Wireless Power Receiver Modulation for Uniformity
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Solution Overview
Problem
Existing wireless power transmission systems face challenges in achieving uniform power transmission over large areas, particularly when the receiver is in motion, and they often require more conductive materials which increase costs and environmental concerns.
Innovation Solution
The system employs internal repeater coils with alternating current directions and polygonal receiver coils to enhance uniformity and metal resilience, while minimizing the use of conductive materials, and incorporates a demodulation circuit for efficient data communication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If more turns, coils, and resonant bodies are used within an antenna to enhance uniformity ratio, then uniformity ratio is improved, but cost, bill of materials, and environmental concerns increase due to more conductive materials
Solution Approach 1:
The transmitter antenna is divided into multiple segments (first transmitter antenna segment and second transmitter antenna segment) with different current directions. This segmentation allows each segment to contribute differently to the magnetic field, achieving uniformity without requiring excessive conductive materials throughout the entire antenna structure.
Solution Approach 2:
Different segments of the transmitter antenna are assigned different current directions (first current direction and second current direction) to create localized variations in magnetic field contribution. This local quality differentiation optimizes the overall uniformity ratio while minimizing total material usage by placing conductive materials only where needed for specific field contributions.
2Area of stationary object
If wireless power transmission is performed over a large charge area, then charging area is improved, but variations in field strength limit operations and reduce coupling consistency
Solution Approach 1:
The transmitter antenna is segmented into multiple sections that can be independently controlled with different current directions. This segmentation enables the system to maintain consistent coupling across a larger charge area by adjusting the contribution of each segment, thereby expanding the effective charging area while maintaining reliability.
Solution Approach 2:
The patent introduces the dimension of current direction control in addition to magnitude control. By varying both the direction and magnitude of currents in different antenna segments, the system creates a more uniform magnetic field distribution across the charge area, effectively expanding the usable charging area while maintaining coupling consistency.
3Adaptability or versatility
If receiver is in motion during charging, then adaptability is improved, but uniform power transmission over large area becomes more difficult to achieve
Solution Approach 1:
The system dynamically adjusts the current directions and magnitudes in different transmitter antenna segments based on receiver position. This dynamic control allows the system to adapt to moving receivers while maintaining uniform power transmission, as the antenna configuration can change in real-time to compensate for receiver motion.
Solution Approach 2:
The system uses feedback from communication circuits to monitor receiver position and adjust transmitter antenna current configurations accordingly. This feedback mechanism enables the system to maintain uniform power transmission even when the receiver is in motion, as adjustments are made based on real-time position information.
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 configuration ensures consistent and efficient power transfer across a large area with improved metal resilience and reduced material usage, while also enabling accurate and fast data communication, even with dynamic changes in receiver position and orientation.
Implementation Method 1
inductive and/or resonant 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 2
each of the plurality of modulation circuits configured to partially dampen a magnetic field, coupling the wireless power receiver system with the wireless power transmission system, based on the communication signals provided to each of the plurality of modulation circuits by the receiver controller
Data Source
AI summary
A wireless power receiver system includes a receiver antenna including a plurality of receiver coils, each of the plurality of receiver coils configured to receive alternating current (AC) wireless power signals from a wireless power transmission system. The system further includes a receiver controller configured to generate communications signals. The system further includes a plurality of modulation circuits, each of the plurality of modulation circuits operatively associated with one of the plurality of receiver coils and the receiver controller, each of the plurality of modulation circuits configured to partially dampen a magnetic field, coupling the wireless power receiver system with the wireless power transmission system, based on the communication signals provided to each of the plurality of modulation circuits by the receiver controller.