Abstract
High-temperature superconducting (HTS) bulks can be used in electrical applications. Experimental characterization of large-size HTS bulks is a tricky issue. The relevant parameters for their application were directly measured in this study. This paper has three main aims. Firstly, features of YBaCuO bulks are presented. Secondly, an electrical motor application is developed using magnetic field shielding and trapping. Thirdly, the HTS bulks are characterized. Several classical methods were used, which are mainly magnetic methods only available for small samples. The complete penetration magnetic field and the critical current density were found to be the main parameters relevant for applications. An innovative entire HTS bulk characterization method is presented. This characterization method is useful for end users and engineers to better implement HTS bulks.
Highlights
High-Temperature SuperconductorHigh-temperature superconducting (HTS) bulks can be used in electrical applications as magnets or magnetic shields
The main issue with these characterization methods is that there are valid only for small samples cut into entire HTS bulks
In the last few l years, we proposed a new direct magnetic determination method for JC and n-value of 12 a dedu consists of the determination of the complete penetration magnetic field BP2 and tion of the critical current density JC
Summary
High-temperature superconducting (HTS) bulks can be used in electrical applications as magnets or magnetic shields. The main issue with these characterization methods is that there are valid only for small samples cut into entire HTS bulks. This is sufficient for material scientists and it allows comparing HTS materials, but it is not useful for applications. In the last few l years, we proposed a new direct magnetic determination method for JC and n-value of 12 a dedu consists of the determination of the complete penetration magnetic field BP2 and tion of the critical current density JC. The relevant such as the completeispenetration magnetic field, for applications should be directly measured.
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