Split Braid Inductive Charging Coil for Compact Vehicle Systems
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Inductive charging systems for motor vehicles face challenges in reducing space requirements and enhancing resistance to interference, as they need to be compactly designed with integrated coils and ferrite bodies, which limits their efficiency and reliability.
Innovation Solution
The system employs a coil device with multiple separate line strands that are electrically connected and magnetically coupled, allowing for increased inductance and reduced space usage, while also incorporating capacitors and a control device with voltage multiplication and rectification circuits to improve efficiency and interference resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the charging system is designed compactly with integrated coils and ferrite bodies, then the space requirement is reduced, but the efficiency and reliability deteriorate
Solution Approach 1:
The coil device is divided into multiple separate line strands (at least two conductor strands) that are electrically connected at the ends but magnetically coupled along their length. This segmentation allows each strand to contribute to the magnetic field while maintaining electrical connectivity, achieving compact design without sacrificing efficiency or reliability
Solution Approach 2:
The multiple conductor strands are arranged in a nested or parallel configuration where they touch or are guided close together, creating a compact structure. The strands are essentially parallel to each other and can be twisted together, allowing them to occupy minimal space while maintaining their individual electrical paths and magnetic coupling
2Quantity of substance
If multiple separate line strands are used with electrical connection and magnetic coupling, then the inductance increases and space usage is reduced, but the device complexity increases
Solution Approach 1:
The multiple conductor strands are merged through electrical connection at the ends and magnetic coupling along their length. This combining effect doubles the total number of turns and increases inductance while the parallel arrangement simplifies the overall structure compared to traditional multi-winding designs
Solution Approach 2:
The multiple line strands serve multiple functions simultaneously: they provide electrical conduction paths, generate magnetic fields for inductive coupling, and contribute to current balancing. This multi-functionality increases inductance without requiring additional separate components, thereby reducing device complexity
3Temperature
If the two cable strands are routed close together and touch each other, then the magnetic coupling is enhanced, but the interference resistance may deteriorate
Solution Approach 1:
The cable strands have different local properties: they are electrically insulated from each other along their length (preventing interference) but magnetically coupled (enhancing inductive transfer). The insulation allows the strands to touch or be guided close together for magnetic coupling while maintaining electrical separation to resist interference
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 configuration effectively doubles the number of coil turns, enhances magnetic coupling, and improves current balancing, leading to increased efficiency and reduced interference, thereby enhancing the overall performance and reliability of inductive charging systems.
Implementation Method 1
The first coil device and the second coil device are suitable and intended for inductive energy transmission
Implementation Method 2
the two conductor strands are magnetically coupled
Data Source
Figure 1~2
Figure 3
Figure 4~6
AI summary
Inductive charging arrangement (1) for motor vehicles with a first induction device (2), which is in particular arranged in a stationary manner and a second induction device (4), which can be mounted on the motor vehicle, wherein the first induction device (2) has a first coil assembly (20) and the second induction device (4) has a second coil assembly (40) and the first coil assembly (22) and the second coil assembly (42) are suitable and intended for inductive energy transfer.According to the invention, at least the first coil assembly (22) has a starting section (24) which can be electrically connected to at least one further electrical element and an end section which can be electrically connected to at least one further electrical element, wherein the coil assembly has at least two conductor strands (32, 34) and these two conductor strands (32, 34) can be electrically connected separately to the further electrical element in the starting section (24) and in the end section (26).