Inductive Energy Transmission Resonant Circuit Tuning
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Solution Overview
Problem
Existing inductive energy transmission systems face inefficiencies, particularly in continuous operation and under changing loads or temperature conditions, due to tolerances and variations in capacitance or inductance values.
Innovation Solution
The system employs a secondary winding inductively coupled to a primary conductor with a controllable semiconductor switch to adjust the resonant frequency of an oscillating circuit, allowing for tuning during operation and compensation of capacitance or inductance changes, using capacitances connected in series or parallel to achieve efficient energy transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the resonant frequency is fixed during manufacturing, then the device complexity is reduced, but the efficiency deteriorates under changing temperature and load conditions
Solution Approach 1:
The patent implements dynamic tuning of the resonant frequency by switching between different capacitance values during operation. The oscillating circuit transitions from a static fixed-frequency design to a dynamic adjustable-frequency system, allowing the resonant frequency to adapt to changing temperature and load conditions, thereby maintaining high energy transmission efficiency without excessive complexity
Solution Approach 2:
The patent changes the electrical parameter (capacitance) of the oscillating circuit during operation to adjust the resonant frequency. By switching between different capacitance values, the system optimizes the resonant frequency to match the primary conductor current frequency, resolving the contradiction between fixed simplicity and variable efficiency
2Loss of energy
If tuning is performed during operation, then the efficiency is improved under varying conditions, but the productivity deteriorates due to interruption of energy transmission
Solution Approach 1:
The patent implements periodic tuning at predetermined time intervals rather than continuous tuning. This periodic approach allows the system to maintain high efficiency under varying conditions while minimizing interruptions to energy transmission, as the tuning occurs only occasionally rather than continuously
Solution Approach 2:
The patent performs tuning in advance at predetermined intervals before significant drift occurs. By proactively adjusting the resonant frequency periodically, the system maintains optimal efficiency without requiring continuous intervention that would interrupt productivity
3Adaptability or versatility
If multiple capacitances are switched to tune the resonant frequency, then the adaptability is improved, but the device complexity increases
Solution Approach 1:
The patent divides the total capacitance into multiple discrete capacitance elements that can be switched individually or in combinations. This segmentation allows for fine-grained adjustment of the resonant frequency across a wide range while keeping each individual switching element simple, resolving the contradiction between adaptability and complexity
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 efficient energy transmission by dynamically adjusting the resonant frequency to match the primary conductor current, maintaining high efficiency even with weak coupling and varying conditions, and allows for data transmission through modulated current components without additional means.
Implementation Method 1
a secondary winding L1 is inductively coupled to a primary conductor
Implementation Method 2
an arrangement of capacitances is connected to form an oscillating circuit of the secondary winding
Data Source
AI summary
The invention relates to an assembly and a method for operating said assembly for the inductive energy transmission to an electrical consumer, wherein a secondary coil is inductively coupled to a primary conductor and an assembly of capacitors is switched on in association to the secondary coil in order to form a resonant circuit. According to the invention, at least one of the capacitors can be switched on or off in combination with an associated controllable semiconductor switch, whereby it is essentially made active or inactive for the resonant circuit, particularly for tuning the resonance frequency of the resonant circuit to a nominal frequency, in particular to a frequency of the current injected into the primary conductor.