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Research on an Electromagnetic Actuator for Vibration Suppression and Energy Regeneration

1
School of Mechanical Engineering, Shenyang University of Technology, Shenyang 110870, China
2
Department of Mechanical Engineering, Nippon Institute of Technology, Saitama 345-8501, Japan
*
Author to whom correspondence should be addressed.
Actuators 2020, 9(2), 42; https://doi.org/10.3390/act9020042
Received: 14 April 2020 / Revised: 7 May 2020 / Accepted: 20 May 2020 / Published: 22 May 2020
(This article belongs to the Section Actuators for Manufacturing Systems)
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.
Keywords: electromagnetic actuator; vibration suppression; energy regeneration; magnetic driving; output force characteristic electromagnetic actuator; vibration suppression; energy regeneration; magnetic driving; output force characteristic
MDPI and ACS Style

Wei, W.; Li, Q.; Xu, F.; Zhang, X.; Jin, J.; Jin, J.; Sun, F. Research on an Electromagnetic Actuator for Vibration Suppression and Energy Regeneration. Actuators 2020, 9, 42.

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