Wireless Power Feeding Master Device Selection
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Solution Overview
Problem
In wireless power feeding systems with multiple power transmission devices, radio interference occurs when devices simultaneously transmit power to overlapping areas, leading to reduced efficiency and ineffective power distribution, with issues such as suboptimal master device selection, excessive information transfer, and wasteful communication.
Innovation Solution
A method to determine a more capable power transmission device as the master within the system, minimizing interference by selecting based on criteria like communication range, throughput, and location, to efficiently manage power distribution and reduce unnecessary information exchange.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If multiple power transmission devices simultaneously transmit power to overlapping areas, then power coverage is improved, but radio interference occurs and power feeding efficiency deteriorates
Solution Approach 1:
The patent introduces a master device as an intermediary that coordinates and manages multiple power transmission devices. The master device receives power reception device information from all devices, determines which devices should transmit power to which reception devices, and transmits control information to prevent simultaneous transmission to the same area, thereby eliminating radio interference while maintaining comprehensive power coverage
Solution Approach 2:
The patent changes the operational parameters of power transmission devices dynamically. The master device adjusts transmission parameters by selectively enabling or disabling power transmission from different devices based on real-time conditions, ensuring that only appropriate devices transmit power to specific reception devices, thus avoiding interference while maintaining efficient power delivery
2Ease of operation
If any power transmission device is selected as master, then system control is established, but suboptimal master selection reduces overall system performance
Solution Approach 1:
The patent changes the selection criterion for the master device from arbitrary selection to capability-based selection. Devices evaluate their own capabilities (communication range, throughput, location) and compare with others, then the device with superior capabilities becomes the master. This ensures the master device has the necessary performance to efficiently manage the system, improving overall productivity while maintaining control capability
3Reliability
If all power transmission devices exchange complete information, then system coordination is improved, but communication overhead and information transfer increase
Solution Approach 1:
The patent extracts the information management function from all devices and concentrates it in the master device. Only the master device maintains complete information about power reception devices and transmits control information to appropriate devices. Other devices transmit only their basic information to the master, significantly reducing communication overhead while the master ensures reliable system coordination through centralized information management
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 enables efficient power transmission by selecting the most capable device as the master, reducing interference and optimizing system performance, while minimizing communication overhead and ensuring all devices can transmit power effectively without radio interference.
Implementation Method 1
the magnetic field resonance system has come to draw attention which features a capability of sufficient electric power transmission and a long power transmission distance
Implementation Method 2
a communication unit configured to perform communication with the power reception device or the at least one other power transmission device
Data Source
AI summary
A method of determining a power transmission device to be set as a master device such that wasteful communication is not caused. In a wireless power feeding system, a power transmission device that transmits electric power to a power reception device forms a group with other power transmission devices. The power transmission device performs communication with the power reception device or the other power transmission devices using a wireless transmission section and a wireless reception section, and exchanges information with the other power transmission devices. The power transmission device receives a setting for determining a power transmission device to be set as a master device out of the self device and the other power transmission devices, with which information has been exchanged. If the received setting is for setting the self device as the master device, the self device is set as the master device.