Magnetic Component Winding Layout for Flux Leakage Reduction
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Solution Overview
Problem
Conventional magnetic components, such as isolation transformers, fail to effectively reduce the diffusion of magnetic fluxes outside the component, leading to increased electromagnetic noise and reduced efficiency in power transfer.
Innovation Solution
A magnetic component design featuring a first winding and a second winding that are insulated and magnetically coupled, with specific positional and radii constraints (r1min>rX, r1max<rZ) to minimize magnetic flux leakage, allowing the second winding to be wound at increased density and positioned in areas X, Y, and Z to reduce flux diffusion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If conventional transformer structure is used, then manufacturing is simple, but magnetic flux diffusion outside the component cannot be reduced
Solution Approach 1:
The second winding is divided into multiple discrete coil units (first through fourth coil units) positioned at specific radial distances from the central axis. Each coil unit is independently positioned to create a segmented magnetic shielding effect that collectively reduces magnetic flux diffusion outside the transformer without requiring a complete structural redesign.
Solution Approach 2:
Different coil units are positioned at different radial distances (r1min<r1max, r2min<r2max, etc.) to create localized magnetic field control zones. The varying radial positions and axial length ratios (L1/A1, L2/A2) allow each section to optimize magnetic flux containment at its specific location, achieving overall reduced diffusion through localized optimization.
2Object-affected harmful factors
If second winding is wound at increased density, then magnetic flux diffusion is reduced, but manufacturing precision requirements increase
Solution Approach 1:
The second winding is segmented into multiple coil units with defined radial positioning ranges (r1min to r1max, r2min to r2max). This segmentation allows manufacturing within tolerances while maintaining the overall magnetic shielding effect, reducing the impact of individual position variations on electromagnetic noise.
Solution Approach 2:
The design specifies radial distance ranges rather than fixed values, and defines axial length ratios (L1/A1, L2/A2) as key parameters. This parameter-based approach with defined ranges provides manufacturing flexibility while ensuring the magnetic flux diffusion reduction effect is achieved, balancing precision requirements with manufacturability.
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 design significantly reduces magnetic flux leakage, enhancing isolated power transfer efficiency and minimizing electromagnetic noise, while also allowing for more precise control over the magnetic flux distribution.
Implementation Method 1
a first winding (101); and a second winding (201) which is insulated from the first winding (101) and magnetically couples with the first winding (101)
Data Source
AI summary
A magnetic component includes a first winding and a second winding which is insulated from the first winding and magnetically couples with the first winding. The first winding forms a first coil unit by being wound. The second winding forms a second coil unit by being wound about the same axis as the first winding. The second winding forming the second coil unit is disposed in areas X and Z. The magnetic component has the first coil unit and the second coil unit at positions that satisfy Equations 1 and 3.