Wireless Power Transmitter Frequency Adjustment for Efficiency
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Solution Overview
Problem
Existing wireless power transfer systems face inefficiencies and stability issues due to variations in distance, apparatus characteristics, and the number of receivers, necessitating a method to adjust transmission frequencies for improved efficiency and stability.
Innovation Solution
A method for setting the frequency of a wireless power signal by acquiring power transmission information from the receiver, which involves transmitting signals with different frequencies sequentially and determining the optimal frequency based on receiving side voltage, current, and reference voltages to ensure efficient and stable power transfer without damaging the receiver.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a fixed transmission frequency is used in wireless power transfer, then the system is simple to operate, but transmission efficiency and stability deteriorate due to variations in distance, apparatus characteristics, and number of receivers
Solution Approach 1:
The patent implements dynamic frequency adjustment by allowing the wireless power transmitter to change transmission frequency based on real-time power transmission information received from the wireless power receiver. The transmitter includes a frequency adjustment unit that modifies the transmission frequency within a predetermined range to optimize power transfer efficiency under varying conditions such as distance, number of receivers, and apparatus characteristics.
Solution Approach 2:
The patent changes the transmission frequency parameter adaptively based on power transmission information. The wireless power transmitter receives information about transmission efficiency, receiving side voltage, and other parameters, then adjusts the transmission frequency accordingly to maintain optimal power transfer conditions while preventing receiver damage.
2Reliability
If transmission frequency is adjusted to improve efficiency, then power transfer performance improves, but system complexity and control difficulty increase
Solution Approach 1:
The patent implements a feedback mechanism where the wireless power receiver measures power transmission information including transmission efficiency and receiving side voltage, then transmits this information back to the wireless power transmitter. The transmitter uses this feedback to automatically adjust transmission frequency, creating a closed-loop control system that maintains stable power transfer without requiring complex manual control.
Solution Approach 2:
The wireless power transmission system performs self-adjustment of transmission frequency based on automatically collected power transmission information. The system monitors its own performance metrics and autonomously optimizes transmission parameters, reducing the need for external control intervention while maintaining high reliability and stability.
3Productivity
If high transmission power is used to improve efficiency, then power transfer rate increases, but risk of damaging the receiver increases
Solution Approach 1:
The patent dynamically adjusts transmission frequency to optimize power transfer while preventing receiver damage. By continuously monitoring receiving side voltage and transmission efficiency, the system adapts transmission parameters in real-time to maintain safe operating levels while maximizing power transfer rate under varying conditions.
Solution Approach 2:
The patent changes transmission frequency as a control parameter to optimize power transfer efficiency while staying within safe operating limits. The system adjusts frequency based on receiver voltage levels and transmission conditions, preventing excessive power delivery that could damage the receiver while maintaining high transfer rates when conditions permit.
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 allows for improved transmission efficiency and stability by selecting a frequency that maximizes receiving side voltage, transmission efficiency, and transmission gain, while avoiding frequencies that could damage the receiver, thus enhancing the overall performance of wireless power transfer.
Implementation Method 1
The Wireless Power Consortium (WPC) which manages technologies for a magnetic inductive wireless power transfer has published a standard document
Data Source
AI summary
The present disclosure relates to a method and apparatus for setting the frequency of wireless power transmission. To this end, the method for setting the frequency of a wireless power transmission apparatus can include the steps of: obtaining power transmission information from the wireless power receiving apparatus receiving a wireless power signal; and setting the transmission frequency of the wireless power signal on the basis of the obtained power transmission information.