Array Coil Layout for Uniform Inductance and Coupling
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Solution Overview
Problem
Array-type coil components face challenges in achieving uniform inductance and coupling coefficients among multiple coil portions, leading to inconsistent performance and increased complexity in design and manufacturing.
Innovation Solution
The design includes a body with multiple coil portions spaced apart, where the number of turns and core cross-sectional areas are adjusted to ensure uniform inductance and coupling coefficients, with specific configurations of turns and distances between coil portions to optimize inductance and coupling properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If multiple coil portions are arranged in an array to reduce mounting area, then the mounting area is reduced, but the inductance and coupling coefficients become non-uniform across different coil portions
Solution Approach 1:
The patent applies local quality by making the first outermost coil portion different from the second outermost coil portion. Specifically, the first outermost coil portion has a greater number of turns in the region adjacent to the first surface, while the second outermost coil portion has fewer turns in the region adjacent to the second surface. This asymmetric local modification compensates for the non-uniform magnetic coupling effects in the array, achieving uniform inductance and coupling coefficients across all coil portions.
2Manufacturing precision
If the number of turns is increased to achieve uniform inductance, then the inductance uniformity is improved, but the complexity of design and manufacturing increases
Solution Approach 1:
The patent applies asymmetry by intentionally designing the first outermost coil portion and second outermost coil portion with different numbers of turns. The first outermost coil portion has a greater number of turns than the second outermost coil portion, creating an asymmetric configuration that compensates for the non-uniform magnetic coupling in the array. This asymmetric design achieves uniform inductance and coupling coefficients without requiring complex adjustments to all coil portions.
3Manufacturing precision
If the distances between adjacent coil portions are adjusted to optimize coupling, then the coupling coefficient uniformity is improved, but the structural complexity increases
Solution Approach 1:
The patent applies local quality by making the distance between the first outermost coil portion and its adjacent coil portion greater than the distance between the second outermost coil portion and its adjacent coil portion. This localized structural adjustment compensates for the non-uniform magnetic coupling effects, achieving uniform coupling coefficients across all coil portions without requiring complex adjustments to the entire array 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 results in a coil component with uniform inductance and coupling coefficients across all coil portions, enhancing production efficiency and reducing defects while maintaining performance consistency.
Implementation Method 1
first to third coil portions spaced apart from each other in the first direction in the body and having turns wound in the same direction
Data Source
AI summary
A coil component includes a body having first and second surfaces opposing each other in a first direction, first to third coil portions spaced apart from each other in the first direction in the body and having turns wound in the same direction, and an external electrode disposed on the body and connected to each of the first to third coil portions, wherein the number of turns of a portion of the first coil portion disposed in a region between a winding center of the first coil portion and the first surface is greater than the number of turns of a portion of the third coil portion disposed between a winding center of the third coil portion and the second surface, and wherein a distance between the first and second coil portions is wider than a distance between the second and third coil portions.