Transformer High-Voltage Grounding Structure for Stable Coil Connection
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Solution Overview
Problem
The existing grounding designs for high voltage coils in transformers suffer from instability and reliability issues due to poor contact between the grounding layer and the insulation layer, leading to potential disconnection and reduced safety.
Innovation Solution
A grounding structure is implemented with an embedded member and a connector that are electrically conductive, where the embedded member is isolated by an insulator, and the connector is directly or indirectly connected to the grounding layer, forming a stable grounding path that is not easily damaged by external forces.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a plurality of insulating members are disposed between the upper arm and the lower arm to improve insulation reliability, then the insulation performance is enhanced, but the number of parts and device complexity increase
Solution Approach 1:
The patent combines multiple insulating members into a single integrated insulating member that performs the insulation function between both the upper arm and lower arm. This merged structure maintains the required insulation reliability while reducing the number of separate parts and simplifying the overall device complexity.
Solution Approach 2:
The insulating member is designed to serve multiple functions simultaneously: it provides insulation between the upper arm and lower arm, supports the electrical connection structure, and maintains the structural integrity of the high-voltage assembly. This multi-functional design reduces the need for separate components.
2Reliability
If the insulating member has a large contact area with the upper arm and lower arm to improve connection stability, then the connection reliability is enhanced, but the manufacturing precision requirements increase
Solution Approach 1:
The insulating member features localized contact areas with increased surface area at specific positions where it contacts the upper arm and lower arm. These localized enlarged contact surfaces improve connection stability without requiring high precision across the entire component, as only specific regions demand manufacturing accuracy.
Solution Approach 2:
The insulating member is designed with distinct functional zones: larger contact areas for stable electrical connection and smaller sections for positioning and support. This segmentation allows different parts of the insulating member to have different dimensional tolerances, reducing overall manufacturing precision requirements while maintaining connection stability.
3Ease of operation
If the electrical connection structure is exposed at the upper side for easy connection operations, then the ease of operation is improved, but the insulation performance deteriorates due to exposure to external environment
Solution Approach 1:
The insulating member acts as an intermediary structure that provides accessible connection points for electrical connections while simultaneously protecting these connection points from direct exposure to the external environment. The insulating material mediates between the need for easy access and the need for environmental protection.
Solution Approach 2:
The electrical connection structure is nested within or adjacent to the insulating member, which provides both access and protection. The insulating member envelops or surrounds the connection areas, creating a protected interface that remains accessible for operations while shielding from environmental factors.
Data Source
Figure 1A~1B
Figure 2A
Figure 2B
AI summary
This application relates to a high voltage component of a transformer, a transformer, and electric power equipment. The high voltage component (20) includes a high voltage coil (21), an insulator (22), a grounding structure (23), and a grounding layer (24). The grounding structure includes an embedded member (231) and a connector (232) that are interconnected. The embedded member is located inside the insulator, and a part of a surface of the embedded member is exposed and is configured to fasten a grounding connector (90). The connector (232) is located on an outer surface of the insulator and is connected to the grounding layer. The grounding layer covers outer surfaces of the insulator and the connector (232), and the grounding layer (24), the connector (232), the embedded member (231), and the grounding connector (90) are sequentially electrically connected to form a grounding path. The high voltage component provided in embodiments of this application has the stable and reliable grounding path.