Power Supply Casing Inclines for Foreign Object Heating
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The existing contactless electric supply apparatus for vehicles faces issues with foreign objects being heated to high temperatures due to magnetic flux, potentially causing damage and disrupting the electric supply process.
Innovation Solution
The apparatus features a casing with a first incline portion, a second incline portion, and a recessed portion on its upper surface, designed to guide foreign objects away from the electric supply coil, reducing heat generation and preventing damage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If the upper surface of the casing is formed in parallel with the radial direction of the electric supply coil, then the electric supply efficiency is improved, but foreign objects are likely to be heated to high temperatures by magnetic flux
Solution Approach 1:
The patent applies curvature by forming the upper surface of the casing with inclined portions instead of a flat parallel surface. The inclined portions create a curved/angled geometry that redirects magnetic flux away from foreign objects while maintaining efficient electromagnetic coupling between the electric supply coil and reception section. This curved surface design allows the magnetic field to follow the inclination angles, reducing direct flux penetration into foreign objects placed on the surface.
Solution Approach 2:
The patent implements local quality by creating different surface geometries in different regions of the casing upper surface. Specifically, first and second inclined portions are formed at specific locations to locally redirect magnetic flux in critical areas where foreign objects may be placed. This localized geometric modification allows the surface to maintain overall parallel alignment for efficient power transfer while creating specific zones that protect against foreign object heating through altered flux paths.
2Use of energy by moving object
If foreign objects are heated to high temperatures during electric supply, then the heating effect indicates energy transfer, but the foreign object may cause holes and damage the upper surface
Solution Approach 1:
The patent applies preliminary anti-action by pre-forming inclined portions on the casing upper surface before electric supply operations begin. These inclined portions are designed to preemptively redirect magnetic flux away from potential foreign objects, preventing the harmful heating effect before it can occur. The geometric configuration is established in advance to counteract the potential harmful interaction between magnetic flux and foreign objects, thereby protecting the upper surface integrity proactively rather than reactively.
3Reliability
If the foreign object or debris enters from damaged portions, then the electric supply process may be affected, but preventing damage requires avoiding foreign object heating
Solution Approach 1:
The patent implements preliminary action by designing and forming the inclined portions on the casing upper surface in advance, before any electric supply operations take place. This pre-configured geometric structure is intended to continuously guide and redirect magnetic flux away from foreign objects during all subsequent operating conditions. By establishing this protective geometric configuration beforehand, the system proactively prevents foreign object heating and potential surface damage, thereby maintaining electric supply process stability without requiring active monitoring or intervention during operation.
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 being heated to high temperatures, ensuring a stable electric supply process and maintaining the integrity of the electric supply apparatus.
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
In the power supply apparatus (100), on an upper surface (202a), which is the surface opposing the power-receiving unit (153) of a cabinet (103b), in the portion where a power supply coil (103a) is projected when the power supply coil (103a) is projected on the cabinet (103b) toward the direction of the power-receiving unit (153), a first inclined part (203) gradually approaching the power supply coil (103a) from the top section (205) toward the inner edge section (211) of the power supply coil (103a) is formed in the radial direction of the power supply coil (103a), and in the portion where the power supply coil (103a) is projected, a second inclined part (204) gradually approaching the power supply coil (103a) from the top section (205) toward the outer periphery (212) of the power supply coil (103a) is formed in the radial direction of the power supply coil (103a).