Wireless Power Resonator Control for Multi-PRU Selection
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Solution Overview
Problem
Wireless power transfer systems face challenges in optimizing power transfer efficiency when dealing with multiple power receiving units (PRUs) of different categories, as existing dominant PRU selection methods struggle to account for varying requirements and capabilities.
Innovation Solution
Defining novel parameters such as temperature ratio, current ratio, voltage ratio, PRU power ratio, and PRU-PTU power ratio for PRUs to report to the power transmitting unit (PTU), allowing the PTU to identify a dominant PRU based on these criteria for optimized power transfer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If existing dominant PRU selection methods are used, then the system can identify a single dominant PRU, but it fails to account for varying requirements and capabilities of different PRU categories, resulting in suboptimal power transfer efficiency
Solution Approach 1:
The patent introduces multiple new parameters (temperature ratio, current ratio, voltage ratio, PRU power ratio, and PRU-PTU power ratio) to characterize PRUs. By changing from a single dominant PRU selection criterion to multiple parameters that capture different aspects of PRU characteristics, the system can adapt to varying requirements and capabilities of different PRU categories while maintaining efficient power transfer.
2Measurement precision
If multiple parameters are introduced for PRU characterization, then the selection accuracy of dominant PRU improves, but the system complexity increases due to additional measurement and processing requirements
Solution Approach 1:
The patent segments the PRU characterization into distinct parameters (temperature ratio, current ratio, voltage ratio, PRU power ratio, PRU-PTU power ratio), each capturing a specific aspect of PRU behavior. This segmentation allows for precise characterization while enabling modular measurement and processing, where each parameter can be independently measured and evaluated.
Solution Approach 2:
The multiple parameters serve multiple functions: they characterize PRU capabilities, guide dominant PRU selection, and enable adaptation to different PRU categories. This multi-functionality justifies the additional complexity by providing comprehensive PRU characterization that improves power transfer efficiency across diverse scenarios.
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
Improves the selection of the dominant PRU, enhancing the overall efficiency and adaptability of wireless power transfer systems by considering the specific characteristics of each PRU, thereby optimizing power transfer across diverse PRU categories.
Implementation Method 1
the PTU may apply current to a resonator coil, which may transfer power to one or more power receiving units (PRUs) via resonant inductive coupling with resonator coils of those PRUs
Data Source
AI summary
Resonator control techniques for wireless power transmitting units are described. One or more novel parameters may be defined for use in conjunction with dominant PRU selection on the part of a PTU. In various embodiments, each of a plurality of PRUs may determine values for one or more such parameters, and may report those values to the PTU. In some embodiments, the PTU may identify a parameter to be used as a selection criterion, and may identify the dominant PRU based on the respective values reported for that parameter by the plurality of PRUs. Other embodiments are described and claimed.