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New Trends in Magnetic Bearings

A special issue of Applied Sciences (ISSN 2076-3417). This special issue belongs to the section "Mechanical Engineering".

Deadline for manuscript submissions: closed (30 April 2020) | Viewed by 4294

Special Issue Editors


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Guest Editor
Department of Mechanical and Aerospace Engineering, Politecnico di Torino, 10129 Torino TO, Italy
Interests: electromechanical systems; rotating machinery; magnetic bearings and dampers; piezoelectric transducers; vibration and motion control; automotive applications

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Guest Editor
Department of Mechanical and Aerospace Engineering, Politecnico di Torino, 10129 Turin, Italy
Interests: mechatronics systems for automation; electrified powertrains; assisted and autonomous driving; active and passive vibration control
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Magnetic bearings are nowadays considered a mature technology that is gaining relevant attention in several industrial fields, thanks to numerous remarkable advantages. The number of applications exploiting this technology is continuously increasing, as is the development of novel layouts and actuation architectures. In this scenario, intense research efforts are currently dedicated to the investigation of new solutions, aimed at the optimization of some relevant aspects, such as the geometry and hardware component optimization, the combination of active and passive magnetic bearings, and the control strategies. This Special Issue is aimed at point out the emerging evolutions and new perspectives of this technology, encouraging original contributions related, but not limited to, the following topics:

  • Active and passive magnetic bearings (for linear and rotating systems)
  • Electrodynamic bearings
  • Hardware components (sensors and power amplifiers)
  • Power losses reduction
  • Scaling issues
  • Control strategies
  • Touch-down bearings
  • Materials
  • Hardware reduction

Prof. Dr. Andrea Tonoli
Prof. Dr. Nicola Amati
Dr. Angelo Bonfitto
Guest Editors

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Published Papers (1 paper)

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Research

16 pages, 4998 KiB  
Article
High-Precision Roller Supported by Active Magnetic Bearings
by Cheol Hoon Park, Tae Gwang Yoon, Dongwoo Kang and Hugo Rodrigue
Appl. Sci. 2019, 9(20), 4389; https://doi.org/10.3390/app9204389 - 17 Oct 2019
Cited by 4 | Viewed by 3763
Abstract
Magnetic bearings support rotors in a non-contact way using magnetic force. Therefore, there is no friction and it is possible to measure and control the position of a rotor in the air gap. In this study, the rotational vibration of a roller was [...] Read more.
Magnetic bearings support rotors in a non-contact way using magnetic force. Therefore, there is no friction and it is possible to measure and control the position of a rotor in the air gap. In this study, the rotational vibration of a roller was minimized using magnetic bearings, and a precision roller capable of automatic alignment using the position control function of magnetic bearings was proposed. A rotation accuracy of approximately 4.6 μm (peak-to-peak) was observed, even under a rotation of 30 rev/min and a radial force load of 300 N. The rotor position control experiment for magnetic bearings showed that 1-μm resolution position control is possible. To further improve the accuracy, the automatic alignment algorithm was proposed using magnetic bearings for the roller misalignment condition, and it was confirmed that alignment is possible at a level that the pressing force difference between both ends of the roller is within 0.3 N. Through this study, it was confirmed that rollers with magnetic bearings can be applied to precision equipment. It is expected that the implementation of the automatic alignment function will simplify the equipment configuration and maintenance compared to conventional rollers with ball bearings. Full article
(This article belongs to the Special Issue New Trends in Magnetic Bearings)
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