Wireless Charging Coil Resonator Array for Magnetic Flux Convergence
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Solution Overview
Problem
Current wireless charging systems suffer from inefficient magnetic flux distribution, leading to poor charging efficiency and limited charging distance due to divergent magnetic fields.
Innovation Solution
Incorporation of a magnetic field convergence device with a resonator array, including split ring resonators or spiral coil arrays, to create a negative or zero refractive index medium, which enhances magnetic flux directionality and increases charging efficiency by concentrating the magnetic field.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If traditional transmitting and receiving coils are used without magnetic field convergence devices, then the device structure is simple, but the magnetic flux distribution is divergent leading to poor charging efficiency and limited charging distance
Solution Approach 1:
The patent introduces a magnetic field convergence device as an intermediary component between the transmitting coil and receiving coil. This device includes resonators (such as split-ring resonators or spiral resonators) that act as a mediator to reshape and concentrate the magnetic field, transforming the divergent magnetic flux into a more focused distribution pattern that improves charging efficiency without requiring direct close contact between coils
Solution Approach 2:
The patent changes the physical parameters of the magnetic field by using resonators tuned to specific frequencies. The resonators are designed with specific dimensions and geometries that resonate at the operating frequency, thereby altering the magnetic field's spatial distribution characteristics. This parameter change enables the magnetic field to maintain higher intensity over greater distances, improving both charging efficiency and charging distance
2Length of stationary object
If traditional coils are used without magnetic field convergence, then the device structure is simple, but the charging distance is limited due to divergent magnetic fields
Solution Approach 1:
The magnetic field convergence device serves as an intermediary that extends the effective range of the magnetic field. The resonators in this device capture and redirect magnetic flux that would otherwise diverge and dissipate, effectively acting as a magnetic field guide that maintains field intensity over longer distances, thereby increasing charging distance
Solution Approach 2:
The resonators in the magnetic field convergence device operate through periodic oscillation at their resonant frequency. This periodic action creates a sustained and reinforced magnetic field pattern that propagates more effectively through space, allowing the magnetic field to maintain useful intensity over greater distances compared to non-resonant coils
3Productivity
If traditional wireless charging system is used, then the device structure is simple, but the magnetic flux distribution is not uniform leading to poor charging efficiency
Solution Approach 1:
The magnetic field convergence device acts as an intermediary that corrects the non-uniform magnetic flux distribution. The array of resonators is strategically positioned and oriented to collectively reshape the magnetic field, creating a more uniform flux distribution pattern across the charging surface, which ensures consistent charging performance across different positions
Solution Approach 2:
The magnetic field convergence device is segmented into multiple individual resonators arranged in an array. Each resonator independently contributes to shaping the magnetic field, and their collective action creates a uniform overall distribution. This segmentation allows for precise control and adjustment of the magnetic field characteristics across different spatial regions
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 significantly improves charging efficiency and extends the charging distance by ensuring a uniform magnetic field distribution, allowing for more flexible placement of charging devices and increased power transfer capabilities.
Implementation Method 1
The medium with negative or zero refractive index can be formed by resonance
Implementation Method 2
The medium with negative or zero refractive index can be formed by resonance
Implementation Method 3
the current induced in the receiving coil charges the battery installed in the device
Implementation Method 4
the current induced in the receiving coil according to Faraday's law
Data Source
AI summary
A wireless charging device includes a wireless communication device configurated in the wireless charging device to communicate with an electric vehicle. At least one transmitting coil is connected to a power supply to wirelessly charge the electric vehicle, and at least one resonant coil is configurated in front of the at least one transmitting coil to form a negative or zero refractive index medium by resonance.