Microcapsule Electrical Insulation Against Electrical Treeing
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional epoxy composite materials are susceptible to rapid self-curing and fail to effectively mitigate electrical treeing, leading to inadequate resistance against defects in electrical insulation.
Innovation Solution
Incorporating microcapsules with a solid shell containing an electrically insulating liquid into the insulation material, which rupture upon electrical tree formation to release the liquid into treeing channels, thereby impeding further degradation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional epoxy composite materials are used, then the electrical insulation provides basic insulating properties, but it is susceptible to rapid self-curing and fails to effectively mitigate electrical treeing
Solution Approach 1:
The patent incorporates microcapsules containing curing agents or repair materials in advance within the electrical insulation material. When electrical treeing occurs, these pre-positioned capsules rupture and release their contents to seal the defects. This preliminary action allows the material to respond automatically to damage without requiring external intervention, thereby improving reliability against electrical treeing while maintaining relatively simple material composition.
Solution Approach 2:
The patent modifies the material parameters by incorporating microcapsules with specific size distributions, wall thicknesses, and curing agent concentrations. By adjusting these parameters, the material achieves optimal balance between maintaining basic insulating properties and providing effective self-healing capability against electrical treeing, thus improving reliability without excessive complexity.
2Reliability
If self-healing functionality is introduced using polymer capsules, then the material can repair defects, but it cures too rapidly and cannot flow into channels formed by electrical treeing
Solution Approach 1:
The patent carefully controls the curing speed by adjusting parameters such as capsule wall permeability, curing agent concentration, and activation energy. The capsules are designed to maintain structural integrity during normal operation but rupture or become permeable at specific thresholds, allowing controlled release of curing agents at appropriate speeds to fill treeing channels effectively, thus achieving high defect tolerance without excessive curing speed.
Solution Approach 2:
The patent incorporates capsules containing curing agents or repair materials in advance within the electrical insulation material. When electrical treeing occurs, these pre-positioned capsules rupture and release their contents to seal the defects. This preliminary action allows the material to respond automatically to damage without requiring external intervention, thereby improving reliability against electrical treeing while maintaining relatively simple material composition.
3Reliability
If microcapsules with solid shell containing electrically insulating liquid are incorporated, then the electrical insulation provides enhanced robustness against electrical tree growth, but the device complexity increases
Solution Approach 1:
The patent creates a composite material system by integrating microcapsules containing electrically insulating liquid into the base electrical insulation material. This composite structure combines the properties of the base material with the self-healing capabilities of the capsules, achieving enhanced robustness against electrical tree growth. The composite approach allows maintaining relatively simple overall structure while incorporating advanced functionality through the capsule integration.
Solution Approach 2:
The patent utilizes the porous or cavity-containing structure of microcapsules to embed electrically insulating liquid within the solid shell. This porous material approach allows the capsules to maintain structural integrity while containing the liquid repair material, enabling automatic injection into electrical tree channels when the shell ruptures, thus improving reliability without excessive complexity in capsule integration.
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 electrical insulation exhibits enhanced robustness against electrical tree growth, extending the time to breakdown and preventing further damage.
Implementation Method 1
the insulating liquid from the capsule to flow into treeing channels
Implementation Method 2
the electrical tree eventually hits one of the capsules, punctures it
Data Source
Figure 1~2
Figure 3~5
Figure 6~7
AI summary
An electrical insulation (20) comprises an electrically insulating material (21) and an electrical tree inhibiting material in the electrically insulating material (21). The electrical tree inhibiting material comprising a plurality of capsules (30) having a shell and an electrically insulating liquid within the shell.