Wireless Power Relay Apparatus for Interference-Free Data Communication
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Solution Overview
Problem
Existing wireless power transmission systems face interference issues during data communication, particularly when using amplitude modulation, as the effect of data transmission propagates to other apparatuses, affecting both data transmission and reception accuracy.
Innovation Solution
The introduction of a relay apparatus with a relay amplitude modulator that varies the voltage amplitude between specific levels and a control circuit to eliminate differences in alternating current power, ensuring minimal variation in output amplitude during data transmission, thereby reducing interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If amplitude modulation is used for data transmission in wireless power transmission systems, then data communication capability is improved, but interference propagates to other apparatuses affecting transmission and reception accuracy
Solution Approach 1:
The patent introduces a relay apparatus as an intermediary between the power transmission apparatus and power reception apparatus. The relay apparatus receives power and data signals, processes them locally, and forwards only necessary information to the power transmission apparatus. This intermediary structure prevents direct interference propagation between transmission and reception ends, as the relay apparatus isolates and manages signal interactions.
Solution Approach 2:
The wireless power transmission system is divided into separate functional segments: power transmission apparatus, relay apparatus, and power reception apparatus. Each segment handles specific functions independently - the relay apparatus manages data communication locally while the power transmission apparatus focuses on power delivery. This segmentation allows data communication to occur without directly affecting the overall power transmission between other apparatuses.
2Length of stationary object
If relay apparatus is introduced to enable power transmission to distant devices, then transmission range is extended, but system complexity increases
Solution Approach 1:
The relay apparatus is designed with multi-functionality to reduce overall system complexity. It simultaneously performs power reception, power transmission, data communication, and signal processing functions. By consolidating these functions into a single apparatus rather than requiring separate components for each function, the system achieves extended transmission range without proportionally increasing complexity.
Solution Approach 2:
The relay apparatus merges power transmission and data communication functions into a single integrated unit. Instead of having separate relay components for power and data, the patent combines them, allowing the relay apparatus to handle both electromagnetic power transfer and modulated data signals through the same physical interface, thereby simplifying the overall system architecture.
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 effectively minimizes interference during data transmission and reception, ensuring accurate communication between apparatuses in wireless power transmission systems by controlling the amplitude of the relay alternating current power.
Implementation Method 1
a relay power reception antenna that is electromagnetically coupled with the power transmission power transmission antenna and that receives the transmitted power transmission alternating current power
Implementation Method 2
a power transmission power transmission antenna that wirelessly transmits the obtained power transmission alternating current power
Data Source
Figure 1~2A
Figure 2B
Figure 3
AI summary
A relay apparatus in a wireless power transmission system includes a relay power reception antenna that receives the power transmission alternating current power from a power transmission power transmission antenna, a relay rectifier that converts the power transmission alternating current power into relay direct current power, a relay inverter circuit that converts the relay direct current power into relay alternating current power, and a relay power transmission antenna that wirelessly transmits the relay alternating current power. When the relay apparatus has received binary relay received data, the relay apparatus reverses a sign of the binary relay received data and performs control for eliminating a difference between a first voltage (DC1) of the relay direct current power and a second voltage (DC2) of the relay direct current power on the basis of the reversed binary relay received data.