Gas Switch Pressurization Profiles for Pulsed-Power Driver Misfire Control
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Solution Overview
Problem
Conventional Marx-based pulsed-power drivers face challenges in generating high-current pulses with short rise times, leading to energy loss and structural damage, while IMG-based drivers struggle with component failures, complexity, and inefficient triggering.
Innovation Solution
A modular IMG-based pulsed-power driver with a segmented conductor design and external triggering system, featuring a voltage adder assembly and transmission line, along with a triggering system that includes a pulse distribution circuit and midplane biasing to ensure synchronized and efficient operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If conventional Marx-based generators are used to generate high-voltage pulses, then voltage levels can be achieved, but energy loss increases and thermal loads cause structural damage
Solution Approach 1:
The patent changes the operating parameters of the Marx generator by implementing a staged configuration with intermediate pulse-forming lines and switches. This divides the single high-voltage generation into multiple stages, each operating at lower voltage levels, thereby reducing energy loss and thermal loads while achieving the desired high-voltage output through cumulative effect
2Productivity
If Marx-based generators operate in repetitive mode, then continuous power delivery is achieved, but thermal loads increase causing severe structural damage or failure
Solution Approach 1:
The patent segments the Marx generator into multiple independent stages, each with its own pulse-forming line and switching mechanism. This segmentation allows heat dissipation to be distributed across multiple components rather than concentrated in a single structure, enabling repetitive operation without compromising structural integrity
3Speed
If LTD technology is used to generate high-current pulses with short rise times, then pulse quality improves, but component count increases making failures more likely
Solution Approach 1:
The patent replaces the complex mechanical switching system of LTD (with numerous physical switches and magnetic cores) with a streamlined Marx generator configuration using synchronized electrical switching. This substitution reduces the number of mechanical components that can fail while maintaining the ability to generate high-current pulses with short rise times
4Device complexity
If IMG-based drivers are used to reduce cost and weight, then component count decreases, but triggering efficiency and synchronization become problematic
Solution Approach 1:
The patent implements preliminary charging of capacitor banks in each stage before the actual pulse generation. This preliminary action allows the system to be pre-configured and synchronized, improving triggering efficiency by ensuring all components are ready and coordinated before the pulse sequence begins, thereby compensating for the reduced component count
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
The modular design enhances assembly, maintenance, and operational efficiency by reducing component failures and misfiring, while the triggering system ensures consistent pulse generation with tailored pulse shapes and reduced energy loss.
Implementation Method 1
Each internal chamber may be independently pressurized using a stage-specific air delivery subsystem configured to supply air to the internal chambers of the switches of the respective stage
Implementation Method 2
The pulsed-power driver can have a voltage adder assembly disposed (e.g., coaxially) around the transmission line with respect to the driver axis. The voltage adder assembly can include a number of stages, including one or more stages, axially distributed along the driver axis and electrically connected to one another in series
Data Source
AI summary
Methods and devices for pressurization of a pulsed-power driver are presented. According to one aspect, independent pressurization of gas switches for each stage of the pulsed-power driver is provided. Independent pressurization is provided via an air delivery system comprising a plurality of separate stage-specific air delivery subsystems. Each air delivery subsystem is further segmented according to a plurality of sectors, each sector configured to pressurize a group of gas switches. Gas switches of a group of axially adjacent stages are pressurized according to a pressurization profile that increases or decreases the pressure in a downstream direction of the driver. Gas switches of another group of axially adjacent stages are pressurized according to a constant/fixed pressure. The increasing pressurization profile to self-triggered stages reduces misfiring of the stages. The increasing/decreasing pressurization profile to self-triggered stages and the constant pressurization to externally triggered stages control a pulse shape output by the driver.