### Abstract

Considering the current capacities of the HTS tapes recently being developed, it is inevitable to use these HTS tapes in parallel in order to apply them to power transformers. But non-uniform distributions of current and large AC losses are major problems in a HTS coil with parallel superconducting tapes. Many parallel HTS tapes have been fabricated and tested so far. The results showed that we had to transpose each tape in order to reduce AC losses and have uniform distributions of current. But the measurement of the current distribution process has been quite difficult not only in the case of the parallel HTS tapes but also in the case of the coil with parallel HTS tapes. In our study, we investigated the effect of current distribution on the AC losses in parallel HTS tapes and coils with parallel superconducting tapes. The current distribution in parallel HTS tapes could be measured with small Hall sensors, the dependence of AC losses and critical current on the current distribution was analyzed. We fabricated a parallel HTS tape and HTS coil with the transposed parallel HTS tapes for an application of a power transformer. The performance of non-uniform current distribution in the parallel HTS wires is worse than that of a uniform one.

Original language | English |
---|---|

Pages (from-to) | 1271-1275 |

Number of pages | 5 |

Journal | Physica C: Superconductivity and its Applications |

Volume | 463-465 |

Issue number | SUPPL. |

DOIs | |

Publication status | Published - 2007 Oct 1 |

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### Keywords

- Current distribution
- Parallel HTS tapes

### ASJC Scopus subject areas

- Condensed Matter Physics

### Cite this

*Physica C: Superconductivity and its Applications*,

*463-465*(SUPPL.), 1271-1275. https://doi.org/10.1016/j.physc.2007.03.489

**AC loss analysis of a HTS coil with parallel superconducting tapes of unbalanced current distribution.** / Lee, S.; Byun, S.; Kim, W.; Choi, K.; Lee, Haigun.

Research output: Contribution to journal › Article

*Physica C: Superconductivity and its Applications*, vol. 463-465, no. SUPPL., pp. 1271-1275. https://doi.org/10.1016/j.physc.2007.03.489

}

TY - JOUR

T1 - AC loss analysis of a HTS coil with parallel superconducting tapes of unbalanced current distribution

AU - Lee, S.

AU - Byun, S.

AU - Kim, W.

AU - Choi, K.

AU - Lee, Haigun

PY - 2007/10/1

Y1 - 2007/10/1

N2 - Considering the current capacities of the HTS tapes recently being developed, it is inevitable to use these HTS tapes in parallel in order to apply them to power transformers. But non-uniform distributions of current and large AC losses are major problems in a HTS coil with parallel superconducting tapes. Many parallel HTS tapes have been fabricated and tested so far. The results showed that we had to transpose each tape in order to reduce AC losses and have uniform distributions of current. But the measurement of the current distribution process has been quite difficult not only in the case of the parallel HTS tapes but also in the case of the coil with parallel HTS tapes. In our study, we investigated the effect of current distribution on the AC losses in parallel HTS tapes and coils with parallel superconducting tapes. The current distribution in parallel HTS tapes could be measured with small Hall sensors, the dependence of AC losses and critical current on the current distribution was analyzed. We fabricated a parallel HTS tape and HTS coil with the transposed parallel HTS tapes for an application of a power transformer. The performance of non-uniform current distribution in the parallel HTS wires is worse than that of a uniform one.

AB - Considering the current capacities of the HTS tapes recently being developed, it is inevitable to use these HTS tapes in parallel in order to apply them to power transformers. But non-uniform distributions of current and large AC losses are major problems in a HTS coil with parallel superconducting tapes. Many parallel HTS tapes have been fabricated and tested so far. The results showed that we had to transpose each tape in order to reduce AC losses and have uniform distributions of current. But the measurement of the current distribution process has been quite difficult not only in the case of the parallel HTS tapes but also in the case of the coil with parallel HTS tapes. In our study, we investigated the effect of current distribution on the AC losses in parallel HTS tapes and coils with parallel superconducting tapes. The current distribution in parallel HTS tapes could be measured with small Hall sensors, the dependence of AC losses and critical current on the current distribution was analyzed. We fabricated a parallel HTS tape and HTS coil with the transposed parallel HTS tapes for an application of a power transformer. The performance of non-uniform current distribution in the parallel HTS wires is worse than that of a uniform one.

KW - Current distribution

KW - Parallel HTS tapes

UR - http://www.scopus.com/inward/record.url?scp=34548474296&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=34548474296&partnerID=8YFLogxK

U2 - 10.1016/j.physc.2007.03.489

DO - 10.1016/j.physc.2007.03.489

M3 - Article

AN - SCOPUS:34548474296

VL - 463-465

SP - 1271

EP - 1275

JO - Physica C: Superconductivity and its Applications

JF - Physica C: Superconductivity and its Applications

SN - 0921-4534

IS - SUPPL.

ER -