L-Shaped Barrier Support for Dry Transformer Winding Insulation
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Solution Overview
Problem
There is a need for enhanced insulation between the low voltage winding and the medium voltage winding in resin-insulated dry electric transformers to reduce dimensions and costs while maintaining mechanical and electrical features.
Innovation Solution
An electrically insulating barrier is interposed between the windings, supported by a barrier support configured with a vertical body and horizontal leg connected at 90°, which can be coupled to a pressing device or centering member, allowing for removable and robust positioning of the insulating barrier.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If an electrically insulating barrier is interposed between the low voltage winding and the medium voltage winding, then insulation between windings is enhanced and transformer dimensions are reduced, but device complexity increases due to the additional barrier support structure
Solution Approach 1:
The barrier support integrates multiple functions into a single structure: it provides mechanical support for the insulating barrier, couples to the pressing device for positioning, and maintains the barrier in the correct location between windings. This merging of support, positioning, and coupling functions reduces the number of separate components needed.
Solution Approach 2:
The barrier support structure serves multiple purposes simultaneously: it acts as a mechanical support for the insulating barrier, provides a coupling interface with the pressing device, and ensures proper positioning and spacing between windings. This multi-functionality reduces overall device complexity despite adding insulation capability.
2Volume of stationary object
If an insulating barrier is added between windings, then transformer dimensions and costs are reduced, but the structure becomes more complex requiring additional support mechanisms
Solution Approach 1:
The barrier support combines the functions of mechanical support, positioning, and coupling into a single integrated structure, eliminating the need for separate support mechanisms and reducing overall structural complexity despite enabling compact transformer dimensions.
Solution Approach 2:
The barrier support is designed with pre-formed coupling features that interface with the pressing device, allowing the insulating barrier to be positioned and secured in advance during assembly. This preliminary structuring simplifies the overall assembly process and reduces the complexity of support mechanisms needed.
3Ease of operation
If a barrier support with horizontal leg is used to couple to pressing device, then barrier positioning is robust and removable, but manufacturing complexity increases
Solution Approach 1:
The barrier support is divided into distinct segments: a vertical body for supporting the insulating barrier and a horizontal leg for coupling to the pressing device. This segmentation allows each part to be manufactured independently using standard processes, then assembled together, reducing overall manufacturing complexity while maintaining robust positioning capability.
Solution Approach 2:
The L-shaped configuration with vertical body and horizontal leg utilizes three-dimensional space efficiently, allowing the barrier support to engage with the pressing device in one dimension while supporting the barrier in another dimension. This spatial arrangement simplifies manufacturing compared to more complex spatial mechanisms.
Data Source
Figure 1~2
Figure 3
Figure 4a~4d
AI summary
A spacer member is described configured to separate a first winding from a second winding of a resin-insulated dry electric transformer and to support a plate of electrically insulating material interposed between said first winding and said second winding, the spacing member comprising a vertical body and a horizontal leg connected substantially at 90°, wherein said horizontal leg is configured so as to couple in a removable way to a pressing device.