Research on Mechanical Properties of a New Type of Electromagnetic Eddy Current Damper
PENG Jinqiang
LIU Yanhui
CHEN Kejian
DAI Shengyong
ZHANG Zhiyong
ZHANG Ying
Abstract：In order to improve the applicability of eddy current dampers in practical engineering,a new type of actively controlled electromagnetic eddy current damper(EECD)was proposed by using an external power supply to change the magnetic flux inside the device.Firstly,considering the advantages of the magnetic circuit effectively using the magnetic flux and the rotation device to amplify the conductor plate to cut the magnetic induction line,the structural design of the damper is carried out,and its working principle is introduced in detail.Then,the electromagnetic simulation software(COMSOL Multiphysics)was used to analyze the magnitude of the magnetic flux generated by the magnetic induction under different currents,and the corresponding theoretical formula of magnetic induction intensity was deduced.The working conditions under different currents with the same number of turns were analyzed,and the magnetic induction intensities in the simulation,theory,and experiment were compared based on the measured data to verify the accuracy of the theory.Finally,the equivalent damping coefficient of the damper under a stable current was derived,and then the eddy current damping force was obtained.The results show that the EECD can achieve the design purpose within the research speed range,the theoretical results of the equivalent damping coefficient,inertial mass,and eddy current damping force are basically consistent with the experimental results,and the damping performance of EECD is nearly linear;within the research speed range,with the change of current,the magnetic flux and damping force generated by the electromagnet also change proportionally;the hysteresis performance of the device is relatively smooth,and the repeatability is good,which indicates that the mechanical properties of the new electromagnetic damper are stable and thus the device is feasible.
Keywords：Active controlElectromagnetEddy current damperDampingInertial mass
Publication Date：2024-06-30
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：9( 144-152 )