Non-Circular Drone Charging Housing for Wireless Power Alignment
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Solution Overview
Problem
Existing wireless power transmission systems for vehicles like drones face inefficiencies due to position and alignment issues between power transmission and reception coils, leading to insufficient electromagnetic induction and misalignment during charging, which affects charging efficiency and vehicle inspection accuracy.
Innovation Solution
A power transmission device with a housing that has a non-true circular cross-section, resembling the inner shape of the drone's frame, featuring a ferromagnetic material and power transmission coil configuration that allows self-alignment and optimal coil coupling, reducing misalignment and enhancing electromagnetic induction efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the diameter of the power reception coil is increased to ensure contact with the magnetic plate, then the reliability of power reception is improved, but position misalignment occurs leading to reduced electromagnetic induction efficiency
Solution Approach 1:
The housing is designed with a non-circular cross-sectional shape that does not match the circular power reception coil, creating a tapered configuration where the housing width is larger than the coil diameter. This asymmetric design allows the coil to be constrained within the housing while maintaining proper alignment with the magnetic plate, resolving the contradiction between ensuring contact reliability and preventing position misalignment.
2Manufacturing precision
If the power reception coil is made smaller to improve alignment precision, then position misalignment is reduced, but the coil may separate from the magnetic plate reducing power reception reliability
Solution Approach 1:
The power reception coil is nested within the housing structure, with the coil diameter being smaller than the housing width. This nesting arrangement allows the housing to act as a guide and constraint, ensuring the coil remains properly positioned and aligned with the magnetic plate during the landing and charging process, thereby maintaining both alignment precision and contact reliability.
3Adaptability or versatility
If a ring-shaped frame is used to accommodate the power reception coil, then the structure can support various coil sizes, but the distance between the frame and transmission coil increases reducing coupling coefficient
Solution Approach 1:
The housing is designed with a tapered shape where the width varies along the vertical direction, with the upper portion being wider than the lower portion. This dynamic geometric configuration allows the housing to accommodate different coil sizes while maintaining optimal spacing and coupling between the transmission and reception coils, resolving the contradiction between adaptability and induction efficiency.
4Manufacturing precision
If the housing cross-section is made non-circular to improve alignment, then position misalignment is reduced, but the device complexity increases
Solution Approach 1:
The housing is constructed using a composite structure combining ferromagnetic material and non-ferromagnetic material. The ferromagnetic material forms the core structure with the non-circular cross-section for alignment, while the non-ferromagnetic material provides additional structural support and insulation. This composite approach achieves precise alignment while managing structural complexity through material differentiation.
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
The solution ensures efficient wireless power transmission by minimizing position and angle misalignment, increasing the coupling coefficient between coils, and reducing the likelihood of foreign object heating and radiated emission, while accommodating various drone sizes and configurations.
Implementation Method 1
wireless feeding is performed from the power transmission coil of the station to the power reception coil
Implementation Method 2
a ferromagnetic material and a power transmission coil are provided within the housing
Data Source
AI summary
According to one embodiment, a power transmission device including a housing for landing a vehicle, and a ferromagnetic material and a power transmission coil. An outer shape of a cross-section of the housing becomes larger from a top of the housing toward a bottom of the housing, the outer shape is a non-true circle, and the outer shape is similar to an inner shape of a frame provided in the vehicle. The ferromagnetic material is within the housing, the ferromagnetic material being continuous in an up-and-down direction of the housing. The power transmission coil is within the housing, the power transmission coil being configured to surround the ferromagnetic material.