Development of a Magneto-Rheological Fluid Tension Control Device

2009 ◽  
Vol 419-420 ◽  
pp. 225-228
Author(s):  
Gang Li ◽  
Yu Sun ◽  
Cheng Bin Du
Keyword(s):  
Magnetic Particle ◽  
Magnetic Circuit ◽  
Control Device ◽  
Structure Design ◽  
Tension Control ◽  
Element Analysis ◽  
Bingham Plastic ◽  
Output Torque ◽  
New Type ◽  
Magneto Rheological

Based on the characteristics of magneto-rheological fluid, a new type of transmission device has been developed in this paper, in which output torque can be controlled accurately by adjusting electric current. It can be applied to replace magnetic particle clutch widely used at present to achieve tension control in some small-sized winders. A structure design of prototype has been proposed. By using the Bingham plastic constitutive model, the output torque of the device has been derived. Electromagnetic finite element analysis has been employed to simulate the magnetic circuit of this magneto-rheological fluid tension control device. It is shown that this magneto-rheological fluid tension control transmission has its significant advantages comparing with traditional magnetic particle clutch. The new one can produce higher controllable torques, and may be applied widely in the future.

scholarly journals A rotary magneto-rheological torque converter for tension regulation

2018 ◽  
Vol 10 (11) ◽  
pp. 168781401881230 ◽  
Author(s):  
Li Gang ◽  
Du Cheng-bin ◽  
Feng Yong
Keyword(s):  
Magnetic Particle ◽  
Torque Converter ◽  
Tension Control ◽  
Control Field ◽  
Element Analysis ◽  
New Device ◽  
Output Torque ◽  
Magneto Rheological ◽  
Winding Tension ◽  
Tension Regulation

In this article, a drum type of transmission device has been developed, which is a double-layer cylinder structure. The working clearance between the inner and the external layers of the device has been filled with intelligent material named magneto-rheological fluid. To use it for tension regulation, theoretical model of its output torque has been constructed based on Bingham’s theory, and the coupling relationship between mechanical structure, electromagnetic circuit, and magneto-rheological fluid is analyzed and simulated using finite element analysis. Higher flux is directed onto the magneto-rheological fluid and greater shear frictions are generated subsequently. The design is practical, and a special seal mechanism which is a combination of magnetic seals and labyrinthine seals is applied in this research to improve sensitivity and to reduce leakage of the device. Then, experiments on prototype indicate that this device has significant advantages of quicker response, larger output, and less heat compared to traditional magnetic particle clutch and some existing disk-type magneto-rheological brakes which were recently reported. The new device may be applied widely in the related winding tension control field in the future.

Design and investigation of a novel magnetorheological brake with coils directly placed on side housings using a separating thin wall

2021 ◽  
pp. 1045389X2199391
Author(s):  
Ngoc Diep Nguyen ◽  
Tan Tien Nguyen ◽  
Dai Hiep Le ◽  
Quoc Hung Nguyen
Keyword(s):  
Magnetic Circuit ◽  
Outer Part ◽  
Thin Wall ◽  
Improve Performance ◽  
Element Analysis ◽  
Bingham Plastic ◽  
Braking Torque ◽  
Experimental Works ◽  
Magneto Rheological ◽  
Inner Parts

This research focuses on a new design to facilitate the manufacturing and improve performance of magneto-rheological brake (MRB). In this proposed MRB, the coils are directly placed on inner part of the side housing of the MRB and separated with the working MR fluid by a thin wall. The coils are then covered by the outer part of side housing to form a closed magnetic circuit. With this configuration, the coils do not directly contact with the MRF therefore a very small MRF gap size can be archived. In addition, the coils can be assembled and disassembled in the housing without separating the inner parts of the housing out of the disc. This makes a lot of convenience in fabrication, testing and maintenance of the MRB. After a review of MRB development, configuration of the proposed MRB is presented. Braking torque of the proposed MRB is then derived based on Bingham-plastic rheological model of MRF. Based on finite element analysis, optimal design of the proposed MRB is then conducted. The results are then compared with other types of MRB to figure out the advanced performance characteristics of the proposed one. In order to validate simulated results, prototypes of the proposed MRBs are manufactured and experimental works are then conducted.

Development of High Damping Magneto-Rheological Mount for Ship Engines

2013 ◽  
Vol 336-338 ◽  
pp. 953-959 ◽  
Author(s):  
Quoc Hung Nguyen ◽  
Do Xuan Phu ◽  
Joon Hee Park ◽  
Seung Bok Choi ◽  
Ok Hyun Kang
Keyword(s):  
Magnetorheological Fluid ◽  
Governing Equations ◽  
Damping Force ◽  
Element Analysis ◽  
Bingham Plastic ◽  
Force Ratio ◽  
Valve Structure ◽  
Engine Mount ◽  
Magneto Rheological ◽  
State Force

In this paper, novel configurations of a compact and high damping force engine mount featuring magnetorheological fluid (MRF) is proposed and analyzed. In the mount, a MR valve structure with both annular and radial flows is employed to generate a high damping force. Firstly, several configurations of the MR mount are proposed. The MRF flows in the mount are then analyzed and the governing equations of the MR mount are then derived based on Bingham plastic behaviour of the MRF. Optimal design of the proposed MR mount is then considered. In the optimization, the objective is to find out the optimal structure of the MR mount that can generate a maximum damping force while the off-state force of the mount is constrained in such a manner that the force ratio of the mount is greater than a required value. Performance of the optimized MR mount is then evaluated based on finite element analysis and validated by experimental results.

scholarly journals Design and Research of a Three-Phase AC Magnetic Separator for Coal Desulfurization and Ash Reduction

2020 ◽  
Vol 10 (8) ◽  
pp. 2871
Author(s):  
Min Cao ◽  
Yan Chen ◽  
Chunyan Ma ◽  
Qiang Liu
Keyword(s):  
Magnetic Particle ◽  
Structure Design ◽  
Total Energy Consumption ◽  
Coal Consumption ◽  
Element Analysis ◽  
Magnetic Separator ◽  
Coal Desulfurization ◽  
Three Phase ◽  
Ash Removal ◽  
Simulation Results

China’s total coal consumption accounts for 50% of total energy consumption. However, every ton of coal in the process of production and use will bring huge losses to the environment. Desulfurization and ash removal of coal have been a continuous focus of researchers in various countries. The three-phase alternating current (AC) magnetic separator is a device for desulfurization and ash reduction of coal based on the principle of generating an alternating magnetic field generated by a three-phase flat linear motor. It is optimized by finite element analysis and its electromagnetic thrust is improved by 114% after optimization. Factors such as current size, magnetic particle size, and installation angle of the device are also analyzed. The simulation results show that the structure design of the three-phase AC magnetic separator is reasonable.

Development of Magnetorheological Brake with Tooth-Shaped Disc for Small Size Motorcycle

2019 ◽  
Vol 889 ◽  
pp. 508-517
Author(s):  
Duc Thang Le ◽  
Ngoc Diep Nguyen ◽  
Duy Tuan Le ◽  
Ngoc Tuyen Nguyen ◽  
Van Vinh Pham ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Finite Element Analysis ◽  
Element Analysis ◽  
Braking Performance ◽  
Trapezoidal Shape ◽  
Braking Torque ◽  
New Type ◽  
Magneto Rheological ◽  
Magnetic Poles ◽  
Multiple Poles

In this research, a new type of magneto-rheological brake (MRB) is proposed for small size motorcycle. The proposed MRB consists of a rotor with multiple trapezoidal teeth acting at multiple magnetic poles of the brake. In order to generate a magnetic field for controlling braking torque, a magnetic coil is placed on each side-housing of the brake. The inner face of each side-housing also has trapezoidal shape mating with the trapezoidal teeth of the rotor via MRF layer. By applying countercurrents to the coils, a magnetic fluid is generated with some magnetic flux going across the MRF layer (MRF duct) between the rotor teeth and their mating poles on the housing. By using multiple poles with trapezoidal shape, a high braking torque of the brake is expected while the size of the brake is still kept to be compacted. After an introduction about the development of MRBs in automotive engineering, the configuration of the proposed MRB is presented and its braking torque is derived based on Bingham rheological model of MRF. The proposed MRB is then optimally designed based on finite element analysis (FEA). Its optimized MRB is then manufactured and its braking performance is experimentally investigated. The MRB is then installed in a prototype motorcycle and the field test of this prototype motorcycle integrated with the MRB is then conducted.

scholarly journals Improvement of Energy Density in Single Stator Interior Permanent Magnet Using Double Stator Topology

2014 ◽  
Vol 2014 ◽  
pp. 1-15 ◽  
Author(s):  
Raja Nor Firdaus ◽  
Norhisam Misron ◽  
Chockalingam Aravind Vaithilingam ◽  
Masami Nirei ◽  
Hiroyuki Wakiwaka
Keyword(s):  
Energy Density ◽  
Permanent Magnet ◽  
Magnetic Circuit ◽  
Structure Design ◽  
Analysis Tool ◽  
Element Analysis ◽  
Magnetomotive Force ◽  
Interior Permanent Magnet ◽  
Conventional Structure ◽  
Best Fit

The paper presents the energy density improvement using magnetic circuit analysis of the interior permanent magnet motor. The leakage flux from the conventional structure is improved with modified magnetic circuit to improve the energy and thereby the torque value. This is approached with a double stator structure design. The proposed structure is investigated with two design variations, namely, the double stator with thin pole shoe and the double stator with thick pole shoe motors. Variations in the mechanical parameters of the all the developed models are analyzed through the finite element analysis tool. In all investigations the magnetic source is fixed in both the permanent magnet volume and coil magnetomotive force, respectively, as 400 mm3per each pole and 480 Ampere turns per pole. From the analysis the best fit magnetic structure based on the torque characteristics is derived and is fabricated for the same volume as that of the conventional structure for performance evaluations. It is found out that there is improvement on the motor constant square density for the proposed improved magnetic circuit through the best fit double stator with thick pole shoe by about 83.66% greater than that of the conventional structure.

Optimal Design of an Hybrid Magnetorheological Brake for Middle-Sized Motorcycles

2011 ◽  
Vol 52-54 ◽  
pp. 371-377 ◽  
Author(s):  
Quoc Hung Nguyen ◽  
Jun Cheol Jeon ◽  
Seung Bok Choi
Keyword(s):  
Optimal Design ◽  
Magnetic Circuit ◽  
Optimization Procedure ◽  
Zero Field ◽  
Element Analysis ◽  
Mr Fluid ◽  
The Finite Element Analysis ◽  
Hybrid Concept ◽  
Braking Torque ◽  
Magneto Rheological

This research focuses on developing a new configuration and optimal design of magneto-rheological (MR) brake for a middle-sized motorcycle which can replace conventional drum-type brake. The proposed MR brake mechanism utilizes a hybrid concept of magnetic circuit (using both axial and radial magnetic flux) to generate braking force. In the optimization, the required braking torque, the temperature due to zero field friction of MR fluid, the mass of the brake system and all significant geometric dimensions are considered. After a brief introduction of the proposed MR brake configuration, the braking torque is derived based on Herschel-Bulkley rheological model of the MR fluid. The optimal design of the MR brake is then analyzed. An optimization procedure based on the finite element analysis (FEA) integrated with an optimization tool is used to obtain optimal geometric dimensions of the MR brake. From the results, discussions on the performance improvement of the optimized MR brake are described.

Frequency response analysis of magneto-rheological clutch designs

2017 ◽  
Vol 29 (5) ◽  
pp. 905-923 ◽  
Author(s):  
Peyman Yadmellat ◽  
Rajni V Patel
Keyword(s):  
Frequency Response ◽  
Eddy Currents ◽  
Magnetic Circuit ◽  
Design Parameters ◽  
Response Analysis ◽  
Frequency Response Analysis ◽  
Element Analysis ◽  
Trade Offs ◽  
Torque Capacity ◽  
Magneto Rheological

This article presents the frequency response analysis performed on two different geometrical configurations of magneto-rheological clutches including disk-based and drum-based configurations. For each configuration, two sub-configurations with inner coil and outer coil designs are studied. The configurations are thoroughly studied with respect to the effect of design parameters on the bandwidth of magneto-rheological clutches using finite element analysis and by considering the effect of eddy currents and the skin effect in the magnetic circuit. The N-way analysis of variance is used to study the effect of the main parameters as well as interaction between the parameters on the bandwidth. Furthermore, trade-offs between the effect of the main parameters and the torque capacity are discussed.

scholarly journals Optimization Design of a New Type of Interior Permanent Magnet Generator for Electric Vehicle Range Extender

2019 ◽  
Vol 2019 ◽  
pp. 1-10 ◽  
Author(s):  
Shilun Ma ◽  
Xueyi Zhang ◽  
Qinjun Du ◽  
Liwei Shi ◽  
Xiangyu Meng
Keyword(s):  
Permanent Magnet ◽  
Optimization Design ◽  
Magnetic Circuit ◽  
Magnetic Flux Density ◽  
Element Analysis ◽  
Magnetic Circuits ◽  
Range Extender ◽  
Interior Permanent Magnet ◽  
Rotor Poles ◽  
New Type

Aiming at the disadvantages of large leakage flux and low magnetic flux density of radial magnetic circuit and tangential magnetic circuit, a new type of permanent magnet (PM) rotor with parallel tangential and radial magnetic circuits is proposed. Based on Ohm’s law and Kirchhoff’s law of magnetic circuits, equivalent magnetic circuits for rotor poles are developed. The structure parameters of the generator are preliminarily determined. At the same time, by means of the Taguchi method and employing finite element analysis, the rotor poles of generator are optimized to improve air gap magnetic density, the cogging torque, and the distortion of back-EMF waveform. Finally, the validity of proposed design methods is validated by the analytical and experimental results.

Structure Design and Finite Element Analysis of a New Type Metallic-Disc Flexible Coupling for Diesel Generator Set

2012 ◽  
Vol 562-564 ◽  
pp. 680-683
Author(s):  
Xu Guang Min ◽  
Guo Liang Hu
Keyword(s):  
Simulation Analysis ◽  
Structure Design ◽  
Diesel Generator ◽  
Ansys Software ◽  
Theory Analysis ◽  
Element Analysis ◽  
Flexible Coupling ◽  
New Type ◽  
Working Principle ◽  
Rubber Component

Aiming at the shortcomings of fixed coupling and flexible coupling with rubber component used in the diesel generator set, a new type of metallic-disc flexible coupling for diesel generator set of 500kW power was designed. The working principle and theory analysis of the metallic-disc flexible coupling were expounded in detail. The simulation analysis was carried out to determine the optimal numbers and thickness of the metallic-disc using ANSYS software. The relevant results can provide some guidance for the improvement design of domestic diesel generator set.

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