Broadband magnetic levitation-based nonlinear energy harvester

Nammari, Abdullah; Doughty, Seth; Savage, Dustin; Weiss, Leland; Jaganathan, Arun P.; Bardaweel, Hamzeh

doi:10.1117/12.2231194

Cited by 4 publications

(4 citation statements)

References 23 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Upon free-vibration of the energy harvester, the induced voltage and ring-out signal was measured and used to estimate total damping, c t . Details of the ring-out experiment and voltage measurements of the energy harvester are described in previous literature (Nammari et al, 2016). The total damping coefficient, c t , was then estimated using the logarithmic decrement method outlined above, and the electromagnetic damping was calculated using equation (5).…”

Section: Resultsmentioning

confidence: 99%

See 1 more Smart Citation

Design enhancement and non-dimensional analysis of magnetically-levitated nonlinear vibration energy harvesters

Nammari

Bardaweel

2017

Journal of Intelligent Material Systems and Structures

Self Cite

View full text Add to dashboard Cite

Over the past decade, there has been special interest in developing nonlinear energy harvesters capable of operating over a wideband frequency spectrum. Chief among the nonlinear energy harvesting techniques is magnetic levitation–based energy harvesting. Nonetheless, current nonlinear magnetic levitation–based energy harvesting approaches encapsulate design challenges. This work investigates some of the design issues and limitations faced by traditional magnetic levitation–based energy harvesters such as damping schemes and stiffness nonlinearities. Both experiment and model are used to quantify and evaluate damping regimes and stiffness nonlinearities present in magnetic levitation–based energy harvesters. Results show that dry friction, mostly ignored in magnetic levitation–based energy harvesting literature, contributes to the overall energy dissipation. Measured and modeled magnetic forces–displacement curves suggest that stiffness nonlinearities are weak over moderate distances. An enhanced design utilizing a combination of mechanical and magnetic springs is introduced to overcome some of these limitations. A non-dimensional model of the proposed design is developed and used to investigate the enhanced architecture. The unique potential energy profile suggests that the proposed nonlinear energy harvester outperforms the linear version by steepening the displacement response and shifting the resonance frequency, resulting in a larger bandwidth for which power can be harvested.

show abstract

Section: Resultsmentioning

confidence: 99%

“…When the energy harvester is subject to external base-excitation, y ·· , the levitated magnetic mass, m , moves upward with relative acceleration, z ·· = x ·· − y ·· . The dynamic behavior of the proposed harvester can then be rewritten as (Nammari et al, 2016)…”

Section: Non-dimensional Analysismentioning

confidence: 99%

Design enhancement and non-dimensional analysis of magnetically-levitated nonlinear vibration energy harvesters

Nammari

Bardaweel

2017

Journal of Intelligent Material Systems and Structures

Self Cite

View full text Add to dashboard Cite

show abstract

“…Robot movements are not consistent and it is difficult to harvest a reliable amount of energy from every forms of robot motions. To overcome these limitation, recent studies explores nonlinear techniques to obtain broadband energy harvesters [34,35]. Mann et al [34] utilizes magnetic levitation-based energy harvesting which works similar to spring characteristics by two outer magnets that they are mechanically attached to a threaded support and a suspending center magnet.…”

Section: Electromagnetic Energy Harvestermentioning

confidence: 99%

Adaptive Electromagnetic Energy Harvester for Mobile Devices

Kamal¹,

Moghadam²

2020

Preprint

View full text Add to dashboard Cite

<div>Advances in design and development of light-weight and low power wearable and mobile devices open up the possibility of lifetime extension of these devices from ambient sources through energy harvesting devices as opposed to periodically recharge the batteries. The most commonly available ambient energy source for mobile devices is Kinetic energy harvesters (KEH). The major drawback of the energy harvesters is limited effectiveness of harvesting mechanism near a fixed resonant frequency. It is difficult to harvest a reliable amount of energy from every forms of device motions with different excitation frequencies. To overcome this drawback, in this paper we propose an adaptive electromagnetic energy harvester which utilises spring characteristics to adapt its resonant frequency to match the ambient excitation frequency. This paper presents a prototype design and analysis of an adaptive electromagnetic energy harvester both in simulation and real. The harvester has tested using a specially designed experimental setup and compared with numerical simulations. The proposed solution generates 3.5 times higher maximum power over the default power output and 2.4 times higher maximum frequency compared to a fixed resonant frequency electromagnetic energy harvester.</div>

show abstract

“…The applications of electromagnetic energy harvesting from structural deformations and vibrations have been intensively developed in the last decade [ 10 , 11 ]. Recent research in energy harvesting by electromagnetic induction has focused primarily on harvesting energy from the mechanical vibration of structures, to which the harvester is attached using the broadband effects [ 12 , 13 , 14 ]. Some of these researches demonstrated a significant enhancement of the harvested power and the frequency bandwidth of a multimodal vibration energy harvester consisting of arrays of coupled levitated magnets [ 15 , 16 ] when the device is excited beyond its critical Duffing amplitude [ 17 , 18 ]; this is due to magnetic nonlinearity and modal interactions [ 19 ].…”

Section: Introductionmentioning

confidence: 99%

Karman Vortex Creation Using Cylinder for Flutter Energy Harvester Device

et al. 2017

View full text Add to dashboard Cite

This study presents the creation of a Karman vortex for a fluttering electromagnetic energy harvester device using a cylinder. The effects of two parameters, which are the diameter and the position of the cylinder, were investigated on the Karman vortex profile and the amplitude of the fluttering belt, respectively. A simulation was conducted to determine the effect of the creation of the Karman vortex, and an experiment was performed to identify influence of the position of the cylinder on the fluttering belt amplitude. The results demonstrated that vortex-induced vibration occurred at the frequency of the first natural mode for the belt at 3 cm and 10 cm for the diameter and position of the cylinder, respectively. Under such configuration, an electromagnetic energy harvester was attached and vibrated via the fluttering belt inside the turbulent boundary layers. This vibration provides a measured output voltage and can be used in wireless sensors.

show abstract

Broadband magnetic levitation-based nonlinear energy harvester

Cited by 4 publications

References 23 publications

Design enhancement and non-dimensional analysis of magnetically-levitated nonlinear vibration energy harvesters

Design enhancement and non-dimensional analysis of magnetically-levitated nonlinear vibration energy harvesters

Adaptive Electromagnetic Energy Harvester for Mobile Devices

Karman Vortex Creation Using Cylinder for Flutter Energy Harvester Device

Contact Info

Product

Resources

About