A synchronous trigger circuit for multi-channel trigatron gas switch

Abstract

The invention discloses a synchronous trigger circuit for multiway Trigatron gas switches. The circuit comprises a high voltage direct current power supply, a charge resistor, a sphere gap, a pulse transformer, N discharge resistors and N energy storage capacitors. The number of the Trigatron gas switches is N. The synchronous trigger circuit is characterized by rapid voltage rising edge, high voltage rising edge amplitude, high discharge current, high current rising rate and high energy utilization rate. A plurality of Trigatron gas switches can be triggered synchronously.

Description

technical field [0001] The invention belongs to the technical field of synchronous triggering of pulse power and high current gas switches, and relates to a synchronous triggering circuit for multi-channel Trigatron gas switches. Background technique [0002] The Trigatron gas switch is the core component of the large pulse power supply device, and its performance directly affects the output of the pulse power supply. In large-scale pulse power supply devices, multiple gas switches are often required to work synchronously, which puts forward higher requirements on the characteristics of Trigatron gas switches such as time delay, jitter, self-discharge probability, and synchronous triggering. [0003] Trigatron gas switches are mostly triggered by pulse transformers. The working process is that the trigger pole first breaks down with the opposite high-voltage electrode, and then the trigger pole breaks down with the adjacent ground electrode to form a fast discharge process, ...

AI Technical Summary

Problems solved by technology

[0003] Trigatron gas switches are mostly triggered by pulse transformers. The working process is that the trigger pole first breaks down with the opposite high-voltage electrode, and then the trigger pole breaks down with the adjacent ground electrode to form a fast discharge process, but the switch has a high working coefficient and a narrow working range. , Disadvantages of high probability of self-discharge

In order to ensure a low self-discharge probability of the gas switch, the operating coefficient of the gas switch should generally be low. When a pulse transformer is used for triggering, the trigger pole first breaks down with the adjacent ground electrode to form a spark discharge, and the gap of the switch accelerates to reach a critical value under the action of plasma. Breakdown conditions, but the breakdown delay and jitter are large, and the trigger characteristics are greatly affected by the trigger pulse energy

Traditionally applied pulse transformer-type triggers are affected by the loop efficiency and the saturation characteristics of the transformer itself, and the trigger energy is limited. In recent years, the synthesis circuit using high voltage and high current (citing the patent "a trigger for triggering Trigatron gas switch Device", authorized announcement number CN 103248264 B) Overcame the defect of insufficient output energy of the traditional trigger, large current generates plasma jet, which greatly reduces the working coefficient and self-discharge probability of the gas switch, but the current source is directly connected to the gas At both ends of the trigger gap of the switch, in order to ensure that false triggering does not occur, the charging voltage is low. At the same time, due to the existence of the magnetic switch in the circuit, the discharge current amplitude is low and the pulse width is long. The work coefficient and delay jitter are still difficult to meet. Requirements for synchronous triggering of multiple switches

However, the trigger circuit based on the pulse transformer to trigger the multi-channel Trigatron gas switch in the fast discharge process has the disadvantages of high switch operating coefficient, narrow operating range, and high probability of self-discharge. Therefore, it is urgent to design a simple structure, low cost, and voltage frontier Fast, high amplitude, large discharge current, high current rise rate, and high energy utilization efficiency are used for multiple Trigatron gas switch synchronous trigger circuits

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