E-Shaped Core Induction Charging Gap Minimization
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Solution Overview
Problem
Conventional electromagnetic induction charging systems for electric vehicles face low power transfer efficiency due to a large gap between the power supply device embedded in the road and the power acquisition device on the vehicle, limited lateral movement tolerance, and the risk of collision with obstacles, which affects efficiency and safety.
Innovation Solution
The design includes a power supply device with an E-shaped core structure and a power acquisition device with a matching E-shaped core structure, featuring equally spaced core portions and magnetic field generating units, along with wheel-shaped rotary magnetic field transfer members and magnetic brushes to minimize gaps and enhance lateral deviation tolerance, and a safety system to prevent collisions with obstacles.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If the gap between the primary and secondary coils is reduced to increase power transfer efficiency, then the power transfer efficiency is improved, but the power acquisition device may collide with obstacles on the road and be damaged
Solution Approach 1:
The patent applies beforehand cushioning by providing a shock absorber between the power acquisition device and the vehicle body, and a protection plate at the front end of the power acquisition device. These protective structures are pre-installed to cushion against potential collisions with obstacles, allowing the device to operate at a minimal safe gap distance while protecting against damage from road obstacles.
2Loss of energy
If the gap between the primary and secondary coils is reduced to increase power transfer efficiency, then the power transfer efficiency is improved, but the manufacturing precision requirements increase due to the need for precise alignment
Solution Approach 1:
The patent applies dynamics by making the power acquisition device movable relative to the vehicle body through a shock absorber and link mechanism. This dynamic structure allows the device to automatically adjust its position to maintain optimal alignment with the primary coil on the road, compensating for variations in vehicle suspension and road conditions, thereby reducing the need for extremely high manufacturing precision.
3Area of stationary object
If E-shaped magnetic cores with lateral width of about 100 cm are used, then the magnetic field coverage is improved, but the lateral movement tolerance is limited requiring careful driving or additional control systems
Solution Approach 1:
The patent applies segmentation by dividing the E-shaped magnetic core into multiple smaller magnetic cores arranged in parallel. This segmented configuration increases the lateral movement tolerance because the power acquisition device can remain within the magnetic field coverage area even when laterally deviated, as multiple segmented cores provide overlapping magnetic field coverage across a wider lateral range.
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 increases power transfer efficiency, allows for greater lateral deviation tolerance, and reduces the risk of collision with obstacles, thereby enhancing the overall performance and safety of electromagnetic induction charging systems for electric vehicles.
Implementation Method 1
a power supply device with an E-shaped core structure and a power acquisition device with a matching E-shaped core structure, featuring equally spaced core portions and magnetic field generating units
Implementation Method 2
magnetic field generating units, along with wheel-shaped rotary magnetic field transfer members
Data Source
AI summary
It is provided a power supply device and a power acquisition device for an electromagnetic induction-powered electric vehicle that increase a power transfer efficiency by maximizing a lateral deviation tolerance and by minimizing a gap between the power acquisition device and the power supply device while preventing the power acquisition device from colliding with an obstacle present on a road and being damaged by the collision.