Wireless Power Transfer Update Frequency for Coupling Loss
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Solution Overview
Problem
Existing wireless power transfer systems face inefficiencies due to power loss and excess heat generation when coupling between transmitter and receiver antennas degrades, especially in applications with frequent movement of peripheral devices, leading to suboptimal power transmission and potential thermal overwork.
Innovation Solution
A wireless power transfer system that dynamically adjusts its operation by deriving a coupling factor from received data and updating the transmission frequency in real-time to optimize power transmission, thereby maintaining efficient power delivery without wasting energy or overheating components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the wireless transmission system operates at high transmission power to ensure sufficient power transmission during peripheral device movement, then power transmission reliability is improved, but energy waste and heat generation increase
Solution Approach 1:
The system dynamically adjusts the update frequency of coupling data based on the coupling factor. When coupling is strong, updates occur less frequently; when coupling weakens, updates increase in frequency. This dynamic adjustment allows the system to maintain reliable power transmission by detecting coupling degradation early and responding appropriately, while avoiding continuous high-power operation that wastes energy.
Solution Approach 2:
The system implements feedback by monitoring the coupling factor and using it to control the update frequency of coupling data. The transmission controller receives coupling data from the receiver, derives the coupling factor, and adjusts the update frequency accordingly. This closed-loop feedback mechanism ensures power transmission reliability while optimizing energy consumption by updating parameters only when necessary.
2Productivity
If the wireless transmission system increases update frequency of coupling data to track peripheral device movement, then power transmission efficiency is improved, but system complexity and processing overhead increase
Solution Approach 1:
The system changes the parameter of update frequency based on the coupling factor. Instead of using a fixed update frequency, the system adjusts this parameter dynamically: high coupling factor results in lower update frequency, while low coupling factor triggers higher update frequency. This parameter adaptation improves power transmission efficiency by updating coupling data at optimal intervals without requiring complex continuous monitoring.
3Reliability
If the wireless transmission system operates continuously at high power to accommodate extreme movement positions, then power delivery reliability is improved, but thermal wear and component stress increase
Solution Approach 1:
The system takes preliminary action by monitoring the coupling factor and adjusting update frequency before coupling degradation becomes severe. By detecting changes in coupling conditions early and responding with appropriate update frequency adjustments, the system maintains reliable power delivery without needing to operate continuously at maximum power levels, thereby reducing thermal stress and component wear.
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 approach ensures efficient power transfer and extends device longevity by managing power based on coupling changes, reducing waste and thermal issues, even during frequent movement of peripheral devices.
Implementation Method 1
Such systems often use inductive and/or resonant inductive wireless power transfer, which occurs when magnetic fields created by a transmitting element induce an electric field and, hence, an electric current, in a receiving element.
Data Source
AI summary
A wireless power transfer system is provided having a wireless transmission system with an input to receive input power from an input power source, a transmission antenna configured to couple with a receiver antenna associated with a wireless receiver system in a peripheral device, and a transmission controller configured to generate AC wireless signals including wireless power signals and wireless data signals. The transmission controller is further configured to derive a coupling factor based on coupling data sent from the wireless receiver system to the wireless transmission system, generate an update frequency based on the derived coupling factor, and transmit the update frequency to the wireless receiver system in the peripheral device, whereby the peripheral device provides coupling data to the wireless transmission system based on the update frequency.