Wireless Power Transmitter Cross-Connection Prevention
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Solution Overview
Problem
Current wireless charging technologies face issues with cross-connection problems, where a wireless power receiver may join the wrong power network, leading to overcharging or undercharging due to varying capacities and distances between transmitters and receivers, without a standard for communication and power allocation.
Innovation Solution
A wireless power transmitter system that includes a resonant signal generator, a wireless communication unit, and a controller to detect changes in load and determine whether to transmit power based on load detection indication bits, ensuring that only valid receivers are charged and preventing cross-connections by adjusting transmission power and communication connections.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If wireless power transmission is performed without load detection and cross-connection prevention, then power transmission simplicity is maintained, but cross-connection problems occur causing overcharging or undercharging
Solution Approach 1:
The system performs load detection and cross-connection prevention checks before initiating power transmission. The controller detects load changes and validates receiver identity in advance, ensuring accurate charging while preventing cross-connection issues before they occur.
Solution Approach 2:
The system continuously monitors load changes during power transmission and uses this feedback to detect cross-connections. When load changes indicate a potential cross-connection, the system adjusts power transmission accordingly, maintaining charging accuracy through real-time feedback control.
2Reliability
If load detection is performed continuously to prevent cross-connections, then charging reliability is improved, but energy consumption increases
Solution Approach 1:
The controller performs load detection at specific intervals and at key stages such as before power transmission begins and when changes in power reception are detected. This periodic detection approach maintains cross-connection prevention reliability while minimizing unnecessary energy consumption from continuous monitoring.
3Adaptability or versatility
If multiple wireless power receivers are served simultaneously, then system versatility is improved, but power allocation accuracy deteriorates due to cross-connections
Solution Approach 1:
The system segments power transmission by establishing separate communication channels and power transmission paths for different receivers. The controller identifies each receiver individually and allocates power independently to each valid receiver, preventing cross-connections even when serving multiple devices simultaneously.
Solution Approach 2:
The wireless communication unit acts as an intermediary between the controller and multiple receivers, enabling the controller to identify and manage each receiver separately. This intermediary communication layer allows accurate power allocation to multiple receivers while preventing cross-connections through individual receiver validation.
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
The system effectively prevents cross-connections by ensuring that only valid receivers are charged, maintaining stable power transmission and preventing damage from foreign objects, while allowing multiple receivers to be charged efficiently within a valid distance.
Implementation Method 1
a system in which a battery of a cellular phone may be automatically or wirelessly charged when a user merely puts the cellular phone on a charging pad
Implementation Method 2
The electromagnetic induction-based power transmission method includes transferring power between a primary coil and a secondary coil
Data Source
AI summary
A method and apparatus for controlling a wireless power transmitter configured to transmit power to a wireless power receiver is provided. The method includes receiving a first signal from the wireless power receiver, wherein the first signal comprises load detection indication bits, detecting a change in load of the wireless power transmitter caused by placement of the wireless power receiver in a charging area of the wireless power transmitter, based on the load detection indication bits, and determining whether to transmit a second signal to the wireless power receiver based on detecting the change in load of the wireless power transmitter.