Multilayer Coil Power Transmission Unit Reducing High Frequency Resistance
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Solution Overview
Problem
Conventional power transmission devices experience efficiency decreases during wireless power transmission, necessitating improvements in power transmission units.
Innovation Solution
A power transmission unit is designed with a multilayer substrate configuration, featuring first and second coil pattern groups spirally formed around an axial line, with specific connections between coil patterns to enhance wireless power transfer efficiency, reducing high frequency resistance and proximity effects.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If conventional single-layer coil design is used, then manufacturing is simpler, but power transmission efficiency decreases due to high frequency resistance and proximity effects
Solution Approach 1:
The coil structure is divided into multiple layers (first layer and second layer) with each layer containing separate coil patterns. This segmentation allows current to be distributed across multiple paths, reducing proximity effects and high frequency resistance, thereby improving power transmission efficiency while managing structural complexity through systematic arrangement.
Solution Approach 2:
The invention transitions from a single-layer planar coil design to a multi-layer three-dimensional structure. By stacking coil patterns on different layers and connecting them through conductive vias, the design adds the vertical dimension to the coil architecture, enabling current distribution in multiple spatial dimensions and reducing electromagnetic interference between adjacent conductors.
2Reliability
If multi-layer coil pattern groups are used, then high frequency resistance and proximity effects are reduced, but manufacturing complexity increases
Solution Approach 1:
Multiple coil patterns are merged into a unified multi-layer structure where first and second coil pattern groups are interconnected through conductive vias. This merging creates a cohesive electromagnetic system that functions as a single integrated unit, improving power transmission stability while allowing standardized manufacturing processes to be applied to the entire assembly.
Solution Approach 2:
The coil patterns are arranged in a nested configuration where inner coil patterns and outer coil patterns are positioned concentrically around a central axis. This nested arrangement optimizes magnetic flux distribution and reduces leakage, improving transmission reliability while maintaining a compact form factor that simplifies integration into the overall device 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
The configuration improves power transmission efficiency by reducing high frequency resistance and heat loss, allowing for effective wireless power transmission while simplifying manufacturing and reducing costs compared to traditional coil designs.
Implementation Method 1
The power transmission device wirelessly transmits electric power from the power transmission coil to a counterpart power receiving coil by electromagnetic induction
Data Source
AI summary
In a power transmission unit, a first coil pattern group and a second coil pattern group are connected with each other with an upper layer outer pattern, located outside in an axial line direction and outside in the intersecting direction, connected with a lower layer inner pattern, located outside in the axial line direction and inside in the intersecting direction. Furthermore, the first coil pattern group and a second coil pattern group are connected with each other with a lower layer outer pattern, located inside in the axial line direction and outside in the intersecting direction, connected with an upper layer inner pattern, located inside in the axial line direction and inside in the intersecting direction.