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A high-temperature superconducting coil shielding current elimination device

A technology of shielding current and high-temperature superconductivity, applied in superconducting magnets/coils, circuits, electrical components, etc., can solve the problems of slow changes in shielding current, affecting the magnetic field stability of high-temperature superconducting magnets, and deteriorating the uniformity of the magnetic field.

Active Publication Date: 2021-07-27
INST OF ELECTRICAL ENG CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The generation of shielding current leads to uneven distribution of conduction current inside the high-temperature superconducting strip, which seriously affects the distribution of the magnetic field in the homogeneous region of the high-temperature superconducting magnet, and deteriorates the uniformity of the magnetic field
Due to the influence of flux creep, the shielding current will change slowly over time, resulting in the phenomenon of magnetic field drift, which directly affects the stability of the magnetic field of high-temperature superconducting magnets. MRI equipment application presents challenges

Method used

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  • A high-temperature superconducting coil shielding current elimination device
  • A high-temperature superconducting coil shielding current elimination device
  • A high-temperature superconducting coil shielding current elimination device

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Embodiment Construction

[0016] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0017] Such as Figure 1-Figure 5 As shown, the embodiment of the present invention consists of a skeleton 1, a high temperature superconducting strip 3, a stainless steel strip 5, a first terminal 2, a second terminal 4, a third terminal 6, a cold head 7, an AC power supply 8 and a DC The power supply 9 is composed.

[0018] The skeleton 1 is located at the bottom of the entire device, the surface of the high-temperature superconducting strip 3 and the stainless steel strip 5 are not wrapped with insulating materials, and are wound side by side on the skeleton 1, the stainless steel strip is located on the outside, and the high-temperature superconducting strip is located on the inside. The inner side of the frame 1 is provided with a groove for installing the third terminal post 6 . There are round holes on the outer side of the skeleton 1...

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Abstract

A high-temperature superconducting coil shielding current elimination device is composed of a skeleton, a cold head, a high-temperature superconducting strip, a stainless steel strip, a terminal, an AC power supply and a DC power supply. High-temperature superconducting strips and stainless steel strips are not wrapped with insulating materials on the surface, but are wound side by side on the skeleton. There are grooves on the inner side of the frame to install terminal posts, and round holes are opened on the outside of the frame to install terminal posts and cold heads respectively. The inner side of the high-temperature superconducting strip and the stainless steel strip share a terminal, and the outside is connected to an independent terminal. The high-temperature superconducting strip is connected to a DC power supply to generate a static magnetic field in the central area of ​​the coil. The stainless steel strip is connected to an AC power supply to provide high-temperature superconducting The current flowing between the layers of the strip and the stainless steel strip causes heating of the interlayer resistance, thereby reducing the critical current in the high-temperature superconducting coil and further eliminating the influence of the shielding current.

Description

technical field [0001] The invention relates to a shielding current eliminating device, in particular to a high temperature superconducting coil shielding current eliminating device. Background technique [0002] In recent years, superconducting magnets have been widely used in many fields such as national economy and scientific research. Compared with traditional low-temperature superconducting wires, high-temperature superconducting tapes, such as commercial Bi-2223 and REBCO tapes, have higher critical temperature, critical magnetic field and mechanical strength, and have been highly valued by researchers since their birth. The working characteristics are continuously improved. Due to its excellent current-carrying performance and higher operating temperature range, high-temperature superconducting magnets play an irreplaceable role in many fields, such as space strong magnetic field applications, extremely high-field superconducting magnetic resonance spectrometers, con...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01F6/00H01F6/06
CPCH01F6/00H01F6/06H01F6/065H01F2006/001
Inventor 王磊王秋良刘建华秦朗王康帅
Owner INST OF ELECTRICAL ENG CHINESE ACAD OF SCI
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