Wideband vibration energy harvester with high permeability magnetic material

Xing, X.; Lou, Jing; Yang, Guobiao; Obi, Ogheneyunume; Driscoll, Carlie; Sun, Nian X.

doi:10.1063/1.3238319

Cited by 70 publications

(44 citation statements)

References 9 publications

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“…As a result, the most common linear mass-spring-damper systems with narrow frequency range are poorly suitable for energy harvesting from human motions because the output power of a linear harvester drops dramatically under off-resonance conditions [21]. This problem can be overcome by using frequency wideband mechanisms, such as harvester array [22], [23], mechanical stoppers [24]- [26], nonlinear springs [27], [28], frequency tunable mechanisms [29]- [32] and multi-frequency harvesters [33]- [36]. However, most of the reported wideband harvesters operate at relatively high frequencies.…”

Section: Investigation Of the Nonlinear Electromagneticmentioning

confidence: 99%

Investigation of the Nonlinear Electromagnetic Energy Harvesters From Hand Shaking

et al. 2015

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Abstract-This paper presents the design, modeling, and optimization of an electromagnetic energy harvesting (EMEH) device with various tube length and winding coil width. The nonlinear magnetic-spring configuration is employed for generating sufficient power from hand shaking of irregular and low-frequency vibrations. Based on the modeling and simulation, longer tube length of the EMEH device results in lower resonant frequency and stronger nonlinearity of the system and thus is more efficient for low-frequency harvesting. From the hand shaking test, it is found that a longer tube length and a shorter winding coil width could induce a higher power generation. The optimized device of tube length of 66 mm and winding coil width of 10 mm has achieved maximum power outputs of 568.66 µW at the hand shaking acceleration of 1 g and frequency of 6.7 Hz, which corresponds to the power density of 90.67 µW/cm 3 . Further improvement of the device has been achieved by increasing the coil length to 40 m. This device provides maximum power outputs of 825.36 µW at the hand shaking acceleration of 1.56 g and frequency of 6.7 Hz. This paper demonstrates a feasible design of nonlinear EMEH device with impressive output performance from hand shaking.Index Terms-Electromagnetic energy harvester (EMEH), nonlinear, magnetic-spring, hand shaking.

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Section: Investigation Of the Nonlinear Electromagneticmentioning

confidence: 99%

Investigation of the Nonlinear Electromagnetic Energy Harvesters From Hand Shaking

et al. 2015

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“…And by nonlinear behaviors of the magnetic forces F A and F B , the softening responses of the beams A and B appear in Fig. 10(c), which allow the frequency responses to be also broadened [11,12]. In this case, the harvester shows a 3dB bandwidth of 5.6 Hz.…”

Section: Experiments and Resultsmentioning

confidence: 98%

“…Furthermore, in this harvester, because the two ME transducers are magnetized by the magnets, there exists magnetic force between either ME transducer and the magnetic circuit. By nonlinear behavior of the magnetic force, hardening or softening response of the cantilever beams A and B will appear in frequency response of the harvester, which allows the frequency response to be broadened in either direction [11,12].…”

Section: Harvester Design and Modelingmentioning

confidence: 99%

“…The reported harvesters covered a wide band of external vibration frequency by implementing a number of serially connected cantilever beams with varying natural frequencies [9,10]. Nonlinear behavior offers new capabilities to capture energy available from more complex excitations, and several recent papers demonstrated the efficacy of this approach [11,12]. These broadening technologies in the harvesters using piezoelectric, electromagnetic and electrostatic transduction mechanisms have shown some pro-mise, but they would not be applied in the harvesters using ME transducers directly due to the different transduction mechanisms.…”

Section: Introductionmentioning

confidence: 99%

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A New Vibration Energy Harvester Using Magnetoelectric Transducer

Yang¹,

Wen²,

Li³

et al. 2011

Journal of Magnetics

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Magnetoelectric (ME) transducers were originally intended for magnetic field sensors but have recently been used in vibration energy harvesting. In this paper, a new broadband vibration energy harvester has been designed and fabricated to be efficiently applicable over a range of source frequencies, which consists of two cantilever beams, two magnetoelectric (ME) transducers and a magnetic circuit. The effects of the structure parameters, such as the non-linear magnetic forces of the ME transducers and the magnetic field distribution of the magnetic circuit, are analyzed for achieving the optimal vibration energy harvesting performances. A prototype is fabricated and tested, and the experimental results on the performances show that the harvester has bandwidths of 5.6 Hz, and a maximum power of 0.25 mW under an acceleration of 0.2 g (with g = 9.8 ms 2 ).

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“…Recent studies reported advanced energyconversion mechanisms including the frequency up-conversion [3,6,8] and hybrid mechanisms [9,10]. In addition, new magnetic materials developed by micro-/nano-technologies are actively investigated [11].…”

Section: Introductionmentioning

confidence: 99%

Topology Design Optimization of Electromagnetic Vibration Energy Harvester to Maximize Output Power

Lee

Yoon²

2013

Journal of Magnetics

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This paper presents structural topology optimization that is being applied for the design of electromagnetic vibration energy harvester. The design goal is to maximize the root-mean-square value of output voltage generated by external vibration leading structures. To calculate the output voltage, the magnetic field analysis is performed by using the finite element method, and the obtained magnetic flux linkage is interpolated by using Lagrange polynomials. To achieve the design goal, permanent magnet is designed by using topology optimization. The analytical design sensitivity is derived from the adjoint variable method, and the formulated optimization problem is solved through the method of moving asymptotes (MMA). As optimization results, the optimal location and shape of the permanent magnet are provided when the magnetization direction is fixed. In addition, the optimization results including the design of magnetization direction are provided.

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Wideband vibration energy harvester with high permeability magnetic material

Cited by 70 publications

References 9 publications

Investigation of the Nonlinear Electromagnetic Energy Harvesters From Hand Shaking

Investigation of the Nonlinear Electromagnetic Energy Harvesters From Hand Shaking

A New Vibration Energy Harvester Using Magnetoelectric Transducer

Topology Design Optimization of Electromagnetic Vibration Energy Harvester to Maximize Output Power

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