Ferrite Core Segmentation for EV Power Supply Road Crack Prevention
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Solution Overview
Problem
Conventional ferrite core structures in power supply roads for electric vehicles suffer from crack formation and strength degradation due to deflection loads from passing vehicles, leading to reduced output and increased risk of damage.
Innovation Solution
A ferrite core structure with horizontal and vertical core portions, supported by connecting elements, and embedded steel bars in the traveling direction of vehicles to disperse deflection loads and prevent flux leakage, enhancing magnetic field concentration and road surface integrity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If vertical core portions are aligned in a central portion at predetermined intervals, then the power supply road can function for contactless charging, but cracks form on the surface of the intermediate portion due to deflection loads from passing vehicles
Solution Approach 1:
The ferrite core is divided into multiple vertical core portions aligned at predetermined intervals, with each portion independently supported by supporting portions. This segmentation distributes the deflection load across multiple support points rather than concentrating it, preventing crack formation while maintaining the magnetic field generation function for contactless charging
Solution Approach 2:
Supporting portions are introduced as intermediary elements between the vertical core portions and the road structure. These supporting portions provide additional mechanical support to prevent excessive deflection of the ferrite core under vehicle loads, thereby preventing crack formation while allowing the core to maintain its charging function
2Duration of action of stationary object
If the ferrite core structure is modified to prevent crack formation, then road durability is improved, but the magnetic field generation efficiency may be affected
Solution Approach 1:
The ferrite core structure employs different configurations of vertical core portions at different locations - with supporting portions positioned at specific intervals to provide mechanical support where needed. This local differentiation maintains magnetic field generation efficiency in the active charging zones while providing enhanced structural support in intermediate portions prone to cracking
Solution Approach 2:
The power supply road structure combines ferrite core portions with supporting portions and road material to create a composite structure. This composite design integrates the magnetic properties of ferrite with the mechanical strength of the supporting structure, achieving both durability and magnetic field generation efficiency
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 modified ferrite core structure effectively prevents crack formation and increases output by dispersing deflection loads and maintaining magnetic field strength, while the embedded steel bars reduce strength degradation and enhance road durability.
Implementation Method 1
a ferrite core module 1 installed under the power supply line 2 to prevent a flux leakage. Here, the ferrite core module 1 may correspond to a structure that may block a flux leakage into left, right, and lower portions to concentrate a magnetic flux in a direction of an upper portion
Implementation Method 2
A principle of a transistor that receives, as electric energy, a force of a magnetic field occurring in a power supply device (hereinafter, referred to as a 'power supply rail') implanted in a road may be applied to a power collection device of such a contactless magnetic induction charging type electric vehicle
Data Source
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AI summary
The present invention relates to a ferrite core structure for a power supply device of an electric vehicle which changes the structure of a ferrite core module according to a related art to improve output and limits a reduction in strength due to warpage in a traveling direction of the vehicle to prevent cracks generated in a surface of an intermediate portion of a power supply road from occurring. For this, the ferrite core structure for a power supply device of the electric vehicle includes: a plurality of horizontal core parts arranged spaced apart from each other to prevent a magnetic flux from leaking into the ground; a plurality of first vertical core parts extending upward from both ends of the horizontal core parts to prevent the magnetic flux from leaking into an outer surface; a second vertical core part having at least two rows extending upward from an intermediate portion of each of the horizontal core parts, the second vertical core part being arranged in a direction parallel to the first vertical core parts; and a first support part connecting the plurality of first vertical core parts to each other to support the first vertical core parts.