### Abstract

AC losses are of great significance to quantify the
performance of high temperature superconducting (HTS) devices.
This paper presents a simplified model to calculate AC losses in
large 2G HTS coils, which serves as a baseline to study HTS
large scale applications such as electric machines. The model
is developed by disregarding the multilayer architecture of 2G
HTS tapes and then it goes to homogenize insulation layers and
epoxies filled in HTS coils. Therefore, a large coil consisting of
multiple HTS tapes can be analysed as a whole domain without
the necessity of considering inner details. The model presented
uses H formulation which directly solves magnetic fields, and the
general partial differential equations (PDEs) module in Comsol
Multiphysics is used to implement the model. Afterwards, the
model is used to simulate the excitation stage of a racetrack
HTS coil with 350 tapes. The AC losses in different excitation
speeds are studied

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

Title of host publication | Proceedings of 12th European Conference on Applied Superconductivity. |

Number of pages | 5 |

Publication date | 2015 |

Article number | 2A-LS-P-08.04 |

Publication status | Published - 2015 |

Event | 12th European Conference on Applied Superconductivity - Lyon, France Duration: 6 Sep 2015 → 10 Sep 2015 |

### Conference

Conference | 12th European Conference on Applied Superconductivity |
---|---|

Country | France |

City | Lyon |

Period | 06/09/2015 → 10/09/2015 |

### Keywords

- AC losses
- Coated conductors
- Finite element methods
- High temperature superconductors
- Homogenization

## Cite this

Song, X. A., Mijatovic, N., Jensen, B. B., & Holbøll, J. (2015). A Simplified Model to Calculate AC Losses in Large 2G HTS Coils. In

*Proceedings of 12th European Conference on Applied Superconductivity.*[2A-LS-P-08.04 ]