Secondary Coil Topology for Interoperable Inductive Charging
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Solution Overview
Problem
Existing coil arrangements for inductive charging systems have interoperability issues, requiring specific magnetic field patterns for optimal energy transfer, leading to high losses and increased costs due to additional receiving coils.
Innovation Solution
A coil apparatus with a first and second coil connected in series, running in opposite directions, and internally and externally arranged conductors lying in diverging planes, enhanced by a ferrite arrangement to guide magnetic fields and reduce stray fields, allowing flexibility across different magnetic field patterns.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If additional receiving coils are added to improve interoperability, then interoperability is improved, but weight and cost increase
Solution Approach 1:
The coil apparatus is divided into a first coil and a second coil with different winding paths, each segment optimized for different magnetic field patterns. This segmentation allows the system to handle multiple field patterns without adding complete additional coil assemblies, thereby improving interoperability while controlling weight
Solution Approach 2:
The coil apparatus is designed to serve multiple functions by accommodating both circular and bipolar magnetic field patterns through its dual-coil structure with diverging planes. This multi-functionality eliminates the need for separate specialized coils for each field pattern, reducing overall weight while maintaining broad interoperability
2Adaptability or versatility
If additional receiving coils are added to improve interoperability, then interoperability is improved, but cost increases
Solution Approach 1:
The first and second coils are electrically connected in series and integrated into a single coil apparatus structure. This merging approach consolidates multiple functional elements into one manufacturable unit, reducing assembly complexity and cost while maintaining the interoperability benefits of having multiple coil configurations
Solution Approach 2:
By designing a single coil apparatus that can handle both circular and bipolar magnetic field patterns through its diverging plane structure, the invention eliminates the need to manufacture and stock multiple different coil types, thereby reducing manufacturing costs while improving interoperability
3Loss of energy
If specific coil topology is used for optimal energy transfer, then energy transfer efficiency is improved, but adaptability to different magnetic field patterns deteriorates
Solution Approach 1:
The coil apparatus is segmented into a first coil and a second coil with different winding paths oriented in diverging planes. Each segment is optimized for different magnetic field patterns, allowing the system to maintain high energy transfer efficiency across multiple field pattern types without sacrificing adaptability
Solution Approach 2:
The invention introduces a dimensional aspect by arranging conductors in diverging planes rather than a single plane. This spatial arrangement allows the coil apparatus to effectively interact with both circular and bipolar magnetic field patterns, maintaining efficient energy transfer across different field geometries
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
Improves interoperability and alignment tolerance, maintaining efficient energy transfer despite positional deviations, while being cost-effective and compact.
Implementation Method 1
The primary device is designed to generate an alternating magnetic field. The secondary device is designed to receive an or the alternating magnetic field and to generate an induction current from the alternating magnetic field.
Implementation Method 2
enhanced by a ferrite arrangement to guide magnetic fields and reduce stray fields
Data Source
AI summary
The invention relates to a coil apparatus for an inductive receiving apparatus, including a first coil with a plurality of first turns and a second coil with a plurality of second turns, wherein the first and the second coils are connected to one another in series and are wound in opposite directions relative to each other, wherein each turn includes an internally arranged conductor section and an externally arranged conductor section. With the objective of improving the interoperability of the coil apparatus, a portion of the first and second turns include respectively the internally and externally conductor section arranged such that the first and second turns respectively lie in one plane or span one plane, wherein these planes diverge with respect to one another in the direction from the first coil to the second coil or vice versa, depending on whether the conductor sections are in the portion of the first turns or of the second turns.