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Circuit used for prolonging service life of two-electrode gas switch and method

A gas switch and electrode technology, applied in gas switch technology and its application fields, can solve the problems of wasted switch life potential, end of switch life, and high use cost of gas switches, so as to improve trigger reliability, reduce breakdown voltage, and improve reliability. The effect of the probability of breakdown

Active Publication Date: 2016-02-03
XI AN JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Therefore, during the use of the traditional two-electrode gas switch, when the electrode is ablated so that the working pressure is adjusted to 1 atmospheric pressure and still cannot be compensated, the life of the switch is considered to be over.
This end of life is limited by the problem of electrode ablation, and the life potential of the rest of the switch is wasted, making the cost of gas switches relatively high

Method used

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  • Circuit used for prolonging service life of two-electrode gas switch and method
  • Circuit used for prolonging service life of two-electrode gas switch and method
  • Circuit used for prolonging service life of two-electrode gas switch and method

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Embodiment 1

[0040] The high-power xenon lamp platform needs to discharge the pulse capacitor to pump energy for the flash lamp. The main discharge switch generally adopts a two-electrode graphite gas switch, such as the Shenguang 3 energy system. The two-electrode gas switch has an operating voltage of 23.5kV and a peak current of 240kA. The amount of transferred charge is 70C, the initial working pressure of the switch is 6.5bar, the leading edge of the trigger pulse is 25ns, and the peak value is 120kV. Its application circuit diagram is as follows image 3 shown. The main discharge switch is subject to strong ablation during the discharge period. After a certain number of discharges, the air pressure of the main switch is adjusted to reduce the pulse breakdown amplitude of the switch. By adding the device of the present invention, the pulse breakdown voltage amplitude of the switch under the condition of 1-2bar can be reduced by about 25kV, and when the switch air pressure is 1bar (at...

Embodiment 2

[0042] Under the condition of pulsed xenon lamp load, in order to ensure the uniform distribution of the current of each xenon lamp, a forced current sharing scheme is adopted, which is realized by dividing each discharge parameter into each xenon lamp circuit, such as the Shenguang-2 energy system commonly used at present. The discharge switch still adopts the two-electrode graphite gas switch, but the main switch adopts the scheme of grounding at one end. The specific connection method is as follows: Figure 5 As shown, the working voltage of the main switch is 23.5kV, the peak current is 170kA, the single transfer charge is: 35C, the trigger pulse amplitude is 100kV, the leading edge is 15ns, the initial air pressure of the switch is 6.5bar, and the switch can be reliable by adjusting the air pressure after a certain number of transfers. breakdown. By adding the device of the present invention, the pulse breakdown voltage amplitude of the switch under the condition of 1-2ba...

Embodiment 3

[0044] In the synthesis circuit, the two-electrode gas switch can be used as a crowbar switch to provide the load with current pulses that meet the requirements, and the working mode of the main circuit can be selected according to specific conditions Figure 5 or Image 6 Two methods, the working voltage range of the main switch: 25 ~ 5kV, the maximum peak current can reach 350kA, the maximum single transfer charge can reach: 100C / shot, the trigger pulse amplitude is 100kV, the leading edge is 50ns, and the initial pressure of the switch is 6.5bar , After a certain number of transfers, the reliable breakdown of the switch can be achieved by adjusting the air pressure. By adding the device of the present invention, the pulse breakdown voltage amplitude of the switch under the condition of 1-2bar can be reduced by about 20kV, and when the switch air pressure is 1bar (atmospheric pressure), the switch distance can be increased by an additional 1.2mm under the trigger pulse. Can...

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Abstract

The invention discloses a circuit used for prolonging the service life of a two-electrode gas switch and a method, so that the switch has the advantages of high reliability and prolonged service life. According to the technical scheme, a circuit comprises the two-electrode gas switch; a coaxial discharge gap which is used for generating ultraviolet and a charged ion diffusion effect is arranged on the two-electrode gas switch; the coaxial discharge gap is connected with an electrode of the two-electrode gas switch; the coaxial discharge gap is connected with a high voltage pulse trigger; the high voltage pulse trigger is grounded; when the two-electrode gas switch is not directly grounded, one electrode is connected with a power load, and the other electrode is connected with an energy storage capacitor; the power load and the energy storage capacitor form a loop and are grounded; when the two-electrode gas switch is directly grounded, one electrode is orderly connected in series with the power load and the energy storage capacitor, and the other electrode and the energy storage capacitor form a loop and are directly grounded.

Description

technical field [0001] The invention relates to a gas switch technology in a pulse current generator and its application field, in particular to a circuit and a method for prolonging the service life of a two-electrode gas switch. Background technique [0002] The two-electrode gas switch has the obvious advantages of conducting large current and large coulomb transfer volume. Compared with other forms of gas switches, the advantage of the two-electrode gas switch is that the electrode ablation is more uniform, so the service life is more under the same conditions. The two-electrode gas switch is mainly used for xenon lamp driving power supply of high-power solid-state neodymium glass laser, lightning current generator, and various high-current generators. [0003] Due to the two-electrode structure, the conduction process of the switch is achieved through a negative pulse overvoltage breakdown with a faster leading edge and an amplitude much higher than the self-breakdown v...

Claims

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Application Information

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IPC IPC(8): H05B41/30
Inventor 杨兰均陈立黄易之刘瞻王鹏程
Owner XI AN JIAOTONG UNIV
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