drive, static var compensators, uninterruptible power supplies (ups), etc. Pulse Width Modulation (PWM) technique is used because the total harmonics distortion is low as compared with other techniques. The switching scheme of sinusoidal PWM permits control of the frequency and the magnitude of the output. This switching scheme …
Published in Journal of Power Electronics and Power Systems · Vol. 9, Issue 1, 2019 · pp. 34–41 Read article
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Evaluating the Role of Arterial Duplex Ultrasound in Diabetic Foot Ulcer Patients with Normal Ankle Brachial Pressure Index and Peripheral Pulses
Abstract: Background: Requesting a arterial duplex scan has been a recent trend in management of diabetic foot ulcer, as it is considered the gold standard modality of investigation for diagnosing peripheral arterial diseases. Nevertheless, increased burden of the diabetic foot ulcer patients and limited availability of the facilities and trained radiologists prompts us to use this investigation judiciously. Most of the studies focus on role of abnormal ABPI as a predictor …
Published in Research and Reviews : Journal of Surgery · Vol. 11, Issue 2, 2022 · pp. 28–33 Read article
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Reduce Harmonic Distortion using Pseudorandom PWM Technique
Abstract: Due to harmonic content in the voltage and current wave forms in the power electronic devices working at high frequencies cause mechanical vibrations, acoustic noise, and EMI interference makes the workers uncomfortable. Proposed work deals with a new and effective technique to possess low acoustic noise and mechanical vibration when lower switching frequency is chosen. Pseudo random pulse width modulation the new established technique is used to eliminate this undesirable …
Published in Journal of Microcontroller Engineering and Applications · Vol. 3, Issue 2, 2016 · pp. 8–13 Read article
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Effect of Pulse Current Micro Plasma Arc Welding Parameters on Pitting Corrosion Rate of AISI 316Ti Sheets in 3.5 N NaCl Medium
Abstract: Austenitic stainless steel sheets are used for fabrication of components, which require high temperature resistance and corrosion resistance such as metal bellows used in expansion joints in aircraft, aerospace and petroleum industries. When they are exposed to seawater after welding they are subjected to corrosion as there are changes in properties of the base metal after welding. The corrosion rate depends on the chemical composition of the base metal and …
Published in Journal of Materials & Metallurgical Engineering · Vol. 6, Issue 3, 2016 · pp. 12–24 Read article
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A Study on the Characteristics of the Thermal Line Induced in the Limbs of a Human Body with a Pulse Light ACUP-Stimulation: New Meridian Phenomenon
Abstract: As the essence is clarified through phenomena, so the essence of the meridian is explained through their phenomena. In the past, it was attempted to clarify the nature of meridian by exploring the mechanisms of the meridian, but the aim of the present study was not achieved because of the lack of universality of the phenomena of the existing meridian phenomena. The same was the case for the thermal line—the …
Published in Research and Reviews: A Journal of Medicine · Vol. 13, Issue 1, 2023 · pp. 28–35 Read article
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Parametric Analysis on Pulsating Heat Pipes
Abstract: Day-by-day the size of the electronic components is being drastically decreased, but at the same time the computing capacities are improved manifold. This presents a new challenge in the thermal management of these components. Pulsating Heat Pipes (PHP) can transport warmth for considerable distances leading to placement of condenser away from compact cabinets. From the literature, it is observed that Acetone, Ethanol and Distilled water are the most widely used …
Published in Recent Trends in Fluid Mechanics · Vol. 4, Issue 1, 2017 · pp. 38–43 Read article
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INFLUENCE OF PULSED TIG WELDING PROCESS PARAMETERS ON MECHANICAL PROPERTIES OF ALUMINIUM ALLOY JOINT: A REVIEW
Abstract: The increase use of aluminium alloy in the previous decades in automobile industry have recommended the research towards learning its behaviour in dissimilar condition with application. Pulsed tungsten inert gas (TIG) welding in aluminium alloy is one of the generally utilized method towards manufacturing the car parts. The present work relates to the enhancement of mechanical properties of Aluminium amalgam welds through beat tungsten latent gas (TIG) welding process. Input …
Published in Journal of Industrial Safety Engineering · Vol. 5, Issue 3, 2018 · pp. 13–18 Read article
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Development of Random Pulse Width Modulation in Power Electronics Converter
Abstract: With the new advancement in power electronic devices the high frequency system can often causes acoustic noise, mechanical vibration, EMI related problems in inverter-fed AC machine due to harmonics content in voltage and current waveforms which makes operator feel uncomfortable to work. Proposed work deals with one of the Pulse Modulation Technique, Random Pulse Width Modulation (RPWM), which is a new and effective technique to let the inverter-fed ac motor …
Published in Journal of Microelectronics and Solid State Devices · Vol. 3, Issue 1, 2016 · pp. 1–8 Read article
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A Hybrid Cascaded Multilevel Inverter using Space Vector Pulse Width Modulation
Abstract: This paper proposes a topology of hybrid cascaded multilevel inverter consisting of two inverters namely main inverter and auxillary inverter. Main inverter consists of three-leg inverter with single DC source and auxillary inverter consists of three H-bridge two-leg inverter with separate DC sources for each H-bridge. Switches used in our proposed method are IGBT (insulated-gate bipolar transistor). The proposed model consists of 18 switches. The switches are controlled by space …
Published in Journal of Power Electronics and Power Systems · Vol. 5, Issue 1, 2015 · pp. 14–19 Read article
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Prospects of Shale gas in India verses Global Scenario and Future of Plasma Pulse Technology
Abstract: Conventional sources are expensive, polluting and limited by its reserves so, it will not be able to meet the demand of a country which is increasing continuously. This concern triggered the scramble to secure long term oil supplies and shown their reliance on the unconventional resources. Shale gas is natural gas trapped in the shale formation with organic rich content of methane. Huge reserves have been found in United States, …
Published in Journal of Petroleum Engineering & Technology · Vol. 6, Issue 2, 2016 · pp. 35–43 Read article
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Performance of Offshore Steel Jacket Platforms under Near-source Ground Motion Type Pulses
Abstract: Behaviour of jacket type offshore structures under ordinary ground excitations has already been addressed by a number of researchers. However, their performance under near-source ground excitations has not been particularly addressed in the literature. Records from recent earthquakes, such as the Kobe Japan (1995) and Chi-Chi Taiwan (1999), have revealed that the dynamic excitations in near-source are dominated by a large, narrow band and long period pulse caused by rupture …
Published in Journal of Structural Engineering and Management · Vol. 1, Issue 2, 2014 · pp. 17–31 Read article
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Fourier Transform and Optical Analogy of the Sharply Pulsed E.P. Seismic Signals Propagating Through The Core of Earth
Abstract: AbstractLike light rays that encounter a water surface, seismic rays are governed by the laws of reflection and refraction. Eventually, there exist wave properties within these. Due to rigorous BIS (breakdown of integrated system) processes, severe consequences like earthquakes occur. The waves that are generated in an earthquake down into the interior of the earth are called earthquake waves or seismic waves. In the present paper, the author will consider …
Published in Trends in Opto-electro & Optical Communication · Vol. 5, Issue 1, 2015 · pp. 9–12 Read article
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Assessment of Compressive Strength of OPC and PPC-Based Concretes Combined by Ultrasonic Pulse Velocity and Rebound Hammer
Abstract: In this study, non-destructive tests were performed on ordinary Portland cement (OPC) and Portland pozzolana cement (PPC) based concrete specimens, namely the ultrasonic pulse velocity (UPV) and rebound hammer (RN). A relationship is thus established between the NDT values and the compressive strength. A statistical regression analysis was performed between the compressive strength with UPV and RN values to obtain a best-fit relationship and correlation coefficients. To take into account …
Published in Journal of Construction Engineering, Technology & Management · Vol. 2, Issue 1-3, 2012 · pp. 1–16 Read article
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Adaptive Neuro-Fuzzy Inference System (ANFIS) Control for Total Harmonic Distortions Reduction of Multi-Pulse STATCOM
Abstract: In this paper proposed ANFIS System is adapted for controllable mitigation of Total harmonic distortions of STATCOM with Multiple pulse technology. Integrated power electronics device, Gate Turn Off (GTO) is used in switching mode with Voltage source convertor during application of distinct load conditions. The proportional and integrated Controller is replaced by a smart fuzzy logic controller that offers great support for harmonic mitigation by redefining the electrical magnitudes of …
Published in Journal of Mechatronics and Automation · Vol. 9, Issue 2, 2022 · pp. 17–31` Read article
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An Overview of Welding of Aluminium Alloys through Pulse – Gas Metal Arc Welding Process
Abstract: Newer aviation and automobile designs intend at minimizing weight. Motivated by this requirement light metal industry is experiencing some stimulating developments. One of the mainly used light metals is aluminium. As aluminium is exploited as a substitute material, many challenges have been emerged in front of manufacturers. Some of them are development of new aluminium alloys, joining of diverse types of aluminium alloys and enhancement in weld quality of welds …
Published in Journal of Materials & Metallurgical Engineering · Vol. 8, Issue 1, 2018 · pp. 17–24 Read article
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The Energization Transients of 6-Pulse Rectifier Circuits
Abstract: This paper addresses the energization transients of 6-pulse rectifier circuits. It applies anefficient representation of the diodes in order to describe their performance in both theforward and reverse directions. Without any loss of generality, the suggested method isapplied to the classical un-controlled six-valve full-wave rectifier bridge configuration. Theeffect of the load resistance, the eventual presence of smoothing shunt-capacitors and seriesinductors as well as the waveform of the supply voltage is …
Published in Journal of Power Electronics and Power Systems · Vol. 10, Issue 1, 2020 · pp. 18–30 Read article