Wireless Power Transmitter Magnetic Coupler Misalignment Compensation
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Solution Overview
Problem
Existing wireless power transfer systems face inefficiencies when the transmitter and receiver devices are misaligned, as they cannot compensate for offset positions without increasing the size of the devices.
Innovation Solution
Incorporating a magnetic coupler with multiple coils arranged in various directions and variable capacitors, which are adjusted by a resonance frequency adjuster to optimize the magnetic field distribution based on the position and direction of the receiver device, allowing for improved transfer efficiency without increasing device size.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If the size of driving coils or auxiliary coils is increased to enhance transfer efficiency, then transfer efficiency along linear distance improves, but device volume increases and misalignment compensation capability remains lacking
Solution Approach 1:
The magnetic coupler is divided into multiple coils (first coil, second coil, third coil, fourth coil) arranged in different spatial orientations. Each coil segment handles specific directional coupling, allowing the system to maintain compact size while achieving omnidirectional power transfer capability and compensating for misalignment without requiring larger single coils.
Solution Approach 2:
The patent introduces spatial dimensionality by arranging coils in multiple orientations (horizontal, vertical, radial directions) rather than using a single large coil. This multi-dimensional coil arrangement enables the system to compensate for misalignment in any direction while maintaining a compact device footprint.
2Loss of energy
If additional auxiliary coils are inserted between driving coils to improve transfer efficiency, then linear distance efficiency increases, but device complexity increases and misalignment offset compensation is still not achieved
Solution Approach 1:
The magnetic coupler integrates multiple coils (first, second, third, and fourth coils) into a single unified component structure. This merging approach achieves misalignment compensation and omnidirectional coupling capabilities without requiring separate auxiliary coil assemblies, thereby reducing device complexity while maintaining high transfer efficiency.
3Loss of energy
If larger driving coils are used to compensate for misalignment, then transfer efficiency in misaligned state improves, but device size increases
Solution Approach 1:
Different coils within the magnetic coupler are optimized for specific directional coupling needs. The first and second coils handle horizontal方向的 coupling, while the third and fourth coils handle vertical方向的 coupling. This local optimization allows each coil to be compact while the collective system provides omnidirectional misalignment compensation.
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 power transfer efficiency even with misalignment by modifying resonance frequencies to compensate for offset positions, preventing transfer null points and maintaining device size.
Implementation Method 1
a driving coil configured to transmit power wirelessly
Implementation Method 2
a magnetic coupler mutually inductively coupled with the driving coil
Implementation Method 3
a resonance frequency adjuster part configured to adjust the resonance frequency of the magnetic coupler
Data Source
Figure 1
Figure 2
Figure 3~4
AI summary
The present invention relates to a wireless power transmitter device (100), a wireless power receiver device (200), and a system (1) for transferring power wirelessly. A wireless power transmitter device (100) according to an embodiment of the invention can include: a driving coil (110) configured to transmit power wirelessly; a magnetic coupler (120) mutually inductively coupled with the driving coil (110); and a resonance frequency adjuster part (130) configured to adjust the resonance frequency of the magnetic coupler (120), where the magnetic coupler can include a multiple number of coils arranged in a region opposite one side of the driving coil (110).