Wireless Energy Transfer System with Dynamic Frequency Control
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Solution Overview
Problem
Existing wireless energy transmission systems do not effectively consider the operating state of the transmission device or load when selecting resonant or transmission frequencies, leading to suboptimal energy transfer efficiency.
Innovation Solution
A method and device that adjust capacitance and transmission frequency based on operating parameters and mutual inductance to create transfer functions with multiple maxima or a plateau, allowing for efficient energy transfer even when the transmission frequency deviates from the resonant frequency, and include a control unit for closed-loop power regulation and redundancy in information transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the resonant frequency or transmission frequency is selected without considering the operating state of the transmission device or load, then the system operation is simplified, but the energy transfer efficiency is suboptimal
Solution Approach 1:
The patent applies dynamics by making the resonant frequency adjustable based on operating conditions. The system transitions from a fixed frequency approach to a dynamic frequency selection method where the resonant frequency is adapted according to the operating state and load conditions, thereby optimizing energy transfer efficiency without excessive complexity
Solution Approach 2:
The patent changes the frequency parameter dynamically based on operating state and load. By adjusting the resonant frequency parameter according to measured operating conditions and mutual inductance, the system achieves optimal energy transfer efficiency across varying operational scenarios rather than relying on a fixed frequency setting
2Loss of energy
If the transmission frequency is set to exactly match the resonant frequency for maximum efficiency, then energy transfer efficiency is optimized, but the system becomes sensitive to frequency deviations and interference
Solution Approach 1:
The patent applies local quality by creating transfer functions with multiple local maxima (peaks) rather than a single sharp maximum. This allows the system to operate at different frequency points (including away from the exact resonant frequency) while still achieving sufficient transfer function values, thereby providing robustness against frequency deviations and electromagnetic interference
Solution Approach 2:
The patent provides beforehand cushioning by designing the transfer function to have a plateau or multiple maxima. This creates a buffer zone where frequency deviations do not immediately result in poor performance. The system is pre-configured to tolerate frequency variations and interference through the shaped transfer function characteristics
3Reliability
If the capacitance is adjusted to create transfer functions with multiple maxima or plateau, then the system becomes more robust to frequency deviations, but the device complexity increases
Solution Approach 1:
The patent changes the capacitance parameter to shape the transfer function characteristics. By adjusting the capacitance value, the system creates transfer functions with multiple maxima or plateau regions, which provide robustness against frequency deviations. This parameter change approach achieves reliability improvement through controlled modification of electrical parameters
4Loss of energy
If the resonant frequency of the primary circuit is tuned to exactly match the secondary circuit, then maximum energy transfer is achieved, but the adaptability to varying load conditions is reduced
Solution Approach 1:
The patent applies dynamics by making the resonant frequency adjustable based on operating conditions. The system transitions from a fixed frequency approach to a dynamic frequency selection method where the resonant frequency is adapted according to the operating state and load conditions, thereby optimizing energy transfer efficiency without excessive complexity
Solution Approach 2:
The patent uses feedback by measuring the operating state and mutual inductance, then using this information to determine the appropriate resonant frequency. The control unit receives feedback about system conditions and adjusts the frequency accordingly, enabling adaptability to varying load conditions while maintaining efficient energy transfer
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 enables flexible and reliable energy transmission with improved efficiency by optimizing power transfer characteristics for varying load conditions and electromagnetic interference, ensuring robust and efficient energy delivery.
Implementation Method 1
devices from the prior art use the mutual inductance of two windings in order to transmit energy via an electromagnetic field
Implementation Method 2
a primary circuit, which has a winding and an adjustable capacitance for setting a resonant frequency of the primary circuit
Data Source
Figure 1
Figure 2~3
Figure 4
AI summary
The method involves determining a mutual induction of a winding (11) to another winding (12). An adjustable capacitor (21) is adjusted based on an operating parameter and the determined induction, where the parameter contains information about a load (40) e.g. pump, of a secondary circuit and/or information about an energy source of a primary circuit. A transmitting frequency is adjusted based on the operating parameter and the mutual induction. Energy is transferred with the adjusted capacitor and the adjusted frequency. A transferred power is regulated by adjusting a transmitting power. An independent claim is also included for a device for wireless transfer of energy.