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Tunable spring bala...
Tunable spring balanced magnetic energy harvester for low frequencies and small displacements
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- Bjurström, Johan (författare)
- RISE,Smart hårdvara,Chalmers University of Technology, Sweden,RISE Research Institutes of Sweden AB, Gothenburg, Sweden; Chalmers Tekniska HÖgskola, Gothenburg, Sweden,Chalmers tekniska högskola,RISE Research Institutes of Sweden
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- Ohlsson, Fredrik (författare)
- Umeå universitet,RISE,Umeå University, Sweden,Institutionen för matematik och matematisk statistik,RISE Research Institutes of Sweden AB, Gothenburg, Sweden,RISE Research Institutes of Sweden
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- Vikerfors, Andreas (författare)
- ReVibe Energy AB, Gothenburg, Sweden
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- Rusu, Cristina (författare)
- RISE,Smart hårdvara,RISE Research Institutes of Sweden AB, Gothenburg, Sweden,RISE Research Institutes of Sweden
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- Johansson, Christer (författare)
- RISE,Smart hårdvara,RISE Research Institutes of Sweden AB, Gothenburg, Sweden,RISE Research Institutes of Sweden
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(creator_code:org_t)
- Elsevier Ltd, 2022
- 2022
- Engelska.
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Ingår i: Energy Conversion and Management. - : Elsevier Ltd. - 0196-8904 .- 1879-2227. ; 259
- Relaterad länk:
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https://doi.org/10.1...
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https://umu.diva-por... (primary) (Raw object)
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https://research.cha... (primary) (free)
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https://urn.kb.se/re...
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https://doi.org/10.1...
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https://urn.kb.se/re...
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https://research.cha...
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Abstract
Ämnesord
Stäng
- In this paper we present a novel concept to efficiently harvest vibrational energy at low frequencies and very small displacement. We describe and evaluate an electromagnetic energy harvester which generates power from a magnetic circuit with motion induced variations of an air gap. External vibrations induce oscillations of the gap length around an equilibrium point, due to a linear spring counteracting the magnetic force. The relative position of the spring can be adjusted to optimize the harvester output for excitation amplitude and frequency. A simulation model is built in COMSOL and verified by comparison with lab measurements. The simulation model is used to determine the potential performance of the proposed concept under both harmonic and non-harmonic excitation. Under harmonic excitation, we achieve a simulated RMS load power of 26.5 μW at 22 Hz and 0.028 g acceleration amplitude. From a set of comparable EH we achieve the highest theoretical power metric of 1712.2 µW/cm3/g2 while maintaining the largest relative bandwidth of 81.8%. Using measured non-harmonic vibration data, with a mean acceleration of 0.039 g, resulted in a mean power of 52 μW. Moreover, the simplicity and robustness of our design makes it a competitive alternative for use in practical situations.
Ämnesord
- TEKNIK OCH TEKNOLOGIER -- Materialteknik -- Metallurgi och metalliska material (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Materials Engineering -- Metallurgy and Metallic Materials (hsv//eng)
- TEKNIK OCH TEKNOLOGIER -- Maskinteknik -- Teknisk mekanik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Mechanical Engineering -- Applied Mechanics (hsv//eng)
- TEKNIK OCH TEKNOLOGIER -- Naturresursteknik -- Marin teknik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Environmental Engineering -- Marine Engineering (hsv//eng)
- TEKNIK OCH TEKNOLOGIER -- Elektroteknik och elektronik -- Annan elektroteknik och elektronik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Electrical Engineering, Electronic Engineering, Information Engineering -- Other Electrical Engineering, Electronic Engineering, Information Engineering (hsv//eng)
Nyckelord
- Automotive safety
- Electromagnetic induction
- Low frequency
- Nonlinear dynamics
- Small amplitude excitation
- Vibration energy harvesting
- Electric excitation
- Electromagnetic waves
- Harmonic analysis
- Magnetic circuits
- Vehicle safety
- Amplitude excitation
- Energy Harvester
- Harmonic excitation
- Lower frequencies
- Simulation model
- Small amplitude
- Small displacement
- Energy harvesting
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
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