Reconstruction of two-dimensional magnetization and susceptibility distributions from the magnetic field of soft magnetic materials

1996 ◽  
Vol 32 (1) ◽  
pp. 230-234 ◽  
Author(s):  
Shaofen Tan ◽  
Yu Pei Ma ◽  
I.M. Thomas ◽  
J.P. Wikswo
Keyword(s):  
Magnetic Field ◽  
Magnetic Materials ◽  
Soft Magnetic Materials ◽  
Two Dimensional ◽  
Soft Magnetic ◽  
The Magnetic Field

A Simple Device for Measuring Losses in Soft Magnetic Materials

2014 ◽  
Vol 802 ◽  
pp. 579-584
Author(s):  
Wagner S. Marinho ◽  
Marcos F. de Campos ◽  
Julio C. Teixeira
Keyword(s):  
Magnetic Field ◽  
Magnetic Materials ◽  
Magnetic Induction ◽  
Electronic Device ◽  
Soft Magnetic Materials ◽  
Soft Magnetic ◽  
Soft Ferromagnetic ◽  
Rapid Characterization ◽  
The Magnetic Field

The aim of this work is the development of an electronic device for the rapid characterization of soft ferromagnetic materials for electrical purposes named singlesheettester(sst). The basis of this study consists in determining the magnetic induction, B and the magnetic field, H, by using a simplified circuit. Results are compared with classicalepsteintest and the obtained losses present an error less than 10%.

A Micro Diamagnetic Actuator for Micro Beads Levitation and Manipulation

2010 ◽  
Vol 143-144 ◽  
pp. 990-995
Author(s):  
Qun Wang ◽  
Wei Ping Zhang ◽  
Wen Yuan Chen ◽  
Feng Cui ◽  
Shi Peng Li ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Magnetic Materials ◽  
Experimental Results ◽  
Soft Magnetic Materials ◽  
Theoretic Analysis ◽  
Soft Magnetic ◽  
Main Structure ◽  
Field Control

An efficient and convenient way to levitate and manipulate micro beads is reported, in which coils and soft magnetic materials are used to generate a magnetic field. The levitation is based on diamagnetic buoyancy, and the main structure of this device is made into spiral switch arrays so as to simplify the interconnection and magnetic field control. The design, modeling and fabrication of the device for manipulation of diamagnetic beads is given in detail. Theoretic analysis and experimental results of fabrication indicate the advantages and feasibility of the proposal illustrated here.

Underwater Motor Sealing Based on Magnetic Force Coupling

2014 ◽  
Vol 875-877 ◽  
pp. 2051-2055
Author(s):  
Ding Zhong Tan ◽  
Ying Qiu ◽  
Qi Ming Wang
Keyword(s):  
Magnetic Materials ◽  
Magnetic Circuit ◽  
Active Surface ◽  
Soft Magnetic Materials ◽  
Soft Magnetic ◽  
Power Matching ◽  
Steel Material ◽  
Force Coupling ◽  
Magnetic Poles ◽  
The Magnetic Field

According to the requirements of sealing a deepwater motor on an underwater device, the overall structure of the magnetic-driven sealer is designed, and its magnetic structure is determined in this paper. The arrangement of magnet is researched and determined, a reasonable aspect ratio of the magnetic circuit is chosen as well. The problem of reasonable matching between thickness of permanent magnet and the arc of active surface of magnetic pole is analyzed, and the operating point of permanent magnetic materials is determined. The torque of magnetic circuit is calculated, the power matching and correction are studied, and the design and calculations of the torque of magnetic-driven sealer are completed, and the dimension of the overall structure is designed. Permanent magnetic materials, soft magnetic materials, yoke steel material and the materials of isolated sets are analyzed, respectively, and at last reasonable materials are chosen. Moreover, the design of isolated sets is accomplished, and the loss of eddy current and the hydraulic friction, existing on magnetic-driven sealer, are analyzed and calculated. Based on the calculation of analytical method and by using software of ANSYS, the magnetic circuit of magnetic-driven sealer is simulated and analyzed. The magnetic field distribution of model is analyzed when the angle difference, the number of the magnetic poles or thickness of yoke steel is changed, respectively. In conclusion, the simulation results are consistent with the theoretical calculation.

scholarly journals Stability of Soft Magnetic Helical Microrobots

Fluids ◽  
2020 ◽  
Vol 5 (1) ◽  
pp. 19 ◽  
Author(s):  
Kiarash Samsami ◽  
Seyed Amir Mirbagheri ◽  
Farshad Meshkati ◽  
Henry Chien Fu
Keyword(s):  
Magnetic Field ◽  
Rotating Magnetic Field ◽  
Soft Magnetic Materials ◽  
Steering Control ◽  
Soft Magnetic ◽  
Bulk Fluid ◽  
The Stability ◽  
Magnetic Microrobots ◽  
The Magnetic Field ◽  
Permanent Magnetization

Nano/microrobotic swimmers have many possible biomedical applications such as drug delivery and micro-manipulation. This paper examines one of the most promising classes of these: rigid magnetic microrobots that are propelled through bulk fluid by rotation induced by a rotating magnetic field. Propulsion corresponds to steadily rotating and translating solutions of the dynamics of such microrobots that co-rotate with the magnetic field. To be observed in experiments and be amenable to steering control, such solutions must also be stable to perturbations. In this paper, we analytically derive a criterion for the stability of such steadily rotating solutions for a microrobot made of soft magnetic materials, which have a magnetization that depends on the applied field. This result generalizes previous stability criteria we obtained for microrobots with a permanent magnetization.

Sign in / Sign up

Export Citation Format

Share Document