Expandable Relay Coils for Wireless Power Alignment
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Solution Overview
Problem
Conventional wireless power supply systems face challenges in achieving long-distance power transmission without increasing cost and size, requiring large coils and relay devices, which complicate control and are prone to efficiency issues due to vehicle height variations and foreign object interference, and are limited by high impedance and voltage constraints.
Innovation Solution
The system employs expandable bags to adjust the position of power supply and relay coils, using gas supply and exhaust mechanisms to optimize the distance and alignment between coils, eliminating the need for vehicle height adjustment mechanisms and reducing the risk of foreign object contamination, while incorporating magnetic materials to enhance power transmission efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of stationary object
If large coils are used to achieve long-distance power transmission, then power transmission distance is improved, but device complexity and cost increase
Solution Approach 1:
The patent employs movable relay devices that can dynamically adjust their positions between the power supply coil and power receiving coil. This dynamic positioning capability allows the system to maintain efficient power transmission over varying distances without requiring permanently large coils, thereby reducing overall device complexity while achieving long transmission distances.
Solution Approach 2:
The patent introduces relay devices as intermediary components between the power supply coil and power receiving coil. These relay devices facilitate power transmission over long distances by creating intermediate magnetic coupling points, allowing the system to achieve extended transmission ranges without directly increasing the size of the primary coils.
2Loss of energy
If relay devices are added to maintain power transmission efficiency, then power transmission efficiency is improved, but device complexity and control difficulty increase
Solution Approach 1:
The patent incorporates feedback mechanisms that monitor the relative positions of the power supply coil, relay devices, and power receiving coil. This feedback information is used to automatically adjust the positions of relay devices and optimize power transmission efficiency, reducing the need for complex manual control systems while maintaining high efficiency.
Solution Approach 2:
The relay devices are designed with self-adjusting capabilities that allow them to automatically position themselves optimally between the power supply coil and power receiving coil. This self-service functionality reduces the complexity of external control systems while maintaining power transmission efficiency.
3Productivity
If vehicle height adjustment mechanisms are implemented to correct position deviations, then power reception efficiency is improved, but device complexity and cost increase
Solution Approach 1:
Instead of adjusting the vehicle height to maintain optimal positioning, the patent inverts the approach by moving the relay devices to adapt to the vehicle's position. This inversion eliminates the need for complex vehicle height adjustment mechanisms while achieving the same goal of maintaining optimal power transmission alignment.
Solution Approach 2:
The relay devices serve as intermediary components that can be positioned to compensate for vehicle height variations. By placing these flexible intermediate elements between the fixed power supply coil and the vehicle-mounted power receiving coil, the system achieves efficient power transfer without requiring the vehicle itself to be mechanically adjusted.
4Reliability
If foreign object removal systems are added to prevent interference, then power transmission reliability is improved, but device complexity increases
Solution Approach 1:
The patent employs relay devices as intermediary components that create a controlled magnetic coupling path between the power supply coil and power receiving coil. This intermediate magnetic path is less susceptible to foreign object interference, as the relay devices maintain tight magnetic coupling that isolates the power transmission from external disturbances, thereby improving reliability without requiring separate foreign object detection or removal systems.
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 approach enables efficient long-distance power transmission with reduced costs and complexity, maintaining high power transmission efficiency by optimizing coil alignment and impedance, and preventing foreign object interference, thus overcoming the limitations of conventional systems.
Implementation Method 1
a power supply coil (primary side coil) provided on a power supply side and a power receiving coil (secondary side coil) provided on a power receiving side
Implementation Method 2
incorporating magnetic materials to enhance power transmission efficiency
Data Source
AI summary
A wireless power supply system includes a power supply coil installed on the ground, an inner balloon in which a power supply coil is mounted and configured to expand and contract to adjust a vertical position of the power supply coil, and an outer balloon provided to cover both the power supply coil and the inner balloon and configured to expand to occupy a space between the power supply coil and a power receiving coil, and wirelessly supplies power from the power supply coil to the power receiving coil.