Multi-Coil Wireless Power Antenna for Receiver Position Freedom
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Solution Overview
Problem
Existing contactless power supply technologies face limitations in user experience due to restricted positional freedom of the power receiver, which affects the alignment and efficiency of wireless power transmission between the power transmitting and receiving antennas.
Innovation Solution
A power transmitting device with a plurality of transmitting coils, where each coil has a coplanar setting with axes perpendicular to the antenna and forming predetermined angles with each other, enhancing electromagnetic coupling and positional freedom for improved power transmission efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a single transmitting coil is used in the power transmitting antenna, then the device structure is simple, but the power receiver has limited positional freedom and alignment efficiency is reduced
Solution Approach 1:
The power transmitting antenna is divided into multiple transmitting coils (first, second, third, and fourth coils) arranged in different spatial orientations. Each coil is independently configured to transmit electromagnetic signals, enabling the system to serve power receivers at various positions and orientations through selective coil activation or combined operation.
Solution Approach 2:
The transmitting coils are arranged in three-dimensional space with different orientations (e.g., first coil in horizontal plane, second coil in vertical plane, third and fourth coils in other orientations). This spatial distribution across multiple dimensions allows the power receiver to be positioned freely in space while maintaining efficient electromagnetic coupling with at least one transmitting coil.
2Productivity
If multiple transmitting coils with different orientations are used, then positional freedom and transmission efficiency are improved, but the device complexity increases
Solution Approach 1:
Each transmitting coil is designed with specific local characteristics including different orientations, sizes, and positions. The first coil may be larger and in the horizontal plane, while the second coil is in the vertical plane, and the third and fourth coils have different configurations. This local differentiation allows each coil to optimize power transmission to receivers in specific spatial zones.
Solution Approach 2:
The multiple transmitting coils collectively provide universal power transmission capability in all spatial directions. By configuring coils in different orientations and planes, the system can efficiently transmit power to receivers regardless of their position or orientation, making the power transmitting antenna universally applicable to various receiver configurations.
3Ease of operation
If transmitting coils are arranged in a single plane, then manufacturing is simple, but the power receiver's orientational freedom is restricted
Solution Approach 1:
The transmitting coils extend from a two-dimensional plane arrangement into three-dimensional space. The first and second coils are arranged in different planes (horizontal and vertical), while the third and fourth coils are positioned and oriented to provide coverage in additional spatial dimensions. This three-dimensional arrangement allows power receivers to be freely oriented in space while maintaining efficient coupling.
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 configuration enhances the degree of freedom for the power receiver, ensuring efficient power transmission regardless of its orientation relative to the power transmitting antenna, thereby improving user experience and transmission efficiency.
Implementation Method 1
a coupling circuit can include a power transmitting antenna and a power receiving antenna. The power transmitting antenna and other components in a power transmitter may form a transmitter-side resonant circuit, and the power receiving antenna and other components in a power receiver may form a receiver-side resonant circuit. Electric energy can be transferred in a contactless manner when the transmitter-side resonant circuit and the receiver-side resonant circuit have the same resonance frequency. The receiver-side resonant circuit can be coupled to the transmitter-side resonant circuit via electromagnetic field
Implementation Method 2
A power transmitting device with a plurality of transmitting coils, where each coil has a coplanar setting with axes perpendicular to the antenna and forming predetermined angles with each other, enhancing electromagnetic coupling and positional freedom for improved power transmission efficiency
Data Source
AI summary
A power transmitting device for a contactless power supply, can include: a power transmitting antenna having a plurality of transmitting coils; where each of the plurality of transmitting coils comprises a coil turn or a plurality of concentric coil turns with a substantially coplanar setting and having a coil surface; where an axis of each of the plurality of transmitting coils is axially perpendicular to the power transmitting antenna; and where the axis of each of the plurality of transmitting coils forms a predetermined angle with respect to each other.