2024-03-29T07:47:25Zhttps://eprints.lib.hokudai.ac.jp/dspace-oai/requestoai:eprints.lib.hokudai.ac.jp:2115/742642022-11-17T02:08:08Zhdl_2115_20053hdl_2115_145Turn-to-Turn Contact Resistance Measurement of No-Insulation REBCO Pancake CoilsNoguchi, SoMiyao, RyousukeOkusa, HaruyoshiTatsuta, TakahiroUeda, HiroshiKim, SeokBeomNo-insulation winding techniqueREBCO pancake coilturn-to-turn contact resistance measurement548The turn-to-turn contact resistance (characteristic resistance) is a very important factor to a no-insulation (NI)(RE)Ba-2 Cu3Oy (REBCO) pancake coil. It characterizes the stability and charging delay of NI REBCO pancake coils. However, the ordinary sudden-discharging method cannot measure the turnto-turn contact resistance under different conditions, such as an operating current, a temperature, and an external magnetic field. Although the turn-to-turn contact condition is strongly affected by the pressure inside of the NI REBCO coils, the feature of the contact resistance must he clarified to estimate the stability of NI REBCO coils. In this paper, we have proposed a new method to measure the turn-to-turn contact resistance applying ac current. The theory and the measurement results are also shown. The measured turn-to-turn contact resistance is reasonable, compared with that measured by the ordinary sudden-discharging method. In near future, we will measure the turn-to-turn contact resistance under different conditions by means of the proposed method.IEEE (Institute of Electrical and Electronics Engineers)Journal Articleapplication/pdfhttp://hdl.handle.net/2115/74264https://eprints.lib.hokudai.ac.jp/dspace/bitstream/2115/74264/1/FINAL%20VERSION.pdf1051-8223AA10791666IEEE transactions on applied superconductivity29546016052019-08enginfo:doi/10.1109/TASC.2019.2903643© 2019 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.author