scholarly journals Improved Expression for Estimation of Leakage Inductance in E Core Transformer Using Energy Method

2012 ◽  
Vol 2012 ◽  
pp. 1-6 ◽  
Author(s):  
Sivananda Reddy Thondapu ◽  
Mangesh B. Borage ◽  
Yashwant D. Wanmode ◽  
Purushottam Shrivastava
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Energy Method ◽  
Fem Analysis ◽  
Field Pattern ◽  
The Finite Element Method ◽  
Leakage Inductance ◽  
Accurate Expression ◽  
Element Method

This paper proposes a simpler and more accurate expression for estimation of leakage inductance in E core transformer, which is the most widely used transformer structure. The derived expression for leakage inductance accounts for the flux extending into air. The finite element method (FEM) analysis is made on the secondary shorted transformer to observe the H-field pattern. The results obtained from FEM analysis are used for approximating the field that is extending into air to derive an expression for leakage inductance. This expression is experimentally validated on prototype transformers of different core dimensions.

scholarly journals Optimized Design of an ECAP Die Using the Finite Element Method for Obtaining Nanostructured Materials

2015 ◽  
Vol 2015 ◽  
pp. 1-8 ◽  
Author(s):  
Patricia Ponce-Peña ◽  
Edgar López-Chipres ◽  
Edgar García-Sánchez ◽  
Miguel Angel Escobedo-Bretado ◽  
Brenda Xiomara Ochoa-Salazar ◽  
...  
Keyword(s):  
Finite Element Method ◽  
Plastic Deformation ◽  
Finite Element ◽  
Tensile Strain ◽  
Fem Analysis ◽  
Optimized Design ◽  
The Finite Element Method ◽  
Angular Pressing ◽  
Cracking Tendency ◽  
Element Method

An alloy type A16060 was exposed to severe plastic deformation to study its reaction using the finite element method (FEM). To perform this, six different configurations were used in the design of the die’s channel for ECAP (equal channel angular pressing) to obtain nanostructure materials and to optimize the process. Thanks to simulation performed with FEM, it is possible to study the homogeneity in the deformation due to the variation of conditions affecting directly the material being processed using the ECAP technique, such as the friction coefficient, extrusion speed, and mainly the die’s channel geometry being utilized in the ECAP process. Due to the tensile strain area being located mainly in the upper part of the deformed test cylinder (plastic deformation area) which increases the fracture and cracking tendency preventing the processing through ECAP the die being utilized was modified to eliminate the tensile strain area favoring the appearance of compressive stress which reduces the cracking tendency and the fracture of the sample being processed. The FEM analysis demonstrated that the strain state changed significantly from tension to compression when the modified die was used, facilitating the processing of the piece by ECAP.

Comparison of Performance between Concentrated and Rhombic Windings for a Slotless Brushless DC Motor

2011 ◽  
Vol 130-134 ◽  
pp. 2832-2835
Author(s):  
Chang Chou Hwang ◽  
Ping Lun Li
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Fem Analysis ◽  
Dc Motor ◽  
Brushless Dc Motor ◽  
The Finite Element Method ◽  
Brushless Dc ◽  
Three Phase ◽  
Element Method

This paper presents and compares the performance of a two-pole, three-phase slotless brushless DC motor with two types of winding configuration: concentrated and rhombic windings. Application of the finite element method (FEM) analysis to their performance calculations is performed.

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.

scholarly journals Propagation of a Crack in a Composite Plate

2018 ◽  
Vol 55 (2) ◽  
pp. 179-183
Author(s):  
Ionel Iacob ◽  
Ionel Chirica ◽  
Elena Felicia Beznea
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Material Properties ◽  
Composite Plate ◽  
Extended Finite Element Method ◽  
Fem Analysis ◽  
The Finite Element Method ◽  
Extended Finite Element ◽  
Time Step ◽  
Element Method

In this paper, a model of a composite plate with a central elliptical cut-out and with an initial fissure was subjected to a tension load in the finite element method (FEM) software Abaqus to observe the propagation of that crack during a certain amount of time that elapsed in the FEM analysis. Due to symmetry, only half of the plate was modeled, as a shell, and the extended finite element method (XFEM) was used for the crack. The material properties that were assigned to the plate were taken from the database of the Ansys Mechanical software. In the vicinity of the crack a finer mesh was applied to be able to better observe the evolution of the fissure and the changes of the Von Misses stress graphs for each time step of the analysis.

scholarly journals FEM Analysis on the Frame of Cross Roll Straightener for Steel Pipes

2011 ◽  
Vol 2-3 ◽  
pp. 848-851
Author(s):  
Li Ping Wang ◽  
Jing Wei Piao ◽  
Ze Ning Xu ◽  
Chang Hua Jiang ◽  
Xin Bi
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Fem Analysis ◽  
Structural Type ◽  
Experimental Results ◽  
The Finite Element Method ◽  
Steel Pipes ◽  
Element Method

The intensity and rigidity of cross-roll pipe straightener frame are analyzed with the Finite Element Method (FEM) and the stress of the frame is tested. The FEM results are compared with experimental results and the accuracy and rationality of FEA results are verified. The analysis results have significant guidance to design and transformation the structural type of cross roll straightener and its frame.

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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