Wireless Power Receiver Regulation for Stable Link Feedback
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Solution Overview
Problem
Existing wireless power transfer systems face instability and communication challenges, particularly when using constant power converters like three-level buck converters, which can lead to instability if the power exceeds a certain threshold, and inefficient communication protocols that may compromise system stability.
Innovation Solution
Implementing a wireless power receiver with a regulator control circuitry that monitors rectifier output voltage or current, adjusts power levels based on thresholds, and communicates power feedback parameters using different communication policies to maintain stability and improve communication reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If constant power converters are used to maintain stable output power, then power regulation is improved, but system stability deteriorates when power exceeds certain thresholds
Solution Approach 1:
The patent implements dynamic power adjustment by transitioning from constant power mode to variable power mode. The regulator control circuitry continuously monitors rectifier output voltage and current, and dynamically adjusts the regulator's power level based on real-time conditions to prevent instability while maintaining power regulation.
Solution Approach 2:
The patent employs feedback control mechanisms where the regulator control circuitry monitors rectifier output voltage and current, compares them against threshold values, and adjusts the regulator's power level accordingly. This closed-loop feedback system prevents the system from entering unstable states while maintaining effective power regulation.
2Loss of information
If communication packets are transmitted frequently to improve control accuracy, then communication reliability is improved, but system stability deteriorates due to increased communication overhead
Solution Approach 1:
The patent implements selective communication strategies where control error packets are transmitted only when necessary based on system conditions. The regulator control circuitry evaluates whether communication is needed by monitoring power levels and stability conditions, transmitting packets partially rather than continuously, thus maintaining communication reliability without excessive overhead.
Solution Approach 2:
The patent dynamically adjusts communication parameters such as packet transmission frequency and power feedback parameter values based on system operating conditions. By changing communication parameters adaptively rather than using fixed settings, the system maintains reliable control information exchange while minimizing communication overhead that could destabilize the system.
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 solution ensures stable wireless power transfer by dynamically adjusting power levels and communication strategies, preventing system instability and enhancing communication robustness.
Implementation Method 1
a wireless power receiving coil having an AC voltage induced thereacross by a wireless power transmitting coil of a wireless power transmitter when the wireless power transmitting coil is magnetically coupled to the wireless power receiving coil
Data Source
AI summary
A wireless power receiver (PRx) can include regulator control circuitry that monitors a rectifier output voltage and/or current and reduces a power level of the regulator if the monitored voltage or current is above a threshold to maintain stability of a wireless power transfer link. A PRx can include control circuitry that can, responsive to a need for an increased wireless power transfer, compute a power feedback parameter in accordance with a first equation or, responsive to a need for a decreased wireless power transfer, compute the power feedback parameter in accordance with a second equation, and send a communication packet including the power feedback parameter to a wireless power transmitter. The wireless power receiver control circuitry can further send the communication packet according to a first or second communications loading control policy that can temporarily reduce output power during transmission.