Electromagnetic ferrofluid-based energy harvester

Bibo, Amin; Masana, Ravindra; King, Allen L.; Li, G.; Daqaq, Mohammed F.

doi:10.1016/j.physleta.2012.05.033

“…In the past, studies by Bibo et al are including an induced voltage according to magnetic field intensity and frequencies of external vibration. However, research of this kind is not considered a back yoke which makes closed magnetic flux path [6]. Configuration of closed magnetic circuit increases the amount of magnetic flux linkage passing ferrofluid by changing the operating point of the permanent magnet.…”

Section: Introductionmentioning

confidence: 99%

Analysis of Electromotive Force Characteristics for Electromagnetic Energy Harvester using Ferrofluid

Kim¹

2015

Journal of Magnetics

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This paper investigates the concept and implementation of an energy harvesting device using a ferrofluid sloshing movement to generate an electromotive force (EMF). Ferrofluids are often applied to energy harvesting devices because they have both magnetic properties and fluidity, and they behave similarly to a soft ferromagnetic substance. In addition, a ferrofluid can change its shape freely and generate an EMF from small vibrations. The existing energy harvesting techniques, for example those using piezoelectric and thermoelectric devices, generate minimal electric power, as low as a few micro-watts. Through flow analysis of ferrofluids and examination of the magnetic circuit characteristics of the resultant electromagnetic system, an energy harvester model based on an electromagnetic field generated by a ferrofluid is developed and proposed. The feasibility of the proposed scheme is demonstrated and its EMF characteristics are discussed based on experimental data.

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“…Various harvester configurations have been studied, with the basic concept remaining the same. The core principle is that external vibrations are used to set a permanent magnet in motion relative to a stationary induced voltage coil [6]. As per Faraday's law, the change of magnetic flux produces a current in the induced voltage coil which can then drive an electrical device.…”

Section: Introductionmentioning

confidence: 99%

“…Ferrofluids are colloidal liquids made of nanoscale permanent magnetic dipoles [6] and a ferrofluid can change shape freely and generates an electromotive force (EMF) from small vibrations. Ferrofluids are often applied to energy harvesting devices, because they have fluidity and magnetic properties and behave like soft ferromagnetic substance [7][8][9].…”

Section: Introductionmentioning

confidence: 99%

Analysis of electromotive force characteristics and device implementation for ferrofluid based energy harvesting system

Oh

¹

,

Sohn

²

,

Byun

³

et al. 2014

2014 17th International Conference on Electrical Machines and Systems (ICEMS)

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This paper investigates the concept and implementation of an energy harvesting device using a ferrofluid sloshing movement to generate an electromotive force (EMF). Ferrofluids are often applied to energy harvesting devices because they have both magnetic properties and fluidity, and they behave similarly to a soft ferromagnetic substance. In addition, a ferrofluid can change its shape freely and generate an EMF from small vibrations. The existing energy harvesting techniques, for example those using piezoelectric and thermoelectric devices, generate minimal electric power, as low as a few micro-watts. Through flow analysis of ferrofluids and examination of the magnetic circuit characteristics of the resultant electromagnetic system, an energy harvester model based on an electromagnetic field generated by a ferrofluid is developed and proposed. The feasibility of the proposed scheme is demonstrated and its EMF characteristics are discussed based on experimental data.

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“…The energy harvesting TMFD mounted on a vibrating structure is constituted of a rectangular container which carries a magnetized ferrofluid. However, the concept of vibration energy harvester based on ferrofluid was proposed by Bibo et al [67] in 2012, as shown in Fig. 21.…”

Section: Vibration Energy Harvesters Based On Ferrofluidmentioning

confidence: 99%

Damping Applications of Ferrofluids: A Review

Huang¹,

Yao²,

Zhang³

et al. 2017

Journal of Magnetics

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Ferrofluids are a special category of smart nanomaterials which shows normal liquid behavior coupled with superparamagnetic properties. One of the earliest and most prospective applications of ferrofluids is in damping, which has prominent advantages compared with conventional damping devices: simplicity, flexibility and reliability. This paper presents the basic principles that play a major role in the design of ferrofluid damping devices. The characteristics of typical ferrofluid damping devices including dampers, vibration isolators, and dynamic vibration absorbers are compared and summarized, and then recent progress of vibration energy harvesters based on ferrofluid is briefly described. Additionally, we proposed a novel ferrofluid dynamic vibration absorber in this paper, and its damping efficiency was verified with experiments. In the end, the critical problems and research directions of the ferrofluid damping technology in the future are raised.

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Electromagnetic ferrofluid-based energy harvester

Cited by 66 publications

References 12 publications

Analysis of Electromotive Force Characteristics for Electromagnetic Energy Harvester using Ferrofluid

Analysis of Electromotive Force Characteristics for Electromagnetic Energy Harvester using Ferrofluid

Analysis of electromotive force characteristics and device implementation for ferrofluid based energy harvesting system

Damping Applications of Ferrofluids: A Review

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