High-Frequency Generator Resonant Circuit Topology
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Solution Overview
Problem
High-frequency generators for electric surgical instruments face efficiency decreases and waveform variations when treating living tissues as high loads, due to mismatched resonant frequencies and load conditions, which can lead to inadequate or excessive tissue treatment.
Innovation Solution
A high-frequency generator design incorporating a power supply and a resonant circuit with a parallel resonant circuit having a higher resonant frequency than the series resonant circuit, optimizing efficiency by matching frequencies for both low and high load states, and stabilizing the driving signal.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If a conventional high-frequency generator uses a single resonant circuit configuration, then the circuit is simple, but the efficiency decreases and waveform variations occur when treating high load tissues
Solution Approach 1:
The resonant circuit is divided into two separate circuits: a parallel resonant circuit connected to the power supply and a series resonant circuit connected to the electric surgical instrument. This segmentation allows each circuit to be optimized for different load conditions, preventing efficiency loss during high load treatments while maintaining reasonable system complexity
Solution Approach 2:
The patent introduces dynamic frequency adjustment capability where the resonant frequencies of both parallel and series resonant circuits can be independently tuned. The parallel resonant frequency is set higher than the series resonant frequency, allowing the system to adapt to varying load conditions and maintain optimal efficiency across different tissue treatment scenarios
2Stability of the object's composition
If the resonant frequencies of parallel and series circuits are matched, then the system is simple to configure, but waveform variations occur under high load conditions
Solution Approach 1:
The patent deliberately creates an asymmetric frequency configuration where the parallel resonant frequency is set higher than the series resonant frequency. This asymmetric design allows the system to handle both low load and high load conditions effectively, preventing waveform variations during high load treatments while maintaining configurational simplicity
Solution Approach 2:
The resonant frequencies of both parallel and series circuits are treated as adjustable parameters. By setting the parallel resonant frequency higher than the series resonant frequency and allowing independent adjustment, the system achieves both waveform stability and adaptability to different load conditions
3Manufacturing precision
If a single resonant frequency is used for both low and high load states, then the circuit design is simplified, but inadequate or excessive tissue treatment occurs
Solution Approach 1:
The treatment precision is improved by segmenting the resonant circuit into parallel and series configurations, each optimized for different load states. This allows precise control over energy delivery to tissues regardless of load conditions, achieving adequate treatment precision without excessive circuit complexity
Solution Approach 2:
The dual resonant circuit system provides universal functionality by effectively handling both low load and high load states with a single integrated design. The parallel-series configuration enables the system to adapt to various tissue treatment scenarios, achieving precise treatment across different conditions without requiring multiple separate systems
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 design enhances efficiency and stability of the electric surgical instrument during high load treatments by maximizing resonant frequency alignment and minimizing frequency variations, ensuring effective and controlled tissue treatment.
Implementation Method 1
a resonant circuit that includes a parallel resonant circuit and a series resonant circuit, and excites a high-frequency signal based on the power
Implementation Method 2
the series resonant circuit being coupled to the parallel resonant circuit
Data Source
AI summary
A high-frequency generator for an electric surgical instrument that treats a living tissue includes a power supply that generates a power, and a resonant circuit that excites a high-frequency signal. The resonant circuit includes a parallel resonant circuit which is connected to the power supply, and a series resonant circuit which is coupled to the parallel resonant circuit and is connected to the electric surgical instrument. The parallel resonant circuit has a higher parallel resonant frequency than a series resonant frequency of the series resonant circuit.