Multi-mechanism vibration harvester combining inductive and piezoelectric mechanisms

Marin, Anthony; Priya, Shashank

doi:10.1117/12.917011

Cited by 7 publications

(7 citation statements)

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“…The physical dimension and design parameters are shown in Table 1. The power generated across the coil is given as [15]:

P = {(\frac{B l \dot{z}}{R_{L} + R_{e}})}^{2} R_{L}

where the quantity ż represents the relative displacement of the center magnet with respect to coil, R L is the load resistance, B is the magnetic field, l is the length of coil, and R e is the coil resistance.…”

Section: Methodsmentioning

confidence: 99%

Harvesting Energy from the Counterbalancing (Weaving) Movement in Bicycle Riding

Yang

Yeo

Priya

2012

Sensors

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Bicycles are known to be rich source of kinetic energy, some of which is available for harvesting during speedy and balanced maneuvers by the user. A conventional dynamo attached to the rim can generate a large amount of output power at an expense of extra energy input from the user. However, when applying energy conversion technology to human powered equipments, it is important to minimize the increase in extra muscular activity and to maximize the efficiency of human movements. This study proposes a novel energy harvesting methodology that utilizes lateral oscillation of bicycle frame (weaving) caused by user weight shifting movements in order to increase the pedaling force in uphill riding or during quick speed-up. Based on the 3D motion analysis, we designed and implemented the prototype of an electro-dynamic energy harvester that can be mounted on the bicycle's handlebar to collect energy from the side-to-side movement. The harvester was found to generate substantial electric output power of 6.6 mW from normal road riding. It was able to generate power even during uphill riding which has never been shown with other approaches. Moreover, harvesting of energy from weaving motion seems to increase the economy of cycling by helping efficient usage of human power.

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“…The physical dimension and design parameters are shown in Table 1. The power generated across the coil is given as [15]:

P = {(\frac{B l \dot{z}}{R_{L} + R_{e}})}^{2} R_{L}

Section: Methodsmentioning

confidence: 99%

Harvesting Energy from the Counterbalancing (Weaving) Movement in Bicycle Riding

Yang

Yeo

Priya

2012

Sensors

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“…(12)(13)(14) can determined except for the quantity Bl which will be referred as the transformation factor for the rest of the analysis. In order to estimate the transformation factor we determined the spatial distribution of magnetic flux density and discretize the coil length using an experimentally verified approach described in literature [24,30,40]. The transformation factor which governs mechanical energy to electrical energy conversion is determined through the relationship:…”

Section: Inductive Mechanismmentioning

confidence: 99%

“…Multi-mechanism vibration energy harvesting consists of harvesting vibration through two different mechanisms simultaneously. Multi-mechanism harvesters have been developed for both cantilever based designs [32] and magnetic levitation based harvesters [30]. Each of these designs combined the inductive mechanism with the piezoelectric mechanism.…”

Section: Introductionmentioning

confidence: 99%

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Multi-Mechanism Non-Linear Vibration Harvester Combining Inductive and Magnetostrictive Mechanisms

Marin

Tadesse

Priya

2013

Integrated Ferroelectrics

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In this study, we focus on developing a multi-mechanism energy harvester (MMEH) which combines magnetostrictive and inductive mechanisms with overall shape and size similar to AA battery. The multi-mechanism harvester was theoretically modeled, fabricated and experimentally characterized. The theoretical model combining analytical and FEM modeling techniques provides the system dynamics and output power for specific generator and magnetostrictive geometry at various source conditions. The prototype consisted of a cylindrical tube containing a magnetic levitation cavity where a center magnet oscillated through a copper coil. Magnetostrictive rods were mounted on the bottom and top cap of the cylindrical tube. In response to external vibrations, electrical energy was harvested from the relative motion between magnet and coil through Faraday's effect and from the magnetostrictive material through the Villari effect. The experimental results were compared to theoretical predictions for both mechanisms which showed reasonable agreement. The difference between model predictions and experiments are discussed in detail. The inductive mechanism generated 5. 3 mW, 2.57 mW, 0.27 mW at 0.9 G, 0.7 G and 0.4 G respectively.

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“…Although the hazardous lead content remains a significant drawback, PZT is also an attractive material for micro‐scale energy harvesting applications 2–4 . Piezoelectric vibration EH based on polymers (PVDF, polyamides or parylene C) and lead‐free materials (AlN, ZnO) are also investigated in the literature but the first ones present serious lifetime and aging issues and the second ones suffer from moderate piezoelectric coupling factors 5–10 . Many designs of piezoelectric vibration EH use a cantilever as the mechanical converter.…”

Section: Introductionmentioning

confidence: 99%

Key features in the development of unimorph stainless steel cantilever with screen‐printed PZT dedicated to energy harvesting applications

Taborda

Elissalde

Chung

et al. 2020

Int J Applied Ceramic Tech

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The design and processing of vibrational energy harvester based on screen-printed piezoelectric lead zirconate titanate (Pb(ZrxTi1-x)O3 (PZT)) are described here. Two different structures, a simple cantilever and a complex zigzag geometry made of PZT layer sandwiched between gold electrodes and supported on a metallic stainless steel substrate have been successfully fabricated by screen printing thick film technique. Compared to bulk PZT ceramics, the main limiting features at different scales are porosity, interfaces, and bending issues. The microstructural analysis of the interfaces in the cantilever has highlighted the formation of an interface between the substrate and the bottom electrode which ensures cohesion of the structure but can limit its dynamic. Bending has shown to be dependent on the thickness of the active piezoelectric layer. Dielectric and electromechanical characterizations performed on multilayers, bulk ceramics, and free-standing screen-printed disks are compared and discussed on the basis of interface issues.

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Multi-mechanism vibration harvester combining inductive and piezoelectric mechanisms

Cited by 7 publications

References 0 publications

Harvesting Energy from the Counterbalancing (Weaving) Movement in Bicycle Riding

Harvesting Energy from the Counterbalancing (Weaving) Movement in Bicycle Riding

Multi-Mechanism Non-Linear Vibration Harvester Combining Inductive and Magnetostrictive Mechanisms

Key features in the development of unimorph stainless steel cantilever with screen‐printed PZT dedicated to energy harvesting applications

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