Title :
Calibration of inductive heater for stability test of cable in conduit conductor
Author :
Seo, Kazutaka ; Takahata, Kazuya ; Mito, Toshiyuki ; Hayashi, Hidemi ; Terazono, Kanichi ; Semba, Tomoyuki ; Miyashita, Katsumi
fDate :
6/1/2005 12:00:00 AM
Abstract :
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.
Keywords :
calibration; eddy current losses; induction heating; materials testing; mechanical stability; superconducting cables; AC power supply; CICC; cable in conduit conductor; cable stability test; coupling current loss; eddy current loss; eddy currents; inductive heater calibration; interstrand coupling loss; pulse power supply; resistive induction coil; Calibration; Conductors; Eddy currents; Frequency; Heating; Magnetic flux; Pulsed power supplies; Stability; Superconducting cables; Testing; CICC; eddy current; inductive heating; stability test;
Journal_Title :
Applied Superconductivity, IEEE Transactions on
DOI :
10.1109/TASC.2005.849242