Twisted type superconducting tape critical current detection device

Abstract

The invention relates to a twisted type superconducting tape critical current detection device. The device comprises a test unit and a cryogenic unit; the cryogenic unit comprises a cooling medium storage container and a cryogenic Dewar; the cryogenic Dewar comprises a cryogenic Dewar shell and a Cryogenic Dewar flange located at the top end of the shell; the cryogenic Dewar flange is provided with a copper current lead which vertically passes through the cryogenic Dewar flange and a rotating handle on the upper surface of the cryogenic Dewar flange; the test unit includes a signal connector which is connected with a data acquisition control system, and a rotary contact type current lead unit which is connected with the copper current lead through a wire; and a bracket, background magneticfield magnets, a superconducting tape twisting unit and fastening portions are arranged in the cryogenic Dewar shell, wherein the bracket is formed by horizontal bracket components and vertical bracket components, the background magnetic field magnets are arranged between the horizontal bracket components and the vertical bracket components, and the fastening portions are provided with springs. The detection device of the invention has the advantages of complete functions, convenient and quick use, high efficiency and high precision. With the twisted type superconducting tape critical currentdetection device, different torsional intercepts can be obtained, and the critical current characteristics of a single or plurality of twisted superconducting tapes under different temperatures and different magnetic field magnitudes can be measured.

Description

technical field [0001] The invention relates to a critical current detection device for a superconducting strip, in particular to a critical current detection device for a single or multiple parallel superconducting strips under different torsion intercepts. Background technique [0002] In recent years, with the continuous improvement of high-temperature superconducting material preparation technology, a series of superconducting materials with excellent performance have been manufactured. The critical current of a single superconducting strip under the self-field can approximately reach 100A, which is the basis for the application of superconducting technology. The foundations are laid for development. However, with the gradual increase in people's demand for large current-carrying power devices, the current carrying capacity of a single superconducting strip can no longer meet the needs of practical applications, and the simple parallel winding structure of multiple super...

AI Technical Summary

Problems solved by technology

However, with the gradual increase in people's demand for large current-carrying power devices, the current carrying capacity of a single superconducting strip can no longer meet the needs of practical applications, and the simple parallel winding structure of multiple superconducting strips will cause problems due to wire branches. The small leakage reactance between the circuits causes a large circulating current, increases the AC loss, and leads to uneven distribution of the magnetic field, thereby reducing the critical current of the superconducting strip, so the superconducting compound with good superconducting properties such as high current carrying capacity and low AC loss Tape is the future development trend, and the measurement of the critical current of composite superconductors is the basic experimental support for studying its current-carrying properties

Images