Wireless Power Transmitter Load Change Authorization
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Wireless power transmission systems face issues with cross-connection, where a wireless power receiver is inadvertently connected to a different transmitter, leading to improper power delivery due to mismatched capacities, resulting in over or under-powering.
Innovation Solution
A method and system for controlling wireless power transmitters to transmit charging power to authorized receivers by using control signals with time and load change information, detecting load changes, and determining authorization based on corresponding information, ensuring accurate power delivery.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If wireless power transmission is performed over extended communication distances using out-band schemes, then communication availability is improved, but the risk of cross-connection between transmitters and receivers increases
Solution Approach 1:
The patent applies preliminary action by performing load change detection and authorization verification before initiating power transmission. The transmitter sends a control signal with time information and load change information, then detects whether the receiver's load changes as expected during a predetermined period. This preliminary verification ensures that only authorized receivers receiving power from the correct transmitter can proceed with charging, thereby preventing cross-connection issues that could arise from extended communication distances.
2Productivity
If power transmission is performed without authorization verification, then charging speed is improved, but power delivery accuracy deteriorates due to mismatched capacities
Solution Approach 1:
The patent implements feedback by having the transmitter send control signals with time information and load change information to the receiver, then detecting whether the receiver's load changes as expected during a predetermined period. The transmitter determines authorization based on whether the detected load change corresponds to the transmitted load change information. This feedback mechanism ensures accurate power delivery matching transmitter capacity with receiver requirements while maintaining efficient charging speeds.
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
Prevents cross-connection by ensuring that charging power is transmitted only to receivers with matching load requirements, maintaining efficient and safe charging processes.
Implementation Method 1
The wireless charging typically utilizes an electromagnetic induction scheme using coils
Implementation Method 2
a resonance scheme using a resonance
Data Source
AI summary
A wireless power transmitter and method are provided for transmitting charging power to a wireless power receiver. The method includes transmitting, to the wireless power receiver, a control signal including first time information and load change information; detecting a load change of the wireless power receiver during a period of time corresponding to the first time information; and determining that the wireless power receiver is authorized for charging, if the detected load change of the wireless power receiver corresponds to the load change information included in the control signal.