High output amplitude electric pulse trigger and electric pulse generation method

Abstract

The application relates to a high-output-amplitude electric pulse trigger and an electric pulse generation method, which are applied to a large-scale pulse power driving source required to trigger a large-scale gas switch, and solve the technical problem that existing electric pulse triggers are difficult to meet the requirements of high output amplitude (hundreds of kV), fast front edge and high stability. The high-output-amplitude electric pulse trigger comprises a cover plate, a box body, a front-stage trigger, a main trigger connected with the front-stage trigger through a trigger pulse transmission assembly; the front-stage trigger comprises a mounting plate hoisted on the cover plate through a plurality of second connecting rods, a pseudo spark switch arranged on the mounting plate, a primary energy storage capacitor, a pulse transformer, a secondary energy storage capacitor and a steepening switch; the trigger pulse transmission assembly is used for transmitting a trigger electric pulse generated by the front-stage trigger to the main trigger; the main trigger is hoisted on the cover plate and is used for generating a high-amplitude trigger electric pulse and triggering the pulse power driving source to work.

Description

TECHNICAL FIELD

[0001] The present application particularly relates to a high-output-amplitude electric pulse trigger and an electric pulse generation method, which are applied to a large-scale pulse power driving source which needs to trigger a large-scale gas switch. BACKGROUND

[0002] The pulse power driving source is a device for generating a certain waveform pulse voltage or pulse current, and has wide applications in radiation environment simulation, high-power laser, controlled nuclear fusion, high-energy density physics and other fields. The pulse power driving source for the above-mentioned applications contains a large number of gas switches. When the pulse power driving source works, an electric pulse trigger needs to generate an electric pulse with a certain amplitude, pulse width and front edge to trigger the gas switches. With the continuous increase of the construction scale of the pulse power driving source, the number of gas switches contained therein is also increasing. In order to realize the stable, accurate and reliable triggering of the large-scale gas switches, a high-output-amplitude, fast-front-edge, low-jitter and high-stability electric pulse trigger needs to be developed.

[0003] At present, the high-output-amplitude electric pulse trigger usually adopts a voltage step-by-step amplification method to step up and amplify a low-amplitude control signal of several volts to hundreds of kilovolts. Based on different technical schemes, researchers at home and abroad have developed various electric pulse triggers. The book "Application of Pulse Power Technology" (edited by Qiu Aici, Shaanxi Science and Technology Press, 2016, pages 437-448) summarizes various commonly used technical schemes. Typical technical schemes include capacitor fast discharge type, Mini-Marx type, pulse transformer type and transmission line type. These different types of electric pulse triggers have their own advantages and disadvantages. For example, the capacitor fast discharge type has a simple structure, but needs a front-stage trigger, and is limited by the withstand voltage level of the capacitor and the switch, so that the output amplitude is difficult to exceed 200 kV; the Mini-Marx type has a high output amplitude, but contains a large number of switches, has high requirements for the performance of the switches, and needs a front-stage trigger; the pulse transformer type has high stability, does not need a front-stage trigger, and has a relatively high output amplitude, but needs to additionally increase a steepening switch, and the output pulse front edge and its stability of the trigger depend on the performance of the steepening switch; the transmission line type has a simple structure, and can conveniently perform multi-output, but is limited by the withstand voltage level of the cable, and has a low output amplitude.

[0004] As can be seen from the above, for the high-output-amplitude (several hundred kV) electric pulse trigger with fast front edge and high stability, the above-mentioned single type of trigger cannot achieve the same. SUMMARY

[0005] The application aims at solving the technical problem that the existing electric pulse trigger is difficult to meet the requirements of high output amplitude (hundreds of kV), fast front edge and high stability, and provides an electric pulse trigger with high output amplitude and an electric pulse generation method, so as to realize high-amplitude trigger electric pulse output.

[0006] The concept of the application is:

[0007] The application uses a trigger with low output amplitude as a front-stage trigger, and uses the trigger electric pulse generated by the front-stage trigger to trigger a trigger with high output amplitude, so as to obtain a high-amplitude trigger electric pulse. In the design process, on the one hand, in order to obtain a fast front edge and high stability, each key component of the electric pulse trigger needs to be reasonably selected and designed; on the other hand, in order to make the structure of the electric pulse trigger compact and convenient to assemble, the two triggers also need to be reasonably combined and assembled in space.

[0008] To solve the above technical problems and realize the above concept, the application adopts the technical scheme that:

[0009] An electric pulse trigger with high output amplitude, which is characterized in that: comprising a cover plate, a box body, a front-stage trigger, and a main trigger connected with the front-stage trigger through a trigger pulse transmission assembly.

[0010] The cover plate and the box body form a sealed cavity.

[0011] The front-stage trigger, the main trigger and the trigger pulse transmission assembly are all located in the sealed cavity.

[0012] The front-stage trigger comprises a mounting plate hoisted on the cover plate through a plurality of second connecting rods, a pseudo spark switch arranged on the mounting plate, a primary energy storage capacitor, a pulse transformer, a secondary energy storage capacitor and a steepening switch.

[0013] The ground electrode of the pseudo spark switch is fixedly arranged on the mounting plate, and the anode of the pseudo spark switch is connected with the lower end of the primary energy storage capacitor; the upper end of the primary energy storage capacitor is connected with the input end of the pulse transformer, the output end of the pulse transformer is connected with the upper end of the secondary energy storage capacitor, and the lower end of the secondary energy storage capacitor is grounded.

[0014] One end of the trigger pulse transmission assembly is connected with the steepening switch, and the other end is connected with the main trigger; the trigger pulse transmission assembly is used to transmit the trigger electric pulse generated by the front-stage trigger to the main trigger.

[0015] The main trigger is hoisted on the cover plate, and is used to generate a high-amplitude trigger electric pulse and trigger a pulse power driving source to work.

[0016] Further, the pulse transformer comprises a transformer body, an upper clamping plate and a lower clamping plate.

[0017] The lower clamping plate is arranged on the mounting plate through a lower support.

[0018] The transformer body is arranged on the lower clamping plate;

[0019] The upper clamping plate is mounted on the transformer body;

[0020] The upper end of the primary energy storage capacitor is connected with the input end of the transformer body, and the output end of the transformer body is connected with the upper end of the secondary energy storage capacitor.

[0021] Further, the steepener switch comprises a switch shell, an upper electrode and a lower electrode;

[0022] The upper electrode and the lower electrode are fixedly arranged on the upper end and the lower end of the side wall of the switch shell respectively;

[0023] The upper electrode comprises an electrode body and a ring electrode arranged on the electrode body and located in the switch shell;

[0024] The upper electrode structure is the same as the lower electrode structure, and the ring electrode of the upper electrode and the ring electrode of the lower electrode are coaxially arranged;

[0025] The upper end of the secondary energy storage capacitor is connected with the lower electrode;

[0026] One end of the trigger pulse transmission assembly is connected with the upper electrode.

[0027] Further, the trigger pulse transmission assembly comprises a trigger lead and a trigger distribution rod connected with one end of the trigger lead;

[0028] The other end of the trigger lead is connected with the upper electrode;

[0029] A plurality of connecting caps are arranged on the trigger distribution rod at equal intervals; the connecting caps are connected with the main trigger.

[0030] Further, the main trigger comprises a movement and a plurality of trigger resistors; the plurality of trigger resistors are equal in number to the plurality of connecting caps and one-to-one corresponding;

[0031] The movement is hoisted on the cover plate through an insulating rod;

[0032] One end of the trigger resistor is connected with the movement, and the other end of the trigger resistor is connected with the corresponding connecting cap.

[0033] Further, two resistance voltage dividers are further included;

[0034] The two resistance voltage dividers are connected with the upper electrode and the lower electrode, and are used for measuring the input voltage and the output voltage of the steepener switch.

[0035] Further, transformer oil is arranged in the sealed cavity;

[0036] The pseudo spark switch is a low-jitter electric trigger pseudo spark switch with jitter less than 1 ns.

[0037] The primary energy storage capacitor is a double-terminal lead-out plastic shell pulse capacitor;

[0038] The secondary energy storage capacitor is a double-terminal lead-out ceramic capacitor;

[0039] The steepening switch is filled with high-pressure dry air;

[0040] The circuit topology of the core is an S-shaped fast Marx generator;

[0041] The trigger resistor is a wire-wound resistor.

[0042] Further, the front-stage trigger and the main trigger are immersed in transformer oil;

[0043] The lower end of the secondary energy storage capacitor is fixedly arranged on the mounting plate through a first connecting rod;

[0044] The first connecting rod is a cylindrical stainless steel rod;

[0045] The material of the transformer body is amorphous;

[0046] The resistance divider is a divider composed of ceramic resistors;

[0047] The material of the mounting plate is stainless steel;

[0048] The material of the second connecting rod is stainless steel, and the number of the second connecting rod is four; one end of the four second connecting rods is fixedly connected with the mounting plate, and the other end is fixedly connected with the cover plate;

[0049] The upper clamping plate and the lower clamping plate are both circular ring structures with internal sawteeth;

[0050] The switch shell is a hollow cylindrical structure, and the material is PEEK;

[0051] The non-uniformity coefficient of the electric field between the upper electrode and the lower electrode is 2.0-2.5;

[0052] The electrode body is disc-shaped; the material of the upper electrode and the lower electrode is thorium-tungsten alloy;

[0053] The trigger resistors are three;

[0054] The trigger lead rod is a long strip-shaped metal rod;

[0055] The material of the trigger distribution rod is aluminum; and the connecting caps are three;

[0056] The material of the cover plate and the box body is carbon steel.

[0057] Meanwhile, the application also provides a high-output-amplitude electric pulse generation method based on the high-output-amplitude electric pulse trigger.

[0058] 1) demagnetizing the transformer body of the pulse transformer;

[0059] 2) charging the steepener switch and the main trigger to preset air pressure respectively;

[0060] 3) charging the primary energy storage capacitor and the main trigger to preset voltage respectively;

[0061] 4) after the primary energy storage capacitor and the main trigger are charged, turning on the pseudo spark switch, after the pseudo spark switch is turned on, the steepener switch and the main trigger will be sequentially broken down and turned on, completing discharge conduction and outputting a high-amplitude trigger electric pulse;

[0062] 5) within one second after the trigger is turned on, the steepener switch and the main trigger are discharged, at least three times of continuous charging and discharging are completed to complete one complete work of the electric pulse trigger.

[0063] Further, in step 2), the preset air pressure of the steepener switch is 3bar; the preset air pressure of the main trigger is 5bar;

[0064] In step 3), the preset voltage of the primary energy storage capacitor is 30kV; the preset voltage of the main trigger is ±65kV;

[0065] Step 4) is specifically:

[0066] Within 100-200 milliseconds after the primary energy storage capacitor and the main trigger are charged, a negative polarity trigger electric pulse is generated by an external control system and transmitted to the control signal input end of the pseudo spark switch to turn on the pseudo spark switch, after the pseudo spark switch is turned on, the steepener switch and the main trigger will be sequentially broken down and turned on, completing discharge conduction and outputting a high-amplitude trigger electric pulse.

[0067] Compared with the prior art, the beneficial effects of the technical scheme of the present application are:

[0068] 1) In the high-output-amplitude electric pulse trigger of the present application, the front-stage trigger and the main trigger are fixed and placed in the same box body, and are connected through a special trigger pulse transmission assembly, so that high-amplitude trigger electric pulse output can be realized, and the characteristics of fast front, low jitter, high reliability, compact structure, easy disassembly and assembly are also considered, and the use of transmission cable when the two are placed separately is avoided, and the reliability of the electric pulse trigger is improved.

[0069] 2、The high output amplitude electric pulse trigger of the application, the steep switch uses the ring electrode, the electrode structure can effectively reduce the steep switch jitter on the one hand, on the other hand, it is favorable to produce multi-channel discharge, reduce the inductance of steep switch and the ablation of upper electrode and lower electrode, the upper electrode and lower electrode material of steep switch all use thorium tungsten alloy, which is also conducive to reducing the ablation of upper electrode and lower electrode of steep switch, and improving the service life of steep switch.

[0070] 3、The high output amplitude electric pulse trigger of the application, the trigger resistance uses wire wound resistance, instead of the water resistance usually used, which can greatly improve the reliability of the electric pulse trigger, and avoid the pollution caused by water resistance rupture to transformer oil. BRIEF DESCRIPTION OF DRAWINGS

[0071] Figure 1 It is a three-dimensional structure schematic diagram of the embodiment of the high output amplitude electric pulse trigger of the application.

[0072] Figure 2 It is a three-dimensional structure schematic diagram of the front stage trigger in the embodiment of the high output amplitude electric pulse trigger of the application.

[0073] Figure 3 It is a three-dimensional structure schematic diagram of the pulse transformer in the embodiment of the high output amplitude electric pulse trigger of the application.

[0074] Figure 4 It is a structure schematic diagram of the steep switch in the embodiment of the high output amplitude electric pulse trigger of the application.

[0075] Figure 5 It is a three-dimensional structure schematic diagram of the trigger pulse transmission assembly in the embodiment of the high output amplitude electric pulse trigger of the application.

[0076] In the drawing, the reference signs are:

[0077] 1-front stage trigger, 2-main trigger, 3-trigger pulse transmission assembly;101-pseudo spark switch, 102-primary energy storage capacitor, 103-pulse transformer, 104-secondary energy storage capacitor, 105-first connecting rod, 106-steep switch, 108-resistance divider, 109-mounting plate, 110-second connecting rod;111-transformer body, 112-upper clamping plate, 113-lower clamping plate, 114-upper support column, 115-lower support column, 116-nut, 117-switch housing, 118-upper electrode, 119-lower electrode;201-core, 202-trigger resistance;301-triggering rod, 302-trigger distribution rod;401-cover plate, 402-box. DETAILED DESCRIPTION

[0078] As Figure 1As shown, a high-output amplitude electric pulse trigger includes a front-stage trigger 1, a main trigger 2, a trigger pulse transmission assembly 3, a cover plate 401, and a box 402; the cover plate 401 and the box 402 form a sealed cavity; the front-stage trigger 1, the main trigger 2, and the trigger pulse transmission assembly 3 are located in the sealed cavity.

[0079] First, the front-stage trigger 1 is used to generate a trigger electric pulse for triggering the main trigger 2; the front-stage trigger 1 includes a mounting plate 109 hoisted on the cover plate 401 by a plurality of second connecting rods 110, a pseudo spark switch 101 arranged on the mounting plate 109, a primary energy storage capacitor 102, a pulse transformer 103, a secondary energy storage capacitor 104, a steepening switch 106, and a resistance voltage divider 108;

[0080] The ground electrode of the pseudo spark switch 101 is fixedly arranged on the mounting plate 109, and the anode of the pseudo spark switch 101 is connected with the lower end of the primary energy storage capacitor 102; the upper end of the primary energy storage capacitor 102 is connected with the input end of the pulse transformer 103, and the output end of the pulse transformer 103 is connected with the upper end of the secondary energy storage capacitor 104; the lower end of the secondary energy storage capacitor 104 is grounded;

[0081] Second, the pulse transformer 103 includes a transformer body 111, an upper clamping plate 112, and a lower clamping plate 113; the lower clamping plate 113 is arranged on the mounting plate 109 by a lower support column 115; the transformer body 111 is arranged on the lower clamping plate 113; the upper clamping plate 112 is installed on the transformer body 111; the upper end of the primary energy storage capacitor 102 is connected with the input end of the transformer body 111, and the output end of the transformer body 111 is connected with the upper end of the secondary energy storage capacitor 104;

[0082] The steepening switch 106 includes a switch housing 117, an upper electrode 118, and a lower electrode 119; the upper electrode 118 and the lower electrode 119 are fixedly arranged on the upper end and the lower end of the side wall of the switch housing 117, respectively, and oppositely arranged; the upper electrode 118 includes an electrode body and a ring-shaped electrode arranged on the electrode body and located in the switch housing 117; the upper electrode 118 has the same structure as the lower electrode 119, and the ring-shaped electrode of the upper electrode 118 and the ring-shaped electrode of the lower electrode 119 are oppositely and coaxially arranged; the upper end of the secondary energy storage capacitor 104 is connected with the lower electrode 119; one end of the trigger pulse transmission assembly 3 is connected with the upper electrode 118.

[0083] The trigger pulse transmission assembly 3 is used to transmit the trigger electric pulse generated by the front-stage trigger 1 to the main trigger 2; the trigger pulse transmission assembly 3 includes a trigger lead 301 and a trigger distribution rod 302 connected with one end of the trigger lead 301; the other end of the trigger lead 301 is connected with the upper electrode 118 of the steepening switch 106; a plurality of connecting caps are arranged on the trigger distribution rod 302 at equal intervals; the connecting caps are connected with the main trigger 2.

[0084] The main trigger 2 comprises a core 201 and a plurality of trigger resistors 202; the plurality of trigger resistors 202 are equal in number to the plurality of connecting caps and one-to-one corresponding; the core 201 is hung on the cover plate 401 through an insulating rod; one end of the trigger resistor 202 is connected with the core 201, and the other end of the trigger resistor 202 is connected with the corresponding connecting cap; the main trigger 2 is hung on the cover plate 401, and is used for generating a high-amplitude trigger pulse and triggering the pulse power driving source to work.

[0085] The high-output-amplitude electric pulse trigger provided by the application can realize high-amplitude trigger pulse output, and has the characteristics of fast front, low jitter, high reliability, compact structure, convenient disassembly and assembly, etc.

[0086] In the embodiment, the box body 402 is used for fixing and containing the pre-stage trigger 1, the main trigger 2 and the trigger pulse transmission assembly 3. The cover plate 401 is provided with a plurality of through holes, and the pre-stage trigger 1 and the main trigger 2 are fixed and hung on the cover plate 401 through screws. The cover plate 401 and the box body 402 are connected through screws and constitute a sealed structure. The box body 402 is a long rectangular box without a cover, and is provided with a flange at the upper end for connecting with the cover plate 401. The box body 402 is filled with transformer oil for insulation. The pre-stage trigger 1 and the main trigger 2 are both immersed in the transformer oil.

[0087] As shown in Figure 2 , the pre-stage trigger 1 is composed of a pseudo spark switch 101, a primary energy storage capacitor 102, a pulse transformer 103, a secondary energy storage capacitor 104, a first connecting rod 105, a steepening switch 106, two resistance voltage dividers 108, a mounting plate 109 and four second connecting rods 110. The ground electrode of the pseudo spark switch 101 is fixed on the mounting plate 109 through a metal screw, and the anode of the pseudo spark switch 101 is connected with the lower end of the primary energy storage capacitor 102 through a metal screw rod. The pulse transformer 103 is fixed on the mounting plate 109 through a non-metal screw. The lower end of the secondary energy storage capacitor 104 is fixed on the mounting plate 109 through the first connecting rod 105, and the upper end of the secondary energy storage capacitor 104 is connected with the lower electrode 119 in the steepening switch 106 through a metal screw rod. The distance between the central axes of the pseudo spark switch 101, the pulse transformer 103 and the steepening switch 106 is 22 cm. The two resistance voltage dividers 108 are fixed on the mounting plate 109 through metal screws.

[0088] As shown in Figure 3As shown, the pulse transformer 103 is composed of a transformer body 111, an upper clamp plate 112, a lower clamp plate 113, upper support columns 114, lower support columns 115 and nuts 116. The lower clamp plate 113 is fixed on the mounting plate 109 by six lower support columns 115, the transformer body 111 is installed on the lower clamp plate 113, the upper clamp plate 112 is installed on the transformer body 111, and the upper clamp plate 112 and the lower clamp plate 113 fix the transformer body 111 in the middle of the upper clamp plate 112 and the lower clamp plate 113 by six upper support columns 114 and six nuts 116. The upper clamp plate 112 and the lower clamp plate 113 are the same structure, both of which are circular rings with sawteeth on the inner wall. Figure 4 As shown, the steepening switch 106 is composed of a cylindrical switch shell 117, an upper electrode 118 and a lower electrode 119. The upper electrode 118 and the lower electrode 119 are fixed on the switch shell 117 by metal screws and form a sealed body with the switch shell 117. The upper electrode 118 and the lower electrode 119 are the same structure, both of which are composed of an electrode body and a ring-shaped electrode. The electrode body is a disc, and six circular through holes with a diameter of 7 mm are arranged on the circumference of the disc. The ring-shaped electrode is a cylindrical circular ring, and the upper end of the ring-shaped electrode is rounded. The switch shell 117 is a cylindrical hollow shell, and six M6 threaded holes are arranged on the side wall of the switch shell 117 at opposite positions, which are used to install the upper electrode 118 and the lower electrode 119. An M10 threaded hole is arranged in the middle of the switch shell 117, which is used to install a standard air nozzle product. Two resistance voltage dividers 108 are also arranged, and the input ends of the two resistance voltage dividers 108 are electrically connected to the upper electrode 118 and the lower electrode 119 of the steepening switch 106 respectively. The two resistance voltage dividers 108 are used to measure the input voltage and the output voltage of the steepening switch 106 respectively.

[0089] As shown, Figure 5 The trigger pulse transmission assembly 3 is composed of a trigger lead 301 and a trigger distribution rod 302. The trigger lead 301 is a long strip-shaped metal rod, and a circular through hole with a diameter of 9 mm is arranged at each end of the metal rod. One end of the trigger lead 301 is connected to the trigger distribution rod 302 by a screw. The trigger distribution rod 302 is a long strip-shaped metal rod with three metal connecting caps welded on the surface. The metal connecting caps are welded on the long strip-shaped metal rod at equal intervals, and three M5 threaded holes are arranged around each metal cap.

[0090] The trigger pulse transmission assembly 3 transmits the trigger electric pulse generated by the front-stage trigger 1 to the three trigger resistors 202 of the main trigger 2. Therefore, one end of the trigger lead 301 is connected to the upper electrode 118 of the steepening switch 106 by a screw, and the three metal caps of the trigger distribution rod 302 are connected to the top ends of the three trigger resistors 202 of the main trigger 2 by screws respectively.

[0091] In the pre-stage trigger 1, the pseudo-spark switch 101 is a low-jitter electrically triggered pseudo-spark switch with a DC withstand voltage of 40kV, a jitter of 0.9ns, a height of 120mm, and a diameter of 110mm. The primary energy storage capacitor 102 is a double-ended plastic-cased pulse capacitor with a withstand voltage of 40kV and a capacitance of 40nF. The upper clamping plate 112 and the lower clamping plate 113 have inner and outer diameters of 280mm and 400mm respectively, a thickness of 28mm, 32 serrations, and are made of nylon. The transformer body 111 uses a mature transformer product with a turns ratio of 1:6, an inner diameter of 100mm, an outer diameter of 320mm, a height of 160mm, and is made of amorphous material. The secondary energy storage capacitor 104 is a double-ended ceramic capacitor with a withstand voltage of 200kV and a capacitance of 1nF. The first connecting rod 105 is a cylindrical stainless steel rod with M5 threaded holes at both ends, with a diameter of 30mm and a height of 80mm. The steepening switch 106 has a diameter of 80mm and a height of 50mm; the annular electrode of the upper electrode 118 has a height of 10mm, an inner diameter of 12mm and an outer diameter of 14mm, and a rounded corner R0.5mm at the end of the annular electrode. The electric field non-uniformity coefficient of the gap formed by the upper electrode 118 and the lower electrode 119 is 2.2.

[0092] The steepening switch 106 is filled with high-pressure dry air at 3 bar, which allows it to break down at 88% of the pulse voltage leading edge. The resistive voltage divider 108 is a ceramic resistor with a voltage division ratio of 10000:1, a diameter of 30 mm, and a length of 190 mm. The mounting plate 109 is 650 mm long, 450 mm wide, and 5 mm thick, with 35 mm right-angle bends at both ends. The mounting plate 109 is made of stainless steel. The four second connecting rods 110 are 530 mm high, 60 mm wide, and 30 mm thick, and are also made of stainless steel.

[0093] In the main trigger 2, the mechanism 201 is a three-stage S-shaped fast Marx generator with positive and negative charging. There are three trigger resistors 202, all of which are wire-wound resistors. Each trigger resistor 202 has a resistance of 1000 ohms, a length of 240mm, and a diameter of 40mm. The main trigger 2 is suspended and fixed to the cover plate 401 by six cylindrical nylon connecting rods.

[0094] In the trigger pulse transmission assembly 3, the trigger rod 301 is 530mm long, 28mm wide, and 3mm thick, and is made of aluminum. Both ends of the trigger rod 301 have R14mm rounded corners. The trigger distribution rod 302 is 490mm long, made of aluminum, and has three metal connectors welded to its surface with a spacing of 180mm. The height of each metal connector is 45mm, its outer diameter is 45mm, and its inner diameter is 40mm.

[0095] In the box 4, the cover plate 401 is 1500mm in length, 1000mm in width and 6mm in thickness. The box 402 is 1450mm in length, 950mm in width, 1100mm in height and 5mm in wall thickness. The flange welded on the upper end of the box 402 is 1500mm in length, 1000mm in width and 10mm in thickness. The cover plate 401 and the box 402 are both made of carbon steel.

[0096] The working principle of the above embodiment is as follows:

[0097] The external high-voltage DC power supplies the primary energy storage capacitor 102 and the main trigger 2 with a certain amplitude of DC voltage. When the external trigger pulse is input to the control signal input end of the pseudo spark switch 101, the pseudo spark switch 101 is turned on, and a primary voltage pulse is generated at the input end of the pulse transformer 103. The primary voltage pulse is boosted according to the transformation ratio of the pulse transformer 103, and is output through the output end of the pulse transformer 103 to charge the secondary energy storage capacitor 104. When the voltage on the secondary energy storage capacitor 104 reaches the breakdown voltage of the steepener switch 106, the steepener switch 106 breaks down and generates a primary trigger pulse. After the primary trigger pulse is input to the trigger resistor 202 of the main trigger 2 through the trigger pulse transmission assembly 3, the main trigger 2 completes discharge conduction and outputs a high-amplitude trigger pulse.

[0098] The high-output-amplitude electric pulse generation method of the present application comprises the following steps:

[0099] 1) The demagnetizing power supply is started by the external control system, and then generates a current with an amplitude of 5A and delivers it to the demagnetizing end of the transformer body 111. The demagnetizing power supply is turned off 5 seconds after being started, thereby completing the demagnetization of the transformer body of the pulse transformer 103;

[0100] 2) The external control system controls the external gas source to charge the steepener switch 106 and the multi-gap gas switch in the main trigger 2 with a certain gas pressure;

[0101] 3) The external high-voltage DC power supplies the primary energy storage capacitor 102 and the main trigger 2 with a certain amplitude of DC voltage by using the control system;

[0102] 4) After the primary energy storage capacitor 102 and the main trigger 2 are charged, the high-voltage DC power is turned off. Within 200 milliseconds after the high-voltage DC power is turned off, the external control system generates a -2.5kV trigger pulse and transmits it to the control signal input end of the pseudo spark switch 101 through a cable, thereby controlling the pseudo spark switch 101 to be turned on. After the pseudo spark switch 101 is turned on, the steepener switch 106 and the main trigger 2 will be broken down and turned on in turn, so that the high-output-amplitude electric pulse trigger of the present application completes discharge conduction and outputs a high-amplitude trigger pulse;

[0103] 5) After the high output amplitude electric pulse trigger is turned on, the external control system controls the external air source to charge and discharge the multi-gap gas switch in the steep switch 106 and the main trigger 2 three times in succession after the gas is discharged. At this point, the electric pulse trigger completes a complete work.

[0104] In this embodiment, through performance test experiments, it is obtained that when the primary energy storage capacitor 102 is charged to 30 kV, the main trigger 2 is charged to ±65 kV, the steep switch 106 is charged with 3 bar air, and the multi-gap gas switch in the main trigger 2 is charged to 5 bar, the steep switch 106 can break down at 88% of the front edge of the pulse voltage and generate a trigger electric pulse with an amplitude of 180 kV. Under the action of the trigger electric pulse, the main trigger 2 load (the load is 12.5 ohms) can output a high amplitude trigger electric pulse of 320 kV, the jitter of the main trigger 2 is less than 2 ns, and more than 3000 experiments do not appear any failure and performance degradation trend.

Claims

1. A high-output-amplitude electrical pulse trigger, characterized in that: Includes a cover plate (401), a housing (402), a pre-stage trigger (1), and a main trigger (2) connected to the pre-stage trigger (1) via a trigger pulse transmission assembly (3); The cover plate (401) and the box body (402) form a sealed cavity; The pre-stage trigger (1), the main trigger (2), and the trigger pulse transmission component (3) are all located in the sealed cavity; The pre-stage trigger (1) includes a mounting plate (109) suspended on a cover plate (401) by multiple second connecting rods (110), a pseudo-spark switch (101) set on the mounting plate (109), a primary energy storage capacitor (102), a pulse transformer (103), a secondary energy storage capacitor (104), and a steepening switch (106); The ground electrode of the pseudo-spark switch (101) is fixedly mounted on the mounting plate (109). The anode of the pseudo-spark switch (101) is connected to the lower end of the primary energy storage capacitor (102). The upper end of the primary energy storage capacitor (102) is connected to the input end of the pulse transformer (103). The output end of the pulse transformer (103) is connected to the upper end of the secondary energy storage capacitor (104). The lower end of the secondary energy storage capacitor (104) is grounded. One end of the trigger pulse transmission component (3) is connected to the steepening switch (106), and the other end is connected to the main trigger (2); the trigger pulse transmission component (3) is used to transmit the trigger electrical pulse generated by the previous stage trigger (1) to the main trigger (2); The main trigger (2) is suspended on the cover plate (401) to generate high-amplitude trigger electrical pulses and trigger the pulse power drive source to work.

2. The high-output-amplitude electrical pulse trigger according to claim 1, characterized in that: The pulse transformer (103) includes a transformer body (111), an upper clamping plate (112), and a lower clamping plate (113); The lower clamping plate (113) is mounted on the mounting plate (109) via the lower support column (115); The transformer body (111) is mounted on the lower clamping plate (113); The upper clamping plate (112) is installed on the transformer body (111); The upper end of the primary energy storage capacitor (102) is connected to the input end of the transformer body (111), and the output end of the transformer body (111) is connected to the upper end of the secondary energy storage capacitor (104).

3. The high-output-amplitude electrical pulse trigger according to claim 2, characterized in that: The steepening switch (106) includes a switch housing (117), an upper electrode (118), and a lower electrode (119); The upper electrode (118) and lower electrode (119) are respectively fixedly disposed on the upper and lower ends of the side wall of the switch housing (117); The upper electrode (118) includes an electrode body and an annular electrode disposed on the electrode body and located inside the switch housing (117); The structure of the upper electrode (118) is the same as that of the lower electrode (119), and the annular electrode of the upper electrode (118) and the annular electrode of the lower electrode (119) are coaxially arranged relative to each other. The upper end of the secondary energy storage capacitor (104) is connected to the lower electrode (119); One end of the trigger pulse transmission component (3) is connected to the upper electrode (118).

4. A high-output-amplitude electrical pulse trigger according to claim 3, characterized in that: The trigger pulse transmission component (3) includes a trigger rod (301) and a trigger distribution rod (302) connected to one end of the trigger rod (301); The other end of the trigger rod (301) is connected to the upper electrode (118); Multiple connecting caps are evenly spaced on the trigger distribution rod (302); the connecting caps are connected to the main trigger (2).

5. A high-output-amplitude electrical pulse trigger according to claim 4, characterized in that: The main trigger (2) includes a mechanism (201) and multiple trigger resistors (202); the multiple trigger resistors (202) and multiple connection caps are equal in number and correspond one-to-one; The movement (201) is suspended on the cover plate (401) by an insulating rod; One end of the trigger resistor (202) is connected to the movement (201), and the other end of the trigger resistor (202) is connected to the corresponding connector cap.

6. A high-output-amplitude electrical pulse trigger according to claim 5, characterized in that: It also includes two resistor dividers (108); The two resistor dividers (108) are connected to the upper electrode (118) and the lower electrode (119) to measure the input voltage and output voltage of the steepening switch (106).

7. A high-output-amplitude electrical pulse trigger according to claim 6, characterized in that: The sealed cavity is filled with transformer oil; The pseudo-spark switch (101) is a low-jitter electrically triggered pseudo-spark switch with a jitter of less than 1ns. The primary energy storage capacitor (102) is a double-ended plastic-cased pulse capacitor; The secondary energy storage capacitor (104) is a ceramic capacitor with two leads at both ends; The steepening switch (106) is filled with high-pressure dry air; The circuit topology of the mechanism (201) is an S-shaped fast Marx generator; The trigger resistor (202) is a wire-wound resistor.

8. A high-output-amplitude electrical pulse trigger according to claim 7, characterized in that: Both the pre-stage trigger (1) and the main trigger (2) are immersed in transformer oil; The lower end of the secondary energy storage capacitor (104) is fixedly mounted on the mounting plate (109) by the first connecting rod (105); The first connecting rod (105) is a cylindrical stainless steel rod; The material of the transformer body (111) is amorphous; The voltage divider (108) is a voltage divider composed of ceramic resistors; The mounting plate (109) is made of stainless steel; The second connecting rod (110) is made of stainless steel and there are four of them. One end of each of the four second connecting rods (110) is fixed to the mounting plate (109) and the other end is fixed to the cover plate (401). The upper clamping plate (112) and the lower clamping plate (113) are both circular ring structures with serrations inside; The switch housing (117) is a hollow cylindrical structure made of PEEK. The electric field non-uniformity coefficient of the gap between the upper electrode (118) and the lower electrode (119) is 2.0~2.5; The electrode body is disc-shaped; the upper electrode (118) and the lower electrode (119) are made of thorium-tungsten alloy; There are three trigger resistors (202); The trigger rod (301) is a long strip-shaped metal rod; The trigger distribution rod (302) is made of aluminum; there are three connecting caps; Both the cover plate (401) and the box body (402) are made of carbon steel.

9. A method for generating high-output-amplitude electrical pulses, based on a high-output-amplitude electrical pulse trigger as described in any one of claims 1-8, characterized in that, Includes the following steps: 1) Demagnetize the transformer body of the pulse transformer (103); 2) Inflate the steepening switch (106) and the main trigger (2) to the preset air pressure respectively; 3) Charge the primary energy storage capacitor (102) and the main trigger (2) to the preset voltage respectively; 4) After the primary energy storage capacitor (102) and the main trigger (2) are charged, the pseudo-spark switch (101) is turned on. After the pseudo-spark switch (101) is turned on, the steepening switch (106) and the main trigger (2) will break down and be turned on in sequence, completing the discharge and outputting a high-amplitude trigger pulse. 5) Within one second after the trigger is turned on, the steepening switch (106) and the main trigger (2) are vented. After at least three consecutive inflation and deflation cycles, the electrical pulse trigger completes one full operation.

10. A method for generating high-output-amplitude electrical pulses according to claim 9, characterized in that: In step 2), the preset air pressure of the steepening switch (106) is 3 bar; the preset air pressure of the main trigger (2) is 5 bar. In step 3), the preset voltage of the primary energy storage capacitor (102) is 30kV; the preset voltage of the main trigger (2) is ±65kV. Step 4) specifically involves: Within 100-200 milliseconds after the primary energy storage capacitor (102) and the main trigger (2) are fully charged, a negative polarity trigger pulse is generated by the external control system and transmitted to the control signal input terminal of the pseudo-spark switch (101) to turn on the pseudo-spark switch (101). After the pseudo-spark switch (101) is turned on, the steepening switch (106) and the main trigger (2) will break down and turn on in sequence, completing the discharge and outputting a high amplitude trigger pulse.

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