Superconducting Coil Iron Core Layout for Smaller Cryogenic Enclosures
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Solution Overview
Problem
Conventional magnetic field generating devices using superconducting coils require large vacuum heat-insulation containers due to the need for cooling, which increases size and cost.
Innovation Solution
The device comprises a C-shaped or U-shaped iron core divided into split iron core portions with superconducting coils wound around them, housed in separate vacuum heat-insulation containers, and a yoke located outside, reducing the size of the containers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If the entire iron core and pair of coils are stored in a vacuum heat-insulation container for cooling, then the superconducting coils can be cooled, but the vacuum heat-insulation container requires a large size
Solution Approach 1:
The iron core is divided into a yoke portion and a pair of split iron core portions. The split iron core portions with coils are stored in vacuum heat-insulation containers, while the yoke portion is located outside the containers. This segmentation allows only the necessary components to be cooled, reducing the container size.
Solution Approach 2:
The yoke portion is extracted from the cooling system and placed outside the vacuum heat-insulation containers. Only the split iron core portions with superconducting coils require cooling, so they are the only components stored inside the containers. This extraction reduces the volume of the containers.
2Power
If superconducting coils are used, then stronger magnetic fields can be generated, but the need for cooling increases the device size and cost
Solution Approach 1:
The device is segmented such that only the split iron core portions with superconducting coils are cooled in vacuum containers, while the yoke operates at ambient temperature. This reduces the overall device footprint while maintaining strong magnetic field generation capability where needed.
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 minimizes the size of vacuum heat-insulation containers, reduces superconductor usage and cost, and enhances cooling efficiency by direct contact between the iron core and coils, allowing for stronger magnetic fields and reduced energy consumption.
Implementation Method 1
a pair of superconducting coils; each of the pair of superconducting coils is wound around a different one of the pair of split iron core portions
Implementation Method 2
a pair of vacuum heat-insulation containers; the split iron core portions with the superconducting coils wound around the split iron core portions are stored in the one or pair of vacuum heat-insulation containers
Data Source
AI summary
A magnetic field generating device 1 comprises: an iron core 2; a pair of superconducting coils 3; and one or a pair of vacuum heat-insulation containers 4, wherein the iron core includes: a yoke 21; and a pair of split iron core portions 22 that are formed separately from the yoke, are located inside the yoke, and face each other with a work space therebetween, each of the pair of superconducting coils is wound around a different one of the pair of split iron core portions in a circumferential direction about an axis that is parallel to a direction in which the pair of split iron core portions face each other, a pair of split iron core coil assemblies 5 are stored in the one or pair of vacuum heat-insulation containers, and the yoke is located outside the one or pair of vacuum heat-insulation containers.