scholarly journals The numeric evaluation of the magnetic field produced by a rotor with alternating poles

2005 ◽  
Vol 2 (2) ◽  
pp. 181-188
Author(s):  
Marian Greconici ◽  
Constantin Blaj ◽  
Barbu Nicoară
Keyword(s):  
Magnetic Field ◽  
Finite Element Method ◽  
Finite Element ◽  
Magnetic Fluid ◽  
The Finite Element Method ◽  
3D Fem ◽  
Hydrostatic Bearing ◽  
Magnetic Poles ◽  
The Magnetic Field ◽  
Element Method

The magnetic field produced by a rotor with alternating magnetic poles in a magnetic fluid hydrostatic bearing is numerically evaluated. There has been used a 3D program based on the finite element method (3D-FEM).

Design and Analysis of a Novel 2-D Permanent Magnet Array for Planar Actuator

2013 ◽  
Vol 416-417 ◽  
pp. 253-257
Author(s):  
Liang Guo ◽  
Hao Ding
Keyword(s):  
Magnetic Field ◽  
Finite Element Method ◽  
Finite Element ◽  
Magnetic Fields ◽  
Permanent Magnet ◽  
3D Finite Element ◽  
3D Finite Element Method ◽  
Magnetic Poles ◽  
The Magnetic Field ◽  
Element Method

A novel 2-D permanent magnet array for a planar actuator was proposed, in which the portion between adjacent magnetic poles was divided to four small rectangular solids. Magnetic fields of the permanent magnet array were analyzed systematically by 3D finite element method. The analysis results show that, compared with the well-known Halbach magnet array, the proposed array has higher permanent magnet utilization. Keeping the whole permanent magnet volume constant, the arrays with several improved structures were put forward. The magnetic field analyze results prove that the utilization is best, when the ratio between the height of the magnetic poles magnetized vertically and the height of the portion magnetized horizontally is about 2.

scholarly journals Static force characteristics of electromagnetic actuators for Braille screen

2011 ◽  
Vol 24 (2) ◽  
pp. 157-167 ◽  
Author(s):  
Ivan Yatchev ◽  
Krastio Hinov ◽  
Iosko Balabozov ◽  
Kristina Krasteva
Keyword(s):  
Magnetic Field ◽  
Finite Element Method ◽  
Finite Element ◽  
Permanent Magnet ◽  
Static Force ◽  
The Finite Element Method ◽  
Electromagnetic Actuators ◽  
Minimum Force ◽  
The Magnetic Field ◽  
Force Characteristics

Several constructions of electromagnetic actuators with moving permanent magnet for Braille screen are studied. All they are formed from a basic one that consists of two coils, core and moving permanent magnet. The finite element method is used for modeling of the magnetic field and for obtaining the electromagnetic force acting on the mover. The static force-stroke characteristics are obtained for four different constructions of the actuator. The constructions with ferromagnetic disc between the coils ensure greater force than the ones without disc and can reach the required minimum force.

Finite-Element Analysis of Magnetoelastic Buckling of Ferromagnetic Beam Plate

1980 ◽  
Vol 47 (2) ◽  
pp. 377-382 ◽  
Author(s):  
K. Miya ◽  
T. Takagi ◽  
Y. Ando
Keyword(s):  
Magnetic Field ◽  
Finite Element Method ◽  
Finite Element Analysis ◽  
Finite Element ◽  
Experimental Results ◽  
The Finite Element Method ◽  
Magnetic Torque ◽  
Element Analysis ◽  
Element Method

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.

The Comparison of Magnetic Leakage of Different Teeth Structures in Magnetic Fluid Seal

2011 ◽  
Vol 197-198 ◽  
pp. 314-317 ◽  
Author(s):  
Fei Fei Xing ◽  
De Cai Li ◽  
Wen Ming Yang ◽  
Xiao Long Yang
Keyword(s):  
Magnetic Field ◽  
Finite Element Method ◽  
Finite Element ◽  
Theoretical Model ◽  
Field Distribution ◽  
Magnetic Fluid ◽  
Magnetic Field Distribution ◽  
Two Sides ◽  
The Magnetic Field ◽  
Sealing Gap

Based on the theoretical model, magnetic field distribution of rectangular teeth, two-sides dilated shape and one-side dilated shape teeth structure with common other conditions were calculated using finite element method when the sealing gap was 0.1mm and 0.12mm. The comparison of their results with the same sealing gap showed that rectangular teeth structure had the highest magnetic leakage. Moreover, the magnetic field distribution of sealing structures with rectangular stages on both the shaft and pole pieces under the same design and sealing gap were also calculated using the same method, whose result was compared with rectangular stages on pole pieces only. The comparison showed that the former did not have higher pressure capability obviously but led to higher magnetic leakage.

Thermal and Magnetisms Design of an Inductor Using Finite Element Method

2012 ◽  
Vol 622-623 ◽  
pp. 130-135
Author(s):  
K.K. Boo ◽  
Ovinis Mark ◽  
Nagarajan Thirumalaiswamy
Keyword(s):  
Magnetic Field ◽  
Finite Element Method ◽  
Finite Element ◽  
Thermal Stress ◽  
Magnetic Flux ◽  
Thermal Transition ◽  
The Finite Element Method ◽  
Element Method

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.

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