Wireless Power Transmission Device Standby Power Reduction
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Solution Overview
Problem
Current wireless power transmission technologies face challenges in efficiently transmitting medium power to kitchen appliances, as they often require radiating high-power current signals, which can be difficult to implement and do not satisfy electromagnetic regulations, and existing communication methods are inefficient for medium power applications.
Innovation Solution
A wireless power transmission device equipped with a short-range communication module that senses the presence of a wireless power reception device before initiating power transmission, allowing for reduced standby power consumption and efficient communication using NFC and Bluetooth Low Energy protocols, enabling the device to operate in a standby mode without radiating high-power signals until the reception device is detected.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If high-power current signals are radiated for wireless power transmission, then power transmission capability is improved, but electromagnetic regulation compliance deteriorates
Solution Approach 1:
The system uses periodic detection cycles with multiple threshold levels (first threshold for detection, second threshold for power transmission). The transmission device periodically checks for reception devices using low-power detection signals, and only transitions to high-power transmission when properly authenticated, thus maintaining electromagnetic compliance while enabling power transmission capability.
Solution Approach 2:
The system performs preliminary detection and authentication actions before initiating high-power transmission. The transmission device first sends detection signals, receives response signals, and verifies device identity before allowing power transmission, ensuring that high-power signals are only radiated when necessary and regulated.
2Power
If high-power current signals are radiated for wireless power transmission, then power transmission capability is improved, but implementation difficulty increases
Solution Approach 1:
The power transmission process is segmented into distinct phases: detection phase (using low-power signals), authentication phase (using communication protocols), and power transmission phase (using high-power signals). This segmentation allows each phase to be optimized independently, reducing overall implementation difficulty while maintaining power transmission capability.
Solution Approach 2:
The system introduces communication protocols (NFC, Bluetooth Low Energy) as intermediaries between the transmission device and reception device. These intermediaries facilitate device identification, authentication, and parameter negotiation before power transmission begins, simplifying the overall implementation by handling complex control tasks through standardized communication interfaces.
3Reliability
If wireless power transmission device operates continuously, then power transmission readiness is improved, but standby power consumption increases
Solution Approach 1:
The transmission device operates in periodic detection cycles rather than continuously radiating high-power signals. During standby mode, it uses low-power detection signals at intervals to check for reception devices, significantly reducing power consumption while maintaining readiness to transmit power when needed.
Solution Approach 2:
The system dynamically adjusts its operational state based on detected conditions. It transitions between standby mode (low power consumption) and active transmission mode (high power output) according to the presence and authentication status of reception devices, optimizing the balance between readiness and energy 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
This approach minimizes standby power consumption and enhances communication efficiency, allowing for effective wireless power transmission to medium power devices while adhering to electromagnetic regulations, thus improving the overall performance and efficiency of wireless charging systems for kitchen appliances.
Implementation Method 1
a magnetic inductive wireless power transmission has published a standard document
Implementation Method 2
the first communication module may be provided in the power transmission areas and configured to sense a wireless power reception device located in the relevant power transmission area
Data Source
Figure 1~2B
Figure 3
Figure 4A~4B
AI summary
The present invention relates to a wireless power transmission device, a wireless power reception device, and a wireless charging system in a wireless power transmission field. The wireless power transmission device according to the present invention comprises: a power conversion unit having a plurality of transmission coils formed to transmit wireless power; a first communication module for sensing a wireless power reception device located in any one of power transmission areas respectively corresponding to the plurality of transmission coils; a second communication module for transmitting/receiving, through the first communication module, a power control message to/from the wireless power reception device, by corresponding to the sensing of the wireless power reception device located in any one power transmission area; and a control unit for transmitting, on the basis of the power control message, wireless power to the wireless power reception device located in any one power transmission area through a transmission coil arranged to correspond to any one power transmission area.