A kind of excitation compensation topology and control method for output current waveform adjustment of pulse generator discharge later stage

Abstract

The present application belongs to the field of energy storage motor and pulse power technology, and particularly relates to an excitation compensation topology for output current waveform adjustment in the later stage of discharge of a pulse generator and a control method thereof, aiming to solve the problem that the traditional excitation topology is only composed of a high-voltage capacitor and a thyristor, the topology is relatively simple, and the excitation current waveform adjustment capability is limited. The present application comprises: a compensation capacitor charging circuit, gate turn-off thyristors G s1 , gate turn-off thyristors G s2 , gate turn-off thyristors G s3 and freewheeling diodes D n ; the compensation capacitor charging circuit comprises n pulse capacitors C, n-1 discharge thyristors S, n-1 gate turn-off thyristors G and n-1 diodes D. The excitation compensation topology of the present application realizes effective adjustment and rapid compensation of the output current waveform in the later stage of discharge of the pulse generator through the use of high-power switching tubes and a compensation capacitor group, and enhances the flexibility and efficiency of the system.

Description

Technical Field

[0001] This invention belongs to the field of energy storage motor and pulse power technology, and specifically relates to an excitation compensation topology and its control method for adjusting the output current waveform in the later stage of pulse generator discharge. Background Technology

[0002] Pulsed power technology, with its characteristics of short-duration, high-power output, has been widely applied in numerous fields, including plasma physics and controlled nuclear fusion research, nuclear explosion simulation, high-power lasers, and electromagnetic propulsion. High-power pulsed power supplies, as a key component of pulsed power technology, clearly hold a prominent position and importance. The pursuit of higher power and energy storage density remains a consistent development trend for high-power pulsed power supplies. Capacitor energy storage, due to its simple structure and high power density, has been widely used and researched in high-power pulsed power supplies, and is the most mature form. However, its relatively low energy storage density has always been an obstacle to further development. Increasing the power supply capacity necessitates increasing the size and weight, which obviously limits the system's portability and flexibility. To overcome this obstacle, energy storage forms with higher energy density have been continuously explored.

[0003] Pulse generators store energy through the high-speed rotation of a large-inertia flywheel rotor, offering advantages such as long storage time, high energy density, high power density, and compact structure, making them ideal energy storage carriers for high-pulse power supplies. Over the years, pulse generators have evolved into rotary and hollow-core structures. Essentially, a pulse generator is a type of hollow-core electrically excited synchronous generator. Regardless of whether it operates in pulse-excited or self-excited mode, it requires an external capacitor to construct the working magnetic field. The hollow-core design necessitates a large excitation current to establish excitation; therefore, pulse generators typically employ a self-excited operating mode. In self-excited mode, a relatively low-voltage capacitor provides the starting current to the pulse generator's excitation winding. The excitation current of a pulse generator is directly related to its output current waveform; adjusting the excitation current waveform directly regulates the output current waveform. However, traditional excitation topologies consist only of high-voltage capacitors and thyristors, resulting in a relatively simple topology and limited excitation current waveform adjustment capabilities.

[0004] Based on this, the present invention proposes an excitation compensation topology and its control method for adjusting the output current waveform in the later stage of pulse generator discharge. Summary of the Invention

[0005] To address the aforementioned problems in the prior art, namely the limitation of the excitation current waveform adjustment capability due to the traditional excitation topology consisting only of a high-voltage capacitor and a thyristor, which is relatively simple, this invention provides an excitation compensation topology and its control method for adjusting the output current waveform during the later stage of pulse generator discharge.

[0006] The first aspect of the present invention provides an excitation compensation topology for regulating the output current waveform during the later stage of discharge of a pulse generator, which is connected to a rectified voltage and a load, and includes a compensation capacitor charging circuit and a freewheeling diode; the compensation capacitor charging circuit includes n pulse capacitors C, n-1 discharge thyristors S, n-1 gate turn-off thyristors G and n-1 diodes D;

[0007] n pulse capacitors C are connected in parallel. Except for the first pulse capacitor C, each of the other pulse capacitors C is equipped with a discharge thyristor S, a diode D, and a gate turn-off thyristor G. The positive terminal of the first pulse capacitor is connected to the first terminal of the rectified voltage, and the negative terminal of the first pulse capacitor is connected to the first node Q1. The first node Q1 is connected to the second terminal of the rectified voltage.

[0008] A gate turn-off thyristor G is connected between the positive terminal of the pulse capacitor at the first end and the first terminal of the rectified voltage. S2 The gate turn-off thyristor G S2 The positive terminal and gate of the thyristor G can be turned off. S1 The positive terminal connection allows the gate to turn off the thyristor G. S1 The negative terminal is connected to the second node Q2, and the second node Q2 is connected to the gate turn-off thyristor G. S3 The negative terminal and freewheeling diode D n The negative terminal is connected to the first end of the load;

[0009] The gate turn-off thyristor G S3 The positive terminal of the diode is connected to the positive terminal of the pulse capacitor C at the tail end, and the freewheeling diode D... n The positive terminal is connected to the third node Q3, and the third node Q3 is connected to the first node Q1 and the second end of the load.

[0010] In some preferred embodiments, between two adjacent pulse capacitors, the positive terminal of the (n-1)th pulse capacitor is connected to the positive terminal of a diode, the negative terminal of the diode is connected to the positive terminal of the nth pulse capacitor, the negative terminal of the nth pulse capacitor is connected to the positive terminal of a gate turn-off thyristor, and the negative terminal of the gate turn-off thyristor is connected to the negative terminal of the (n-1)th pulse capacitor.

[0011] Between two adjacent pulse capacitors, the positive terminal of the (n-1)th pulse capacitor is connected to the positive terminal of a discharge thyristor, and the negative terminal of the discharge thyristor is connected to the negative terminal of the nth pulse capacitor.

[0012] In some preferred embodiments, the gate turn-off thyristor G S1 It is a bypass switch used to control the connection and disconnection time of the charging circuit of the compensation capacitor.

[0013] In some preferred embodiments, n-1 gate-turn-off thyristors G remain on during charging, so that the negative terminals of each pulse capacitor are directly connected to provide a circuit for parallel charging of the pulse capacitors, and remain off during series discharge.

[0014] In some preferred embodiments, the diode D is used to withstand reverse voltage and turn off during series discharge, thereby cutting off the parallel charging circuit.

[0015] In some preferred embodiments, n is a positive integer and n≥2.

[0016] In some preferred embodiments, the load is the excitation winding of a pulse generator.

[0017] In some preferred embodiments, opening the gate at the initial moment can turn off the thyristor G. S1 Closing the gate can turn off the thyristor G. s2 and gate turn-off thyristor G s3 This causes the rectified voltage to rise rapidly. Based on the charging voltage requirement of the pulse capacitor C, it is determined that opening the gate will turn off the thyristor G. s2 The time.

[0018] In some preferred embodiments, the rectified voltage is the armature voltage after rectification by the pulse generator.

[0019] A second aspect of the present invention provides a control method for an excitation compensation topology for regulating the output current waveform in the later stage of a pulse generator discharge. Based on an excitation compensation topology for regulating the output current waveform in the later stage of a pulse generator discharge, the method includes:

[0020] Step S1: Drive the pulse generator to its rated speed to store energy; charge the excitation capacitor to the required voltage.

[0021] Step S2: After the excitation module is triggered, the induced voltage generated by the armature winding of the pulse generator is rectified to produce a rectified voltage. The rectified voltage is then passed through G... s1 Discharge is applied to the excitation winding, and the current in the excitation winding rises accordingly, entering the self-excitation process;

[0022] In step S3, as self-excitation proceeds, the rectified voltage gradually increases. When the rectified voltage meets the set threshold, the gate is closed to turn off the thyristor G. s1 Opening the gate can turn off the thyristor G. s2 Gate turn-off thyristor G s3 And n-1 gate turn-off thyristors G, the rectified voltage discharges to the load, and at the same time charges n pulse capacitors through the compensation capacitor charging circuit.

[0023] In step S4, after the charging voltage of the n pulse capacitors reaches a preset value, the gate is closed to turn off the thyristor G. s2 Gate turn-off thyristor G s3 Entering the discharge preparation stage, the excitation current flows through the freewheeling diode D. n Circulation;

[0024] Step S5: After the discharge set time begins, the excitation current compensation stage begins. The n-1 gate turn-off thyristors G are closed, and the n-1 discharge thyristors S are opened. At this time, the n-1 diodes D are turned off due to reverse voltage. The first n-1 pulse capacitors are connected end to end through the discharge thyristors S and then discharge to the load, thereby achieving excitation current compensation.

[0025] The beneficial effects of this invention are:

[0026] This invention proposes an excitation compensation topology for adjusting the output current waveform during the later stages of pulse generator discharge. This topology can be used for rapid compensation of the excitation current during the later stages of pulse generator discharge, thereby compensating for the attenuation of the output current waveform. The topology uses high-power switching transistors to achieve parallel charging and series discharging of the compensation capacitor bank, which helps reduce the system withstand voltage level and enables rapid charging of the compensation capacitor bank. Introducing the compensation capacitor bank into the excitation circuit increases the control dimension of the pulse generator excitation circuit and improves the flexibility of pulse generator waveform regulation. High-power thyristors enable control of charging and discharging time and current loops, allowing for flexible switching between direct discharge of the pulse generator armature rectified voltage to the load, charging of the compensation capacitor bank by the armature rectified voltage, and simultaneous charging of the compensation capacitor bank and discharge to the excitation winding by the armature rectified voltage. Through reasonable switching, the influence of the compensation capacitor bank on the self-excitation process can be minimized. Attached Figure Description

[0027] Other features, objects, and advantages of this application will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings:

[0028] Figure 1 This invention relates to the overall equivalent circuit diagram of a pulse generator pulse power supply system;

[0029] Figure 2 This is a schematic diagram of an excitation compensation topology for adjusting the output current waveform during the later stage of pulse generator discharge, according to the present invention.

[0030] Figure 3 This is a first working schematic diagram of an excitation compensation topology for adjusting the output current waveform during the later stage of pulse generator discharge according to the present invention.

[0031] Figure 4 This is a second working schematic diagram of an excitation compensation topology for adjusting the output current waveform during the later stage of pulse generator discharge according to the present invention.

[0032] Figure 5 This is a third working schematic diagram of an excitation compensation topology for adjusting the output current waveform in the later stage of pulse generator discharge according to the present invention.

[0033] Figure 6 This is a fourth working schematic diagram of an excitation compensation topology for adjusting the output current waveform in the later stage of pulse generator discharge according to the present invention.

[0034] Figure 7 This is a fifth working schematic diagram of an excitation compensation topology for adjusting the output current waveform in the later stage of pulse generator discharge according to the present invention.

[0035] Figure 8 This is the sixth working schematic diagram of an excitation compensation topology for adjusting the output current waveform in the later stage of pulse generator discharge according to the present invention. Detailed Implementation

[0036] The present application will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for illustrative purposes only and are not intended to limit the invention. Furthermore, it should be noted that, for ease of description, only the parts relevant to the invention are shown in the accompanying drawings.

[0037] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0038] This invention discloses an excitation compensation topology for adjusting the output current waveform in the later stage of a pulse generator discharge, offering significant advantages in the field of millisecond-level flat-top pulse current output. The topology utilizes high-power switching transistors to achieve parallel charging and series discharging of the compensation capacitor bank, which helps reduce the system withstand voltage and enables rapid charging of the compensation capacitor bank. Introducing the compensation capacitor bank into the excitation circuit increases the control dimension of the pulse generator excitation circuit and improves the flexibility of pulse generator waveform regulation. High-power thyristors enable control of charging and discharging time and current loop, minimizing the impact of the compensation capacitor bank on the self-excitation process.

[0039] See Figure 1 and Figure 2 The first embodiment of the present invention provides an excitation compensation topology for adjusting the output current waveform in the later stage of a pulse generator discharge, which is connected to a rectified voltage and a load, and includes a compensation capacitor charging circuit and a freewheeling diode; the compensation capacitor charging circuit includes n pulse capacitors C, n-1 discharge thyristors S, n-1 gate turn-off thyristors G, and n-1 diodes D;

[0040] n pulse capacitors C are connected in parallel. Except for the first pulse capacitor C, each of the other pulse capacitors C is equipped with a discharge thyristor S, a diode D, and a gate turn-off thyristor G. The positive terminal of the first pulse capacitor is connected to the first terminal of the rectified voltage, and the negative terminal of the first pulse capacitor is connected to the first node Q1. The first node Q1 is connected to the second terminal of the rectified voltage.

[0041] A gate turn-off thyristor G is connected between the positive terminal of the pulse capacitor at the first end and the first terminal of the rectified voltage. S2 The gate turn-off thyristor G S2 The positive terminal and gate of the thyristor G can be turned off. S1 The positive terminal connection allows the gate to turn off the thyristor G. S1 The negative terminal is connected to the second node Q2, and the second node Q2 is connected to the gate turn-off thyristor G. S3 The negative terminal and freewheeling diode D n The negative terminal is connected to the first end of the load;

[0042] The gate turn-off thyristor G S3 The positive terminal of the diode is connected to the positive terminal of the pulse capacitor C at the tail end, and the freewheeling diode D... n The positive terminal is connected to the third node Q3, and the third node Q3 is connected to the first node Q1 and the second end of the load.

[0043] Among them, see Figure 1 ,like Figure 1 As shown, the load is the excitation winding of a pulse generator. The rectified voltage is the armature voltage after rectification by the pulse generator. ① is the excitation power supply cabinet, ② is the self-excited rectifier bridge, ③ is the discharge rectifier, ④ is the pulse generator, ⑤ is the drive motor, ⑥ is the load, and ⑦ is the excitation compensation topology of this invention. Except for the excitation compensation topology shown in ⑦, the remaining structures are all prior art, and this invention will not elaborate on their structures.

[0044] A gate turn-off thyristor G is connected between the positive terminal of the pulse capacitor at the first end and the first terminal of the rectified voltage. S2 Specifically:

[0045] The positive terminal of the pulse capacitor at the beginning and the gate turn-off thyristor G S2 The negative terminal is connected, and the gate can turn off the thyristor G. S2 The positive terminal is connected to the first terminal of the rectified voltage.

[0046] In this embodiment, the structure of the compensation capacitor charging circuit is as follows:

[0047] Between two adjacent pulse capacitors, the positive terminal of the (n-1)th pulse capacitor is connected to the positive terminal of a diode, the negative terminal of the diode is connected to the positive terminal of the nth pulse capacitor, the negative terminal of the nth pulse capacitor is connected to the positive terminal of a gate turn-off thyristor, and the negative terminal of the gate turn-off thyristor is connected to the negative terminal of the (n-1)th pulse capacitor.

[0048] Between two adjacent pulse capacitors, the positive terminal of the (n-1)th pulse capacitor is connected to the positive terminal of a discharge thyristor, and the negative terminal of the discharge thyristor is connected to the negative terminal of the nth pulse capacitor.

[0049] In this invention, a parallel charging and series discharging method is adopted, which helps to reduce the system withstand voltage level and shorten the charging time during charging; during discharging, each pulse capacitor is connected end to end through a thyristor, which increases the discharge voltage, increases the rise rate of the excitation current, and realizes rapid compensation of the excitation current.

[0050] Among them, the gate turn-off thyristor G S1 It is a bypass switch used to control the connection and disconnection time of the charging circuit of the compensation capacitor.

[0051] Specifically, the gate turn-off thyristor G S2 The gate can turn off the thyristor G to control when to discharge to the compensation capacitor bank. S3 Control when the compensation capacitor bank discharges to the excitation winding.

[0052] The n-1 gate-turn-off thyristors G remain on during charging, directly connecting the negative terminals of each pulse capacitor to provide a circuit for parallel charging of the pulse capacitors. They remain off during series discharge to prevent short circuits in the pulse capacitors caused by the conduction of the series discharge thyristors.

[0053] In this circuit, diode D is used to withstand reverse voltage and turn off during series discharge, thereby cutting off the parallel charging circuit.

[0054] In this embodiment, n is a positive integer and n≥2, and the rectified voltage is the armature voltage after rectification by the pulse generator.

[0055] This invention aims to shorten the system's self-excitation time and achieve rapid charging of the compensation capacitor bank. Initially, opening the gate allows the thyristor G to be turned off. s1Closing the gate can turn off the thyristor G. s2 and gate turn-off thyristor G s3 This causes the rectified voltage to rise rapidly. Based on the charging voltage requirement of the pulse capacitor C, it is determined that opening the gate will turn off the thyristor G. s2 The time.

[0056] like Figures 3-6 As shown, the second embodiment of the present invention proposes a control method for an excitation compensation topology for adjusting the output current waveform in the later stage of pulse generator discharge. Based on an excitation compensation topology for adjusting the output current waveform in the later stage of pulse generator discharge according to the first embodiment, the method includes:

[0057] Step S1: Drive the pulse generator to its rated speed to store energy; charge the excitation capacitor to the required voltage.

[0058] In step S2, after the excitation module is triggered, the induced voltage generated by the armature winding of the pulse generator is rectified to produce a rectified voltage, such as... Figure 3 As shown, the rectified voltage passes through G s1 Discharge is applied to the excitation winding, and the current in the excitation winding rises accordingly, entering the self-excitation process. The current loop is shown by the red dashed line in the figure.

[0059] In step S3, as self-excitation proceeds, the rectified voltage gradually increases. When the rectified voltage meets the set threshold, the gate is closed to turn off the thyristor G. s1 Opening the gate can turn off the thyristor G. s2 Gate turn-off thyristor G s3 And n-1 gate-turn-off thyristors G, the rectified voltage discharges to the load, and at the same time charges n pulse capacitors through the compensation capacitor charging circuit, the current path is as follows Figure 4 As shown;

[0060] In step S4, after the charging voltage of the n pulse capacitors reaches a preset value, the gate is closed to turn off the thyristor G. s2 Gate turn-off thyristor G s3 Entering the discharge preparation stage, the excitation current flows through the freewheeling diode D. n For current flow path in the circuit, see [link / reference]. Figure 5 ;

[0061] Step S5, see Figure 6 After the discharge set time begins, the excitation current compensation stage begins. The n-1 gates are closed to turn off the thyristor G, and the n-1 discharge thyristors S are opened. At this time, the n-1 diodes D are turned off due to reverse voltage. The first n-1 pulse capacitors are connected end to end through the discharge thyristors S and then discharge to the load, thereby realizing the excitation current compensation.

[0062] Because the gate can turn off the thyristor Gs1 Gate turn-off thyristor G s2 Gate turn-off thyristor G s3 The existence of this allows for flexible switching of the charging circuit for the compensation capacitor. For example... Figure 7 As shown, opening the gate can turn off the thyristor G. s2 With n-1 gate-turn-off thyristors G, the rectified voltage only charges the compensation capacitor bank, while the current in the excitation winding freewheels through the freewheeling diode. The current flow path is shown by the red dashed line in the figure. Figure 8 As shown, opening the gate can turn off the thyristor G. s1 Gate turn-off thyristor G s2 In this case, the rectified voltage can simultaneously charge the compensation capacitor bank and discharge the excitation winding. This situation differs from step S3 described above. In this case, the excitation winding and the compensation capacitor bank are connected in parallel as the load of the rectified voltage. This operating mode is different from step S3, that is... Figure 4 The pattern shown demonstrates the flexibility in selecting the charging circuit proposed in this invention.

[0063] In the description of this invention, terms such as "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," which indicate direction or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings. These are used merely for ease of description and do not indicate or imply that the device or element must have a specific orientation, or be constructed and operated in a specific orientation; therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0064] Furthermore, it should be noted that, in the description of this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0065] The term "comprising" or any other similar term is intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus / device that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent in such process, method, article, or apparatus / device.

[0066] The technical solution of the present invention has been described above with reference to the preferred embodiments shown in the accompanying drawings. However, it will be readily understood by those skilled in the art that the scope of protection of the present invention is obviously not limited to these specific embodiments. Without departing from the principles of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will all fall within the scope of protection of the present invention.

Claims

1. An excitation compensation topology for regulating the output current waveform during the later stage of a pulse generator discharge, connected to a rectified voltage and a load, characterized in that, Including the compensation capacitor charging circuit and the gate turn-off thyristor G s1 Gate turn-off thyristor G s2 Gate turn-off thyristor G s3 and freewheeling diode D n The compensation capacitor charging circuit includes n pulse capacitors C, n-1 discharge thyristors S, n-1 gate turn-off thyristors G, and n-1 diodes D. n pulse capacitors C are connected in parallel. Except for the first pulse capacitor C, each of the other pulse capacitors C is equipped with a discharge thyristor S, a diode D and a gate turn-off thyristor G. The positive terminal of the first pulse capacitor C is connected to the first terminal of the rectified voltage, the negative terminal of the first pulse capacitor is connected to the first node Q1, and the first node Q1 is connected to the second terminal of the rectified voltage. A gate turn-off thyristor G is connected between the positive terminal of the pulse capacitor at the first end and the first terminal of the rectified voltage. S2 The gate turn-off thyristor G S2 The positive terminal and gate of the thyristor G can be turned off. S1 The positive terminal connection allows the gate to turn off the thyristor G. S1 The negative terminal is connected to the second node Q2, and the second node Q2 is connected to the gate turn-off thyristor G. S3 The negative terminal and freewheeling diode D n The negative terminal is connected to the first end of the load; The gate turn-off thyristor G S3 The positive terminal of the diode is connected to the positive terminal of the pulse capacitor C at the tail end, and the freewheeling diode D... n The positive terminal is connected to the third node Q3, and the third node Q3 is connected to the first node Q1 and the second end of the load; In this configuration, between two adjacent pulse capacitors, the positive terminal of the (n-1)th pulse capacitor is connected to the positive terminal of a diode, the negative terminal of the diode is connected to the positive terminal of the nth pulse capacitor, the negative terminal of the nth pulse capacitor is connected to the positive terminal of a gate turn-off thyristor, and the negative terminal of the gate turn-off thyristor is connected to the negative terminal of the (n-1)th pulse capacitor. Between two adjacent pulse capacitors, the positive terminal of the (n-1)th pulse capacitor is connected to the positive terminal of a discharge thyristor, and the negative terminal of the discharge thyristor is connected to the negative terminal of the nth pulse capacitor.

2. The excitation compensation topology for adjusting the output current waveform in the later stage of pulse generator discharge according to claim 1, characterized in that, The gate turn-off thyristor G S1 It is a bypass switch used to control the connection and disconnection time of the charging circuit of the compensation capacitor.

3. The excitation compensation topology for adjusting the output current waveform in the later stage of pulse generator discharge according to claim 1, characterized in that, The n-1 gate-turn-off thyristors G remain on during charging, directly connecting the negative terminals of each pulse capacitor C to provide a circuit for parallel charging of the pulse capacitors C, and remain off during series discharging.

4. The excitation compensation topology for adjusting the output current waveform in the later stage of pulse generator discharge according to claim 1, characterized in that, Diode D is used to withstand reverse voltage and turn off during series discharge, thereby cutting off the parallel charging circuit.

5. The excitation compensation topology for adjusting the output current waveform in the later stage of pulse generator discharge according to claim 1, characterized in that, n is a positive integer, and n≥2.

6. The excitation compensation topology for adjusting the output current waveform in the later stage of pulse generator discharge according to claim 1, characterized in that, The load is the excitation winding of a pulse generator.

7. The excitation compensation topology for adjusting the output current waveform in the later stage of pulse generator discharge according to claim 1, characterized in that, Initially, opening the gate can turn off the thyristor G. s1 Closing the gate can turn off the thyristor G. s2 and gate turn-off thyristor G s3 This causes the rectified voltage to rise rapidly. Based on the charging voltage requirement of the pulse capacitor C, it is determined that opening the gate will turn off the thyristor G. s2 The time.

8. The excitation compensation topology for adjusting the output current waveform in the later stage of pulse generator discharge according to claim 1, characterized in that, The rectified voltage is the armature voltage after rectification by the pulse generator.

9. A control method for an excitation compensation topology for adjusting the output current waveform in the later stage of a pulse generator discharge, based on the excitation compensation topology for adjusting the output current waveform in the later stage of a pulse generator discharge as described in any one of claims 1-8, characterized in that, The method includes: Step S1: Drive the pulse generator to its rated speed to store energy; charge the excitation capacitor to the required voltage. Step S2: After the excitation module is triggered, the induced voltage generated by the armature winding of the pulse generator is rectified to produce a rectified voltage. The rectified voltage is then passed through G... s1 Discharge is applied to the excitation winding, and the current in the excitation winding rises accordingly, entering the self-excitation process; In step S3, as self-excitation proceeds, the rectified voltage gradually increases. When the rectified voltage meets the set threshold, the gate is closed to turn off the thyristor G. s1 Opening the gate can turn off the thyristor G. s2 and gate turn-off thyristor G s3 And n-1 gate turn-off thyristors G, the rectified voltage discharges to the load, and at the same time charges n pulse capacitors through the compensation capacitor charging circuit. In step S4, after the charging voltage of the n pulse capacitors reaches a preset value, the gate is closed to turn off the thyristor G. s2 Gate turn-off thyristor G s3 Entering the discharge preparation stage, the excitation current flows through the freewheeling diode D. n Circulation; Step S5: After the discharge set time begins, the excitation current compensation stage begins. The n-1 gate turn-off thyristors G are closed, and the n-1 discharge thyristors S are opened. At this time, the n-1 diodes D are turned off due to reverse voltage. The first n-1 pulse capacitors are connected end to end through the discharge thyristors S and then discharge to the load, thereby achieving excitation current compensation.

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