激光触发真空开关关键行为研究

项目名称： 激光触发真空开关关键行为研究

项目编号： No.51477024

项目类型： 面上项目

立项/批准年度： 2015

项目学科： 电工技术

项目作者： 廖敏夫

作者单位： 大连理工大学

项目金额： 90万元

中文摘要： 激光真空触发开关LTVS(Laser Triggered Vacuum Switch)是一种适合于对脉冲功率进行控制的开关器件，其关键行为包含初始等离子体的产生和扩展特性以及高频动态介质恢复特性，是当前开关电器领域前沿课题之一。LTVS初始等离子体的产生和扩展以及高频动态介质恢复特性是其基础过程，对其运行特性（如时延特性、介质恢复、触发可靠性、重复频率、工作寿命及触发精度等）有重要影响。本项目旨在研究LTVS运行时初始等离子体的形成与扩散机理及高频开断机理，并研究其对主间隙导通与开断特性参数的影响，着重研究其对触发寿命、触发精度（抖动时间）、通流能力、介质恢复的影响。高精度大功率及具备一定重复频率脉冲功率开关的新结构及形式是近年来十分关注的，本项目研究LTVS的关键行为与影响因素就是在基础理论方面为这一应用扫清障碍，探索脉冲功率开关新结构形式，为新型LTVS及同步控制器的开发提供技术支持。

中文关键词： 激光触发；真空开关；等离子体；高频开断

英文摘要： TLTVS（Laser Triggered Vacuum Switch）is a suitable switch device for controlling in pulsed power system. It contains the generation and propagation of initial plasma and dynamic characteristics of high-frequency dielectric recovery. This is one of the leading subject fields of electrical switches. The generation and propagation of initial plasma and dynamic characteristics of high-frequency dielectric recovery are the fundamental processes, which have significant influence on its operating characteristics (e.g., delay characteristics, dielectric recovery, and reliability of the trigger repetition rate, working life, and trigger accuracy). The project aims to study the formation and diffusion mechanism and high-frequency interruption mechanism of LTVS initial plasma, and to study their impact on the main gap conduction and breaking characteristic parameters, which focuses on the life of the trigger, the trigger accuracy (jitter time), flow capacity, the impact of dielectric recovery. High power and high precision pulsed power switch with new structures and forms with repetition rate are of great concern in recent years. The research on key behaviors and factors of LTVS clears obstacles for the basis of the theoretical aspects of this application, and explores new structure of the pulse power switch, so that this can provide technical support for the development of new LTVS and its synchronization controller.

英文关键词： laser triggered;vacuum switch;plasma;high frequency interruption