Wireless Power Transmitter NFC Antenna Interference Protection
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Wireless power transmitters can inadvertently damage communication antennas by transmitting electromagnetic waves that are absorbed, leading to degradation or destruction of these components.
Innovation Solution
A wireless power transmitter and receiver system that includes a Near-Field Communication (NFC) antenna and a controller to detect the presence of NFC tags or other communication antennas, preventing electromagnetic wave absorption by stopping power transmission when such devices are detected nearby.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If wireless power transmission is performed using electromagnetic waves, then power can be transmitted wirelessly to charging devices, but communication antennas may absorb these electromagnetic waves causing degradation or destruction
Solution Approach 1:
The system performs preliminary detection of communication antennas in the vicinity before initiating wireless power transmission. By detecting the presence of NFC tags or other communication antennas first, the system can prevent electromagnetic wave transmission that would otherwise damage these antennas, thus resolving the contradiction between enabling wireless charging and protecting communication antennas
2Use of energy by moving object
If electromagnetic waves are transmitted for power delivery, then power transmission efficiency is improved, but surrounding communication devices may be affected by the electromagnetic waves
Solution Approach 1:
The system uses feedback from detection results to control the power transmission process. By continuously monitoring for the presence of communication antennas and adjusting transmission accordingly, the system maintains efficient power transmission while preventing harmful electromagnetic wave interference with surrounding devices
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
Prevents electromagnetic interference with communication antennas, ensuring their integrity and functionality during wireless charging operations.
Implementation Method 1
a system has been developed in which power is wirelessly transmitted over a distance of several tens of meters by using microwaves... the resonance scheme using resonance... An electromagnetic wave containing electrical energy was caused to resonate
Implementation Method 2
The wireless charging technology uses wireless power transmission and reception... a system in which a battery is automatically charged if the battery is just put on a charging pad... uses a coil... When a magnet approaches the coil, an induced current is generated
Data Source
Figure 1~2
Figure 3a
Figure 3b
AI summary
A wireless power transmitter, a wireless power receiver, and control methods thereof are provided. The wireless power transmitter includes a Near-Field Communication (NFC) antenna for NFC, a power supply, a NFC module, a resonator that wirelessly transmits power to a wireless power receiver, and a controller that controls the power supply to apply a beacon power for detecting an impedance change that is caused by placement of the wireless power receiver on the wireless power transmitter, to the resonator during a first time period, and controls the NFC module to apply NFC tag detection power to the NFC antenna during a second time period.