Superconducting Bulk Cavity Structure for Higher Torque Density
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Solution Overview
Problem
Current superconducting electric machines, particularly those with circular bulk forms, do not effectively maximize torque density or minimize weight, which are critical dimensions in aerial transport applications seeking to reduce fuel consumption and noise.
Innovation Solution
The design of a superconducting bulk with a circumferential wall and supplementary walls that create a cavity, allowing for optimized magnetic field modulation and reduced mass, enhancing torque density and power while minimizing weight.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If circular superconducting bulks are used, then manufacturing is simplified, but torque density and weight optimization are not achieved
Solution Approach 1:
The patent applies asymmetry by transitioning from circular to non-circular (rectangular, square, or polygonal) superconducting bulk geometries. This shape change optimizes the magnetic field distribution and increases torque density while maintaining manufacturing feasibility through adapted production processes for non-circular forms.
Solution Approach 2:
The patent introduces dimensional optimization by carefully controlling the thickness dimension of the superconducting bulks relative to their other dimensions. By optimizing the thickness-to-dimension ratio, the design achieves better torque density and weight optimization while maintaining structural integrity and magnetic field effectiveness.
2Weight of moving object
If superconducting bulk mass is reduced, then weight decreases, but magnetic field modulation capability may be compromised
Solution Approach 1:
The patent applies parameter changes by optimizing the thickness dimension of the superconducting bulks. By carefully selecting the thickness parameter within specific ranges relative to the bulk dimensions, the design reduces mass while maintaining adequate magnetic field modulation capability through enhanced field concentration effects in the optimized geometry.
Solution Approach 2:
The patent employs composite construction by combining superconducting materials with non-magnetic structural materials in a layered or integrated configuration. This allows reduction of superconducting material mass while maintaining magnetic field modulation through the composite structure's optimized magnetic properties.
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
The proposed design increases magnetic field variation by 30% and reduces mass, enabling higher rotor speed and improved engine power, while maintaining effective screening and mechanical resistance.
Implementation Method 1
Several phenomena result from this, such as the diamagnetic response for any variation in the magnetic field, providing excellent magnetic shielding.
Implementation Method 2
The inductor comprises an HTC coil made with HTC wire which generates a magnetic field modulated by superconducting bulks which constitute magnetic screens.
Implementation Method 3
The rotation of screens varies the magnetic field and armature, and by way of the Lenz law causes an electromotive force in the winding.
Implementation Method 4
Superconducting material is material which, when cooled to a temperature below its critical temperature, exhibits zero resistivity in offering the possibility of having continuous lossless current circulate.
Data Source
AI summary
The present invention relates to a superconducting pellet for a superconducting electrical machine, the superconducting pellet having a circumferential wall, the circumferential wall having: a first border, a second border opposite the first border, an inner face connecting the first border to the second border, an outer face opposite the inner face, and a cavity formed between the first border and the second border and defined by the inner face, and an additional wall which covers the first border or is flush with the first border so as to at least partially cover the cavity, or extends from the inner face at a distance from the first border and the second border so as to divide the cavity into two portions.