Dynamics of Rotating Superconducting Magnetic Bearings in Ring Spinning

Sparing, Maria; Berger, Anne; Wall, F.; Lux, V.; Hameister, Stefan; Berger, Dietmar; Hossain, Mahmud; Abdkader, Anwar; Fuchs, G.; Cherif, Chokri; Schultz, L.

doi:10.1109/tasc.2016.2524641

Cited by 24 publications

(18 citation statements)

References 12 publications

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“…The multi-DoF levitation force behaviour of SMB has been investigated by experimental tests, which manifest the rather complex levitation force behaviour [19,24,25]. Modelling the multi-DoF levitation force behaviour involves the difficulties in both taking into account of the highly non-linear E-J relation for superconductors and the complex multi-DoF dynamic equations.…”

Section: Introductionmentioning

confidence: 99%

Investigation on the multi‐DoF 3‐D model and levitation behaviour of radial‐type superconducting magnetic bearing

Zhang

et al. 2019

IET Electric Power Applications

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It is crucial to calculate the levitation force and model the levitation behaviour in the designation of superconducting magnetic bearing (SMB). At present, the related research focuses on the single degree of freedom (DoF) levitation behaviour of the SMB independently, for instance the axial or radial levitation force. Practically, the superconducting magnetic levitation is passive levitation at directions of multi-DoF. Additionally, the non-ideal conditions in fabrication, such as the joint effect of superconducting bulks, lead to complex 3-D-induced current distributions which generate the levitation force. There are coupling effects which affect the levitation forces at the directions of different DoFs. This paper investigates the multi-DoF modelling and levitation behaviour of the radial-type SMB. By adopting the Power-law E-J relation, the dependence of conductivity on electric field is derived to define the superconductive material. Then, the software MagNet is employed to establish the 3-D multi-DoF finite element model. Under the external disturbance of the PM rotor with axial constant speed and constant load, the multi-DoF levitation behaviours of radial-type SMB are discussed considering the joint effect of superconducting bulks. It is also obtained that the influence of the revolving speed, the static, and dynamic eccentricity on the axial levitation force. (a) Levitation forces of the 3-DoF motion, (b) Positions of the 3-DoF motion, (c) Speeds of the 3-DoF motion

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Section: Introductionmentioning

confidence: 99%

Investigation on the multi‐DoF 3‐D model and levitation behaviour of radial‐type superconducting magnetic bearing

Zhang

et al. 2019

IET Electric Power Applications

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“…Lately, most of the existing levitation systems use these two components; and regarding levitating bearings and flywheels, their application is expected to increase. In [6] a passive SMB was investigated to create a more effective twist element in the textile technological process of ring spinning since frictional wear and heat are the limiting factors for the productivity of such devices. A multi-surface levitation concept using three PMs and one HTS is studied for different configurations in [7], to reach the highest possible levitation forces in order to maximize the stiffness of a mechanical flywheel system.…”

Section: Introductionmentioning

confidence: 99%

Prototype of a Zero-Field-Cooled YBCO Bearing With Continuous Ring Permanent Magnets

Arsenio

Roque

Cardeira

et al. 2018

IEEE Trans. Appl. Supercond.

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Based on the levitating design of the Zero-Field-Cooled (ZFC) Maglev previously developed, a novel horizontal ZFC superconductor magnetic bearing (SMB) is currently being developed. However, simulations have shown that its stator and rotor made of YBCO bulks and NdFeB permanent magnets (PM), respectively, present significant magnetic discontinuities. These produce asymmetries on the bearing rotation and several stable and unstable position angles that prevent the SMB from rotating smoothly, leading to a step motor like sort of rotation. Those drawbacks are now avoided by using ring shape PMs, leading not only to a smooth rotation of the SMB but also increasing its stability. New three-dimensional finite element method simulations and a set of experimental tests with the new SMB show in this paper the viability and increased performance when ring shape PMs are used. Finally, experimental results using the prototype also show that the model fits very well with the laboratory test results.

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“…In [9,10] frictionless superconductor magnetic bearing (SMB) systems studied were designed to levitate based on the FC technique. This implies significant hysteresis losses due to the magnetic flux trapping.…”

Section: Introductionmentioning

confidence: 99%

Experimental Setup and Efficiency Evaluation of Zero-Field-Cooled (ZFC) YBCO Magnetic Bearings

Arsenio

Carvalho

Cardeira

et al. 2017

IEEE Trans. Appl. Supercond.

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Abstract-This paper presents the conception, simulation and experimental evaluation of magnetic bearings based on NdFeB magnets and zero-field-cooled (ZFC) YBCO bulk superconductors to replace the bearings of a standard electric machine. Advanced research on HTS magnetic levitation has been carried out for the construction of large scale flywheels or for industry applications. However, those approaches used fieldcooled (FC) superconductors, whereas the approach shown in this paper uses ZFC superconductors. Actually, as previously shown by the authors, ZFC implementation presents much less AC losses. The approach in our horizontal flywheel research follows the ZFC-maglev structure, where the linear track was closed into a circular one with the same diameter of the superconductor magnetic bearing. The conception and geometric placement of magnets and superconductors was designed to keep symmetry along the rotating axis and minimizing air gaps. A 3D finite element model was built for simulation and validation of the effectiveness of the solution. Experimental validation was then achieved measuring the balanced and unbalanced rotor lifting and guiding forces.

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Dynamics of Rotating Superconducting Magnetic Bearings in Ring Spinning

Cited by 24 publications

References 12 publications

Investigation on the multi‐DoF 3‐D model and levitation behaviour of radial‐type superconducting magnetic bearing

Investigation on the multi‐DoF 3‐D model and levitation behaviour of radial‐type superconducting magnetic bearing

Prototype of a Zero-Field-Cooled YBCO Bearing With Continuous Ring Permanent Magnets

Experimental Setup and Efficiency Evaluation of Zero-Field-Cooled (ZFC) YBCO Magnetic Bearings

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