Conventional and Micromachined Electromagnetic Levitation Actuators

A special issue of Actuators (ISSN 2076-0825). This special issue belongs to the section "Miniaturized and Micro Actuators".

Deadline for manuscript submissions: closed (30 November 2023) | Viewed by 7111

Special Issue Editor


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Guest Editor
School of Instrument Science and Optoelectronics Engineering, Hefei University of Technology, Hefei 230009, China
Interests: levitating micro-actuators; levitating micro-systems; inductive levitation; micro-inertial sensors; energy transfer; heat transfer; modeling; stability; pull-in dynamics
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Special Issue Information

Dear Colleagues,

Electromagnetic levitation phenomena have already become a driving force towards creating a new generation of actuators with inherent benefits, such as controllable mechanical friction and considerably extended motional range, thereby yielding actuators with wider operational capabilities, and at the same time, significantly reducing the dissipated energy. The complete elimination of mechanical attachments and, consequently, mechanical wear and control of mechanical friction by means of vacuum in such actuators open up a number of advantages, offering their further miniaturization, and significant improvements in performance, as well as the promise of actuators with longer operational lifetimes. These advantages and ongoing miniaturization promise possibilities for creating actuator systems with new functionalities, for instance, comprising of multistable mechanisms, coherent cooperative actuation and demonstratimg a wide range of different operation modes such as linear and angular positioning, bistable linear and angular actuations and the adjustment of stiffness components. This Special Issue aims to consolidate original papers and state-of-the-art reviews with a focus on levitating actuators based on electric, magnetic, inductive, diamagnetic, superconducting, optical and hybrid levitation.

The topics of interests include, but are not limited to:

  • bulk- and microfabrication, and new magnetic, optical materials and metamaterials;
  • new conceptual designs of levitating actuators for application in bearings, motors, energy-harvesters, sensors, etc., as well as microsystem actuators;
  • nonlinear phenomena in levitating actuators including coupling effects, pull-in dynamics and instability, dissipation-induced instability, chaotic behavior, etc.;
  • analytical and numerical methods related to the topic for the modeling and analysis of actuator stability and dynamics (analytical methods based on Lagrangian and Hamiltonian mechanics, FEM, topology optimization, model order reduction, etc.).

Dr. Kirill V. Poletkin
Guest Editor

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Keywords

  • actuators
  • micro-actuators
  • electromagnetic levitation
  • micro-systems
  • coils
  • magnets
  • stable levitation
  • modeling

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Published Papers (3 papers)

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Research

20 pages, 18579 KiB  
Article
A Novel Wrench–Current Decoupling Strategy to Extend the Use of Small Lookup Data for a Long-Range Maglev Planar Motor
by Chanuphon Trakarnchaiyo and Mir Behrad Khamesee
Actuators 2023, 12(9), 358; https://doi.org/10.3390/act12090358 - 13 Sep 2023
Cited by 1 | Viewed by 1653
Abstract
The maglev planar motor is one of the most promising industrial applications. The planar motor can increase flexibility in modern manufacturing with the multidirectional motion of the mover. In levitation control, the decoupling matrix is used to decouple the strong cross-coupling effect. The [...] Read more.
The maglev planar motor is one of the most promising industrial applications. The planar motor can increase flexibility in modern manufacturing with the multidirectional motion of the mover. In levitation control, the decoupling matrix is used to decouple the strong cross-coupling effect. The Lorentz force-based wrench matrices can be precomputed and stored in the lookup table. However, the motion range is restricted by the data range. This paper presents a wrench–current decoupling strategy to extend the use of small lookup data for long-range planar motion. The horizontal data range is 40 mm by 40 mm, which is determined from the minimally repetitive area of the planar coil array. The quadrant symmetry transformation is used to estimate the data for other areas. The experiment results demonstrated the accomplishment of the developed technique for long-range motion with a maximum motion stroke of 380 mm. The disc-magnet movers can levitate with a large air gap of 30 mm and have a total roll and pitch rotation range of 20 degrees. Full article
(This article belongs to the Special Issue Conventional and Micromachined Electromagnetic Levitation Actuators)
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13 pages, 3630 KiB  
Article
Experimental Study and Simulation of Pull-In Behavior in Hybrid Levitation Microactuator for Square-Shaped Proof Masses
by Emil R. Mamleyev, Chun Him Lee, Jan G. Korvink, Manfred Kohl and Kirill V. Poletkin
Actuators 2023, 12(2), 48; https://doi.org/10.3390/act12020048 - 20 Jan 2023
Cited by 2 | Viewed by 1946
Abstract
This paper presents the results of a comprehensive study of the pull-in phenomenon in the hybrid levitation microactuator (HLMA), in which square-shaped proof masses (PMs) of different sizes, namely, length sides of 2.8 and 3.2 mm and thicknesses of 25 and 10 μm [...] Read more.
This paper presents the results of a comprehensive study of the pull-in phenomenon in the hybrid levitation microactuator (HLMA), in which square-shaped proof masses (PMs) of different sizes, namely, length sides of 2.8 and 3.2 mm and thicknesses of 25 and 10 μm were electromagnetically levitated. The pull-in actuation of the square-shaped PMs was performed by the electrostatic force generated by the set of energized electrodes and acting on the bottom surface of the PMs along the vertical direction. The pull-in parameters, such as pull-in displacements and the corresponding applied pull-in voltages, were measured with the developed setup. The experimental measurements showed that the pull-in actuation is nonlinearly dependent on the size and mass of the PMs and a levitation height. In particular, it was found that PMs levitated within a height range from 140 to 170 μm can be stably displaced within a range of 30 μm. The results of measurements were extensively simulated with the developed analytical model by means of the quasi-FEM method. The direct comparison of the results of simulation and measurements showed a very good agreement between the theory and experiments. Full article
(This article belongs to the Special Issue Conventional and Micromachined Electromagnetic Levitation Actuators)
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25 pages, 29177 KiB  
Article
Development and Analysis of a Novel Magnetic Levitation System with a Feedback Controller for Additive Manufacturing Applications
by Parichit Kumar and Mir Behrad Khamesee
Actuators 2022, 11(12), 364; https://doi.org/10.3390/act11120364 - 3 Dec 2022
Cited by 4 | Viewed by 2592
Abstract
The primary goal of this study is to create a magnetic levitation system for additive manufacturing (AM) applications. The emphasis of this research is placed on Laser Directed Energy Deposition via Powder Feeding (LDED-PF). The primary benefit of using a magnetic levitation system [...] Read more.
The primary goal of this study is to create a magnetic levitation system for additive manufacturing (AM) applications. The emphasis of this research is placed on Laser Directed Energy Deposition via Powder Feeding (LDED-PF). The primary benefit of using a magnetic levitation system for AM applications is that the levitated geometry is expected to be a portion of the final part manufactured, thus eliminating the need for a substrate and reducing the post-processing operation requirement. Two novel levitation systems were designed, optimized, and manufactured. The design, optimization, and analysis were first conducted in the simulation environment using ANSYS Maxwell and then tested with experiments. The newly developed systems depicted a much-improved performance compared to the first prototype developed in a previous article written by the authors. The newly developed systems had an increase in levitation height, the surface area for powder deposition activities, the time available for AM operations, and the ability to support additional mass within the limits of allowable inputs. The compatibility of the levitation system with AM applications was also verified by testing the impact of powder deposition and the ability of the levitated disc to support added mass as a function of time with minimal loss in performance. This article also highlights the development of a novel feedback PID controller for the levitation system. To improve the overall performance of the controller, a feedforward controller was added in conjunction with the PID controller. Finally, the levitation system was shown to highlight control over levitation height and maintain constant levitation height with the addition of an added mass using the feedback controller. Full article
(This article belongs to the Special Issue Conventional and Micromachined Electromagnetic Levitation Actuators)
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