A switching power supply and thyristor assembly

Abstract

The disclosure provides a switching power supply, a thyristor assembly, a linear modulator and an electron linear accelerator. The switching power supply comprises: a pulse generation circuit configured to generate a pulse input current; a transformer circuit connected between the pulse generation circuit and a rectification and voltage stabilization circuit, and configured to couple the pulse input current generated by the pulse generation circuit; the transformer circuit comprises a plurality of transformer branches, and the plurality of transformer branches are capable of outputting different pulse output currents; and the rectification and voltage stabilization circuit is connected between the transformer circuit and a load. The rectification and voltage stabilization circuit comprises a plurality of rectification and voltage stabilization branches, the plurality of rectification and voltage stabilization branches are connected with the plurality of transformer branches in correspondence, and the rectification and voltage stabilization branches are configured to output a plurality of different pulse currents after rectification and voltage stabilization of outputs of the plurality of transformer branches, so as to provide the plurality of different pulse currents to the load at different potentials. Thus, the disclosure can supply power to the load at different potentials by arranging the plurality of transformer branches in the transformer circuit.

Description

Technical Field

[0001] This disclosure relates to the field of pulse technology, and in particular to a switching power supply and a thyristor switch assembly. Background Technology

[0002] High-power linear modulators are a crucial component of radiation-grade electron linear accelerators. They generate high-power pulses by discharging artificial lines using high-voltage, high-current discharge switches. Previously, the only discharge switch capable of handling such applications was the hydrogen thyratron, a type of vacuum electronic device with drawbacks such as high power consumption and short lifespan. Semiconductor devices, on the other hand, have no lifespan limitations, and there has long been a desire to replace vacuum electronic devices in high-voltage, high-current applications with semiconductor devices. However, compared to vacuum electronic devices, semiconductor devices have lower voltage withstand capabilities, are more prone to damage, and can handle lower currents. Summary of the Invention

[0003] This disclosure provides a switching power supply, a thyristor switching assembly, a linear modulator, and an electron linear accelerator to at least solve the above-mentioned technical problems existing in the prior art.

[0004] According to a first aspect of this disclosure, a switching power supply is provided, the switching power supply comprising: a pulse generating circuit for generating a pulse input current; a transformer circuit connected between the pulse generating circuit and a rectifier-regulator circuit for coupling the pulse input current generated by the pulse generating circuit; the transformer circuit including a plurality of transformer branches capable of outputting different pulse output currents; and a rectifier-regulator circuit connected between the transformer circuit and a load; the rectifier-regulator circuit including a plurality of rectifier-regulator branches corresponding to the plurality of transformer branches, for outputting a plurality of different pulse currents after rectifying and regulating the outputs of the plurality of transformer branches, so as to provide the plurality of different pulse currents to loads at different potentials.

[0005] In one embodiment, the rectifier-regulated branch includes: a rectifier unit connected between the transformer branch and the regulated unit, used to rectify and filter the output of the transformer branch; the regulated unit connected between the rectifier unit and the load, used to regulate the output of the rectifier unit and then provide it to the load; and a rectifier control unit used to control the conduction or cutoff of the rectifier-regulated branch according to the output of the rectifier unit.

[0006] In one embodiment, the rectifier control unit includes a voltage monitoring unit and a switch; the voltage monitoring unit is connected between the rectifier unit and the voltage regulator unit, and is used to monitor the output of the rectifier unit and control the switching on and off according to the output of the rectifier unit, so as to control the conduction or shutdown of the rectifier-regulator branch.

[0007] In one embodiment, the voltage monitoring unit includes: a judgment module for judging whether the output of the rectifier unit is higher than a voltage threshold; a control module for controlling the switch to close when the voltage is greater than or equal to the voltage threshold, so as to short-circuit the corresponding rectifier and voltage regulator branch; and controlling the switch to open when the voltage is less than the voltage threshold, so as to turn on the corresponding rectifier and voltage regulator branch.

[0008] According to a second aspect of this disclosure, a thyristor switch assembly is provided, the thyristor switch assembly comprising: a switching power supply for supplying power to an IGBT module; the IGBT module being connected between the switching power supply and a monitoring and control module for outputting pulses; the IGBT module comprising a plurality of IGBT units; the monitoring and control module being connected between a main control module of a linear modulator to which the thyristor switch assembly belongs and the IGBT module, for transmitting a trigger signal from the main control module to the IGBT units, and for monitoring the state of the IGBT units and feeding back to the main control module; wherein the main control module is used to control the thyristor switch assembly.

[0009] In one embodiment, the IGBT unit includes: an IGBT driving circuit connected between the monitoring and control module and the IGBT parallel circuit, for receiving the trigger signal and driving the IGBT parallel circuit; an IGBT parallel circuit connected to a voltage equalization circuit, including multiple IGBTs; a voltage equalization circuit connected to the switching power supply, for equalizing the voltage of the IGBT unit; a first protection circuit connected to the IGBT driving circuit, for protecting the IGBTs by controlling the IGBT driving circuit; and a second protection circuit connected to the IGBT parallel circuit, for protecting the IGBTs by controlling the multiple IGBTs.

[0010] In one possible implementation, the first protection circuit is a fast protection circuit, comprising: an IGBT control module, configured to apply a voltage to the gate of the IGBT when the control and monitoring unit detects that the voltage of the IGBT unit exceeds the IGBT breakdown voltage, so that multiple IGBTs are simultaneously in an amplification state.

[0011] In one embodiment, the second protection circuit is a slow protection circuit, comprising: an IGBT drive control module, used to control the IGBT drive circuit to turn on the IGBT when the control and monitoring circuit detects that the voltage of the IGBT unit exceeds the IGBT breakdown voltage.

[0012] According to a third aspect of this disclosure, a linear modulator is provided, the linear modulator including the above-described thyristor switch assembly.

[0013] According to a fourth aspect of this disclosure, an electron linear accelerator is provided, the electron linear accelerator including the linear modulator described above.

[0014] This disclosure provides a switching power supply, a thyristor switch assembly, a linear modulator, and an electronic linear accelerator. By setting multiple transformer branches in the transformer circuit of the switching power supply and correspondingly setting multiple rectifier and voltage regulator branches in the rectifier and voltage regulator circuit, the transformer branches of the switching power supply can output different currents according to the load, and provide charging to the loads at different potentials after passing through the corresponding rectifier and voltage regulator branches.

[0015] It should be understood that the description in this section is not intended to identify key or essential features of the embodiments of this disclosure, nor is it intended to limit the scope of this disclosure. Other features of this disclosure will become readily apparent from the following description. Attached Figure Description

[0016] The above and other objects, features, and advantages of this disclosure will become readily apparent from the following detailed description of exemplary embodiments, taken in conjunction with the accompanying drawings. Several embodiments of this disclosure are illustrated in the drawings by way of example and not limitation, in which:

[0017] In the accompanying drawings, the same or corresponding reference numerals indicate the same or corresponding parts.

[0018] Figure 1 A general principle block diagram of the switching power supply according to an embodiment of the present disclosure is shown;

[0019] Figure 2 A schematic block diagram of the rectification and voltage regulation branch of the switching power supply according to an embodiment of the present disclosure is shown;

[0020] Figure 3 A general principle block diagram of a thyristor switch assembly according to an embodiment of the present disclosure is shown;

[0021] Figure 4 A schematic block diagram of the IGBT unit of the thyristor switch assembly according to an embodiment of the present disclosure is shown. Detailed Implementation

[0022] To make the objectives, features, and advantages of this disclosure more apparent and understandable, the technical solutions in the embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this disclosure, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this disclosure without creative effort are within the scope of protection of this disclosure.

[0023] The technical solution of this disclosure will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0024] Figure 1 A general principle block diagram of a switching power supply according to an embodiment of the present disclosure is shown.

[0025] The block diagram of the switching power supply in this disclosure can be as follows: Figure 1 As shown, the switching power supply 10 may include: a pulse generating circuit 11 for generating pulse current; a transformer circuit 12 connected between the pulse generating circuit and the rectifier-regulator circuit 13 for coupling the current output by the pulse generating circuit 11, which includes multiple transformer branches 121, each capable of outputting different pulse output currents; and a rectifier-regulator circuit 13 connected between the transformer circuit 12 and the load for rectifying and regulating the output of the transformer circuit 12. The rectifier-regulator circuit 13 includes multiple rectifier-regulator branches 131, which are correspondingly connected to the multiple transformer branches 121, for outputting multiple different pulse currents after rectifying and regulating the outputs of the multiple transformer branches 121, so as to provide multiple different pulse currents to loads at different potentials.

[0026] Specifically, the multiple transformer branches 121 can be multiple magnetic ring converters. Since the number of secondary coils in each magnetic ring converter is different, different magnetic ring converters can couple the pulse current after the pulse generation circuit 11 outputs current, generating different pulse currents. The multiple rectifier and voltage regulator branches 131 rectify and regulate the different pulse currents output from the multiple transformer branches 121, supplying power to loads at different potentials. Any general-purpose rectifier and voltage regulator unit can be used, and this disclosure does not impose any specific limitations on this.

[0027] In one embodiment of this disclosure, the pulse generating circuit 11 and the transformer circuit 12 are connected by a high-voltage cable 14, the withstand voltage of which can be selected according to actual needs. The high-voltage cable 14 can ensure that the pulse generating circuit 11 and the transformer circuit 12 can withstand the high voltage required by the actual needs.

[0028] In this way, multiple magnetic ring converters can be connected in series through the high-voltage cable 14. During the process of these magnetic ring converters coupling to the output pulse current of the pulse generation circuit 11, the multiple magnetic ring converters do not affect each other.

[0029] In one embodiment of this disclosure, the pulse generating circuit 11 may include a pulse generator 111 and an energy storage element 112. It should be noted that this is a preferred embodiment of this disclosure, and this disclosure does not specifically limit the pulse generating circuit 11. Pulse generating circuits 11 with the same function are all within the protection scope of this disclosure.

[0030] In one embodiment of this disclosure, the energy storage element 112 can be an energy storage inductor. When the pulse signal output by the pulse generator 111 is at a high level, the energy storage inductor magnetizes itself using the acquired pulse voltage. When the pulse signal output by the pulse generator 111 is at a low level, the magnetic energy in the energy storage inductor discharges through the high-voltage cable 14.

[0031] Figure 2 A block diagram illustrating the principle of the rectification and regulation branch of the switching power supply according to an embodiment of the present disclosure is shown.

[0032] In one embodiment of this disclosure, the rectification and voltage regulation branch 131 may include: a rectification unit 1311 connected between the transformer branch 121 and the voltage regulation unit 1312, for rectifying and filtering the output of the transformer branch 121; a voltage regulation unit 1312 connected between the rectification unit 1311 and the load, for regulating the output of the rectification unit 1311 and then providing it to the load; and a rectification control unit 1313 for controlling the conduction or cutoff of the rectification and voltage regulation branch 131 according to the output of the rectification unit 1311.

[0033] Specifically, the transformer branch 121 couples the pulse current output by the pulse generator circuit 11 and provides it to the rectifier unit 1311. The rectifier unit 1311 rectifies and filters the coupled pulse current and provides it to the voltage regulator unit 1312. The voltage regulator unit 1312 regulates the rectified and filtered pulse current and transmits it to the load to supply power to the corresponding load.

[0034] In one embodiment of this disclosure, the rectifier control unit 1313 includes a voltage monitoring unit 13131 and a switch 13132. The voltage monitoring unit 13131 is connected between the rectifier unit 1311 and the voltage regulator unit 1312, and is used to monitor the output of the rectifier unit 1311 and control the switching on / off of the switch 1312 based on the output of the rectifier unit 1311, thereby controlling the conduction or shutdown of the rectifier-regulated branch 131.

[0035] In one embodiment of this disclosure, the voltage monitoring unit 13131 includes: a judgment module for judging whether the output of the rectifier unit 1311 is higher than a voltage threshold; a control module for controlling the switch 13132 to close when the voltage is greater than or equal to the voltage threshold, so as to short-circuit the corresponding rectifier and voltage regulator branch 131; and controlling the switch 13132 to open when the voltage is less than the voltage threshold, so as to turn on the corresponding rectifier and voltage regulator branch 131.

[0036] Specifically, because the primary and secondary windings of the magnetic ring converter in the transformer circuit are current-coupled, the output voltage of the rectifier unit 1311 is related to the load size. When the load is small, the voltage increases; when the load is large, the voltage decreases. After the rectifier unit 1311 rectifies and filters the output of the transformer branch 121, the voltage monitoring unit 13131 in the rectifier and voltage regulation control unit 1313 compares the output voltage of the rectifier unit 1311. If the voltage of the rectifier unit 1311 is greater than or equal to the voltage threshold, the voltage monitoring unit 13131 closes via the control switch 13132, short-circuiting the corresponding rectifier and voltage regulation branch 131 to prevent the output voltage of the rectifier unit 1311 from increasing further, allowing the voltage regulation circuit to continue operating. If the voltage of the rectifier unit 1311 is greater than or equal to the voltage threshold, the voltage monitoring unit 13131 closes via the control switch 13132, turning on the corresponding rectifier and voltage regulation branch 131, allowing the output voltage of the rectifier unit 1311 to continue increasing and continue supplying power to the load. In this way, the voltage monitoring unit 13131 monitors the voltage output of the rectifier unit 1311, keeping it within the normal voltage range, thus preventing the output voltage of the rectifier unit 1311 from being too high or too low and affecting the voltage regulator unit 1312, and ensuring the normal operation of the voltage regulator unit 1312.

[0037] Figure 3 A general principle block diagram of a thyristor switch assembly according to an embodiment of the present disclosure is shown.

[0038] The principle block diagram of the thyristor switch assembly of this disclosure can be referred to. Figure 3 It may include: a switching power supply for powering the IGBT module 21; the IGBT module 21, connected between the switching power supply and the monitoring and control module 22, for outputting pulses, including multiple IGBT units 211; the monitoring and control module 22, connected between the main control module of the linear modulator to which the thyristor switch assembly belongs and the IGBT module 21, for receiving the trigger signal from the main control module and simultaneously sending the trigger signal to each IGBT unit 211 synchronously; it is also used to receive the status information of each IGBT unit 211 and send it to the main control module so that the main control module can monitor and control the thyristor switch assembly.

[0039] Specifically, the switching power supply provides power to the IGBT module 21, and the main control unit sends a trigger signal to the monitoring and control module 22. The monitoring and control module 22 then transmits the trigger signal to the IGBT module 21 so that the IGBT module 21 can be turned on and put into operation.

[0040] In one embodiment of this disclosure, low-voltage IGBT units 211 are connected in series via connectors to form an IGBT module 21, thereby achieving high voltage withstand capability. In another embodiment, the IGBT module 21 is connected to a monitoring and control module 22 via an optical fiber pair. This optical fiber pair consists of two optical fibers: one for transmitting status signals of the IGBT units 211 to the monitoring and control module 22; and the other for transmitting trigger signals from the monitoring and control module 22 to the IGBT units 211.

[0041] Figure 4 A schematic block diagram of the IGBT unit of the thyristor switch assembly according to an embodiment of the present disclosure is shown.

[0042] refer to Figure 4 In one embodiment of this disclosure, the IGBT unit 211 may include: an IGBT driving circuit 2111 connected between the monitoring and control module 22 and the IGBT parallel circuit 2112, used to receive trigger signals and drive the IGBT parallel circuit 2112; the IGBT parallel circuit 2112 connected to the voltage equalization circuit 2113, including multiple IGBTs; the voltage equalization circuit 2113 connected to the switching power supply, used to equalize the voltage of the IGBT unit 211; a first protection circuit 2115 connected to the IGBT driving circuit 2111, used to protect the IGBTs by controlling the IGBT driving circuit 2111; and a second protection circuit connected to the IGBT parallel circuit 2112, used to protect the IGBTs by controlling the multiple IGBTs in the IGBT parallel circuit 2112.

[0043] Specifically, the monitoring and control module 22 transmits a trigger signal to the IGBT drive circuit 2111, and the IGBT drive circuit 2111 drives the IGBT parallel circuit 2112 to turn on.

[0044] In one embodiment of this disclosure, since each IGBT unit 211 is connected in series, when a high voltage is applied across the IGBT module 21, if the equivalent resistance of each IGBT unit 211 is inconsistent, it will cause the voltage on each IGBT unit 211 to be inconsistent. At this time, the voltage equalization circuit is used to reduce this voltage inconsistency.

[0045] In one embodiment of this disclosure, when the monitoring and control module 22 detects that the voltage of the IGBT unit exceeds the breakdown voltage of the IGBT in the IGBT parallel circuit 2112, the first protection circuit and the second protection circuit are simultaneously triggered to protect the IGBT. The breakdown voltage is the maximum forward voltage that the IGBT can withstand when it is turned off.

[0046] In one embodiment of this disclosure, the first protection circuit can achieve rapid protection of the IGBT unit. Specifically, the first protection circuit may include an IGBT control module. When the monitoring and control module 22 detects that the voltage across the IGBT unit 211 exceeds the IGBT's breakdown voltage, the IGBT control module simultaneously applies voltage to the gates of multiple IGBTs, causing multiple IGBTs to be in amplification mode simultaneously. This allows multiple IGBTs to share the high voltage and strong current, preventing damage to a single IGBT from being subjected to high voltage and strong current. This first protection circuit can rapidly apply voltage to the gates of multiple IGBTs when the monitoring and control module 22 detects that the voltage across the IGBT unit 211 exceeds the IGBT's breakdown voltage, causing multiple IGBTs to be in amplification mode simultaneously. The response time is only on the nanosecond level, enabling rapid protection of the IGBTs and preventing them from being broken down by high voltage.

[0047] In one embodiment of this disclosure, the second protection circuit can implement slow protection for the IGBT unit. Specifically, the second protection circuit may include an IGBT drive control module, which, when the monitoring and control module 22 detects that the voltage across the IGBT unit 211 exceeds the IGBT breakdown voltage, controls the IGBT drive circuit 2111 to turn on the IGBT, thereby protecting the IGBT. This second protection circuit can respond quickly, with a response time of tens of nanoseconds, when the monitoring and control module 22 detects that the voltage across the IGBT unit 211 exceeds the IGBT breakdown voltage. This allows for further protection of the IGBT by controlling it to turn on after the fast protection circuit has controlled the IGBT to be in an amplification state.

[0048] Specifically, when an IGBT unit 211 receives a trigger signal from the monitoring and control module 22, the IGBT in the IGBT unit 211 fails to turn on in time, and the voltage will continue to rise. When the monitoring and control module 22 detects that the voltage of the IGBT unit 211 exceeds the IGBT breakdown voltage, the fast protection circuit and the slow protection circuit are triggered simultaneously. At this time, the fast protection circuit is triggered, controlling all the IGBTs in the parallel circuit 2112 of the IGBTs in the IGBT unit 211 to be in the amplification state at the same time to share the voltage and current until the slow protection circuit controls the non-conducting IGBTs to turn on, and the IGBT unit 211 can work normally. The slow protection circuit and the fast protection circuit stop their corresponding operations.

[0049] In one embodiment of this disclosure, the monitoring and control module 22 can be connected to the IGBT drive circuit 2111 via the interface circuit 2116. The interface circuit 2116 first receives a trigger signal from the monitoring and control module 22 and then sends the received trigger signal to the IGBT drive circuit 2111; secondly, it sends the status of the IGBT unit 211 to the monitoring and control module 22. It should be noted that this is a preferred embodiment of this disclosure. This disclosure does not specifically limit the connection method between the monitoring and control module 22 and the IGBT drive module 2111; connection methods with the same function are all within the protection scope of this disclosure.

[0050] Thus, the switching power supply, thyristor switch assembly, linear modulator, and electron linear accelerator provided in this disclosure, by setting multiple transformer branches in the switching power supply and coupling the current output from the pulse generation circuit through current coupling, can generate different currents to provide to loads at different potentials. Furthermore, the thyristor switch assembly in this disclosure connects discrete, low-voltage, low-current, and reliable IGBTs in series and parallel, solving the problems of voltage equalization, current equalization, synchronization, and interference prevention, achieving a significant reduction in cost and a semi-permanent lifespan.

[0051] Furthermore, based on the thyristor switch assembly provided in the embodiments disclosed above, this disclosure also provides a linear modulator, which includes the aforementioned thyristor switch assembly.

[0052] Furthermore, based on the thyristor assembly provided in the embodiments disclosed above, this disclosure also provides an electronic linear accelerator, which includes the aforementioned linear modulator.

[0053] It should be noted here that the above description of the embodiments for linear modulators and electron linear accelerators is consistent with the foregoing... Figures 1 to 4 The description of the switching power supply and thyristor assembly embodiments shown is similar and has the same characteristics as described above. Figures 1 to 4 The beneficial effects of the switching power supply and thyristor assembly embodiments shown are similar and will not be described in detail here. For technical details not disclosed in the linear modulator and electron linear accelerator embodiments of the present invention, please refer to the foregoing description of the present invention. Figures 1 to 4 The embodiments of the switching power supply and thyristor assembly shown are for illustrative purposes only and will not be repeated here for brevity.

[0054] It should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this disclosure, "a plurality of" means two or more, unless otherwise explicitly specified.

[0055] The above description is merely a specific embodiment of this disclosure, but the scope of protection of this disclosure is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this disclosure should be included within the scope of protection of this disclosure. Therefore, the scope of protection of this disclosure should be determined by the scope of the claims.

Claims

1. A thyristor switch assembly, characterized in that, The thyristor switch assembly includes: Switching power supply, the switching power supply comprising: A pulse generator circuit is used to generate pulsed input current; A transformer circuit, connected between the pulse generating circuit and the rectifier and voltage regulator circuit, is used to couple the pulse input current generated by the pulse generating circuit. The transformer circuit includes multiple independent magnetic ring converters with a common primary winding. The secondary winding of each magnetic ring converter forms a transformer branch, which can output different pulse output currents. A rectifier and voltage regulator circuit is connected between the transformer circuit and the load. The rectifier and voltage regulator circuit includes multiple rectifier and voltage regulator branches, which are correspondingly connected to multiple transformer branches. The circuit is used to output multiple different pulse currents after rectifying and regulating the outputs of the multiple transformer branches, so as to provide multiple different pulse currents to loads at different potentials. The switching power supply is used to power the IGBT module; The IGBT module is connected between the switching power supply and the monitoring and control module and is used to output pulses; the IGBT module includes multiple IGBT units. The monitoring and control module is connected between the main control module of the linear modulator to which the thyristor assembly belongs and the IGBT module. It is used to transmit the trigger signal of the main control module to the IGBT unit and to monitor the status of the IGBT unit and feed it back to the main control module. The main control module is used to control the thyristor switch assembly; The IGBT unit includes: An IGBT drive circuit is connected between the monitoring and control module and the IGBT parallel circuit, used to receive the trigger signal and drive the IGBT parallel circuit. IGBT parallel circuit, connected to the voltage equalization circuit, includes multiple IGBTs; A voltage equalization circuit, connected to the switching power supply, is used to equalize the voltage of the IGBT units; The first protection circuit is a fast protection circuit, including: an IGBT control module connected in parallel with the IGBT circuit, which protects the IGBT by controlling the IGBT drive circuit. Specifically, when the monitoring and control module detects that the IGBT unit voltage exceeds the IGBT breakdown voltage, it applies a voltage to the gate of the IGBT so that multiple IGBTs are simultaneously in an amplification state. The second protection circuit, which is a slow protection circuit, includes an IGBT drive control module connected to the IGBT drive circuit. This module protects the IGBTs by controlling the plurality of IGBTs. Specifically, when the monitoring and control module detects that the voltage of the IGBT unit exceeds the IGBT breakdown voltage, it controls the IGBT drive circuit to turn on the IGBT.

2. The thyristor switch assembly according to claim 1, characterized in that, The rectifier and voltage regulator branch includes: A rectifier unit, connected between the transformer branch and the voltage regulator unit, is used to rectify and filter the output of the transformer branch. The voltage regulator unit is connected to the rectifier unit and the load, and is used to regulate the output of the rectifier unit and then provide it to the load. A rectifier control unit is used to control the conduction or cutoff of the rectifier and voltage regulation branch according to the output of the rectifier unit, wherein the pulse generation circuit is connected in series with the common primary of multiple magnetic ring converters through a high-voltage cable.

3. The thyristor switch assembly according to claim 2, characterized in that, The rectifier control unit includes a voltage monitoring unit and a switch; The voltage monitoring unit is connected between the rectifier unit and the voltage regulator unit. It is used to monitor the output of the rectifier unit and control the switching on and off of the switch according to the output of the rectifier unit, so as to control the conduction or shutdown of the rectifier and voltage regulator branch.

4. The thyristor switch assembly according to claim 3, characterized in that, The voltage monitoring unit includes: The judgment module is used to determine whether the output of the rectifier unit is higher than the voltage threshold. The control module is configured to control the switch to close when the voltage is greater than or equal to the voltage threshold, so as to short-circuit the corresponding rectifier and voltage regulator branch; and to control the switch to open when the voltage is less than the voltage threshold, so as to turn on the corresponding rectifier and voltage regulator branch.

5. A linear modulator, characterized in that, The linear modulator includes the thyristor switch assembly of claim 1.

6. An electron linear accelerator, characterized in that, The electron linear accelerator includes the linear modulator as described in claim 5.

Images