Coupling field analysis and non-deterministic optimization by means of multiprocessor parallel computation for characterizing magnetic anisotropy

2011 ◽  
Author(s):  
P. Di Barba ◽  
K. Komeza ◽  
E.N. Juszczak ◽  
J.P. Lecointe ◽  
N. Hihat
Keyword(s):  
Magnetic Anisotropy ◽  
Parallel Computation ◽  
Field Analysis ◽  
Deterministic Optimization ◽  
Coupling Field

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.

Temperature and coupling field analysis of ring resonator

2018 ◽  
Author(s):  
Guangfeng Lu ◽  
Xudong Yu ◽  
Xuezhi Dai ◽  
Gao Na
Keyword(s):  
Ring Resonator ◽  
Field Analysis ◽  
Coupling Field

Comparison of Magnetic Field Analysis Methods Considering Magnetic Anisotropy

2010 ◽  
Vol 46 (2) ◽  
pp. 187-190 ◽  
Author(s):  
Teruyuki Tamaki ◽  
Keisuke Fujisaki ◽  
Kiyoshi Wajima ◽  
Koji Fujiwara
Keyword(s):  
Magnetic Field ◽  
Magnetic Anisotropy ◽  
Field Analysis ◽  
Analysis Methods ◽  
Magnetic Field Analysis

scholarly journals Self-assembly of a mixed-valence FeII–FeIII tetranuclear star

2018 ◽  
Vol 47 (21) ◽  
pp. 7118-7122 ◽  
Author(s):  
Darunee Sertphon ◽  
Phimphaka Harding ◽  
Keith S. Murray ◽  
Boujemaa Moubaraki ◽  
Nicholas F. Chilton ◽  
...  
Keyword(s):  
Magnetic Anisotropy ◽  
Single Molecule ◽  
Self Assembly ◽  
Mixed Valence ◽  
Ferromagnetic Coupling ◽  
Coupling Field ◽  
Self Assembled

A self-assembled mixed-valence FeII–FeIII tetranuclear star is reported that shows ferromagnetic coupling, field-induced single molecule magnetism and strong magnetic anisotropy at the peripheral FeII centres.

scholarly journals Fluid-solid coupling field analysis of centrifugal fan based on nonlinear dynamics

2017 ◽  
Vol 19 (7) ◽  
pp. 5473-5481
Author(s):  
Chenxu Luo ◽  
Shuangxi Jing ◽  
Xiaoming Han ◽  
Junfa Leng
Keyword(s):  
Nonlinear Dynamics ◽  
Field Analysis ◽  
Centrifugal Fan ◽  
Coupling Field

Sound–Structure Coupling Analysis of Multi-Flexible Plates Enclosure

2012 ◽  
Vol 479-481 ◽  
pp. 1329-1333
Author(s):  
Zhi Chen Li ◽  
Nan Chen ◽  
Lin Ning Gu
Keyword(s):  
Energy Transfer ◽  
Wave Energy ◽  
Noise Control ◽  
Research Work ◽  
Field Analysis ◽  
Flexible Plate ◽  
Coupling Field ◽  
Transfer Path ◽  
Acoustic Cavity ◽  
Sound Structure

The research on enclosure noise control is caused more and more attention. The key of noise control is to grasp physical essence about enclosure sound-structure coupling field. The research work has been carried out on a enclosure model of two simly supported flexible plate and four rigid plates. The research is focused on sound –structure coupling field analysis of the enclosure when applying primary forces on two flexible plate simutaneously. At the constraint condition of average acoustic potential energy(AAPE) formulars of enclosure sound–structure coupling field is derivated. The simulation show the follow conclusion: first, the wave energy transfer path is from primary force flexible plate to acoustic cavity, then to another flexible plate, and then feedback to acoustic cavity. Second, when structural natural frequences are the same as acoustic natural frequencies of the enclosure, the noise reach the maximum value. The third, when applying primary force on Plate a and on Plate b simutaneously, the wave energy transfer path and The relation of sound-structure coupling are more complex than only applying force on one plate.

Coupled Numerical Analysis of Flow-Temperature Field of Marine Generator

2013 ◽  
Vol 341-342 ◽  
pp. 1397-1402 ◽  
Author(s):  
Shou Guang Yao ◽  
Fei Liu ◽  
Dong Sheng
Keyword(s):  
Temperature Field ◽  
Numerical Analysis ◽  
Air Gap ◽  
Field Analysis ◽  
Analysis Method ◽  
Flow Temperature ◽  
Flow Passage ◽  
Coupling Field ◽  
Volume Method ◽  
Generator Stator

In the present paper, the coupling numerical analysis of 3D flow field and temperature field inside a marine generator was analyzed based on coupling field analysis method. The overall flow-temperature field models consist of the marine generator stator and rotor and flow passage and the air gap. Numerical analysis of flow-temperature field of marine generator were simulated by the finite volume method. The velocity and pressure distribution of fluid inside flow passage and the temperature field distribution of stator and rotor of marine generator were obtained. The present results showed that, the coupling field analysis method of overall flow-temperature field with air gap, stator and rotor can reflect the complexity of the air flow more clearly, and the value of flow and temperature field were more reliable. The results also contribute theoretical basis on optimization of ventilation struture of generator.

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