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A Survey on Variable Reluctance Energy Harvesters in Low-Speed Rotating Applications
Mittuniversitetet, Fakulteten för naturvetenskap, teknik och medier, Avdelningen för elektronikkonstruktion.
Mittuniversitetet, Fakulteten för naturvetenskap, teknik och medier, Avdelningen för elektronikkonstruktion.ORCID-id: 0000-0002-8382-0359
Mittuniversitetet, Fakulteten för naturvetenskap, teknik och medier, Avdelningen för elektronikkonstruktion.
2018 (engelsk)Inngår i: IEEE Sensors Journal, ISSN 1530-437X, E-ISSN 1558-1748, Vol. 18, nr 8, s. 3426-3435Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

Energy harvesting converts ambient energy to electrical energy that can be used to power, for example, sensors and sensor systems. Variable reluctance energy harvesting is a suitable candidate for the conversion of rotary kinetic motion, an energy form commonly found in industrial applications. The implementation of a variable reluctance energy harvester, however, has a significant effect on its performance and is not well studied. In this paper, we therefore conduct a survey on different structures of variable reluctance energy harvesters. Six existing structures, previously used in variable reluctance sensors, are presented and analyzed according to their approaches for magnetic flux change improvement. Together with a newly proposed structure, these structures are evaluated based on a finite element analysis, and their results are compared. It is demonstrated that the choice of structure considerably affects the power output of the harvester and is dependent on the improvement approaches the structure utilizes. The newly proposed structure outperforms all existing structures with respect to power output and power density, which comes at a cost of higher parasitic torque generation. A 53-fold power improvement over the reference and an 1.2-fold power improvement over the next best structure is observed. As a result, applications of variable reluctance energy harvesting become viable even at low angular velocities.

sted, utgiver, år, opplag, sider
2018. Vol. 18, nr 8, s. 3426-3435
Emneord [en]
Energy harvesting, sensor systems, finite element analysis, electromagnetic induction, magnetic flux
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Identifikatorer
URN: urn:nbn:se:miun:diva-33263DOI: 10.1109/JSEN.2018.2808377ISI: 000428585900039Scopus ID: 2-s2.0-85042350692OAI: oai:DiVA.org:miun-33263DiVA, id: diva2:1190442
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SMART (Smarta system och tjänster för ett effektivt och innovativt samhälle)Tilgjengelig fra: 2018-03-14 Laget: 2018-03-14 Sist oppdatert: 2019-09-09bibliografisk kontrollert

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