Wireless Power Transmitter Voltage Frequency Tuning
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Solution Overview
Problem
Wireless power transfer systems face inefficiencies in power delivery, leading to energy loss and thermal issues, which threaten electronic components.
Innovation Solution
A method and system that wirelessly couples a transmitter-side coil to a receiver-side coil, using a controller to set voltage and frequency based on output power information from the receiver system, incorporating a sensing circuit and DC/DC converter to optimize power delivery efficiency through a voltage-frequency tuning process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If wireless power transfer is implemented, then power delivery convenience is improved, but power delivery efficiency deteriorates
Solution Approach 1:
The patent implements dynamic voltage and frequency tuning where the power transmitter continuously adjusts operating parameters based on real-time coupling conditions. The controller modifies voltage amplitude and frequency dynamically to maintain optimal power transfer efficiency across varying load conditions and distances, transforming a static system into an adaptive one that responds to changing environmental factors.
Solution Approach 2:
The system changes key operating parameters (voltage and frequency) to optimize power transfer. By sweeping through different voltage and frequency combinations and selecting the pair that maximizes power delivery efficiency, the system adapts to different coupling conditions without requiring physical reconfiguration, thereby maintaining high efficiency while providing wireless convenience.
2Loss of energy
If power delivery efficiency is increased through tuning, then energy loss is reduced, but system complexity increases
Solution Approach 1:
The patent employs feedback mechanisms where the power transmitter receives output power information from the power receiver and uses this information to adjust its voltage and frequency settings. This closed-loop control enables the system to automatically optimize efficiency without manual intervention, reducing energy loss while managing complexity through intelligent control algorithms.
Solution Approach 2:
The system performs self-optimization by automatically tuning its own operating parameters. The controller autonomously sweeps through voltage and frequency combinations, evaluates power transfer efficiency, and selects optimal settings without external assistance, enabling the system to maintain high efficiency while minimizing the need for complex external control infrastructure.
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
Enhances wireless power delivery efficiency by maximizing the ratio of received power to input power, reducing energy loss and thermal issues, and ensuring stable and smooth operation.
Implementation Method 1
power/energy may be transferred from one or more power transmitter coils to one or more power receiver coils through magnetic coupling
Data Source
AI summary
Methods and devices for increasing power delivery efficiency of wireless power transfer systems are disclosed. A wireless power transfer system may include a power transmitter system and a power receiver system. The power transmitter system may comprise a power amplifier, a power transmitter, a controller, and a sensing circuit. The power amplifier may be configured to receive an input power. The power transmitter system may include a transmitter-side coil configured to wirelessly couple to a receiver-side coil of the power receiver system. The controller may be configured to set a voltage and a frequency of the power transmitter system based on output power information of the power receiver system to increase wireless power delivery efficiency of the wireless power transfer system. The sensing circuit may be configured to determine the output power information of the power receiver system.