Wireless Power Coil Recessed Gap for Underwater Cooling
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Solution Overview
Problem
In wireless power supply systems, especially underwater, the fixed positional relationship between power-transmitting and power-receiving coils leads to inefficient cooling due to a lack of liquid interposed between them, causing temperature increases and reduced cooling efficiency.
Innovation Solution
A wireless power supply system with coil pairs disposed to be opposable, where at least one device is movable, incorporating a recessed section with a gap to accommodate the other device, and a controller to adjust power distribution between coil pairs based on efficiency, along with a scraper member to remove foreign materials, ensuring effective liquid flow for cooling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the positional relationship between power-transmitting coil and power-receiving coil is firmly fixed, then power supply efficiency is improved, but cooling efficiency deteriorates due to insufficient liquid flow
Solution Approach 1:
The patent introduces a movable mechanism that allows the power-receiving device to move relative to the power-transmitting device within a recessed section. This dynamic adjustment enables the system to maintain optimal positioning for power transfer while allowing liquid to flow between the coils for effective cooling, resolving the contradiction between fixed positioning for efficiency and mobility for cooling.
2Temperature
If the distance between power-receiving coil and power-transmitting coil increases, then cooling efficiency is improved due to better liquid flow, but power supply efficiency decreases
Solution Approach 1:
The patent utilizes a three-dimensional recessed section structure that allows the power-receiving device to move in multiple directions. This dimensional freedom enables the system to optimize both the gap distance for cooling and the positional alignment for power transfer efficiency simultaneously, rather than being constrained to a single distance parameter.
3Productivity
If power-transmitting device and power-receiving device are in close contact, then power supply efficiency is improved, but cooling efficiency deteriorates due to lack of liquid interposition
Solution Approach 1:
The patent introduces liquid as an intermediary substance that flows between the power-transmitting coil and power-receiving coil. This liquid intermediary enables simultaneous achievement of close contact for efficient power transfer and adequate heat dissipation, as the liquid serves both as a thermal management medium and allows the coils to maintain proximity for coupling.
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 maintains low temperatures between the coils, preventing a decrease in cooling efficiency and ensuring stable power supply by allowing liquid flow and efficient heat dissipation, while allowing for mobility and preventing mechanical damage.
Implementation Method 1
efficient cooling can be achieved by dissipation of heat to the water
Implementation Method 2
the liquid is not exchanged. Accordingly, the temperature of the liquid is likely to increase. When the temperature of the liquid increases, there is a problem in that the liquid cannot absorb heat from the power-receiving coil or the power-transmitting coil
Implementation Method 3
a power-transmitting device that performs wireless power supply to a power-receiving device having a relatively movable relationship using coil pairs disposed to be opposable
Data Source
AI summary
A platform performs wireless power supply to an underwater mobile object having a relatively movable relationship using coil pairs disposed to be opposable. The platform includes: a recessed section configured to accommodate at least a part of the underwater mobile object with a gap; a coil configured to constitute the first opposable coil pair (5A) on a first wall portion of the recessed section facing each other; and a coil configured to constitute the second opposable coil pair on a second wall portion of the recessed section facing each other.