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 the lack of a standard for selecting the correct wireless power transmitter and communication protocols.
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-connection by adjusting transmission power levels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If wireless power transmission is implemented without standardized selection protocols, then wireless charging convenience is improved, but cross-connection problems occur where receivers join wrong power networks
Solution Approach 1:
The patent implements a feedback mechanism where the wireless power transmitter detects load changes caused by receiver placement, communicates with the receiver through standardized protocols, and verifies proper connection before power transfer. This feedback loop ensures receivers join the correct power network while maintaining wireless charging convenience.
Solution Approach 2:
The patent establishes preliminary communication and verification procedures before actual power transmission begins. The transmitter and receiver exchange identification information and confirm compatibility through standardized protocols, ensuring correct network connection is established before energy transfer starts.
2Reliability
If load detection is performed continuously to prevent cross-connection, then connection accuracy is improved, but system complexity increases
Solution Approach 1:
The patent performs load detection at specific periodic intervals - initially when a receiver is placed on the charging surface, and subsequently at defined stages of the charging process. This periodic approach maintains connection accuracy while avoiding the excessive complexity of continuous monitoring systems.
3Reliability
If communication protocols are standardized to prevent cross-connection, then power transmission reliability is improved, but device complexity increases
Solution Approach 1:
The patent implements universal communication protocols that enable different wireless power transmitters and receivers to interact through standardized identification and verification procedures. This multi-functional protocol system ensures reliable power transmission while avoiding excessive complexity by using widely compatible communication standards.
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 solution effectively prevents cross-connection by ensuring that only valid wireless power receivers are connected and charged, maintaining the stability of the power transmission system and preventing damage from foreign objects, while allowing multiple receivers to be charged efficiently.
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.