Magnetic circuit analysis of MR damper

• Main Authors: Yi-Hong Su, 蘇益弘
• Other Authors: Lee-Long Han
• Format: Others
• Language: zh-TW
• Published: 2008
• Online Access: http://ndltd.ncl.edu.tw/handle/79sm5g

碩士 === 國立臺北科技大學 === 製造科技研究所 === 96 === Magneto-rheological (MR) fluid is a high saturation magnetic flux density and low coercive force suspension, which contains soft magnetic particles dispersed in the non-magnetic oil. When an external magnetic field is applied, the MR fluid changes from good flow of Newtonian fluid into Bingham plastic in few millisecond and this change is continuous, rapid, reversible, and easy to control. Therefore MR fluid damper is an ideal semi-active control device, because when the damping force in adjusting process could fault its performance, MR fluid damper still able to use passive mode. This paper aims to study MR fluid damper gap, magnetic field intensity, magnetic flux density, and eccentricity that may affect the magnetic field characteristics. To obtain a good magneto-rheological damper, these parameters will be analyzed with Magneto V64 software and found the largest magnetic field under the same current and best gap. From the ideal gap, we will compare its efficiency of eccentric and inclined axis after impact. Finally, in accordance with these data to estimate whether it is necessary to consider eccentric left and right sides of different space, so to the left and right sides of the magnetic field intensity, and impact of magnetic damper effect.