Investigation on magnetic properties of orientated nanocomposite Pr2Fe14B/α-Fe permanent magnets by micromagnetic finite-element method

2012 ◽  
Vol 324 (22) ◽  
pp. 3853-3858 ◽  
Author(s):  
Shu-li He ◽  
Hong-wei Zhang ◽  
Chuan-bing Rong ◽  
Juan Chen ◽  
Ji-rong Sun ◽  
...  
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Magnetic Properties ◽  
Permanent Magnets ◽  
Element Method

Torque Characteristic Analysis of an IM/PM Hybrid Motor by Using Finite Element Method

2014 ◽  
Vol 792 ◽  
pp. 337-342 ◽  
Author(s):  
Shingo Iwao ◽  
Takashi Todaka ◽  
Masato Enokizono
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Induction Motor ◽  
Permanent Magnets ◽  
Two Dimensional ◽  
Characteristic Analysis ◽  
Dimensional Finite Element ◽  
Terminal Voltage ◽  
Hybrid Motor ◽  
Element Method

This paper presents torque characteristic analysis of synchronous induction motors called “IM/PM hybrid motors” by using the two-dimensional finite element method taking terminal voltage into account. The slip characteristics are analyzed by using multi-meshes corresponding to each rotor position, because the transient numerical analysis is quite difficult due to slip even two-dimensional analysis. There are many researches on IM/PM hybrid motors, however the torque characteristics when they are operating as an induction motor have not yet examined sufficiently. In this paper, we tried to explore how to improve the torque characteristics even operating as an induction motor by incorporating the embedded permanent magnets. The results show that the arrangement of the permanent magnets is very important to improve whole torque characteristics.

MAGNETORHEOLOGY OF A MILLIMETRIC STEEL SPHERES SUSPENSION

2002 ◽  
Vol 16 (17n18) ◽  
pp. 2758-2764 ◽  
Author(s):  
G. BOSSIS ◽  
O. VOLKOVA ◽  
S. LACIS ◽  
M. GUYOT
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Magnetic Properties ◽  
Shear Rate ◽  
Yield Stress ◽  
Precise Measurement ◽  
Affine Model ◽  
Element Method

The magnetorheology of a "suspension" of millimetric-size steel spheres in oil has been studied. After a precise measurement of the magnetic properties of the particles we show that the yield stress is well characterized and that it can be predicted by a finite element method and a non-affine model where the chains break in the middle. Some experiments in microgravity confirm that the sedimentation does not alter our results and also shows that the magnetic stress decreases with the shear rate.

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