Wireless Power Transmitter Coil Structure for Multi-Mode Charging
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Solution Overview
Problem
Existing wireless power transmitters are limited in compatibility, as they can only charge receivers that support the same mode and standard, leading to issues with interoperability between inductive and resonant modes, as well as different standards like WPC and A4WP, which increases costs and burdens for users who need multiple transmitters for various devices.
Innovation Solution
A resonator coil structure is designed with a combination of coils for both inductive and resonant modes, allowing it to support multiple standards and ensuring uniform magnetic field distribution, comprising a first coil with a specific wire arrangement and sub-coils stacked on a ferrite plate, enabling efficient power transmission across various receivers regardless of their mode or standard.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a wireless power transmitter is designed to support only one mode (inductive or resonant) and one standard, then the device complexity is reduced, but the adaptability to different receivers deteriorates
Solution Approach 1:
The patent combines both inductive and resonant mode coils into a single integrated coil structure. The first coil is configured for inductive mode operation while the second coil is configured for resonant mode operation, allowing a single transmitter to support multiple charging modes and standards without requiring separate transmitter devices
Solution Approach 2:
The integrated coil structure is designed to perform multiple functions by supporting both inductive and resonant power transmission modes within a single device. The controller can selectively activate either the first coil or the second coil depending on the receiver type, making the transmitter universal and compatible with various standards (WPC, A4WP, etc.)
2Adaptability or versatility
If separate transmitters are provided for different modes and standards, then the adaptability is improved, but the device complexity and user burden increase
Solution Approach 1:
The patent merges the functionality of multiple separate transmitters (inductive mode transmitter and resonant mode transmitter) into a single integrated device. By incorporating both coil structures and enabling the controller to switch between modes, the system eliminates the need for users to carry or manage multiple transmitter devices for different charging standards
3Adaptability or versatility
If coils are configured for specific modes only, then the manufacturing precision requirements are reduced, but the adaptability deteriorates
Solution Approach 1:
The coil structure is segmented into distinct functional components: the first coil for inductive mode and the second coil for resonant mode. Each coil is independently configured with specific parameters (turns, dimensions, positioning) optimized for its designated mode, while the integrated structure allows the system to adapt to multiple standards without compromising manufacturing precision for either mode
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 enhances compatibility by allowing a single transmitter to charge receivers of different modes and standards, improves charging area uniformity, reduces impedance variation, and increases efficiency, resulting in a more versatile and cost-effective wireless charging system.
Implementation Method 1
The electromagnetic induction scheme is a scheme that generates a magnetic field through a power transmission coil (primary coil) in a power transmitting unit and locates a reception coil (secondary coil) at a position where current may be induced to transfer power
Implementation Method 2
The resonance scheme is a scheme that transmits energy by using a resonance phenomenon between the transmission coil and the reception coil
Data Source
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AI summary
According to an embodiment of the present invention, a resonator transmitting power in a resonant mode includes: a first coil having a wire group including three wires arranged in line and alternately extended in first direction and second direction orthogonal to the first direction; and a second coil including three sub-coils and ferrite plates, and the first coil may be stacked adjacent to the second coil, and the first coil may correspond to a resonance coil driven in the resonance mode and the second coil may correspond to an induction coil driven in an induction mode, respectively.