High-voltage pulse source based on solid-state switch and electric and optical trigger system and trigger method thereof

Abstract

The invention relates to a high-voltage pulse source in a pulse power device, in particular to a high-voltage pulse source based on a solid-state switch and an electric and optical trigger system and a trigger method thereof, and solves the technical problem that the existing high-voltage pulse source based on a gas switch is difficult to meet the design requirements of low jitter, high synchronism, miniaturization and integration at the same time. The high-voltage pulse source based on the solid-state switches comprises n series-connected charging resistors R1, n series-connected grounding resistors R2, a load resistor R3 and n stages of series-connected charging units, when n capacitors C are charged to a preset voltage U0, all external trigger solid-state switches are switched on after receiving an external trigger signal, and when n capacitors C are charged to a preset voltage U0, all external trigger solid-state switches are switched on, if the change rate of the potential difference between the electrodes of the self-breakdown solid-state switches reaches the conduction threshold dU / dt, the self-breakdown solid-state switches are automatically conducted, and after all the self-breakdown solid-state switches are conducted, the Marx generator is established and outputs hundred-kV-magnitude pulses.

Description

Technical Field

[0001] The present invention relates to a high-voltage pulse source in a pulse power device, and more particularly to a high-voltage pulse source based on a solid-state switch and its electrical and optical trigger systems and triggering methods, which can be used in the trigger system of a large pulse power device. Background Art

[0002] With the development of large pulse power devices, there are increasing demands for miniaturization, integrability, low jitter, and high stability in high-voltage pulse sources such as primary sources and triggers. High-voltage pulse sources based on gas switches have problems such as large jitter, high triggering conditions, large system structure volume, and difficulty in integration. Especially for the triggers of future large pulse power devices, it is difficult to simultaneously meet the design requirements of low jitter, high synchronization, miniaturization, and integrability.

[0003] Existing solid-state switches have advantages such as small volume, low jitter, and strong stability. High-voltage pulse sources based on solid-state switches have considerable advantages in terms of miniaturization, high synchronization, and low jitter, and have broad development prospects for the construction of future large pulse power devices. However, there is no report on its application in large pulse power devices. Summary of the Invention

[0004] The object of the present invention is to solve the technical problem that existing high-voltage pulse sources based on gas switches are difficult to simultaneously meet the design requirements of low jitter, high synchronization, miniaturization, and integrability, and provide a high-voltage pulse source based on a solid-state switch and its electrical and optical trigger systems and triggering methods.

[0005] To achieve the above object, the present invention adopts the following technical solutions:

[0006] A high-voltage pulse source based on a solid-state switch, characterized in that it includes n series-connected charging resistors R1, n series-connected grounding resistors R2, a load resistor R3, and n series-connected charging units, where n is an integer greater than or equal to 3;

[0007] The charging unit includes a solid-state switch S and a capacitor C with one end connected to the solid-state switch S;

[0008] One end of the first grounding resistor R2 is grounded, and the other ends of the first to the n-1th grounding resistors R2 are all connected between the capacitor C of the corresponding charging unit and the solid-state switch S of the next-level charging unit. The other end of the nth grounding resistor R2 is connected to the other end of the capacitor C of the nth charging unit;

[0009] One end of the load resistor R3 is grounded, and the other end is connected to the other end of the capacitor C of the nth charging unit;

[0010] One end of the first charging resistor R1 is connected to the output terminal of an external high-voltage power supply, and the other ends of the first to nth charging resistors R1 are all connected between the solid-state switch S and the capacitor C of the corresponding charging unit; the charging unit connected to the other end of the first charging resistor R1 is used as the first-stage charging unit; the solid-state switches S in the first m-stage charging units are externally triggered solid-state switches, and the solid-state switches S in the subsequent n - m-stage charging units are self-breakdown solid-state switches. The externally triggered solid-state switches are used to connect to an external triggering device; the other end of the capacitor C in the nth charging unit is used to connect to an external load, where m≥1;

[0011] When the n capacitors C are charged to a preset voltage U0, all the externally triggered solid-state switches receive an external trigger signal and turn on, then the rate of change of the potential difference across the electrodes of the self-breakdown solid-state switches reaches its conduction threshold dU / dt, and each self-breakdown solid-state switch turns on by itself. After all the self-breakdown solid-state switches turn on, a Marx generator is established and outputs pulses in the order of hundreds of kV.

[0012] Furthermore, the conduction threshold dU / dt of the self-breakdown solid-state switch is on the order of 100 kV / μs.

[0013] The present invention also provides an electrical triggering system for the above-mentioned high-voltage pulse source based on solid-state switches, which is characterized in that it includes N magnetic rings and a drive circuit board with the same number as the externally triggered solid-state switches, where N≥1;

[0014] The drive circuit board forms a first loop by leading wires passing through one magnetic ring, and the trigger electrodes of all the externally triggered solid-state switches of the high-voltage pulse source respectively form a second loop by leading wires passing through the same magnetic ring; or, the drive circuit board forms a first loop by leading wires passing through N magnetic rings in sequence, and the trigger electrodes of all the externally triggered solid-state switches of the high-voltage pulse source form a second loop by leading wires passing through N magnetic rings respectively;

[0015] The power supply terminal of the drive circuit board is used to connect to the positive pole of an external low-voltage power supply, and its voltage is less than or equal to 100 V;

[0016] When the n capacitors C of the high-voltage pulse source are charged to the preset voltage U0, the drive circuit board receives an external trigger signal and the first loop turns on. At the same time, an induced current is generated in the magnetic ring and the second loop turns on, then the corresponding externally triggered solid-state switch turns on. When the rate of change of the potential difference across the electrodes of all the self-breakdown solid-state switches reaches its conduction threshold dU / dt, each self-breakdown solid-state switch turns on by itself. After all the self-breakdown solid-state switches turn on, a Marx generator is established and outputs pulses in the order of hundreds of kV.

[0017] Furthermore, N = 3.

[0018] At the same time, the present invention provides another electrical triggering method of a high voltage pulse source based on a solid-state switch. The electrical triggering system based on the high voltage pulse source based on a solid-state switch is special in that it includes the following steps:

[0019] S1, charging n capacitors C of the high voltage pulse source through each charging resistor R1;

[0020] S2. When the n capacitors C are charged to the preset voltage U0, the driving circuit board receives an electric pulse signal, which generates an induced current in the magnetic ring, so that all externally triggered solid-state switches of the high-voltage pulse source are turned on and a potential difference is generated between the electrodes of the self-breakdown solid-state switches;

[0021] S3. When the rate of change of the potential difference reaches the conduction threshold dU / dt of the self-breakdown solid-state switch, each self-breakdown solid-state switch turns on by itself. After all the self-breakdown solid-state switches are turned on, the Marx generator is established and the triggering of the high voltage pulse source is completed.

[0022] In addition, a light triggering system of a high voltage pulse source based on a solid-state switch is special in that: N packaging shells, N ≥ 1;

[0023] Each package shell is provided with a magnetic ring, a driving circuit board, a photoelectric converter and a voltage divider circuit;

[0024] All externally triggered solid-state switches in the high-voltage pulse source are respectively packaged in N packaging shells;

[0025] The driving circuit board passes through a magnetic ring through lead wires to form a first loop, and the trigger electrodes of all externally triggered solid-state switches of the high-voltage pulse source pass through the same magnetic ring through lead wires to form a second loop;

[0026] One end of the voltage divider circuit is connected to the power supply end of the driving circuit board, and the other end is connected to the positive electrode of the external high-voltage power supply;

[0027] The receiving end of the photoelectric converter is used to receive external optical signals, and the output end is connected to the trigger end of the driving circuit board, which is used to convert the optical signal into an electrical pulse signal and then transmit it to the driving circuit board; when the driving circuit board receives the electrical pulse signal, the first circuit is turned on, and at the same time, the induced current is generated in the magnetic ring and the second circuit is turned on, thereby triggering the high-voltage pulse source to output pulses of the order of hundreds of kV.

[0028] Furthermore, the voltage divider circuit includes a voltage-regulating diode and a voltage-regulating resistor; the positive electrode of the voltage-regulating diode is connected to the power supply end of the driving circuit board, and the negative electrode is connected to one end of the voltage-regulating resistor; the other end of the voltage-regulating resistor is connected to the positive electrode of the external high-voltage power supply.

[0029] Furthermore, said N=1.

[0030] The present invention also provides a triggering method for a high-voltage pulse source based on a solid-state switch. Based on the optical triggering system of the high-voltage pulse source based on the solid-state switch described above, the special features are as follows: It includes the following steps:

[0031] S1. Charge the n capacitors C of the high-voltage pulse source through the respective charging resistors R1;

[0032] S2. When the n capacitors C are charged to the preset voltage U0, the optoelectronic converter receives an external optical signal and converts it into an electrical pulse signal, which is sent to the drive circuit board;

[0033] S3. The electrical pulse signal received by the drive circuit board generates an induced current in the magnetic ring, causing all the external trigger solid-state switches of the high-voltage pulse source to conduct, and generating a potential difference between the electrodes of the self-breakdown solid-state switch;

[0034] S4. When the rate of change of the potential difference reaches its conduction threshold dU / dt, each self-breakdown solid-state switch conducts on its own. After all the self-breakdown solid-state switches are conducted, the Marx generator is established, completing the triggering of the high-voltage pulse source.

[0035] Advantages of the present invention:

[0036] 1. For the high-voltage pulse source based on the solid-state switch of the present invention, by combining the external trigger solid-state switch and the self-breakdown solid-state switch, the drive unit is simplified, the stability of the high-voltage pulse source (i.e., Marx) is improved, and at the same time, problems such as self-discharge and switch breakdown caused by asynchronous switch triggering are avoided.

[0037] 2. For the electrical triggering system of the high-voltage pulse source based on the solid-state switch of the present invention, the composition of the Marx system can be simplified, the anti-space electromagnetic interference ability of the system is enhanced, the electrical triggering system is simplified, providing favorable conditions for the miniaturization and synchronizability of the system.

[0038] 3. In the electrical triggering method of the high-voltage pulse source based on the solid-state switch of the present invention, each external trigger solid-state switch is respectively connected to a magnetic ring. The trigger electrode lead of the external trigger solid-state switch passes through the magnetic ring as a secondary side, and the lead drawn from the drive circuit board passes through N magnetic rings as a primary side, forming a 1:1 transformer for isolating and protecting the drive circuit board.

[0039] 4. In the electrical triggering method of the high-voltage pulse source based on the solid-state switch of the present invention, each external trigger solid-state switch respectively leads out a wire, and each wire is aggregated onto a magnetic ring to form M secondary sides. The lead drawn from the drive circuit board passes through the magnetic ring as a primary side, forming a 1:M transformer for isolating and protecting the drive circuit board.

[0040] 5】 The optical trigger system of a high-voltage pulse source based on a solid-state switch according to the present invention simplifies the trigger unit of the existing Marx system, has strong operability and high integration; it can be used as the trigger system of a large pulsed power device through the method of pulse signal separated trigger, meeting the requirement of adjustable timing of the primary source core unit.

[0041] 6】 The optical trigger method of a high-voltage pulse source based on a solid-state switch according to the present invention can avoid the high-voltage pulse of the main circuit being induced onto the drive circuit board, thereby causing permanent damage to the drive circuit board, and effectively protects the drive circuit board. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] Figure 1 is a schematic structural diagram of an embodiment of a high-voltage pulse source based on a solid-state switch according to the present invention;

[0043] Figure 2 is a schematic diagram of a first connection mode between an external trigger solid-state switch and a drive circuit board in an embodiment of the electric trigger system of a high-voltage pulse source based on a solid-state switch according to the present invention;

[0044] Figure 3 is a schematic diagram of a second connection mode between an external trigger solid-state switch and a drive circuit board in an embodiment of the electric trigger system of a high-voltage pulse source based on a solid-state switch according to the present invention;

[0045] Figure 4 is a schematic structural diagram of an embodiment of the optical trigger system of a high-voltage pulse source based on a solid-state switch according to the present invention.

[0046] DESCRIPTION OF THE REFERENCE NUMERALS:

[0047] 7 - External trigger solid-state switch, 8 - Magnetic ring, 9 - Drive circuit board, 10 - Photoelectric converter, 11 - Zener diode, 12 - Voltage-dividing resistor, 13 - Encapsulation housing. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0048] As Figure 1 shown, a high-voltage pulse source based on a solid-state switch includes n series-connected charging resistors R1, n series-connected grounding resistors R2, 1 load resistor R3, and n series-connected charging units, where n is an integer greater than or equal to 3; the charging unit includes a solid-state switch S and a capacitor C with one end connected to the solid-state switch S.

[0049] One end of the first grounding resistor R2 is grounded, the other ends of the first to the n - 1th grounding resistors R2 are all connected between the capacitor C of the corresponding charging unit and the solid-state switch S of the next-level charging unit, and the other end of the nth grounding resistor R2 is connected to the other end of the capacitor C of the nth charging unit; one end of the load resistor R3 is grounded, and the other end is connected to the other end of the capacitor C of the nth charging unit.

[0050] One end of the first charging resistor R1 is connected to the output terminal of an external high-voltage power supply, and the other ends of the first to the nth charging resistors R1 are all connected between the solid-state switch S and the capacitor C of the corresponding charging unit; the charging unit connected to the other end of the first charging resistor R1 is used as the first-stage charging unit; the solid-state switch S in the first m-stage charging units is an externally triggered solid-state switch 7, and the solid-state switch S in the subsequent n - m-stage charging units is a self-breakdown solid-state switch (the externally triggered solid-state switch 7 is before the self-breakdown solid-state switch, and the two do not appear alternately, that is, the first m stages are externally triggered solid-state switches, and the subsequent n - m stages are self-breakdown solid-state switches), and the externally triggered solid-state switch 7 is used to connect to an external triggering device; the other end of the capacitor C in the nth charging unit is used to connect to an external load, and m≥1.

[0051] When the n capacitors C are charged to a preset voltage U0, all the externally triggered solid-state switches 7 receive an external trigger signal and turn on, then the rate of change of the potential difference applied between the electrodes of the self-breakdown solid-state switch reaches its conduction threshold dU / dt, and each self-breakdown solid-state switch turns on by itself. After all the self-breakdown solid-state switches are turned on, a Marx generator is established and outputs pulses in the order of hundreds of kV. Preferably, the conduction threshold dU / dt of the self-breakdown solid-state switch is on the order of 100 kV / μs.

[0052] The present invention provides an electrical trigger system for the above-mentioned high-voltage pulse source based on solid-state switches, which includes three magnetic rings 8 and a drive circuit board 9; the power supply terminal of the drive circuit board 9 is used to connect to the positive pole of an external low-voltage power supply, and its voltage is less than or equal to 100V.

[0053] As Figure 2 shown, the drive circuit board 9 passes through the three magnetic rings 8 in sequence through lead wires to form a first loop, and the trigger electrodes of the three externally triggered solid-state switches 7 of the high-voltage pulse source pass through the three magnetic rings 8 respectively through lead wires to form a second loop; each externally triggered solid-state switch 7 leads out a wire and connects to a magnetic ring 8 as a secondary side, and the wire led out by the drive circuit board 9 passes through the three magnetic rings 8 as a primary side; the pulse signal given by the drive circuit board 9 is induced on each magnetic ring 8, and the magnetic ring 8 generates an induced current, so that all the externally triggered solid-state switches 7 are turned on, that is, the three magnetic rings 8 work, and each magnetic ring 8 is equivalent to a 1:1 transformer for isolating and protecting the drive circuit board 9.

[0054] As Figure 3As shown, the drive circuit board 9 forms a first loop by leading out wires through a magnetic ring 8. The trigger electrodes of the 3 external trigger solid-state switches 7 of the high-voltage pulse source respectively form a second loop by leading out wires through the same magnetic ring 8. Each external trigger solid-state switch 7 leads out a wire, and each wire converges on a magnetic ring 8 as 3 secondary sides, and the wire led out by the drive circuit board 9 passes through the magnetic ring 8 as the primary side. The pulse signal given by the drive circuit board 9 is induced on the magnetic ring 8, and the magnetic ring 8 generates an induced current, and the induced current makes all the external trigger solid-state switches 7 conduct, that is, 1 magnetic ring 8 works, and the magnetic ring 8 is equivalent to a 1:3 transformer for isolating and protecting the drive circuit board 9.

[0055] When n capacitors C of the high-voltage pulse source are charged to the preset voltage U0, the drive circuit board 9 receives an external trigger signal and the first loop conducts. At the same time, an induced current is generated in the magnetic ring 8 and the second loop conducts. Then, when the rate of change of the potential difference applied between the electrodes of all the self-breakdown solid-state switches reaches its conduction threshold dU / dt, each self-breakdown solid-state switch conducts on its own. After all the self-breakdown solid-state switches conduct, the Marx generator is established and outputs pulses in the order of hundreds of kV.

[0056] Meanwhile, the present invention also provides an electrical triggering method for a high-voltage pulse source based on solid-state switches. Based on the above electrical triggering system for a high-voltage pulse source based on solid-state switches, it includes the following steps:

[0057] S1. Charge n capacitors C of the high-voltage pulse source through respective charging resistors R1;

[0058] S2. When the n capacitors C are charged to the preset voltage U0, the drive circuit board 9 receives an electrical pulse signal. The electrical pulse signal generates an induced current in the magnetic ring 8, causing the 3 external trigger solid-state switches 7 of the high-voltage pulse source to conduct and generating a potential difference between the electrodes of the self-breakdown solid-state switches;

[0059] S3. When the rate of change of the potential difference reaches the conduction threshold dU / dt of the self-breakdown solid-state switches, each self-breakdown solid-state switch conducts on its own. After all the self-breakdown solid-state switches conduct, the Marx generator is established, completing the triggering of the high-voltage pulse source.

[0060] As Figure 4 shown, to solve the problem of the anti-space electromagnetic interference of the solid-state switches, an optical triggering system for a high-voltage pulse source based on solid-state switches as described above includes N encapsulation housings 13, N = 1; inside each encapsulation housing 13, there are arranged a magnetic ring 8, a drive circuit board 9, an optoelectronic converter 10, and a voltage dividing circuit; all the external trigger solid-state switches 7 in the high-voltage pulse source are respectively encapsulated in N encapsulation housings 13.

[0061] The drive circuit board 9 forms a first loop by leading out wires through the magnetic ring 8, and the trigger electrodes of all the external trigger solid-state switches 7 of the high-voltage pulse source form a second loop by leading out wires through the magnetic ring 8; the voltage dividing circuit includes a zener diode 11 and a voltage dividing resistor 12; the positive electrode of the zener diode 11 is connected to the power supply terminal of the drive circuit board 9, and the negative electrode is connected to one end of the voltage dividing resistor 12; the other end of the voltage dividing resistor 12 is connected to the positive electrode of the external high-voltage power supply. The drive circuit board 9 transmits an electrical pulse signal through the magnetic ring 8, and the magnetic ring 8 generates an induced current to turn on the external trigger solid-state switch 7. The drive circuit board 9 and the external trigger solid-state switch 7 are isolated by the magnetic ring 8, thereby protecting the drive circuit board 9.

[0062] The receiving end of the optoelectronic converter 10 is used to receive an external optical signal, and the output end is connected to the trigger end of the drive circuit board 9, and is used to convert the optical signal into an electrical pulse signal and then transmit it to the drive circuit board 9; when the drive circuit board 9 receives the electrical pulse signal, the first loop is turned on, and at the same time, an induced current is generated in the magnetic ring 8 to turn on the second loop, thereby triggering the high-voltage pulse source to output pulses in the order of hundreds of kV.

[0063] In this embodiment, the packaging shell 13 and one external trigger solid-state switch 7, one magnetic ring 8, a drive circuit board 9, an optoelectronic converter 10, and a voltage dividing circuit arranged inside the packaging shell 13 are integrally packaged together by special materials to form an optical trigger solid-state switch. The external ports of the switch are positive and negative electrodes and an optical fiber feed inlet, and the external trigger signal is optical fiber triggering. The optical fiber signal is converted into an electrical pulse signal by the optoelectronic converter 10 and fed into the drive circuit board 9. The drive circuit board 9 shapes and amplifies the signal and then feeds it into the external trigger solid-state switch 7 to turn it on.

[0064] The internal drive circuit board 9 and the external trigger solid-state switch 7 are coupled through the magnetic ring 8. The electrodes of the external trigger solid-state switch 7 and the drive circuit board 9 are connected in series through the voltage dividing resistor 12 and the zener diode 11. When the external high-voltage power supply applies power to the electrodes of the external trigger solid-state switch 7, the drive circuit board 9 is powered through the voltage dividing resistor 12 and the zener diode 11, without the need for an additional low-voltage power supply, simplifying the system structure.

[0065] In addition, the present invention also provides a method for triggering a high-voltage pulse source based on a solid-state switch. Based on the above-mentioned optical trigger system of the high-voltage pulse source based on a solid-state switch, it includes the following steps:

[0066] S1. Charge the n capacitors C of the high-voltage pulse source through the respective charging resistors R1;

[0067] S2. When the n capacitors C are charged to a preset voltage U0, the optoelectronic converter 10 receives an external optical signal and converts it into an electrical pulse signal and sends it to the drive circuit board 9;

[0068] S3. The electrical pulse signal received by the drive circuit board 9 generates an induced current in the magnetic ring 8, causing all the external trigger solid-state switches 7 of the high-voltage pulse source to conduct, and generating a potential difference between the self-breakdown solid-state switch electrodes;

[0069] S4. When the rate of change of the potential difference reaches its conduction threshold dU / dt, each self-breakdown solid-state switch conducts on its own. After all the self-breakdown solid-state switches are conducted, the Marx generator is established, completing the triggering of the high-voltage pulse source.

Claims

1. A high voltage pulse source based on a solid-state switch, characterized in that: It includes n charging resistors R1 connected in series, n grounding resistors R2 connected in series, one load resistor R3 and n charging units connected in series, where n is an integer greater than or equal to 3; The charging unit includes a solid-state switch S and a capacitor C connected to the solid-state switch S at one end; One end of the first grounding resistor R2 is grounded, the other ends of the first to n-1th grounding resistors R2 are connected between the capacitor C of the corresponding charging unit and the solid-state switch S of the next-stage charging unit, and the other end of the nth grounding resistor R2 is connected to the other end of the capacitor C of the nth-stage charging unit; One end of the load resistor R3 is grounded, and the other end is connected to the other end of the nth charging unit capacitor C; One end of the first charging resistor R1 is connected to the output end of the external high-voltage power supply, and the other ends of the first to nth charging resistors R1 are connected between the solid-state switch S and the capacitor C of the corresponding charging unit; the charging unit connected to the other end of the first charging resistor R1 is used as the first-level charging unit; the solid-state switch S in the first m-level charging units is an externally triggered solid-state switch (7), and the solid-state switch S in the last nm-level charging units is a self-breakdown solid-state switch, and the externally triggered solid-state switch (7) is used to connect to an external trigger device; the other end of the capacitor C in the n-th level charging unit is used to connect to an external load, m≥1; When the n capacitors C are charged to a preset voltage U0, all externally triggered solid-state switches (7) receive an external trigger signal and are turned on, and the rate of change of the potential difference between the electrodes of the self-breakdown solid-state switch reaches its turn-on threshold dU / dt, and each self-breakdown solid-state switch turns on by itself. After all the self-breakdown solid-state switches are turned on, the Marx generator is established and outputs a pulse of the order of hundreds of kV.

2. The high voltage pulse source based on solid-state switch according to claim 1, characterized in that: The conduction threshold dU / dt of the self-breakdown solid-state switch is on the order of 100 kV / μs.

3. An electric triggering system of a high voltage pulse source based on a solid-state switch according to claim 1 or 2, characterized in that: It comprises N magnetic rings (8) and a driving circuit board (9) which are the same in number as the external trigger solid-state switches (7), where N≥1; The driving circuit board (9) forms a first loop by leading out a wire through a magnetic ring (8), and the trigger electrodes of all externally triggered solid-state switches (7) of the high-voltage pulse source respectively pass through the same magnetic ring (8) through leading out a wire to form a second loop; or, the driving circuit board (9) forms a first loop by leading out a wire through N magnetic rings (8) in sequence, and the trigger electrodes of all externally triggered solid-state switches (7) of the high-voltage pulse source respectively pass through N magnetic rings (8) through leading out a wire to form a second loop; The power supply end of the driving circuit board (9) is used to be connected to the positive electrode of an external low-voltage power supply, and its voltage is less than or equal to 100V; When the n capacitors C of the high-voltage pulse source are charged to a preset voltage U0, the first circuit of the driving circuit board (9) is turned on upon receiving an external trigger signal, and the second circuit of the induced current generated in the magnetic ring (8) is turned on, and the corresponding externally triggered solid-state switch (7) is turned on. When the rate of change of the potential difference loaded between the electrodes of all the self-breakdown solid-state switches reaches its turn-on threshold dU / dt, each self-breakdown solid-state switch turns on by itself. After all the self-breakdown solid-state switches are turned on, the Marx generator is established and outputs a pulse of the order of hundreds of kV.

4. The electric triggering system of the high voltage pulse source based on solid-state switch according to claim 3 is characterized in that: Said N=3.

5. An electrical triggering method of a high voltage pulse source based on a solid-state switch, based on the electrical triggering system of a high voltage pulse source based on a solid-state switch according to claim 3 or 4, characterized in that: The following steps are involved: S1, charging n capacitors C of the high voltage pulse source through each charging resistor R1; S2, when the n capacitors C are charged to a preset voltage U0, the driving circuit board (9) receives an electric pulse signal, and the electric pulse signal generates an induced current in the magnetic ring (8), so that all externally triggered solid-state switches (7) of the high-voltage pulse source are turned on, and a potential difference is generated between the electrodes of the self-breakdown solid-state switches; S3. When the rate of change of the potential difference reaches the conduction threshold dU / dt of the self-breakdown solid-state switch, each self-breakdown solid-state switch turns on by itself. After all the self-breakdown solid-state switches are turned on, the Marx generator is established and the triggering of the high voltage pulse source is completed.

6. An optical triggering system of a high voltage pulse source based on a solid-state switch according to claim 1 or 2, characterized in that: comprising N packaging shells (13), N≥1; Each packaging shell (13) is provided with a magnetic ring (8), a driving circuit board (9), a photoelectric converter (10) and a voltage divider circuit; All externally triggered solid-state switches (7) in the high-voltage pulse source are respectively packaged in N packaging shells (13); The driving circuit board (9) forms a first loop by leading out a wire through a magnetic ring (8), and the trigger electrodes of the external trigger solid-state switch (7) of the high-voltage pulse source respectively form a second loop by leading out a wire through the same magnetic ring (8); One end of the voltage divider circuit is connected to the power supply end of the driving circuit board (9), and the other end is connected to the positive electrode of the external high-voltage power supply; The receiving end of the photoelectric converter (10) is used to receive an external optical signal, and the output end is connected to the trigger end of the driving circuit board (9) and is used to convert the optical signal into an electrical pulse signal and transmit it to the driving circuit board (9); when the driving circuit board (9) receives the electrical pulse signal, the first circuit is turned on, and at the same time, the induced current generated in the magnetic ring (8) is turned on, thereby triggering the high-voltage pulse source to output a pulse of the order of hundreds of kV.

7. The optical triggering system of the high voltage pulse source based on solid-state switch according to claim 6, characterized in that: The voltage dividing circuit comprises a voltage stabilizing diode (11) and a voltage dividing resistor (12); The positive electrode of the voltage-stabilizing diode (11) is connected to the power supply end of the driving circuit board (9), and the negative electrode is connected to one end of a voltage-dividing resistor (12); the other end of the voltage-dividing resistor (12) is connected to the positive electrode of an external high-voltage power supply.

8. The optical triggering system of the high voltage pulse source based on solid-state switch according to claim 7, characterized in that: Said N=1.

9. A method for triggering a high voltage pulse source based on a solid-state switch, based on the optical triggering system of a high voltage pulse source based on a solid-state switch according to any one of claims 6 to 8, characterized in that: The following steps are involved: S1, charging n capacitors C of the high voltage pulse source through each charging resistor R1; S2. When the n capacitors C are charged to a preset voltage U0, the photoelectric converter (10) receives an external optical signal and converts it into an electrical pulse signal and sends it to the driving circuit board (9); S3, the electric pulse signal received by the driving circuit board (9) generates an induced current in the magnetic ring (8), so that all the externally triggered solid-state switches (7) of the high-voltage pulse source are turned on and a potential difference is generated between the electrodes of the self-breakdown solid-state switches; S4. When the rate of change of the potential difference reaches its conduction threshold dU / dt, each self-breakdown solid-state switch turns on by itself. After all the self-breakdown solid-state switches are turned on, the Marx generator is established and the triggering of the high voltage pulse source is completed.

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