Switchable Coil Device for Wireless Power Transmission
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current wireless charging technologies face inefficiencies in power transmission due to alignment and distance issues between wireless Power Transmission Units (PTUs) and Power Receiving Units (PRUs), and lack of accessories that can effectively mediate wireless power transfer between devices.
Innovation Solution
A coil device with multiple coils and a logic circuit that adjusts inductance settings to optimize power transfer, and an accessory device with integrated coils and a circuit unit to control switch connections, allowing for efficient wireless power transmission and reception between electronic devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If a single coil configuration is used for wireless power transmission, then the device structure is simple, but power transmission efficiency decreases due to alignment and distance issues between PTUs and PRUs
Solution Approach 1:
The wireless power transmission system is divided into multiple independent coil units (first coil, second coil, third coil) that can be selectively connected. Each coil can be independently controlled to optimize power transmission based on alignment and distance conditions, thereby improving overall power transmission efficiency while maintaining manageable structural complexity through modular design.
Solution Approach 2:
The coil configuration is made dynamic through switchable connections controlled by a logic circuit. The system can dynamically select which coils to connect based on real-time alignment and distance conditions between PTUs and PRUs, enabling adaptive optimization of power transmission efficiency without requiring a permanently complex structure.
2Productivity
If multiple coils are used to improve power transmission efficiency, then power transfer optimization is achieved, but device complexity increases
Solution Approach 1:
The multiple coils are designed with universal functionality where each coil can serve different purposes depending on connection configuration. The first coil can be connected to either the second or third coil based on operational requirements, allowing a single coil structure to perform multiple functions and thereby improving power transfer efficiency without proportionally increasing overall device complexity.
Solution Approach 2:
The switch connections and logic circuit are pre-configured to enable rapid switching between different coil configurations. This preliminary setup allows the system to quickly adapt to different power transmission scenarios without requiring complex real-time decision-making, thus improving power transfer efficiency while keeping the control system manageable.
3Adaptability or versatility
If fixed coil connections are used, then the device structure is simple, but adaptability to different charging scenarios is limited
Solution Approach 1:
The coil connections are made dynamic and reconfigurable through switches controlled by a logic circuit. The system can adapt between different charging scenarios (such as different device sizes, positions, and power requirements) by dynamically selecting which coils to connect, thereby improving versatility without requiring a permanently complex structure.
Solution Approach 2:
The system changes operational parameters by switching between different coil configurations. By altering which coils are connected and how they are arranged, the system can adapt to various charging scenarios and optimize performance for different conditions, achieving high versatility through parameter variation rather than structural complexity.
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
Enhances wireless power transmission efficiency by optimizing coil connections based on received signals, enabling effective charging of devices and power transfer between PTUs and PRUs, as well as between multiple electronic devices.
Implementation Method 1
Wireless charging technology generally uses wireless power transmission and reception, and may refer to, for example, a system in which the battery of an electronic device can be automatically charged by simply placing the electronic device on a rechargeable pad without connecting the electronic device to a separate (i.e., wired) charging connector. Wireless charging technology includes, for example, an electromagnetic induction scheme using a coil
Implementation Method 2
Wireless charging technology includes, for example, an electromagnetic induction scheme using a coil, a resonance scheme using resonance
Data Source
AI summary
A coil device for transmitting wireless power includes at least one switch, a first coil, a second coil configured to be physically connected to the first coil through the at least one switch, a third coil configured to be physically connected to the first coil through the at least one switch, and a logic circuit configured to control the at least one switch. In a first mode, the logic circuit is configured to control the at least one switch so that an inductance of the first coil is a first inductance and control the at least one switch so that the first coil and the second coil are connected to each other and the first coil and the third coil are not connected to each other. In a second mode, the logic circuit is configured to control the at least one switch so that the inductance of the first coil is a second inductance and control the at least one switch so that the first coil and the third coil are connected to each other and the first coil and the second coil are not connected to each other.