Realization of a Diamagnetically Levitating Rotor Driven by Electrostatic Field

Xu, Yuanping; Cui, Qingsong; Kan, Ryosuke; Bleuler, Hannes; Zhou, Jin

doi:10.1109/tmech.2017.2718102

Cited by 35 publications

(11 citation statements)

References 18 publications

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“…[126,132] Combining diamagnetic and electric force fields, Kauffmann et al successfully levitated several repulsively charged picolitre droplets, performed in a ∼1 mm 2 adjustable flat magnetic well, which was provided by a centimeter-sized cylindrical permanent magnet structure [128]. The application of the HLMA using the same combination in micro-motors was exhibited by Liu et al [129] and Xu et al [130].…”

Section: Hybrid Levitation Micro-actuatorsmentioning

confidence: 99%

Levitating Micro-Actuators: A Review

et al. 2018

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Through remote forces, levitating micro-actuators completely eliminate mechanical attachment between the stationary and moving parts of a micro-actuator, thus providing a fundamental solution to overcoming the domination of friction over inertial forces at the micro-scale. Eliminating the usual mechanical constraints promises micro-actuators with increased operational capabilities and low dissipation energy. Further reduction of friction and hence dissipation by means of vacuum leads to dramatic increases of performance when compared to mechanically tethered counterparts. In order to efficiently employ the benefits provided by levitation, micro-actuators are classified according to their physical principles as well as by their combinations. Different operating principles, structures, materials and fabrication methods are considered. A detailed analysis of the significant achievements in the technology of micro-optics, micro-magnets and micro-coil fabrication, along with the development of new magnetic materials during recent decades, which has driven the creation of new application domains for levitating micro-actuators is performed.

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Section: Hybrid Levitation Micro-actuatorsmentioning

confidence: 99%

Levitating Micro-Actuators: A Review

et al. 2018

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“…In our previous work, we developed a diamagnetic contactless suspension rotor driven by electrostatic glass motor [19][20]. Here, a more compact test rig consisting of rotor, electrostatic glass motor and array of permanent magnets is designed.…”

Section: Description Of the Diamagnetic Levitation Test Rigmentioning

confidence: 99%

“…Meanwhile, without the need of energy supply, both statically and dynamically stable diamagnetic levitation can be easily achieved at room temperature. These features make diamagnetic levitation quite appealing for modern micro mechanical system such as microscale separation or manipulation [12] and micro rotor bearing system [13][14][15][16][17][18][19][20]. Additionally, the inherent characterization of low stiffness in diamagnetic levitation system permits its potential application in high-sensitivity sensor [21][22][23][24] and ultra-low frequency energy harvesters [25][26].…”

Section: Introductionmentioning

confidence: 99%

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Modeling and Validation of Diamagnetic Rotor Levitated by Permanent Magnetics

Xu¹,

Zhang²,

Zhou³

et al. 2020

Preprint

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Featured as an innovative powerless and low stiffness suspension approach, diamagnetic levitation technique has trigged intensive interest because of its potential applicability in miniaturized mechanical system. The foundation of diamagnetic levitation system lies in mathematical modeling, which is essential for operating performance optimization and stability predication. However, to date, few literatures concerning the systematic mathematical modeling has been reported. Herein, in this work, a systematic mathematic model for disc-shaped diamagnetically levitated rotor on permanent magnets array is proposed. Based on the proposed model, the magnetic field distribution characteristics, diamagnetic levitation force characteristics (i.e. levitation height and stiffness) expressions and the optimized theorical conditions for realizing stable levitation are achieved. Experiments are also performed to dig out the relationship between levitation height and levitation force. Moreover, the operating stability of rotor under different conditions is evaluated. The experimental results are well in accordance with the theorical predications, confirming the feasibility of this mathematic model.

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“…In particular, the capabilities of µ-HCS were demonstrated in applications as micro-motors [25], micro-accelerators [26] and micro-gyroscopes [27,28]. A wide range of different operational modes, such as linear and angular positioning, bistable linear and angular actuation and the adjustment of the stiffness components of µ-HCS, were demonstrated and experimentally studied in the prototype reported in [29].…”

Section: Introductionmentioning

confidence: 99%

Modeling a Pull-In Instability in Micro-Machined Hybrid Contactless Suspension

Poletkin

Korvink

2018

Actuators

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A micro-machined hybrid contactless suspension, in which a conductive proof mass is inductively levitated within an electrostatic field, is studied. This hybrid suspension has the unique capability to control the stiffness, in particular along the vertical direction, over a wide range, which is limited by a pull-in instability. A prototype of the suspension was micro-fabricated, and the decrease of the vertical component of the stiffness by a factor of 25% was successfully demonstrated. In order to study the pull-in phenomenon of this suspension, an analytical model was developed. Assuming quasi-static behavior of the levitated proof mass, the static and dynamic pull-in of the suspension was comprehensively studied, also yielding a definition for the pull-in parameters of the hybrid suspension.

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Realization of a Diamagnetically Levitating Rotor Driven by Electrostatic Field

Cited by 35 publications

References 18 publications

Levitating Micro-Actuators: A Review

Levitating Micro-Actuators: A Review

Modeling and Validation of Diamagnetic Rotor Levitated by Permanent Magnetics

Modeling a Pull-In Instability in Micro-Machined Hybrid Contactless Suspension

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