Skip to Main content Skip to Navigation
Theses

Caractérisation des supraconducteurs à haute température critique en vue d'application en électrotechnique

Abstract : The main of this thesis is the characterization of high critical temperature superconductors (HTS). First, we have presented the generality of the HTS. The possible use in the future, of the HTS for the transport current, involves to study more particularly the losses in self-field, or fed by a sinusoidal current. Then we have recalled the losses calculations based on the Bean model critical state for various forms of the sample, as a plate, a cylinder, a tube cylindrical hollow and an HTS cable. For the second time, we have characterized the HTS which allows make the characteristics E(J), U(I), Jc(B), and n(B) of an HTS tube cylindrical hollow. The characterization has been made by the electrical method. Then we have tried a self-field compensation of an HTS tube by two different methods. After we have measured the magnetic field diffusion in an HTS plate and we have determined its Jc by the magnetic field measurement in complete penetration. In the last time, we have calculated analytically the losses in self-field of the HTS tube, using the Bean model critical state. We have also showed that in self-field, the magnetic field penetration inside the HTS material happens in order. First of all, there is magnetic field incomplete penetration from outside to inside the material, then when the penetration is complete, the magnetic field increase uniformly throughout the material. These losses calculation results have been compared to measurement results, this comparison shows a clear coincidence. For the last experiment, we have measured and analysed the losses in an HTS coils fed by a sinusoidal current 50Hz frequency. These results have showed that the losses of this HTS coils are mainly losses in the superconducting material and not in the superconducting matrix.
Complete list of metadatas

Cited literature [21 references]  Display  Hide  Download

https://hal.univ-lorraine.fr/tel-01746393
Contributor : Thèses Ul <>
Submitted on : Thursday, March 29, 2018 - 10:33:29 AM
Last modification on : Friday, August 24, 2018 - 6:36:46 PM
Long-term archiving on: : Thursday, September 13, 2018 - 1:26:53 PM

File

SCD_T_2010_0129_HOANG.pdf
Files produced by the author(s)

Identifiers

  • HAL Id : tel-01746393, version 1

Collections

Citation

Thê Cuong Hoàng. Caractérisation des supraconducteurs à haute température critique en vue d'application en électrotechnique. Autre. Université Henri Poincaré - Nancy 1, 2010. Français. ⟨NNT : 2010NAN10129⟩. ⟨tel-01746393⟩

Share

Metrics

Record views

44

Files downloads

90