Nested Tubular Shielding for High-Voltage Transformer Connections
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Solution Overview
Problem
Electrically conductive connections in transformers or choke coils face challenges in preventing voltage flashovers, particularly in the high-voltage range, due to inadequate electrostatic shielding.
Innovation Solution
A shielding device comprising a tubular electrode with inwardly bent ring elements and nested tubular barrier elements, providing effective insulation and shielding around the connecting element, adaptable to various geometric and electrostatic requirements through a modular design.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a simple shielding structure is used, then the device complexity is reduced, but the insulation effectiveness against high electrostatic field strengths deteriorates
Solution Approach 1:
The patent employs nested tubular barrier elements arranged concentrically around the electrode, with at least two nested ring elements around each end section. This nesting arrangement creates multiple insulating layers that effectively isolate high electrostatic field strengths without requiring a single complex structure, thereby resolving the contradiction between simplicity and effectiveness.
Solution Approach 2:
The ring elements protrude beyond the end sections of the electrode and are bent inward by 90 degrees, adding a dimensional aspect to the insulation. This three-dimensional configuration provides targeted insulation at the end sections where high electrostatic field strengths occur, enhancing reliability without significantly increasing overall structural complexity.
2Reliability
If the electrode is closed at both ends, then the insulation is improved, but the ease of insertion for the connecting element deteriorates
Solution Approach 1:
The electrode is designed as an open tubular structure segmented into distinct regions: the main tubular body and the end sections with bent ring elements. This segmentation allows the electrode to remain open for easy insertion of the connecting element while the bent ring elements provide the necessary insulation at the end sections, resolving the contradiction between openness for insertion and insulation quality.
3Reliability
If ring elements are added around end sections, then the insulation at end areas is improved, but the device complexity increases
Solution Approach 1:
The ring elements are integrated with the retaining rings that already serve to hold the barrier elements in place. The ring elements and retaining rings are arranged concentrically and fastened together, combining insulation and retention functions into a unified structure. This merging reduces the number of separate components while providing enhanced insulation at the end sections.
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 shielding device effectively isolates the connecting element from electrostatic field strengths, reducing the risk of voltage flashovers and ensuring reliable operation in high-voltage applications by enhancing insulation and adaptability.
Implementation Method 1
Electrically conductive connections to transformers or choke coils must be electrostatically shielded from the environment, especially in the high-voltage range, in order to prevent voltage flashovers in particular
Implementation Method 2
By bending over an edge area of the electrode, the electrostatic field strengths occurring there are advantageously reduced and the shielding effect of the electrode is thus improved
Data Source
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AI summary
The invention relates to a shielding device (9) for an electrically conductive connecting element. The shielding device (9) comprises a tubular electrode (10) open at both ends, through which the connecting element can be guided and whose outer surface is electrically insulated, and several nested tubular barrier elements (22 to 25) arranged concentrically around the electrode (10). At least two nested ring elements (16, 17, 19, 20) attached to a retaining ring (18, 21) are arranged concentrically around at least one end section (13, 14) of the electrode (10). These ring elements project beyond the respective end section (13, 14) of the electrode (10), and their portions projecting beyond the end section (13, 14) are each bent inwards by 90 degrees. The invention further relates to the use of such a shielding device (9) for a transformer or an inductor.