Movable Ferrite Frame for Wireless Power Coil Alignment
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Solution Overview
Problem
Existing wireless power transmission systems with fixed ferrite frames around coils have inefficient magnetic field distribution, leading to reduced efficiency when the coil deviates from a specific position, limiting the interlinkage of magnetic flux between the charger and battery areas.
Innovation Solution
A magnetic field distribution control apparatus that allows the ferrite frame to be movable within the coil, altering the magnetic field distribution by shifting its position, thereby adjusting the magnetic field direction and intensity according to the ferrite's movement, ensuring efficient interlinkage of magnetic flux regardless of the coil's position.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the ferrite frame is fixed around the coil, then the magnetic field distribution is stable and concentrated, but the efficiency deteriorates when the coil deviates from a given position
Solution Approach 1:
The patent makes the ferrite frame movable within the coil structure, transforming it from a static fixed component to a dynamic adjustable element. This allows the ferrite frame to be repositioned along the coil to maintain optimal magnetic field concentration even when the coil's position varies, thereby resolving the contradiction between magnetic field stability and position adaptability
2Reliability
If the ferrite is airtightly located inside the coil, then the magnetic field is concentrated over the ferrite, but the system loses flexibility when the coil position deviates
Solution Approach 1:
The patent introduces a movable ferrite frame that can be adjusted within the coil structure. This dynamic configuration allows the system to maintain tight magnetic field concentration by repositioning the ferrite frame to match the coil's actual position, thereby achieving both magnetic field concentration and operational flexibility
3Productivity
If the magnetic field has a fixed direction with fixed ferrite, then the transmission efficiency is high at a given position, but the efficiency deteriorates when the coil deviates from that position
Solution Approach 1:
The movable ferrite frame allows the magnetic field direction to be dynamically adjusted by repositioning the ferrite within the coil. This ensures that the magnetic field maintains its optimal concentration and directionality regardless of the coil's position, thereby maintaining high transmission efficiency across different positions
Solution Approach 2:
The patent changes the position parameter of the ferrite frame relative to the coil, allowing the magnetic field distribution parameters to be adjusted dynamically. This parameter adjustment ensures optimal magnetic coupling and transmission efficiency even when the coil position varies
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 solution enhances the efficiency of wireless power transmission by allowing for a consistent and adaptable magnetic field distribution, ensuring effective charging even when the coil deviates from a fixed position, and enabling the interlinkage of a large amount of magnetic flux with the coil on the rod portion.
Implementation Method 1
The ferrite is a substance which is largely used for wireless power transmission because it increases the size of a magnetic field and the inductance value of a coil
Implementation Method 2
wireless power transmission is a technology which converts electrical energy into magnetic energy and transmits electric power without electric wires. Such a method transmits electric power based on electromotive force induced in a coil in a rod portion (e.g., battery) area, and this electromotive force is proportional to a magnetic flux interlinked with the coil
Data Source
AI summary
A magnetic field distribution control apparatus includes a rod portion, a coil disposed at one side of an upper surface of the rod portion, and a ferrite movably disposed within the coil and configured to produce a magnetic field.