Exploiting dynamic interaction of magnets to enhance off-resonance energy harvesting performance

Feng Qian; Shengxi Zhou; Lei Zuo

doi:10.1117/12.2296430

15 March 2018 Exploiting dynamic interaction of magnets to enhance off-resonance energy harvesting performance

Feng Qian, Shengxi Zhou, Lei Zuo

Proceedings Volume 10595, Active and Passive Smart Structures and Integrated Systems XII; 105950I (2018) https://doi.org/10.1117/12.2296430
Event: SPIE Smart Structures and Materials + Nondestructive Evaluation and Health Monitoring, 2018, Denver, Colorado, United States

Abstract

This paper aims to improve the off-resonance energy harvesting performance of a vibration-based energy harvesting system by exploiting the dynamic interaction between two attractive magnets. A static force-displacement model is firstly derived by a simple experiment to describe the magnetic force and then extended to the dynamic model to characterize the transient interaction of the magnets. A theoretical model is developed and experimentally verified to be capable of accurately predicting the voltage and power outputs of the proposed off-resonance energy harvesting system with different resistive loads. The performance of the proposed energy harvesting system under off-resonance excitations is examined and evaluated by comparing with the one of the system without magnetic interaction. Results reveal that the nonlinear dynamic force induced by the relative motion between the two magnets could significantly enhance the off-resonance power output. The influence of the distance between the two magnets, as well as the external resistive load, on the voltage and off-resonance power outputs of the system is studied. The proposed magnetic field enhanced energy harvesting system has 1760 times more power output than the counterpart system without magnetic interaction at the off-resonance harmonic excitation of 3 Hz and 0.5 m/s² and an optimal resistance of 20 kΩ.

Conference Presentation

Citation Download Citation

Feng Qian, Shengxi Zhou, and Lei Zuo "Exploiting dynamic interaction of magnets to enhance off-resonance energy harvesting performance", Proc. SPIE 10595, Active and Passive Smart Structures and Integrated Systems XII, 105950I (15 March 2018); https://doi.org/10.1117/12.2296430

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available