Superconducting axial bearing for induction machines with active radial magnetic bearings

Nicolsky, R.; Gorelov, Y.A.; Pereira, A.S.; David, D.F.B.; Santisteban, A.; Stephan, R.M.; Ripper, A.; Andrade, R. de; Gawalek, W.; Habisreuther, T.; Strasser, T.

doi:10.1109/77.783458

Cited by 13 publications

(3 citation statements)

References 4 publications

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“…A different structure for magnetic bearings, here named Type B, is possible, with four windings that lead to interconnected magnetic loops, as depicted in Figure 2. This structure is found in the split-winding self-bearing motors researched in Brazil [4][5][6][7][8][9][10], among others. In that approach, to provide a simultaneous torque, alternate currents are injected into the windings; for AMBs, DC currents are considered.…”

Section: Introductionmentioning

confidence: 99%

Modeling and Testing Strategies for an Interconnected Four-Pole Magnetic Bearing

2017

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An unusual idea for the construction of active magnetic bearings has been recently discussed in the literature. Theoretical results predict a greater equivalent stiffness for it, when compared with traditional active magnetic bearings. The development of a mathematical model that allows these predictions and the use of recently-built prototypes for testing if the expectations hold true are the main goals of this paper.

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Section: Introductionmentioning

confidence: 99%

Modeling and Testing Strategies for an Interconnected Four-Pole Magnetic Bearing

2017

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“…However, no study of motion has been discussed. Superconducting in axial bearings for active induction devices are further discussed by Nikolsky et al in [10] but point to point procedures of coil design and fully lab developed prototypes have not been discussed anywhere. Yang et al have also introduced development of force modelling instrument for EM system in [11].…”

Section: Introductionmentioning

confidence: 99%

Design, analysis, set‐up fabrication, control, and a novel analytical approach of a levitation prototype for a symmetric shaped object

Kundu

2022

Asian Journal of Control

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This paper highlights the design, electromagnetic analysis, system modelling, set-up fabrication, and finally control of an attraction type lab developed levitation prototype. The objectives of this work are parameters' evaluation, for example, force, inductance, and current-air-gap characteristics using a novel analytical model, electromagnetic results, and practical experiments.The FE model has been built using standard packages. A novel permeance function-based approach is developed for the analytical evaluation of parameters. These are verified by actual experiments too with excellent correlation between the sets of results. Agreement between analytical and practical values also show that the modelling is perfect and reliable which further leads to accurate design, fabrication, and implementation of the controller. A simple but reliable controller has been designed, analyzed, and implemented. The performances have been significantly improved. Finally, the steel object has been successfully and steadily levitated in robust condition.

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“…Instead of this concept, there is foreseen the use of a self-stable axial levitating system based on the repulsion between permanent magnets and superconducting bulk blocks with large grains. It is remarkable that the repulsion force occurs in a stable and suitable way, as described in [8].…”

Section: Introductionmentioning

confidence: 99%

Superconducting-electromagnetic hybrid bearing using YBCO bulk blocks for passive axial levitation

Nicolsky¹,

Andrade²,

Ripper

et al. 2000

Supercond. Sci. Technol.

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A superconducting/electromagnetic hybrid bearing has been designed using active radial electromagnetic positioning and a superconducting passive axial levitator. This bearing has been tested for an induction machine with a vertical shaft. The prototype was conceived as a four-pole, two-phase induction machine using specially designed stator windings for delivering torque and radial positioning simultaneously. The radial bearing uses four eddy-current sensors, displaced 90 • from each other, for measuring the shaft position and a PID control system for feeding back the currents. The stator windings have been adapted from the ones of a standard induction motor. The superconducting axial bearing has been assembled with commercial NdFeB permanent magnets and a set of seven top-seeded-melt-textured YBCO large-grain cylindrical blocks. The bearing set-up was previously simulated by a finite element method for different permanent magnet-superconductor block configurations. The stiffness of the superconducting axial bearing has been investigated by measuring by a dynamic method the vertical and transversal elastic constants for different field cooling processes. The resulting elastic constants show a linear dependence on the air gap, i.e. the clearance between the permanent magnet assembly and the set of superconducting large-grain blocks, which is dependent on cooling distance.

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Superconducting axial bearing for induction machines with active radial magnetic bearings

Cited by 13 publications

References 4 publications

Modeling and Testing Strategies for an Interconnected Four-Pole Magnetic Bearing

Modeling and Testing Strategies for an Interconnected Four-Pole Magnetic Bearing

Design, analysis, set‐up fabrication, control, and a novel analytical approach of a levitation prototype for a symmetric shaped object

Superconducting-electromagnetic hybrid bearing using YBCO bulk blocks for passive axial levitation

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