The Research of Capacitance Characteristics of MRF

Abstract

With the development of theory that research on Magneto-Rheological Fluids (MRF), the MRF have been used in many fields in our life. The electrical characteristics of MRF can be widely used in automatic control, medical, automotive, aircraft manufacturing and many other areas .Firstly, this article have derived the formula of MRF between capacitance and Dielectric constant, made the Capacitors which can load the MRF. And then we measure the change of capacitance which is filled with the MRF when the time of magnetic field change, And we also measure the sensitivity of the dielectric constant of different concentrations of MRF as the magnetic field changes. And at last, we have made the curve of the capacitance - magnetic induction intensity the experimental results have been analyzed. We have the conclusion that when the magnetic field increases, the dielectric constant is also increases, resulting in increased capacitance of the conclusions of MRF. Introduction

Experimental Analysis on the Dependence of the Capacitance of Magnetorheological Fluids on Frequency

“…Ruan et al (2017) analyzed the effect of magnetic field, volume fraction of carbonyl iron powder particles, and applied oscillatory shear force on the conductivity of MRFs and modeled the resistance between particles to explain the resistance changes of MRFs. Wang et al (2011) deduced the formula between magnetorheological capacitance and dielectric constant and experimentally verified the conclusion that the increase in MRF capacitances induced by the dielectric constant increases when the magnetic field increases. Bica (2009) studied the capacitance of a flat plate capacitor with magnetorheological elastomer as the dielectric as a function of magnetic field strength, and the results showed that the capacitance gradually increases and eventually remains constant when the magnetic field was applied.…”