A Test of HTS Power Cable in a Sweeping Magnetic Field

TL;DR

This study evaluates the power losses in a high-temperature superconductor (HTS) power cable subjected to a rapidly changing magnetic field, comparing experimental results with theoretical predictions.

Contribution

It provides experimental data on HTS cable losses under sweeping magnetic fields and compares them with theoretical models, enhancing understanding of AC losses in HTS cables.

Findings

Measured power losses increase with magnetic field sweep rate.

Comparison shows good agreement between experimental data and theoretical projections.

Results inform design considerations for HTS power cables in dynamic magnetic environments.

Abstract

Short sample HTS power cable composed of multiple 344C-2G strands and designed to energize a fast-cycling dipole magnet was exposed to a sweeping magnetic field in the (2-20) T/s rate. The B-field orientation toward the HTS strands wide surface was varied from 0 deg. to 10 deg., in steps of 1 deg.. The test arrangement allowed measurement of the combined hysteresis and eddy current power losses. For the validity of these measurements, the power losses of a short sample cable composed of multiple LTS wire strands were also performed to compare with the known data. The test arrangement of the power cable is described, and the test results are compared with the projections for the eddy and hysteresis power losses using the fine details of the test cable structures.