伪火花开关管通导脉冲大电流的理论研究与测试分析

发布时间：2018-03-19 23:28

本文选题：伪火花开关管　切入点：空心阴极效应　出处：《北京化工大学》2015年硕士论文　论文类型：学位论文

【摘要】：电真空开关器件由于它的高耐压能力在高电压大电流领域有着不可替代的作用。本文涉及的具有空心阴极结构的伪火花开关管,是一种工作在帕邢曲线左支的新型的低气压冷阴极脉冲功率调制开关,它的工作原理是基于气体放电理论,通过触发空心阴极效应,从而产生大量的电子,最终导通伪火花开关管。相比于传统电真空开关器件,它具有放电电流大、工作电路简单以及寿命长的明显优势。笔者在读研期间,参与了关于伪火花开关管的设计,成功研制出了可以稳定触发、导通的伪火花开关管。工作中,搭建了有效简洁的测试电路,对伪火花开关管的性能进行测试分析,给出了伪火花开关管工作的放电波形,从理论角度研究了伪火花开关管放电过程的各个阶段,补充了伪火花开关管的放电理论。并找出影响伪火花开关管性能的主要因素,针对影响其触发性能和放电性能的因素进行了对比测试实验。通过对伪火花开关管触发性能和放电性能的相关因素对比实验的结果分析,发现了伪火花开关管在设计方面还有一些不足,针对原设计中耐压偏低和触发电压过高的问题,对伪火花开关管进行了结构上的改进。随后,在相同测试条件下,对伪火花开关管改进前后的性能进行了对比测试实验,对比了改进前后伪火花开关管的性能并对其进行理论分析,验证了改进方法的可行性。
[Abstract]:Because of its high voltage resistance, the vacuum switch device plays an irreplaceable role in the field of high voltage and high current. The pseudo-spark switch with hollow cathode structure is discussed in this paper. It is a new type of low pressure cold cathode pulse power modulation switch working on the left side of the Pasing curve. Its working principle is based on the theory of gas discharge, and by triggering the hollow cathode effect, a large number of electrons are produced. Compared with the traditional vacuum switch, it has the advantages of large discharge current, simple working circuit and long life. The author took part in the design of pseudo-spark switch during his graduate school. The pseudo-spark switch can be stably triggered and switched on successfully. In the work, an effective and concise test circuit is built, the performance of the pseudo-spark switch is tested and analyzed, and the discharge waveform of the pseudo-spark switch is given. In this paper, the discharge process of pseudo-spark switch tube is studied theoretically, the discharge theory of pseudo-spark switch tube is supplemented, and the main factors influencing the performance of pseudo-spark switch tube are found out. The factors affecting the trigger performance and discharge performance of pseudo-spark switch tube are compared and tested, and the results of the experiment are analyzed by comparing the relevant factors of trigger performance and discharge performance of pseudo-spark switch tube. It is found that there are still some deficiencies in the design of pseudo-spark switch tube. In view of the problems of low voltage and high trigger voltage in the original design, the structure of pseudo-spark switch tube is improved. Then, under the same test conditions, The performance of pseudo-spark switch before and after improvement is compared and tested. The performance of pseudo-spark switch before and after improvement is compared and the theoretical analysis is carried out to verify the feasibility of the improved method.
【学位授予单位】：北京化工大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TN103

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