Helical Cylindrical Resistor Structure for High-Voltage Field Reduction
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Solution Overview
Problem
High voltage resistor structures and voltage divider arrangements face challenges in manufacturing, reliability, and safety due to excessive electric stresses, which can lead to dielectric failures such as partial discharge or electrical breakdown.
Innovation Solution
The resistor structure features a cylindrical electrically insulating substrate with helically running resistive paths, optimized geometry to reduce electric field intensity, and specific terminal connections to minimize electric stress, thereby enhancing safety and reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If high voltage applications use conventional resistor structures, then high resistance is achieved to limit power dissipation, but excessive electric field intensity causes dielectric failures
Solution Approach 1:
The patent applies curvature by using a cylindrical substrate and helical resistive paths instead of straight lines. The helical configuration distributes the electric field more uniformly along the curved path, avoiding concentration at sharp corners or straight edges, thereby reducing maximum field intensity and preventing dielectric breakdown
Solution Approach 2:
The patent transitions from a planar resistive path to a three-dimensional helical configuration wrapped around a cylindrical substrate. This dimensional change allows the electric field to be distributed throughout the volume of the cylinder rather than confined to a flat plane, reducing field intensity through spatial distribution
2Ease of manufacture
If resistor structures use sharp corners or abrupt geometries, then manufacturing is simplified, but electric field concentration increases causing partial discharge
Solution Approach 1:
The patent replaces sharp corners and abrupt geometries with continuous curved helical paths on a cylindrical surface. This curvature eliminates field concentration points while maintaining manufacturability through standard cylindrical fabrication processes and helical winding techniques
3Device complexity
If resistor structures use straight resistive paths, then the structure is simple, but electric field distribution is non-uniform causing breakdown
Solution Approach 1:
The patent uses helical curves instead of straight paths, creating a more uniform distribution of electric field intensity along the resistive path. The continuous curvature of the helix ensures even field distribution while adding only moderate complexity to the structure
Solution Approach 2:
By wrapping the resistive path in a helical configuration around a cylinder, the patent achieves uniform electric field distribution through three-dimensional spatial arrangement. This dimensional transition from 2D plane to 3D volume provides better field management with acceptable structural complexity
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 solution effectively reduces electric field intensity and stress, preventing dielectric failures and improving the accuracy and voltage withstand of resistor structures and voltage divider arrangements.
Implementation Method 1
an intensity of the electrical field is at least in parts reduced
Implementation Method 2
the resistive path running helically at least partially along the cylindrical substrate
Data Source
AI summary
A resistor structure includes at least an electrically insulating substrate in a cylindrical form, at least one electrically conductive terminal directly or indirectly provided on the substrate, at least one resistive path directly or indirectly and at least partially provided on the substrate and directly or indirectly joined to the terminal, the resistive path running helically at least partially along the cylindrical form of the substrate and comprising at least one resistive trace, wherein the geometry in connection with the resistive path is configured such that an intensity of the electrical field is at least in parts reduced.