Wireless Power Supply Coil Casing with Heat-Resistant Intermediary
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Solution Overview
Problem
The existing contactless electric supply apparatus is prone to foreign objects being heated by magnetic flux, which can cause damage and lead to short circuits when they come into contact with the electric transmission coil.
Innovation Solution
The apparatus includes a dual-structured casing with a load-capable first cover and a heat-resistant second cover, positioned between the first cover and the electric supply coil, to prevent foreign objects from reaching the coil and maintain a secure electric supply process even when heated.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the casing surface is formed in parallel with the radial direction of the transmission coil to simplify structure, then manufacturing is easier, but foreign objects can be heated by magnetic flux and cause damage to the coil
Solution Approach 1:
A heat-resistant board is introduced as an intermediary component between the casing and the transmission coil. This board serves as a barrier that prevents heated foreign objects from reaching the coil, while allowing the casing surface to maintain its simple parallel structure for ease of manufacture.
Solution Approach 2:
The casing structure is segmented into multiple functional layers: the outer casing surface, the heat-resistant board in the middle, and the transmission coil at the bottom. This segmentation allows each layer to perform its specific function - the casing provides structural support and ease of manufacture, while the heat-resistant board provides protection for the coil.
2Device complexity
If a single-layer casing is used to reduce complexity, then device structure is simpler, but it cannot simultaneously provide both load capacity and heat resistance
Solution Approach 1:
The casing system uses composite construction with different materials having different properties. The outer casing is made of a material providing load capacity and structural support, while the heat-resistant board is made of a material specifically designed to withstand high temperatures. This composite approach allows the system to achieve both load capacity and heat resistance without excessive complexity.
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 prevents foreign objects from causing short circuits and ensures a secure electric supply by isolating the electric supply coil from heated objects, maintaining both load capacity and heat resistance.
Implementation Method 1
an electric supply apparatus that contactlessly supplies electric power using electromagnetic induction to an electric reception section provided in a vehicle
Implementation Method 2
the foreign object is heated to a high temperature by a magnetic flux penetrating the foreign object during electric supply
Data Source
AI summary
A power supply apparatus capable of appropriately supplying electrical power to a power transmission coil even if a foreign object is heated during power supply. The power supply apparatus (100) is provided with a power supply coil (103a) opposing a power-receiving unit (153) provided to a vehicle and supplying power to the power-receiving unit (153), and a casing (103b) accommodating the power supply coil (103a). In the casing (103b), a first cover (202) is formed on a surface of the casing (103b) opposing the power-receiving unit (153), and a second cover (203) opposing the first cover (202) is arranged between the first cover (202) and the power supply coil (103a).