AC Losses in Multifilamentary Bi-2223/Ag Superconducting Tapes

J. Paasi; M. Lahtinen; D. Aized; S. Fleshler; G. Snitchler; A. P. Malozemoff

doi:10.1109/20.511454

AC Losses in Multifilamentary Bi-2223/Ag Superconducting Tapes

J. Paasi^*, M. Lahtinen, D. Aized, S. Fleshler, G. Snitchler, A. P. Malozemoff

^*Corresponding author for this work

Not published at VTT

Research output: Contribution to journal › Article › Scientific › peer-review

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Abstract

In this study we examined ac losses in a multifilamentary Bi-2223/Ag superconducting tape carrying ae transport current. The tape consisting of 85 filaments was helically wound to a single-layer coil. The losses were measured at 77 K in the frequency range from 1 Hz up to 250 Hz. Current amplitudes I_p were ranging from i=I_p/I_c=0.6 to 1.5, critical current I_c=15.4 A determined by the standard 1 μV/cm static electric field criterion. The roles of special loss components were considered: hysteresis, flux-creep, coupling and eddy current losses. Hysteresis losses due to the self-field of the ac transport current were found to dominate when i≤1.1. Resistive losses dominated when i>1.2. In the hysteretic regime, the higher the frequency, the smaller the losses per cycle.

Original language	English
Pages (from-to)	2792-2795
Number of pages	4
Journal	IEEE Transactions on Magnetics
Volume	32
Issue number	4 PART 2
DOIs	https://doi.org/10.1109/20.511454
Publication status	Published - 1 Dec 1996
MoE publication type	A1 Journal article-refereed

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abstract = "In this study we examined ac losses in a multifilamentary Bi-2223/Ag superconducting tape carrying ae transport current. The tape consisting of 85 filaments was helically wound to a single-layer coil. The losses were measured at 77 K in the frequency range from 1 Hz up to 250 Hz. Current amplitudes Ip were ranging from i=Ip/Ic=0.6 to 1.5, critical current Ic=15.4 A determined by the standard 1 μV/cm static electric field criterion. The roles of special loss components were considered: hysteresis, flux-creep, coupling and eddy current losses. Hysteresis losses due to the self-field of the ac transport current were found to dominate when i≤1.1. Resistive losses dominated when i>1.2. In the hysteretic regime, the higher the frequency, the smaller the losses per cycle.",

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AU - Paasi, J.

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AU - Snitchler, G.

AU - Malozemoff, A. P.

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N2 - In this study we examined ac losses in a multifilamentary Bi-2223/Ag superconducting tape carrying ae transport current. The tape consisting of 85 filaments was helically wound to a single-layer coil. The losses were measured at 77 K in the frequency range from 1 Hz up to 250 Hz. Current amplitudes Ip were ranging from i=Ip/Ic=0.6 to 1.5, critical current Ic=15.4 A determined by the standard 1 μV/cm static electric field criterion. The roles of special loss components were considered: hysteresis, flux-creep, coupling and eddy current losses. Hysteresis losses due to the self-field of the ac transport current were found to dominate when i≤1.1. Resistive losses dominated when i>1.2. In the hysteretic regime, the higher the frequency, the smaller the losses per cycle.

AB - In this study we examined ac losses in a multifilamentary Bi-2223/Ag superconducting tape carrying ae transport current. The tape consisting of 85 filaments was helically wound to a single-layer coil. The losses were measured at 77 K in the frequency range from 1 Hz up to 250 Hz. Current amplitudes Ip were ranging from i=Ip/Ic=0.6 to 1.5, critical current Ic=15.4 A determined by the standard 1 μV/cm static electric field criterion. The roles of special loss components were considered: hysteresis, flux-creep, coupling and eddy current losses. Hysteresis losses due to the self-field of the ac transport current were found to dominate when i≤1.1. Resistive losses dominated when i>1.2. In the hysteretic regime, the higher the frequency, the smaller the losses per cycle.

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AC Losses in Multifilamentary Bi-2223/Ag Superconducting Tapes

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