Wireless Power Capacitor Segmentation for Resonance Efficiency
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Solution Overview
Problem
Conventional wireless power transmission systems face inefficiencies due to impedance mismatching and overlapping charge and transmission times, which degrade resonance power transmission efficiency.
Innovation Solution
The system employs a switching unit to control capacitors, separating power inputting and transmitting units and using multiple capacitors in parallel to prevent overlapping charge and transmission times, ensuring efficient resonance power transmission by matching operating frequencies and using efficient power amplifiers and rectifiers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single capacitor is used in wireless power transmission, then the device structure is simple, but charge and transmission times overlap causing efficiency degradation
Solution Approach 1:
The patent divides the single capacitor into multiple capacitors (first capacitor and second capacitor) that operate in separate time slots. This segmentation allows the charge time of one capacitor to not overlap with the transmission time of the other, preventing efficiency degradation while maintaining manageable device complexity.
2Duration of action of moving object
If charge time and transmission time overlap, then continuous power supply is achieved, but resonance power transmission efficiency degrades
Solution Approach 1:
The patent implements periodic switching between multiple capacitors, where each capacitor alternates between charge time and transmission time in a periodic manner. This ensures continuous power supply to the load while preventing overlap between charge and transmission phases, thereby maintaining resonance power transmission efficiency.
3Ease of operation
If impedance matching is not optimized, then device operation is simple, but power transmission efficiency decreases
Solution Approach 1:
The patent employs dynamic impedance matching by switching between different capacitor configurations and time slots to optimize impedance matching conditions. The controller dynamically adjusts the charging and transmission phases based on system state, achieving efficient power transmission while maintaining ease of operation through automated control.
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 transmission efficiency by preventing impedance mismatching and optimizing power transfer, maintaining efficiency across varying operation environments without the need for additional power amplifiers or rectifiers.
Implementation Method 1
Short-distance wireless power transmission may generate a magnetic field using a transmission coil in a given operating frequency, and may transmit the energy stored in the generated magnetic field
Implementation Method 2
Short-distance wireless power transmission may generate a magnetic field using a transmission coil in a given operating frequency, and may transmit the energy stored in the generated magnetic field by generating an induction current in a reception coil
Implementation Method 3
Wireless power transmission schemes may use a characteristic of resonance of radio frequency (RF) devices
Data Source
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AI summary
Provided is a wireless power transmission system to increase efficiency in wireless power transmission. A wireless power transmitter may include: one or more capacitors; a power inputting unit configured to receive power from a power supply and to charge the one or more capacitors; a transmitting unit configured to transmit resonance power; and a switching unit configured to control electrical connection of the one or more capacitors to the power inputting unit and to the transmitting unit. A wireless power receiver is also described.