Theoretical model and experimental study on working characteristics of electromagnetic damper

电磁阻尼器工作特性的理论模型与试验研究

¹ Electric Power Research Institute, Guangdong Power Grid Co., Ltd, Guangzhou 510080, China
² School of Mechanical Engineering, Yangzhou University, Yangzhou 225127, China
³ School of Marine Science and Technology, Northwestern Polytechnical University, Xi'an 710072, China

Received: 18 July 2022

Abstract

An analysis model for electromagnetic damper is proposed in order to obtain the working characteristics of electromagnetic damper under different working conditions. Firstly, the inertia force and the electromagnetic force of electromagnetic damper are calculated, and the friction force is tested. Secondly, by combining the theoretical results and the test data, the working characteristic analysis model for electromagnetic damper is established. Finally, the damping characteristics and energy harvesting characteristics of the electromagnetic damper under multiple working conditions are discussed by using the present model. The working condition characteristic surface of the electromagnetic damper is obtained by using the recovered energy and equivalent damping coefficient as the coordinate plane. The results show that the error between the calculated results and the test results is below 10%. The damping force and output voltage of the electromagnetic damper are positively correlated with excitation frequency and amplitude. The excitation amplitude and frequency influence the energy harvesting characteristic and damping property deeply, respectively. The increase in load resistance reduces the energy regenerative capacity and damping capacity of the electromagnetic damper.

摘要

为了明确电磁阻尼器在不同工况下的工作特性, 提出了一种针对电磁阻尼器工作特性的分析模型。计算电磁阻尼器的惯性力和电磁阻尼力, 测试电磁阻尼器的内部摩擦力; 结合计算结果和测试数据, 建立电磁阻尼器工作特性分析模型; 运用该模型讨论多工况下电磁阻尼器的阻尼力输出特性与馈能特性, 得到以回收能量和等效阻尼系数为坐标平面的电磁阻尼器工况特性曲面。结果表明: 该模型计算结果与试验测试结果的误差小于10%;电磁阻尼器的阻尼力和输出电压均与激励频率和幅值呈正相关; 激励幅值对馈能特性的影响较大, 激励频率对阻尼特性的影响较大; 负载电阻的减少将提升电磁阻尼器的馈能能力与减振能力。