Contactless Power Transmitter Control for Receiver-Aware Output Limiting
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Solution Overview
Problem
In contactless power supply systems, excessive power transmission beyond consumption leads to waste when the power receiving device is not actively using the power, as the transmission mode remains constant regardless of the device's location or usage.
Innovation Solution
A power transmitting device that switches between a normal output mode and a limit mode based on the registered status and location of the power receiving device, adjusting the transmitted power to match the consumption needs, thereby preventing unnecessary power wastage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If the power transmission mode remains constant in normal output mode, then the power receiving device can receive sufficient power when needed, but excessive power is wasted when the device is not actively using power
Solution Approach 1:
The power transmission system dynamically switches between normal output mode and limit mode based on the presence and registration status of power receiving devices. The processing circuitry monitors device location and communication status to adjust transmission power in real-time, ensuring sufficient power supply when devices are present while reducing waste when devices are absent or not actively receiving power.
Solution Approach 2:
The system uses feedback from communication between the power transmitting device and power receiving device to determine whether to maintain normal output mode or switch to limit mode. The processing circuitry receives information about device presence and registration status, then adjusts transmission power accordingly, creating a closed-loop control system that balances power supply reliability with energy efficiency.
2Productivity
If the power transmitting device continuously transmits power at normal output level, then power availability is ensured, but energy efficiency deteriorates when no device is present
Solution Approach 1:
The power transmission system transitions from static continuous transmission to dynamic adaptive transmission. The processing circuitry continuously monitors for the presence of registered power receiving devices through communication protocols and adjusts the transmission mode accordingly, switching between normal output mode for active devices and limit mode for idle periods, thereby optimizing both productivity and energy consumption.
Solution Approach 2:
The system changes the transmission power parameter based on operational conditions. When a registered power receiving device is detected within transmission range through communication verification, the system operates in normal output mode; when no registered device is present or communication is lost, the system switches to limit mode with reduced power transmission, thus improving transmission efficiency while reducing unnecessary energy consumption.
3Adaptability or versatility
If the power transmission range is extended, then more devices can be powered, but power waste increases when devices are outside active usage area
Solution Approach 1:
The power transmission system segments the operational range into an active transmission zone and a limited transmission zone. By using communication protocols to verify device presence and registration status, the system determines whether to transmit power at full capacity or reduced capacity. This segmentation allows the system to maintain adaptability for multiple devices while preventing energy waste in areas where no registered devices are actively receiving power.
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
Efficient power transmission by ensuring the power transmission mode aligns with the active usage of the registered power receiving device, reducing waste and maintaining sufficient power supply when the device is in use while limiting power when not in use.
Implementation Method 1
a power transmission unit configured to transmit power to the power receiving device through contactless power supply
Data Source
AI summary
A power transmitting device includes a power transmission unit using contactless power supply, processing circuitry configured to switch a power transmission mode of the power transmission unit between a normal output mode and a limit mode, and a transmission-side communication unit configured to execute communication with a power receiving device. The processing circuitry is configured to determine whether the power receiving device is a registered power receiving device based on information related to the power receiving device obtained from the transmission-side communication unit, determine whether the registered power receiving device is located inside a power transmission range of the power transmission unit, set the power transmission mode to the normal output mode when determining that the registered power receiving device is located inside the range, and set the power transmission mode to the limit mode when determining that the registered power receiving device is not located inside the range.