Contactless Power Transmission Mode Switching for Obstacle Detection
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Solution Overview
Problem
Existing contactless power supply systems face inefficiencies due to the inability to select an optimal power supply path when obstacles, such as people or objects, are present between the power transmitting and receiving devices, leading to reduced power transmission efficiency.
Innovation Solution
A radiative power transmitting device with a processing circuitry that switches between normal-output and limit modes based on acquired power supply information, comparing it to pre-stored information for steady-state conditions, to adjust power transmission accordingly and limit power when obstacles are detected.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the power transmitting device transmits power through contactless power supply without path selection, then the power transmission can continue operating, but the power supply efficiency is reduced when obstacles are present
Solution Approach 1:
The patent implements dynamic switching between normal-output mode and limit mode based on real-time detection of obstacles. The power transmission mode is adjusted dynamically according to the presence of obstacles detected by the detection unit, allowing the system to adapt its operation to maintain efficiency while ensuring continuous power supply when appropriate.
Solution Approach 2:
The patent changes the power transmission parameter (output power level) based on obstacle detection results. When obstacles are detected, the system transitions from normal-output mode to limit mode, effectively changing the power transmission parameter to reduce energy loss while maintaining operational continuity.
2Loss of energy
If the power transmitting device limits power transmission when obstacles are detected, then the power supply efficiency is improved, but the power transmission may be insufficient for continuous operation
Solution Approach 1:
The system dynamically adjusts power transmission levels based on obstacle detection. When no obstacles are present, full power is transmitted; when obstacles are detected, power is limited to appropriate levels. This dynamic adjustment ensures both energy efficiency and sufficient power delivery based on actual transmission conditions.
3Adaptability or versatility
If the power transmitting device uses multiple power supply paths, then the adaptability to different environments is improved, but the device complexity increases
Solution Approach 1:
The patent segments the power transmission function into distinct operational modes (normal-output mode and limit mode) that can be selectively activated. This segmentation allows the system to adapt to different environmental conditions without requiring multiple complete power supply paths, thereby maintaining simplicity while achieving adaptability.
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 approach enhances power supply efficiency by limiting power transmission when obstacles are present, reducing energy loss and minimizing electromagnetic field leakage, while allowing continuous operation even with changing environmental conditions.
Implementation Method 1
a power transmitting unit configured to perform power transmission to the power receiving device through contactless power supply
Data Source
AI summary
A power transmitting device includes a power transmitting unit configured to perform power transmission to the power receiving device through contactless power supply, and a memory unit that stores appropriate power supply information, and processing circuitry that is configured to switch a power transmission mode of the power transmitting unit. The processing circuitry is configured to acquire power supply information in a surrounding environment at execution of the power transmission, determine whether the power supply information and the appropriate power supply information are different from each other, set the power transmission mode to a limit mode when determining that the power supply information and the appropriate power supply information are different from each other, and set the power transmission mode to a normal-output mode when determining that the power supply information and the appropriate power supply information are not different from each other.