A continuous multi-pulse generating circuit and control method of a common discharge loop

Abstract

The present application belongs to the field of pulse power and laser control, and relates to a continuous multi-pulse generation circuit and control method sharing a discharge loop, comprising a plurality of continuous multi-pulse generation circuits, each of which comprises a plurality of charging loops, a plurality of voltage dividing sampling resistors, a plurality of discharge switches and a shared discharge loop; the charging loop is used to form a charging path when the discharge switch is turned off, and comprises a charging module, a diode, a charging damping resistor, a charging damping inductor and an energy storage capacitor module; the voltage dividing sampling resistor is used to sample and divide the voltage of the positive electrode of the energy storage capacitor module, and the low-voltage signal obtained by voltage division is used as the feedback control input for adjusting the charging voltage of the charging module; the shared discharge loop is used to generate a current pulse when the switch is turned on, and the plurality of continuous multi-pulse generation circuits respectively form a plurality of discharge loops with the shared discharge loop; the hardware configuration of the discharge loop is simplified, and a multi-pulse string with flexible configuration attributes can be generated.

Description

Technical Field

[0001] This invention relates to the field of pulse power and laser control, and specifically discloses a continuous multi-pulse generation circuit and control method with a shared discharge circuit. Background Technology

[0002] High-voltage, high-current pulse generation circuit systems are widely used in cutting-edge technology research fields such as fusion energy special laser systems, precision machining laser systems, and high-voltage, high-current pulsed power systems. The high-voltage, high-current transient pulses they generate provide the necessary driving power for the downstream loads, making them an important component of these special laser systems and pulsed power systems. Although existing high-voltage, high-current pulse generation circuit systems possess a certain transient pulse generation capability, they generally suffer from inherent defects such as bulky and cumbersome devices, inability to continuously generate multiple pulses, and constraints on the adjustment of output current pulse waveform parameters, thus failing to meet the needs of current cutting-edge technology research and development.

[0003] In view of this, the present invention provides a continuous multi-pulse generation circuit and control method with a shared discharge circuit. By employing multi-pulse generation technology using a shared discharge circuit, the hardware configuration of the discharge circuit is simplified, and the peak current, pulse width, and other current waveform parameters of the multi-pulse can be independently adjusted, enabling the generation of multi-pulse trains with flexible configuration attributes. This expands and enriches the traditional high-voltage, high-current pulse generation circuit system, providing more operating mode options for special laser systems and pulse power systems, supporting corresponding scientific research. Summary of the Invention

[0004] The purpose of this invention is to provide a continuous multi-pulse generation circuit and control method with a shared discharge circuit, addressing the problem of how to expand and enrich the traditional high-voltage, high-current pulse generation circuit system to provide more operating mode options for special laser systems and pulse power systems, supporting relevant scientific research; the specific solution is as follows:

[0005] A continuous multi-pulse generation circuit with a shared discharge circuit includes multiple continuous multi-pulse generation circuits. Each continuous multi-pulse generation circuit includes multiple charging circuits, multiple voltage divider sampling resistors, multiple discharge switches, and a shared discharge circuit. The charging circuits form a charging path when the discharge switches are open, and include a charging module, a diode, a charging damping resistor, a charging damping inductor, and an energy storage capacitor module. The voltage divider sampling resistors sample and divide the positive voltage of the energy storage capacitor module, and use the low-voltage signal obtained from the voltage division as feedback control input for adjusting the charging voltage of the charging module. The discharge switches generate current pulses and charge the charging circuits by switching on and off. The shared discharge circuit generates current pulses when the switches are on. The multiple continuous multi-pulse generation circuits and the shared discharge circuit form multiple discharge circuits.

[0006] Furthermore, the energy storage capacitor module is used to obtain the rated energy storage voltage and the rated total energy storage, and is composed of multiple capacitors connected in series and parallel.

[0007] Furthermore, the shared discharge circuit includes a control module, a waveform adjustment inductor, a waveform adjustment resistor, a coaxial transmission line, and a load; the control module includes a logic control unit and a synchronization timing generation unit; the logic control unit is used to set target voltage values ​​for the charging modules of multiple charging circuits respectively; the synchronization timing generation unit is used to output the conduction control timing of the discharge switch.

[0008] Furthermore, the charging module generates a charging voltage based on the feedback control input and the target voltage value, including a voltage acquisition and feedback control unit and a charging power output module.

[0009] Furthermore, diodes are used to prevent current from flowing back into the charging module.

[0010] Furthermore, multiple discharge circuits operate independently, and the trigger delay between the trigger signal of the previous discharge circuit and the trigger signal of the next discharge circuit in the conduction control timing is greater than the current pulse width of the previous discharge circuit.

[0011] Furthermore, the discharge switch is a thyristor solid-state switch, an IGBT switch group, or an ignition tube.

[0012] This invention also provides a continuous multi-pulse generation control method for a shared discharge circuit, applied to the aforementioned continuous multi-pulse generation circuit of the shared discharge circuit, including a charging process: disconnecting the discharge switch; the charging current output by the charging module flows sequentially through a diode, a charging damping resistor, a charging damping inductor, and an energy storage capacitor module to form a charging path; the positive voltage of the energy storage capacitor module is sampled and divided to obtain a low-voltage signal; the low-voltage signal is sent to the charging module as a feedback control input for the charging voltage.

[0013] Furthermore, it also includes the discharge process: when the discharge switch is turned on, the electrical energy stored in the energy storage capacitor module is instantaneously discharged to the load through the charging damping inductor, charging damping resistor, discharge switch, waveform adjustment inductor, waveform adjustment resistor and coaxial transmission line.

[0014] Furthermore, the relationship between voltage and current in the discharge circuit is as follows:

[0015] ;

[0016] in, This is the voltage of the discharge circuit; This refers to the current in the discharge circuit. This is the inductance value of the charging damping inductor; For charging damping resistor; To differentiate the discharge circuit current over time; The resistance value of the waveform adjustment resistor; Adjust the inductance value of the inductor to control the waveform; This is the equivalent inductance of the coaxial transmission line; This is the equivalent resistance of the coaxial transmission line; This is the equivalent resistance of the load.

[0017] The present invention has the following advantages and beneficial effects:

[0018] The multiple continuous multi-pulse generation circuits of the present invention share the same discharge circuit, which simplifies the hardware configuration of the discharge circuit and makes it possible to miniaturize the device.

[0019] The continuous multi-pulse generation circuit and control method of the present invention can adjust the peak current, pulse width and other current waveform parameters of the output pulse by setting the target voltage, thereby achieving the adjustment of the discharge pulse and having the flexibility to adapt to various application scenarios.

[0020] In the continuous multi-pulse generation circuit of the present invention, different charging and discharging circuits are relatively independent, and different discharging circuits can output pulse waveforms with different characteristics, so that the continuous multi-pulse has better editability. Attached Figure Description

[0021] Figure 1 An exemplary circuit diagram of a continuous multi-pulse generation circuit for a shared discharge circuit provided by the present invention;

[0022] Figure 2 An exemplary circuit diagram of the charging circuit provided by the present invention;

[0023] Figure 3 An exemplary circuit diagram of the discharge circuit provided by the present invention;

[0024] Figure 4 This is an exemplary schematic diagram of the continuous pulses output by the present invention;

[0025] Figure 5 This is an exemplary schematic diagram of the conduction control timing of the present invention. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0027] This invention provides a continuous multi-pulse generation circuit and control method for a shared discharge circuit. For example... Figure 1 and Figure 2 As shown, the continuous multi-pulse generation circuit includes a control module. Charging module ( ~ ),diode( ~ ), charging damping inductor ( ~ ), charging damping resistor ( ~ ), energy storage capacitor module ( ~ ), voltage divider sampling resistor ( ~ , ~ ), discharge switch ( ~ ), waveform adjustment inductor Waveform adjustment resistor Coaxial transmission line and load .

[0028] Among them, the charging module ( ~ ),diode( ~ ), charging damping resistor ( ~ ), charging damping inductor ( ~ ), energy storage capacitor module ( ~ ) are connected in sequence to form multiple charging circuits. ~ ),like Figure 2 As shown. Voltage divider sampling resistor ( ~ , ~ ) for energy storage capacitor modules ( ~ The positive voltage of ) ~ Real-time sampling, and the low-voltage signal after voltage division ( ~ ) is sent into the charging module ( ~ ), serving as the feedback control input for the charging voltage. Energy storage capacitor module ( ~ It consists of multiple high-energy-density capacitors connected in series and parallel to obtain the rated energy storage voltage and rated total energy storage capacity required by the system. A single charging module ( ~ ) are respectively composed of voltage acquisition and feedback control unit ( ~ ), charging power output module ( ~ )constitute.

[0029] like Figure 2 As shown, with charging circuit For example, discharge switch Disconnect the charging module. The output charging current flows through the diodes in sequence. Charging damping resistor Charging damping inductor to energy storage capacitor module This forms a complete charging path; energy storage capacitor module positive voltage After real-time sampling and voltage division, a low-voltage test signal is obtained. As a charging module Feedback control basis for real-time adjustment of charging voltage.

[0030] Energy storage capacitor module ( ~ ), charging damping inductor ( ~ ), charging damping resistor ( ~ ), discharge switch ( ~ ), waveform adjustment inductor Waveform adjustment resistor Coaxial transmission line ,load They are connected in sequence to form a common discharge circuit. During the discharge process, the diodes ( ~ This prevents reverse current from flowing back into the charging module. ~ The waveform adjustment inductor in the discharge circuit plays a crucial role in ensuring system safety. Waveform adjustment resistor Coaxial transmission line ,load This is a common circuit part of the multi-pulse discharge circuit.

[0031] like Figure 3 As shown, the discharge circuit For example, discharge switch Turn on, energy storage capacitor module The stored electrical energy is passed through the charging damping inductor. Charging damping resistor Discharge switch Waveform adjustment inductor Waveform adjustment resistor Coaxial transmission line For load This creates a momentary discharge, generating a large current pulse. Similarly, the discharge circuit... ~ The principle is the same. Discharge circuit The relationship between voltage and current is as follows:

[0032] ;

[0033] in, This is the voltage of the discharge circuit; This refers to the current in the discharge circuit. This is the inductance value of the charging damping inductor; For charging damping resistor; To differentiate the discharge circuit current over time; The resistance value of the waveform adjustment resistor; Adjust the inductance value of the inductor to control the waveform; This is the equivalent inductance of the coaxial transmission line; This is the equivalent resistance of the coaxial transmission line; This is the equivalent resistance of the load.

[0034] Control module By logic control unit and synchronization timing generation unit Configuration. In some embodiments, via a logic control unit. For charging module ( ~ Set the target voltage value, and within a certain range, control the peak current of the output pulse. Pulse bottom width And adjust other waveform shape parameters (such as) Figure 4 Furthermore, different charging modules can be independently set with different target voltages, and different discharge circuits can output pulse waveforms with different characteristics, possessing the feature of continuously editable pulses.

[0035] Synchronous timing generation unit Output multiple trigger signals ( ~ ), respectively serving as discharge switches ( ~ The conduction control timing of ( ). For example... Figure 5 As shown, when Signal output to discharge switch The discharge switch immediately Conduction, discharge circuit Discharge immediately, generating a current pulse. Similarly, ~ After the signal is output to the corresponding discharge switch, current pulses are generated respectively. ~ , .

[0036] This invention provides a continuous multi-pulse generation control method for a shared discharge circuit, relating to the generation and transmission of high-voltage, high-current, strong pulse signals. The continuous multi-pulse generation circuit shares the same discharge circuit. During normal operation, each discharge circuit must operate independently, and simultaneous operation of two or more discharge circuits should be avoided to prevent damage to the components. Therefore, the timing control method for the continuous multi-pulse generation circuit is fundamental to ensuring the normal, safe, and orderly operation of the circuit. Figure 5 As shown, in order to achieve independent time-sharing operation of all discharge circuits, its multiple trigger signals ( ~ Overlapping timeframes should be avoided. and , and For example, specific timing control measures are: relatively Trigger delay between It should be at least greater than Pulse bottom width Similarly, relatively Trigger delay between It should be at least greater than Pulse bottom width In addition, a certain time margin is set.

[0037] The continuous multi-pulse generation circuit proposed in this invention has a discharge switch ( ~ Typical selections include thyristor solid-state switches, IGBT switch groups, and ignition tubes, with the discharge switch possessing sufficient reverse voltage withstand capability. During continuous multi-pulse generation circuit discharge operation, when any circuit discharge switch is turned on, the resulting high-voltage, high-current signal will impact the cathodes of other circuit discharge switches. This invention, through reasonable selection of discharge switch components and parameter design, ensures that the discharge switch has the ability to withstand the reverse impact of discharge pulses, thus guaranteeing system reliability.

[0038] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A continuous multi-pulse generation circuit with a shared discharge circuit, characterized in that, It includes multiple continuous multi-pulse generation circuits, each of which includes multiple charging circuits, multiple voltage divider sampling resistors, multiple discharge switches, and a common discharge circuit. The charging circuit is used to form a charging path when the discharge switch is open. For each charging circuit, the discharge switch is open, and the charging module outputs a charging current that flows sequentially through the diode, the charging damping resistor, the charging damping inductor, and the energy storage capacitor module to form a complete charging path. The voltage divider sampling resistor is used to sample and divide the positive voltage of the energy storage capacitor module, and the low voltage signal obtained by voltage division is used as the feedback control input for the charging module to adjust the charging voltage. The discharge switch generates current pulses and charges the charging circuit by switching on and off. A shared discharge circuit is used to generate current pulses when the switch is turned on. Multiple continuous multi-pulse generation circuits are connected to the shared discharge circuit to form multiple discharge circuits. The energy storage capacitor module, charging damping inductor, charging damping resistor, discharge switch, waveform adjustment inductor, waveform adjustment resistor, coaxial transmission line and load are connected in sequence to form the shared discharge circuit. The waveform adjustment inductor, waveform adjustment resistor, coaxial transmission line and load in the discharge circuit are the common circuit parts of the multi-pulse discharge circuit. Multiple discharge circuits work independently. In the turn-on control sequence, the trigger delay between the trigger signal of the previous discharge circuit and the trigger signal of the next discharge circuit is greater than the current pulse width of the previous discharge circuit. Different charging modules are independently set with different target voltages, and different discharge circuits output pulse waveforms with different characteristics. The control module includes a logic control unit and a synchronization timing generation unit; The logic control unit is used to set the target voltage value for the charging modules of multiple charging circuits respectively; The synchronous timing generation unit is used to output the conduction control timing of the discharge switch; when the signal is output to the corresponding discharge switch, the discharge switch is immediately turned on, the corresponding discharge circuit is immediately discharged, and a current pulse is generated.

2. The continuous multi-pulse generation circuit of the shared discharge circuit according to claim 1, characterized in that, The energy storage capacitor module is used to obtain the rated energy storage voltage and the rated total energy storage, and is composed of multiple capacitors connected in series and parallel.

3. The continuous multi-pulse generation circuit of the shared discharge circuit according to claim 1, characterized in that, The charging module generates a charging voltage based on the feedback control input and the target voltage value, and includes a voltage acquisition and feedback control unit and a charging power output module.

4. The continuous multi-pulse generation circuit of the shared discharge circuit according to claim 3, characterized in that, The diode is used to prevent current from flowing back into the charging module.

5. The continuous multi-pulse generation circuit of the shared discharge circuit according to claim 1, characterized in that, The discharge switch is a thyristor solid-state switch, an IGBT switch group, or an ignition tube.

6. A continuous multi-pulse generation control method for a shared discharge circuit, characterized in that, The continuous multi-pulse generation circuit applied to the shared discharge circuit as described in any one of claims 1-5 includes a charging process: Disconnect the discharge switch; The charging current output by the charging module flows sequentially through the diode, charging damping resistor, charging damping inductor and energy storage capacitor module to form a charging path; The positive voltage of the energy storage capacitor module is sampled and divided to obtain a low-voltage signal; A low-voltage signal is sent to the charging module as a feedback control input for the charging voltage.

7. The continuous multi-pulse generation control method for a shared discharge circuit according to claim 6, characterized in that, It also includes the discharge process: When the discharge switch is turned on, the electrical energy stored in the energy storage capacitor module discharges instantaneously to the load through the charging damping inductor, charging damping resistor, discharge switch, waveform adjustment inductor, waveform adjustment resistor and coaxial transmission line.

8. The continuous multi-pulse generation control method for a shared discharge circuit according to claim 7, characterized in that, The relationship between voltage and current in the discharge circuit is as follows: ； in, This is the voltage of the discharge circuit; This refers to the current in the discharge circuit. This is the inductance value of the charging damping inductor; For charging damping resistor; To differentiate the discharge circuit current over time; The resistance value of the waveform adjustment resistor; Adjust the inductance value of the inductor to control the waveform; This is the equivalent inductance of the coaxial transmission line; This is the equivalent resistance of the coaxial transmission line; This is the equivalent resistance of the load.

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