Shielded Transformer Housing for Electric Field Flattening
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing high-frequency transformers face issues with electric field concentration and partial discharge, leading to potential damage and increased size or cost, and lack effective solutions for integrating electric field flattening shields during manufacturing.
Innovation Solution
A transformer design featuring a housing with a semiconductive layer and shield unit, including a bushing shield member and housing shield member, which mitigates electric field concentration and partial discharge while ensuring design flexibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a separate electric field flattening shield is coupled to the core, then electric field concentration is alleviated, but device complexity increases due to additional coupling structures
Solution Approach 1:
The patent combines the electric field flattening shield with the insulating structure by integrating the shield as an embedded component within the insulating material. This merging eliminates the need for separate coupling structures while maintaining the electric field flattening function, thereby reducing device complexity.
Solution Approach 2:
The insulating structure serves as an intermediary that simultaneously provides electrical insulation and supports the electric field flattening shield. By using the insulating material as both the insulation medium and the mounting structure for the shield, the patent avoids additional coupling components.
2Reliability
If insulating oil is filled to achieve insulation, then electrical insulation is improved, but manufacturing complexity increases due to additional filling processes
Solution Approach 1:
The patent extracts the insulation function from the oil-filled approach and integrates it directly into the solid insulating structure. The insulating members are designed with built-in insulation capabilities, eliminating the need for separate oil filling processes while maintaining reliable electrical insulation.
Solution Approach 2:
The patent replaces the liquid-based insulation system (oil filling) with a solid insulating structure. This substitution eliminates the need for fluid handling, sealing, and filling processes, thereby simplifying manufacturing while providing reliable insulation.
3Reliability
If the insulating structure forms the outer shape of the transformer, then electrical insulation is enhanced, but volume of the transformer increases
Solution Approach 1:
The patent applies insulation locally at critical areas where electrical stress is highest, rather than using a uniform thick insulating structure throughout. The insulating members are strategically positioned to provide targeted insulation where needed, minimizing overall volume while maintaining insulation reliability.
Solution Approach 2:
The patent optimizes the spatial arrangement of insulating members by utilizing three-dimensional space efficiently. The insulating structures are configured to provide maximum insulation effectiveness with minimum volume occupation, using vertical and radial dimensions to reduce the horizontal footprint.
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 design effectively reduces electric field concentration and partial discharge, prevents member damage from external factors, and maintains insulation performance without increasing transformer size or cost.
Implementation Method 1
a semiconductive layer which is formed to have an area smaller than a predetermined ratio of an entire area of a surface surrounding the housing space
Implementation Method 2
shield unit which is accommodated in the housing space spaced apart from the first winding unit and is electrically connectable to ground
Data Source
Figure 1
Figure 2
Figure 3
AI summary
A transformer and a manufacturing method therefor are disclosed. A transformer according to an aspect of the present invention comprises: a housing having a housing space formed therein; a first winding unit connected to an external power source or a load to conduct electricity and accommodated in the housing space; a shield unit accommodated in the housing space to be spaced apart from the first winding unit, and connected to ground to conduct electricity; and a semiconductive layer formed to partially cover a surface surrounding the housing space, wherein the semiconductive layer is formed to have an area smaller, by a preset ratio, than the total area of the surface surrounding the housing space, the shield unit is positioned to be in contact with the semiconductive layer in the housing space, and the semiconductive layers respectively formed on the plurality of surfaces surrounding the housing space are continuous with each other and may be in contact with the shield unit to conduct electricity.