Wireless Power Charging Control With Time-Slot NFC Communication
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Solution Overview
Problem
Existing wireless power transmission technologies face challenges in simultaneously performing wireless communication and power transmission without damaging communication circuits when coils and communication modules are adjacent.
Innovation Solution
A wireless power transmission apparatus with a processor-controlled system that periodically transmits power and acquires control information from an electronic device, adjusting power transmission based on this information to prevent damage to communication circuits.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If wireless power is transmitted through a coil adjacent to a communication circuit, then wireless power transmission capability is improved, but the communication circuit may be damaged by electromagnetic interference
Solution Approach 1:
The system alternates between power transmission mode and communication mode in periodic time slots. During power transmission, the coil transmits wireless power; during communication slots, power transmission is suspended to allow safe NFC communication. This periodic switching resolves the contradiction by separating the two functions in time, preventing damage to the communication circuit while maintaining both capabilities.
Solution Approach 2:
The system dynamically adjusts its operating state based on real-time conditions. The processor monitors whether an electronic device is present and actively switches between power transmission and communication modes. This dynamic adaptation allows the system to optimize power transmission when needed while protecting the communication circuit during vulnerable periods.
2Productivity
If power transmission is continuous, then power delivery efficiency is improved, but communication operations cannot be performed during power transmission
Solution Approach 1:
The system implements periodic time-slot allocation where power transmission and communication operations alternate. During dedicated power transmission slots, full power is delivered efficiently; during communication slots, the system suspends power transmission to enable safe NFC operations. This periodic structure balances productivity and ease of operation by ensuring both functions can execute effectively in their designated time windows.
Solution Approach 2:
The system maintains continuous useful action by rapidly alternating between power transmission and communication modes, ensuring that both functions are continuously served over time. The processor manages seamless transitions between modes, so that from a system-level perspective, both power delivery and communication operations continue without interruption, even though they cannot occur simultaneously.
3Device complexity
If communication and power transmission share the same physical space, then device complexity is reduced, but electromagnetic interference between components increases
Solution Approach 1:
The system uses periodic time-slot switching to manage electromagnetic interference while maintaining physical integration. The processor alternates between power transmission mode (activating the coil) and communication mode (activating the NFC circuit), ensuring that only one component is active at any given time. This temporal separation eliminates electromagnetic interference between the coil and communication circuit while allowing both to coexist in the same physical device, thus reducing overall device complexity.
Solution Approach 2:
The processor acts as an intermediary controller that manages the interaction between the power transmission coil and communication circuit. It coordinates their operations by suspending power transmission during communication slots and vice versa, preventing direct electromagnetic interference while allowing both subsystems to function within the integrated device structure.
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
Enables smooth wireless communication and power transmission while reducing damage to communication circuits due to adjacent power coils and communication modules.
Implementation Method 1
Wireless power transmission technologies include a magnetic induction method using a magnetic induction phenomenon between primary coils and secondary coils
Implementation Method 2
an antenna configured to transmit a sensing signal for sensing the second communication module
Data Source
AI summary
An example wireless power transmission apparatus includes a plate; a first communication module configured to perform wireless communication with an electronic device positioned on the plate; a power transmitting coil configured to transmit wireless power to the electronic device; a driving circuit configured to apply a current to the power transmitting coil; and a processor electrically connected to the first communication module, and the driving circuit. The processor is configured to control the driving circuit to periodically transmit the wireless power through the power transmitting coil, control the first communication module to acquire control information stored in a second communication module of the electronic device for a first time period during which transmission of the wireless power is stopped, and control the driving circuit to adjust the wireless power based on the control information.