Wireless Charging Magnet Casing With Movable Ring Magnet
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Solution Overview
Problem
Existing wireless charging technologies face challenges in compatibility and foreign object detection (FOD) when charging terminals with both general and wireless magnetic attachment-type connector charging schemes, as they often require precise alignment and are prone to FOD issues.
Innovation Solution
A wireless power transmitting apparatus with a magnet casing and ring magnet design that allows the magnet position to be adjusted based on the terminal's charging scheme, using a power transmitting coil and a magnet casing with a movable ring magnet to ensure compatibility and minimize FOD by spacing magnets apart when necessary and aligning them magnetically when applicable.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a wireless magnetic attachment-type connector charging scheme with a magnet disposed at an edge of a coil is used, then magnetic attachment and alignment are improved, but foreign object detection (FOD) occurs and compatibility with general chargers is reduced
Solution Approach 1:
The wireless charging device is divided into two independent functional modules: a power transmitting coil for wireless charging and a magnet for magnetic attachment. These modules are positioned separately in space, allowing the coil to function for general wireless charging while the magnet provides attachment force for magnetic devices without interfering with each other's operation
Solution Approach 2:
The patent transitions from a single integrated magnet-coil structure to a spatially separated configuration where the magnet is positioned at the edge of the coil rather than at the center. This dimensional rearrangement allows the magnetic field and electromagnetic field to operate in different spatial zones, enabling both magnetic attachment and general wireless charging functionality
2Force
If a magnet is disposed at an edge of a coil for magnetic attachment, then attachment force is improved, but foreign object detection (FOD) is triggered
Solution Approach 1:
The magnet is extracted from the center position of the coil and relocated to the edge position. This extraction removes the source of magnetic interference from the coil's operational zone, allowing the coil to detect foreign objects accurately while the magnet at the edge provides attachment force without triggering false FOD detection
Solution Approach 2:
The edge position of the coil acts as an intermediary zone where the magnet is placed. This intermediate location allows the magnet to exert its attachment force on the device while being positioned away from the coil's sensitive detection area, preventing the magnet from being misidentified as a foreign object
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 design enhances compatibility and minimizes foreign object detection by allowing the magnet and coil to be spaced apart for non-standard coils, while ensuring effective alignment and charging through magnetic forces for standard coils, thereby improving the durability and efficiency of wireless charging.
Implementation Method 1
a power transmitting coil for generating an induced electromotive force on a power receiving coil of a terminal
Implementation Method 2
the ring magnet is movable in a vertical direction of the magnet casing by external magnetism
Data Source
AI summary
Disclosed is a wireless power transmitting apparatus including a power transmitting coil generating an induced electromotive force on a power receiving coil of a terminal, a magnet casing composed of a first space in a cylinder shape where the power transmitting coil is inserted, and a second space sharing a central axis of the cylinder with the first space, wherein the second space is a space between the first space and a cylinder having a diameter greater than a diameter of the cylinder of the first space, a ring magnet disposed in the second space of the magnet casing in a shape of a ring, wherein the ring magnet has a height smaller than a height of the magnet casing, and is movable in a vertical direction of the magnet casing by external magnetism, and a cover constructed in a direction perpendicular to an axis of the power transmitting coil.