Mathematical modelling of cylindrical electromagnetic vibration energy harvesters

Morgado, Manuel; Morgado, L. F.; Silva, Nuno; Morais, Raul

doi:10.1080/00207160.2014.884715

Cited by 15 publications

(12 citation statements)

References 21 publications

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“…2h). For harvesters embedding a single levitating magnet inside the container and attaching multiple coils (third category), six studies [66,78,79,82,89,80] propose cylindrical containers that include cylindrical (Fig. 3a-c,e) and ring magnets arranged along a shaft (Fig.…”

Section: Magnetic Levitation Architecturesmentioning

confidence: 99%

“…Hence, it is noteworthy to state that no harvesters were already designed for large-scale electric powering. In a signicant number of studies (6 out of 29) [25,72,76,79,81,89], the authors selected PTFE polytetrauorethylene (TEFLON ® ) to manufacture the container, as this material features low friction coecients.…”

Section: Construction Parameters Of Magnetic Levitation Harvestersmentioning

confidence: 99%

“…Six hybrid patterns were established, all of these including some type of analytical modelling, three comprising semi-analytical modelling, three with FEM modelling, and, surprisingly, three studies used empirical models (Table 3). The most common encloses three modelling approaches: the analytical-empirical-FEM pattern, counting with eight models [6,7,57,64,76,77,81,83], was the most considered one; however, the analytical-semi-analytical-empirical [69,70,72,89] and analytical-semi-analytical-FEM [13,73,75,82] hybridizations were also frequently used. Besides, three hybrid patterns were proposed using two modelling approaches: analytical-empirical [61,66,79,87,88], analytical-FEM [74,85,86] and analytical-semi-analytical [25,84].…”

Section: Overall Analysis Of Modelling Approachesmentioning

confidence: 99%

“…It was modelled by analytical, semi-analytical and FEM approaches. Three dierent methods have been proposed to model this phenomenon (Table 5): (i) B is constant along the tri-dimensional space enclosed by the harvester, not computed using the magnet characteristics (equation Q1) [66,79] or computed by analytic approximations (equation Q2) [71,87]; (ii) B as a single variable function dened on a set of axial distances to the centre of the levitating hard-magnet (equations Q3 and Q5) [69,72,81]; and (iii) B described as a two-variable function of radial and axial distances to the centre of the levitating magnet (equations Q6 to Q9) [25,70,74,89].…”

Section: Modelling the Magnetic Eld Of Permanent Magnetsmentioning

confidence: 99%

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Electromagnetic energy harvesting using magnetic levitation architectures: A review

et al. 2020

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Motion-driven electromagnetic energy harvesters have the ability to provide low-cost and customizable electric powering. They are a well-suited technological solution to autonomously supply a broad range of high-sophisticated devices. This paper presents a detailed review focused on major breakthroughs in the scope of electromagnetic energy harvesting using magnetic levitation architectures. A rigorous analysis of twenty-one design congurations was made to compare their geometric and constructive parameters, optimization methodologies and energy harvesting performances. This review also explores the most relevant models (analytical, semi-analytical, empirical and nite element method) already developed to make intelligible the physical phenomena of their transduction mechanisms. The most relevant approaches to model each physical phenomenon of these transduction mechanisms are highlighted in this paper. Very good agreements were found between experimental and simulation tests with deviations lower than 15%. Moreover, the external motion excitations and electric energy harvesting outputs were also comprehensively compared and critically discussed. Electric power densities up to 8 mW/cm 3 (8 kW/m 3 ) have already been achieved; for resistive loads, the maximum voltage and current were 43.4 V and 150 mA, respectively, for volumes up to 235 cm 3 . Results highlight the potential of these harvesters to convert mechanical energy into electric energy both for large-scale and small-scale applications. Moreover, this paper proposes future research directions towards eciency maximization and minimization of energy production costs.

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Section: Magnetic Levitation Architecturesmentioning

confidence: 99%

Section: Construction Parameters Of Magnetic Levitation Harvestersmentioning

confidence: 99%

Section: Overall Analysis Of Modelling Approachesmentioning

confidence: 99%

Section: Modelling the Magnetic Eld Of Permanent Magnetsmentioning

confidence: 99%

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Electromagnetic energy harvesting using magnetic levitation architectures: A review

et al. 2020

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“…In recent years, many researchers have tried to scavenge vibration energy for micro-power generation, which can be applied to low-power electrical devices such as wireless sensors and detectors [1][2][3][4] . The conversion principles for the vibration energy harvesting mainly include the electrostatic principle [5][6][7] , the piezoelectric principle [8][9][10][11][12][13][14][15] , the electromagnetic principle [16][17][18] , and the ferroelectric material [19][20][21][22] . The piezoelectric vibration energy harvesting technique has received much attention because of its advantages of high energy density, fast response speed, and simple structure.…”

Section: Introductionmentioning

confidence: 99%

Design and dynamic analysis of integrated architecture for vibration energy harvesting including piezoelectric frame and mechanical amplifier

Duan¹,

Cao

et al. 2021

Appl. Math. Mech.-Engl. Ed.

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Vibration energy harvesters (VEHs) can transform ambient vibration energy to electricity and have been widely investigated as promising self-powered devices for wireless sensor networks, wearable sensors, and applications of a micro-electro-mechanical system (MEMS). However, the ambient vibration is always too weak to hinder the high energy conversion efficiency. In this paper, the integrated frame composed of piezoelectric beams and mechanical amplifiers is proposed to improve the energy conversion efficiency of a VEH. First, the initial structures of a piezoelectric frame (PF) and an amplification frame (AF) are designed. The dynamic model is then established to analyze the influence of key structural parameters on the mechanical amplification factor. Finite element simulation is conducted to study the energy harvesting performance, where the stiffness characteristics and power output in the cases of series and parallel load resistance are discussed in detail. Furthermore, piezoelectric beams with variable cross-sections are introduced to optimize and improve the energy harvesting efficiency. Advantages of the PF with the AF are illustrated by comparison with conventional piezoelectric cantilever beams. The results show that the proposed integrated VEH has a good mechanical amplification capability and is more suitable for low-frequency vibration conditions.

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Numerical Simulation of Inertial Energy Harvesters using Magnets

Goncalves

Morgado

et al. 2018

Innovation, Engineering and Entrepreneurship

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Mathematical modelling of cylindrical electromagnetic vibration energy harvesters

Cited by 15 publications

References 21 publications

Electromagnetic energy harvesting using magnetic levitation architectures: A review

Electromagnetic energy harvesting using magnetic levitation architectures: A review

Design and dynamic analysis of integrated architecture for vibration energy harvesting including piezoelectric frame and mechanical amplifier

Numerical Simulation of Inertial Energy Harvesters using Magnets

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