### Abstract

Smooth voltage-current characteristics and very low thermal conductivity of high temperature superconductors (HTS) materials lead to the pronounced difference of the actual AC losses from the values predicted by Bean's critical state model. To calculate AC losses in HTS, the approach is suggested which takes into account actual voltage-current characteristics of HTS and heating due to AC losses. This approach is based on the ideology of the critical state model with an effective critical current density depending on the local magnetic field and the local temperature. For low magnetic fields, when the heating can be negligible, the analytical solution for AC losses is obtained. The theoretical results explain experimentally observed dependencies of AC losses on the frequency and amplitude of the magnetic field. It is shown that a small variation of the approximation parameters for the voltage-current characteristic of HTS leads to the pronounced change of the calculation result.

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

Pages (from-to) | 260-264 |

Number of pages | 5 |

Journal | Physica C: Superconductivity and its Applications |

Volume | 354 |

Issue number | 1-4 |

DOIs | |

Publication status | Published - May 2001 |

### Fingerprint

### Keywords

- AC losses
- Bean's model
- Critical state
- HTS

### ASJC Scopus subject areas

- Condensed Matter Physics

### Cite this

_{c}bulk superconductors.

*Physica C: Superconductivity and its Applications*,

*354*(1-4), 260-264. https://doi.org/10.1016/S0921-4534(01)00075-2

**AC loss problem in high-T _{c} bulk superconductors.** / Meerovich, V.; Sokolovsky, V.; Goren, S.; Vajda, I.

Research output: Contribution to journal › Article

_{c}bulk superconductors',

*Physica C: Superconductivity and its Applications*, vol. 354, no. 1-4, pp. 260-264. https://doi.org/10.1016/S0921-4534(01)00075-2

_{c}bulk superconductors. Physica C: Superconductivity and its Applications. 2001 May;354(1-4):260-264. https://doi.org/10.1016/S0921-4534(01)00075-2

}

TY - JOUR

T1 - AC loss problem in high-Tc bulk superconductors

AU - Meerovich, V.

AU - Sokolovsky, V.

AU - Goren, S.

AU - Vajda, I.

PY - 2001/5

Y1 - 2001/5

N2 - Smooth voltage-current characteristics and very low thermal conductivity of high temperature superconductors (HTS) materials lead to the pronounced difference of the actual AC losses from the values predicted by Bean's critical state model. To calculate AC losses in HTS, the approach is suggested which takes into account actual voltage-current characteristics of HTS and heating due to AC losses. This approach is based on the ideology of the critical state model with an effective critical current density depending on the local magnetic field and the local temperature. For low magnetic fields, when the heating can be negligible, the analytical solution for AC losses is obtained. The theoretical results explain experimentally observed dependencies of AC losses on the frequency and amplitude of the magnetic field. It is shown that a small variation of the approximation parameters for the voltage-current characteristic of HTS leads to the pronounced change of the calculation result.

AB - Smooth voltage-current characteristics and very low thermal conductivity of high temperature superconductors (HTS) materials lead to the pronounced difference of the actual AC losses from the values predicted by Bean's critical state model. To calculate AC losses in HTS, the approach is suggested which takes into account actual voltage-current characteristics of HTS and heating due to AC losses. This approach is based on the ideology of the critical state model with an effective critical current density depending on the local magnetic field and the local temperature. For low magnetic fields, when the heating can be negligible, the analytical solution for AC losses is obtained. The theoretical results explain experimentally observed dependencies of AC losses on the frequency and amplitude of the magnetic field. It is shown that a small variation of the approximation parameters for the voltage-current characteristic of HTS leads to the pronounced change of the calculation result.

KW - AC losses

KW - Bean's model

KW - Critical state

KW - HTS

UR - http://www.scopus.com/inward/record.url?scp=0035331902&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0035331902&partnerID=8YFLogxK

U2 - 10.1016/S0921-4534(01)00075-2

DO - 10.1016/S0921-4534(01)00075-2

M3 - Article

AN - SCOPUS:0035331902

VL - 354

SP - 260

EP - 264

JO - Physica C: Superconductivity and its Applications

JF - Physica C: Superconductivity and its Applications

SN - 0921-4534

IS - 1-4

ER -