scholarly journals The Research and Application of MRF Magnetic Circuit Design

2015 ◽  
Vol 9 (1) ◽  
pp. 241-245
Author(s):  
Yuan Shu ◽  
Ren Hongjuan ◽  
Luo Yiping
Keyword(s):  
Magnetic Field ◽  
Circuit Design ◽  
Test Bench ◽  
Magnetic Circuit ◽  
Magnetorheological Fluid ◽  
Theoretical Research ◽  
Circuit Structure ◽  
Magneto Rheological

In this paper, the lord magnetic field of MRF and its circuit design are mainly expounded, according to the loading ways of magnetic field and the magnetic circuit design plans of magneto-rheological fluid devices at present, the general form and characteristics are summarized. In addition, a kind of magneto-rheological fluid dynamometer is proposed in this paper, in terms of its magnetic circuit structure, a magnetic-field-lord test bench about magnetorheological fluid is designed; a preliminary theoretical research is also given in order to improve the performance of magneto-rheological fluid dynamometer.

Magnetorheological Fluid for Levitation Migration Technology

2010 ◽  
Vol 148-149 ◽  
pp. 826-831
Author(s):  
Xu Lin Hu ◽  
Yang Guang ◽  
Pan Chao Cui
Keyword(s):  
Magnetic Field ◽  
Field Strength ◽  
Circuit Design ◽  
Magnetic Fluid ◽  
Magnetic Force ◽  
Magnetic Circuit ◽  
Magnetorheological Fluid ◽  
Directional Migration ◽  
Dispersed Particles ◽  
The Magnetic Field

The dispersed particles of magnetic fluid form stable chain-like clusters under the magnetic field, and shows “the flowing is controllable and the shape is controllable” effect. Based on this characteristic, using migration magnetic acted on the magnetic fluid, the object directional migration can be realize, then the magnetic fluid form ribbon at the same time, has the similar fluctuation behavior. The magnetic fluid aerosol migration principle, the aerosol magnetic circuit design, the magnetic field strength and the magnetic force were separately discussed in this paper. The magnetic fluid hover height using the MSL micrometer dial has determined and aerosol migration feasibility has confirmed using the experiment.

Influence of Load and Air Gap Dimension on Magnetic Field and Magnetic Circuit Design of a Hightorque Stepmotor

1995 ◽  
pp. 343-346
Author(s):  
Wagner Juraj ◽  
Maga Dušan ◽  
Guba Roman ◽  
Führichová Renáta ◽  
Opaterný Jozef
Keyword(s):  
Magnetic Field ◽  
Circuit Design ◽  
Magnetic Circuit ◽  
Air Gap

scholarly journals Magnetic Circuit Design and Magnetic Field Finite Element Analysis of Converging Stepped Magnetofluid Seal with Small Clearance

2020 ◽  
Vol 2020 ◽  
pp. 1-10
Author(s):  
Xiaolong Yang ◽  
Guohong Wang ◽  
Ruibo Zhang
Keyword(s):  
Magnetic Field ◽  
Finite Element Method ◽  
Finite Element ◽  
Circuit Design ◽  
Magnetic Circuit ◽  
Element Analysis ◽  
Small Clearance ◽  
Calculation Results ◽  
Theoretical Pressure ◽  
Element Method

The stepped magnetofluid seal is an effective method for improving the pressure ability of ordinary magnetofluid seals (OMS) with large clearance. At present, the research on stepped magnetofluid seal with less than 0.4 mm small clearance has not been carried out yet. The equivalent magnetic circuit design of converging stepped magnetofluid seal (CSMS) with small clearance has been carried out and verified by magnetic field finite element method based on the CSMS theory and magnetic circuit theory. The effects of the width of the axial seal position, the height of the radial seal position, the number of the pole tooth in the axial seal position, and the number of the pole tooth in the radial seal position on the theoretical pressure ability of the CSMS are investigated by numerical simulation. The calculation results are analyzed and discussed. The results show that the magnetic flux leakage at the junction of the permanent magnet and pole piece causes the higher pressure ability of the CSMS structure designed by the equivalent magnetic circuit method than that calculated by the magnetic field finite element method. When the width of the axial seal position is greater than the height of the radial seal position and the number of pole teeth in the axial seal position is less than the number of pole teeth in the radial seal position, the CSMS has the best effect. Compared with OMS with small clearance, CSMS has greater advantages.

Design and experimental study of the porous foam metal magnetorheological fluid damper based on built-in multi-pole magnetic core

2020 ◽  
Vol 31 (5) ◽  
pp. 687-703 ◽  
Author(s):  
Dan Zhao ◽  
Jianbin Zhao ◽  
Zhenghang Zhao ◽  
Yang Liu ◽  
Shaogang Liu ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Magnetic Circuit ◽  
Magnetorheological Fluid ◽  
Effective Area ◽  
Magnetic Core ◽  
Damping Force ◽  
Output Performance ◽  
Magnetorheological Fluid Damper ◽  
Fluid Damper ◽  
Foam Metal

The porous foam metal magnetorheological fluid damper has a broad application prospect in the field of vibration isolation of precision instruments with small damping force because it does not need complex dynamic seal structure. The traditional single-ring magnetic pole porous foam metal magnetorheological fluid damper has a small effective area for the magnetic core that affects the damper output range due to the geometric constraints of the coil and the low magnetic field utilization. Therefore, in order to increase the effective area ratio of the magnetic core, this article introduces the built-in multi-pole magnetic core into the porous metal magnetorheological fluid damper and integrates four axial wound fan-shaped magnetic poles on the magnetic core to improve the output performance of the damper. The magnetic circuit is analyzed based on Ohm’s law of magnetic circuit, and the mathematical model of damping force is established. Based on this, the important geometric parameters of the damper are determined. The finite element method is used to simulate the magnetic field of the damper, and the output performance of the damper is numerically simulated. The dynamic performance test system of the damper is set up to test the designed damper, and the test data and numerical simulation results are verified with each other. The results show that the damping force peak and dynamic regulation range of the damper designed in this article are higher than those of the traditional porous foam metal magnetorheological fluid damper with magnetic core, which effectively improves the mechanical properties of the magnetorheological fluid damper with porous foam metal.

Development of a double magnetic circuit yield stress measurement device for magnetorheological fluid

2016 ◽  
Vol 28 (10) ◽  
pp. 1249-1259 ◽  
Author(s):  
Xiang-Fan Wu ◽  
Xing-Ming Xiao ◽  
Zu-Zhi Tian ◽  
Fei Chen ◽  
Jian Wang ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Yield Stress ◽  
Magnetic Circuit ◽  
Stress Measurement ◽  
Magnetorheological Fluid ◽  
High Yield ◽  
Magnetic Field Measurement ◽  
Measurement Device ◽  
Accuracy And Repeatability ◽  
The Magnetic Field

On the basis of shear working mode of magnetorheological fluid, in this article, a novel temperature controllable yield stress measurement device is designed, and the double magnetic circuit structure and the heating structure are proposed. And then, the magnetic field and temperature field of the measurement device are simulated, respectively, by the finite element method. Furthermore, several experiments are carried out to evaluate the magnetic field, measurement precision, and repeatability of the self-designed device. The results indicate that the proposed measurement device has uniform magnetic field distribution and controllable temperature and also has high yield stress testing accuracy and repeatability.

scholarly journals Magnetic Field Effect in the Process of Rinsing a Magnetic Separator Matrix

1988 ◽  
Vol 2 (3) ◽  
pp. 119-136
Author(s):  
Jiri Galas
Keyword(s):  
Magnetic Field ◽  
Magnetic Fields ◽  
Circuit Design ◽  
Field Effect ◽  
Magnetic Circuit ◽  
Magnetic Field Effect ◽  
Magnetic Separator ◽  
High Gradient ◽  
First Time

This paper surveys fundamental aspects of the problem of rinsing matrices in high gradient magnetic separators. This is done, for the first time, in terms of the magnetic circuit design. Equations have been constructed to describe the effects of spurious remanent magnetic fields on the rinsing process.

Development of Permanent Magnet Generator Used for Magnetic Field Assisted Micro Electroforming Technology

2014 ◽  
Vol 936 ◽  
pp. 1716-1719 ◽  
Author(s):  
Hui Juan Li ◽  
Ping Mei Ming ◽  
Xiao Hui Bao ◽  
Xiao Dong Zhang ◽  
Xiang Yang Bi
Keyword(s):  
Magnetic Field ◽  
Permanent Magnet ◽  
Uniform Magnetic Field ◽  
Magnetic Circuit ◽  
Geometrical Shape ◽  
Electroforming Process ◽  
Fundamental Process ◽  
Circuit Structure ◽  
Permanent Magnet Generator

To provide appropriately high and uniform magnetic field for micro electroforming process, a permanent magnet generator was specially developed which based on the fundamental process requirements. On the basis of determining the number of permanent magnet combinations numerically. Mainly, the geometrical shape of the permanent magnet blocks and magnetic circuit structure were optimized, and then the working gap regulating mechanism for this generator was designed. Utilizations indicated that the developed generator met the requirements well.

Magnetic circuit design for magneto-rheological damper

2010 ◽  
Vol 33 (1-2) ◽  
pp. 815-822 ◽  
Author(s):  
Jinglin Luo ◽  
Baokun Yang ◽  
Longlei Dong
Keyword(s):  
Circuit Design ◽  
Magnetic Circuit ◽  
Magneto Rheological

scholarly journals Theoretical Computational Model for Cylindrical Permanent Magnet Coupling

Electronics ◽  
2021 ◽  
Vol 10 (16) ◽  
pp. 2026
Author(s):  
Ke Sun ◽  
Jianwen Shi ◽  
Wei Cui ◽  
Guoying Meng
Keyword(s):  
Magnetic Field ◽  
Computational Model ◽  
Permanent Magnet ◽  
Test Bench ◽  
Magnetic Circuit ◽  
Element Simulation ◽  
Current Characteristics ◽  
Induce Eddy Current ◽  
Air Gap Magnetic Field ◽  
The Magnetic Field

Permanent magnet coupling is extensively studied owing to its economic efficiency and stability. In this study, a computational model for cylindrical permanent magnet coupling (CPMC) was designed using the magnetic field division method to divide an air gap magnetic field. An equivalent magnetic circuit model was also designed based on the equivalent magnetic circuit method. The novelty of this study is that both the skin effect and the working point of the permanent magnet are taken into consideration to obtain the magnetic circuit and induce eddy current characteristics of permanent magnet coupling. Furthermore, a computational model was obtained for the transmission torque of the CPMC based on the principles of Faraday’s and Ampere’s laws. Additionally, the accuracy of the model was verified using a finite element simulation model and a test bench.

Sign in / Sign up

Export Citation Format

Share Document