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1227 articles for “Phases”
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Fault Detection and Online Monitoring of Three Phase Induction Machine using Embedded Platform
Abstract: Protection of three phase induction machine is very important in industrial applications and it plays a vital role in our everyday life. This protection system protects the three phase induction motor from single phasing, under voltage, over voltage over current, and over temperature. Induction motors are kept in operation through tracking its condition in a continuous manner to minimize their unplanned down times. To avoid the consequence of unexpected failure …
Published in Journal of Control & Instrumentation · Vol. 9, Issue 2, 2018 · pp. 17–24 Read article
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Design and Implementation of Phase Shift Full Bridge DC-DC Converter for Photovoltaic Application
Abstract: Soft switched converters offer merits like lowered switching losses, reduced size of magnetic devices, lowered converter size, etc. Therefore, it is preferred topology in converter’s design. It also allows use of higher switching frequency. This research work focuses on development of 1 kW prototype of phase shift full bridge DC-DC converter for photovoltaic application. This paper discusses component selection criteria, magnetic component design criteria, hardware and software design issues. Simulation …
Published in Journal of Control & Instrumentation · Vol. 7, Issue 3, 2016 · pp. 21–27 Read article
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A Review of Single-Phase Grid Connected Transformerless Solar PV Inverter Topology
Abstract: Abstract: Owing to low cost and system compactness, transformerless inverters became popular in single-phase grid connected photovoltaic (PV) systems. Improvement of conversion efficiency, reduction in distortion of the grid current and minimizing common mode leakage current are the major concerns in these inverters. The purpose of this paper is to review on various transformerless solar PV inverters. In this paper, the single-phase inverters are classified into two major categories: 1) …
Published in Journal of Electronic Design Technology · Vol. 10, Issue 1, 2019 · pp. 1–7 Read article
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A Modular Three Phase AC Voltage Controller for Induction Motor
Abstract: AbstractThree phase induction motor (IM) is widely used in the industries because of rugged construction. User needs to control speed of the motor depending on the desired speed and application. In this paper launching of speed control of 3-phase IM is controlled by 3-phase AC voltage controller by varying the voltage by pulsewidth modulation (PWM) technique. In olden days speed control was possible for DC motors only, but with the …
Published in Journal of Power Electronics and Power Systems · Vol. 3, Issue 3, 2013 · pp. 1–5 Read article
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Evaluation of Reliability in Five-Phase Induction Motor Operated at Low Speed by V/F Control Method using FPGA
Abstract: AbstractThis paper presents the study of performance and reliability evaluation of five-phase induction motor by finding various parameters in the induction motor. Induction motors have increased demand for low cost and size, simple construction, least maintenance, operational simplicity and brush-less construction with cage rotor. Industrial applications demand high efficiency, and reliable and long life-time electrical machines. The fault modes of induction machines are very complex; many researchers are plagued to …
Published in Journal of Power Electronics and Power Systems · Vol. 4, Issue 2, 2014 · pp. 56–61 Read article
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Different Types of PWM Techniques for Single Phase Inverter: A Review
Abstract: In this paper, different types of PWM techniques and their methodology of single-phase inverter have been introduced. The PWM technique used in single phase inverter is more advantageous than conventional inverter. This paper includes the review of modern power devices such as MOSFETs, IGBTs, etc. The conventional inverter output voltage changes according to the change in load but in single phase PWM inverter gives the steady output of voltage 230 …
Published in Journal of Power Electronics and Power Systems · Vol. 12, Issue 3, 2022 · pp. 19–25 Read article
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Wall to Bed Mass Transfer in the Presence of Double Cone Promoter in a Three Phase Fluidized Bed with Conical Entry of Electrolyte
Abstract: AbstractInvestigations have been carried out experimentally to study the effect on wall-to-bed mass transfer coefficient in presence of double cone promoter in a three-phase fluidized bed with a conical entry of electrolyte. The system chosen was an electrolyte as liquid phase, glass spheres of different diameters as solid phase and inert nitrogen as gas phase. The electrolyte was an equimolar solution of potassium ferricyanide and potassium ferrocyanide each of 0.01 …
Published in Journal of Petroleum Engineering & Technology · Vol. 7, Issue 2, 2017 · pp. 39–43 Read article
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Two-Phase Flow Modelling in Clay Rich Shale
Abstract: Computational fluid dynamics (CFD) have made huge strides lately and are bit by bit turning into a pervasive device in science and engineering. In this paper, we present a new mathematical model, which adequately describes single- and two-phase flow, which considers relative permeability and capillary pressure in water rich clay shale. Furthermore, we implement the two-phase flow model into COMSOL multiphysics software. From the result analysis, it is concluded that …
Published in Journal of Petroleum Engineering & Technology · Vol. 6, Issue 3, 2016 · pp. 44–53 Read article
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Tuning Range, Phase Noise and Jitter Analysis of Current Starved Voltage Controlled Oscillator (VCO) for Digital PLL in 45 nm CMOS Technology
Abstract: A wide tuning range, low phase noise and low jitter 100 MHz Voltage-Controlled Oscillator (VCO) for DPLL was designed and implemented by 45 nm CMOS process technology using LT spice. There was a relation between the frequency tuning range, phase noise, and jitter at output of the VCO after linearizing the gain. Simulations using PTM 45 nm CMOS process technology shows, that a wide operation frequency range (tuning range) from …
Published in Journal of VLSI Design Tools and Technology · Vol. 5, Issue 2, 2015 · pp. 81–89 Read article
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Exploiting Phase of Speech Signal for Speaker Recognition
Abstract: Abstract—Performance of speaker recognition system with feature based on temporal phase is presented in this paper. In the state of the art spectral feature, Mel Frequency Cepstal Coefficient (MFCC) only magnitude of the Fourier Transform of speech signal is considered while phase is ignored. The cepstral coefficients extracted from temporal phase (MFTPC) of speech signal are used as features for speaker recognition system. The performance of MFTPC feature is evaluated …
Published in Journal of Communication Engineering & Systems · Vol. 9, Issue 2, 2019 · pp. 81–87 Read article
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Effect of Glycemic Control on Sputum Conversion at the End of Intensive Phase of Category I DOTS Therapy among Patients with Pulmonary Tuberculosis
Abstract: India is an endemic country of tuberculosis and diabetic capital of the world. A patient with diabetes has more chance of occurrence tuberculosis. Many studies pointed out the merging epidemic of diabetes and tuberculosis. Rifampicin and Isoniazid are the most prominent drugs in anti-TB treatment. These drugs disrupt the metabolism of many anti-hypoglycemic agents and lower the plasma levels, leading to hypogycemia. In non-diabetics, it impairs the release and action …
Published in Journal of Nursing Science & Practice · Vol. 10, Issue 1, 2020 · pp. 13–17 Read article
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Numerical Study of Melting Process of Phase Change Material Filled in Rectangular Cavity with Partially Active Walls
Abstract: This paper presents numerical investigation of melting process inside rectangular cavity with partially active walls. Enthalpy porosity approach is used to simulate convection dominated melting inside rectangular cavity. Gallium is used as phase change material. Numerical model is validated with available experimental results. Numerical investigation is carried out to investigate the influence on melting behaviour of phase change material for relative positions of hot and cold walls. Results show that …
Published in Journal of Thermal Engineering and Applications · Vol. 4, Issue 2, 2017 · pp. 32–38 Read article
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Some Imputation Methods in Two-Phase Sampling Scheme for Estimation of Population Mean
Abstract: In this paper, authors have proposed a class of dual to ratio estimator for estimating the finite population mean in presence of missing values in two-phase sampling design. Two different sampling designs in two-phase sampling are compared under imputed data. The bias and MSE of suggested estimator is derived in the form of population parameters using the concept of large sample approximation. Numerical studies are performed over two populations using …
Published in Research & Reviews : Journal of Statistics · Vol. 7, Issue 1, 2018 · pp. 1–16 Read article
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Experimental Investigation on the Performance of Photovoltaic Panel with and Without Phase Change Material Heat Sink
Abstract: AbstractThe future of solar energy conversion into electricity is one of the recognized classes of technology seeing that abundance of a free and clean source of energy in almost every part of continents. The effect of exceeding in temperature on Photovoltaic (PV) cells remains one of the major disadvantages of this technology. In order to improve the power utilization of the PV panel, it is necessary to maintain cell temperature …
Published in Journal of Thermal Engineering and Applications · Vol. 7, Issue 2, 2020 · pp. 15–23 Read article
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Simulation of Three Phase PWM Rectifier for Reduced Harmonics in Line Current using FOPID Controller
Abstract: Abstract: The proposed system is three phases PWM rectifier with current controlled loop which issued for harmonic reduction in A.C. current. The current controlled loop consists of FOPID controller which reduce peak overshoot FOPID controller has benefit in stabilizing DC voltage. The simulation confirms the effectiveness of the proposed method by giving low harmonics output and less amount of power loss in which switching time is controlled to increase energy …
Published in Journal of Instrumentation Technology & Innovations · Vol. 9, Issue 1, 2019 · pp. 29–35 Read article
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Analysis of the Effect of Load Variation on Grid-Connected Three-phase Asynchronous Motor
Abstract: AbstractThis paper based on the MATLAB/SIMULINK Analysis of the variation of torque-speed characteristics of three-phase induction motor with the variation of load (p.u). The entitled paper also shows the comparative study of three-phase induction motor with the help of MATLAB/SIMULINK diagram. The paper presents the use of passive filter in place of another type of filter this gives the various result shown in the result.Keywords:Passive filter, load torque, motor, torque, …
Published in Journal of Instrumentation Technology & Innovations · Vol. 9, Issue 2, 2019 · pp. 24–40 Read article
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Preparation of Phase – Pure Nanocrystalline Anatase and Rutile TiO2 using Hydrolysis of TiCl4 in presence of surfactants
Abstract: Hydrolysis of TiCl4 was carried out in two different ways to prepare nano crystalline TiO2. In the first method the hydrolysis of TiCl4 was carried under high acidic conditions at low temperature. In the second method hydrolysis was carried out using (NH4)2SO4 as an additive. It can be seen that the hydrolysis of TiCl4 under high acidic conditions promotes the growth of rutile phase of TiO2, where as hydrolysis in …
Published in Journal of Materials & Metallurgical Engineering · Vol. 8, Issue 1, 2018 · pp. 31–40 Read article
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Harmonic Analysis of Single Phase Inverter
Abstract: AbstractIn this paper, study is carried out to investigate the THD of various voltage control signal techniques for single phase PWM inverter. The inverter is implemented using three pulse width modulation techniques- unipolar PWM, modified sine PWM and harmonic injection modulation. The performance of these control schemes are evaluated through simulation in MATLAB/SIMULINK. The obtained THD and fundamental magnitude of the output AC is tabulated.Keywords: Single phase inverter, pulse width …
Published in Journal of Microelectronics and Solid State Devices · Vol. 5, Issue 2, 2018 · pp. 20–28 Read article
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Application of Aqueous Two-Phase Systems in the Extraction of Bovine Serum Albumin
Abstract: Protein partitioning in an aqueous two-phase system (ATPS) has been found to be a powerful method for extracting and separating mixtures of biomolecules. In ATPS, many factors influence the partition coefficient K (which is the ratio of protein concentration in the top phase to that in the bottom phase) and the recovery percent (Rec%). Two systems of ATPS were used: first, polyethylene glycol (PEG4000)/sodium phosphate, and second, PEG4000/dextran. The behavior …
Published in Journal of Polymer & Composites · Vol. 11, Issue 1, 2023 · pp. 41–50 Read article
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Hardware Implementation of IoT-based Health Monitoring of Three-phase Induction Motor
Abstract: In this project, a wireless monitoring system for three-phase induction motor is realized usingIoT (internet of things), where wired communication is either more expensive or impossibledue to physical conditions and human hazards for safe and economic data communication inindustrial fields. The parameters such as phase current, speed, vibrations and temperature aremonitored by Raspberry Pi and then send these values on cloud. The aim of this project is tomonitor and acquire …
Published in Journal of Power Electronics and Power Systems · Vol. 9, Issue 3, 2019 · pp. 43–49 Read article