Wireless Power Receiver: Abnormal State Detection Solution
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Summary
Problems
Existing wireless power supply systems face challenges in detecting abnormal states, such as foreign objects or misalignment between transmission and reception coils, which lead to power loss and heating issues, requiring a more precise and self-sufficient detection mechanism.
Innovation solutions
A control circuit within the wireless power receiving apparatus that includes an electric power detection unit, a control unit, and an abnormal state judgment unit, allowing the apparatus to detect abnormal states based on received electric power and past states without comparing transmitted and received power, with adjustable threshold values and communication for error handling.
TRIZ Analysis
Specific contradictions:
General conflict description:
Principle concept:
If foreign object detection is performed by comparing transmitted and received power, then detection capability is provided, but the system requires high precision measurement of absolute power values and complex coordination between transmission and reception apparatus
Why choose this principle:
The power receiving apparatus independently performs abnormal state detection by monitoring changes in received power during power reception, without requiring coordination with or data from the power transmission apparatus. The control circuit detects abnormal states autonomously based on power changes exceeding a threshold, eliminating the need for complex inter-apparatus communication and high-precision absolute power measurement.
Principle concept:
If foreign object detection is performed by comparing transmitted and received power, then detection capability is provided, but the system requires high precision measurement of absolute power values and complex coordination between transmission and reception apparatus
Why choose this principle:
The foreign object detection function is extracted from the transmission apparatus and relocated to the reception apparatus. This separates the detection responsibility from the transmission side, allowing the reception apparatus to independently monitor its own power reception status and detect abnormalities without relying on transmitted power data or complex system-wide coordination.
Application Domain
Data Source
AI summary:
A control circuit within the wireless power receiving apparatus that includes an electric power detection unit, a control unit, and an abnormal state judgment unit, allowing the apparatus to detect abnormal states based on received electric power and past states without comparing transmitted and received power, with adjustable threshold values and communication for error handling.
Abstract
A control circuit 400 is employed for controlling a wireless power receiving apparatus 300 that receives an electric power signal from a wireless power transmission apparatus. An electric power detection unit 402 detects the received electric power PRX received by the wireless power receiving apparatus 300. A control unit 404 generates a control signal CE for controlling the electric power PTX to be transmitted by the wireless power transmission apparatus. When the received electric power PRX detected by the electric power detection unit 402 falls despite the control signal CE not indicating an instruction to lower the electric power PTX to be transmitted, an abnormal state judgment unit 406 judges that an abnormal state has occurred.