scholarly journals Computation of Power Transformer Reactance using Finite Element Method

2020 ◽  
Vol 8 (6) ◽  
pp. 1816-1821
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Industrial Revolution ◽  
Classical Method ◽  
Power Transformer ◽  
The Finite Element Method ◽  
3D Design ◽  
Equivalent Circuit Parameters ◽  
And Performance ◽  
Element Method

The reactance of the transformer windings is an important component for the design which has a direct effect on its operation. Reactance is used for computation of not only the transformer equivalent circuit parameters and also for designing its protection. The Roth’s method, Rabin method, method of images, and classical methods are the traditional methods used for its calculation. The finite element method can be used for the calculation of transformer reactance. In the industrial revolution 4.0 all manufactured transformers would be evaluated through their 3D design and performance analyzed by computational methods. In this work the reactance calculated by the finite element method has been compared to that calculated by the classical method. The calculated values of energy stored in the windings and other parts and the reactance can be found.

Research on Nozzle Array Structure Fluidic Gyroscope Sensitive Principle

2012 ◽  
Vol 542-543 ◽  
pp. 993-996
Author(s):  
Xing Wang ◽  
Lin Hua Piao ◽  
Quan Gang Yu
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Angular Rate ◽  
Central Axis ◽  
The Finite Element Method ◽  
Airflow Velocity ◽  
Element Simulation ◽  
Array Structure ◽  
And Performance ◽  
Element Method

The fluidic gyroscope sensitive principle with nozzle array structure was researched. Using the finite element method, according to the actual size, building an entity model, the finite element simulation was conducted by a series of procedures, such as meshing, loads applying and solving. Then the cavity flow field distribution was calculated in the different input angular rate. The results are as follows: In static status, airflow velocity shows a symmetry distribution through central axis of enclosure, the two hotwires endure the same current rate and current, then the bridge outputs zero. In the angular rate inputs, airflow velocity shows an asymmetry distribution through central axis of cavity. The two hotwires endure the different current rate, both of the hotwires current are changed with angular rate, then the bridge outputs a voltage with corresponding with the angular rate. The fluidic gyroscope sensitive principle with nozzle array structure is revealed by finite element method, which provides the foundation for the fluidic gyroscope structural and performance improvement.

scholarly journals Design, Structural and Electrostatic Analysis of Three MEMS Micro Accelerometers

2019 ◽  
Vol 3 (6) ◽  
Author(s):  
Jose Luis Gonzalez Vidal ◽  
Jose Luis Calderon Osorno ◽  
Edmundo Rene Duran Camarillo ◽  
Silvestre Ascencion Garcia Sanchez
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Low Power ◽  
Comsol Multiphysics ◽  
The Finite Element Method ◽  
Power Mems ◽  
Variable Distance ◽  
And Performance ◽  
Micro Accelerometer ◽  
Element Method

Three low-power MEMS micro-accelerometers were designed, the first with variable distance and the last with variable area. Then, electrostatic analysis and simulation by the finite element method was performed to show its behavior and performance. In the simulation and analysis the software COMSOL MULTIPHYSICS 5.1 was used. The results show that the variable area micro-accelerometer exhibits the best relationship between behavior and performance.

scholarly journals Performing Structural Design and Modeling of Transformers Using ANSYS-Maxwell

2021 ◽  
Vol 2 (2) ◽  
pp. 38-42
Author(s):  
Yıldırım ÖZÜPAK
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Power Systems ◽  
High Performance ◽  
Fem Analysis ◽  
3D Models ◽  
The Finite Element Method ◽  
Core Losses ◽  
And Performance ◽  
Element Method

Transformers have attracted great interest since they have been used due to their robustness and application in power systems. Therefore, the nominal values of transformers grow even more in larger power systems due to the constantly increasing power demand. Many types of research are carried out to increase the performance characteristics of transformers and their compatibility with power systems. There are different methods and analysis tools for these studies. One of them is ANSYS@Maxwell, which performs analysis based on the Finite Element Method (FEM). With this program, the design, modeling, analysis, and performance evaluation of the transformer in a high-performance simulation environment can be achieved through effective strategic modeling. In this study, the design and modeling of a three-phase core-type transformer with coils and terminals are explained in detail in ANSYS @ Maxwell simulation platform. Besides, the transformer models examined were adapted using ANSYS@MAXWELL software based on the finite element method. Analyzes are performed to estimate the core-losses, leak-losses, DC-losses, and winding-eddy current losses-of transformers with this program. A large number of meshes were used in FEM analysis of 2D and 3D models to examine the losses in detail.

Simulation of tuning graphene plasmonic behaviors by ferroelectric domains for self-driven infrared photodetector applications

Nanoscale ◽  
2019 ◽  
Vol 11 (43) ◽  
pp. 20868-20875 ◽  
Author(s):  
Junxiong Guo ◽  
Yu Liu ◽  
Yuan Lin ◽  
Yu Tian ◽  
Jinxing Zhang ◽  
...  
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Interfacial Effect ◽  
Infrared Photodetector ◽  
The Finite Element Method ◽  
Ferroelectric Domains ◽  
Element Method

We propose a graphene plasmonic infrared photodetector tuned by ferroelectric domains and investigate the interfacial effect using the finite element method.

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