Research on an Electromagnetic Actuator for Vibration Suppression and Energy Regeneration

Wei Wei,Junjie Jin,Jiaqi Jin,Xiaoyou Zhang,Fangchao Xu,Qiang Li,Feng Sun

doi:10.3390/act9020042

Wei Wei, Junjie Jin + Show 5 more

Open Access

https://doi.org/10.3390/act9020042

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Abstract

This paper proposes an electromagnetic actuator that concurrently realizes two working functions of vibration suppression and energy regeneration. The actuator consists of four permanent magnetic rings, three soft iron rings, three coils, and three springs. The design of the electromagnetic actuator is based on finite element method (FEM) analysis, and the prototype is based on this analysis. Based on the prototype, the characteristics of the electromagnetic actuator, which has an output force–current coefficient of 39.49 N/A, are explored. A control algorithm with a position controller and an acceleration controller are applied to the actuator. When an impulse excitation is input to the electromagnetic actuator, the acceleration of the controlled object decreases from 114.26 m/s2 to 3.14 m/s2 here. Moreover, when the sinusoidal excitation with a 3 mm amplitude and 5 Hz frequency is input to the electromagnetic actuator, the vibration amplitude of the controlled object is 0.045 mm, suppressed within 1.46% when compared with the input signal. The peak value of the regenerated electromotive force is 1.97 V here, and the actuator efficiency for regenerating energy is 11.59%. The experimental results with multiple frequencies and amplitudes also show that the amplitude of the controlled object can be suppressed within 5.5%, and that the ratio of the electromotive force (EMF) to the input amplitude is 0.13. The results indicate that this electromagnetic actuator can suppress vibrations effectively and regenerate energy from vibrations.

Highlights

Vibration is a common phenomenon of a mechanical system [1] that possesses properties which partly affect the stability and safety of equipment and machine operation
Coil1 and coil3 are connected in series, and the voltage signal is transmitted to the A/D converter of the DSP for regenerating the electromotive force (EMF)
This paper proposed a new type of electromagnetic actuatoractuator that may that be applied

Summary

Introduction

Vibration is a common phenomenon of a mechanical system [1] that possesses properties which partly affect the stability and safety of equipment and machine operation. Examples of these mechanical systems include vehicles [2,3], motors [4], elevators, robots [5], construction machinery [6], wind power systems [7], flywheel systems, rail transportation, and many other mechanisms in other fields [8]. For mitigating vibrations of mechanisms, Xu et al [9] proposed a new vibration isolation and mitigation device which is used to restrain platform vibration under a wide frequency excitation. Wu et al [11]

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