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8-shaped magnetic flux density amplifying device of superconducting closed loop

A closed-loop, magnetic flux density technology, applied in the use of superconducting devices to measure the magnetic field, the size/direction of the magnetic field, etc., can solve the problems of being easily interfered by other magnetic fields, the measurement technology is also very demanding, and the magnetic field cannot be amplified. , to achieve the effect of convenient production process, simple raw materials, and magnifying magnetic induction intensity

Pending Publication Date: 2022-05-10
NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, the commonly used device for measuring the magnetic field is the Hall element. Although this device can accurately measure the magnetic flux density in the space, it cannot amplify the magnetic field, has poor anti-interference ability, and has high requirements for measurement technology. Interference from other magnetic fields, thus affecting the measurement results

Method used

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  • 8-shaped magnetic flux density amplifying device of superconducting closed loop
  • 8-shaped magnetic flux density amplifying device of superconducting closed loop
  • 8-shaped magnetic flux density amplifying device of superconducting closed loop

Examples

Experimental program
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specific Embodiment approach

[0040] First, a uniform and constant magnetic field B perpendicular to the loop is applied to the ring 1 (namely 301, hereinafter referred to as ring 1) of the "8"-shaped magnetic flux density amplifier device. 0 , and then in the magnetic field B 0 The device in is placed in a coolant to cool it to a superconducting state. At this time, the total magnetic flux passing through the ring 1 is Φ.

[0041] After sufficient cooling to make the superconducting closed loop enter the superconducting state, the uniform and constant magnetic field B 0 remove. Based on the principle of conservation of magnetic flux in a superconducting closed loop, an induced current (set as I 1 ). The magnetic field generated by this current (set as B 1) makes the total magnetic flux of ring 1 still Φ, thus ensuring the conservation of magnetic flux. Because ring 1 and ring 2 (i.e. 302, hereinafter referred to as ring 2) are connected in this "8" type closed loop, so there will be an electric curre...

Embodiment approach

[0042] Since the superconducting closed loop is cooled with a magnetic field under the field cooling implementation mode, the magnetic flux density in the loop is the same as the magnetic field B before the loop enters the superconducting state 0 Related, so field cooling is only suitable for amplifying a constant magnetic field.

[0043] The specific cold implementation method of the zero field:

[0044] First place this "8"-shaped magnetic flux density amplifier in a coolant to ensure that it is reliably cooled to a superconducting state. Then apply the magnetic field that needs to be amplified to the ring 1. In this example, a uniform magnetic field B perpendicular to the loop is applied to the ring 1. 0 . Based on the principle of magnetic flux conservation of superconducting devices, an opposite magnetic field will be generated in ring 1 (set as B 1 ) to offset B 0 The magnetic flux is generated on this ring to maintain the total magnetic flux in ring 1 to be zero. S...

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Abstract

The invention discloses an 8-shaped magnetic flux density amplifying device of a superconducting closed loop. The device is formed by cutting a single superconducting strip and then bending around a specific node. Based on the magnetic flux conservation principle of a superconducting closed loop, an amplifying device with a function of amplifying the magnetic flux density in a space is manufactured, and the amplification factor is related to the ratio of the radiuses of two circular rings. The specific implementation method of the magnetic flux density amplifying device has field cooling and zero field cooling, the former is suitable for a constant magnetic field, and the latter is suitable for a constant magnetic field and an alternating magnetic field. The device is manufactured without any welding, and belongs to a full-superconducting closed loop. According to the invention, resistance-free operation can be realized at a low temperature, the magnetic flux density in a space is amplified, and the anti-interference capability when a weak magnetic field is measured is improved. The device has the advantages of simple structure, no need of an external power supply, stable operation, adjustable amplification factor and the like.

Description

technical field [0001] The invention relates to the field of superconducting engineering technology, and belongs to the application of superconducting magnets, in particular to the principle, manufacturing process and application of a "8"-shaped magnetic flux density amplifier of a superconducting closed circuit. Background technique [0002] Superconducting materials have unique electromagnetic properties such as zero resistance and diamagnetism at low temperatures. Therefore, substituting superconducting materials for conventional materials will bring about a qualitative leap in many fields. With the development of the second-generation high-temperature superconducting tape-ReBCO (Re is Y, Gd and other rare earth elements) coated conductors, the cost of superconducting applications has been greatly reduced, making the wide application of superconducting tapes possible. The coated conductor has excellent strong magnetic field performance, and has a high critical current at...

Claims

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Application Information

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IPC IPC(8): G01R33/035
CPCG01R33/035
Inventor 黄正浩王银顺皮伟张广毅陈宇恒
Owner NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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