Planar Bifilar Superconducting Conductor Arrangement for Short-Circuit Limiters
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Superconducting short-circuit current limiters with bifilar coils face issues with high inductance, alternating field losses, and poor space utilization due to large separations required for withstand voltage, especially at high voltages, which increase costs and operational inefficiencies.
Innovation Solution
A conductor arrangement featuring bifilar superconducting conductor ribbons arranged in a spiral on a common plane with short separations and parallel connections, utilizing spacers for insulation and allowing coolant accessibility, which minimizes inductance, alternating field losses, and maintains high withstand voltage, enabling a compact design.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If bifilar coils are used with large separations between conductor parts to ensure withstand voltage, then the insulation and safety are improved, but the inductance increases and space utilization deteriorates
Solution Approach 1:
The patent transitions from traditional three-dimensional stacked coil arrangements to a planar two-dimensional configuration where multiple bifilar conductor assemblies are arranged side-by-side on a common plane. This dimensional change allows for compact spacing while maintaining electrical insulation through the planar layout, thereby improving space utilization without compromising withstand voltage capability.
Solution Approach 2:
Multiple bifilar conductor assemblies are combined and arranged adjacently on a common plane to form a unified coil structure. This merging approach allows the assemblies to share the same spatial plane, reducing the overall volume required compared to stacked arrangements, while the insulating layers between adjacent assemblies maintain the necessary electrical isolation for high voltage operation.
2Reliability
If bifilar coils are used with large separations between conductor parts, then the insulation is improved, but the inductance increases
Solution Approach 1:
The patent employs a planar arrangement of bifilar conductor assemblies on a common plane, reducing the separation distance between conductor parts in the vertical dimension while maintaining adequate insulation through the two-dimensional layout. This significantly reduces the inductance of the coil structure compared to traditional stacked configurations with large vertical separations.
Solution Approach 2:
The patent changes the geometric parameters of the coil structure by transitioning from large vertical separations to small planar separations between adjacent bifilar assemblies. This parameter change reduces the inductance while the insulating layers maintain the necessary electrical isolation, thereby reducing energy losses without compromising insulation.
3Reliability
If bifilar coils are used with large separations between conductor parts, then the insulation is improved, but alternating field losses increase
Solution Approach 1:
The planar arrangement of bifilar conductor assemblies on a common plane reduces the distance between adjacent conductors from the vertical dimension to the horizontal dimension. This dimensional change decreases the alternating field losses by minimizing the magnetic path length while the insulating layers between assemblies maintain adequate electrical insulation for high voltage operation.
4Volume of moving object
If compact design is implemented with short separations between conductor parts, then space utilization is improved, but withstand voltage capability deteriorates
Solution Approach 1:
Multiple bifilar conductor assemblies are merged and arranged adjacently on a common plane, allowing them to occupy compact space while the insulating layers between adjacent assemblies maintain the necessary electrical isolation. This combining approach achieves both compact design and adequate withstand voltage capability.
Solution Approach 2:
Insulating layers are introduced as intermediary elements between adjacent bifilar conductor assemblies arranged on a common plane. These intermediaries enable short separations between conductor parts for compact design while maintaining the necessary electrical insulation for high voltage operation, thereby resolving the contradiction between compactness and withstand voltage capability.
5Device complexity
If traditional bifilar coil design is used, then the structure is simple, but coolant accessibility to conductor ribbons deteriorates
Solution Approach 1:
The planar arrangement of bifilar conductor assemblies on a common plane opens up the structure in the vertical dimension, allowing coolant to flow more effectively between and around the assemblies. This dimensional change improves coolant accessibility for efficient heat removal while maintaining relatively simple structural construction.
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 arrangement effectively limits short-circuit currents with minimal losses, optimizing space utilization and reducing refrigeration needs, while ensuring high withstand voltage and rapid cooling, thus enhancing the operational efficiency and cost-effectiveness of short-circuit current limiters.
Implementation Method 1
Because of the superconduction, these have no power losses, or only very minor power losses, in operation
Implementation Method 2
The superconducting arrangement which is connected in series in the power supply system switches a resistance to the power supply system very quickly as a result of this change
Implementation Method 3
The at least one first and the at least one second conductor assembly are formed on a common plane, running adjacent to one another, and are insulated from one another to form a common coil winding, the turns of which run largely in the form of a spiral
Implementation Method 4
allowing coolant accessibility
Data Source
AI summary
A conductor arrangement for a resistive switching element, has at least first and second conductor connections disposed in a mutual plane adjacent to each other and insulated against each other. The composite conductors each have two conductor parts extending parallel, and forming a bifilar construction. The conductor parts are constructed from at least one superconducting conductor band. The composite conductors are formed into a coil winding, wherein the windings thereof substantially extend in the manner of a spiral, and are insulated against each other by a spacer.