Segmented Feed Core for Lateral Deviation in Inductive EV Charging
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Solution Overview
Problem
Existing magnetic induction-based power transfer systems for electric vehicles are inefficient when the current collector is misaligned with the feed line, leading to reduced power transfer due to increased opposing magnetic flux and decreased induced electromotive force.
Innovation Solution
The implementation of a feed apparatus with a U-shaped or E-shaped feed core featuring cutting parts and coiled feed lines at the ends, and a current collector with ∩-shaped projection units and extended ends, which reduces the core usage while maintaining efficient power transfer even when the electric vehicle is deviated from the feed line.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If the current collector is positioned at the center of the feed apparatus to maximize power transfer, then the induced electromotive force is maximized, but the system becomes sensitive to lateral deviation and power transfer efficiency drops significantly when misalignment occurs
Solution Approach 1:
The feed core is divided into multiple segments along the width direction, creating multiple independent magnetic flux paths. This segmentation allows the magnetic field to be distributed across multiple regions, so that even when the current collector deviates from the center, other segments continue to provide effective magnetic coupling and induce electromotive force.
Solution Approach 2:
Different regions of the feed core are designed with varying properties - the central region has optimized magnetic characteristics for maximum coupling, while lateral regions provide extended magnetic flux paths that compensate for misalignment. This local differentiation ensures that each region contributes optimally to power transfer under different positioning conditions.
2Power
If a complete feed core structure is used to maintain magnetic flux, then power transfer efficiency is maintained, but the amount of core material increases and manufacturing complexity rises
Solution Approach 1:
The feed core is divided into multiple independent segments that can be manufactured separately and then assembled. This segmentation reduces the complexity of manufacturing a single large core, allows for modular production, and simplifies replacement and maintenance while maintaining the overall magnetic flux path integrity.
Solution Approach 2:
The feed core structure extracts only the essential magnetic path components needed for effective power transfer, removing unnecessary material and simplifying the overall structure. The segmented design allows for minimal material usage while maintaining sufficient magnetic coupling for efficient power transfer.
3Adaptability or versatility
If the feed core width is increased to accommodate lateral deviation, then alignment tolerance is improved, but the amount of core material and device footprint increase
Solution Approach 1:
Multiple narrow feed core segments are arranged side by side, creating an extended effective width for accommodating lateral deviation. This segmented approach achieves the same alignment tolerance as a single wide core but with reduced total material usage and simplified manufacturing of each individual segment.
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 supplies power to electric vehicles with minimal reduction in power transfer efficiency, even when deviated, by optimizing magnetic field distribution and reducing core material usage.
Implementation Method 1
when power of high frequency is supplied to the feed line (114) on the feed core (112), the electric vehicle (100) which is traveling on the road is supplied with power necessary for traveling according to the principle of electromagnetic induction acting between the feed apparatus (110) including the feed core (112) and the feed line (114) and the current collector (130)
Implementation Method 2
magnetic flux is generated from the feed line (114) in an arrow direction of semicircle and causes induced electromotive force to be generated in the current collection line (134)
Data Source
AI summary
An embodiment of the present invention relates to a feed apparatus, a current collector, and a power transfer apparatus of the magnetic induction type, considering lateral deviation. An embodiment of the present invention relates to a power transfer apparatus comprising a feed apparatus and a current collector wherein the feed apparatus includes: a feed main unit having a predetermined width and length; a feed core forming a feed projection unit projected in the same direction and being perpendicular to both the width direction and the length direction at the left end and the right end of the width direction, with respect to a cutting side of the feed main unit in the width direction; and a pair of feed lines coiled respectively at the left end and the right end of the feed main unit in a length direction of the feed core adjacent to the feed projection unit, and the current collector includes: a current collection main unit having a predetermined width and length; a current collection core having a current collection projection unit projected in the same direction and being perpendicular to both the width direction and the length direction at a left end and a right end of a width direction, with respect to a cutting side of the current collection main unit in the width direction, and equipped with an extension unit extended toward each width direction in the current collection projection unit; and a current collection line coiled respectively at the left side and the right side of the current collection projection unit of the current collection core.