Slotted Wireless Power Transfer for High-Power AC and Data Fidelity
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Solution Overview
Problem
Existing wireless power transfer systems struggle to efficiently transfer high-power AC signals to devices while also enabling data communication, as traditional methods are either inefficient or require additional costly circuitry, and legacy systems are limited in power handling and data fidelity.
Innovation Solution
The implementation of a wireless power transfer system that generates both virtual AC and DC power signals, using a damping circuit to enhance signal quality and a voltage isolation circuit to achieve higher power transfer and data fidelity, allowing for slotted communications to avoid interference and optimize power delivery.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If wireless power transfer systems use traditional methods to transfer high-power AC signals, then power transfer capability is improved, but data communication fidelity deteriorates due to interference and additional costly circuitry requirements
Solution Approach 1:
The system segments the power transfer signal into time slots, with dedicated communication slots and power transfer slots. This segmentation allows data communication to occur during intervals when high-power AC signal transfer is suspended, eliminating interference between data and power signals while maintaining both functions without requiring additional costly circuitry
Solution Approach 2:
The system employs periodic action by alternating between communication phases and power transfer phases in a regular time-slot pattern. During communication slots, the transmitter sends data signals; during power transfer slots, high-power AC signals are transmitted. This periodic alternation ensures that data communication fidelity is maintained while achieving high power transfer capability
2Adaptability or versatility
If legacy wireless power transfer systems are used, then device compatibility is improved, but power handling capability deteriorates due to limitations in power levels and efficiency
Solution Approach 1:
The system implements dynamic slot width adjustment where the duration of communication slots and power transfer slots can be varied based on the specific requirements of the connected device. This dynamic adaptation allows the system to maintain compatibility with various devices while optimizing power handling capability and transfer efficiency for each device type
Solution Approach 2:
The system changes operational parameters including slot durations, power levels, and signal characteristics to accommodate different device requirements. By dynamically adjusting these parameters, the system achieves broad device compatibility while simultaneously enabling high power handling capability that exceeds legacy system limitations
3Loss of information
If additional circuitry is added to enable data communication during high-power transfer, then data communication capability is improved, but device complexity and cost deteriorate
Solution Approach 1:
The system achieves multi-functionality by using the same wireless transmission channel for both data communication and power transfer, rather than requiring separate dedicated circuits for each function. The single wireless interface handles both functions by alternating between communication modes and power transfer modes, eliminating the need for additional costly circuitry while maintaining full data communication capability
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
Enables efficient high-power AC signal transfer with improved data communication fidelity, supporting power levels over 1 W and enabling cost-effective high-frequency wireless power transfer without degrading data protocols, thus addressing the limitations of legacy systems.
Implementation Method 1
The transmission antenna is configured to couple with the receiver antenna and transmit virtual AC power signals to the receiver antenna
Data Source
AI summary
A wireless power transmission system includes a first antenna, a second antenna, a controller, a first power conditioning system, and a second power conditioning system. The controller is configured to determine a first driving signal for driving the first antenna based on a first operating frequency, a virtual AC power frequency, a variable slot length, and slot timing, and determine a second driving signal for driving the second antenna based on a second operating frequency, the slot length, and the slot timing. The first power conditioning system is configured to receive the first driving signal to generate the virtual AC power signals at the first operating frequency, the virtual AC power signals having peak voltages rising and falling based on the virtual AC power frequency. The second power conditioning system is configured to receive the second driving signal to generate the virtual DC power signals at the second operating frequency.