High-Voltage Device Control Insert Shielding
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Solution Overview
Problem
High-voltage devices often suffer from inhomogeneous field distribution due to manufacturing irregularities in the inner conductor, leading to reduced functionality, particularly at the interface between the inner conductor and control inserts.
Innovation Solution
An additional conductive connection is established between the inner conductor and a second control insert that extends axially to the foot end of the high-voltage device, creating a shielding effect to improve field uniformity, with the second control insert being electrically connected to the inner conductor and positioned to enclose parts like the foot fitting or plug-in connections within the insulating body.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the inner conductor is manufactured with standard precision, then manufacturing cost and complexity are reduced, but field distribution uniformity deteriorates due to surface irregularities and non-cylindrical symmetry
Solution Approach 1:
The patent applies local quality by introducing control inserts with specific electrical properties at critical locations where field uniformity is compromised. These inserts are positioned between the inner conductor and insulating body to locally correct field distortions caused by manufacturing imperfections, rather than requiring perfect precision throughout the entire inner conductor.
Solution Approach 2:
The control inserts act as intermediary elements between the inner conductor and the insulating body. They mediate the electrical field distribution by providing controlled capacitance and conductivity pathways that compensate for irregularities in the inner conductor geometry, thereby improving overall field uniformity without requiring higher manufacturing precision.
2Reliability
If control inserts are added to improve field distribution, then field uniformity is improved, but device complexity increases
Solution Approach 1:
The patent implements partial action by placing control inserts only at specific axial positions where field distortion is most critical, rather than uniformly distributing them along the entire length of the inner conductor. This selective placement achieves sufficient field correction with fewer inserts, thereby limiting the increase in device complexity.
Solution Approach 2:
The control inserts are segmented into discrete units positioned at different axial locations, each addressing local field distribution issues. This segmentation allows the system to achieve overall field uniformity through multiple small corrections rather than requiring a single complex solution, making the system more manageable and less complex.
3Reliability
If the second control insert extends beyond the first control insert to provide shielding at the foot end, then field uniformity at the foot end is improved, but the insulating body structure becomes more complex
Solution Approach 1:
The patent extends the second control insert in the axial dimension beyond the first control insert, creating a stepped configuration. This dimensional extension provides shielding coverage at the foot end without requiring radial expansion or additional complex structural elements, thereby improving field uniformity with a relatively simple structural modification.
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 enhances the uniformity of the electrical field distribution, particularly at the foot end, reducing disruptive irregularities and preventing partial discharges, while avoiding the need for soldering and ensuring a reliable, simple connection.
Implementation Method 1
the second control insert can develop a shielding effect with respect to a part of the high-voltage device that is not surrounded by the first control insert
Implementation Method 2
an insulating body surrounding the inner conductor along its longitudinal direction
Data Source
Figure 1
AI summary
The invention relates to a high-voltage device (1), comprising an inner conductor (2), an insulating body (6), which surrounds the inner conductor along the longitudinal direction of the inner conductor and which comprises electrically conductive control inserts (7-9) for field control, which are arranged concentrically around the inner conductor and are spaced apart from each other by insulating layers, and an electrically conductive connection between the inner conductor and a first control insert (7) closest to the inner conductor. The invention is characterized by an electrically conductive connection between the inner conductor and a second control insert (8), which axially extends beyond the first control insert to a foot end (12) of the high-voltage device.