Homogenization method for laminated iron core taking account of hysteretic property

2016 ◽  
Author(s):  
Junji Kitao ◽  
Yasuhito Takahashi ◽  
Koji Fujiwara ◽  
Akira Ahagon ◽  
Tetsuji Matsuo ◽  
...  
Keyword(s):  
Homogenization Method ◽  
Iron Core ◽  
Hysteretic Property

Hysteresis Loss Analysis of Laminated Iron Core by Using Homogenization Method Taking Account of Hysteretic Property

2017 ◽  
Vol 53 (6) ◽  
pp. 1-4 ◽  
Author(s):  
Junji Kitao ◽  
Yasuhito Takahashi ◽  
Koji Fujiwara ◽  
Akira Ahagon ◽  
Tetsuji Matsuo ◽  
...  
Keyword(s):  
Homogenization Method ◽  
Hysteresis Loss ◽  
Iron Core ◽  
Loss Analysis ◽  
Hysteretic Property

Finite-element analysis of turbine generator using homogenization method taking account of magnetic anisotropy

2019 ◽  
Vol 38 (5) ◽  
pp. 1614-1626
Author(s):  
Ryoko Minehisa ◽  
Yasuhito Takahashi ◽  
Koji Fujiwara ◽  
Norio Takahashi ◽  
Masafumi Fujita ◽  
...  
Keyword(s):  
Magnetic Anisotropy ◽  
Homogenization Method ◽  
Field Analysis ◽  
Iron Core ◽  
Saturation Curve ◽  
Turbine Generator ◽  
Element Analysis ◽  
Content Type ◽  
Space Factor ◽  
Magnetic Field Analysis

Purpose This paper aims to propose a homogenization method considering magnetic anisotropy for a magnetic field analysis of a turbine generator. To verify the validity of the proposed method, the effects of magnetic anisotropy and a space factor on a no-load saturation curve and no-load iron loss of the turbine generator are discussed. Design/methodology/approach The proposed method was derived from the combination of the homogenization of microscopic fields in a laminated iron core with the modelling of two-dimensional magnetic properties based on free energy. To verify the validity, the proposed method was applied to a finite-element analysis of a simple ring core model. Finally, a no-load saturation curve and iron loss of the turbine generator was investigated by using the proposed method. Findings The computational accuracy of the homogenization method considering magnetic anisotropy is almost the same as that of the detailed modelling of the laminated structure in the magnetic field analysis of the laminated iron core. Furthermore, it is clarified that magnetic anisotropy does not have a large influence on the no-load saturation curve of the turbine generator because of the large air gap. On the other hand, the space factor affects the shape of the no-load saturation curve. Originality/value This paper verifies the validity of the homogenization method considering magnetic anisotropy method and elucidates the effects of magnetic anisotropy and a space factor on no-load characteristics of the turbine generator.

FEM Computation of Magnetic Field and Iron Loss in Laminated Iron Core Using Homogenization Method

2007 ◽  
Vol 43 (4) ◽  
pp. 1405-1408 ◽  
Author(s):  
Hiroyuki Kaimori ◽  
Akihisa Kameari ◽  
Koji Fujiwara
Keyword(s):  
Magnetic Field ◽  
Homogenization Method ◽  
Iron Loss ◽  
Iron Core

Modeling of eddy current losses in the iron core of electrical machines by a finite element homogenization method

2018 ◽  
Vol 12 (133) ◽  
pp. 24
Author(s):  
Vương Đặng Quốc
Keyword(s):  
Finite Element ◽  
Eddy Current ◽  
Eddy Currents ◽  
Source Region ◽  
Homogenization Method ◽  
Magnetic Flux Density ◽  
Iron Core ◽  
Eddy Current Losses ◽  
Density Distributions ◽  
High Frequency Effects

A finite element homogenization method is proposed for the magetodynamic h-conform finite element forumulation to compute eddy current losses in electrical steel laminations. The lamination stack is served as a source region carrying predefined current density and magnetic flux density distributions presenting the eddy current losses and skin effects in each lamination. In order to solve this problem, the stacked laminations are converted into continuums with which terms are associated for considering the eddy current loops produced by both parallel and perpendicular fluxes. An accurate model of accuracy is developed via an accurate analytical expression of the eddy currents and makes the method adapted to both low and high frequency effects to capture skin depths of fields along thicknesses of the laminations.

THE FORMATION, STRUCTURE AND DISSOLUTION OF THE FERRITIN IRON CORE STUDIED BY X-RAY ABSORPTION SPECTROSCOPY

1986 ◽  
Vol 47 (C8) ◽  
pp. C8-1155-C8-1157
Author(s):  
E. C. THEIL ◽  
D. E. SAYERS ◽  
C. Y. YANG ◽  
A. FONTAINE ◽  
E. DARTYGE
Keyword(s):  
Absorption Spectroscopy ◽  
Iron Core ◽  
X Ray ◽  
Ferritin Iron ◽  
X Ray Absorption

REDUCED MODEL OF PLASMA DISCHARGE CONTROL IN TOKAMAK WITH IRON CORE

2020 ◽  
Vol 7 (3) ◽  
pp. 11-22
Author(s):  
VALERY ANDREEV ◽  
◽  
ALEXANDER POPOV
Keyword(s):  
Optimal Control ◽  
Inverse Problem ◽  
Optimal Control Problem ◽  
Control Problem ◽  
Nonlinear Behavior ◽  
Plasma Discharge ◽  
Reduced Model ◽  
Iron Core ◽  
Power Sources ◽  
Real Power

A reduced model has been developed to describe the time evolution of a discharge in an iron core tokamak, taking into account the nonlinear behavior of the ferromagnetic during the discharge. The calculation of the discharge scenario and program regime in the tokamak is formulated as an inverse problem - the optimal control problem. The methods for solving the problem are compared and the analysis of the correctness and stability of the control problem is carried out. A model of “quasi-optimal” control is proposed, which allows one to take into account real power sources. The discharge scenarios are calculated for the T-15 tokamak with an iron core.

Development of High-Force-Density Iron-Core Linear Synchronous Motor

2012 ◽  
Vol 132 (4) ◽  
pp. 480-486 ◽  
Author(s):  
Masanobu Kakihara ◽  
Toshiyuki Hoshi ◽  
Toru Shikayama ◽  
Motomichi Ohto
Keyword(s):  
Synchronous Motor ◽  
Force Density ◽  
Iron Core ◽  
Linear Synchronous Motor

New Method of Surge Analysis on Transformer Windings under Consideration of Iron Core

2015 ◽  
Vol 135 (12) ◽  
pp. 711-716
Author(s):  
Hiroyuki Fujita ◽  
Kenichi Kawamura ◽  
Keizo Inagaki
Keyword(s):  
New Method ◽  
Iron Core
Sign in / Sign up

Export Citation Format

Share Document