A Multi-Stack Variable Stiffness Magnetic Torsion Spring for a Wave Energy Converter
Published In
2022 IEEE Energy Conversion Congress and Exposition (ECCE)
Document Type
Citation
Publication Date
10-2022
Abstract
This paper presents the design of a multi-stack high torque adjustable stiffness torsional magnetic spring for use in a wave energy converter. The torsional magnetic spring has a±45∘ linear stroke length with peak torque of 823 N⋅m A 3-D magnetostatic finite element analysis parameter sizing sweeping analysis was performed and the peak energy density for the selected torsion spring was computed to be 12.6 J/kg. The required torque was increased by using a unique seven-stage multi-stacking design. The stiffness of magnetic torsion spring is adjusted through the axial translation of the inner rotor. The presented design is shown to be capable of providing both positive and negative stiffness with equal characteristics and has a very high degree of linearity. The experimental prototype assembly and test-setup used to verify the torsional spring performance is presented.
Rights
Copyright © 2022, IEEE
Locate the Document
DOI
10.1109/ECCE50734.2022.9947751
Persistent Identifier
https://archives.pdx.edu/ds/psu/39020
Publisher
IEEE
Citation Details
Che, D., Dechant, B., Hagmüller, A., & Bird, J. Z. (2022, October). A Multi-Stack Variable Stiffness Magnetic Torsion Spring for a Wave Energy Converter. In 2022 IEEE Energy Conversion Congress and Exposition (ECCE) (pp. 1-6). IEEE.