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Method and apparatus for measuring critical current uniformity of practical length YBCO high-temperature superconductive material

A high-temperature superconducting tape, critical current technology, applied in measuring devices, measuring current/voltage, measuring electrical variables, etc., can solve the problems of slow measurement speed and low accuracy

Inactive Publication Date: 2011-05-18
INST OF ELECTRICAL ENG CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0011] The purpose of the present invention is to overcome the disadvantages of slow measurement speed and low precision in the prior art, and provide a simple, fast, low-cost, high-precision non-contact measurement method and device suitable for the second generation of YBCO high temperature superconducting strip critical current

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  • Method and apparatus for measuring critical current uniformity of practical length YBCO high-temperature superconductive material
  • Method and apparatus for measuring critical current uniformity of practical length YBCO high-temperature superconductive material
  • Method and apparatus for measuring critical current uniformity of practical length YBCO high-temperature superconductive material

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Embodiment Construction

[0031] Such as Figure 4 As shown, the device applying the method of the present invention includes a DC magnet 1 with an iron core, a Hall probe (array) 2, a superconducting tape material 3, a stepping motor 4, a pay-off reel 5, a take-up reel 6, and a take-up set Pulley 7, pay-off fixed pulley 8, cryogenic cooling medium 9, cryogenic container 10, digital voltmeter 11, magnet DC power supply 12, system control, data acquisition and processing system 13. The magnet DC power supply 12 is used to drive the stepping motor 4 of the take-up reel, the take-up reel 5, the take-up reel 6, the digital voltmeter 11, and the system control, data acquisition and processing system 13 is placed in a room temperature environment. The magnet DC power supply 12 is directly connected to the DC magnet 1 with an iron core "wedge"; the digital voltmeter 11 is connected to the Hall probe (array) 2 to measure the output voltage of the Hall probe. The stepping motor 4 drives the pay-off reel 5, so th...

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Abstract

The invention discloses a practical length of YBCO superconducting material critical current uniformity of measurement method. Its feature lies in YBCO superconducting material is placed in the magnetic field gradient of the magnetic field. DC magnet [1] sets in sharp suits with air gap cores. The sharp suits have a uniform gap within the magnetic field gradient. Magnetic field is perpendicular to the direction of YBCO superconducting tapes surface. When the YBCO superconducting tapes uniform adoption of the wedge, cutting magnetic line of force, in its superconducting layer swirl is generated. Swirl in superconductive material surface generates a constant magnetic field. Swirl in the superconducting layer is of proportional with the eddy current in the superconductive material, and also with the magnetic field which the Hall probe detects. After calibration, Hall probe [2] output signal is the superconducting critical current local band along the length o the critical current distribution. Application of this method invented devices includes belt ''wedge'' air gap cores magnet [1], Hall probe [2], retracting fixed pulley [7], and releasing fixed pulley [8], stepper motor [4], DC Power [12], Low-temperature devices [10], and other components.

Description

technical field [0001] The invention relates to a method and a device for the critical current uniformity of a high-temperature superconducting strip, in particular to a non-contact measuring method and a device for the local critical current uniformity of a practical length YBCO superconducting strip. Background technique [0002] At present, the second-generation high-temperature superconducting (HTS) Y-series superconducting materials are being produced internationally by spraying technology. Compared with the first-generation Bi-series HTS strips, the second-generation Y-series (YBCO) superconducting strips are much simpler in terms of production process and cost. In the liquid nitrogen temperature region, the anisotropy of its superconductivity is relatively weak, and it has a better current-carrying capacity than Bi-based high-temperature superconducting materials under a higher magnetic field near the liquid nitrogen temperature region. The electromagnetic and mechan...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R33/12G01R19/00G01N27/00
Inventor 王银顺戴少涛惠东肖立业林良真
Owner INST OF ELECTRICAL ENG CHINESE ACAD OF SCI