A superconducting high-speed flywheel energy storage system

Andrade, R. de; Ferreira, A.C.; Sotelo, Guilherme Gonçalves; Suemitsu, W.I.; Rolim, L.G.B.; Neto, J.L.S.; Neves, Marcelo A. S.; Santos, Veruska Andrea; Costa, Glória Meyberg Nunes; Rosario, M.A.P.; Stephan, R.M.; Nicolsky, R.

doi:10.1016/j.physc.2004.03.168

Cited by 22 publications

(11 citation statements)

References 3 publications

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“…The stiffness, axial and radial, and damping of SMB-A was measured in a previous work [5]. The stiffness, axial and radial, increases strongly when the superconductors are cooled in the magnetic field of the bearing, reaching 74.5 N/mm for a cooling distance of 3 mm, which results in a gap of 1.9 mm.…”

Section: B Superconducting Magnetic Bearingmentioning

confidence: 80%

“…The permanent magnets rotors, Fig. 2, are assembled with magnetic flux shapers, in order to increase the levitation force and the stiffness [5], [7]. SMB-A uses a set of brick shaped magnets, , assembled in a ring arrangement, Fig.…”

Section: B Superconducting Magnetic Bearingmentioning

confidence: 99%

“…It is usual to employ a permanent magnet synchronous machine in flywheel applications [2], [4], but the permanent magnet machines always have idling losses because of eddy currents induced by the magnetic field on the stator. This can be avoided using a switched reluctance machine (SRM), which has a null idle magnetic field [5], [6]. The SRM can work at very wide speed ranges: from zero up to several ten thousand rpm; it is fault tolerant and has extremely low idling losses.…”

mentioning

confidence: 99%

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Voltage Sags Compensation Using a Superconducting Flywheel Energy Storage System

Andrade

Ferreira

Sotelo

et al. 2005

IEEE Trans. Appl. Supercond.

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Abstract-This paper presents a voltage sag compensator, which uses a flywheel energy storage system with superconducting magnetic axial thrust bearing (SMB) and a permanent magnet radial bearing (PMB). The SMB was built with Nd-Fe-B magnet and YBCO superconducting blocks, refrigerated with liquid Nitrogen. The magnets are assembled with magnetic flux shapers in order to increase the levitation force and the stiffness. The radial PMB is used to positioning the vertically arranged switched reluctance machine (SRM) used as motor/generator. Simulations of the power electronics and SRM show that the system can work up to 30,000 rpm supplying the required energy during disturbances.

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Section: B Superconducting Magnetic Bearingmentioning

confidence: 80%

Section: B Superconducting Magnetic Bearingmentioning

confidence: 99%

mentioning

confidence: 99%

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Voltage Sags Compensation Using a Superconducting Flywheel Energy Storage System

Andrade

Ferreira

Sotelo

et al. 2005

IEEE Trans. Appl. Supercond.

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“…It assumes that the macroscopic field distribution in type-II superconductor can be determined from the balance between Lorentz and pinning forces on the fluxoids. Using Faraday's law and the definition of the magnetic vector potential , it can be written: (1) where is the electrical potential and is the magnetic vector potential.…”

Section: The Levitation Force In Smbmentioning

confidence: 99%

“…These passive magnetic bearings have been developed at the Federal University of Rio de Janeiro, to operate in a flywheel energy storage system [1]. The purpose of this equipment is store energy in the flywheel and recover this mechanical energy whenever necessary.…”

mentioning

confidence: 99%

Halbach Array Superconducting Magnetic Bearing for a Flywheel Energy Storage System

Sotelo

Ferreira

Andrade

2005

IEEE Trans. Appl. Supercond.

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Abstract-In order to develop a new magnetic bearing set for a flywheel energy storage prototype, it was designed and simulated some configurations of Permanent Magnetic Bearings (PMB) and Superconducting Magnetic Bearings (SMB). The bearings were assembled with Nd-Fe-B permanent magnets and the simulations were carried out with the Finite Element Method (FEM). The PMB was designed to reduce the load on SMB and provide radial positioning of the whole set. SMB were designed with YBCO superconductors and an assembly of permanent magnets. Several configurations of permanent magnets were simulated, trying to maximize the magnetic flux gradient in direction orthogonal to the movement and flux density in the surface of the superconductors. Early experiments have shown an increasing stiffness and levitation force with increasing field gradient and intensity. It was also a goal to reduce the stray field outside the bearing. The levitation force of the SMB using a flux shapers configuration was measured and compared with FEM simulation, showing very good agreement. The simulation of a SMB using Halbach array configuration shows that it increases the levitation force and reduces the stray field.

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Investigation of structural, superconducting and mechanical properties of Co/Cu substituted YBCO-358 ceramic composites

Öztürk

Arebat

Nefrow

et al. 2019

J Mater Sci: Mater Electron

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A superconducting high-speed flywheel energy storage system

Cited by 22 publications

References 3 publications

Voltage Sags Compensation Using a Superconducting Flywheel Energy Storage System

Voltage Sags Compensation Using a Superconducting Flywheel Energy Storage System

Halbach Array Superconducting Magnetic Bearing for a Flywheel Energy Storage System

Investigation of structural, superconducting and mechanical properties of Co/Cu substituted YBCO-358 ceramic composites

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