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Article: Study of frequency dependent AC loss in Bi-2223 tapes used for gradient coils in magnetic resonance imaging

TitleStudy of frequency dependent AC loss in Bi-2223 tapes used for gradient coils in magnetic resonance imaging
Authors
KeywordsAC self-field loss
Bi-2223 tape
Frequency dependence
Gradient coil
Issue Date2005
PublisherElsevier BV. The Journal's web site is located at http://www.elsevier.com/locate/physc
Citation
Physica C: Superconductivity And Its Applications, 2005, v. 424 n. 1-2, p. 72-78 How to Cite?
AbstractThe use of Bi-2223 tapes as the material for gradient coils in Magnetic Resonance Imaging (MRI) is promising because Bi-2223 tapes have very high critical current and very low power loss. Frequency dependent AC loss in Bi-2223 tapes was measured at the operating frequencies of gradient coil from 200 Hz up to 2000 Hz. It is found that AC loss decreases with frequency below 800 Hz and then increases from 800 Hz to 2000 Hz. The contribution of hysteresis loss, eddy current loss and resistive loss to the total AC loss are investigated individually. The power-law E-J characteristic of tapes and position dependent current distribution are considered as the major reasons for the frequency dependence below 800 Hz. Eddy current loss should account for the increasing power loss with frequency above 800 Hz. © 2005 Elsevier B.V. All rights reserved.
Persistent Identifierhttp://hdl.handle.net/10722/73661
ISSN
2015 Impact Factor: 0.835
2015 SCImago Journal Rankings: 0.472
ISI Accession Number ID
References

 

DC FieldValueLanguage
dc.contributor.authorYuan, Jen_HK
dc.contributor.authorFang, Jen_HK
dc.contributor.authorQu, Pen_HK
dc.contributor.authorShen, GXen_HK
dc.contributor.authorHan, ZHen_HK
dc.date.accessioned2010-09-06T06:53:32Z-
dc.date.available2010-09-06T06:53:32Z-
dc.date.issued2005en_HK
dc.identifier.citationPhysica C: Superconductivity And Its Applications, 2005, v. 424 n. 1-2, p. 72-78en_HK
dc.identifier.issn0921-4534en_HK
dc.identifier.urihttp://hdl.handle.net/10722/73661-
dc.description.abstractThe use of Bi-2223 tapes as the material for gradient coils in Magnetic Resonance Imaging (MRI) is promising because Bi-2223 tapes have very high critical current and very low power loss. Frequency dependent AC loss in Bi-2223 tapes was measured at the operating frequencies of gradient coil from 200 Hz up to 2000 Hz. It is found that AC loss decreases with frequency below 800 Hz and then increases from 800 Hz to 2000 Hz. The contribution of hysteresis loss, eddy current loss and resistive loss to the total AC loss are investigated individually. The power-law E-J characteristic of tapes and position dependent current distribution are considered as the major reasons for the frequency dependence below 800 Hz. Eddy current loss should account for the increasing power loss with frequency above 800 Hz. © 2005 Elsevier B.V. All rights reserved.en_HK
dc.languageengen_HK
dc.publisherElsevier BV. The Journal's web site is located at http://www.elsevier.com/locate/physcen_HK
dc.relation.ispartofPhysica C: Superconductivity and its Applicationsen_HK
dc.subjectAC self-field lossen_HK
dc.subjectBi-2223 tapeen_HK
dc.subjectFrequency dependenceen_HK
dc.subjectGradient coilen_HK
dc.titleStudy of frequency dependent AC loss in Bi-2223 tapes used for gradient coils in magnetic resonance imagingen_HK
dc.typeArticleen_HK
dc.identifier.openurlhttp://library.hku.hk:4550/resserv?sid=HKU:IR&issn=0921-4534&volume=424&issue=1-2&spage=72&epage=78&date=2005&atitle=Study+of+frequency+dependent+AC+loss+in+Bi-2223+tapes+used+for+gradient+coils+in+magnetic+resonance+imagingen_HK
dc.identifier.emailShen, GX: gxshen@eee.hku.hken_HK
dc.identifier.authorityShen, GX=rp00166en_HK
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1016/j.physc.2005.04.022en_HK
dc.identifier.scopuseid_2-s2.0-21644444647en_HK
dc.identifier.hkuros104513en_HK
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-21644444647&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume424en_HK
dc.identifier.issue1-2en_HK
dc.identifier.spage72en_HK
dc.identifier.epage78en_HK
dc.identifier.isiWOS:000230805700009-
dc.publisher.placeNetherlandsen_HK
dc.identifier.scopusauthoridYuan, J=35788305600en_HK
dc.identifier.scopusauthoridFang, J=23492142600en_HK
dc.identifier.scopusauthoridQu, P=36838745800en_HK
dc.identifier.scopusauthoridShen, GX=7401967224en_HK
dc.identifier.scopusauthoridHan, ZH=34975050400en_HK

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