紧凑型Marx发生器触发电源系统研究

发布时间：2018-06-24 02:55

本文选题：触发电源 + 脉冲变压器　；参考：《沈阳理工大学》2017年硕士论文

【摘要】：近年来,脉冲功率技术取得快速发展,高压脉冲放电破碎岩石技术更是获得前所未有的成绩。紧凑型Marx发生器在强功率脉冲输出时,对控制信号的有效性、稳定性和连续性的研究显得十分重要。本文主要针对触发电源系统展开研究,传统的触发电源在输出脉冲参数方面满足应用要求,但是制作工艺复杂,设计难度大,成本较高;现有产品输出脉冲的幅值、宽度和能量都不能满足使用的要求,故研制了一套用于紧凑型Marx发生器的触发电源。触发电源采用脉冲变压器提升输出脉冲幅值,脉冲形成部分主要通过两级升压方式对输入电压进行倍压输出,用数字电路生成方波信号控制电子开关,控制信号与MOS管之间采用光电模块进行隔离保护。触发电源主体部分能输出脉宽4μs的脉冲,但是脉冲前沿较缓,幅值较低,通过双绞线输入脉冲变压器模块,经过高压电容和磁开关对脉冲前沿陡化后接入脉冲变压器的初级线圈,在次级线圈得到一个脉宽2μs,最大幅值200kV,重复频率10Hz的高压脉冲信号。在触发电源实验时要对高电压和大电流进行测量,高电压一般采用分压器降压测量,大电流使用罗氏线圈进行降压转换测量。在分压器中较常用的是电阻分压器,故对其杂散参数进行了理论和仿真分析,得知高压臂对地电容对输出特性影响较大,所以在设计电阻分压器时,在低压臂加入屏蔽罩减小电磁干扰,同时减小高压臂对地电容改善输出波形。在触发简单Marx发生器的球隙开关实验中,输出脉冲对岩石靶块产生明显的破坏效果,存储能量部分转化成对岩石破碎的动能,故研制了紧凑型Marx发生器以减小内部参数对能量的损耗。在三电极开关的连续触发实验中,触发电源的输出频率满足设计要求,在高频运行下,触发的有效性和稳定性较高,可以用于紧凑型Marx发生器触发实验。触发紧凑型Marx发生器时,以金属球隙作为负载,对输出波形进行测量,用Matlab对数据进行处理拟合,绘制包络线,通过衰减系数、电容值和周期等计算出设备的内部参数。通过实验得出,触发电源满足设计和使用要求。
[Abstract]:In recent years, the pulse power technology has made rapid development, and the high voltage pulse discharge broken rock technology has obtained unprecedented achievements. It is very important to study the validity, stability and continuity of the control signal when the compact Marx generator outputs the strong power pulse. This paper mainly focuses on the research of the trigger power supply system. The traditional trigger power supply meets the application requirements in the output pulse parameters, but the manufacturing process is complex, the design is difficult and the cost is high. The width and energy can not meet the requirement of use, so a set of trigger power supply for compact Marx generator is developed. In the trigger power supply, pulse transformer is used to raise the output pulse amplitude. The pulse forming part is mainly used to double the input voltage by two stage boost mode, and the digital circuit is used to generate square wave signal to control the electronic switch. The control signal and MOS transistor are isolated and protected by optoelectronic module. The main part of the trigger power supply can output the pulse with a pulse width of 4 渭 s, but the pulse front is slower and the amplitude is lower. The pulse transformer module is input through the twisted-pair wire. After the pulse front is steeped by high voltage capacitance and magnetic switch, the primary coil of the pulse transformer is connected to the primary coil of the pulse transformer. In the secondary coil, a high voltage pulse signal with a pulse width of 2 渭 s, a maximum amplitude of 200 kV and a repetition rate of 10 Hz is obtained. The high voltage and high current should be measured in the experiment of trigger power supply. The high voltage is usually measured by the voltage divider and the high current is measured by the Roche coil. The resistance divider is commonly used in the divider, so the spurious parameters of the divider are analyzed in theory and simulation. It is known that the high-voltage arm has a great influence on the output characteristics, so in the design of the resistor divider, The shield is added to the low-voltage arm to reduce the electromagnetic interference and the high-voltage arm to the ground capacitance to improve the output waveform. In the experiment of triggering a simple Marx generator, the output pulse produces obvious damage effect on the rock target, and the storage energy is converted into kinetic energy of rock fragmentation. Therefore, a compact Marx generator is developed to reduce the energy loss caused by internal parameters. In the continuous trigger experiment of three-electrode switch, the output frequency of the trigger power meets the design requirements. Under the high frequency operation, the trigger is more effective and stable, so it can be used in the trigger experiment of compact Marx generator. When the compact Marx generator is triggered, the output waveform is measured with the metal spherical gap as the load, the data is processed and fitted by Matlab, the envelope line is drawn, and the internal parameters of the equipment are calculated through attenuation coefficient, capacitance value and period. Through the experiment, the trigger power meets the design and use requirements.
【学位授予单位】：沈阳理工大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TN86

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