Wireless Power Transmitter Authentication for Multiple Receivers
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Solution Overview
Problem
Existing wireless power transmission systems lack appropriate control methods for managing multiple power receiving apparatuses and authentication with multiple power transmitters, leading to potential authentication failures and unstable power transmission.
Innovation Solution
A power transmission apparatus with multiple transmitters and receivers employs a second transmission unit to transmit a different signal for authentication information when a first unit receives a request, ensuring synchronized and stable power transmission by verifying the authenticity of multiple receivers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a single transmission unit is used for wireless power transmission, then the device complexity is reduced, but the authentication reliability with multiple power receiving apparatuses deteriorates
Solution Approach 1:
The power transmission apparatus is divided into multiple transmission units (first transmission unit and second transmission unit), each capable of independently performing wireless power transmission and authentication with different power receiving apparatuses. This segmentation allows parallel authentication processes, improving reliability without requiring a single complex centralized unit.
2Productivity
If multiple transmission units operate simultaneously, then the power transmission productivity is improved, but the authentication control difficulty increases
Solution Approach 1:
The system performs preliminary actions by having transmission units send authentication requests in advance before power transmission begins. The first transmission unit and second transmission unit can initiate authentication sequences beforehand, ensuring that authentication is completed before actual power delivery, thus managing control complexity while maintaining high productivity.
Solution Approach 2:
The system implements feedback mechanisms where transmission units monitor authentication status and power reception status in real-time. Based on feedback from power receiving apparatuses (authentication responses and power reception confirmations), the control unit adjusts the operation of transmission units to ensure proper authentication control while maintaining efficient power transmission.
3Speed
If authentication requests are sent without coordination, then the authentication speed is improved, but the authentication reliability deteriorates due to signal interference
Solution Approach 1:
The control unit coordinates authentication requests by having transmission units send authentication information in advance before simultaneous power transmission begins. This preliminary authentication phase allows the system to establish secure connections without the interference that would occur during simultaneous high-power transmission, thus maintaining both speed and reliability.
Solution Approach 2:
The system uses periodic action by separating authentication operations from power transmission operations in time. Authentication is performed in distinct periodic phases before or between power transmission cycles, preventing signal interference while maintaining efficient authentication speed through structured timing.
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 effective authentication and stable power transmission among multiple receivers, even in the presence of positional shifts or vibrations, by using a secondary transmission unit to manage authentication signals effectively.
Implementation Method 1
a first transmission unit configured to wirelessly transmit power to a power receiving apparatus, and a second transmission unit configured to wirelessly transmit power to a power receiving apparatus
Data Source
AI summary
A power transmission apparatus 200 includes a first power transmitter 207a configured to wirelessly transmit power to a first power receiving apparatus 400a, and a second power transmitter 207b configured to wirelessly transmit power to a second power receiving apparatus 400b. In a case where the second power transmitter 207b receives a request for transmission of information regarding an electronic certificate from the second power receiving apparatus 400b before the first power transmitter 207a receives the request for transmission of information regarding the electronic certificate from the first power receiving apparatus 400a and the first power transmitter 207a transmits the information regarding the electronic certificate, the second power transmitter 207b transmits a signal (BUSY) different from the information regarding the electronic certificate.