Analysis and Experimental Testing of a New Type of Variable Stiffness Magnetic Spring with a Linear Stroke Length

Hossain, Md Emrad; Bird, Jonathan Z.; Albarran, Victor; Che, Dawei

doi:10.1109/ecce47101.2021.9595241

Analysis and Experimental Testing of a New Type of Variable Stiffness Magnetic Spring with a Linear Stroke Length

Conference · Sun Oct 10 00:00:00 EDT 2021 · 2021 IEEE Energy Conversion Congress and Exposition (ECCE)

DOI:https://doi.org/10.1109/ecce47101.2021.9595241· OSTI ID:2371239

Hossain, Md Emrad ^[1]; ^[2]; Albarran, Victor; Che, Dawei

Portland State University
Portland State Univ., OR (United States)

In this paper a new type of variable stiffness magnetic spring is proposed. The magnetic spring is composed of radially magnetized outer rotor magnets coupled with axially magnetized inner cylindrical magnets. It is shown that this magnet arrangement creates a highly linear stroke length. By rotating the inner magnetic rotor, the stiffness of the spring can be adjusted. The force as a function of stroke length and torque required to adjust the stiffness were computed using finite element analysis and then verified using an experimental test setup.

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Research Organization:: Portland State University

Sponsoring Organization:: USDOE Office of Energy Efficiency and Renewable Energy (EERE), Renewable Power Office. Water Power Technologies Office

Contributing Organization:: Portland State University

DOE Contract Number:: EE0008631

OSTI ID:: 2371239

Journal Information:: 2021 IEEE Energy Conversion Congress and Exposition (ECCE), Journal Name: 2021 IEEE Energy Conversion Congress and Exposition (ECCE)

Country of Publication:: United States

Language:: English

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