Experimental set-up for calorimetric AC loss measurements on HTS tapes in applied longitudinal magnetic fields carrying transport currents at variable temperatures
2004 (English)In: Review of Scientific Instruments, ISSN 0034-6748, E-ISSN 1089-7623, Vol. 75, no 1, 99-103 p.Article in journal (Refereed) Published
In most power devices, the conductor is carrying an ac transport current while it is exposed to an ac magnetic field transverse to the current path. In certain applications, such as multilayer power cables or the control winding in a controllable reactor, the conductors are exposed to a magnetic field component parallel with the current path that is longitudinal to the tape axis. An experimental setup to measure the losses at a different longitudinal magnetic field, transport currents, frequency, and temperature is presented. The system is based on a calorimetric measuring method. Examples are given of power loss measurements on multifilamentary Bi 2223 tapes at different longitudinal ac magnetic fields 0-250 mT peak value, frequencies 0-1000 Hz, ac transport currents 0-70 A peak value, and temperatures 55-85 K. The calorimetric technique presented is fast, accurate, and capable of measuring losses between 0.5-100 mW/m. The data obtained from the apparatus can provide an improved base for the design of power devices.
Place, publisher, year, edition, pages
2004. Vol. 75, no 1, 99-103 p.
Other Electrical Engineering, Electronic Engineering, Information Engineering
IdentifiersURN: urn:nbn:se:kth:diva-6157DOI: 10.1063/1.1633002ISI: 000187536500016ScopusID: 2-s2.0-0942267674OAI: oai:DiVA.org:kth-6157DiVA: diva2:10787
QC 20100927 QC 201110312006-09-222006-09-222011-10-31Bibliographically approved