Shock Wave Generator Thyristor Switching Circuit
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Solution Overview
Problem
Existing shock wave generators require sophisticated and expensive switches to handle high voltages, making them unreliable and complex.
Innovation Solution
A shock wave generator with a capacitor of 1 nF to 500 mF capacity, allowing for lower charging voltages and the use of simple, reliable semiconductor switches like MOSFET thyristors, and a spark discharge section with closely spaced electrodes for efficient energy discharge.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If high voltage capacitors are used for shock wave generation, then sufficient energy can be stored, but sophisticated and expensive switches are required which reduce reliability
Solution Approach 1:
The patent changes the voltage parameter by using a capacitor with capacity between 1 nF and 500 mF that can be charged to lower voltages (500-5000 V) compared to conventional high voltage systems. This parameter change allows the use of simple semiconductor switches like MOSFETs or IGBTs instead of sophisticated high voltage switches, thereby improving reliability while maintaining sufficient energy storage for shock wave generation
Solution Approach 2:
The patent substitutes complex mechanical or electromagnetic high voltage switches with simple semiconductor electronic switches (MOSFET, IGBT). This substitution simplifies the switching mechanism, reduces cost, and improves reliability by using solid-state components that are more reliable and easier to control than conventional high voltage switching devices
2Power
If high voltage switches are used to control capacitor discharge, then sufficient power can be delivered, but the device complexity increases
Solution Approach 1:
By changing the operating voltage parameter to a lower range (500-5000 V) and using a high capacity capacitor (1 nF-500 mF), the patent enables the use of simple semiconductor switches that have fewer control requirements and simpler circuitry compared to high voltage switches, thereby reducing device complexity while maintaining adequate power delivery for therapeutic shock wave generation
Solution Approach 2:
The replacement of complex high voltage switching mechanisms with simple semiconductor switches (MOSFET, IGBT) significantly reduces circuit complexity. These semiconductor devices can be controlled with simple gate signals and require minimal protection circuitry compared to conventional high voltage switches, thereby simplifying the overall device architecture
3Device complexity
If simple semiconductor switches are used, then device cost and complexity are reduced, but handling high voltage becomes difficult
Solution Approach 1:
The patent resolves this contradiction by changing the voltage parameter to a moderate range (500-5000 V) that is high enough to provide sufficient power for shock wave generation but low enough to be safely and easily handled by simple semiconductor switches like MOSFETs and IGBTs. This parameter optimization allows standard semiconductor devices to handle the required power without needing complex high voltage infrastructure
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
Enables reliable and cost-effective operation of shock wave generators by using semiconductor switches and a spark discharge section with conductive particles for effective shock wave generation at lower voltages.
Implementation Method 1
an energy storage and a switch, wherein the energy storage is a capacitor with a capacity of between approx. 1 nF and approx. 500 mF
Implementation Method 2
a spark discharge section with closely spaced electrodes for efficient energy discharge
Implementation Method 3
a spark discharge section with closely spaced electrodes for efficient energy discharge
Data Source
AI summary
The invention relates to a device for the generation of shock waves for medical therapy, having a shock source, an energy storage and a switch, wherein the energy storage is a capacitor with a high capacity.