Magnetic Alignment Assembly for Stable Inductive Coil Positioning
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Solution Overview
Problem
Establishing and maintaining optimal alignment between transmitter and receiver coils in inductive charging systems is challenging due to the absence of guiding features, leading to inefficient wireless power transfer and potential misalignment during use.
Innovation Solution
A magnetic alignment assembly comprising a main magnet and a ring magnet, oriented along the axial direction, is incorporated into electronic devices to facilitate precise alignment with a charger device, enhancing alignment stability and efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If wireless charging is implemented without guiding features, then ease of operation is improved, but alignment precision deteriorates
Solution Approach 1:
Magnetic alignment assemblies are introduced as intermediary elements between the transmitter and receiver coils. These assemblies generate magnetic fields that create attractive forces, automatically guiding the coils into proper alignment without requiring manual adjustment or complex mechanical guides, thus maintaining ease of operation while achieving precise alignment
Solution Approach 2:
The patent replaces mechanical alignment guides or physical structures with a magnetic field-based alignment system. The magnetic alignment assemblies generate magnetic fields that exert forces on ferromagnetic materials or magnetic dipoles in the opposing coil, enabling automatic alignment through magnetic attraction rather than mechanical constraints
2Measurement precision
If manual alignment adjustment is required, then alignment precision can be improved, but loss of time increases
Solution Approach 1:
The magnetic alignment assemblies enable the system to self-align automatically through magnetic attraction forces. When the transmitter and receiver are brought into proximity, the magnetic fields automatically draw the coils into optimal alignment positions without requiring user intervention, thereby eliminating time loss while maintaining precision
Solution Approach 2:
The magnetic alignment assemblies are pre-configured within the charging devices to generate alignment forces as soon as the devices are brought near each other. This preliminary magnetic guidance action occurs automatically before the charging process begins, ensuring alignment is established without requiring subsequent manual adjustment
3Stability of the object's composition
If magnetic alignment assembly is added, then alignment stability is improved, but device complexity increases
Solution Approach 1:
The magnetic alignment assemblies are integrated and merged with the existing structural components of the charging devices. Rather than adding separate, independent alignment mechanisms, the magnetic elements are combined with the housing or coil support structures, thereby achieving stable alignment without proportionally increasing overall device complexity
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 magnetic alignment assembly ensures reliable and efficient alignment of inductive coils, maintaining optimal positioning even under jostling conditions, thereby improving wireless power transfer efficiency.
Implementation Method 1
a magnetic alignment assembly can include a main magnet (e.g., a square, rectangular, or cylindrical magnet having a particular width and thickness) with magnetic dipoles oriented along the axial direction and a ring magnet (e.g., an annular magnet having an inner diameter, an outer diameter, and thickness) coaxial with the main magnet
Implementation Method 2
An inductive transmitter coil disposed below the charging surface is driven with an alternating current that produces a time-varying magnetic flux that induces a current in a corresponding inductive receiver coil in the portable electronic device
Data Source
AI summary
A magnetic alignment assembly can be incorporated into an electronic device to facilitate alignment with another device. The magnetic alignment assembly can include a main magnet (e.g., a square or rectangular magnet) having a magnetic dipole in an axial direction and a ring magnet coaxial with the main magnet. The ring magnet can be smaller than the main magnet. The ring magnet can be positioned between the main magnet and an interface surface.