Development of a new magnetorheological fluid–based brake with multiple coils placed on the side housings

2018 ◽  
Vol 30 (5) ◽  
pp. 734-748 ◽  
Author(s):  
Ngoc Diep Nguyen ◽  
Thang Le-Duc ◽  
Le Dai Hiep ◽  
Quoc Hung Nguyen
Keyword(s):  
Rheological Model ◽  
Magnetorheological Fluid ◽  
Performance Characteristics ◽  
Bingham Plastic ◽  
Single Side ◽  
Compact Size ◽  
Braking Torque ◽  
Experimental Works

In this research, a new configuration of magnetorheological fluid–based brake with multiple coils placed on each side of the brake housing (multiple side-coil magnetorheological fluid–based brake) is proposed, optimally designed, and evaluated. With this configuration, the multiple side-coil magnetorheological fluid–based brake is expected to provide higher braking torque and more compact size than the traditional magnetorheological fluid–based brake. After a brief introduction about the development of magnetorheological fluid–based brake, the configuration of multiple side-coil magnetorheological fluid–based brake is proposed. Braking torque of the proposed magnetorheological fluid–based brake is then analyzed based on the Bingham plastic rheological model of magnetorheological fluid. The optimization of the proposed multiple side-coil magnetorheological fluid–based brake, the magnetorheological fluid–based brake with one coil placed on each side of the brake housing (single side-coil magnetorheological fluid–based brake), and the conventional magnetorheological fluid–based brake is then performed considering maximum braking torque and mass of the brakes. Based on the optimal results, advanced performance characteristics of the proposed magnetorheological fluid–based brake are figured out. In addition, experimental works are conducted to validate the performance of the proposed multiple side-coil magnetorheological fluid–based brake.

Development of magnetorheological brake with two coils placed on each side of the brake housing

2015 ◽  
Vol 37 (4) ◽  
pp. 263-273 ◽  
Author(s):  
Nguyen Quoc Hung ◽  
Nguyen Ngoc Diep ◽  
Nguyen Si Dzung
Keyword(s):  
Rheological Model ◽  
Magnetorheological Fluid ◽  
Performance Characteristics ◽  
Bingham Plastic ◽  
Compact Size ◽  
Braking Torque ◽  
Magneto Rheological

In this study a new configuration of magneto-rheological brake (MRB) with  two coils placed on each side of the brake housing is proposed, optimally  designed and evaluated. With this configuration, the MRB is expected to  provide higher braking torque, more compact size than traditional MRB. After  describing an introduction of the proposed configuration, braking torque of  the proposed MRB is analyzed based on Bingham-plastic rheological model of  magnetorheological fluid (MRF). The optimization of the proposed MRB, the  MRB with one coil placed on each side of the brake housing and the  conventional MRB is then performed considering maximum braking torque and  mass of the brakes Based on the optimal results, advanced performance  characteristics of the proposed MRB are figured out.

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.

Simulation and experimentation of a magnetorheological brake with adjustable gap

2016 ◽  
Vol 28 (12) ◽  
pp. 1614-1626 ◽  
Author(s):  
Wan-Li Song ◽  
Dong-Heng Li ◽  
Yan Tao ◽  
Na Wang ◽  
Shi-Chao Xiu
Keyword(s):  
Magnetorheological Fluid ◽  
Structure Design ◽  
Experimental Results ◽  
Wear Property ◽  
Braking Performance ◽  
Braking Torque ◽  
The Difference ◽  
The Impact ◽  
Theoretical Analyses ◽  
Magnetostatic Simulation

The aim of this work is to investigate the effect of the small magnetorheological fluid gap on the braking performance of the magnetorheological brake. In this article, theoretical analyses of the output torque are given first, and then the operating principle and design details of the magnetorheological brake whose magnetorheological fluid gap can be altered are presented and discussed. Next, the magnetic circuit of the proposed magnetorheological brake is conducted and further followed by a magnetostatic simulation of the magnetorheological brakes with different sizes of fluid gap. A prototype of the magnetorheological brake is fabricated and a series of tests are carried out to evaluate the braking performance and torque stability, as well as the verification of the simulation results. Experimental results show that the braking torque increases with the increase in the current, and the difference for the impact of the fluid gap on braking performance is huge under different currents. The rules, which the experimental results show, have an important significance on both the improvement of structure design for magnetorheological brake and the investigation of the wear property under different fluid gaps.

A new high-torque retarder based on combined effects of magnetorheological fluid and eddy current

2018 ◽  
Vol 30 (2) ◽  
pp. 256-271 ◽  
Author(s):  
Hui Huang ◽  
Shumei Chen ◽  
Cheng Wang
Keyword(s):  
Eddy Current ◽  
Material Selection ◽  
Magnetorheological Fluid ◽  
Experimental Result ◽  
Element Analysis ◽  
Operating Concept ◽  
Braking Torque ◽  
High Torque ◽  
The Magnetic Field ◽  
Excitation Circuit

In this article, a new high-torque retarder combining the effects of magnetorheological fluid and eddy current is researched. The new retarder provides a part of the braking torque generated by the shear stress of the magnetorheological fluid and an additional braking torque generated by the effect of the eddy current on the rotors. This operating concept is realized by a common magnetic excitation circuit generated by a new structure with several separated coils. The configurations and design details of the new retarder, including the structure, material selection, and magnetic circuit, are discussed. The mathematical models of braking torque caused by the magnetorheological fluid and eddy current are also derived. Then, a finite element analysis is performed to verify the magnetic field design of the new retarder. Finally, a prototype is fabricated, and the relevant parameters are tested. The experimental result shows that the new retarder provides not only a stable braking torque at low speed but also a great increment of braking torque varied with rotation speed, which effectively improves the total braking torque compared with conventional magnetorheological retarders.

Influence of Permanent Magnets Installation Approach on the Torque of а Magneto-Rheological Disk Brake

2021 ◽  
Vol 105 ◽  
pp. 184-193
Author(s):  
Ilya Aleksandrovich Frolov ◽  
Andrei Aleksandrovich Vorotnikov ◽  
Semyon Viktorovich Bushuev ◽  
Elena Alekseevna Melnichenko ◽  
Yuri Viktorovich Poduraev
Keyword(s):  
Magnetic Field ◽  
Magnetic Fields ◽  
Magnetic Materials ◽  
Permanent Magnets ◽  
Magnetorheological Fluid ◽  
Simulation Modelling ◽  
Disc Brake ◽  
Large Area ◽  
Braking Torque ◽  
The Magnetic Field

Magnetorheological braking devices function due to the organization of domain structures between liquid and solid magnetic materials under the action of an electromagnetic or magnetic field. The disc is most widely used as a rotating braking element that made of a solid magnetic material due to the large area of contact with a magnetorheological fluid. Many factors affect the braking characteristics of the magnetorheological disc brake. Specifically, the value of the magnetic field and how the field is distributed across the work element is significantly affected at the braking torque. There are different ways to generate a magnetic field. In this study, the method of installation of permanent magnets into the construction, allowing to increase the braking torque of the magnetorheological disc brake is proposed. Simulation modelling showing the distribution of the magnetic field across the disk depending on the installation of permanent magnets with different pole orientations were carried out. The model takes into account the possibility of increasing the gap between solid magnetic materials of the structure, inside them which the magnetorheological fluid is placed. Comparative estimation of the distribution of the magnetic fields depending on the chosen method of installation of permanent magnets with different orientations of their poles is carried out. Further research is planned to focus on a comparative assessment of the distribution of magnetic fields depending on the selected material of the braking chamber.

Effect of Stator Surface Area on Braking Torque and Wall Heat Dissipation of Magnetorheological Fluid Retarder

2020 ◽  
Author(s):  
ZhiQiang Liu ◽  
Gangfeng Tan ◽  
Zhongpeng Tian ◽  
Mi Zhou ◽  
Philip Agyeman ◽  
...  
Keyword(s):  
Surface Area ◽  
Heat Dissipation ◽  
Magnetorheological Fluid ◽  
Braking Torque

Design of a safety escape device based on magnetorheological fluid and permanent magnet

2012 ◽  
Vol 24 (1) ◽  
pp. 49-60 ◽  
Author(s):  
Bintang Yang ◽  
Tianxiang Chen ◽  
Guang Meng ◽  
Zhiqiang Feng ◽  
Jie Jiang ◽  
...  
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Permanent Magnet ◽  
Dynamic Model ◽  
Magnetic Field Intensity ◽  
Magnetorheological Fluid ◽  
Test Results ◽  
Element Analysis ◽  
Braking Torque ◽  
The Magnetic Field

In this research, a novel safety escape device based on magnetorheological fluid and permanent magnet is designed, manufactured, and tested. The safety escape device with magnetorheological fluid and permanent magnet can provide an increasing braking torque for a falling object by increasing the magnetic field intensity at the magnetorheological fluid. Such increase is realized by mechanically altering the magnetic circuit of the device when the object is falling. As a result, the falling object accelerates first and then decelerates to stop in the end. Finite element analysis is used to determine some of the specifications of the safety escape device for larger braking torque and smaller size. Finite element analysis results are also used for theoretical study and establishment of the dynamic model of the safety escape device. A prototype is realized and tested finally. The experimental test results show that the operation of the prototype conforms to the prediction by the dynamic model and validates the feasible application of magnetorheological fluids in developing falling devices.

Behavior of a Compressible Magnetorheological Fluid Damper at High Temperatures

2011 ◽  
Author(s):  
Micheal McKee ◽  
Xiaojie Wang ◽  
Faramarz Gordaninejad
Keyword(s):  
Theoretical Model ◽  
Bulk Modulus ◽  
Yield Stress ◽  
Magnetorheological Fluid ◽  
Effect Of Temperature ◽  
Temperature Dependent ◽  
Bingham Plastic ◽  
Shear Yield ◽  
Fluid Dampers ◽  
Temperature Dependent Properties

This study focuses on the effect of temperature on the performance of compressible magnetorheological fluid dampers (CMRDs). In addition to change of properties in the presence of a magnetic field, magnetorheological fluids (MRFs) are temperature-dependent materials that their compressibility and rheological properties change with temperature, as well. A theoretical model that incorporates the temperature-dependent properties of MRF is developed to predict the behavior of a CMRD. An experimental study is also conducted using an annular flow CMRD with varying temperatures, motion frequencies, and magnetic fields. The experimental results are used to verify the theoretical model. The effect of temperature on the MRF properties, such as, the bulk modulus, yield stress and viscosity, are explored. It is found that the shear yield stress of the MRF remains unchanged within the testing range while both the plastic viscosity, using the Bingham plastic model, and the bulk modulus of the MRF decrease as temperature increases. In addition, it is observed that both the stiffness and the energy dissipation decrease with an increase in temperature.

A New Rheological Model of Magnetorheological Fluids for CFD: Comparison and Validation

2018 ◽  
Author(s):  
Muaz Kemerli ◽  
Tahsin Engin ◽  
Zekeriya Parlak
Keyword(s):  
Experimental Data ◽  
Rheological Model ◽  
Numerical Models ◽  
Fluid Motion ◽  
Magnetorheological Fluid ◽  
Magnetorheological Damper ◽  
Control Approach ◽  
Sensitive Structure ◽  
Fluid Behaviour ◽  
Better Than

Magnetorheological fluid is a special smart fluid which can show different rheological properties under different magnetic flux densities due to its magnetically sensitive structure. This makes the fluid able to be manipulated and semi-actively controlled for various applications such as dampers, clutches and brakes. To provide an effective damping it is necessary to create an appropriate control algorithm. In order to design a structure with magnetorheological fluid and to get an idea for a control approach, the physics of the fluid motion has to be modelled. Computational Fluid Dynamics is an effective tool to model any fluid behaviour or any fluid involved structure. For magnetorheological devices, despite number of numerical models available in the literature, a befitting model is not yet presented. In this study a mapped rheological model is proposed and used in a magnetorheological damper simulation. The results are compared with other models and experimental data. It is shown that the new mapped model is effective and better than old approaches. It also showed a good agreement with the experimental data.

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.

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