Wireless Power Transfer Module with Feedback Control via Resonance
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Solution Overview
Problem
Existing wireless power transfer systems for household electronic devices face challenges such as communication delays, increased costs due to separate wireless communication modules, and potential power failures from misalignment or communication failures, which can lead to unstable power supply and increased current stress.
Innovation Solution
An electronic apparatus with a power transfer module that includes a primary resonator and a secondary resonator for wireless power transfer, utilizing an LLC resonant converter and a controller to stabilize power supply without separate feedback means, and automatic alignment features to ensure efficient power transfer even with misalignment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If separate wireless communication modules are added for feedback control, then feedback capability is improved, but device complexity and manufacturing cost increase
Solution Approach 1:
The patent combines the feedback control function with the existing wireless power transfer communication channel. The receiver extracts feedback information (voltage level, power reception status) from the power transfer signal itself, eliminating the need for separate feedback communication modules at both transmitter and receiver. This merging approach maintains reliable feedback control while reducing device complexity and manufacturing costs.
Solution Approach 2:
The wireless communication module is designed to perform multiple functions: both power transfer and feedback control through the same channel. The module serves dual purposes by encoding feedback information within the power transfer signal, allowing a single module to handle both power delivery and control feedback, thereby reducing the need for additional dedicated feedback modules.
2Reliability
If separate wireless communication modules are added for feedback control, then feedback capability is improved, but manufacturing cost increases
Solution Approach 1:
The patent combines the feedback control function with the existing wireless power transfer communication channel. The receiver extracts feedback information (voltage level, power reception status) from the power transfer signal itself, eliminating the need for separate feedback communication modules at both transmitter and receiver. This merging approach maintains reliable feedback control while reducing device complexity and manufacturing costs.
Solution Approach 2:
The system uses its own power transfer communication channel to provide feedback control, rather than relying on external or separate communication infrastructure. The receiver self-services by extracting feedback information from the incoming power signal, and the transmitter self-regulates based on this feedback, eliminating the need for additional paid communication components.
3Device complexity
If wireless power transfer is implemented without feedback control, then device complexity is reduced, but power supply reliability deteriorates
Solution Approach 1:
The patent implements a feedback mechanism where the receiver detects voltage levels from the received power signal and transmits this information back to the transmitter through the same wireless channel. The transmitter uses this feedback to adjust its output, ensuring stable power delivery. This feedback loop maintains power supply reliability while avoiding the need for separate dedicated feedback communication modules.
Solution Approach 2:
The patent replaces traditional wired feedback control (mechanical/physical connection) with wireless feedback through the power transfer channel itself. Instead of using separate physical communication cables or dedicated feedback wires, the system encodes and transmits feedback information wirelessly through the electromagnetic power transfer field, maintaining reliability while reducing physical complexity.
4Productivity
If resonance frequency is precisely controlled, then power transfer efficiency is improved, but sensitivity to misalignment increases
Solution Approach 1:
The patent implements dynamic frequency adjustment based on real-time feedback about receiver position and coupling conditions. The transmitter continuously monitors power transfer efficiency and adjusts the resonance frequency dynamically to maintain optimal coupling even when misalignment occurs. This dynamic adaptation allows the system to maintain both high efficiency and tolerance to positioning variations.
Solution Approach 2:
The system changes the operating resonance frequency parameter in response to detected misalignment or coupling changes. By adjusting the frequency parameter dynamically rather than fixing it, the system maintains resonant coupling efficiency across a range of positions, effectively broadening the acceptable alignment tolerance while preserving transfer efficiency.
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 enables stable and efficient wireless power transfer without separate feedback modules, reduces manufacturing costs, and prevents current stress by maintaining power supply consistency even with varying voltage levels, ensuring reliable operation and user convenience.
Implementation Method 1
a primary resonator configured to operate at an operation frequency of a preset range corresponding to a resonant frequency, a power receiver comprising a secondary resonator configured to resonate with the primary resonator and wirelessly receive power from the power transfer module
Implementation Method 2
an inverter configured to operate at the frequency of the preset range and transfer power to the primary resonator
Implementation Method 3
a rectifying unit configured to convert the AC power received from the primary resonator of the power transfer module into direct current (DC) power to be supplied to the electronic apparatus
Data Source
AI summary
An electronic apparatus including a power transfer module configured to wirelessly transfer power to a power receiver and a controller configured to control the power receiver to transfer power based on voltage applied from the power transfer module to the power receiver.