Wireless Power Transmission Device Dynamic Subset Selection
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Solution Overview
Problem
Existing wireless power transmission systems face inefficiencies when multiple devices require power simultaneously, as they often lack sufficient power to serve all devices, leading to prolonged charging times and reduced performance, especially when power sources like USB interfaces are limited.
Innovation Solution
The system determines a subset of reception devices to prioritize based on predefined criteria such as priority levels, time of detection, and power requirements, adjusting the power allocation to ensure efficient and simultaneous charging of multiple devices by using a transmission device that can manage power levels and communication between devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If power is transmitted to multiple reception devices simultaneously, then the number of served devices increases, but the available power per device decreases
Solution Approach 1:
The system dynamically adjusts the operating parameters of the transmission device, specifically modifying the operating frequency based on feedback from reception devices. This allows optimization of power transfer efficiency under varying load conditions, enabling better power distribution across multiple devices
Solution Approach 2:
The patent implements a dynamic power management system that continuously monitors the state of multiple reception devices and adjusts power allocation in real-time. The transmission device can dynamically change which devices receive power and at what level, transitioning between different power distribution states based on current needs and available power
2Quantity of substance
If power is allocated to multiple reception devices, then more devices can be charged, but the charging time increases
Solution Approach 1:
The transmission device changes operating parameters including frequency adjustment based on communication with reception devices. This enables optimization of power transfer rates dynamically, allowing faster charging when possible and adapting to different device requirements
Solution Approach 2:
The system uses bidirectional communication between transmission and reception devices to exchange power transfer parameters and monitor charging status. This feedback mechanism allows the transmission device to adjust power allocation to minimize charging time while managing multiple devices efficiently
3Adaptability or versatility
If the transmission device serves multiple reception devices, then device versatility increases, but power management complexity increases
Solution Approach 1:
The transmission device is designed with multi-functionality to detect, communicate with, and power multiple different types of reception devices simultaneously. It can adapt to various device requirements through frequency adjustment and dynamic power allocation
Solution Approach 2:
The system enables reception devices to actively participate in power management by communicating their power needs and status. Devices can request power adjustments and provide feedback, reducing the burden on the transmission device and simplifying overall control
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 approach enhances user convenience by automatically managing device charging sequences and power distribution, optimizing charging times and performance across multiple devices, even with limited power sources, by prioritizing critical devices and adjusting power levels for efficient power utilization.
Implementation Method 1
Power transmission via magnetic induction is a well-known method, mostly applied in transformers, but is recently refined by integrating coils into printed circuit boards (PCBs) or other flat materials, enabling wireless power transmission from a surface to a reception device. For this purpose a power supply can be equipped with a transmitter that can generate an alternating magnetic field by means of an alternating electrical current in one or more coil(s) and a mobile device can be equipped with a reception device in which an alternating electrical voltage is induced in one or more coils by this magnetic field.
Data Source
Figure 1~2A
Figure 2B~2C
Figure 3A~3B
AI summary
This invention proposes a method of and a device for transmitting power via electromagnetic coupling from a transmission device to a set of reception devices, said method comprising a step of calculating by the transmission device, a first sum of given power levels defined by each reception device of said set of reception devices; if a maximum power that can be transmitted by the transmission device to said set of reception devices is less than said first sum, then performing a step of determining by said transmission device, based on said first sum and according to a set of criteria, a subset of reception devices among said set of reception devices, to which the transmission device transmits power.