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Design, modeling and optimization of an m-shaped variable reluctance energy harvester for rotating applications
Mid Sweden University, Faculty of Science, Technology and Media, Department of Electronics Design.ORCID iD: 0000-0003-3222-7165
Mid Sweden University, Faculty of Science, Technology and Media, Department of Electronics Design.ORCID iD: 0000-0002-8382-0359
Mid Sweden University, Faculty of Science, Technology and Media, Department of Electronics Design.
2019 (English)In: Energy Conversion and Management, ISSN 0196-8904, E-ISSN 1879-2227, Vol. 195, p. 1280-1294Article in journal (Refereed) Published
Abstract [en]

The variable reluctance principle can be used to convert rotational kinetic energy into electrical energy, creating a Variable Reluctance Energy Harvester (VREH) based on electromagnetic induction. This can be used to implement self-sustaining wireless sensors in rotating applications. In this paper, we present and investigate a novel design of a VREH with high volumetric power density that targets low-speed rotating applications. The design uses an m-shaped pole-piece and two opposing magnets. We theoretically analyze key design parameters that influence the VREH’s output power, and relate these parameters to geometrical design factors of the proposed structure. Key design factors include the coil height, the permanent magnet height and the tooth height. A method based on numerical simulations is introduced, enabling to determine the optimal geometrical dimensions of the proposed structure under given size-constraints. The results demonstrate that the method leads to optimal structure configurations, which has been evaluated for different cases and is verified experimentally. Good agreement between numerical simulations and experiments are reported with deviations in output power estimation below 3%. The optimized m-shaped VREH, moreover, provides output power levels sufficient for wireless sensor operation, even in low-speed rotating applications.

Place, publisher, year, edition, pages
2019. Vol. 195, p. 1280-1294
Keywords [en]
Energy harvesting, Rotational energy, Variable reluctance, Power density, Design method, Sensor systems
National Category
Electrical Engineering, Electronic Engineering, Information Engineering
Identifiers
URN: urn:nbn:se:miun:diva-36250DOI: 10.1016/j.enconman.2019.05.082Scopus ID: 2-s2.0-85066501919OAI: oai:DiVA.org:miun-36250DiVA, id: diva2:1320512
Funder
Knowledge Foundation, ASIS 20140323Vinnova, 2017-03725Available from: 2019-06-05 Created: 2019-06-05 Last updated: 2019-07-09Bibliographically approved

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Xu, YeBader, SebastianOelmann, Bengt

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