Coil Component Design for Reduced Coupling Coefficients
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Solution Overview
Problem
The miniaturization and thinning of coil components for electronic devices pose challenges in maintaining magnetic characteristics, and there is a need for array-type coil components that reduce mounting area while minimizing coupling coefficients, which is difficult to achieve without increasing component size.
Innovation Solution
A coil component design featuring a body with perpendicular side surfaces, multiple coil portions, and extension portions connected to external electrodes, allowing for adjustable coupling coefficients through specific current flow configurations and extension portion lengths, enabling miniaturization without increasing distance between coil portions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-generated harmful factors
If the distance between coil portions is increased to lower the coupling coefficient, then the coupling coefficient is reduced, but the component size is increased
Solution Approach 1:
The patent applies local quality by creating different spatial relationships between coil portions at different locations. Specifically, coil portions are arranged such that some regions have closer spacing while others have farther spacing, creating non-uniform coupling characteristics. This allows the overall coupling coefficient to be reduced without uniformly increasing the component size in all directions.
Solution Approach 2:
The patent implements nesting by placing multiple coil portions within a compact body structure where inner coil portions are positioned closer to the center while outer coil portions are arranged around them. This nested arrangement allows efficient space utilization, reducing the overall component footprint while maintaining controlled coupling coefficients through strategic positioning of each nested coil portion.
2Reliability
If the ratio of magnetic material in the core is increased to maintain magnetic characteristics during miniaturization, then magnetic performance is improved, but the inductor body size is increased
Solution Approach 1:
The patent employs composite materials by combining magnetic material particles with a resin matrix to form a magnetic composite. This composite material allows the magnetic characteristics to be maintained through the distributed magnetic particles while the resin provides structural support and insulation, enabling miniaturization without proportionally increasing the magnetic material volume and thus avoiding excessive body size increase.
Solution Approach 2:
The patent applies parameter changes by adjusting the concentration, size distribution, and arrangement of magnetic material particles within the core. By optimizing these parameters, the magnetic characteristics (such as permeability and inductance) are maintained at desired levels while using a reduced overall volume of magnetic material, thereby preventing excessive increase in inductor body size during miniaturization.
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 effectively reduces coupling coefficients, allowing for miniaturization of coil components while maintaining performance, as demonstrated by simulation results showing a significant decrease in coupling coefficients compared to conventional designs.
Implementation Method 1
a first coil portion disposed in the body, and including a first winding portion as well as first and second extension portions, respectively connected to one end and the other end of the first winding portion, a second coil portion disposed in the body, and including a second winding portion disposed between the first side surface and the first winding portion
Data Source
AI summary
A coil component includes a body including opposing first and second side surfaces and opposing third and fourth side surfaces, a first coil portion disposed in the body, and including a first winding portion and first and second extension portions connected to the first winding portion, a second coil portion disposed in the body, and including a second winding portion disposed between the first side surface and the first winding portion, and third and fourth extension portions connected to the second winding portion, first and second external electrodes disposed on the body and respectively connected to the first and second extension portions, and third and fourth external electrodes disposed on the body and respectively connected to the third and fourth extension portions. The first extension portion of the first coil portion is disposed between the second winding portion and one of the third and fourth side surfaces.