CN214851167U

CN214851167U - Double-switch synchronous conduction circuit applied to pulse heavy current generator

Info

Publication number: CN214851167U
Application number: CN202121235311.8U
Authority: CN
Inventors: 徐秋朦; 吴浩; 朱恺; 张紫宸; 向红; 周林娜
Original assignee: Chongqing University
Current assignee: Chongqing University
Priority date: 2021-06-03
Filing date: 2021-06-03
Publication date: 2021-11-23
Anticipated expiration: 2031-06-03

Abstract

The utility model discloses a double-switch synchronous conduction circuit applied to a pulse heavy current generator, which comprises a first energy storage capacitor, one end of the first energy storage capacitor is connected with a coil, one end of the coil is connected with a TVS, one end of the TVS is connected with the other end of the first energy storage capacitor, one end of the TVS is connected with a logic gate circuit, a trigger device is arranged between the TVS and the logic gate circuit, the utility model relates to the technical field of pulse heavy current generators, two vacuum trigger Tubes (TVS) with better relative performance are adopted as discharge switches, by designing the FPGA gate circuit, the self-made trigger source which can control the driving to send two paths of synchronous pulse signals with extremely short rising edge (less than or equal to 160ns), extremely high amplitude (maximally up to 20kV) and adjustable pulse (2-10 mu s) is controlled, and the pulse acts on the discharge switch, so that the multiple discharge loops are synchronously switched on.

Description

Double-switch synchronous conduction circuit applied to pulse heavy current generator

Technical Field

The utility model relates to a pulse heavy current generator technical field specifically is the two synchronous switch-on circuits who is applied to pulse heavy current generator.

Background

The conduction of the ZKTC vacuum trigger switch needs to meet the requirements of the lowest trigger voltage of 5kV and the narrowest pulse width of 5 microseconds, in the trigger conduction process, the trigger voltage is applied between a trigger electrode and a cathode, when the voltage at two ends of a gap reaches the breakdown voltage, the trigger electrode and the cathode are broken down to conduct discharge, after the trigger electrode and the cathode are conducted and discharged, the trigger current is further developed, initial plasma is generated near the gap between the trigger electrode and the cathode, the initial plasma is diffused to a main gap under the action of concentration diffusion of the initial plasma and a main gap electric field, and a discharge channel is developed, so that the insulation level of the main gap is reduced, when the discharge channel penetrates through the anode and the cathode, the main gap is broken down, the arc of the switch is conducted, and loop conduction discharge is realized.

Because the minimum trigger voltage of the vacuum trigger switches with actual unified specifications still has slight difference, in order to realize the control of the quick synchronous on-off of the vacuum trigger switches, the discharge currents are overlapped to the maximum extent, two energy storage capacitors are adopted to discharge in parallel, each capacitor is provided with a switch to form two discharge units, and the double switches are used for synchronous triggering so as to realize the doubling of the output energy.

However, as the conduction voltages of different vacuum trigger switches are different all the time, the technology has the problems that the discharge loops cannot be conducted simultaneously, so that the currents cannot be superposed to the maximum extent, and energy waste is caused.

SUMMERY OF THE UTILITY MODEL

In order to achieve the above purpose, the utility model discloses a following technical scheme realizes: the double-switch synchronous conduction circuit applied to the pulse large-current generator comprises a first energy storage capacitor, wherein one end of the first energy storage capacitor is connected with a coil, one end of the coil is connected with a TVS, one end of the TVS is connected to the other end of the first energy storage capacitor, one end of the TVS is connected with a logic gate circuit, and a trigger device is arranged between the TVS and the logic gate circuit;

preferably, the trigger device comprises a direct current power supply, one end of the direct current power supply is connected with a second energy storage capacitor, one end of the second energy storage capacitor is connected with a solid-state switch, one end of the solid-state switch is connected with a control circuit, the other end of the solid-state switch is connected with a pulse transformer, and one end of the pulse transformer is connected with a vacuum trigger switch;

preferably, the direct-current power supply, the second energy storage capacitor, the solid-state switch and the control circuit form a two-stage Marx circuit.

Preferably, the logic gate circuit is an FPGA logic gate circuit.

Preferably, the TVS is a vacuum switching tube.

Preferably, the triggering device is a pulse source.

Advantageous effects

The utility model provides a be applied to two synchronous switch-on circuits of pulse heavy current generator possesses following beneficial effect: two vacuum trigger Tubes (TVS) with good relative performance are used as a discharge switch, an FPGA gate circuit is designed to control a driving source to send two paths of self-made trigger sources of synchronous pulse signals with extremely short rising edges (less than or equal to 160ns), extremely high amplitude (the maximum can reach 20kV) and adjustable pulses (2-10 mu s), and the pulses act on the discharge switch to enable multiple discharge loops to be synchronously conducted.

The charging device has the advantages of accelerating charging speed, superposing the discharging current to the maximum extent and greatly reducing energy loss.

The charging speed is accelerated. Because two capacitors are charged and discharged in parallel, when the capacitor is charged, Q is equal to CU, when the capacitor is charged in parallel, under the same voltage, the time required by charging the double capacitors is only half of that of the single capacitor to achieve the same energy as that of charging the single capacitor. The usability of the pulse high-current generator is greatly improved.

The discharge current is superposed to the maximum extent. The pulse high-current generator applied to electromagnetic pulse connection utilizes current energy as the first half part of the first extremely high amplitude current peak of the under-damped oscillation generated by RLC circuit discharge. The double-switch synchronous conduction is adopted, so that the two capacitors discharge simultaneously, the first wave crests of the currents discharged by the two parallel capacitors can be superposed to the maximum extent to release the current with the maximum energy, the performance of the pulse heavy current generator is improved, and the problem of large energy loss caused by insufficient superposition of the double-capacitor current wave crests in the traditional conduction technology is solved.

Drawings

Fig. 1 is the synchronous conduction technical system schematic diagram of the double-switch synchronous conduction circuit applied to the pulse heavy current generator.

Fig. 2 is the utility model discloses be applied to two synchronous switch-on circuit's of switch trigger source work flow of pulse heavy current generator.

In the figure: 1-a first energy storage capacitor; 2-a coil; 3-TVS; 4-logic gate circuit; 5-a trigger device; 6-a direct current power supply; 7-a second energy storage capacitor; 8-solid state switches; 9-a control circuit; 10-a pulse transformer; 11-vacuum trigger switch.

Detailed Description

Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1-2, the present invention provides a technical solution, which is applied to a dual-switch synchronous conduction circuit of a pulse heavy current generator, including a first energy storage capacitor 1, one end of the first energy storage capacitor 1 is connected with a coil 2, one end of the coil 2 is connected with a TVS3, one end of a TVS3 is connected with the other end of the first energy storage capacitor 1, one end of the TVS3 is connected with a logic gate circuit 4, and a trigger device 5 is installed between the TVS3 and the logic gate circuit 4;

in a specific implementation process, the trigger device 5 comprises a direct-current power supply 6, one end of the direct-current power supply 6 is connected with a second energy storage capacitor 7, one end of the second energy storage capacitor 7 is connected with a solid-state switch 8, one end of the solid-state switch 8 is connected with a control circuit 9, the other end of the solid-state switch 8 is connected with a pulse transformer 10, and one end of the pulse transformer 10 is connected with a vacuum trigger switch 11;

in a specific implementation process, further, the direct-current power supply 6, the second energy storage capacitor 7, the solid-state switch 8 and the control circuit 9 form a two-stage Marx circuit.

In a specific implementation process, the logic gate circuit 4 is further an FPGA logic gate circuit 4.

In a specific implementation, further, the TVS3 is a vacuum switch tube.

In a specific implementation, further, the triggering device 5 is a pulse source.

Example (b): the invention utilizes the logic gate circuit 4 to generate a control signal which acts on a self-made pulse source to generate a double-path pulse trigger signal to control the quick synchronous on-off of the vacuum trigger switch 11, thereby controlling the whole discharging process.

As shown in the figure, the logic gate circuit 4 generates pulse parameters and controls the trigger device 5 to generate a trigger signal with rising edge less than or equal to ns and large enough amplitude. The trigger signal makes TVS3(TVS) break down and conduct synchronously and quickly, and the closing of the discharge loop is realized.

The working process of the trigger device 5 is shown in the figure, the direct-current power supply 6 charges the second energy storage capacitor 7, the control circuit 9 enables the solid-state switch 8 to be conducted, so that the second energy storage capacitor 7 can release energy to generate kV pulses, the pulses are further boosted through the pulse transformer 10 with the transformation ratio, the output of the kV pulses is realized, and finally the vacuum trigger switch 11 is conducted.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. Be applied to two switch synchronous conduction circuits of pulse heavy current generator, including first energy storage capacitor, its characterized in that, first energy storage capacitor one end is connected with the coil, coil one end is connected with TVS, TVS one end connect in the first energy storage capacitor other end, TVS one end is connected with logic gate circuit, install trigger device between TVS and the logic gate circuit.

2. The dual-switch synchronous conduction circuit applied to the pulsed high-current generator according to claim 1, wherein the trigger device comprises a direct-current power supply, one end of the direct-current power supply is connected with a second energy storage capacitor, one end of the second energy storage capacitor is connected with a solid-state switch, one end of the solid-state switch is connected with a control circuit, the other end of the solid-state switch is connected with a pulse transformer, and one end of the pulse transformer is connected with a vacuum trigger switch.

3. The dual-switch synchronous conduction circuit applied to the pulsed high-current generator according to claim 2, wherein the direct-current power supply, the second energy-storage capacitor, the solid-state switch and the control circuit form a two-stage Marx circuit.

4. The dual-switch synchronous conduction circuit applied to the pulsed high-current generator according to claim 1, wherein the logic gate circuit is an FPGA logic gate circuit.

5. The dual-switch synchronous conduction circuit applied to a pulsed high current generator according to claim 1, wherein said TVS is a vacuum switching tube.

6. The dual-switch synchronous conduction circuit applied to a pulsed high-current generator according to claim 1, wherein the trigger device is a pulse source.