Magnetic Sheet Coil Layout for Stable DC Superimposition
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Magnetic saturation occurs in magnetic sheets when used instead of non-magnetic PCB substrates, leading to deterioration of DC superimposition characteristics in coil components.
Innovation Solution
A coil component design featuring a metal powder-containing resin element body with overlapping coil structures and a magnetic sheet, where the inner edges of the coil structures back down relative to the magnetic sheet, allowing magnetic flux to circulate and reducing partial concentration, thereby suppressing DC superimposition characteristic deterioration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the inner edge of the coil structure is aligned with the inner edge of the magnetic sheet, then manufacturing is simplified, but magnetic flux concentration occurs and DC superimposition characteristics deteriorate
Solution Approach 1:
The patent applies local quality by creating a recessed region at the inner edge of the magnetic sheet, where the magnetic sheet thickness is reduced locally. This localized structural modification allows magnetic flux to circulate more effectively in the recessed region, preventing magnetic saturation at critical locations while maintaining the overall magnetic coupling benefits of using a magnetic sheet.
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 effectively suppresses magnetic saturation and maintains DC superimposition characteristics by facilitating magnetic flux circulation, enhancing the performance of the coil component.
Implementation Method 1
the magnetic flux generated from the coil easily circulates
Implementation Method 2
magnetic saturation is likely to occur in the magnetic sheet
Data Source
AI summary
Since the magnetic sheet is adopted as the coil component, magnetic saturation is likely to occur in the magnetic sheet, and it is considered that the DC superimposition characteristic of the coil component is deteriorated. However, since the inner edge of the coil structure backs down with respect to the inner edge of the magnetic sheet so that the magnetic flux generated in the coil easily circulates, the deterioration of the DC superimposition characteristics due to the adoption of the magnetic sheet is suppressed.