Wireless Power Transmitter Low-Coupling Detection via HP DPING
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Solution Overview
Problem
Current wireless power transmission systems face limitations in wide interoperability, as they can only charge certain types of electronic devices with good coupling, and fail to detect low coupling with wireless power receivers, potentially damaging foreign objects with insufficient power signal adjustments.
Innovation Solution
The system employs a Q-Factor measurement to determine coupling, generating a higher power DPING signal only when the Q-Factor is within a defined range, ensuring safe transmission and preventing damage to foreign objects, while also improving compatibility with various devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the wireless power transmitter uses a standard power signal for detection, then the system maintains simple operation, but it fails to detect low coupling with wireless power receivers
Solution Approach 1:
The system dynamically adjusts the power signal characteristics based on detected coupling conditions. When low coupling is detected, the transmitter automatically increases power signal magnitude and modifies transmission parameters, transforming a static detection system into an adaptive one that responds to real-time coupling conditions
Solution Approach 2:
The invention changes key parameters of the power signal including magnitude, frequency, or temporal characteristics based on the detected coupling level. By modifying these parameters, the system enhances its ability to detect low coupling scenarios without requiring completely new detection hardware
2Measurement precision
If the wireless power transmitter increases power signal to compensate for low coupling, then detection capability improves, but foreign objects may be damaged by excessive power
Solution Approach 1:
The system continuously monitors the coupling condition and uses this feedback to adjust power signal levels in real-time. By measuring the response to initial power signals and detecting coupling characteristics, the transmitter can increase power only when appropriate coupling is confirmed, preventing foreign object damage
Solution Approach 2:
The transmitter performs preliminary detection using low-power signals before applying high-power transmission. This preliminary action allows the system to assess coupling conditions and determine whether subsequent high-power signals are safe to apply, preventing foreign object damage
Solution Approach 3:
The system takes preliminary measures to prevent potential harm by detecting coupling characteristics before applying full power. By identifying foreign objects or poor coupling conditions in advance, the system can avoid applying power levels that would cause damage
3Adaptability or versatility
If the wireless power transmitter charges only devices with good coupling, then the system maintains simple charging logic, but interoperability with various electronic devices is limited
Solution Approach 1:
The charging system dynamically adapts its transmission parameters based on the specific device being charged. By continuously monitoring coupling conditions and adjusting power signals in real-time, the system can accommodate various device types and positions without requiring pre-configuration or complex device-specific protocols
Solution Approach 2:
The invention creates a universal charging system that can handle multiple device types and coupling scenarios through a single adaptive control mechanism. The same detection and adjustment logic applies regardless of device type, position, or coupling quality, providing broad interoperability
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 enhances the system's ability to detect low coupling with wireless power receivers, ensuring safe and efficient charging of electronic devices while preventing damage to foreign objects, and improving interoperability with different types of electronic devices.
Implementation Method 1
A voltage or current applied to the transmitter coil generates a power signal in the form of a magnetic flux which couples with the wireless power receiver
Data Source
AI summary
A wireless power transmitter to wirelessly transmit power applies a current or voltage to a transmitter coil based on an indication of coupling being in a predetermined range. The current or voltage which is applied causes the transmitter coil to transmit a high power (HP) DPING. A response to the HP DPING indicates that a wireless power receiver is located on a charging surface and a power signal is then transmitted to the wireless power receiver to charge or power an electronic device coupled to the wireless power receiver. Use of HP DPING improves the wireless power transmission performance including transmission area and interoperability of wireless power transmitters with low coupling to wireless power receivers.