3-d Eddy Current Analysis of the Damper in a Superconducting Generator

Toshihiko Sugiura, Kenzo Miya, Shirabe Akita, Tadashi Kawamoto, Toshiyuki Takagi

Research output: Contribution to journalArticle

Abstract

A superconducting generator is now under intensive study as one application of superconductivity, since it has some advantages over a conventional generator. It has conductive dampers for damping vibration and for shielding field change in time. This shielding effect prevents AC joule loss from generating in the superconductors. Quantitative evaluation of the effects requires 3-D analysis of eddy currents induced in the damper. Among various methods of 3-D eddy current analysis, current vector potential method (T-method) would be efficient in terms of numerical calculation, especially when thin plate approximation holds. In this study a 3-D eddy current code based on this method has been developed and applied to eddy current analysis of the damper in a superconduting generator. Obtained results have some difference compared with results from 2-D analysis and show influences of the damper edges. Especially, decrease in shielding effect near the edge would be important for the damper design. This method of 3-D eddy current analysis would be useful for magnetomechanical design of thin conductive structures.

Original languageEnglish
Pages (from-to)997-1004
Number of pages8
JournalIEEJ Transactions on Industry Applications
Volume110
Issue number9
DOIs
Publication statusPublished - 1990
Externally publishedYes

Fingerprint

Eddy currents
Shielding
Superconductivity
Superconducting materials
Vibrations (mechanical)
Damping

ASJC Scopus subject areas

  • Industrial and Manufacturing Engineering
  • Electrical and Electronic Engineering

Cite this

3-d Eddy Current Analysis of the Damper in a Superconducting Generator. / Sugiura, Toshihiko; Miya, Kenzo; Akita, Shirabe; Kawamoto, Tadashi; Takagi, Toshiyuki.

In: IEEJ Transactions on Industry Applications, Vol. 110, No. 9, 1990, p. 997-1004.

Research output: Contribution to journalArticle

Sugiura, Toshihiko ; Miya, Kenzo ; Akita, Shirabe ; Kawamoto, Tadashi ; Takagi, Toshiyuki. / 3-d Eddy Current Analysis of the Damper in a Superconducting Generator. In: IEEJ Transactions on Industry Applications. 1990 ; Vol. 110, No. 9. pp. 997-1004.
@article{10c5fabfd238406faac7099d0f9df3b9,
title = "3-d Eddy Current Analysis of the Damper in a Superconducting Generator",
abstract = "A superconducting generator is now under intensive study as one application of superconductivity, since it has some advantages over a conventional generator. It has conductive dampers for damping vibration and for shielding field change in time. This shielding effect prevents AC joule loss from generating in the superconductors. Quantitative evaluation of the effects requires 3-D analysis of eddy currents induced in the damper. Among various methods of 3-D eddy current analysis, current vector potential method (T-method) would be efficient in terms of numerical calculation, especially when thin plate approximation holds. In this study a 3-D eddy current code based on this method has been developed and applied to eddy current analysis of the damper in a superconduting generator. Obtained results have some difference compared with results from 2-D analysis and show influences of the damper edges. Especially, decrease in shielding effect near the edge would be important for the damper design. This method of 3-D eddy current analysis would be useful for magnetomechanical design of thin conductive structures.",
author = "Toshihiko Sugiura and Kenzo Miya and Shirabe Akita and Tadashi Kawamoto and Toshiyuki Takagi",
year = "1990",
doi = "10.1541/ieejias.110.997",
language = "English",
volume = "110",
pages = "997--1004",
journal = "IEEJ Transactions on Industry Applications",
issn = "0913-6339",
publisher = "The Institute of Electrical Engineers of Japan",
number = "9",

}

TY - JOUR

T1 - 3-d Eddy Current Analysis of the Damper in a Superconducting Generator

AU - Sugiura, Toshihiko

AU - Miya, Kenzo

AU - Akita, Shirabe

AU - Kawamoto, Tadashi

AU - Takagi, Toshiyuki

PY - 1990

Y1 - 1990

N2 - A superconducting generator is now under intensive study as one application of superconductivity, since it has some advantages over a conventional generator. It has conductive dampers for damping vibration and for shielding field change in time. This shielding effect prevents AC joule loss from generating in the superconductors. Quantitative evaluation of the effects requires 3-D analysis of eddy currents induced in the damper. Among various methods of 3-D eddy current analysis, current vector potential method (T-method) would be efficient in terms of numerical calculation, especially when thin plate approximation holds. In this study a 3-D eddy current code based on this method has been developed and applied to eddy current analysis of the damper in a superconduting generator. Obtained results have some difference compared with results from 2-D analysis and show influences of the damper edges. Especially, decrease in shielding effect near the edge would be important for the damper design. This method of 3-D eddy current analysis would be useful for magnetomechanical design of thin conductive structures.

AB - A superconducting generator is now under intensive study as one application of superconductivity, since it has some advantages over a conventional generator. It has conductive dampers for damping vibration and for shielding field change in time. This shielding effect prevents AC joule loss from generating in the superconductors. Quantitative evaluation of the effects requires 3-D analysis of eddy currents induced in the damper. Among various methods of 3-D eddy current analysis, current vector potential method (T-method) would be efficient in terms of numerical calculation, especially when thin plate approximation holds. In this study a 3-D eddy current code based on this method has been developed and applied to eddy current analysis of the damper in a superconduting generator. Obtained results have some difference compared with results from 2-D analysis and show influences of the damper edges. Especially, decrease in shielding effect near the edge would be important for the damper design. This method of 3-D eddy current analysis would be useful for magnetomechanical design of thin conductive structures.

UR - http://www.scopus.com/inward/record.url?scp=85007741924&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85007741924&partnerID=8YFLogxK

U2 - 10.1541/ieejias.110.997

DO - 10.1541/ieejias.110.997

M3 - Article

AN - SCOPUS:85007741924

VL - 110

SP - 997

EP - 1004

JO - IEEJ Transactions on Industry Applications

JF - IEEJ Transactions on Industry Applications

SN - 0913-6339

IS - 9

ER -