Excitation compensation topology and control method for output current waveform adjustment in later discharge period of pulse generator

Abstract

The invention belongs to the technical field of energy storage motors and pulse power, particularly relates to an excitation compensation topology for output current waveform adjustment in the later period of discharge of a pulse generator and a control method thereof, and aims at solving the problems that a traditional excitation topology is only composed of a high-voltage capacitor and a thyristor, the topology is simple, and the cost is low. And the excitation current waveform adjusting capability is limited. The circuit comprises a compensation capacitor charging loop, a gate pole turn-off thyristor Gs1, a gate pole turn-off thyristor Gs2, a gate pole turn-off thyristor Gs3 and a fly-wheel diode Dn. The compensation capacitor charging loop comprises n pulse capacitors C, (n-1) discharge thyristors S, (n-1) gate pole turn-off thyristors G and (n-1) diodes D. According to the excitation compensation topology, through application of the high-power switch tube and the compensation capacitor bank, effective adjustment and rapid compensation of output current waveforms in the later discharge period of the pulse generator are achieved, and the flexibility and efficiency of the system are enhanced.

Description

Technical Field

[0001] The invention belongs to the technical field of energy storage motors and pulse power, and specifically relates to an excitation compensation topology for adjusting the output current waveform of a pulse generator in the late stage of discharge and a control method thereof. Background Art

[0002] Pulse power technology has been widely used in many fields such as plasma physics and controlled nuclear fusion research, nuclear explosion simulation, high-power laser and electromagnetic propulsion due to its short-term high-power characteristics. As a key part of pulse power technology, the status and importance of high-power pulse power supply in pulse power technology are clearly visible. The pursuit of higher power and energy storage density has always been the development trend of high-power pulse power supply. Capacitor energy storage has been widely used and studied in high-power pulse power supply due to its simple structure and high power density, and it is the most mature form of development. However, the low energy storage density has always been an obstacle to its further development. If the power supply capacity is to be increased, the volume and weight must be increased, which obviously limits the portability and flexibility of the system. In order to overcome this obstacle, energy storage forms with higher energy storage density have been explored.

[0003] The pulse generator stores energy through the high-speed rotation of the large inertia flywheel rotor. It has the advantages of long energy storage time, high energy storage density, high power density and compact structure. It is an ideal energy storage carrier for high pulse power supply. After years of development, the pulse generator has gradually evolved into a transitional and hollow-core structure. In essence, the pulse generator is a hollow-core structure electrically excited synchronous generator. Regardless of whether it works in pulse excitation mode or self-excitation mode, it needs to use external capacitors to build a working magnetic field for the pulse generator. The design of the hollow-core structure requires a large excitation current to establish excitation, so the pulse generator usually adopts the self-excitation mode. In the self-excitation mode, a relatively low-voltage capacitor monomer is used to provide the excitation current for the pulse generator excitation winding. The excitation current of the pulse generator is directly related to its output current waveform. Adjusting the excitation current waveform can directly adjust the output current waveform of the pulse generator. However, the traditional excitation topology is only composed of high-voltage capacitors and thyristors, the topology is relatively simple, and the excitation current waveform adjustment ability is limited.

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

[0005] In order to solve the above problems in the prior art, namely, the traditional excitation topology is only composed of high-voltage capacitors and thyristors, the topology is relatively simple, and the excitation current waveform adjustment capability is limited, the present invention provides an excitation compensation topology for adjusting the output current waveform of a pulse generator in the late discharge stage and a control method thereof.

[0006] The first aspect of the present invention provides an excitation compensation topology for adjusting the output current waveform of a pulse generator in the late stage of 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;

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

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

[0009] The gate can turn off the thyristor G S3 The positive electrode of the pulse capacitor C is connected to the positive electrode of the tail end, and the freewheeling diode D n The positive electrode of is connected to a 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 electrode of the n-1th pulse capacitor is connected to the positive electrode of a diode, the negative electrode of the diode is connected to the positive electrode of the n-th pulse capacitor, the negative electrode of the n-th pulse capacitor is connected to the positive electrode of a gate turn-off thyristor, and the negative electrode of the gate turn-off thyristor is connected to the negative electrode of the n-1th pulse capacitor;

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

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

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

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

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

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

[0017] In some preferred embodiments, the gate can be turned off by initially opening the thyristor G S1 , closing the gate can turn off the thyristor G s2 and gate turn-off thyristor G s3 , so that the rectifier voltage rises rapidly, according to the charging voltage requirement of the pulse capacitor C, it is determined that the gate can turn off the thyristor G s2 time.

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

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

[0020] Step S1, drag the pulse generator to the rated speed to store energy; charge the excitation capacitor to the required voltage;

[0021] Step S2: After the excitation module is triggered, the armature winding of the pulse generator generates an induced voltage which is rectified to generate a rectified voltage. The rectified voltage passes through the G s1 Discharge to the excitation winding, and the current of the excitation winding rises and enters the self-excitation process;

[0022] Step S3: As the 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 is discharged to the load, and at the same time, the n pulse capacitors are charged through the compensation capacitor charging circuit;

[0023] 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 , enters the discharge preparation stage, the excitation current passes through the freewheeling diode D n Circulation;

[0024] Step S5, after the discharge setting time starts, the excitation current compensation stage is entered, 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 subjected to reverse voltage and turned off, and the first n-1 pulse capacitors are connected end to end through the discharge thyristors S in sequence and then discharged to the load, thereby realizing excitation current compensation.

[0025] Beneficial effects of the present invention:

[0026] The present invention proposes an excitation compensation topology for adjusting the output current waveform of a pulse generator in the later stage of discharge, which can be used for rapid compensation of the excitation current in the later stage of discharge of the pulse generator, and further compensate for the attenuation of the output current waveform in the later stage of discharge of the pulse generator. The topology structure realizes parallel charging and series discharge of the compensation capacitor group through a high-power switch tube, which is beneficial to reducing the system withstand voltage level and realizing rapid charging of the compensation capacitor group; the introduction of the compensation capacitor group in the excitation circuit increases the control dimension of the pulse generator excitation circuit and improves the flexibility of the pulse generator waveform regulation; the charging and discharging time and current circuit control can be realized through the high-power thyristor, and the armature rectifier voltage of the pulse generator can be flexibly switched to discharge directly to the load, charge the compensation capacitor group, and charge the compensation capacitor group while discharging to the excitation winding circuit. Through reasonable switching, the influence of the compensation capacitor group on the self-excitation process can be minimized. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0028] Figure 1 It is the overall equivalent circuit diagram of the pulse generator pulse power supply system involved in the present invention;

[0029] Figure 2 It is a structural schematic diagram of an excitation compensation topology for adjusting the output current waveform of a pulse generator in the late stage of discharge according to the present invention;

[0030] Figure 3 It is a first working schematic diagram of an excitation compensation topology for adjusting the output current waveform of a pulse generator in the late stage of discharge according to the present invention;

[0031] Figure 4 It is a second working schematic diagram of an excitation compensation topology for adjusting the output current waveform of a pulse generator in the late stage of discharge according to the present invention;

[0032] Figure 5 It is a third working schematic diagram of an excitation compensation topology for adjusting the output current waveform of a pulse generator in the late stage of discharge of the present invention;

[0033] Figure 6 It is a fourth working schematic diagram of an excitation compensation topology for adjusting the output current waveform of a pulse generator in the late stage of discharge of the present invention;

[0034] Figure 7 It is a fifth working schematic diagram of an excitation compensation topology for adjusting the output current waveform of a pulse generator in the late stage of discharge of the present invention;

[0035] Figure 8 It is the sixth working schematic diagram of an excitation compensation topology for adjusting the output current waveform of a pulse generator in the late stage of discharge of the present invention. DETAILED DESCRIPTION

[0036] The present application will be further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the relevant invention, rather than to limit the invention. It is also necessary to explain that, for ease of description, only the parts related to the relevant invention are shown in the accompanying drawings.

[0037] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0038] The present invention is an excitation compensation topology structure for adjusting the output current waveform in the late stage of pulse generator discharge, which has obvious advantages in the field of millisecond flat-top wave pulse current output. The topology structure realizes parallel charging and series discharge of compensation capacitor groups through high-power switching tubes, which is conducive to reducing the system withstand voltage level and realizing rapid charging of compensation capacitor groups; the introduction of compensation capacitor groups in the excitation circuit increases the control dimension of the pulse generator excitation circuit and improves the flexibility of pulse generator waveform regulation; the charging and discharging time and current circuit control can be realized through high-power thyristors, minimizing the influence of compensation capacitor groups on the self-excitation process.

[0039] See also Figure 1 and Figure 2 The first embodiment of the present invention provides an excitation compensation topology for adjusting the output current waveform of a pulse generator in the late stage of 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 with each other. Except for the pulse capacitor C at the head end, each of the remaining pulse capacitors C is equipped with a discharge thyristor S, a diode D and a gate turn-off thyristor G; the positive electrode of the pulse capacitor at the head end is connected to the first end of the rectified voltage, the negative electrode of the pulse capacitor at the head end is connected to the first node Q1, and the first node Q1 is connected to the second end of the rectified voltage;

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

[0042] The gate can turn off the thyristor G S3 The positive electrode of the pulse capacitor C is connected to the positive electrode of the tail end, and the freewheeling diode D n The positive electrode of is connected to a 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 the pulse generator. The rectified voltage is the armature voltage after rectification of 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 the present invention. Except for the excitation compensation topology shown in ⑦, the remaining structures are all prior art, and the present invention does not elaborate on their structures.

[0044] Wherein, a gate turn-off thyristor G is connected between the positive electrode of the pulse capacitor at the first end and the first end of the rectified voltage. S2 , specifically:

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

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

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

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

[0049] Among them, the present invention adopts a parallel charging and series discharging method, which is beneficial to reducing the system voltage resistance level and shortening the charging time during charging; during discharging, each pulse capacitor is connected end to end through a thyristor to increase the discharge voltage, increase the rising rate of the excitation current, and realize rapid compensation of the excitation current.

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

[0051] Specifically, the gate turns off the thyristor G S2 Control when to discharge the compensation capacitor bank, the gate can turn off the thyristor G S3 Controls when the compensation capacitor bank discharges into the field winding.

[0052] The n-1 gate turn-off thyristors G are kept turned on during charging, so that the negative electrodes of the pulse capacitors are directly connected to provide a circuit for parallel charging of the pulse capacitors. They are kept turned off during series discharge to prevent the pulse capacitors from being short-circuited due to the conduction of the series discharge thyristors.

[0053] The diode D is used to withstand the reverse voltage and shut down during the series discharge process, 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 of the pulse generator.

[0055] The present invention shortens the self-excitation time of the system and realizes the rapid charging of the compensation capacitor bank. At the initial moment, 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 , so that the rectifier voltage rises rapidly, according to the charging voltage requirement of the pulse capacitor C, it is determined that the gate can turn off the thyristor G s2 time.

[0056] like Figure 3-Figure 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 of a pulse generator in the late stage of discharge, based on the excitation compensation topology for adjusting the output current waveform of a pulse generator in the late stage of discharge of the first embodiment, the method comprises:

[0057] Step S1, drag the pulse generator to the rated speed to store energy; charge the excitation capacitor to the required voltage;

[0058] Step S2: After the excitation module is triggered, the armature winding of the pulse generator generates an induced voltage which is rectified to generate a rectified voltage. Figure 3 As shown, the rectified voltage passes through G s1 Discharge to the excitation winding, and the current of the excitation winding will rise and enter the self-excitation process. The current loop is shown by the red dotted line in the figure;

[0059] Step S3: As the 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 the n pulse capacitors through the compensation capacitor charging circuit. The current path is as follows Figure 4 As shown;

[0060] 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 , enters the discharge preparation stage, the excitation current passes through the freewheeling diode D n Flow, the current flow path in the circuit is shown Figure 5 ;

[0061] Step S5, see Figure 6 , after the discharge setting time, it enters the excitation current compensation stage, closing the n-1 gates to turn off the thyristor G, and opening the n-1 discharge thyristor S. At this time, the n-1 diodes D are subjected to the reverse voltage and turned off, and the first n-1 pulse capacitors are connected end to end through the discharge thyristor S in sequence and then discharged to the load, thereby realizing the excitation current compensation.

[0062] Since the gate can turn off the thyristor Gs1 , Gate Turn-Off Thyristor G s2 , Gate Turn-Off Thyristor G s3 The existence of the compensation capacitor charging circuit can be flexibly switched. Figure 7 As shown, opening the gate can turn off the thyristor G s2 When there are n-1 gate-turn-off thyristors G, the rectifier voltage only charges the compensation capacitor bank, and the current in the field winding is freewheeled through the freewheeling diode. The current flow path is shown by the red dotted 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 be charged to the compensation capacitor bank and discharged to the excitation winding at the same time. This situation is different from the above-mentioned step S3. At this time, the excitation winding and the compensation capacitor bank are connected in parallel as the load of the rectified voltage. This working mode is different from step S3, that is, Figure 4 This shows the flexibility of the charging circuit selection proposed by the present invention.

[0063] In the description of the present invention, the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicating directions or positional relationships are based on the directions or positional relationships shown in the drawings, which are only for the convenience of description, and do not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0064] In addition, it should be noted that in the description of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

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

[0066] So far, the technical solutions of the present invention have been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it is easy for those skilled in the art to understand that the protection scope of the present invention is obviously not limited to these specific embodiments. Without departing from the principle 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 fall within the protection scope of the present invention.

Claims

1. An excitation compensation topology for adjusting the output current waveform of a pulse generator in the later stage of discharge, connected to a rectified voltage and a load, characterized in that: Including compensation capacitor charging circuit, 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 with each other. Except for the pulse capacitor C at the head end, 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 electrode of the pulse capacitor C at the head end is connected to the first end of the rectified voltage, the negative electrode of the pulse capacitor at the head end is connected to the first node Q1, and the first node Q1 is connected to the second end of the rectified voltage; A gate turn-off thyristor G is connected between the positive electrode of the pulse capacitor at the first end and the first end of the rectified voltage. S2 , the gate can turn off the thyristor G S2 The positive electrode and gate of the thyristor G S1 The positive electrode of the thyristor G is connected to the gate. S1 The negative electrode of the gate turn-off thyristor G is connected to the second node Q2. S3 The negative pole, freewheeling diode D n The negative electrode is connected to the first end of the load; The gate can turn off the thyristor G S3 The positive electrode of the pulse capacitor C is connected to the positive electrode of the tail end, and the freewheeling diode D n The positive electrode of is connected to a third node Q3, and the third node Q3 is connected to the first node Q1 and the second end of the load.

2. According to claim 1, an excitation compensation topology for adjusting the output current waveform of a pulse generator in the late stage of discharge, characterized in that: Between two adjacent pulse capacitors, the positive electrode of the n-1th pulse capacitor is connected to the positive electrode of a diode, the negative electrode of the diode is connected to the positive electrode of the nth pulse capacitor, the negative electrode of the nth pulse capacitor is connected to the positive electrode of a gate turn-off thyristor, and the negative electrode of the gate turn-off thyristor is connected to the negative electrode of the n-1th pulse capacitor; Between two adjacent pulse capacitors, the positive electrode of the n-1th pulse capacitor is connected to the positive electrode of a discharge thyristor, and the negative electrode of the discharge thyristor is connected to the negative electrode of the nth pulse capacitor.

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

4. The excitation compensation topology for adjusting the output current waveform of a pulse generator in the late stage of discharge according to claim 1 is characterized in that: The n-1 gate turn-off thyristors G are kept turned on at the charging time, so that the negative electrodes of the pulse capacitors C are directly connected to provide a circuit for parallel charging of the pulse capacitors C, and are kept turned off at the series discharge time.

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

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

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

8. The excitation compensation topology for adjusting the output current waveform of a pulse generator in the late stage of discharge according to claim 1 is characterized in that: At the initial moment, the gate is opened to turn off the thyristor G. s1 , closing the gate can turn off the thyristor G s2 and gate turn-off thyristor G s3 , so that the rectifier voltage rises rapidly, according to the charging voltage requirement of the pulse capacitor C, it is determined that the gate can turn off the thyristor G s2 time.

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

10. A control method for an excitation compensation topology for adjusting the output current waveform of a pulse generator in the later stage of discharge, based on an excitation compensation topology for adjusting the output current waveform of a pulse generator in the later stage of discharge according to any one of claims 1 to 9, characterized in that: The method includes: Step S1, drag the pulse generator to the rated speed to store energy; charge the excitation capacitor to the required voltage; Step S2: After the excitation module is triggered, the armature winding of the pulse generator generates an induced voltage which is rectified to generate a rectified voltage. The rectified voltage is then passed through the G s1 Discharge to the excitation winding, and the current of the excitation winding rises and enters the self-excitation process; Step S3: As the 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 is discharged to the load, and at the same time, the n pulse capacitors are charged through the compensation capacitor charging circuit; 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 , enters the discharge preparation stage, the excitation current passes through the freewheeling diode D n Circulation; Step S5, after the discharge setting time starts, the excitation current compensation stage is entered, 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 subjected to reverse voltage and turned off, and the first n-1 pulse capacitors are connected end to end through the discharge thyristors S in sequence and then discharged to the load, thereby realizing excitation current compensation.

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