Analysis of Electromotive Force Characteristics for Electromagnetic Energy Harvester using Ferrofluid

Kim, Young Sun

doi:10.4283/jmag.2015.20.3.252

Cited by 16 publications

(3 citation statements)

References 8 publications

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“…Subsequently, an electric current was induced within the inductive coil wrapped around the container generating approximately 1 mW of power. Similar experiments were carried out by Purohit et al [11], Oh et al [12], and Kim [13], generating 9 mV open circuit voltage at 5 Hz vibration frequency. Oh's work also concluded that using an iron yoke around the magnets increased the electromagnetic field (EMF) efficiency.…”

Section: Introductionsupporting

confidence: 69%

“…Table 1 compares previously reported energy harvesting devices based on their maximum voltage and maximum frequency. Most devices operate below 10 Hz [ 10 , 13 , 15 , 18 ] with voltages between 9–31 mV. On the other hand, generators that operate at a frequency of 30 Hz tend to have a voltage of around 1 mV showing an inverse relationship between voltage and frequency for this type of liquid energy harvesting device.…”

Section: Resultsmentioning

confidence: 99%

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Liquid Vibration Energy Harvesting Device Using Ferrofluids

Hannon,

Harrison,

Kraśny

et al. 2023

Micromachines

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Mechanical vibrations can be effectively converted into electrical energy using a liquid type of energy harvesting device comprised of a ferrofluid and a permanent magnet-inductor coil assembly. Compared to solid vibration energy harvesting devices, the liquid nature of the ferrofluid overcomes space conformity limitations which allow for the utilization of a wider range of previously inaccessible mechanical vibration energy sources for electricity generation and sensing. This report describes the design and the governing equations for the proposed liquid vibration energy harvesting device and demonstrates vibration energy harvesting at frequencies of up to 33 Hz while generating up to 1.1 mV. The proposed design can continuously convert mechanical into electrical energy for direct discharge or accumulation and storage of electrical energy.

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Section: Introductionsupporting

confidence: 69%

Section: Resultsmentioning

confidence: 99%

Liquid Vibration Energy Harvesting Device Using Ferrofluids

Hannon,

Harrison,

Kraśny

et al. 2023

Micromachines

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show abstract

“…The generation of energy using magnetic field was observed by inducing Electro motive Force (emf) in a coil due to oscillat ing nature of the magnetic nanoparticles in ferrofluid [11]. Ferro flu ids are colloidal liquids made up of nanoscale permanent magnetic dipoles, can change shape freely and has ability to generate an electro motive force (emf) fro m s mall v ibrations.…”

Section: Introductionmentioning

confidence: 99%

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2017

IJERA

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Ferrofluids are stable suspension of ferrimagnetic nanoparticles in hydrocarbon carrier. This flu id is used for harvesting energy using energy conversion device which is presented in this work. The device consists of two chambers, they are hot and cold chamber in which differential magnetization is lin ked with an inductor. Classically very small value of coupling coefficient |k| has been observed. System configuration shows an emf generation rate of about 44.4µV/K. Presented work shows another way of harvesting energy. Ferrofluid havin g a particle size o f 21n m was used in this case.

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3D‐Printed Underwater Super‐Oleophobic Shark Skin toward the Electricity Generation through Low‐Adhesion Sliding of Magnetic Nanofluid Droplets

Huang

Wang

et al. 2021

Adv Funct Materials

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Sustainable energy supply by converting mechanical to electric energy is critical for flexible electronic technologies, soft robots, and biomedical applications. The development of magnetoelectric conversion approaches requires new strategies with lightweight, small, and portable features. To address this need, an underwater magnetic nanofluid droplet‐based generator (UMNDG) is designed to convert the mechanical energy of sliding droplets to electricity. The UMNDG consists of four parts: 3D‐printed underwater superoleophobic surface bioinspired by shark skin, oily magnetic nanofluid droplets, bottom coil, and magnetic part. By improving the manufacturing parameters of 3D‐printed shark skin, underwater superoleophobic and low‐adhesion surfaces can be fabricated, allowing for the magnetic nanofluid droplets to slide upon the surfaces freely. When the magnetic nanofluid droplets slide/leave the bottom coil/magnet region, the magnetic flux passes through the coil changes, yielding the generation of electricity. Maxwell simulation is used to study related working mechanism. Finally, a ladder‐type setup consisting of four UMNDGs is assembled in series, enabling to trigger the lighting of a LED bulb by continuous sliding of magnetic nanofluid droplets. Such a setup design may find use in a wide range of applications, from flexible electronic technologies to bio‐inspired materials that interface with magnetic nanofluid systems.

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Analysis of Electromotive Force Characteristics for Electromagnetic Energy Harvester using Ferrofluid

Cited by 16 publications

References 8 publications

Liquid Vibration Energy Harvesting Device Using Ferrofluids

Liquid Vibration Energy Harvesting Device Using Ferrofluids

Untitled

3D‐Printed Underwater Super‐Oleophobic Shark Skin toward the Electricity Generation through Low‐Adhesion Sliding of Magnetic Nanofluid Droplets

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