Numerical analysis of a magnetic-spring-based piecewise nonlinear electromagnetic energy harvester

Wang, Wei; Wei, Hongtao; Wei, Zhiyan

doi:10.1140/epjp/s13360-021-02255-5

Cited by 11 publications

(11 citation statements)

References 18 publications

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“…For instance, based on the potential well escape phenomenon [38], Wang et al [39] introduced bistability into EMEH by the magnets arrangement, achieving ultra-wide bandwidth from 5.8 Hz to 22 Hz under the 0.5 g excitation, and Liu et al [40] combined the EMEH with four mechanical springs to achieve a tri-stable mechanism that provided broad bandwidth from 2 Hz to 11.5 Hz under 0.7 g excitation. However, the complexity introduced by mechanical and magnetic interactions [41,42] of nonlinear EMEHs hampers their practical application, especially in small-scale energy harvesting.…”

Section: Introductionmentioning

confidence: 99%

Kresling origami-inspired electromagnetic energy harvester with reversible nonlinearity

Yin,

Han,

Tang

et al. 2024

Smart Mater. Struct.

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This paper presents an electromagnetic energy harvester based on a unique nonlinear Kresling origami-inspired structure. By introducing the equilibrium shift phenomenon, reversible nonlinearity (i.e. mixed softening-hardening behavior) empowers the proposed harvester to work in a broad frequency band, confirmed by both simulation using a dynamic model and experimentation. The prototyped device can produce the open-circuit RMS voltage from 0.09 V to 0.20 V in the reversibly nonlinear response region in [6.19 Hz, 9.63 Hz] and a maximum output power of 0.4956 mW at a optimum load of 18.1 Ω under the excitation of 1.1 g. Moreover, detailed research further reveals that the design parameters of Kresling origami-inspired structure and electrical and mechanical loads influence reversible nonlinearity. Increasing the tip mass and γ0 in the M2 region of the design map strengthens the softening behavior, and enlarging the electrical load enhances the hardening behavior. The findings from this work deepen the understanding of the nonlinear behavior of Kresling origami, unveils the great potential of origami structure in energy harvesting and offers a new method to realize broadband vibration energy harvesters.

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Section: Introductionmentioning

confidence: 99%

Kresling origami-inspired electromagnetic energy harvester with reversible nonlinearity

Yin,

Han,

Tang

et al. 2024

Smart Mater. Struct.

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“…It has been evidently established in the literature [11][12][13][14][15] that nonlinear stiffness behaviour, as depicted in Figure 1, can be implemented using several geometric arrangements of permanent magnets, whose lines of flux cut across defined arrangements of copper coils. In [11], a nonlinear dual-function multi-modal energy harvester and vibration absorber (EHVA) for harvesting energy and suppressing vibration in the low-medium frequency band, was presented.…”

Section: Introductionmentioning

confidence: 99%

“…In this study, a special emphasis was given to the magnetic force acting on the moving magnet, based on two parameters-the volume of the magnets and the geometry of the two fixed magnets (i.e., disc or ring). Meanwhile, the authors in [15] numerically analysed a magnetic-spring-based electromagnetic energy harvester with piecewise nonlinear stiffness. It was demonstrated that the piecewise nonlinear stiffness behaviour, developed due to the interactions of the moving magnet's flux on the coil, facilitated the response of the system in a wider frequency range, enabling it to generate more electrical energy.…”

Section: Introductionmentioning

confidence: 99%

Investigative Study of the Effect of Damping and Stiffness Nonlinearities on an Electromagnetic Energy Harvester at Low-Frequency Excitations

Diala,

Zhu,

Gunawardena

2024

Machines

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Ambient vibration energy is widely being harnessed as a source of electrical energy to drive low-power devices. The vibration energy harvester (VEH) of interest employs an electromagnetic transduction mechanism, whereby ambient mechanical vibration is converted to electrical energy. The limitations affecting the performance of VEHs, with an electromagnetic transduction structure, include its operational bandwidth as well as the enclosure-size constraint. In this study, an analysis and design of a nonlinear VEH system is conducted using the Output Frequency Response Function (OFRF) representations of the actual system model. However, the OFRF representations are determined from the Generalised Associated Linear Equation (GALE) decompositions of the system of interest. The effect of both nonlinear damping and stiffness characteristics, to, respectively, extend the average power and operational bandwidth of the VEH device, is demonstrated.

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“…This is considered as the equilibrium point of their microscale vibration EMGs that feature a resonant mass/spring system [16]. Wang et al [31] concluded from numerical analysis that, when the central plane of the coil is at the midpoint of the linear EMG frame, their piecewise device offers the highest voltage output. Based on simulation results, Haroun et al [23,32] discussed the relationship between magnetic flux gradient and magnet relative position within a coil.…”

Section: Introductionmentioning

confidence: 99%

A Multidirectional Forearm Electromagnetic Generator Designed via Numerical Simulations

King

Xie

et al. 2023

Actuators

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Harvesting biomechanical energy from daily human body motions provides a promising and sustainable power solution for wearable electronics, whose current power supplies, i.e., batteries, have unsatisfactory capacity and durability due to volume, shape, and flexibility constraints. Electromagnetic generators (EMGs) are favorable energy transducers because of their high energy-conversion efficiency, low dependence on frequencies, and long-term stability. However, an EMG that can effectively harvest energy from multi-directional arm motions at aperiodic low frequencies are yet to be created. Here, we introduce a unique EMG configuration by combining a linear and a helix frame into a monolithic unit (EMG-LH), enabling the EMG to scavenge energy from all kinds of arm motions up to 6 degrees of freedom (DOFs) (movement along XYZ axes and forearm rotations). The EMG frame geometry is designed and optimized according to numerical simulations. To clarify the working mechanism and maximize the power output, the copper coils’ winding pattern, the magnets’ velocity profiles, and the resulting voltage output are numerically simulated and then experimentally verified. Our EMG-LH outperforms linear EMGs (EMG-Ls) and helix EMGs (EMG-Hs) in harvesting energy from all arm motions. This work explicitly presents a forearm-wearable energy harvester as a sustainable power source for wearable electronics.

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Numerical analysis of a magnetic-spring-based piecewise nonlinear electromagnetic energy harvester

Cited by 11 publications

References 18 publications

Kresling origami-inspired electromagnetic energy harvester with reversible nonlinearity

Kresling origami-inspired electromagnetic energy harvester with reversible nonlinearity

Investigative Study of the Effect of Damping and Stiffness Nonlinearities on an Electromagnetic Energy Harvester at Low-Frequency Excitations

A Multidirectional Forearm Electromagnetic Generator Designed via Numerical Simulations

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