The Analysis of Magnetic Field Intensity and Induced Current under Live Working Based on the Finite Element Method

Author(s):  
Yuanxiang Luo ◽  
Ruiguo Chen ◽  
Yidong Zhu ◽  
Jingui Cheng ◽  
Meixia Wei
1980 ◽  
Vol 47 (2) ◽  
pp. 377-382 ◽  
Author(s):  
K. Miya ◽  
T. Takagi ◽  
Y. Ando

Some corrections have been made hitherto to explain the great discrepancy between experimental and theoretical values of the magnetoelastic buckling field of a ferromagnetic beam plate. To solve this problem, the finite-element method was applied. A magnetic field and buckling equations of the ferromagnetic beam plate finite in size were solved numerically assuming that the magnetic torque is proportional to the rotation of the plate and by using a disturbed magnetic torque deduced by Moon. Numerical and experimental results agree well with each other within 25 percent.


2012 ◽  
Vol 622-623 ◽  
pp. 130-135
Author(s):  
K.K. Boo ◽  
Ovinis Mark ◽  
Nagarajan Thirumalaiswamy

Thermal stress points in an inductor can cause insulation deterioration and ageing, leading to winding faults, while high magnetic flux causes interference. In this paper, the thermal and magnetic behaviors of inductors with different winding geometries are investigated using the Finite Element Method (FEM) based on 2-Dimension and 3-Dimension model of an inductor. Inductors with different winding geometries have different thermal envelopes and the geometry with the slowest thermal transition has fewer thermal stress points potentially reducing winding faults at the conductor. Furthermore, slow thermal transition would result in greater magnetic field coverage with no magnetic flux outside boundary of the inductor.


2012 ◽  
Vol 4 (1) ◽  
pp. 63-66
Author(s):  
Audrius Grainys

The article describes the possibility of generating a micro and sub-microsecond magnetic impulse reaching 1–10 T, investigates various configurations of microcoils and discusses the principal circuit of a magnetic field impulse generator of microsecond duration. The transient processes of current, temperature and magnetic field are calculated applying the finite element method. Santrauka Nagrinėjamas mikrosekundinės ir submikrosekundinės trukmės magnetinių impulsų, siekiančių 1–10 T, generavimas. Pateikta mikrosekundės trukmės magnetinių impulsų generatoriaus, kuris susideda iš mikroritės, mažą parazitinį induktyvumą turinčio kondensatoriaus ir greitų didelės galios MOSFET raktų principinė valdymo schema. Pereinamiesiems srovės, įtampos, elektromagnetinio lauko ir termodinaminiams vyksmams gauti taikomi analizinis ir baigtinių elementų skaičiavimo metodai. Straipsnyje pateikti elektromagnetinio lauko pasiskirstymo skaičiavimo rezultatai.


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