Wireless Power Receiver Communication with Low-Speed Link Handoff
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Solution Overview
Problem
Existing wireless power transfer systems face challenges in efficiently transferring high-speed communication information between the receiver and transmitter, particularly as power levels increase.
Innovation Solution
The implementation of a method that establishes a low-speed communication link between the receiver and transmitter, allowing for the transfer of authentication data and enabling a high-speed communication request, which then facilitates high-speed communication, such as Wi-Fi, between the devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If wireless power transfer systems use traditional communication methods (Bluetooth, NFC) for data transfer, then the system can maintain simple architecture, but the data transfer speed is limited (1 Mbps for Bluetooth, 424 Kbps for NFC)
Solution Approach 1:
The wireless power transfer system is designed to perform multiple functions: power transfer and high-speed communication. The transmitter and receiver are equipped with both power transfer components (coils, rectifiers) and communication components (Wi-Fi modules), allowing the same physical system to handle both energy and data transmission simultaneously, achieving speeds up to 480 Mbps
Solution Approach 2:
The communication system is segmented into two distinct channels: a low-speed control channel for authentication and basic communication, and a high-speed data channel for bulk data transfer. This segmentation allows the system to optimize each channel for its specific purpose while maintaining overall system manageability
2Productivity
If the system establishes high-speed communication immediately upon power connection, then data transfer efficiency is improved, but authentication security and system reliability are compromised
Solution Approach 1:
The system performs authentication and device identification through low-speed communication before establishing the high-speed data transfer channel. This preliminary action ensures that only authorized devices can access the high-speed communication mode, maintaining security while enabling efficient data transfer once authentication is complete
Solution Approach 2:
Low-speed communication serves as an intermediary channel that mediates between the power connection event and the high-speed communication establishment. It handles authentication, device pairing, and connection management, acting as a secure gateway before activating the high-speed data channel
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 high-speed communication in wireless power transfer systems, improving data transfer speeds while maintaining reliable power transfer, and includes features for secure authentication and efficient disconnection processes.
Implementation Method 1
a rectifier configured to convert an alternating current voltage into a direct current voltage
Implementation Method 2
The primary side transmitter is magnetically coupled to the secondary side receiver through a magnetic coupling
Data Source
AI summary
An apparatus includes a rectifier coupled to a receiver coil, the receiver coil configured to be magnetically coupled to a transmitter coil of a wireless power transfer system, wherein the rectifier is configured to convert an alternating current voltage into a direct current voltage, a first communication apparatus configured to provide a low speed communication to a transmitter of the wireless power transfer system, and a second communication apparatus configured to provide a high-speed communication to the transmitter of the wireless power transfer system, wherein the high-speed communication provided by the second communication apparatus is enabled through the low speed communication provided by the first communication apparatus.