Wireless Power Transmitter Controller for Data Collision Prevention
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Solution Overview
Problem
Wireless power transmission systems face challenges in managing data collisions and normal charging operations when multiple target devices approach or are near the source device, leading to inefficiencies and interrupted charging processes.
Innovation Solution
A wireless power transmitter with a controller that detects changes in current and adjusts output power based on the state of target devices, including determining if devices have changed charging modes or been completely charged, to optimize power transmission and prevent data collisions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a single source device transmits power to multiple target devices simultaneously, then power transmission capability is improved, but data collision occurs during initial connection operations
Solution Approach 1:
The source device performs preliminary detection of current changes before initiating full power transmission to multiple target devices. This preliminary action allows the system to identify target devices and establish connections in a controlled manner, preventing data collisions during the initial connection phase while maintaining the capability to serve multiple devices simultaneously.
Solution Approach 2:
The system continuously monitors current changes as feedback from target devices and uses this information to adjust power transmission levels. This feedback mechanism enables the source device to manage multiple target devices effectively by detecting when devices are properly connected and when to adjust or interrupt power transmission, thereby preventing data collisions while maintaining high productivity.
2Speed
If the source device increases output power to charge multiple target devices, then charging speed is improved, but current detection accuracy deteriorates due to load variations
Solution Approach 1:
The source device dynamically adjusts its output power level based on detected current changes and target device states. Rather than maintaining a fixed high power level, the system adapts power transmission in real-time, which maintains high charging speed when appropriate while improving current detection accuracy by operating at optimized power levels that reduce noise and interference from excessive load variations.
3Manufacturing precision
If the source device continuously monitors current changes to detect target device states, then charging control precision is improved, but energy consumption increases
Solution Approach 1:
The source device performs current change detection at periodic intervals rather than continuously, and triggers detailed monitoring only when specific current change patterns are detected. This periodic action maintains high charging control precision by detecting important state changes (such as target device connection, disconnection, or charging completion) while significantly reducing energy consumption compared to continuous monitoring.
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 manages multiple target devices by adjusting output power in response to changes in current and device states, ensuring efficient and uninterrupted charging operations.
Implementation Method 1
Magnetic coupling or resonance coupling may occur between the source resonator and the target resonator
Implementation Method 2
Magnetic coupling or resonance coupling may occur between the source resonator and the target resonator
Data Source
AI summary
A method and apparatus for controlling wireless power transmission are provided. An output power of a source device may be wirelessly transmitted to a target device via a resonator. The source device may detect a change in a current of the output power, and may request the target device to verify a state of the target device. The source device may determine a state of a wireless power transmission based on the change in the current and the state of the target device. The source device may control wireless power transmission based on the determined state of the wireless power transmission.