Overlapping Coil Winding Layout for Coupling Coefficient Tuning
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Solution Overview
Problem
There is a need to adjust the coupling coefficient of coil components without increasing their size, particularly in miniaturized electronic devices, as existing methods face limitations in reducing thickness and mounting area efficiently.
Innovation Solution
A coil component design featuring a core portion with first and second coil portions wound to form turns, where the coil portions overlap on a third core portion, allowing for adjustable mutual inductance and leakage inductance by varying the number of turns and separation distance, thereby controlling the coupling coefficient without increasing the component's size.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the thickness of the component is increased to adjust the coupling coefficient, then the coupling coefficient can be adjusted, but the component size increases which is not suitable for miniaturized electronic devices
Solution Approach 1:
The patent transitions from adjusting coupling coefficient through thickness (one dimension) to adjusting it through the number of overlapping turns (another dimension). The third core portion enables bifilar winding where first and second coil portions overlap in planar view, allowing coupling coefficient adjustment via turn count rather than component thickness.
Solution Approach 2:
The patent changes the parameter used for coupling coefficient adjustment from physical thickness to the number of overlapping turns. By varying the number of turns on the third core portion, the coupling coefficient can be adjusted without changing the component's thickness or overall size.
2Area of stationary object
If the component size is reduced for miniaturization, then mounting area decreases, but the ability to adjust coupling coefficient is limited
Solution Approach 1:
The patent utilizes the planar dimension (width/length) for bifilar winding and overlapping turns, rather than relying on the thickness dimension. This allows coupling coefficient adjustment within the mounting plane, enabling miniaturization without sacrificing adjustability capability.
Solution Approach 2:
The core is segmented into first, second, and third core portions, with the third core portion specifically dedicated to overlapping turns. This segmentation allows independent optimization of each region: first and second core portions for individual windings, and third core portion for coupling adjustment through overlapping.
3Adaptability or versatility
If bifilar winding is used to adjust coupling coefficient without increasing thickness, then coupling coefficient can be adjusted, but the structure becomes more complex
Solution Approach 1:
The patent merges the functions of multiple core portions: the first and second core portions support individual coil windings, while the third core portion enables overlapping turns. This merging of functions into a unified core structure with differentiated regions simplifies the overall design compared to separate components.
Solution Approach 2:
Different regions of the core have different functions: the first and second core portions are optimized for individual windings, while the third core portion is specifically designed for overlapping turns to adjust coupling. This local differentiation allows simple winding structures in each region while achieving complex coupling adjustment capability overall.
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 adjusts the coupling coefficient of the coil component, enhancing efficiency within the same size constraints, allowing for optimized performance in electronic devices by varying the number of turns and separation distance of the overlapping coil portions.
Implementation Method 1
first and second coil portions wound to form one or more turns on the core portion
Data Source
AI summary
A coil component includes a core portion, and first and second coil portions wound to form at least one or more turns on the core portion. The core portion includes a first core portion on which the first coil portion is wound, a second core portion on which the second coil portion is wound, and a third core portion which is disposed to be spaced apart from and between the first and second core portions and on which the first and second coil portions are wound to overlap each other.