Wireless Power Transfer Input Stabilization for Large-Area Coupling
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Solution Overview
Problem
Existing wireless power transfer systems face challenges in maintaining stable and accurate communication and power transfer over large areas, especially when the receiver is in motion, due to dynamic changes in coupling and signal strength, leading to inefficiencies and potential operational instability.
Innovation Solution
The implementation of a wireless power transmission system with an input stabilization system, a proportional integral (PI) controller, and a demodulation circuit that uses a period-based timing scheme to enhance stability and accuracy of communications, along with internal repeaters and optimized antenna designs to maintain uniformity and resilience against metal interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If wireless power transfer is performed over large areas with moving receivers, then coverage area and mobility are improved, but coupling stability and signal strength consistency deteriorate
Solution Approach 1:
The patent implements dynamic adjustment of transmission parameters including frequency, power level, and phase based on real-time coupling conditions detected by the receiver. The system continuously adapts to changing receiver positions and orientations, transforming a static system into a dynamic one that maintains optimal performance across large areas and moving receivers.
Solution Approach 2:
The receiver sends feedback signals to the transmitter containing information about coupling quality, position, and required power adjustments. This feedback loop enables the transmitter to compensate for changing conditions and maintain stable power transfer despite receiver motion and varying coupling conditions.
2Power
If transmission power is increased to maintain signal strength over large areas, then power transfer capability is improved, but energy loss and system complexity increase
Solution Approach 1:
The system employs periodic modulation of the transmission signal at specific frequencies that resonate with the receiver circuitry. This periodic action enables efficient energy transfer at lower power levels by exploiting resonant coupling, reducing overall energy loss while maintaining adequate power transfer capability across large areas.
Solution Approach 2:
The transmitter dynamically changes operating parameters including frequency, power level, and modulation depth based on detected coupling conditions and receiver feedback. This allows the system to maintain effective power transfer with minimal energy loss by optimizing parameters for each specific transmission condition rather than using constant high power.
3Measurement precision
If complex control algorithms are used to maintain stability over large areas, then communication accuracy is improved, but computational resource requirements increase
Solution Approach 1:
The patent replaces complex computational control algorithms with analog circuit-based demodulation and detection mechanisms. The receiver uses hardware-based phase-locked loops and frequency discrimination circuits to accurately track and decode transmission signals, substituting mechanical/electrical systems for computational ones and reducing processor requirements while maintaining high communication accuracy.
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 system achieves stable and efficient power transfer and communication over large areas by minimizing computational resources, reducing costs, and maintaining consistent performance despite dynamic changes in coupling and orientation, thereby enhancing user experience and system reliability.
Implementation Method 1
The input power stabilization system includes a proportional integral (PI) controller and is configured to receive an input power from an external power source and generate a stabilized direct current (DC) power based on a desired input power
Implementation Method 2
Wireless connection systems often use 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
Implementation Method 3
The antenna is configured to transmit the AC wireless signals when driven by the amplifier
Data Source
AI summary
A wireless power transmission system includes an input stabilization system, a controller, an amplifier, and an antenna. The input power stabilization system includes a proportional integral (PI) controller and is configured to receive an input power from an external power source and generate a stabilized direct current (DC) power based on a desired input power. The controller is configured to generate a driving signal for alternating current (AC) wireless signals, the AC wireless signals including wireless power signals. The amplifier is configured to (i) receive the stabilized DC power and antenna driving signals, (ii) invert the stabilized DC power based on the driving signals to generate alternating current (AC) wireless signals. The antenna is configured to transmit the AC wireless signals when driven by the amplifier.