High-Voltage Pulse Module With Triple Capacitor Voltage Addition
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Solution Overview
Problem
Existing high voltage pulse generators, such as those based on Marx and Fitch topologies, are limited in voltage multiplication to a factor of two per module, which restricts the overall output voltage and requires a larger number of modules, and do not efficiently utilize voltage addition processes.
Innovation Solution
A high voltage generator setup comprising multiple modules, each consisting of three capacitors, inductors, and switching elements, where capacitors are connected in a specific configuration to achieve triple voltage multiplication through resonant recharge and voltage addition, allowing for a momentary negative voltage and reduced magnetic core volume.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If Marx or Fitch topology is used with conventional switching elements, then the maximum voltage per module is limited to the switching element blocking voltage (or doubled with Fitch), but the overall output voltage requires more modules and the device complexity increases
Solution Approach 1:
The module is segmented into three separate capacitors (C1, C2, C3) with distinct functions: C1 stores the initial voltage, while C2 and C3 are charged to opposite polarities and then added together. This segmentation allows voltage multiplication beyond the switching element blocking voltage without requiring additional modules.
Solution Approach 2:
The voltages from capacitors C2 and C3 are merged through the inductors and switching elements to create a combined voltage that adds to the initial voltage from C1. This merging of voltages from multiple capacitors enables triple voltage multiplication within a single module.
2Strength
If more modules are connected in series to increase output voltage, then the overall voltage output increases, but the magnetic core volume and half-wave oscillation period increase
Solution Approach 1:
The invention changes the voltage multiplication parameter from 2x (conventional) to 3x (invented) by using three capacitors with specific connections. This parameter change allows achieving higher overall voltage output with fewer modules, thereby reducing the required magnetic core volume and shortening the half-wave oscillation period.
3Productivity
If conventional capacitor connections are used, then the voltage addition process is not efficiently utilized, but the voltage multiplication factor remains limited to two
Solution Approach 1:
The circuit utilizes periodic charging and discharging of capacitors C2 and C3 through inductors L2 and L3, creating oscillating current that enables efficient voltage addition. The periodic reversal of polarity in C2 and C3 allows their voltages to be added constructively to the initial voltage from C1, achieving efficient voltage multiplication.
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 configuration enables triple voltage multiplication across a single module, reducing the number of necessary modules and lowering the magnetic core volume, resulting in higher overall voltage output and shorter half-wave oscillation periods.
Implementation Method 1
The first process consists of resonant recharge of the second and third capacitor through the second and third inductor
Implementation Method 2
The second process states the addition of voltages across all three capacitors of the module
Implementation Method 3
In the generator setup as invented the second and third inductor are magnetically coupled
Data Source
Figure 1~2
Figure 3
AI summary
The invention relates to the method for shaping of high voltage pulse in a generator module, based on addition of voltages across three serially connected capacitors, where two of them, connected in parallel, change voltage polarity due to resonant recharge after bi-directional power switch operation, that connects each of the capacitors to recharge inductors and connects all three capacitors in series. The setup includes three capacitors, where the first input is connected to the first terminal of a first capacitor (C11), the second input is connected to the anode of a first diode (D11), which cathode is connected to the second terminal of the first capacitor (C11) and the first terminal of a second capacitor (C21) and the first terminal of a second inductor (L21). The second terminal of the second inductor (L21) is connected to the first terminal of a bi-directional switch (T11) and to the cathode of a third diode (DT1) and the first terminal of a third capacitor (C31). The second terminal of the third capacitor (C31) is connected with the first terminal of a third inductor (L31) and the anode of a second diode (D21) and forms the first output. The second terminal of the third inductor (L31) is connected to the anode of the third diode (DT1) and the second terminal of the bi-directional switch (T11) and the second terminal of the second capacitor (C21), the cathode of the second diode (D21) is connected with the first terminal of a first inductor (L11), the second terminal of the first inductor (L11) is connected to the first terminal of the first capacitor (C11) and forms the second output. Between the first and second input the secondary side of a transformer (Tr2) is connected which primary side (Tr1) is part of a pulse shaping circuitry (UKI).