Instabilities in multi-strand AC superconducting cables caused by longitudinal magnetic field with transverse magnetic field

Amemiya, Naoyuki; Ohizumi, T.; Ikeda, N.; Hlasnik, I.; Tsukamoto, O.

doi:10.1109/77.233695

Cited by 4 publications

(2 citation statements)

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“…Using this resistance, current density is obtained by (3) in the case of AC magnetic field . AC loss is derived from (4). is obtained to be 0.64 ms.…”

Section: B Eddy Current Loss In the Coilmentioning

confidence: 99%

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Calibration of Inductive Heater for Stability Test of Cable in Conduit Conductor

Seo¹,

Takahata²,

Mito³

et al. 2005

IEEE Trans. Appl. Supercond.

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Stability tests employing inductive heaters are useful to evaluate stability margins of cable in conduit conductors (CICC's). The inductive heater, which consists of the resistive induction-coil and the AC or pulse power supply, can introduce eddy currents in the CICC. The frequency is more than one hundred Hz and it can introduce the heat pulse with the duration of several ms. The stability test using the inductive heaters had been reported. However, the ratio of the deposited energies to the components; superconducting strands, conduit and induction-coil, have not been discussed exactly. By the inductive heater, the coupling and eddy current losses are introduced in the strand. In addition, inter-strand coupling loss, eddy current loss in the conduit and joule and/or eddy current losses in the induction-coil itself are introduced. We evaluated these kinds of losses by both experimental and numerical methods. Finally, we evaluated the quench energy margin of the cable in conduit conductor quantitatively.

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“…Using this resistance, current density is obtained by (3) in the case of AC magnetic field . AC loss is derived from (4). is obtained to be 0.64 ms.…”

Section: B Eddy Current Loss In the Coilmentioning

confidence: 99%

“…We evaluated the inter-strand coupling loss due to the longitudinal magnetic field [4]. Distributed-electric-constant circuit simulation was performed.…”

Section: Inter-strand Coupling Lossmentioning

confidence: 99%