Coil Component Multi-Layer Winding Reduces Parasitic Capacitance
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Solution Overview
Problem
Existing coil components with multiple layers of wound wires face limitations in increasing turns without lengthening the winding core, and the conventional parallel wiring method restricts the degree of freedom in winding, leading to increased parasitic capacitance due to adjacent turns with significant turn number differences.
Innovation Solution
The coil component design includes first and second wires wound in multiple layers with turns positioned in mutually different layers, allowing for a regular winding structure with reduced turn number differences, which suppresses parasitic capacitance by alternating and aligning wire turns across layers, and connecting them in parallel through terminal electrodes for low DC resistance and high rated current.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If the wire is wound around the winding core part in multiple layers to increase the number of turns, then the inductance is improved, but the same turns of two wires are always adjacently disposed, reducing the degree of freedom of winding work
Solution Approach 1:
The patent applies dimensionality change by distributing the same turns of first and second wires to different winding layers (first winding layer, second winding layer, third winding layer) instead of keeping them adjacent in the same layer. This spatial redistribution across multiple layers increases the degree of freedom in winding work while maintaining the required number of turns for high inductance.
2Reliability
If two wires are wound in multiple layers to provide low DC resistance and high rated current, then the electrical performance is improved, but the same turns are adjacently disposed, increasing parasitic capacitance
Solution Approach 1:
The patent reduces parasitic capacitance by separating same turns of first and second wires into different winding layers (first, second, and third winding layers). This spatial separation in the vertical dimension decreases the capacitance between adjacent turns while maintaining the parallel wire configuration needed for low DC resistance and high rated current capability.
3Ease of manufacture
If the wire is wound in a single layer to maintain simplicity, then the winding work is easier, but the length of the winding core part must be increased in proportion to the number of turns
Solution Approach 1:
The patent transitions from single-layer winding to multi-layer winding, utilizing the vertical dimension (layer stacking) to accommodate increased number of turns. This approach maintains a compact winding core part length while enabling higher inductance through increased turns, and simultaneously improves ease of manufacture by allowing systematic winding patterns across multiple layers.
Data Source
AI summary
Disclosed herein is a coil component that includes a winding core part and first and second wires wound around the winding core part. The first and second wires constitute at least three winding layers on the winding core part. The same turns of the first and second wires are positioned in mutually different winding layers over a plurality of turns.