Wireless Power Transmitter: Rogue Object Detection Solution
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Summary
Problems
Current wireless charging technologies lack standards for wireless power transmitter/receiver selection, communication frequency, power adjustment, and error handling, particularly in determining if a rogue object is present on the transmitter.
Innovation solutions
A wireless power transmitter with a controller that determines latch fault mode entry conditions, allowing it to periodically apply specific power values to detect and manage rogue objects, ensuring efficient operation and user notification.
TRIZ Analysis
Specific contradictions:
General conflict description:
Principle concept:
If wireless power transmission is implemented without standardized protocols, then wireless charging functionality can be provided, but system reliability and safety deteriorate due to inability to properly detect and handle rogue objects
Why choose this principle:
The patent applies preliminary action by implementing a rogue object detection procedure that activates before normal power transmission begins. The system performs impedance measurements and checks during initialization to identify rogue objects before they can cause harm, ensuring safety is established in advance rather than reacting to failures after they occur.
Principle concept:
If wireless power transmission is implemented without standardized protocols, then wireless charging functionality can be provided, but system reliability and safety deteriorate due to inability to properly detect and handle rogue objects
Why choose this principle:
The patent implements feedback mechanisms through continuous monitoring of impedance changes during power transmission. The system measures impedance at different power levels and uses this feedback information to detect rogue objects and adjust transmission accordingly, creating a closed-loop control system that enhances reliability.
Application Domain
Data Source
AI summary:
A wireless power transmitter with a controller that determines latch fault mode entry conditions, allowing it to periodically apply specific power values to detect and manage rogue objects, ensuring efficient operation and user notification.
Abstract
A method for controlling a wireless power transmitter that transmits charging power to a wireless power receiver is provided. The method includes driving the wireless power transmitter; determining whether latch fault mode entry conditions are met, in which the wireless power transmitter is allowed to enter a latch fault mode in which the wireless power transmitter periodically applies first power having a first power value in a first cycle; and if the latch fault mode entry conditions are met, periodically applying the first power in the first cycle.