Split Core Inductive Coupling for High Voltage Isolation
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Solution Overview
Problem
Conventional transformers with magnetic or ferromagnetic cores are bulky, heavy, and require complex designs for high voltage applications, limiting scalability and transport, and pose challenges in providing galvanic isolation at very high voltages.
Innovation Solution
Incorporating a split magnetic core with a dielectric medium for electrical isolation within the transformer's magnetic circuit, using a housing with high magnetic permeability materials and high electrical conductivity, and arranging coils in a planar distribution with independent windings and dielectric layers for modular and replaceable cells.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional transformers with magnetic or ferromagnetic cores are used, then voltage transformation and galvanic isolation are achieved, but the device volume and weight increase significantly
Solution Approach 1:
The magnetic core is divided into two separate parts (first magnetic core part and second magnetic core part) that are spatially separated by a dielectric layer. This segmentation eliminates the need for a continuous magnetic core, reducing weight while maintaining magnetic coupling through the dielectric medium between the primary and secondary windings.
Solution Approach 2:
A dielectric layer is introduced as an intermediary substance between the primary and secondary windings. This dielectric layer provides electrical isolation (preventing arcs) while allowing magnetic flux to pass through, enabling galvanic isolation without requiring a heavy continuous magnetic core structure.
2Reliability
If conventional transformers with magnetic or ferromagnetic cores are used, then voltage transformation and galvanic isolation are achieved, but the device volume increases significantly
Solution Approach 1:
The magnetic core is divided into two separate parts (first magnetic core part and second magnetic core part) that are spatially separated by a dielectric layer. This segmentation eliminates the need for a continuous magnetic core, reducing volume while maintaining magnetic coupling through the dielectric medium between the primary and secondary windings.
Solution Approach 2:
A dielectric layer is introduced as an intermediary substance between the primary and secondary windings. This dielectric layer provides electrical isolation (preventing arcs) while allowing magnetic flux to pass through, enabling galvanic isolation without requiring a heavy continuous magnetic core structure.
3Reliability
If complex design is used to ensure isolation at very high voltages, then galvanic isolation is improved, but device complexity increases
Solution Approach 1:
A dielectric layer is introduced as an intermediary substance between the primary and secondary windings. This dielectric layer provides electrical isolation (preventing arcs) while allowing magnetic flux to pass through, enabling galvanic isolation without requiring a heavy continuous magnetic core structure.
Solution Approach 2:
The dielectric layer is positioned specifically at the critical interface between primary and secondary windings where electrical isolation is most needed. This localized approach provides effective high-voltage isolation only where required, rather than requiring complex isolation mechanisms throughout the entire transformer structure.
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 reduces the volume and weight of transformers, simplifies high voltage designs, and provides effective galvanic isolation, enabling efficient voltage adjustment in multilevel power converters for high DC/DC, DC/AC, and AC/AC applications.
Implementation Method 1
At least one layer of dielectric material is arranged between the primary and the secondary, which provides isolation between the two portions of the coupling or a sufficient distance in the air that provides the required level of isolation.
Implementation Method 2
a housing made up of two halves can be used, which together surround the conductors of the coupling, made of a material with high magnetic permeability (ferrite or similar)
Implementation Method 3
The first winding (3), which is the coil-shaped copper coil of the primary stage, and, facing it, the second winding (6), which is the coil-shaped copper winding of the secondary stage
Data Source
Figure 1
Figure 2a~2c
Figure 3
AI summary
A coupling device is described that unlike coupling devices known in the state of the art enables coupling by air or dielectric medium for multilevel power converters in applications of level adjustment of very high DC and AC voltage to be provided. The inductive coupling device object of the invention substitutes the stage of the conventional transformer for an inductive power transmission system through the air or dielectric medium. The invention is characterised in that it performs the isolation stage between the primary and secondary for very high voltage ranges in a simpler and more modular manner. Two alternatives are considered: a magnetic core physically split and separated, or an air or dielectric material core. Likewise, an object of the invention is an electronic transformer comprising said inductive coupling device.