Published In
2021 IEEE Energy Conversion Congress and Exposition (ECCE)
Document Type
Post-Print
Publication Date
11-2021
Subjects
Permanent Magnet, Finite Element Analysis
Abstract
This paper presents the analysis, mechanical design, and proof-of-principle experimental testing of a new type of adjustable stiffness torsional magnetic spring for an ocean generator application. Unlike prior published designs the rotary magnetic spring is shown to have a highly linear adjustable stroke length. The presented torsional spring is experimentally shown to be able to create a ± 45° angular stroke range with a peak torque of ± 39.1 N·m. The stiffness is adjusted by using a stepper motor to axially adjust the axial magnet offset. The stepper motor contains a brake so that power is not expended when maintaining a desired spring stiffness. It is shown that by using a series spring arrangement the stroke length can be extended to ± 90°.
Rights
© Copyright 2021 IEEE - All rights reserved.
Locate the Document
DOI
10.1109/ECCE47101.2021.9595267
Persistent Identifier
https://archives.pdx.edu/ds/psu/36770
Publisher
IEEE
Citation Details
Che, D., Bird, J. Z., Hagmuller, A., & Hossain, M. E. (2021). An Adjustable Stiffness Torsional Magnetic Spring with a Linear Stroke Length. Institute of Electrical and Electronics Engineers (IEEE). https://doi.org/10.1109/ecce47101.2021.9595267
Description
This is the author’s version of a work that was accepted for publication. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published as An Adjustable Stiffness Torsional Magnetic Spring with a Linear Stroke Length. Institute of Electrical and Electronics Engineers (IEEE). https://doi.org/10.1109/ecce47101.2021.9595267