Wireless Power Receiver Capacity Adaptation
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Solution Overview
Problem
Current wireless power transmission systems face inefficiencies due to mismatches in maximum power capacity between transmitting and receiving devices, often resulting in resource waste or reduced efficiency, as they are limited to a default power capacity of 5 W, even if both devices support higher power levels.
Innovation Solution
The method and apparatus allow devices to identify and configure power capacity based on the maximum power capacity of both the transmitting and receiving devices, using a reading unit to determine the maximum power capacity by adjusting and reading dependent parameters, enabling power transmission at either the default or higher capacities compatible with the devices' capabilities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the wireless power transmission system operates at the default power capacity of 5 W, then compatibility with existing standards is maintained, but resource waste occurs when both devices support higher power levels
Solution Approach 1:
The system dynamically adjusts the power capacity from a static default value to a variable parameter. The receiving device reads dependent parameter values from the transmitting device and determines the maximum power capacity dynamically, allowing the system to adapt to different power levels (5 W, 10 W, or higher) based on device capabilities rather than being fixed at 5 W
Solution Approach 2:
The invention changes the power capacity parameter from a fixed default value to a determined maximum value based on device capabilities. By introducing a determination step that reads dependent parameters and calculates maximum power capacity, the system transitions from operating at a predetermined 5 W level to operating at an optimized power level that matches both devices' support capabilities
2Loss of information
If the system uses load modulation on the power signal for communication, then control information can be transmitted, but the communication bandwidth is limited by the same magnetic coupling used for power transmission
Solution Approach 1:
The patent introduces a proprietary packet as an intermediary communication mechanism. This packet structure enables the receiving device to send control information (such as requests to adjust independent parameters) to the transmitting device without requiring complex modifications to the existing magnetic coupling power transmission channel. The packet serves as a standardized intermediary that simplifies the communication protocol while maintaining effective control information transmission
3Productivity
If the transmitting device and receiving device have mismatched maximum power capacities, then one device may not be able to utilize the full capability of the other, but implementing power capacity detection increases system complexity
Solution Approach 1:
The receiving device performs self-service by autonomously reading the dependent parameter values from the transmitting device, determining the maximum power capacity itself, and configuring its own power reception parameters accordingly. This self-determination mechanism eliminates the need for complex centralized control or additional negotiation protocols, as each device independently ascertains the system's power capabilities through the existing magnetic coupling channel
Solution Approach 2:
The system implements feedback by having the receiving device read dependent parameter values from the transmitting device and use this information to determine maximum power capacity. This feedback loop allows the receiving device to adjust its power reception configuration based on the transmitting device's actual capabilities, ensuring optimal power transmission efficiency while matching the capabilities of both devices
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 solution enables efficient power transmission by allowing devices to adapt to their maximum supported power levels, optimizing resource use and maintaining compatibility with existing standards like the QI communication protocol, supporting transmissions between devices with varying maximum power capacities.
Implementation Method 1
Wireless power transmission is the transmission of electrical energy from a power source to an electrical load without interconnecting manmade conductors. The most common form of wireless power transmission is carried out using direct induction followed by resonant magnetic induction.
Implementation Method 2
The most common form of wireless power transmission is carried out using direct induction followed by resonant magnetic induction.
Data Source
AI summary
Method and apparatus for a receiving device to wirelessly receive electric power from a transmitting device. A power capacity is configured at the receiving device, based on a default power capacity known by both the receiving device and the transmitting device. A first value of a dependent parameter is read. The dependent parameter is associated with the electric power and varies in accordance with an independent parameter adjustable by the transmitting device. A second value of the dependent parameter is then read. A maximum power capacity of the transmitting device is identified based on at least the first and second values and a predetermined threshold. The electric power is then received from the transmitting device.