Wireless Power Coil Configurations for Coupling Efficiency
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Solution Overview
Problem
Existing wireless power systems face inefficiencies in wireless power transfer due to suboptimal coupling between transmitting and receiving coils, which affects the convenience and effectiveness of charging portable electronic devices.
Innovation Solution
The use of specific coil configurations such as solenoid arrays, pot core coils, and figure eight coils with magnetic cores and alignment structures to enhance coupling efficiency, along with control circuitry for phase and magnitude adjustments of coil drive signals, facilitates efficient wireless power transfer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If conventional coil configurations are used in wireless power systems, then device complexity is reduced, but wireless power transfer efficiency deteriorates due to suboptimal coupling between transmitting and receiving coils
Solution Approach 1:
The transmitting device divides the coil system into multiple independent coils (first coil and second coil) that can be independently controlled. The receiving device similarly uses multiple coils (third coil and fourth coil). This segmentation allows selective activation of coil pairs based on coupling quality, improving overall power transfer efficiency while managing complexity through modular architecture.
Solution Approach 2:
The system dynamically switches between different coil pairs based on real-time coupling conditions. The controller monitors power transfer efficiency and selectively activates either the first transmitting coil with third receiving coil or the second transmitting coil with fourth receiving coil. This dynamic adaptation optimizes wireless power transfer efficiency without requiring a permanently complex coil configuration.
2Productivity
If multiple coil pairs are used with switching control, then wireless power transfer efficiency is improved, but device complexity increases
Solution Approach 1:
The controller serves multiple functions: it monitors power transfer efficiency, determines coupling quality, selects appropriate coil pairs, and switches between different transmitting-receiving coil combinations. This multi-functionality consolidates control logic into a single component, improving charging effectiveness while minimizing the increase in device complexity through functional integration.
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 improves the efficiency of wireless power transfer, allowing for effective charging of portable devices and powering of their components, while also enabling in-band data communication during power transmission.
Implementation Method 1
Coils in the power transmitting and receiving devices are used to transmit and receive wireless power signals
Implementation Method 2
magnets and other alignment structures in the transmitting and receiving devices help align coils in the transmitting and receiving devices
Data Source
AI summary
A power system has a wireless power transmitting device and a wireless power receiving device. Coils in the power transmitting and receiving devices are used to transmit and receive wireless power signals. The coils may include pot core coils, figure eight coils, solenoids, and other coils. A solenoid array may extend under a charging surface in a wireless power transmitting device. Solenoids in the array may be separated from each other by small gaps. Solenoids may have rectangular outlines, hexagonal outlines, or other shapes. Pot core coils may have a magnetic material with a circular groove of a groove of other suitable shapes that contains wire windings. Figure eight coils may have first and second adjacent magnetic cores with respective counterclockwise and clockwise wire windings. Magnets and other alignment structures can be used to help align coils in transmitting and receiving devices.