Charging behavior in no-insulation REBCO pancake coils

Xudong Wang; Tao Wang; Erika Nakada; Atsushi Ishiyama; Ryusei Itoh; So Noguchi

doi:10.1109/TASC.2014.2365623

Charging behavior in no-insulation REBCO pancake coils

Xudong Wang^*, Tao Wang, Erika Nakada, Atsushi Ishiyama, Ryusei Itoh, So Noguchi

^*Corresponding author for this work

School of Advanced Science and Engineering

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

34 Citations (Scopus)

Abstract

This paper presents analytical studies on the charging characteristics of a no-insulation (NI) REBCO pancake coil. A partial element equivalent circuit (PEEC) model has been developed to evaluate the local current paths in NI REBCO pancake coils. The PEEC model is able to consider the asymmetry of the coil winding, the partial turn-to-turn contact electrical resistance, and the partial self and mutual inductances. The analysis results are compared with previous charging experimental results and simulations using a simplified parallel equivalent circuit (SPEC) model to validate the proposed approach with the PEEC model. To investigate the charging characteristics of a meter-class NI REBCO pancake coil, numerical simulations were performed by using the PEEC and SPEC models as a parameter of the turn-to-turn contact electrical resistance. In addition, the magnetic field in a 3-T NI REBCO coil was calculated by the SPEC model to clarify the charging delay of a practical scale magnet.

Original language	English
Article number	6939656
Journal	IEEE Transactions on Applied Superconductivity
Volume	25
Issue number	3
DOIs	https://doi.org/10.1109/TASC.2014.2365623
Publication status	Published - 2015 Jun 1

Keywords

Charging delay
high-temperature superconductors
no-insulation REBCO coil
partial element equivalent-circuit model
superconducting coils

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Electrical and Electronic Engineering

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10.1109/TASC.2014.2365623

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title = "Charging behavior in no-insulation REBCO pancake coils",

abstract = "This paper presents analytical studies on the charging characteristics of a no-insulation (NI) REBCO pancake coil. A partial element equivalent circuit (PEEC) model has been developed to evaluate the local current paths in NI REBCO pancake coils. The PEEC model is able to consider the asymmetry of the coil winding, the partial turn-to-turn contact electrical resistance, and the partial self and mutual inductances. The analysis results are compared with previous charging experimental results and simulations using a simplified parallel equivalent circuit (SPEC) model to validate the proposed approach with the PEEC model. To investigate the charging characteristics of a meter-class NI REBCO pancake coil, numerical simulations were performed by using the PEEC and SPEC models as a parameter of the turn-to-turn contact electrical resistance. In addition, the magnetic field in a 3-T NI REBCO coil was calculated by the SPEC model to clarify the charging delay of a practical scale magnet.",

keywords = "Charging delay, high-temperature superconductors, no-insulation REBCO coil, partial element equivalent-circuit model, superconducting coils",

author = "Xudong Wang and Tao Wang and Erika Nakada and Atsushi Ishiyama and Ryusei Itoh and So Noguchi",

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AU - Wang, Tao

AU - Nakada, Erika

AU - Ishiyama, Atsushi

AU - Itoh, Ryusei

AU - Noguchi, So

PY - 2015/6/1

Y1 - 2015/6/1

N2 - This paper presents analytical studies on the charging characteristics of a no-insulation (NI) REBCO pancake coil. A partial element equivalent circuit (PEEC) model has been developed to evaluate the local current paths in NI REBCO pancake coils. The PEEC model is able to consider the asymmetry of the coil winding, the partial turn-to-turn contact electrical resistance, and the partial self and mutual inductances. The analysis results are compared with previous charging experimental results and simulations using a simplified parallel equivalent circuit (SPEC) model to validate the proposed approach with the PEEC model. To investigate the charging characteristics of a meter-class NI REBCO pancake coil, numerical simulations were performed by using the PEEC and SPEC models as a parameter of the turn-to-turn contact electrical resistance. In addition, the magnetic field in a 3-T NI REBCO coil was calculated by the SPEC model to clarify the charging delay of a practical scale magnet.

AB - This paper presents analytical studies on the charging characteristics of a no-insulation (NI) REBCO pancake coil. A partial element equivalent circuit (PEEC) model has been developed to evaluate the local current paths in NI REBCO pancake coils. The PEEC model is able to consider the asymmetry of the coil winding, the partial turn-to-turn contact electrical resistance, and the partial self and mutual inductances. The analysis results are compared with previous charging experimental results and simulations using a simplified parallel equivalent circuit (SPEC) model to validate the proposed approach with the PEEC model. To investigate the charging characteristics of a meter-class NI REBCO pancake coil, numerical simulations were performed by using the PEEC and SPEC models as a parameter of the turn-to-turn contact electrical resistance. In addition, the magnetic field in a 3-T NI REBCO coil was calculated by the SPEC model to clarify the charging delay of a practical scale magnet.

KW - Charging delay

KW - high-temperature superconductors

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KW - partial element equivalent-circuit model

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Charging behavior in no-insulation REBCO pancake coils

Abstract

Keywords

ASJC Scopus subject areas

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