MARX Generator Pulse Control via Sequential Triggering
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Solution Overview
Problem
Existing solid-state pulse modulating power sources based on the MARX generator principle face challenges in conveniently controlling the pulse front edge slope to maintain a stable pulse current waveform, especially when the amplitude changes frequently, as adjusting inductance is tedious and impractical for dual-energy accelerator products.
Innovation Solution
Implementing a control logic module that successively delays trigger signals to turn on discharging modules in a MARX generator, allowing for adjustable pulse front edge control without the need for an inductor in series, thereby adjusting the pulse current amplitude and eliminating uneven pulse tops.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If an inductor is connected in series to the pulse power source output to control pulse front edge slope, then the pulse current waveform stability is improved, but the device complexity and adjustment difficulty increase
Solution Approach 1:
The patent removes the inductor from the pulse power source output circuit entirely. Instead of using an inductor to control the pulse front edge slope, the invention directly controls the switching timing of the IGBT modules through delayed trigger signals, thereby eliminating the need for series inductors and their associated adjustment complexities.
Solution Approach 2:
The patent replaces the mechanical/physical adjustment of inductor inductance with an electronic control system that generates delayed trigger signals. This substitution transforms a physical component adjustment problem into an electronic timing control problem, which is more precise and easier to automate.
2Adaptability or versatility
If inductance is adjusted to match impedance for pulse current amplitude adjustment, then the pulse current amplitude control is improved, but the ease of operation deteriorates due to tedious adjustment procedure
Solution Approach 1:
The patent replaces manual inductance adjustment with an electronic control system that generates delayed trigger signals. The delay time can be precisely controlled and adjusted electronically, allowing for easy modification of pulse current amplitude without physically changing inductor components.
Solution Approach 2:
The patent introduces a dynamic control mechanism where the trigger signal delay time can be varied to adjust pulse current amplitude. This dynamic adjustment capability allows the system to adapt to different operating conditions without requiring physical reconfiguration of inductive components.
3Adaptability or versatility
If inductance adjustment is used for dual-energy accelerator products with alternating pulse current amplitude, then the pulse current amplitude adjustment capability is improved, but the ease of operation worsens as real-time adjustment cannot be realized
Solution Approach 1:
The patent implements a dynamic control system where the trigger signal delay time can be changed in real-time to adjust pulse current amplitude. This allows dual-energy accelerator products to switch between different pulse current amplitudes alternately without requiring physical reconfiguration, enabling real-time adaptation to different operating modes.
Solution Approach 2:
The patent removes the inductor-based impedance matching component that prevented real-time adjustment. By replacing it with electronic delay control, the system achieves real-time adaptability for alternating pulse current amplitude requirements in dual-energy accelerator applications.
4Device complexity
If all IGBTs are triggered simultaneously in a MARX generator, then the circuit control simplicity is improved, but the pulse front edge slope control capability deteriorates
Solution Approach 1:
The patent segments the simultaneous triggering of all IGBTs into sequential triggering with different delay times. Each IGBT module receives a trigger signal with a specific delay, allowing independent control of each module's switching timing. This segmentation enables precise control of the pulse front edge slope while maintaining relatively simple circuit architecture.
Solution Approach 2:
The patent implements periodic triggering of IGBT modules with controlled delay intervals. By applying trigger signals at different times in a periodic sequence, the system achieves pulse front edge slope control through time-based modulation rather than complex circuit configurations.
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 method enables convenient adjustment of pulse current amplitude and control of the pulse front edge slope, ensuring a stable pulse current waveform adapted to magnetron loads without the complexity of inductor adjustments.
Implementation Method 1
a control logic module for controlling the trigger signals so as to turn on the plurality of discharging modules successively with a time delay
Implementation Method 2
A MARX generator is a way of realizing a pulse modulating power source, and it is a device that is charged in parallel and then discharged in series using capacitance
Implementation Method 3
a solid-state pulse modulating power source is a power source that uses a solid-state switch, e.g. IGBT (Insulating Gate Bi-polar Transistor), to perform pulse modulation
Data Source
Figure 1~3
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AI summary
The present invention provides a pulse modulating power source, which comprises: a plurality of discharging modules connected in series during discharging; a plurality of triggers corresponding to said plurality of discharging modules, wherein each trigger provides a trigger signal to the corresponding discharging module to turn it on; a control logic module for controlling the trigger signals so as to turn on said plurality of discharging modules successively with a time delay; an output terminal for outputting a voltage.