Wireless Power Transmission Control for Human-Safe Long Range Charging
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Solution Overview
Problem
Existing wireless power transmission methods face challenges in efficiently transmitting power over long distances, especially when a human body is present, and may interfere with communication signals due to magnetic or electric fields, affecting performance.
Innovation Solution
A wireless power transmitting device that uses a combination of power transmission circuits, control circuits, and sensors to adjust power intensity and transmission paths dynamically, ensuring safe and efficient power transfer even with obstacles present, and can transmit both power and communication signals effectively.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of stationary object
If electromagnetic wave scheme is used for remote power transmission, then power transmission distance is improved, but harmful magnetic field or electric field exposure to human body increases
Solution Approach 1:
The patent implements dynamic adjustment of power transmission parameters based on real-time detection of human body presence. The control circuit continuously monitors the transmission path and dynamically modifies power intensity, frequency, or transmission path to maintain effective power delivery while reducing harmful field exposure when humans are detected in the transmission zone.
Solution Approach 2:
The system changes operational parameters such as power intensity, frequency, and transmission path based on detected conditions. When a human body is detected, the control circuit adjusts these parameters to reduce harmful field exposure while maintaining power transmission effectiveness, thereby resolving the contradiction between transmission distance and safety.
2Loss of energy
If power transmission intensity is increased for long distance transmission, then power transmission efficiency is improved, but interference with communication signals increases
Solution Approach 1:
The patent separates power transmission and communication signal transmission into different frequency bands or time slots. By segmenting the spectral resources, the system can transmit power at high intensity for efficient energy delivery while communication signals are transmitted in protected frequency ranges, thereby minimizing interference between the two functions.
Solution Approach 2:
The control circuit acts as an intermediary that coordinates power transmission and communication signal transmission. It monitors both channels and adjusts power transmission parameters to prevent harmful interference with communication signals, ensuring both functions operate effectively simultaneously.
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
The solution enables reliable and efficient wireless power transmission over long distances while minimizing exposure to harmful fields and maintaining communication signal integrity, ensuring safe and consistent power delivery to electronic devices.
Implementation Method 1
The electromagnetic wave scheme is more advantageous in transmitting power to a distance about several meters
Implementation Method 2
transmit a communication signal toward a second section around the first section and receive a first reflected signal for the communication signal
Data Source
Figure 1A~2
Figure 3
Figure 4A
AI summary
A wireless power transmitting device according to an embodiment may include a power transmission circuit and a processor. The processor may be configured to control the power transmission circuit to wirelessly transmit power to a first area around the wireless power transmitting device, perform a predetermined first operation when an obstacle is detected in a second area around the first area, and perform a predetermined second operation when it is detected that the obstacle has entered the first area.