Hybrid Tunable Magnet Actuator

Hoekwater, William B.; Ronaes, E.P.; Hossein Nia, S.H.

doi:10.1109/TIE.2023.3285984

Hybrid Tunable Magnet Actuator

Design of a Linearized Force-Flux Tunable Magnet Actuator

Journal article (2024)

Authors

William B. Hoekwater Student

E.P. Ronaes Mechatronic Systems Design

S.H. Hossein Nia Mechatronic Systems Design

Research Group

Mechatronic Systems Design

DOI: https://doi.org/10.1109/TIE.2023.3285984

Force Actuators Variable reluctance actuator Tunable magnets Magnetomechanical effects Saturation magnetization Magnetic circuits Magnetic separation Magnetic flux Magnetic hysteresis

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Published Date

2024

Language

English

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Research Group

Mechatronic Systems Design

Abstract

Recent studies have shown that tunable magnets (soft permanent magnets) can significantly reduce Joule heating in electromagnetic actuators. To achieve high motion accuracy and repeatability, this article proposes a novel actuator design with a linearized force-flux relation. In prior designs of variable reluctance tunable magnet actuators, the force and flux are related quadratically via a C-shaped actuator. Hybrid tunable magnet actuators based on biased fluxes are developed using lumped parameter models. Using finite element analysis, it is shown that the force-flux relation is symmetric linear around the mid position depending on the magnetic flux direction in the magnet. Within a position range of ±500 μm and a force range of ±20 N, the linear fit produces a negligible error of 0.08 N. Finally, this linear relationship is validated with a 0.03-N error in an experimental setup.

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