A comparison between cylindrical and cross-shaped magnetic vibration isolators: ideal and practical

Casteren, van Dteh Dave; Paulides, Jjh Johannes; Lomonova, E. A.

doi:10.1515/aee-2015-0044

Cited by 3 publications

(1 citation statement)

References 7 publications

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“…However, the system structure will be very complex if air bearings are used in some measuring or machining equipment requiring a high vacuum condition [3], such as extreme ultraviolet lithography. In contrast, owing to the advantages of no mechanical contact, vacuum compatibility (no need of liquid or gas auxiliary equipment) and low natural frequency, passive magnetic levitation vibration isolators have drew increased interest in recent years [4][5][6][7][8][9][10][11][12][13][14][15].…”

Section: Introductionmentioning

confidence: 99%

Research on typical topologies of a tubular horizontal-gap passive magnetic levitation vibration isolator

et al. 2017

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Abstract. Magnetic levitation vibration isolators have attracted more and more attention in the field of high-precision measuring and machining equipment. In this paper, we describe a tubular horizontal-gap passive magnetic levitation vibration isolator. Four typical topologies of the tubular horizontal-gap passive magnetic levitation vibration isolator are proposed. The analytical expression of magnetic force is derived. The relationship between levitation force, force density, force ripple and major structural parameters are analysed by finite element method, which is conductive to the design and optimization of the tubular horizontal-gap passive magnetic levitation vibration isolator. The force characteristics of different topologies of the tubular horizontal-gap passive magnetic levitation vibration isolator are compared and evaluated from the aspect of force density, force ripple and manufacturability. In comparison with conventional passive magnetic levitation vibration isolators, the proposed tubular horizontal-gap passive magnetic levitation vibration isolator shows advantage in higher force density.

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Section: Introductionmentioning

confidence: 99%

Research on typical topologies of a tubular horizontal-gap passive magnetic levitation vibration isolator

et al. 2017

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A study on maglev force and vibration attenuation characteristics of quasi-zero stiffness cruciform maglev isolator

Wu,

Liu,

Zhang

et al. 2024

Review of Scientific Instruments

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This paper aims to study the maglev force and vibration attenuation characteristics of quasi-zero stiffness cruciform maglev isolators (CMIs). The maglev force and stiffness of CMIs were analytically computed based on equivalent charge theory, and the transfer function of the system was conducted. The effects of magnet geometry parameters and air gap on the maglev force, stiffness, and vibration transmission characteristics of the CMI system were revealed through parametric analyses. With the increase in magnet length and width, the maximum value of maglev force increases, but the displacement range of near-zero stiffness, amplitude, and phase of the system gradually decrease. With the increase in magnet height, the displacement range of near-zero stiffness increases, while the variation in the amplitude and phase of the system has minimal impact. Meanwhile, in the Halbach array, the height variation of the magnet at different positions has different impacts on the magnetic force. As the air gap increases, the maximum value of maglev force decreases, but the amplitude and phase gradually increase, and the displacement range of near-zero stiffness first rises and then decreases. Finally, an experimental study was carried out to test the vibration attenuation characteristics of CMIs, in which sinusoidal excitation, hammer strike excitation, and random excitation were applied.

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Electromagnetic and Mechanical Characteristics Analysis of a Flat-Type Vertical-Gap Passive Magnetic Levitation Vibration Isolator

Kou

Zhou

Yang

et al. 2016

Shock and Vibration

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In this paper, we describe a flat-type vertical-gap passive magnetic levitation vibration isolator (FVPMLVI) for active vibration isolation system (AVIS). A dual-stator scheme and a special stator magnet array are adopted in the proposed FVPMLVI, which has the effect of decreasing its natural frequency, and this enhances the vibration isolation capability of the FVPMLVI. The structure, operating principle, analytical model, and electromagnetic and mechanical characteristics of the FVPMLVI are investigated. The relationship between the force characteristics (levitation force, horizontal force, force ripple, and force density) and major structural parameters (width and thickness of stator and mover magnets) is analyzed by finite element method. The experiment result is in good agreement with the theoretical analysis.

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A comparison between cylindrical and cross-shaped magnetic vibration isolators: ideal and practical

Cited by 3 publications

References 7 publications

Research on typical topologies of a tubular horizontal-gap passive magnetic levitation vibration isolator

Research on typical topologies of a tubular horizontal-gap passive magnetic levitation vibration isolator

A study on maglev force and vibration attenuation characteristics of quasi-zero stiffness cruciform maglev isolator

Electromagnetic and Mechanical Characteristics Analysis of a Flat-Type Vertical-Gap Passive Magnetic Levitation Vibration Isolator

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