Capacitor Insulation System with Concentration Gradient Additive
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Solution Overview
Problem
Conventional insulation systems for capacitors face challenges in maintaining high dielectric strength due to the migration of voltage stabilizing additives out of the dielectric film, especially at high temperatures, leading to reduced dielectric performance.
Innovation Solution
An insulation system is proposed where a dielectric fluid and dielectric film both contain a first voltage stabilizing additive, with the concentration in the fluid being greater than in the film, preventing additive migration and enhancing dielectric strength.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If voltage stabilizing additives are added to the dielectric film to improve dielectric strength, then dielectric performance is improved, but the additives migrate out of the film at high temperatures, reducing dielectric strength
Solution Approach 1:
The patent combines the dielectric film and dielectric fluid into a unified insulation system where both components contain voltage stabilizing additives. The dielectric fluid contains a first voltage stabilizing additive and the dielectric film contains a second voltage stabilizing additive, creating a synergistic system where the fluid compensates for additive migration from the film, maintaining stable dielectric strength at high temperatures.
2Reliability
If the dielectric film contains voltage stabilizing additives to prevent breakdown, then dielectric performance is improved, but the additives migrate into the dielectric fluid, depleting the film's protective capacity
Solution Approach 1:
The dielectric fluid serves a dual function: it acts as the insulating medium and simultaneously serves as a reservoir of voltage stabilizing additives. When additives migrate from the dielectric film, the fluid replenishes the system with additional additives, creating a self-sustaining system that maintains dielectric performance without external intervention.
3Stability of the object's composition
If high concentrations of voltage stabilizing additives are used in the dielectric film to ensure stability, then dielectric strength is improved, but manufacturing complexity increases due to precise concentration control requirements
Solution Approach 1:
The patent segments the voltage stabilizing additive function into two distinct components: the dielectric film contains a second voltage stabilizing additive for immediate protection, while the dielectric fluid contains a first voltage stabilizing additive as a reservoir. This segmentation allows each component to have optimized, manageable additive concentrations, simplifying manufacturing while ensuring overall system stability.
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 approach significantly increases and stabilizes the dielectric strength of the insulation system, as demonstrated by improved AC and DC breakdown probabilities under various electric fields.
Implementation Method 1
the first concentration is greater than the second concentration, preventing migration of voltage stabilizing additive from the dielectric film to the dielectric fluid
Data Source
AI summary
A capacitor insulation system is disclosed in the present application. The insulation system includes a dielectric fluid containing a first voltage stabilizing additive of a first concentration. The insulation system further includes a dielectric film containing the first voltage stabilizing additive of a second concentration and impregnated in the dielectric fluid. The first concentration is greater than the second concentration. The insulation system prepared according to the present disclosure can provide an increased and quite stable dielectric strength.