Wireless Power Feeding System Dynamic Transmission Power Control
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing wireless power feeding systems using microwave power transmission face challenges in efficiently controlling transmission power and maintaining optimal communication via load modulation, especially when the number of power reception apparatuses or their positional relationships are unknown, leading to inefficiencies and potential communication disruptions due to excessive or insufficient power transmission.
Innovation Solution
The system employs a power feeding system with a power transmission apparatus and a power reception apparatus that utilize load modulation communication to control the charging current and input voltage within specific thresholds, adjusting transmission power to maintain optimal communication by dynamically adjusting the charging current and input voltage based on feedback, ensuring efficient power transfer and preventing communication disruptions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If transmission power is increased to ensure power delivery to multiple reception apparatuses, then power delivery capability is improved, but communication reliability deteriorates due to excessive power causing load modulation disruptions
Solution Approach 1:
The system employs feedback mechanisms where the power transmission apparatus monitors communication quality and power delivery status from multiple reception apparatuses. Based on this feedback, the transmission power is dynamically adjusted to maintain optimal levels - sufficient for power delivery but not excessive to cause load modulation disruptions. This closed-loop control resolves the contradiction by continuously adapting transmission power to actual system conditions.
Solution Approach 2:
The system transitions from static transmission power settings to dynamic power adjustment. The power transmission apparatus continuously adapts transmission power levels based on real-time conditions including the number of active reception apparatuses, their positional relationships, and communication quality. This dynamic approach allows the system to optimize power delivery while preventing communication disruptions caused by excessive power.
2Reliability
If transmission power is decreased to maintain communication quality, then communication reliability is improved, but power delivery capability deteriorates due to insufficient power transmission
Solution Approach 1:
The system applies different power levels to different spatial locations and reception apparatuses based on their specific needs. Rather than using a uniform power level, the power transmission apparatus adjusts transmission power locally for each reception apparatus according to factors such as distance, orientation, and power requirements. This allows sufficient power delivery to each device while maintaining overall communication reliability.
Solution Approach 2:
The system uses dynamic power adjustment to optimize the balance between power delivery and communication quality. Transmission power is continuously adapted based on real-time monitoring of both power delivery effectiveness and communication status. This dynamic control enables the system to provide sufficient power when needed while maintaining communication reliability, resolving the contradiction between these two requirements.
3Adaptability or versatility
If the system adapts to unknown number of reception apparatuses and positional relationships, then system versatility is improved, but control complexity increases due to need to manage multiple variable conditions
Solution Approach 1:
The power transmission apparatus employs self-service mechanisms where reception apparatuses automatically perform measurements and reports of their own status, power reception quality, and positional information. The transmission apparatus uses this self-reported data to automatically adjust transmission power without requiring complex external control systems. This reduces control complexity while maintaining high adaptability to unknown numbers and positions of reception apparatuses.
Solution Approach 2:
The system performs preliminary measurements and characterizations during initialization phases. Reception apparatuses pre-measure and report their optimal power levels, positional relationships, and communication parameters before actual power transmission begins. This preliminary action allows the system to adapt to multiple reception apparatuses with varying positions and requirements while simplifying subsequent control operations by having reference data already established.
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 stable load modulation communication even in uncertain conditions, optimizing transmission power to maintain efficient power transfer and prevent communication failures, ensuring reliable wireless power feeding across multiple power reception apparatuses.
Implementation Method 1
a wireless power feeding system for transmitting power from a power transmission apparatus to a power reception apparatus using microwave power transmission technology
Implementation Method 2
The power reception apparatus 220 receives the electromagnetic wave and performs charging with an input voltage Vmod according to the transmission power
Data Source
AI summary
A wireless power feeding system is provided, comprising a power transmission apparatus configured to transmit predetermined transmission power and a power reception apparatus configured to receive the transmission power and generate input voltage according to the transmission power, wherein the power transmission apparatus includes a power transmission control unit configured to control an amount of the transmission power, the power transmission control unit is configured to receive a modulation signal from the power reception apparatus, and to reduce the transmission power in a case where the modulation signal is not received for a predetermined period after receiving the previous modulation signal, and the power transmission apparatus and the power reception apparatus are configured to control the input voltage to be larger than a predetermined first threshold and below a second threshold which is larger than the first threshold.