Segmented Superconducting Bulk Magnet with Reinforcing Frames
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Solution Overview
Problem
Existing oxide superconducting bulk magnets face breakage under strong magnetic fields due to electromagnetic stress, and combining multiple bulk materials to generate a large magnetic field is challenging as individual materials are not adequately reinforced, leading to insufficient magnetic flux and breakage.
Innovation Solution
The solution involves fitting metal reinforcing frames over individual oxide superconducting bulk materials and combining them with assembly side, top, and bottom reinforcing members to form an integral unit, where the reinforcing members are strategically chosen for their strength and thermal conductivity to absorb stress and maintain magnetic field strength.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If a single oxide superconducting bulk material is used to generate strong magnetic field, then magnetic field strength is improved, but the material breaks due to electromagnetic stress
Solution Approach 1:
The invention divides a single large superconducting bulk material into multiple smaller bulk materials (first, second, and third bulk materials) arranged in parallel. This segmentation reduces the electromagnetic stress on each individual material while maintaining the overall magnetic field generation capability through the combined effect of multiple units.
Solution Approach 2:
The invention creates a composite structure by combining multiple oxide superconducting bulk materials with different orientations (first bulk material with c-axis perpendicular to ab-plane, second and third bulk materials with c-axis parallel to ab-plane) and integrating them with reinforcing structures. This composite approach allows the system to generate strong magnetic fields while the diverse material orientations and supporting structures distribute and reduce electromagnetic stress on individual components.
2Area of stationary object
If multiple oxide superconducting bulk materials are combined to generate large area magnetic field, then magnetic field coverage area is improved, but individual materials are not adequately reinforced leading to breakage
Solution Approach 1:
The invention segments the magnetic field generation system into multiple independent bulk materials arranged in parallel, allowing each material to contribute to the overall magnetic field coverage area while maintaining structural independence. This segmentation enables scalable expansion of magnetic field coverage without proportionally increasing the stress on each individual material.
Solution Approach 2:
The invention creates a composite structure integrating multiple bulk materials with different crystal orientations and reinforcing elements. The first bulk material has c-axis perpendicular to the ab-plane while the second and third bulk materials have c-axis parallel to the ab-plane, forming a composite arrangement that enhances both magnetic field coverage and structural reliability through distributed stress management.
3Reliability
If oxide superconducting bulk material is cooled in magnetic field to achieve superconductivity, then critical current density is improved, but electromagnetic stress increases causing material breakage
Solution Approach 1:
The invention divides the superconducting system into multiple smaller bulk materials cooled and magnetized simultaneously or sequentially. By segmenting the system, each individual material experiences reduced electromagnetic stress during the cooling and magnetization process, while the collective arrangement maintains high critical current density through the combined superconducting effect of all materials.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This configuration effectively prevents breakage of superconducting bulk materials under high magnetic fields, ensuring a strong and uniform magnetic field distribution, suitable for applications like marine motors and windpower generators.
Implementation Method 1
An oxide superconducting material comprising a single-crystal formed REBa 2 Cu 3 O 7-x (RE means rare earth element) phase in which a RE 2 BaCuO 5 phase is dispersed has a high critical current density
Implementation Method 2
at the time of cooling, a compressive stress due to the metal ring is applied to the oxide superconducting bulk material. This compressive stress has the effect of reducing the electromagnetic stress, so it is possible to suppress breakage of the oxide superconducting bulk material
Implementation Method 3
an extremely strong magnetic field is sealed in the compact space, a large electromagnetic stress acts inside an oxide superconducting bulk material. This electromagnetic stress acts so that the sealed-in magnetic field spreads, so is also called 'hoop stress'
Data Source
Figure 1
Figure 2A~2B
Figure 3A~3B
AI summary
A superconducting bulk magnet comprising a plurality of superconducting bulk materials combined, in which breakage of superconducting bulk materials is prevented and a strong magnetic field can be generated, that is, a superconducting bulk magnet comprising a plurality of superconducting bulk materials, each comprising a single-crystal formed RE1Ba2Cu3Oy (RE is one or more elements selected from Y or rare earth elements, where 6.8≤y≤7.1) in which RE2BaCuO5 is dispersed and each provided with a top surface, a bottom surface, and side surfaces, combined together, in which superconducting bulk magnet, bulk material units, each comprising a superconducting bulk material and a bulk material reinforcing member arranged so as to cover a side surface of the same, are arranged facing the same direction and contacting each other to form an assembly, a side surface of the assembly is covered by an assembly side surface reinforcing member, a top surface and bottom surface of the assembly are respectively covered by an assembly top reinforcing member and an assembly bottom reinforcing member, and the assembly side surface reinforcing member, the assembly top reinforcing member, and the assembly bottom reinforcing member are joined into an integral unit, is provided.