Resonant Wireless Power Transmission with Variable Inductors
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Solution Overview
Problem
Existing systems for transmitting electrical power face challenges in efficiently powering multiple devices with a limited number of sockets, as they often result in tangled cables, inefficient energy transfer, and are not suitable for varying construction tolerances or metal interference, leading to suboptimal performance.
Innovation Solution
A system utilizing a high-frequency sinusoidal alternating current generator connected to a non-resonant transmission circuit that generates a magnetic field, paired with resonant receiver circuits and energy storage systems, which maintain tuning through a control current and variable inductors to compensate for frequency deviations and ensure efficient energy transfer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If variable capacitors are used to guarantee a certain level of energy transmission, then energy transmission is maintained, but the system cannot compensate for constructional tolerances or metal interference, resulting in phase displacement
Solution Approach 1:
The patent changes the adjustable parameter from capacitance (variable capacitors) to inductance (variable inductors). By adjusting the inductance value, the system can compensate for phase displacement caused by constructional tolerances or metal interference, while maintaining reliable energy transmission. This parameter change enables both stability and adaptability.
2Loss of energy
If resonant systems are used for wireless power transmission, then energy transmission efficiency is improved, but the system is sensitive to frequency variations and requires precise tuning
Solution Approach 1:
The patent introduces variable inductors that allow dynamic adjustment of the resonant frequency. This enables the system to maintain optimal resonance conditions despite frequency variations, achieving high energy transmission efficiency without requiring extremely precise fixed tuning. The system can adapt its resonant frequency dynamically.
Solution Approach 2:
The system employs a control unit that monitors the resonant frequency and adjusts the inductance value accordingly. This feedback mechanism ensures that the system maintains optimal resonance conditions, maximizing energy transmission efficiency while compensating for frequency drift or variations automatically.
3Productivity
If multiple users are connected to limited sockets, then power distribution is achieved, but cable clutter and tripping hazards increase
Solution Approach 1:
The patent replaces the mechanical cable-based power transmission system with a wireless electromagnetic field-based system. This substitution eliminates physical cables entirely, allowing multiple users to be powered simultaneously without cable clutter or tripping hazards, while maintaining full power distribution capacity.
4Area of stationary object
If transmission distance is increased in prior art systems, then coverage area is expanded, but energy transmission performance deteriorates
Solution Approach 1:
The patent utilizes resonant oscillation at specific frequencies (25 Hz to 5 MHz) to enhance energy transmission. By tuning the transmitter and receiver to the same resonant frequency, the system achieves efficient energy transfer over extended distances, expanding coverage area without significant performance loss.
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 system enables efficient and reliable power transmission to multiple devices, even with limited sockets, by maintaining optimal frequency tuning and energy transfer efficiency, while accommodating variations in construction tolerances and minimizing cable clutter.
Implementation Method 1
a non-resonant transmission circuit (3) connected with the current generator (2) and configured to generate a magnetic field
Implementation Method 2
at least one resonant type receiver circuit (4) in an area close to the transmission circuit (3) in such a way that a current is induced to be sent to the user
Implementation Method 3
Each receiver circuit (4) is designed to maintain a tuning between the fixed frequency of the current generator (2) and a resonance frequency of the circuit receiver (4)
Data Source
Figure 1
Figure 2~4
AI summary
Described is a system (1) for transmitting electrical power comprising a sinusoidal alternating current generator (2) which can be connected to a power supply source and operating at a non-resonant fixed frequency, a transmission circuit (3), of the non-resonant type, connected with the current generator (2) using a closed path and configured to generate a magnetic field and at least one receiver circuit (4), of the resonant type, which can be connected to a user (U) and which can be positioned in a space close to the transmission circuit to be immersed in the magnetic field generated by the transmission circuit (3) in such a way as to generate an induced current for powering the user (U). The receiver circuit (4) is designed to maintain a tuning between the fixed frequency of the current generator (2) and a resonance frequency of the circuit receiver (4).