Rotation loss reduction of superconducting magnetic bearings by stacking and rearranging the shape of the bulks

M. Kita; T. Ichihara; I. Masaie; K. Demachi; N. Sakai; I. Hirabayashi

doi:10.1016/j.physc.2005.01.053

Rotation loss reduction of superconducting magnetic bearings by stacking and rearranging the shape of the bulks

M. Kita, T. Ichihara, I. Masaie, K. Demachi, N. Sakai, I. Hirabayashi

Research output: Contribution to journal › Conference article › peer-review

2 Citations (Scopus)

Abstract

Energy storage by a flywheel system has recently been developed as a promising application of high temperature superconducting bulks. Rotation loss reduction is necessary for an efficient operation of the superconducting magnetic bearings (SMB), which is the most essential component of the system. Typical radial type SMB consists of a superconductor stator and a permanent magnet rotor that is sustained by a magnetic force deduced from high flux pinning of the bulk superconductors. If the stator is a simply segmented circular array of Y-Ba-Cu-O bulks, inhomogeneity of the trapped magnetic field is unavoidable, which induces eddy currents in the metallic component in the rotor. Such a rotation loss is one of the major problems for a practical use of SMB. We will present the relationship between the inhomogeneous magnetic field and the rotation loss of SMB and give a general principle for reduction of rotation loss in SMB.

Original language	English
Pages (from-to)	821-825
Number of pages	5
Journal	Physica C: Superconductivity and its applications
Volume	426-431
Issue number	I
DOIs	https://doi.org/10.1016/j.physc.2005.01.053
Publication status	Published - 2005 Oct 1
Externally published	Yes
Event	Proceedings of the 17th International Symposium on Superconductivity (ISS 2004) Advances in Supeconductivity - Duration: 2004 Nov 23 → 2004 Nov 25

Keywords

Gd-Ba-Cu-O
Rotation loss
Superconducting magnetic bearing
Y-Ba-Cu-O

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Energy Engineering and Power Technology
Electrical and Electronic Engineering

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10.1016/j.physc.2005.01.053

Cite this

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title = "Rotation loss reduction of superconducting magnetic bearings by stacking and rearranging the shape of the bulks",

abstract = "Energy storage by a flywheel system has recently been developed as a promising application of high temperature superconducting bulks. Rotation loss reduction is necessary for an efficient operation of the superconducting magnetic bearings (SMB), which is the most essential component of the system. Typical radial type SMB consists of a superconductor stator and a permanent magnet rotor that is sustained by a magnetic force deduced from high flux pinning of the bulk superconductors. If the stator is a simply segmented circular array of Y-Ba-Cu-O bulks, inhomogeneity of the trapped magnetic field is unavoidable, which induces eddy currents in the metallic component in the rotor. Such a rotation loss is one of the major problems for a practical use of SMB. We will present the relationship between the inhomogeneous magnetic field and the rotation loss of SMB and give a general principle for reduction of rotation loss in SMB.",

keywords = "Gd-Ba-Cu-O, Rotation loss, Superconducting magnetic bearing, Y-Ba-Cu-O",

author = "M. Kita and T. Ichihara and I. Masaie and K. Demachi and N. Sakai and I. Hirabayashi",

note = "Funding Information: This work was supported by the New Energy and Industrial Technology Development Organization (NEDO) as Collaborative Research and Development of Superconducting Bearing Technologies for Flywheel Energy Storage System. Copyright: Copyright 2008 Elsevier B.V., All rights reserved.; Proceedings of the 17th International Symposium on Superconductivity (ISS 2004) Advances in Supeconductivity ; Conference date: 23-11-2004 Through 25-11-2004",

year = "2005",

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doi = "10.1016/j.physc.2005.01.053",

language = "English",

volume = "426-431",

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TY - JOUR

T1 - Rotation loss reduction of superconducting magnetic bearings by stacking and rearranging the shape of the bulks

AU - Kita, M.

AU - Ichihara, T.

AU - Masaie, I.

AU - Demachi, K.

AU - Sakai, N.

AU - Hirabayashi, I.

N1 - Funding Information: This work was supported by the New Energy and Industrial Technology Development Organization (NEDO) as Collaborative Research and Development of Superconducting Bearing Technologies for Flywheel Energy Storage System. Copyright: Copyright 2008 Elsevier B.V., All rights reserved.

PY - 2005/10/1

Y1 - 2005/10/1

N2 - Energy storage by a flywheel system has recently been developed as a promising application of high temperature superconducting bulks. Rotation loss reduction is necessary for an efficient operation of the superconducting magnetic bearings (SMB), which is the most essential component of the system. Typical radial type SMB consists of a superconductor stator and a permanent magnet rotor that is sustained by a magnetic force deduced from high flux pinning of the bulk superconductors. If the stator is a simply segmented circular array of Y-Ba-Cu-O bulks, inhomogeneity of the trapped magnetic field is unavoidable, which induces eddy currents in the metallic component in the rotor. Such a rotation loss is one of the major problems for a practical use of SMB. We will present the relationship between the inhomogeneous magnetic field and the rotation loss of SMB and give a general principle for reduction of rotation loss in SMB.

AB - Energy storage by a flywheel system has recently been developed as a promising application of high temperature superconducting bulks. Rotation loss reduction is necessary for an efficient operation of the superconducting magnetic bearings (SMB), which is the most essential component of the system. Typical radial type SMB consists of a superconductor stator and a permanent magnet rotor that is sustained by a magnetic force deduced from high flux pinning of the bulk superconductors. If the stator is a simply segmented circular array of Y-Ba-Cu-O bulks, inhomogeneity of the trapped magnetic field is unavoidable, which induces eddy currents in the metallic component in the rotor. Such a rotation loss is one of the major problems for a practical use of SMB. We will present the relationship between the inhomogeneous magnetic field and the rotation loss of SMB and give a general principle for reduction of rotation loss in SMB.

KW - Gd-Ba-Cu-O

KW - Rotation loss

KW - Superconducting magnetic bearing

KW - Y-Ba-Cu-O

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DO - 10.1016/j.physc.2005.01.053

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SN - 0921-4534

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SP - 821

EP - 825

JO - Physica C: Superconductivity and its Applications

JF - Physica C: Superconductivity and its Applications

IS - I

T2 - Proceedings of the 17th International Symposium on Superconductivity (ISS 2004) Advances in Supeconductivity

Y2 - 23 November 2004 through 25 November 2004

ER -

Rotation loss reduction of superconducting magnetic bearings by stacking and rearranging the shape of the bulks

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Keywords

ASJC Scopus subject areas

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