Wireless Power Resonator with Side-Channel Authentication
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Solution Overview
Problem
Current battery technology often fails to meet the charge capacity and discharge rate demands of electronic devices, limiting their mobility and requiring wired charging, which restricts usability and increases 'cord clutter' as more devices are charged simultaneously.
Innovation Solution
The development of a wireless power transfer system using resonating elements, such as common mode capacitors, to generate and couple with oscillating magnetic and electric fields, allowing for efficient power delivery between a transmitter and receiver without the need for physical wires, with features like impedance matching and side-channel communication for authentication and efficiency optimization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If wired charging is used to recharge device batteries, then power delivery reliability is improved, but device mobility and usability are reduced due to physical wire constraints and cord clutter
Solution Approach 1:
The patent replaces the mechanical wired charging system with a wireless electromagnetic field-based power transfer system. The transmitter generates an oscillating electromagnetic field that inductively couples with the receiver's coil to transfer power without physical wire connection, thereby eliminating cord clutter and improving device mobility while maintaining power delivery capability
Solution Approach 2:
The patent introduces an electromagnetic field as an intermediary medium to transfer power between the power source and the device battery. The transmitter converts electrical power to an oscillating electromagnetic field, which then inductively couples with the receiver coil to induce current and charge the battery, serving as a non-contact power transmission intermediary
2Productivity
If multiple devices are charged simultaneously via wired connection, then power delivery capacity is improved, but cord clutter and spatial complexity increase significantly
Solution Approach 1:
The wireless power transmitter is designed to simultaneously serve multiple receivers within its electromagnetic field range. The transmitter can establish inductive coupling with multiple receiver devices at once, enabling concurrent charging of multiple devices without requiring separate wired connections for each device, thus reducing spatial complexity while maintaining power delivery capacity
3Length of stationary object
If wireless power transfer uses resonating elements to extend range, then power transfer distance is improved, but power transfer efficiency deteriorates with weaker coupling
Solution Approach 1:
The patent employs resonant frequency tuning as a key parameter change to enhance power transfer efficiency at extended distances. By matching the resonant frequencies of the transmitter and receiver oscillating fields, the system achieves constructive interference and maximizes energy transfer efficiency even when the coupling between transmitter and receiver is weak, thereby resolving the trade-off between transfer distance and efficiency
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 wireless power transfer over a longer range with less stringent proximity requirements, reducing cord clutter and enhancing device mobility by maintaining high power transfer efficiency even with weak coupling, and allowing for authentication and multiplexing to prevent unauthorized power usage.
Implementation Method 1
The first common mode capacitor is configured to generate a common mode oscillating field at a common mode resonant frequency in response to receiving the power from the power source
Implementation Method 2
The second common mode capacitor is configured to resonate at the common mode resonant frequency in response to the common mode oscillating field generated by the first common mode capacitor
Implementation Method 3
The second resonator is configured to be wirelessly coupled to the first resonator to receive the power from the first resonator
Data Source
AI summary
A transmitter includes a first resonator to generate an oscillating field at a resonant frequency in response to receiving power from a power source. The transmitter includes a first communication interface and a first controller to control the first resonator and to communicate data via the first communication interface. One of a plurality of receivers includes a second resonator to be wirelessly coupled to the first resonator. The second resonator resonates at the common mode resonant frequency in response to the oscillating field. The one receiver includes a second communication interface to establish wireless side-channel communications with the first communication interface and to communicate the data with the first communication interface via the wireless side-channel communications. The first controller identifies the one receiver from the plurality of receivers according to the communicated data, and in response, the first resonator transfers the power to the second resonator.