Wireless Power Transmitter Dynamic Voltage Control
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Solution Overview
Problem
Conventional wireless power transmission systems face inefficiencies in charging multiple devices simultaneously, as they rely on fixed minimum and maximum voltage ranges, which can lead to varying charging efficiency due to differences in device characteristics and charging conditions.
Innovation Solution
A method and apparatus that adjust power transmission by receiving voltage information and power reception reports from multiple power receivers, selecting a reference voltage for optimal efficiency, and dynamically adjusting the power to match the demanded voltage of each receiver, using a power transmitter with a resonator, power supply, and wireless communication unit.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a single power transmitter uses fixed voltage reference for power control, then the system structure is simple, but charging efficiency varies depending on device characteristics and charging conditions
Solution Approach 1:
The patent implements dynamic power control by continuously monitoring the actual voltage at each power receiver and adjusting the transmitted power in real-time. The controller modifies the power transmission level based on feedback from voltage measurements, transitioning from a static fixed-voltage approach to a dynamic adaptive system that optimizes charging efficiency for each device's specific conditions
Solution Approach 2:
The system incorporates a feedback mechanism where the actual voltage at each power receiver is measured and reported back to the controller. The controller uses this feedback information to adjust the power transmission level, creating a closed-loop control system that continuously optimizes power delivery based on actual receiving conditions
2Productivity
If multiple power receivers are charged simultaneously with fixed power transmission, then the system operation is simple, but the power demanded from each receiver may differ from transmission power
Solution Approach 1:
The patent segments the power control process into individual receiver-specific control loops. Each power receiver is monitored independently with separate voltage measurements and power adjustments, allowing the system to handle multiple devices with different power demands simultaneously while maintaining optimal efficiency for each segment
Solution Approach 2:
The system dynamically changes power transmission parameters based on the specific conditions of each power receiver. By adjusting voltage and power levels individually for each receiver based on their demanded power and actual receiving conditions, the system optimizes overall power transmission efficiency while managing multiple devices
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 transmission by adapting to individual device conditions, optimizing charging efficiency and preventing overheating or undercharging, thereby enhancing the reliability and efficiency of wireless charging systems.
Implementation Method 1
In resonance method based charging, when a power receiver in need of charging is located in a power transmitter for transmitting wireless power
Data Source
AI summary
Methods and apparatuses are provided for controlling power transmission in a power transmitter. Voltage information including a minimum voltage, a maximum voltage, and a first voltage, is received from each of a plurality of power receivers. Power is transmitted to the plurality of power receivers based on the voltage information. A respective report about a power reception condition is received from each of the plurality of power receivers while transmitting the power. Each respective report includes a measured voltage at a corresponding power receiver of the plurality of power receivers. A power receiver is selected from among the plurality of power receivers based on the received reports. An amount of the power is adjusted by reducing a difference between a first voltage of the selected power receiver and a measured voltage of the selected power receiver.