Transformer With Grounded Shielding Layer For High Isolation
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Solution Overview
Problem
Traditional transformer designs for auxiliary power supplies face challenges in achieving high security isolation while minimizing space and improving power density, as existing solutions either occupy excessive space or compromise efficiency due to two-stage magnetic element isolation or suffer from material stress and heat dissipation issues with one-stage isolation.
Innovation Solution
A transformer design featuring a magnetic core with a primary side winding covered by sequential solid insulating layers and a grounded shielding layer, eliminating the need for two-stage isolation and embedment, allowing for a more compact and efficient electric field distribution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If two-stage magnetic element isolation is used to achieve high security isolation, then the isolation safety is improved, but the space volume occupied by the transformer increases
Solution Approach 1:
The patent merges the isolation function into a single-stage magnetic element structure by integrating a grounded shielding layer within the magnetic element. This combines the magnetic transformation function and the electrical isolation function into one unified component, eliminating the need for separate two-stage isolation structures and reducing overall transformer volume while maintaining high isolation safety.
Solution Approach 2:
The patent introduces a grounded shielding layer as an intermediary component within the single-stage magnetic element. This shielding layer acts as a mediator that provides electrical isolation between primary and secondary windings through ground reference, enabling high security isolation without requiring multiple stages of magnetic elements and thereby reducing space occupation.
2Reliability
If two-stage magnetic element isolation is used to achieve high security isolation, then the isolation safety is improved, but the system efficiency deteriorates
Solution Approach 1:
The patent merges the isolation function into a single-stage magnetic element structure by integrating a grounded shielding layer within the magnetic element. This combines the magnetic transformation function and the electrical isolation function into one unified component, eliminating the need for separate two-stage isolation structures and reducing overall transformer volume while maintaining high isolation safety.
3Device complexity
If one-stage isolation with grounded aluminum pipe and magnetic element is used, then the structure is simplified, but material stress and heat dissipation problems occur
Solution Approach 1:
The patent employs composite material construction for the magnetic element, combining magnetic core material with integrated shielding layer material. This composite structure distributes mechanical stress more evenly and provides better thermal pathways compared to separate aluminum pipe and magnetic element configurations, improving heat dissipation while maintaining structural simplicity.
4Device complexity
If one-stage isolation with grounded aluminum pipe is used, then the structure is simplified, but the heat dissipation capability deteriorates
Solution Approach 1:
The patent employs composite material construction for the magnetic element, combining magnetic core material with integrated shielding layer material. This composite structure distributes mechanical stress more evenly and provides better thermal pathways compared to separate aluminum pipe and magnetic element configurations, improving heat dissipation while maintaining structural simplicity.
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 achieves a smaller space occupation, improved heat dissipation, and uniform electric field distribution, enhancing power density and safety without the need for extensive safety distances, thus addressing the limitations of previous solutions.
Implementation Method 1
a grounded shielding layer and a second solid insulating layer, sequentially, from inside to outside, along a radial direction of the wire
Implementation Method 2
a wire forming the primary side winding being covered with a first solid insulating layer, a grounded shielding layer and a second solid insulating layer
Implementation Method 3
at least one magnetic core, each having at least one window; one primary side winding passing through the at least one window of each magnetic core
Data Source
AI summary
The present disclosure provides a transformer including at least one magnetic core each having at least one window; one primary side winding passing through the at least one window, a wire forming the primary side winding being sequentially covered with a first solid insulating layer, a grounded shielding layer and a second solid insulating layer from inside to outside along a radial direction of the wire, the grounded shielding layer being connected to a reference ground; and at least one secondary side winding, each passing through the at least one window, the primary side winding having a first voltage with respect to the reference ground, the secondary side winding having a second voltage with respect to the reference ground, and the second voltage being greater than 50 times of the first voltage.