1,720,991 research outputs found
Simulation flux distribution and loss calculation of three phase transformer core 100kVA using FEM
No full textThis theses describes result of simulation flux distribution and loss calculation on
three phase transformer core 100kVA using FEM. From these theses, best material and best T-Joint configuration can be found. It’s important to make sure transformers work at 100% efficiency. Transformer is a device that transfers electrical energy from one circuit to another circuit with a shared magnetic field. Transformer can converts voltage by step-up and step-down. The transformer core is used to provide a controlled path for the magnetic flux which generated in the transformer. The core is built up from thin sheet – steel with
many layers of lamination. The lamination that is used to reduce heating on transformer
core will cause power losses. Three types of transformer core were used in this simulation
such as M5, MOH and ZDKH. T-Joint configuration is importance in avoidance the losses. Transformer core configurations in this simulation were 23˚ T-Joint, 45˚ T-Joint, 60˚ TJoint and 90˚ T-Joint. Simulation on power loss and flux distribution will be done by using FEM software called Quickfield 5.5. QuickField is an interactive environment for electromagnetic, thermal and stress analysis. QuickField can perform linear and nonlinear magnetostatic analysis for 2-D and axisymmetric models. Flux density for M5 was 1.79T better than the MOH and ZDKH material which only 0.207T and 0.214T. Best T-Joint
configuration for each material was 60˚ T-Joint. Flux line, flux density and T-Joint
configuration were an important factor in causing the differences in performance
Design of 0.5 hp induction motor rotor bars with 0.35 mm and 0.50 mm thickness of steel sheets for rotor fabrication
No full textDoctor of Philosophy in Electrical Systems EngineeringIn this project, the 0.5 Hp three phase induction motor have been thoroughly investigated and analyzed in terms of the induction motor parameter, torque, efficiency, power factor, losses reduction, transfer mechanism and economic aspects. Throughout
this project, the performance and the development of the three phase induction motor when it design and modelling by using 0.35 mm and 0.50 mm thickness of steel sheets was fabricated and compared it. First, the mathematical analysis of alternating current
(AC) induction motor is done to calculate all the loss and equivalent circuit parameters for 0.5 Hp 3 phase induction motor. This is to show the efficiency and the amount of energy that is consumed in an induction motor. Second, the research involves designing
and simulating the 0.5 Hp 3 phase induction motor using MotorSolve IM software, AutoCAD software, Opera 2D software and MATLAB software. From the simulation, analysis such as power loss, magnetic flux density, eddy current density, torque vs.
speed, power loss vs. speed, efficiency vs. speed, and power factor vs. speed is done. A comparative study is done between the uses of 0.35 mm and 0.50 mm thickness of material in the rotor of induction motor. Third, the rotor part of an induction motor for
different thicknesses are fabricated and investigated in terms of its efficiency increment, power factor improvement, flux distribution and loss reduction capabilities
Simulation flux distribution and loss calculation on Three Phase Transformer core 1000 KVA using FEM
No full textThis project will show the flux distribution simulation and loss calculation on three phase transformer core 1000kVA using Finite Element Method. Transformer is static device that convert electrical energy from one electric circuit to another, with fix frequency, by the principles of electromagnetic induction either increases (steps up) or decreases (steps down) AC voltage. A transformer does not generate electrical power. It transfers electrical
power from one AC circuit to another through magnetic coupling. The transformer core is
used to provide a controlled path for the magnetic flux which generated in the transformer. The core is build up from thin sheet-steel with many layer of lamination. The lamination is use to reduce heating on transformer core which will cause power loss. For this project, a grain oriented silicon steel M-5 chosen as steel sheet for the transformer. The T-Joint configuration that used in this simulation is 23°, 45°, 60° and 90° will test with four packet
of transformer which is in different size of. The simulation will use Finite Element method software called Quickfield 5.5. QuickField 5.5 is a very efficient Finite Element Analysis package for electromagnetic, thermal and stress design simulation with coupled multi-field analysis. From the result of the simulation, it show that the direction of flux line for the transformer lamination is based on the direction of the limb. The result also shown that the 60° T-joint is the best configuration of the transformer lamination and transformer lamination with different packet is more efficient than with the same packet. The best configuration and the most efficient of transformer lamination recorded the lowest losses
Penggunaan Motor Arus Searah Penguatan Seri sebagai Pengereman pada Kereta Api Listrik
Get PDFDidalam pengoperasian kereta api listrik ini memerlukan sistem
penggerak. Sistem penggerak dapat diperoleh dari motor - motor listrik, dalam hal ini yang dipergunakan adalah motor listrik arus searah penguatan seri.
Penggunaan motor listrik tersebut selalu dilengkapi dengan pengereman, yang mana tujuannya ialah untuk menghentikan atau memperlambat motor tersebut dan sekaligus beban yang digerakkannya tanpa harus memutuskan dari sumbernya
The effect of field resistance on speed of DC shunt motor
No full textThe objective of the experiment in this project is to study the speed of DC shunt motor when it is supplied by voltage. The speed of the DC shunt motor is controlled by variable-field resistance. The speed of the DC motor is measured by using a Tachometer. The control of the field resistance will give different speed and other particular such as flux value, armature current and torque. These measurements data will be translated into a tables and will produce a graphs. These graphs will be a key about the
theory that have been discuss in this project. The equipment used in this project is a DC machine which have a DC motor and DC generator and the model used is MG-5211
Design resonant transformer
No full textAccess is limited to UniMAP community.This project aims to design a resonant transformer. A resonant transformer is basically an electromagnetic static equipment based on the principle of Faraday’s law of electromagnetic induction that can be generate high alternating voltages and current. Due to resonance, a very high voltage can develop across the secondary, until it is limited by some process such as electrical breakdown. Based on knowledge of basic principle of transformer, that rated capacity of resonant transformer is design with 2.0KVA. The winding of transformer is 182 primary turns and 3636 secondary turns respectively. It designed as 100V of primary voltage and 2000V of secondary voltage. The resonant coil, usually the secondary, acts as an inductor, and are connected in series with a capacitor. When the primary coil is driven by a periodic source of alternating current, such as a square or wave at the resonant frequency, each pulse of current helps to build up an oscillation in the secondary coil
Analysis and design of induction motor applying Matlab
No full textFunction of Induction motor is a three phase AC motor and is the most widely used machine. An Induction motor has basically two parts; Stator and Rotor. The Stator is made up of a number of stampings with slots to carry three phase windings. It is wound for a definite number of poles. Two types of rotors are used in Induction motors, Squirrel-cage rotor and Wound rotor. A squirrel-cage rotor consists of thick conducting bars embedded in parallel slots. These bars are short-circuited at both ends by means of short-circuiting rings. A wound rotor has three-phase, double-layer, distributed winding. It is wound for as many
poles as the stator. The three phases are wyed internally and the other ends are connected to slip-rings mounted on shaft with brushes resting on them. The function of MATLAB programming is provides an interactive and integrated environment that allows performing mathematical computations, generating plot, writing programs and creating graphical user interface. It has a number of add-on software modules called tool boxed that perform more specialized computations. From this project, it can find the value of calculation and the value of Induction Motor parameter using MATLAB Programming
AC motor braking with dynamic
No full textThis AC motor braking with dynamic is about the motor to stop or more known with brake. Usually inside motor industry, need motor stop or brake instantly. To generate this system, has been divided into three stages. First stages are design and build electromagnet. Second stages are combine together electromagnet and the motor. And finalstage is testing and takes the measurement of the magnetic brake and the motor. This motor would function as following that is when motor starts, electromagnet will hold the iron to make the motor running and when stop ,the magnet will be release the iron that make the motor stop immediately. Goal of this project is know how to generate strong electromagnet to attract burden and produce one prototype motor AC dynamic brak
Going Beyond Counting First Authors in Author Co-citation Analysis
Get PDFThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
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