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CN103490756B - Four-electrode bipolar pulse triggering gas switch and triggering method thereof - Google Patents

Four-electrode bipolar pulse triggering gas switch and triggering method thereof Download PDF

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CN103490756B
CN103490756B CN201310379248.9A CN201310379248A CN103490756B CN 103490756 B CN103490756 B CN 103490756B CN 201310379248 A CN201310379248 A CN 201310379248A CN 103490756 B CN103490756 B CN 103490756B
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electrode
trigger
positive
negative polarity
polarity
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CN103490756A (en
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尹佳辉
姜晓峰
魏浩
张众
王志国
党腾飞
孙凤举
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Northwest Institute of Nuclear Technology
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Abstract

本发明一种四电极双极性脉冲触发气体开关,包括绝缘外筒、分别设置在绝缘外筒两端的正极性高压电极和负极性高压电极、设置在正极性高压电极和负极性高压电极之间的触发电极、设置在绝缘外筒内的工作介质;正极性高压电极和负极性高压电极分别接正负极直流高压;触发电极包括负极性触发电极和正极性触发电极;正极性触发电极和负极性触发电极分别接正负极触发脉冲;负极性触发电极与正极性高压电极相邻,正极性触发电极与负极性高压电极相邻。本发明解决了现有气体开关对触发脉冲幅值的要求较高,且开关自击穿过程的过电压系数较低的技术问题。

A four-electrode bipolar pulse trigger gas switch of the present invention comprises an insulating outer cylinder, a positive high-voltage electrode and a negative high-voltage electrode respectively arranged at both ends of the insulating outer cylinder, and is arranged between the positive high-voltage electrode and the negative high-voltage electrode The trigger electrode and the working medium set in the insulating outer cylinder; the positive high-voltage electrode and the negative high-voltage electrode are respectively connected to the positive and negative DC high voltage; the trigger electrode includes a negative trigger electrode and a positive trigger electrode; a positive trigger electrode and a negative The polarity trigger electrodes are respectively connected to positive and negative polarity trigger pulses; the negative polarity trigger electrodes are adjacent to the positive polarity high voltage electrodes, and the positive polarity trigger electrodes are adjacent to the negative polarity high voltage electrodes. The invention solves the technical problems that the existing gas switch has high requirements on the trigger pulse amplitude and the overvoltage coefficient in the self-breakdown process of the switch is low.

Description

四电极双极性脉冲触发气体开关及其触发方法Four-electrode bipolar pulse trigger gas switch and its trigger method

技术领域technical field

本发明涉及一种四电极双极性脉冲触发气体开关,主要特点是采用正负两种极性充电,并采用正负两种极性脉冲交替进行触发,可以实现低的触发阈值与低抖动。The invention relates to a four-electrode bipolar pulse trigger gas switch, which is mainly characterized in that positive and negative polarities are used for charging, and positive and negative polarity pulses are alternately used for triggering, which can realize low trigger threshold and low jitter.

背景技术Background technique

开关在脉冲功率装置中具有重要作用,其性能直接影响装置的输出特性。由于气体开关的工作电压高、通流能力强、导通速度快、导通后的电阻及电感小,而且还可以重复使用,因此应用最广泛。但与固体开关相比,气体开关的触发阈值较高。Switches play an important role in pulsed power devices, and their performance directly affects the output characteristics of the device. The gas switch is the most widely used due to its high working voltage, strong flow capacity, fast conduction speed, small resistance and inductance after conduction, and can be reused. However, gas switches have a higher trigger threshold compared to solid state switches.

现有的气体开关大多采用单路单极性脉冲进行触发,要求触发脉冲的幅值高、前沿陡。Most of the existing gas switches are triggered by a single unipolar pulse, which requires a high amplitude and a steep leading edge of the trigger pulse.

以西北核技术研究所研制的±100kV三电极场畸变气体火花开关为例(魏浩等发表在《强激光与粒子束》第24卷第4期第881页,“±100kV三电极场畸变气体火花开关”),开关由两个平球头高压电极与一个圆盘触发电极构成。在触发前,高压电极的电势分别为+100kV和-100kV,触发电极的电势为0;施加+140kV触发脉冲后,触发电极与-100kV高压电极先发生击穿,触发电极电位变为-100kV,在过电压及间隙放电的作用下,触发电极再与+100kV高压电极发生击穿,整个开关导通。开关击穿分散主要发生在第二个过程(自击穿过程)。假设开关的工作系数(工作电压与击穿电压之比)为0.7,则开关自击穿过程的过电压系数(施加电压与击穿电压之比)为1.4。Take the ±100kV three-electrode field-distorted gas spark switch developed by the Northwest Institute of Nuclear Technology as an example (Wei Hao et al. Spark switch"), the switch consists of two flat ball head high voltage electrodes and a disc trigger electrode. Before triggering, the potentials of the high-voltage electrodes are +100kV and -100kV respectively, and the potential of the trigger electrode is 0; after the +140kV trigger pulse is applied, the trigger electrode and the -100kV high-voltage electrode first break down, and the potential of the trigger electrode becomes -100kV. Under the action of overvoltage and gap discharge, the trigger electrode will break down with the +100kV high voltage electrode, and the whole switch will be turned on. Switch breakdown dispersion mainly occurs in the second process (self-breakdown process). Assuming that the working coefficient of the switch (the ratio of the operating voltage to the breakdown voltage) is 0.7, the overvoltage coefficient (the ratio of the applied voltage to the breakdown voltage) of the switch from the breakdown process is 1.4.

现有的气体开关对触发脉冲幅值的要求较高,且开关自击穿过程的过电压系数较低,限制了开关在脉冲功率装置中的应用。Existing gas switches have high requirements on the trigger pulse amplitude, and the overvoltage coefficient in the self-breakdown process of the switch is low, which limits the application of the switch in pulse power devices.

发明内容Contents of the invention

本发明的目的是提供一种四电极双极性脉冲触发气体开关及其触发方法,解决了现有气体开关对触发脉冲幅值的要求较高,且开关自击穿过程的过电压系数较低的技术问题。The purpose of the present invention is to provide a four-electrode bipolar pulse trigger gas switch and its trigger method, which solves the problem that the existing gas switch has high requirements on the trigger pulse amplitude, and the overvoltage coefficient of the switch self-breakdown process is low technical problems.

本发明的技术解决方案:Technical solution of the present invention:

一种四电极双极性脉冲触发气体开关,包括绝缘外筒5、分别设置在绝缘外筒两端的正极性高压电极1和负极性高压电极4、设置在正极性高压电极1和负极性高压电极4之间的触发电极、设置在绝缘外筒5内的工作介质;所述正极性高压电极1和负极性高压电极4分别接正负极直流高压;其特殊之处在于:A four-electrode bipolar pulse-triggered gas switch, comprising an insulating outer cylinder 5, a positive high-voltage electrode 1 and a negative high-voltage electrode 4 respectively arranged at both ends of the insulating outer cylinder, and a positive high-voltage electrode 1 and a negative high-voltage electrode arranged on the two ends of the insulating outer cylinder. The trigger electrode between 4 and the working medium arranged in the insulating outer cylinder 5; the positive high-voltage electrode 1 and the negative high-voltage electrode 4 are respectively connected to the positive and negative DC high voltage; the special features are:

所述触发电极包括负极性触发电极2和正极性触发电极3;The trigger electrodes include a negative polarity trigger electrode 2 and a positive polarity trigger electrode 3;

所述正极性触发电极3和负极性触发电极2分别接正负极触发脉冲;The positive polarity trigger electrode 3 and the negative polarity trigger electrode 2 are respectively connected to positive and negative polarity trigger pulses;

所述负极性触发电极2与正极性高压电极1相邻,所述正极性触发电极3与负极性高压电极4相邻。The negative polarity trigger electrode 2 is adjacent to the positive polarity high voltage electrode 1 , and the positive polarity trigger electrode 3 is adjacent to the negative polarity high voltage electrode 4 .

上述正极性高压电极1、负极性触发电极2、正极性触发电极3、负极性高压电极4之间等间距。The above-mentioned positive polarity high-voltage electrode 1 , negative polarity trigger electrode 2 , positive polarity trigger electrode 3 , and negative polarity high-voltage electrode 4 are equally spaced.

上述正极性高压电极1、负极性触发电极2、正极性触发电极3、负极性高压电极4之间的距离均为6mm。The distances between the positive high-voltage electrode 1 , the negative trigger electrode 2 , the positive trigger electrode 3 , and the negative high-voltage electrode 4 are all 6 mm.

上述正极性高压电极1和负极性高压电极4之间施加±100kV直流高压;所述负极性触发电极2和正极性触发电极3之间施加±70kV的触发脉冲。A DC high voltage of ±100kV is applied between the positive high voltage electrode 1 and the negative high voltage electrode 4; a ±70kV trigger pulse is applied between the negative trigger electrode 2 and the positive trigger electrode 3.

上述工作介质为六氟化硫气体或氮气。The above-mentioned working medium is sulfur hexafluoride gas or nitrogen.

上述四电极双极性脉冲触发气体开关同时触发的方法,其特殊之处在于,包括以下步骤:The above-mentioned four-electrode bipolar pulse trigger method for simultaneous triggering of gas switches is special in that it includes the following steps:

1】开关呈断开状态,正极性高压电极1和负极性高压电极4之间分别施加正负极直流高压;1) The switch is in the off state, and the positive and negative DC high voltages are respectively applied between the positive high voltage electrode 1 and the negative high voltage electrode 4;

2】正极性触发电极3和负极性触发电极2之间同时施加正负极触发脉冲;2) Simultaneously apply positive and negative trigger pulses between the positive polarity trigger electrode 3 and the negative polarity trigger electrode 2;

3】正极性高压电极1与负极性触发电极2之间以及正极性触发电极3与负极性高压电极4之间分别发生击穿;3) Breakdown occurs between the positive polarity high voltage electrode 1 and the negative polarity trigger electrode 2 and between the positive polarity trigger electrode 3 and the negative polarity high voltage electrode 4 respectively;

4】负极性触发电极2与正极性触发电极3之间发生击穿,气体开关导通。4] A breakdown occurs between the negative polarity trigger electrode 2 and the positive polarity trigger electrode 3, and the gas switch is turned on.

上述正极性高压电极1和负极性高压电极4之间分别施加±100kV直流高压;所述正极性触发电极3和负极性触发电极2之间同时施加±70kV的触发脉冲。A DC high voltage of ±100 kV is respectively applied between the positive high voltage electrode 1 and the negative high voltage electrode 4 ; a trigger pulse of ±70 kV is simultaneously applied between the positive trigger electrode 3 and the negative trigger electrode 2 .

上述四电极双极性脉冲触发气体开关微调时序触发的方法,其特殊之处在于:包括以下步骤:The above-mentioned four-electrode bipolar pulse trigger gas switch fine-tuning timing trigger method is special in that it includes the following steps:

1】开关呈断开状态,正极性高压电极1和负极性高压电极4之间分别施加正负极直流高压;1) The switch is in the off state, and the positive and negative DC high voltages are respectively applied between the positive high voltage electrode 1 and the negative high voltage electrode 4;

2】正极性触发电极3施加正极性触发脉冲;2] Positive polarity trigger electrode 3 applies a positive polarity trigger pulse;

3】负极性高压电极4与正极性触发电极3之间发生击穿;3) A breakdown occurs between the negative polarity high voltage electrode 4 and the positive polarity trigger electrode 3;

4】负极性触发电极2施加负极性触发脉冲;4) Negative polarity trigger electrode 2 applies a negative polarity trigger pulse;

5】正极性高压电极1与负极性触发电极2之间发生击穿;5] A breakdown occurs between the positive high voltage electrode 1 and the negative trigger electrode 2;

6】负极性触发电极2与正极性触发电极3之间发生击穿,气体开关导通。6] A breakdown occurs between the negative polarity trigger electrode 2 and the positive polarity trigger electrode 3, and the gas switch is turned on.

上述正极性高压电极1和负极性高压电极4之间分别施加±100kV直流高压;所述正极性触发电极3和负极性触发电极2之间分别施加±70kV的触发脉冲。A DC high voltage of ±100 kV is applied between the positive high-voltage electrode 1 and the negative high-voltage electrode 4 ; a trigger pulse of ±70 kV is applied between the positive trigger electrode 3 and the negative trigger electrode 2 .

本发明的有益效果:Beneficial effects of the present invention:

1、本发明气体开关的稳定性高。1. The gas switch of the present invention has high stability.

如果开关包含两个触发电极,而且采用两路极性相反的脉冲同时或按时序交替进行触发,则可以大大降低开关对触发脉冲幅值的要求,而且可以提高开关自击穿过程的过电压系数。If the switch contains two trigger electrodes, and two pulses with opposite polarities are used to trigger simultaneously or alternately in time sequence, the requirement of the switch on the trigger pulse amplitude can be greatly reduced, and the overvoltage coefficient of the switch self-breakdown process can be improved .

假定开关高压电极的电势仍为±100kV,开关四电极之间为等间隙,由于电压在开关的高压电极与触发电极之间近似均等分布,因此两个触发电极的电势分别为±33.3kV,施加两路脉冲触发后触发电极的电势变为±100kV。当开关的工作系数仍为0.7时,自击穿过程的过电压系数为2.1,因此本发明涉及的四电极双极性触发开关的稳定性会优于三电极单脉冲触发的气体开关。Assuming that the potential of the high voltage electrode of the switch is still ±100kV, and the gaps between the four electrodes of the switch are equal, since the voltage is approximately evenly distributed between the high voltage electrode and the trigger electrode of the switch, the potentials of the two trigger electrodes are respectively ±33.3kV. After the two pulses are triggered, the potential of the trigger electrode becomes ±100kV. When the working coefficient of the switch is still 0.7, the overvoltage coefficient in the self-breakdown process is 2.1, so the stability of the four-electrode bipolar trigger switch involved in the present invention is better than that of the three-electrode single-pulse trigger gas switch.

2、本发明气体开关的触发时延、触发阈值及抖动低,对触发脉冲幅值的要求低。2. The trigger time delay, trigger threshold and jitter of the gas switch of the present invention are low, and the requirement for the trigger pulse amplitude is low.

本发明考虑了气体开关充电电压与触发脉冲之间的极性配合,采用正负两种极性脉冲交替进行触发,并可以通过微调触发脉冲的时序来控制开关的导通过程,有利于减小开关的触发时延与抖动。与原有三电极单极性触发开关相比,采用双极性脉冲触发时,触发脉冲的幅值仅为原有方式的一半。The invention considers the polarity coordination between the charging voltage of the gas switch and the trigger pulse, adopts positive and negative polarity pulses to trigger alternately, and can control the conduction process of the switch by fine-tuning the timing of the trigger pulse, which is beneficial to reduce Switch trigger delay and jitter. Compared with the original three-electrode unipolar trigger switch, when the bipolar pulse trigger is used, the amplitude of the trigger pulse is only half of the original method.

如前所述,原有三电极单极性触发开关,触发电极与一侧高压电极击穿后,剩余一侧的间隙靠过电压击穿,过电压系数为开关2倍的工作系数。本发明涉及的开关为四电极结构,高压电极与触发电极击穿后,剩余间隙的过电压系数为开关3倍的工作系数。由导通过程的分析可知,同时触发或是按微调时序触发,均有利于实现开关低的触发阈值与低抖动。同时触发时,由于放电在多个间隙内同时发生,还有利于减小开关的触发时延。As mentioned above, in the original three-electrode unipolar trigger switch, after the trigger electrode and one side of the high-voltage electrode break down, the gap on the remaining side is broken down by overvoltage, and the overvoltage coefficient is twice the working coefficient of the switch. The switch involved in the present invention has a four-electrode structure. After the high-voltage electrode and the trigger electrode break down, the overvoltage coefficient of the remaining gap is three times the working coefficient of the switch. From the analysis of the turn-on process, it can be known that triggering at the same time or triggering according to the fine-tuning timing is beneficial to realize the low trigger threshold and low jitter of the switch. When triggering at the same time, because the discharge occurs simultaneously in multiple gaps, it is also beneficial to reduce the triggering time delay of the switch.

附图说明Description of drawings

图1是本发明四电极双极性脉冲触发气体开关的纵剖面结构图;Fig. 1 is the longitudinal sectional structural diagram of four-electrode bipolar pulse trigger gas switch of the present invention;

图中:1-正极性高压电极,2-负极性触发电极,3-正极性触发电极,4-负极性高压电极,5-绝缘外筒。In the figure: 1-positive high-voltage electrode, 2-negative trigger electrode, 3-positive trigger electrode, 4-negative high-voltage electrode, 5-insulated outer cylinder.

具体实施方式detailed description

本发明涉及一种四电极结构的气体开关,包含两个高压电极与两个触发电极,并采用正负两种极性的脉冲触发。在触发瞬间,高压电极与触发电极上的电压极性按正、负、正、负顺序交替。The invention relates to a gas switch with a four-electrode structure, which includes two high-voltage electrodes and two trigger electrodes, and is triggered by pulses of positive and negative polarities. At the moment of triggering, the voltage polarity on the high-voltage electrode and the trigger electrode alternates in the order of positive, negative, positive, and negative.

图1是本发明的纵剖面结构图。该四电极开关最高工作电压可达±100kV,采用±70kV脉冲进行触发。高压电极与触发电极、触发电极与触发电极之间为等间距,均为6mm,工作介质可采用六氟化硫气体、氮气或是二者的混合。Fig. 1 is a longitudinal sectional structure diagram of the present invention. The four-electrode switch has a maximum working voltage of ±100kV and is triggered by a pulse of ±70kV. The distance between the high-voltage electrode and the trigger electrode, and between the trigger electrode and the trigger electrode is 6mm. The working medium can be sulfur hexafluoride gas, nitrogen gas or a mixture of the two.

同时触发时,本发明的工作过程如下:(1)开关呈断开状态,高压电极分别施加±100kV直流高压,开关四电极之间为等间隙,电压在开关的高压电极与触发电极之间近似均等分布,因此触发电极的电势分别为±33.3kV;(2)两路±70kV的触发脉冲同时施加到开关的触发电极上,高压电极与触发电极之间的电势差变为170kV,平均电场强度为触发前的2.55倍,触发电极之间的平均电场强度为触发前的2.10倍;(3)高压电极与触发电极先发生击穿,触发电极电势变为±100kV,平均电场强度为触发前的3倍;(4)正负两触发电极之间发生击穿,整个开关呈导通状态。When triggering at the same time, the working process of the present invention is as follows: (1) the switch is in an off state, and the high-voltage electrodes are respectively applied with ±100kV DC high voltage, and there is an equal gap between the four electrodes of the switch, and the voltage is approximately between the high-voltage electrodes and the trigger electrodes of the switch. Evenly distributed, so the potentials of the trigger electrodes are ±33.3kV respectively; (2) Two trigger pulses of ±70kV are applied to the trigger electrodes of the switch at the same time, the potential difference between the high-voltage electrodes and the trigger electrodes becomes 170kV, and the average electric field strength is 2.55 times before the trigger, the average electric field strength between the trigger electrodes is 2.10 times before the trigger; (3) The high-voltage electrode and the trigger electrode break down first, the potential of the trigger electrode becomes ±100kV, and the average electric field strength is 3 times; (4) A breakdown occurs between the positive and negative trigger electrodes, and the entire switch is turned on.

微调时序触发时,以先施加正极性触发脉冲为例,本发明的工作过程如下:(1)开关呈断开状态,高压电极分别施加±100kV直流高压,由于开关四电极之间为等间隙,电压在开关的高压电极与触发电极之间近似均等分布,因此触发电极电势分别为±33.3kV;(2)施加+70kV的触发脉冲至正极性触发电极,此时负极性高压电极与正极性触发电极之间电势差变为170kV,平均电场强度为触发前的2.55倍;(3)开关负极性高压电极与正极性触发电极发生击穿,触发电极电势变为-100kV,而正负两触发电极之间的平均电场强度为触发前的0.55倍,不会发生击穿;(4)施加-70kV触发脉冲至负极性触发电极,此时正极性高压电极与负极性触发电极之间电势差变为170kV,平均电场强度为触发前的2.55倍,而正负两触发电极之间的平均电场强度为触发前的0.45倍,依然不会发生击穿;(5)开关正极性高压电极与负极性触发电极发生击穿,触发电极电势分别变为±100kV,平均电场强度为触发前的3倍;(6)正负两触发电极之间发生击穿,整个开关导通。When triggering the fine-tuning sequence, taking the positive polarity trigger pulse as an example first, the working process of the present invention is as follows: (1) The switch is in an off state, and the high-voltage electrodes are respectively applied with ±100kV DC high voltage. Since there are equal gaps between the four electrodes of the switch, The voltage is approximately equally distributed between the high-voltage electrode and the trigger electrode of the switch, so the potentials of the trigger electrodes are ±33.3kV; (2) Apply a trigger pulse of +70kV to the positive polarity trigger electrode, at this time, the negative polarity high-voltage electrode and the positive polarity trigger The potential difference between the electrodes becomes 170kV, and the average electric field intensity is 2.55 times that before triggering; (3) The switch negative polarity high-voltage electrode and the positive polarity trigger electrode break down, and the potential of the trigger electrode becomes -100kV, while the positive and negative trigger electrodes The average electric field strength between them is 0.55 times that before triggering, and breakdown will not occur; (4) Apply a -70kV trigger pulse to the negative polarity trigger electrode, and at this time the potential difference between the positive polarity high voltage electrode and the negative polarity trigger electrode becomes 170kV, The average electric field strength is 2.55 times that before triggering, and the average electric field strength between the positive and negative trigger electrodes is 0.45 times before triggering, and breakdown still does not occur; (5) Switch positive polarity high voltage electrode and negative polarity trigger electrode Breakdown, the potentials of the trigger electrodes become ±100kV respectively, and the average electric field strength is three times that of before triggering; (6) Breakdown occurs between the positive and negative trigger electrodes, and the entire switch is turned on.

本发明原理:Principle of the present invention:

当双极性脉冲同时交替施加到开关触发极时,开关内所有间隙同时发生电场增强并形成放电。通过优化触发电极位置,使触发电极与高压电极之间的电场较触发电极之间电场更强时,高压电极会与触发电极先击穿,之后触发电极电势改变为对应高压电极的电势,在过电压以及原有放电影响下两个触发电极之间发生击穿,整个开关导通。也可微调两路触发脉冲的施加时刻,控制开关内各间隙的导通顺序。When bipolar pulses are alternately applied to the trigger poles of the switch at the same time, all the gaps in the switch simultaneously increase the electric field and form a discharge. By optimizing the position of the trigger electrode, when the electric field between the trigger electrode and the high-voltage electrode is stronger than that between the trigger electrodes, the high-voltage electrode and the trigger electrode will break down first, and then the potential of the trigger electrode will change to the potential of the corresponding high-voltage electrode. Under the influence of the voltage and the original discharge, a breakdown occurs between the two trigger electrodes, and the entire switch is turned on. The application timing of the two trigger pulses can also be fine-tuned to control the conduction sequence of each gap in the switch.

Claims (9)

1. a kind of four electrode bipolars pulse-triggered gas switch, including insulation outer tube (5), it is separately positioned on insulation outer tube two ends Positive polarity high-field electrode (1) and negative polarity high-field electrode (4), be arranged on positive polarity high-field electrode (1) and negative polarity high-tension electricity Trigger electrode, the working media being arranged in insulation outer tube (5) between pole (4);The positive polarity high-field electrode (1) and negative pole Property high-field electrode (4) connects both positive and negative polarity high direct voltage respectively;
It is characterized in that:
The trigger electrode includes negative polarity trigger electrode (2) and positive polarity trigger electrode (3);
The positive polarity trigger electrode (3) and negative polarity trigger electrode (2) connect both positive and negative polarity trigger pulse respectively;
The negative polarity trigger electrode (2) is adjacent with positive polarity high-field electrode (1), the positive polarity trigger electrode (3) and negative pole Property high-field electrode (4) is adjacent.
2. four electrode bipolars pulse-triggered gas switch according to claim 1, it is characterised in that:The positive polarity is high Between piezoelectricity pole (1), negative polarity trigger electrode (2), positive polarity trigger electrode (3), negative polarity high-field electrode (4) equidistantly.
3. four electrode bipolars pulse-triggered gas switch according to claim 2, it is characterised in that:The positive polarity is high The distance between piezoelectricity pole (1), negative polarity trigger electrode (2), positive polarity trigger electrode (3), negative polarity high-field electrode (4) are 6mm。
4. four electrode bipolar pulse-triggered gas switch according to claim 1 or 2 or 3, it is characterised in that:It is described just Polarity high-field electrode (1) applies+100kV high direct voltages, and the negative polarity high-field electrode (4) applies -100kV high direct voltages;Institute State the trigger pulse that negative polarity trigger electrode (2) applies -70kV;The positive polarity trigger electrode (3) applies the triggering arteries and veins of+70kV Punching.
5. four electrode bipolars pulse-triggered gas switch according to claim 4, it is characterised in that:The working media For sulfur hexafluoride gas or nitrogen.
6. the method that four electrode bipolar pulse-triggered gas switch described in a kind of claim 1 are triggered simultaneously, its feature exist In comprising the following steps:
1】Switch applies both positive and negative polarity between positive polarity high-field electrode (1) and negative polarity high-field electrode (4) straight respectively in off-state Stream high pressure;
2】Apply both positive and negative polarity trigger pulse between positive polarity trigger electrode (3) and negative polarity trigger electrode (2) simultaneously;
3】Between positive polarity high-field electrode (1) and negative polarity trigger electrode (2) and positive polarity trigger electrode (3) and negative polarity are high Piezoelectricity pole punctures between (4) respectively;
4】Puncture between negative polarity trigger electrode (2) and positive polarity trigger electrode (3), gas switch conducting.
7. method according to claim 6, it is characterised in that:
The positive polarity high-field electrode (1) applies+100kV high direct voltages, and it is high that negative polarity high-field electrode (4) applies -100kV direct currents Pressure;The positive polarity trigger electrode (3) at the same apply+70kV trigger pulse, negative polarity trigger electrode (2) at the same apply- The trigger pulse of 70kV.
8. the method that the four electrode bipolar pulse-triggered gas switch fine setting sequential described in a kind of claim 1 is triggered, which is special Levy and be:Comprise the following steps:
1】Switch applies both positive and negative polarity between positive polarity high-field electrode (1) and negative polarity high-field electrode (4) straight respectively in off-state Stream high pressure;
2】Positive polarity trigger electrode (3) applies positive polarity trigger pulse;
3】Puncture between negative polarity high-field electrode (4) and positive polarity trigger electrode (3);
4】Negative polarity trigger electrode (2) applies negative polarity trigger pulse;
5】Puncture between positive polarity high-field electrode (1) and negative polarity trigger electrode (2);
6】Puncture between negative polarity trigger electrode (2) and positive polarity trigger electrode (3), gas switch conducting.
9. method according to claim 8, it is characterised in that:
The positive polarity high-field electrode (1) applies+100kV high direct voltages, and it is straight that the negative polarity high-field electrode (4) applies -100kV Stream high pressure;The negative polarity trigger electrode (2) applies the trigger pulse of -70kV;Positive polarity trigger electrode (3) applying+ The trigger pulse of 70kV.
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