Pulse power supply topology structure and control method for mixed multiplexing of multiple load equipment

Abstract

The present application belongs to the field of pulse power technology, and specifically discloses a pulse power supply topology structure and control method for mixed reuse of multiple load equipment, the pulse power supply topology structure includes: a control module and multiple cascaded power supply modules; the power supply module includes a storage capacitor, a parallel discharge switch component, a series discharge switch component, a charging tail switch, a first isolation diode and a second isolation diode; the control module is used to control the working state of the parallel discharge switch component, the series discharge switch component and the charging tail switch in each power supply module. The power supply module can be expanded according to application requirements, can be converted between multiple power supply topologies, and significantly reduce the complexity of equipment design through component reuse, is suitable for a variety of load equipment, has good fault self-protection capabilities, and significantly improves the applicability and controllability of the pulse power supply under complex working conditions.

Description

Technical Field

[0001] The present application belongs to the field of pulse power technology, and more specifically, relates to a pulse power supply topology structure and a control method for mixed multiplexing of multiple load equipment. Background Art

[0002] With the development of pulse power technology, facing increasingly complex load forms and power parameter requirements, traditional pulse power supplies are difficult to meet application requirements.

[0003] For high-impedance load equipment with high-voltage requirements, traditional pulse power supplies mostly use Marx topology. Traditional gas-gap Marx is bulky, difficult to install, has low reliability, and is significantly affected by distributed parameters. The all-solid-state Marx power supply is limited by the device and has a low output current, making it difficult to apply to low-impedance load conditions. For low-impedance load equipment with high current requirements, such as electromagnetic emission, the current mainstream power supply structure is the pulse forming network (PFN) topology. By adopting a unit component design, each pulse power supply component is an independent power supply, and the output current of a single power supply component is limited. For conditions that exceed the output current upper limit of a single power supply component, multiple power supply components are often discharged simultaneously to meet the output current requirements, but the output voltage is limited by the capacitor voltage. For special load equipment such as metal wire electric explosion and underwater pulse discharge that require composite power pulse output to improve the effect, an initial high voltage is required to meet the load phase change or breakdown requirements, and subsequent large current injection is required to maintain the development of the plasma channel. The existing power supply topology is difficult to meet the power supply design requirements, and high-voltage power supplies are often used in parallel with high-current power supplies. The equipment is bulky and difficult to expand. At the same time, it is difficult to balance the insulation and current flow problems of the two sets of power supplies, which significantly increases the complexity of power supply design.

[0004] When there are multiple load devices in a device, different types of load devices have significantly different requirements for output electrical pulse parameters. Usually, a separate power supply design is required for each load device, which increases the size of the entire device and the design complexity. At the same time, in the strong electromagnetic environment of multiple complex loads, the reliability of the pulse power supply also faces huge challenges. Summary of the invention

[0005] In view of the defects of the prior art, the purpose of this application is to improve the adaptability of the pulse power supply to different equipment working conditions and different working environments, realize topology reconstruction through switching actions, use a single power supply to meet the pulse power requirements of multiple equipment, realize mixed multiplexing of pulse power supplies for multiple equipment, and thus realize the miniaturization of the power supply system, reduce the complexity of power supply design through component reuse, improve the power supply expansion capability through modular distributed power supply design, and improve the power supply reliability through power supply self-protection capability.

[0006] To achieve the above-mentioned purpose, in a first aspect, the present application provides a pulse power supply topology structure for mixed multiplexing of multiple load equipment, including: a control module and a plurality of cascaded power supply modules;

[0007] The power module includes an energy storage capacitor, a parallel discharge switch component, a series discharge switch component, a charge tail switch, a first isolation diode and a second isolation diode;

[0008] For each component in the same power module, the first end of the energy storage capacitor, the anode of the parallel discharge switch component and the anode of the series discharge switch component are connected, the second end of the energy storage capacitor, the cathode of the charge truncation switch and the anode of the second isolation diode are connected, the cathode of the parallel discharge switch component and the anode of the first isolation diode are connected, and the cathode of the series discharge switch component, the anode of the charge truncation switch and the cathode of the second isolation diode are connected;

[0009] For two adjacent power modules, the cathode of the first isolation diode in the upper power module is connected to the anode of the first isolation diode in the lower power module, and the cathode of the second isolation diode in the upper power module is connected to the anode of the second isolation diode in the lower power module;

[0010] The anode of the first isolation diode in the primary power module is connected to the charging module, and the anode of the second isolation diode in the primary power module is grounded;

[0011] The cathode of the first isolation diode and the cathode of the second isolation diode in the final power module are commonly connected to the load;

[0012] The control module is used to control the working states of the parallel discharge switch components, the series discharge switch components and the charging tail switch in each power module. The parallel discharge switch components are used to construct a parallel discharge circuit, the series discharge switch components are used to construct a series discharge circuit, and the charging tail switch is used to construct a charging circuit and a load charge release circuit (which will be described in detail later).

[0013] It can be understood that the switch component or the switch may have a unidirectional conduction characteristic, and when the switch component or the switch is in the on state, the anode and the cathode are used to guide the current to enter and flow out.

[0014] For example, for the anode and cathode of the parallel discharge switch component, when the parallel discharge switch component is in the on state, the anode is used to guide the current into the parallel discharge switch component, and the cathode is used to guide the current out of the parallel discharge switch component.

[0015] For example, for the anode and cathode of the series discharge switch component, when the series discharge switch component is in the on state, the anode is used to guide the current into the series discharge switch component, and the cathode is used to guide the current out of the series discharge switch component.

[0016] For example, with respect to the anode and cathode of the charge truncation switch, when the charge truncation switch is in the on state, the anode is used to guide the current into the charge truncation switch, and the cathode is used to guide the current out of the charge truncation switch.

[0017] For example, the anode and the cathode of the isolation diode (the first isolation diode or the second isolation diode), the anode is used to guide the current into the isolation diode, and the cathode is used to guide the current out of the isolation diode.

[0018] For the first-stage power supply module (the power supply module at the first stage among the multiple power supply modules in the above cascade), the anode of the first isolation diode in the first-stage power supply module is connected to the charging module, the cathode of the first isolation diode in the first-stage power supply module is connected to the anode of the first isolation diode in the next-stage power supply module, the anode of the second isolation diode in the first-stage power supply module is grounded, and the cathode of the second isolation diode in the first-stage power supply module is connected to the anode of the second isolation diode in the next-stage power supply module.

[0019] For any intermediate-level power supply module (a power supply module located between the first-level power supply module and the last-level power supply module in the above-mentioned cascaded multiple power supply modules), the anode of the first isolation diode in the intermediate-level power supply module is connected to the cathode of the first isolation diode in the previous-level power supply module, the cathode of the first isolation diode in the intermediate-level power supply module is connected to the anode of the first isolation diode in the next-level power supply module, the anode of the second isolation diode in the intermediate-level power supply module is connected to the cathode of the second isolation diode in the previous-level power supply module, and the cathode of the second isolation diode in the intermediate-level power supply module is connected to the anode of the second isolation diode in the next-level power supply module.

[0020] For the final power supply module (the power supply module at the final stage among the multiple power supply modules in the above cascade), the anode of the first isolation diode in the final power supply module is connected to the cathode of the first isolation diode in the previous power supply module, and the cathode of the first isolation diode in the final power supply module is connected to the load, the anode of the second isolation diode in the final power supply module is connected to the cathode of the second isolation diode in the previous power supply module, and the cathode of the second isolation diode in the final power supply module is connected to the load, and the cathode of the first isolation diode and the cathode of the second isolation diode are connected, and are jointly connected to the load.

[0021] The working principle of the pulse power supply topology is introduced here.

[0022] (1) The control module can control the parallel discharge switch components in each power module to be in the cut-off state, the series discharge switch components to be in the cut-off state, and the charging truncation switch to be in the conducting state. The series discharge switch components are used to construct a series discharge loop, and then a charging loop is formed. In this case, the pulse power topology is in the charging mode.

[0023] (2) The control module can control the parallel discharge switch components in each power module to be in the cut-off state, the series discharge switch components to be in the conducting state, and the charging truncation switch to be in the cut-off state, thereby forming a series discharge loop. In this case, the pulse power topology is in the series discharge mode.

[0024] (3) The control module can control the parallel discharge switch components in each power module to be in the conducting state, the series discharge switch components to be in the cut-off state, and the charging truncation switch to be in the cut-off state. The parallel discharge switch components are used to construct a parallel discharge loop, and then a parallel discharge loop is formed. In this case, the pulse power topology is in the parallel discharge mode.

[0025] (4) The control module can control the parallel discharge switch components in the first m power modules to be in the cut-off state, the series discharge switch components to be in the conducting state, and the charging truncation switch to be in the cut-off state, and control the parallel discharge switch components in the remaining n - m power modules to be in the conducting state, the series discharge switch components to be in the cut-off state, and the charging truncation switch to be in the cut-off state. n is the total number of the multiple power modules, and 1 ≤ m < n. In this case, the pulse power topology is in the composite power output mode.

[0026] Therefore, the pulse power topology provided by this application can perform various discharge modes such as series discharge, parallel discharge, and composite pulse power output according to the power requirements of the load equipment, accurately output high-voltage and large-current pulses, meet the power requirements of various load equipment, expand the applicable range of the pulse power supply, realize the hybrid reuse of power supplies for various load equipment, and reduce the volume and design complexity of the power supply system.

[0027] In a possible implementation manner, for the specific structure of the parallel discharge switch components, the parallel discharge switch components specifically include: a thyristor and a diode. Among them, the anode of the thyristor is connected to the cathode of the diode, and the cathode of the thyristor is connected to the anode of the diode. The anode of the thyristor serves as the anode of the parallel discharge switch components, and the cathode of the thyristor serves as the cathode of the parallel discharge switch components.

[0028] In a possible implementation manner, for the specific structure of the series discharge switch components, the series discharge switch components specifically include: multiple transistors, and the multiple transistors are connected in series.

[0029] In a possible implementation, the pulse power supply topology structure also includes a charging module, which specifically includes: a charging power supply, a charging switch and a third isolation diode, the positive electrode of the charging power supply is connected to the first contact of the charging switch, the negative electrode of the charging power supply is grounded, the second contact of the charging switch is connected to the anode of the third isolation diode, and the cathode of the third isolation diode is connected to the anode of the first isolation diode in the primary power supply module.

[0030] In a second aspect, the present application provides a control method for a pulse power supply topology structure, which is applied to any of the above-mentioned pulse power supply topologies, and the method comprises:

[0031] Determining a target operating mode of the pulse power supply topology (e.g., a charging mode, a series discharge mode, a parallel discharge mode, and a composite power output mode, etc.);

[0032] Based on the target working mode, the working states of the parallel discharge switch components, the series discharge switch components and the charge tail switch in each power module are controlled.

[0033] Optionally, the above-mentioned "based on the target working mode, controlling the working states of the parallel discharge switch components, the series discharge switch components and the charging tail-off switches in each power module" specifically includes: when the target working mode is the charging mode, (through the control module) controlling the parallel discharge switch components in each power module to be in the off state, the series discharge switch components to be in the off state and the charging tail-off switch to be in the on state, thereby forming a charging circuit.

[0034] The pulse power supply topology structure may further include a charging module (the charging module specifically includes: a charging power supply, a charging switch and a third isolation diode), the positive electrode of the charging power supply is connected to the first contact of the charging switch, the negative electrode of the charging power supply is grounded, the second contact of the charging switch is connected to the anode of the third isolation diode, and the cathode of the third isolation diode is connected to the anode of the first isolation diode in the primary power supply module. When the target working mode is the charging mode, the method further includes (through the control module) controlling the charging switch in the charging module to be in a conducting state. The charging switch can be in a conducting state or an open circuit state. When the charging switch is in a conducting state, the first contact and the second contact in the charging switch remain electrically connected. When the charging switch is in an open circuit state, the first contact and the second contact in the charging switch are not conducting.

[0035] Optionally, the above "controlling the operating states of the parallel discharge switch assemblies, series discharge switch assemblies, and charging truncation switches in each power module based on the target operating mode" specifically includes: when the target operating mode is the series discharge mode, (through the control module) controlling the parallel discharge switch assemblies in each power module to be in the cut-off state, the series discharge switch assemblies to be in the conducting state, and the charging truncation switches to be in the cut-off state, thereby forming a series discharge loop.

[0036] Optionally, the above "controlling the operating states of the parallel discharge switch assemblies, series discharge switch assemblies, and charging truncation switches in each power module based on the target operating mode" specifically includes: when the target operating mode is the parallel discharge mode, (through the control module) controlling the parallel discharge switch assemblies in each power module to be in the conducting state, the series discharge switch assemblies to be in the cut-off state, and the charging truncation switches to be in the cut-off state, thereby forming a parallel discharge loop.

[0037] Optionally, the above "controlling the operating states of the parallel discharge switch assemblies, series discharge switch assemblies, and charging truncation switches in each power module based on the target operating mode" specifically includes: when the target operating mode is the composite power output mode, controlling the parallel discharge switch assemblies in the first m power modules to be in the cut-off state, the series discharge switch assemblies to be in the conducting state, and the charging truncation switches to be in the cut-off state, and controlling the parallel discharge switch assemblies in the remaining n - m power modules to be in the conducting state, the series discharge switch assemblies to be in the cut-off state, and the charging truncation switches to be in the cut-off state, where n is the total number of the multiple power modules, 1 ≤ m < n. In this case, the pulse power topology is in the composite power output mode.

[0038] It can be understood that the beneficial effects of the second aspect above can be referred to the relevant descriptions in the first aspect above, and will not be elaborated here.

[0039] Generally speaking, compared with the prior art, the above technical solution conceived by this application has the following beneficial effects:

[0040] (1) Multiple discharge modes such as series discharge, parallel discharge, and composite pulse power output are performed according to the load power demand. High-voltage and high-current pulses can be accurately output according to the pulse power demand of the load equipment, meeting the requirements of various load equipment, expanding the application range of the pulse power supply, realizing the hybrid reuse of power supplies for various load equipment, and reducing the volume and design complexity of the power supply system.

[0041] (2) Adopting a modular distributed design, series expansion can be carried out according to application requirements, and at the same time, it is convenient to replace faulty power modules. The isolation diodes are also used as charging and freewheeling diodes, significantly reducing the power supply design complexity and cost through component reuse.

[0042] (3) It has good self-protection performance against various switch failures, which can significantly improve the reliability and life of the equipment. At the same time, each switch can be turned on at any timing to achieve precise control of the output power parameters. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] Figure 1 It is a schematic diagram of a pulse power supply topology structure for mixed multiplexing of various load equipment provided in an embodiment of the present application;

[0044] Figure 2 It is a schematic diagram of the charging mode of the pulse power supply topology structure provided in the embodiment of the present application;

[0045] Figure 3 This is a schematic diagram of a series discharge mode of a pulse power supply topology structure provided in an embodiment of the present application;

[0046] Figure 4 It is a schematic diagram of a truncated mode of a pulse power supply topology structure provided in an embodiment of the present application;

[0047] Figure 5 Schematic diagram of the parallel discharge mode of the pulse power supply topology structure provided in the embodiment of the present application;

[0048] Figure 6 It is a schematic diagram of the freewheeling mode of the pulse power supply topology structure provided in the embodiment of the present application;

[0049] Figure 7 It is a schematic diagram of a composite power output mode of a pulse power supply topology structure provided in an embodiment of the present application;

[0050] Figure 8 It is a schematic diagram of a failure of a series discharge switch component of a pulse power supply topology structure provided in an embodiment of the present application not being turned on;

[0051] Fig. 9 It is a schematic diagram of a non-conduction fault of a parallel discharge switch component of a pulse power supply topology structure provided in an embodiment of the present application;

[0052] Fig.10 It is a schematic diagram of a simultaneous conduction failure of a series discharge switch component and a parallel discharge switch component of a pulse power supply topology structure provided in an embodiment of the present application;

[0053] Fig.11 It is a flow chart of a control method of a pulse power supply topology structure provided in an embodiment of the present application. DETAILED DESCRIPTION

[0054] In order to make the purpose, technical solution and advantages of the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0055] The terms "first" and "second" in the specification and claims herein are used to distinguish different objects rather than to describe a specific order of the objects. For example, a first isolation diode and a second isolation diode are used to distinguish different isolation diodes rather than to describe a specific order of the isolation diodes.

[0056] In the embodiments of the present application, words such as "exemplary" or "for example" are used to indicate examples, illustrations or descriptions. Any embodiment or design described as "exemplary" or "for example" in the embodiments of the present application should not be interpreted as being more preferred or more advantageous than other embodiments or designs. Specifically, the use of words such as "exemplary" or "for example" is intended to present related concepts in a specific way.

[0057] In the description of the embodiments of the present application, unless otherwise specified, "multiple" means two or more than two. For example, multiple processing units refer to two or more processing units, etc.; multiple elements refer to two or more elements, etc.

[0058] The embodiments of the present application are described below in conjunction with the drawings in the embodiments of the present application.

[0059] Figure 1 Schematic diagram of a pulse power supply topology structure for mixed multiplexing of multiple load equipment provided in an embodiment of the present application, such as Figure 1 As shown, the pulse power supply topology includes: control module ( Figure 1 ) and multiple power modules in cascade (such as Figure 1 Power modules 1-n in the .

[0060] The power module includes a storage capacitor C, a parallel discharge switch component S a , Series discharge switch component S b , Charging cutoff switch S c , the first isolation diode D a and the second isolation diode D b .

[0061] For each component in the same power module, the first end of the energy storage capacitor C and the parallel discharge switch component S a The anode and series discharge switch assembly S b The anode of the three are connected, the second end of the energy storage capacitor C, the charging tail switch S c The cathode of the second isolation diode Db The anodes of the three are connected, and the parallel discharge switch component S a The cathode of the first isolation diode D a The anode is connected in series with the discharge switch component S b The cathode of the charging tail switch S c The anode of the second isolation diode D b The cathode of the three are connected.

[0062] For two adjacent power modules, the cathode of the first isolation diode in the upper power module is connected to the anode of the first isolation diode in the lower power module, and the cathode of the second isolation diode in the upper power module is connected to the anode of the second isolation diode in the lower power module.

[0063] For example, Figure 1 As shown, for adjacent power modules 1 and 2, the first isolation diode D in power module 1 (as the upper power module) a1 The cathode of the diode is connected to the first isolation diode D in the power module 2 (as the next power module). a2 The anode of the second isolation diode D in the power module 1 b1 The cathode of the second isolation diode D in power module 2 is connected b2 anode.

[0064] The anode of the first isolation diode in the primary power module is connected to the charging module, and the anode of the second isolation diode in the primary power module is grounded.

[0065] For example, Figure 1 As shown, the first isolation diode D in the power module 1 (as the first-stage power module) a1 The anode of the charging module is connected to the second isolation diode D in the power module 1 b1 The anode is grounded.

[0066] The cathode of the first isolation diode and the cathode of the second isolation diode in the final-stage power module are commonly connected to the load.

[0067] For example, Figure 1 As shown, the first isolation diode D in the power module n (as the final power module) an The cathode of the second isolation diode D bn The cathodes of the two electrodes are connected together to a load (Load).

[0068] The control module is used to control the parallel discharge switch components S in each power module. a , Series discharge switch component S b and charging cut-off switch S cThe working state (through the switch action to achieve multiple power modules in series or parallel operation, output load required power pulse), parallel discharge switch component S a Used to construct a parallel discharge circuit, and a series discharge switch component S b Used to build a series discharge circuit, charging tail switch S c Used to construct charging circuits and load charge release circuits.

[0069] It is understandable that, since the power module adopts a modular design, the number of power modules in the pulse power supply topology can be adjusted in a series expansion manner according to application requirements.

[0070] The load uses the power pulses output by the power module to achieve electrical energy conversion.

[0071] For example, the control module can control the parallel discharge switch components (S a1 -S an ) is in the cut-off state, and the discharge switch component (S b1 -S bn ) is in the off state and the charging tail switch (S c1 -S cn ) is in the on state, and the discharge switch component (S b1 -S bn ) is used to construct a series discharge circuit, and the current passes through the first isolation diode D of each power module a , parallel discharge switch assembly S a The diode and the charge cut-off switch S c The pulse power supply topology is in charging mode, and each energy storage capacitor (C1-C n ) Parallel charging.

[0072] For example, the control module can control the parallel discharge switch components (S a1 -S an ) is in the cut-off state, and the discharge switch component (S b1 -S bn ) is in the on state and the charging tail switch (S c1 -S cn ) is in the cut-off state, thereby forming a series discharge loop. In this case, the pulse power supply topology is in the series discharge mode.

[0073] Energy storage capacitor C1-C n Through each power module in series discharge switch components (S b1 -S bn ) forms a series discharge circuit, the energy storage capacitor discharges in series to the load, the output voltage is superimposed, and the output voltage is:

[0074] V out =U0;

[0075] Among them, V out is the output voltage, n is the number of power modules, and U0 is the energy storage power supply voltage.

[0076] It can be understood that during the series discharge process, the series discharge switch component (S b1 -S bn ) is turned off, the charging tail switch (S c1 -S cn ) is turned on, the pulse power topology enters the truncated mode, and the load is charged through the truncated switch (S c1 -S cn ) to achieve rapid release of charge and rapid drop of output voltage.

[0077] For example, the control module can control the parallel discharge switch components (S a1 -S an ) is in the on state, the series discharge switch component (S b1 -S bn ) is in the off state and the charging tail switch (S c1 -S cn ) is in the cut-off state, the parallel discharge switch component (S a1 -S an ) is used to construct a parallel discharge circuit, the energy storage capacitor (C1-C n ) through the parallel discharge switch components S of each power module a , the first isolation diode D a and the second isolation diode D b A parallel discharge circuit is formed. In this case, the pulse power supply topology is in parallel discharge mode.

[0078] Energy storage capacitor (C1-C n ) discharges the load in parallel, and the output current is superimposed. The output current is:

[0079] I out =I o ;

[0080] Among them I out is the output current, n is the number of power modules, and I0 is the discharge current of a single power module.

[0081] It is understandable that during the parallel discharge process, the energy storage capacitor (C1-C n ) When the electric energy is fully released, the parallel discharge switch assembly (S a1 -S an ) is turned off, and the second isolation diode (Db1 -D bn ) forms a freewheeling circuit, and the pulse power supply topology enters the freewheeling mode to avoid reverse charging of the energy storage capacitor.

[0082] Exemplarily, the control module can control the parallel discharge switch assemblies (S a1 -S am ) in the first m power modules to be in the cut-off state, the series discharge switch assemblies (S b1 -S bm ) to be in the conducting state, and the charging truncation switch (S c1 -S cm ) to be in the cut-off state, and control the parallel discharge switch assemblies (S a(m+1) -S an ) in the remaining n - m power modules to be in the conducting state, the series discharge switch assemblies (S b(m+1) -S bn ) to be in the cut-off state, and the charging truncation switch (S c(m+1) -S cn ) to be in the cut-off state. n is the total number of multiple power modules, and 1 ≤ m < n. In this case, the pulse power supply topology is in the composite power output mode.

[0083] It can be understood that in the composite power output mode, the energy storage capacitor first discharges in series, and the output voltage amplitude is:

[0084] V out =(m + 1)U0;

[0085] When the energy of the energy storage capacitors C1 - C m is completely released, the series discharge switch assemblies S b1 -S bm cut off, and the second isolation diode D b1 -D bm conducts, and the circuit enters the parallel discharge mode. At this time, the voltage of the capacitors C m+1 -C n is:

[0086]

[0087] The output current is:

[0088] I out =(n - m)I1;

[0089] where I1 is the discharge current of a single power module in the composite power output mode.

[0090] It can be understood that in the series discharge, parallel discharge, and composite power output modes, the series-connected discharge switch assemblies S biWhen (1 < < n) is not conducting normally, the second isolation diode D bi will conduct, causing the energy storage capacitor C i to be disconnected from the series discharge circuit, achieving self - protection; when the parallel discharge switch assembly S aj (1 < < n) is not conducting normally, the first isolation diode D aj will conduct, causing the energy storage capacitor C j to be disconnected from the parallel discharge circuit, achieving self - protection; if the parallel discharge switch assembly S ak (1 < < n) and the series discharge switch assembly S bk conduct simultaneously, the voltage of the energy storage capacitor C k will cause the parallel discharge switch assembly S ak to cut off, and the energy storage capacitor C k will enter the series discharge circuit, achieving self - protection. The pulse power topology has good self - protection performance for switch - timing conduction.

[0091] Therefore, the pulse power topology provided by this application can perform various discharge modes such as series discharge, parallel discharge, and composite pulse power output according to the power requirements of the load equipment, accurately output high - voltage and large - current pulses, meet the power requirements of various load equipment, improve the applicable range of the pulse power supply, and the pulse power topology can be applicable to the hybrid reuse of multiple load equipment (multiple load equipment use the pulse power topology in a hybrid reuse manner; reuse means that the same pulse power topology is shared by multiple load equipment; hybrid means that multiple modes are involved during the reuse process, such as series discharge mode, parallel discharge mode, and composite power output mode, etc.), reducing the volume and design complexity of the power system.

[0092] In a possible implementation, for the specific structure of the parallel discharge switch assembly S a The parallel discharge switch assembly specifically includes: a thyristor and a diode. Among them, the anode of the thyristor is connected to the cathode of the diode, the cathode of the thyristor is connected to the anode of the diode, the anode of the thyristor serves as the anode of the parallel discharge switch assembly, and the cathode of the thyristor serves as the cathode of the parallel discharge switch assembly.

[0093] In a possible implementation, for the specific structure of the series discharge switch assembly S b The series discharge switch assembly specifically includes: multiple transistors, and the multiple transistors are connected in series.

[0094] In a possible implementation, as Figure 1 shown, the pulse power topology further includes a charging module. The charging module specifically includes: a charging power supply E, a charging switch K1, and a third isolation diode D kThe positive electrode of the charging power source E is connected to the first contact of the charging switch K1, the negative electrode of the charging power source E is grounded, and the second contact of the charging switch K1 is connected to the third isolation diode D k The anode of the third isolation diode D k The cathode is connected to the primary power module (such as Figure 1 The first isolation diode D in the power module 1) a1 anode.

[0095] Combine the following Figure 1 The power module provided in the embodiment of the present application is exemplified.

[0096] like Figure 1 As shown, the number of power modules connected in series is 4, the energy storage capacitor C has a rated capacity of 5μF and a rated voltage of 10kV; the parallel discharge switch component S a Using optical fiber triggering, using thyristor (thyristor has three electrodes, namely anode (A), cathode (K) and gate (G)) and its diode (the thyristor and diode in the parallel discharge switch component are in reverse parallel relationship, that is, the anode of the thyristor is connected to the cathode of the diode, and the cathode of the thyristor is connected to the anode of the diode); the series discharge switch component S b1 -S bn Each component in the embodiment uses three switches in series (three transistors (such as insulated gate bipolar transistors IGBT) are connected in series to form a series discharge switch component. Figure 1 shows a transistor, such as Figure 1 The IGBT shown has three pins (collector, emitter and gate) and contains a diode inside the IGBT. For two adjacent IGBTs, the emitter of the upper IGBT is connected to the collector of the lower IGBT. The collector of the first IGBT serves as the anode of the series discharge switch component, and the emitter of the last IGBT serves as the cathode of the series discharge switch component. Compared with a single transistor, the series discharge switch component can adapt to a higher operating voltage); the charging tail switch S c An IGBT may be used, with the collector of the IGBT serving as the anode of the charge truncation switch and the emitter of the IGBT serving as the cathode of the charge truncation switch.

[0097] Combine the following Figure 2 The charging mode provided in the embodiment of the present application is exemplified.

[0098] Figure 2 is a schematic diagram of the charging mode of the pulse power supply topology structure provided in the embodiment of the present application, such as Figure 2 As shown, the charging switch K1 is closed and the charging tail switch S in the power module is closed. c1 -S c4 Conducting, parallel discharge switch component Sa1 -S a4 Cut-off, series discharge switch component S b1 -S b4 When it is turned off, the pulse power topology enters the charging mode, and the current passes through the first isolation diode D of each power module. a1 -D a3 , the diode of the parallel discharge switch assembly and the charging tail switch S c1 -S c4 The charging circuit is formed, and the energy storage capacitors C1-C4 are charged in parallel. During the charging process, D b1 -D b4 In cut-off state.

[0099] For example, the charging switch K1 adopts a contact relay, the charging power source E adopts a test transformer with a transformation ratio of 380V / 10kV and a rated capacity of 10kV.A, and the capacitor charging voltage is 5kV.

[0100] Combine the following Figure 3-4 The series discharge mode provided in the embodiment of the present application is exemplarily described.

[0101] Figure 3 is a schematic diagram of the series discharge mode of the pulse power supply topology structure provided in the embodiment of the present application, such as Figure 3 As shown, after the energy storage capacitor is charged (by monitoring the voltage across the energy storage capacitor to determine whether the charging is completed), the charging switch K1 is disconnected, and the discharge switch component S is connected in series. b1 -S b4 Conducting, parallel discharge switch component S a1 -S a4 Cut-off, charging tail switch S c1 -S c4 When the pulse power supply topology is turned off, it enters the series discharge mode, and the energy storage capacitors C1-C4 are discharged in series through each power module switch component S b1 -S b4 A series discharge circuit is formed, the capacitor discharges in series to the load, the output voltage is superimposed, and the output voltage is:

[0102] V out =U0;

[0103] Among them, V out is the output voltage, n is the number of power modules which is 4, and U0 is the energy storage power supply voltage which is 5kV.

[0104] For example, in the series discharge mode, the load is a non-inductive resistor with a resistance of 100Ω and a rated voltage of 50kV (a non-inductive resistor refers to a resistor device that can work in a high-frequency circuit without generating inductance, thereby avoiding the influence of inductance on circuit performance), the output voltage amplitude is 20kV, and the rise time is about 251ns.

[0105] Figure 4 is a schematic diagram of a truncated mode of a pulse power supply topology structure provided in an embodiment of the present application, such as Figure 4 As shown, during the series discharge process, the series discharge switch component S b1 -S bn Cut-off, charging tail switch S c1 -S cn When turned on, the pulse power topology enters the truncated mode, and the load is charged through the truncated switch S c1 -S cn Realize the rapid release of charge and the rapid drop of output voltage.

[0106] Exemplarily, the voltage duration is about 2 μs, and the voltage fall time is about 352 ns.

[0107] Combine the following Figure 5-6 The parallel discharge mode provided in the embodiment of the present application is exemplarily described.

[0108] Figure 5 Schematic diagram of the parallel discharge mode of the pulse power supply topology structure provided in the embodiment of the present application, such as Figure 5 As shown, if the parallel discharge switch component S a1 -S a4 Conducting, series discharge switch component S b1 -S b4 Cut-off, charging tail switch S c1 -S c4 When the pulse power supply topology is turned off, it enters the parallel discharge mode, and the energy storage capacitors C1-C4 are discharged in parallel through each power module switch component S a1 -S a4 , the first isolation diode D a1 -D a4 and the second isolation diode D b1 -D b3 A parallel discharge circuit is formed, the capacitor discharges in parallel to the load, the output current is superimposed, and the output current is:

[0109] I out =I0;

[0110] Among them, I out is the output current, n represents the number of power modules, in this example n is equal to 4, and I0 is the discharge current of a single power module.

[0111] For example, the parallel discharge load resistance is 1Ω, the inductance is 20μH, the output current peak of a single power module is about 691A, the parallel discharge current is about 2760A, and the current pulse width is about 873μs.

[0112] Figure 6 Schematic diagram of the freewheeling mode of the pulse power supply topology structure provided in the embodiment of the present application, such as Figure 6 As shown, during the parallel discharge process, when the energy storage capacitors C1-C4 are fully released, the parallel discharge switch component S a1 -S a4 Cut-off, the second isolation diode D b1 -D b4 A freewheeling loop is formed, and the pulse power supply topology enters the freewheeling mode to avoid reverse charging of the energy storage capacitor.

[0113] Combine the following Figure 7 The composite power output mode provided in the embodiment of the present application is exemplarily described.

[0114] Figure 7 Schematic diagram of the composite power output mode of the pulse power supply topology structure provided in the embodiment of the present application, such as Figure 7 As shown, if the series discharge switch components S of the first two power modules in the four power modules b1 -S b2 Conducting, parallel discharge switch component S a1 -S a2 Cut-off, charging tail switch S c1 -S c2 Cut off; the parallel discharge switch components S of the remaining two power modules a3 -S a4 Conducting, series discharge switch component S b3 -S b4 Cut-off, charging tail switch S c3 -S c4 At the end, the pulse power supply topology enters the composite power output mode, and the energy storage capacitor topology first discharges in series, and the output voltage amplitude is:

[0115] V out =3U0;

[0116] Then, when the energy of the energy storage capacitors C1-C2 is completely released, the series discharge switch component S b1 -S b2 Cut-off, the second isolation diode D b1 -D b2 The circuit enters the parallel discharge mode, and the voltage of the energy storage capacitor C3-C4 is:

[0117] U1=0.5U0;

[0118] The output current is:

[0119] I out =2I1;

[0120] Wherein, I1 is the discharge current of a single power module in the composite power output mode.

[0121] Exemplarily, in the composite power output mode, the load resistance is 1Ω, the inductance is 20μH, the output voltage amplitude is 15kV, and after discharging for about 9μs, the electric energy of C1 and C2 is completely released, the voltage of capacitors C3 and C4 is 2.5kV, the output current amplitude is 3653A, and the current pulse width is 634μs.

[0122] Combine the following Figure 8-10 The self-protection performance of the pulse power supply topology structure provided in the embodiment of the present application is exemplified.

[0123] Figure 8 Schematic diagram of a failure of a series discharge switch component of a pulse power supply topology structure provided in an embodiment of the present application not being turned on. Figure 8 As shown, in the series discharge, parallel discharge and composite power output modes, the series discharge switch component S b3 When the second isolation diode D b3 It will be turned on, so that the energy storage capacitor C3 is out of the series discharge loop to achieve self-protection.

[0124] Fig. 9 Schematic diagram of a non-conduction fault of a parallel discharge switch component of a pulse power supply topology structure provided in an embodiment of the present application, such as Fig. 9 As shown, the parallel discharge switch component S a3 When the first isolation diode D a3 It will be turned on, so that the energy storage capacitor C3 is out of the parallel discharge circuit to achieve self-protection.

[0125] Fig.10 Schematic diagram of a fault in which a series discharge switch component and a parallel discharge switch component of a pulse power supply topology structure provided in an embodiment of the present application are simultaneously turned on. Fig.10 As shown, if the parallel discharge switch component S a3 And the series discharge switch component S b3 When both are turned on, the voltage of the energy storage capacitor C3 will cause the parallel discharge switch component S a3 When it is turned off, the energy storage capacitor C3 enters the series discharge circuit to achieve self-protection.

[0126] Therefore, the pulse power supply topology provided in the embodiment of the present application has good self-protection performance for switch timing conduction, and can arbitrarily adjust the switch timing according to load requirements to achieve arbitrary adjustment of the output power pulse.

[0127] The present application also provides a control method for a pulse power supply topology structure, and the execution subject of the method may be a control module in the pulse power supply topology structure. Fig.11is a flow chart of a control method for a pulse power supply topology structure provided in an embodiment of the present application, such as Fig.11 As shown, the method includes step S101 and step S102.

[0128] Step S101, determining a target operating mode of a pulse power supply topology structure (eg, a charging mode, a series discharge mode, a parallel discharge mode, a composite power output mode, etc.).

[0129] Step S102, based on the target working mode, controlling the working states of the parallel discharge switch components, the series discharge switch components and the charge truncation switches in each power module.

[0130] Optionally, the above step S102 specifically includes: when the target working mode is the charging mode, (through the control module) controlling the parallel discharge switch components S in each power module a In the cut-off state, the discharge switch component S is connected in series b In the off state and charging tail switch S c It is in the on state, thus forming a charging circuit.

[0131] The pulse power supply topology structure may also include a charging module (the charging module specifically includes: a charging power supply E, a charging switch K1 and a third isolation diode D k ), when the target working mode is the charging mode, the method further comprises (through the control module) controlling the charging switch K1 in the charging module to be in an on state. The charging switch K1 can be in an on state or an off state. When the charging switch K1 is in an on state, the first contact and the second contact in the charging switch are electrically connected. When the charging switch K1 is in an off state, the first contact and the second contact in the charging switch are not conductive.

[0132] Optionally, the above step S102 specifically includes: when the target working mode is the series discharge mode, (through the control module) controlling the parallel discharge switch components S in each power module a In the cut-off state, the discharge switch component S is connected in series b In the on state and charging tail switch S c It is in the cut-off state, thus forming a series discharge circuit.

[0133] Optionally, the above step S102 specifically includes: when the target working mode is the parallel discharge mode, (through the control module) controlling the parallel discharge switch components S in each power module a In the on state, the discharge switch component S is connected in series b In the off state and charging tail switch S c It is in the cut-off state, thus forming a parallel discharge circuit.

[0134] Optionally, step S102 described above specifically includes: when the target operating mode is the composite power output mode, controlling the parallel discharge switch assemblies (S a1 -S am ) in the first m power modules to be in the cut-off state, the series discharge switch assemblies (S b1 -S bm ) to be in the conducting state, and the charge tailing switches (S c1 -S cm ) to be in the cut-off state, controlling the parallel discharge switch assemblies (S a(m+1) -S an ) in the remaining n - m power modules to be in the conducting state, the series discharge switch assemblies (S b(m+1) -S bn ) to be in the cut-off state, and the charge tailing switches (S c(m+1) -S cn ) to be in the cut-off state, where n is the total number of multiple power modules, 1 ≤ m < n. In this case, the pulse power topology is in the composite power output mode.

[0135] It should be understood that expressions such as "including" and "may include" that can be used in this application indicate the existence of the disclosed functions, operations, or constituent elements, and do not limit one or more additional functions, operations, and constituent elements. In this application, terms such as "including" and / or "having" can be interpreted as indicating a specific characteristic, number, operation, constituent element, component, or a combination thereof, but cannot be interpreted as excluding the existence or possibility of addition of one or more other characteristics, numbers, operations, constituent elements, components, or a combination thereof.

[0136] The above are only the specific embodiments of this application, but the protection scope of this application is not limited thereto. Any person skilled in the art within the technical scope disclosed in this application can easily think of changes or substitutions, which should all be covered by the protection scope of this application. Therefore, the protection scope of this application should be subject to the protection scope of the claims.

Claims

1. A pulse power supply topology structure for mixed multiplexing of multiple load equipment, characterized in that: include: Control module and multiple power modules in cascade; The power module includes an energy storage capacitor, a parallel discharge switch component, a series discharge switch component, a charge truncation switch, a first isolation diode and a second isolation diode; For each component in the same power module, the first end of the energy storage capacitor, the anode of the parallel discharge switch component and the anode of the series discharge switch component are connected, the second end of the energy storage capacitor, the cathode of the charge truncation switch and the anode of the second isolation diode are connected, the cathode of the parallel discharge switch component and the anode of the first isolation diode are connected, and the cathode of the series discharge switch component, the anode of the charge truncation switch and the cathode of the second isolation diode are connected; For two adjacent power modules, the cathode of the first isolation diode in the upper power module is connected to the anode of the first isolation diode in the lower power module, and the cathode of the second isolation diode in the upper power module is connected to the anode of the second isolation diode in the lower power module; The anode of the first isolation diode in the primary power module is connected to the charging module, and the anode of the second isolation diode in the primary power module is grounded; The cathode of the first isolation diode and the cathode of the second isolation diode in the final power module are commonly connected to the load; The control module is used to control the working states of the parallel discharge switch components, the series discharge switch components and the charging tail switch in each power module. The parallel discharge switch components are used to construct a parallel discharge circuit, the series discharge switch components are used to construct a series discharge circuit, and the charging tail switch is used to construct a charging circuit and a load charge release circuit.

2. According to the pulse power supply topology structure of multiple load equipment mixed multiplexing according to claim 1, it is characterized in that: The parallel discharge switch component includes: a thyristor and a diode, the anode of the thyristor is connected to the cathode of the diode, the cathode of the thyristor is connected to the anode of the diode, the anode of the thyristor serves as the anode of the parallel discharge switch component, and the cathode of the thyristor serves as the cathode of the parallel discharge switch component.

3. According to the pulse power supply topology structure of multiple load equipment mixed multiplexing as described in claim 1, it is characterized in that: The series discharge switch component includes: a plurality of transistors, and the plurality of transistors are connected in series.

4. According to the pulse power supply topology structure of multiple load equipment mixed multiplexing as described in claim 1, it is characterized in that: The pulse power supply topology structure also includes a charging module, which includes: a charging power supply, a charging switch and a third isolation diode, the positive electrode of the charging power supply is connected to the first contact of the charging switch, the negative electrode of the charging power supply is grounded, the second contact of the charging switch is connected to the anode of the third isolation diode, and the cathode of the third isolation diode is connected to the anode of the first isolation diode in the primary power supply module.

5. A control method for a pulse power supply topology structure, characterized in that: Applied to the pulse power supply topology structure as claimed in any one of claims 1 to 4, the method comprises: Determining a target operating mode of the pulse power supply topology; Based on the target working mode, the working states of the parallel discharge switch components, the series discharge switch components and the charge tail switch in each power module are controlled.

6. The control method of the pulse power supply topology structure according to claim 5, characterized in that: The controlling the working states of the parallel discharge switch components, the series discharge switch components and the charging tail switch in each power module based on the target working mode includes: When the target working mode is the charging mode, the parallel discharge switch components in each power module are controlled to be in the off state, the series discharge switch components in each power module are controlled to be in the off state, and the charging tail switch in each power module is controlled to be in the on state.

7. The control method of the pulse power supply topology structure according to claim 6, characterized in that: The pulse power supply topology structure further includes a charging module, which includes a charging power supply, a charging switch and a third isolation diode, wherein the positive electrode of the charging power supply is connected to the first contact of the charging switch, the negative electrode of the charging power supply is grounded, the second contact of the charging switch is connected to the anode of the third isolation diode, and the cathode of the third isolation diode is connected to the anode of the first isolation diode in the primary power supply module, and the method further includes: When the target working mode is the charging mode, the charging switch in the charging module is controlled to be in an on state.

8. The control method of the pulse power supply topology structure according to claim 5, characterized in that: The controlling the working states of the parallel discharge switch components, the series discharge switch components and the charging tail switch in each power module based on the target working mode includes: When the target working mode is the series discharge mode, the parallel discharge switch components in each power module are controlled to be in the off state, the series discharge switch components in each power module are controlled to be in the on state, and the charging tail switch in each power module is controlled to be in the off state.

9. The control method of the pulse power supply topology structure according to claim 5, characterized in that: The controlling the working states of the parallel discharge switch components, the series discharge switch components and the charging tail switch in each power module based on the target working mode includes: When the target working mode is the parallel discharge mode, the parallel discharge switch components in each power module are controlled to be in the on state, the series discharge switch components in each power module are controlled to be in the off state, and the charging tail switch in each power module is controlled to be in the off state.

10. The control method of the pulse power supply topology structure according to claim 5, characterized in that: The controlling the working states of the parallel discharge switch components, the series discharge switch components and the charging tail switch in each power module based on the target working mode includes: When the target working mode is the composite power output mode, the parallel discharge switch components in the first m power modules are controlled to be in an off state, the series discharge switch components are controlled to be in an on state, and the charging tail switch is controlled to be in an off state, and the parallel discharge switch components in the remaining nm power modules are controlled to be in an on state, the series discharge switch components are controlled to be in an off state, and the charging tail switch is controlled to be in an off state, where n is the total number of the multiple power modules, and 1≤m <n。

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