Inductance energy storage type pulse power supply and control method

Abstract

The invention discloses an inductive energy storage type pulse power supply and a control method, and belongs to the field of power pulse power supplies. The energy storage module comprises a plurality of inductance energy storage units which are connected in parallel, an inductor in each inductance energy storage unit is used for storing energy, and the countercurrent capacitors are used for generating countercurrent pulses to turn off charging thyristors in the inductance energy storage units; a first fly-wheel diode, which enables the counter current pulse to flow through the first fly-wheel diode to turn off the charging thyristor when the charging thyristor in each inductance energy storage unit is turned off; and when the residual energy of the primary power supply is discharged, the residual energy is transferred to a load through the energy transfer thyristor. According to the invention, the consistency of the turn-off path is realized when the charging thyristor is turned off by the counter-current pulse, the load discharge current is improved, the voltage stress borne by the thyristor when the thyristor is turned off is reduced, and the capacitance and counter-current voltage of the counter-current capacitor are further reduced.

Description

Technical Field

[0001] This invention belongs to the field of pulse power supply technology, and more specifically, relates to an inductive energy storage type pulse power supply topology and its control method. Background Technology

[0002] Pulse power supplies (PPSs) are power supplies capable of delivering megaampere-level pulse currents to a load within milliseconds, and they are widely used in electromagnetic launch technology. Based on different energy storage methods, pulse power supplies can generally be divided into capacitor-based pulse power supplies, rotating machinery-based pulse power supplies, and inductive-based pulse power supplies. Compared to capacitor-based pulse power supplies, inductive-based pulse power supplies have advantages such as higher energy density and simpler structure; and compared to rotating machinery energy storage, inductive energy storage elements, as static energy storage elements, are easier to cool.

[0003] Currently, the circuit topologies of inductive energy storage power supplies are mainly divided into two types: Meat Grinder and XRAM. In the XRAM circuit topology with ICCOS reverse current loop, a reverse current capacitor is used to transfer current and provide reverse voltage to assist the thyristor turn-off in order to improve the turn-off capability of the main circuit switch. However, as the charging current gradually increases, the reverse current energy required for reliable thyristor turn-off also increases, and the voltage stress borne by the thyristor during turn-off also increases accordingly. At the same time, the capacitance and pre-charge voltage of the reverse current capacitor also increase, resulting in a larger size of the reverse current capacitor, thereby reducing the energy storage density of the entire module and also being detrimental to the reliability and safety of circuit operation. Summary of the Invention To address the aforementioned deficiencies or improvement needs of existing technologies, this invention provides an inductive energy storage type pulse power supply. By using a freewheeling diode and an energy transfer thyristor, the load discharge current is increased, and the voltage stress borne by the thyristor when it is turned off is reduced. This further reduces the capacitance and reverse voltage of the reverse capacitor, with the aim of achieving self-charging of the auxiliary capacitor and reducing system integration complexity.

[0004] To achieve the above objectives, according to a first aspect of the present invention, an inductor-based pulse power supply topology is provided, comprising: Primary power source, used to provide electrical energy; An energy storage module, connected in parallel with the primary power supply, includes multiple parallel inductor energy storage units. The inductor in each inductor energy storage unit is used for energy storage. Each stage of the inductor energy storage unit includes four ports. The first terminal of the next stage inductor energy storage unit is connected to the second terminal of the previous stage inductor energy storage unit. The first terminal of the first stage inductor energy storage unit is connected to the anode of the primary power supply. The second terminal of the last stage inductor energy storage unit is connected to the cathode of the primary power supply. The third terminal of each inductor energy storage unit is connected to the first common node of the energy storage module. The fourth terminal of each inductor energy storage unit is connected to the second common node of the energy storage module. The second common node is connected to the positive terminal of the primary power supply. A reverse current capacitor, the anode of which is connected to the first common node of the energy storage module, is used to generate a reverse current pulse to turn off the charging thyristor in the inductive energy storage unit; The first freewheeling diode is connected in antiparallel with the primary power supply, so that when the charging thyristor in each inductor energy storage unit is turned off, the reverse pulse flows through the first freewheeling diode to turn off the charging thyristor. An energy transfer thyristor is provided, wherein the anode of the energy thyristor is connected to the load and the cathode is connected to the negative terminal of the primary power supply. When the primary power supply discharges its remaining energy, the remaining energy is transferred to the load through the energy transfer thyristor.

[0005] The present invention also discloses a method for controlling the above-mentioned inductive energy storage type pulse power supply, comprising: The charging thyristor in the energy storage module is turned on, and the primary power supply charges the energy storage inductor in the energy storage module. When the energy of the energy storage inductor reaches a preset value, the load thyristor is turned on and the reverse capacitor turns off the charging thyristor in the energy storage module. The energy transfer thyristor is turned on, and the remaining electrical energy of the primary power supply is provided to the load.

[0006] Furthermore, the charging thyristor in the energy storage module is disconnected, and the energy storage inductor in the energy storage module discharges to the load.

[0007] In summary, the above-described technical solutions conceived in this invention can achieve the following beneficial effects: (1) The inductor energy storage pulse power supply topology designed in this embodiment of the invention is achieved by connecting a freewheeling diode in antiparallel across the primary power supply and adding an energy transfer thyristor between the primary power supply and the load, so that the turn-off circuits of each charging thyristor are basically the same. The remaining energy of the primary power supply is transferred to the load side during discharge, which increases the load discharge current and reduces the voltage stress borne by the thyristor when it is turned off, further reducing the capacitance of the reverse capacitor and the reverse voltage.

[0008] (2) Furthermore, the power supply structure designed in this invention has the function of multi-level expansion of XRAM topology circuit. In practical applications, a suitable value of n can be selected according to the actual load current requirements.

[0009] (3) Further, the primary power supply is a constant voltage source; or the primary power supply is a primary capacitor, and the capacitance value of the primary capacitor is greater than the capacitance value of the reverse current capacitor.

[0010] (4) Furthermore, the inductance of the inductors in the multi-level energy storage module is equal, which is beneficial to the synchronicity of the turn-off of the charging thyristors and can effectively improve the load discharge current.

[0011] (5) Furthermore, the freewheeling diode connected in antiparallel across the primary power supply provides a discharge circuit for the reverse capacitor to turn off the charging thyristor, so that the turn-off of the charging thyristor is always through the freewheeling diode, ensuring the consistency of the turn-off circuit of each charging thyristor.

[0012] (6) Preferably, thyristor T1, thyristor T2, thyristor T3 and thyristor T n Selecting a fast recovery thyristor with a turn-on and turn-off time in the microsecond range can ensure the stability of thyristors T1, T2, T3, and T4. n Reliable shutdown.

[0013] In summary, the inductor-based pulse power supply of this invention achieves synchronous operation of each charging thyristor during reverse current turn-off, and fully utilizes the remaining energy of the primary power supply to transfer it to the load. This effectively reduces the thyristor switching voltage stress and the reverse current capacitor energy, increases the load discharge current, and thus improves the energy storage density of the pulse power supply. Attached Figure Description

[0014] Figure 1 This is the topology of the inductor-based pulse power supply provided in this embodiment of the invention.

[0015] Figure 2 This is a waveform diagram of the load current during the charging and discharging process of the inductive energy storage pulse power supply in an embodiment of the present invention.

[0016] Figure 3 This is a current waveform diagram of the energy transfer thyristor of the inductive energy storage type pulse power supply in an embodiment of the present invention.

[0017] Figure 4 The freewheeling diode D in the inductor-type pulse power supply of this embodiment of the invention. S The current waveform diagram. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention. Furthermore, the technical features involved in the various embodiments of this invention described below can be combined with each other as long as they do not conflict with each other.

[0019] In this invention, the terms "first," "second," etc., used in the invention and accompanying drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence.

[0020] Example 1 like Figure 1 As shown, the topology of the inductor-based pulse power supply in this embodiment of the invention includes: Primary power supply U S Energy storage module, reverse capacitor C0, freewheeling diode D S D0, energy transfer thyristor T0, load thyristor T L and controller ( Figure 1 (Not shown in the image).

[0021] Furthermore, the energy storage module includes multiple parallel-connected inductive energy storage units, such as... Figure 1 As shown, each inductor energy storage unit includes a charging thyristor, an energy storage inductor, an upper arm diode, and a lower arm diode.

[0022] Specifically, such as Figure 1 Taking the component connection relationship in the first inductor energy storage unit as an example, the first inductor energy storage unit includes a charging thyristor T1, an energy storage inductor L1, and an upper arm diode D. 11 and lower arm diode D 12 The anode of the charging thyristor T1 is called the first terminal of the first inductor energy storage unit. The cathode of the thyristor T1 is connected to the energy storage inductor L1, and the connected node is connected to the upper arm diode D. 11 The cathodes are connected, and the upper arm diode D... 11 The anode of the energy storage module is connected to the first common node n, and one end of the energy storage inductor L1 is connected to the upper arm diode D. 11 The cathode, the other end of the energy storage inductor L1 is connected to the lower arm diode D. 12 The anode is connected, and the lower arm diode D 12 The cathode of the energy storage module is connected to the second common node m, and the energy storage inductor L1 is connected to the lower arm diode D. 12 The connection point is called the second terminal of the first inductor energy storage unit. For example... Figure 1It can be seen that the connection methods between the charging thyristor, energy storage inductor, upper arm diode, and lower arm diode in each inductor energy storage unit are the same. The connection of each component is referred to the description in the first inductor energy storage unit, and will not be described in detail for the sake of brevity. In each inductor energy storage unit, the anode of the upper arm diode is connected to the first common node n, and the cathode of the lower arm diode is connected to the second common node m. The first terminal of the next stage inductor energy storage unit is connected to the second terminal of the previous stage inductor energy storage unit, and so on. The first terminal of the first stage inductor energy storage unit is connected to the primary power supply U. S The anode is connected to the primary power supply U, and so on until the second terminal of the last stage inductor energy storage unit is connected to the primary power supply U. S The cathode is connected. For example... Figure 1 As shown, a1, a2...an are the first terminals of the first-stage inductor energy storage unit, the second-stage inductor energy storage unit...the nth-stage inductor energy storage unit, respectively, and b1, b2...bn are the second terminals of the first-stage inductor energy storage unit, the second-stage inductor energy storage unit...the nth-stage inductor energy storage unit, respectively.

[0023] Furthermore, the upper arm diode D in the inductive energy storage unit 11 ---D n1 Lower arm diode D 12 ---D n2 With load R L and L L , load thyristor T L The combination of reverse capacitor C0 and freewheeling diode D0 is also known as a load current discharge module. In other words, the upper and lower arm diodes are used to turn on the load thyristor T when the energy storage inductor reaches a preset current value. L The energy transfer thyristor T0 is used to transfer energy through the load thyristor T0 to the reverse capacitor C0. L Simultaneously triggering discharge and conduction, the primary power supply U... S The remaining energy is transferred to the load R L and L L Above. The anode of the energy transfer thyristor T0 and the load thyristor T. L And one end of the load is connected, the cathode of the energy transfer thyristor T0 is connected to the primary power supply U. S The negative terminal of the capacitor is connected, and the reverse current capacitor C0 and the freewheeling diode D0 are connected in parallel. One end of the parallel connection is connected to the first common node of the energy storage unit. The positive terminal of the reverse current capacitor C0 is connected to the cathode of the freewheeling diode D0, and the negative terminal of the reverse current capacitor C0 is connected to the anode of the freewheeling diode D0. The other end of the parallel connection is connected to the load thyristor T. L Connected, load thyristor T L The other end is connected to the load resistor R L At the connection point with the energy transfer thyristor T0, the load inductance L L With load resistance RL After being connected in series, one end is connected to the anode of the energy transfer thyristor T0, and the other end is connected to the second common node of the energy storage module, and the freewheeling diode D. S The anode is connected to the primary power supply U. S The negative terminal, freewheeling diode D S The cathode is connected to the second common node of the energy storage module.

[0024] It should be noted that the charging thyristors in the inductor-type pulse power supply of the present invention are controlled by a controller. The controller is used to trigger the charging thyristors T1, T2, T3, ..., T when the primary power supply charges the energy storage inductor. n Conduction, and in L1 to L n When the charge reaches the preset value, the controller triggers the load thyristor T. L When the circuit is turned on, the reverse capacitor C0 discharges, generating a reverse current, which in turn causes the charging thyristors T1, T2, T3, ..., T to conduct. n The current is reduced below the minimum current required to keep the thyristor on, thereby turning it off; the controller is also used to reduce the current in the energy storage inductors L1 to L... n Triggered during discharge T0, T L Turn on, load thyristor T L After being turned on, the primary power supply U S The remaining energy is transferred to the load R L and L L superior.

[0025] The reverse capacitor C0 is used to generate a reverse current to charge the thyristors T1, T2, T3, ..., T n Turn off, thus each stage of energy storage inductor L i Through D i1 and D i2 For load R L and L L Discharge occurs, load R L and L L A pulse current is generated on it.

[0026] Furthermore, the energy transfer thyristor T0 is used to control the flow of the reverse current capacitor C0 through the load thyristor T0. L The discharge is triggered and the circuit is turned on simultaneously, thus enabling the primary power supply U... S The remaining energy is transferred to the load R L and L L superior.

[0027] By controlling the charging thyristor, load thyristor, and energy transfer thyristor, the primary power supply U is converted into a voltage source. SThe remaining electrical energy is transferred to the load side, which increases the load discharge current and reduces the voltage stress that the thyristor bears when it is turned off, further reducing the capacitance and reverse voltage of the reverse capacitor.

[0028] To better understand the working process of the inductor-based energy storage pulse power supply, the following will use a pulse power supply with a 4-stage energy storage inductor structure to describe the working process of each component during the charging and discharging process of the pulse power supply in this invention.

[0029] The following example, with n=4, further illustrates the inductor-based pulse power supply of this invention. When n=4, the energy storage module includes four inductors, L1, L2, L3, and L4, which form a four-stage charging inductor. The inductors L1, L2, L3, and L4 are connected in series with the same terminal, and the inductance values ​​of the inductors L1, L2, L3, and L4 are all equal.

[0030] The load current discharge module is used to turn on the load thyristor T when the energy storage inductors L1 to L4 reach the pre-charge current value. L The reverse capacitor C0 generates a reverse current, which turns off the charging thyristors T1, T2, T3, and T4, thereby turning off the energy storage inductor L at each stage. i Through D i1 and D i2 For load R L and L L Discharge occurs, thereby generating a pulse current on the load. In this embodiment of the invention, the load current discharge module includes a load R. L and L L , load thyristor T L Reverse capacitor C0, freewheeling diode D0, and diode D corresponding to L1. 11 and diode D 12 The diode D corresponding to L2 21 and diode D 22 The diode D corresponding to L3 31 and diode D 32 And the diode D corresponding to L4 41 and diode D 42 .

[0031] Primary power supply U S The positive terminal is connected to the anode of the charging thyristor T1 and the low-voltage terminal of the load, and the cathode of the charging thyristor T1 and the upper arm diode D are connected. 11 The cathodes of both are connected to one end of the energy storage inductor L1, and the other end of L1 is connected to the lower arm diode D. 12 The anode of the charging thyristor T2 is connected to the anode of the charging thyristor T2; the cathode of the charging thyristor T2 and the upper arm diode D are connected to the anode of the charging thyristor T2. 21 The cathodes of both are connected to one end of L2, and the other end of L2 is connected to D.22 The anode of the charging thyristor T3 and the anode connection of the charging thyristor T3 are shown; the cathode of the charging thyristor T3 and the D are also shown. 31 The cathodes of all are connected to one end of L3, and the other end of L3 is connected to D. 32 The anode of the thyristor T4 and the anode connection of the charging thyristor T4 in the last stage charging circuit; the cathode of the charging thyristor T4 and the D 41 The cathodes of all are connected to one end of L4, and the other end of L4 is connected to D. 42 anode and primary power supply U S The negative terminal connection; load thyristor T L The anode is used to connect to one end of the load; the load thyristor T L The cathode of the capacitor is connected to the negative terminal of the reverse capacitor C0 and the anode of the freewheeling diode D0; the freewheeling diode D... S anode and primary power supply U S The negative terminal is connected to the freewheeling diode D. S Cathode and primary power supply U S The anode of the energy transfer thyristor T0 is connected to the load thyristor T. L And one end of the load is connected, the cathode of the energy transfer thyristor T0 is connected to the primary power supply U. S The negative terminal is connected. In this embodiment of the invention, the load includes an inductor L connected in series. L and resistance R L .

[0032] The controller triggers charging thyristors T1, T2, T3, and T4 to conduct, and the energy storage inductors enter the charging state. When the energy storage inductors L1 to L4 are charged to the preset value, the controller triggers the load thyristor T... L And when the energy transfer thyristor T0 is turned on, the power supply enters the commutation stage, that is, the reverse current pulse generated by the reverse current capacitor C0 turns off the charging thyristors T1, T2, T3, and T4.

[0033] Specifically, when the controller triggers thyristors T1, T2, T3, and T4 to conduct, the primary power supply U... S Through U S -T1-L1-T2-L2-T3-L3-T4-L4-U S The circuit charges the energy storage inductors L1, L2, L3, and L4; when the charging current reaches the preset value, the controller triggers the load thyristor T. L When the circuit is open, the reverse capacitor C0 flows through C0-D. 11 -T1-D S -L L -R L -T L - The C0 circuit generates a reverse current pulse, causing thyristor T1 to withstand reverse voltage for a period of time and automatically turn off; the reverse current capacitor C0 passes through C0-D21 -T2-D 12 -L L -R L -T L - The C0 circuit generates a reverse current pulse, causing thyristor T2 to withstand reverse voltage for a period of time and automatically turn off; the reverse current capacitor C0 passes through C0-D 31 -T3-D 22 -L L -R L -T L - The C0 circuit generates a reverse current pulse, causing thyristor T3 to withstand reverse voltage for a period of time and automatically turn off; the reverse current capacitor C0 passes through C0-D 41 -T4-D 32 -L L -R L -T L - The C0 circuit generates a reverse current pulse, causing thyristor T4 to withstand reverse voltage for a period of time and automatically turn off; that is, through the primary power supply U S The two ends of the freewheeling diode D are connected in antiparallel. S and in the primary power supply U S An energy transfer thyristor T0 is added between the power supply and the load to ensure that the turn-off circuits of each charging thyristor are consistent, and the primary power supply U S The remaining energy is transferred to the load side during discharge, which increases the load discharge current and reduces the voltage stress that the thyristor bears when it is turned off, further reducing the capacitance and reverse voltage of the reverse capacitor.

[0034] Furthermore, the controller triggers the load thyristor T. L Simultaneously, the energy transfer thyristor T0 is triggered to turn on, and the primary power supply U... S After the fourth-level inductor is fully charged, the remaining energy is channeled through U... S -L L -R L -T0-U S The circuit discharges to the load, and the power supply enters the energy transfer stage, which can increase the peak value of the load current.

[0035] When the primary power supply U S Once the remaining electrical energy has been released, the charging thyristor is in the off state, the energy storage inductor discharges to the load, and the power supply enters the discharge phase.

[0036] like Figures 2-4 As shown, they correspond to respectively Figure 1 The diagram shows the load current waveform of the inductive energy storage pulse power supply during a single charge and discharge process, and the freewheeling diode D. S The current waveform diagrams for the inductor and the energy transfer thyristor T0 are shown. The operation of this inductor-based pulse power supply can be divided into the following four stages.

[0037] (1) Inductor charging stage After the controller triggers thyristors T1, T2, T3, and T4 to conduct, the primary power supply U... S Through U S -T1-L1-T2-L2-T3-L3-T4-L4-U S The circuit charges the energy storage inductors L1, L2, L3, and L4; At this time, due to the load thyristor T L Not conducting; no current in the load circuit.

[0038] (2) Converter stage When the energy storage inductors L1, L2, L3, and L4 are charged to the preset value, the controller triggers the thyristor T. L Conduction. Reverse capacitor C0 flows through C0-D. 11 -T1-D S -L L -R L -T L - The C0 circuit generates a reverse current pulse, causing thyristor T1 to withstand reverse voltage for a period of time and automatically turn off; the reverse current capacitor C0 passes through C0-D 21 -T2-D 12 -L L -R L -T L - The C0 circuit generates a reverse current pulse, causing thyristor T2 to withstand reverse voltage for a period of time and automatically turn off; the reverse current capacitor C0 passes through C0-D 31 -T3-D 22 -L L -R L -T L - The C0 circuit generates a reverse current pulse, causing thyristor T3 to withstand reverse voltage for a period of time and automatically turn off; the reverse current capacitor C0 passes through C0-D 41 -T4-D 32 -L L -R L -T L - The C0 circuit generates a reverse current pulse, causing thyristor T4 to withstand reverse voltage for a period of time and automatically turn off; due to diode D 11 D 12 D 21 D 22 D 31 D 32 D 41 D 42 With the presence of [something], no current flows through the load, and the load current is zero.

[0039] (3) Energy transfer stage The controller triggers the thyristor T. L Simultaneously, the energy transfer thyristor T0 is triggered to turn on, and the primary power supply U... S The remaining energy after the fourth-level inductor is fully charged is transmitted through U... S -L L -R L -T0-U S The circuit discharges to the load.

[0040] (4) Energy storage inductor discharge stage After the charging thyristors T1, T2, T3, and T4 automatically turn off under reverse voltage for a period of time, the energy in the energy storage inductor L1 is transferred through L1-D. 12 -L L -R L -T L -D0-D 11 - The L1 circuit discharges to the load; the energy of the energy storage inductor L2 is distributed through L2-D2-L L -R L -T L -D0-D 21 -L2 discharges the load; the energy in the energy storage inductor L3 is channeled through L1-D. 32 -L L -R L -T L -D0-D 31 -L3 discharges the load; the energy in the energy storage inductor L4 is channeled through L4-D. 42 -L L -R L -T L -D0-D 41 - The L4 circuit discharges the load; the load discharge current I Load It is the sum of the discharge currents of the energy storage inductors L1, L2, L3, and L4. If the energy storage module includes n inductor energy storage units connected in series, the energy storage inductor L in the n inductor energy storage units is... i Each through its corresponding loop L i -D i2 -L L -R L -T L -D0-D i1 -L i Discharging allows for the realization of n energy storage inductors L i The parallel discharge circuit enables parallel discharge to the load, with a load current I. Load There are n energy storage inductors L i The sum of discharge currents.

[0041] As can be seen, the inductor-based pulse power supply in this embodiment of the invention ensures the consistency of its charging thyristor turn-off circuit, while fully utilizing the primary power supply U S The remaining energy after the energy storage inductor is fully charged reduces the voltage stress on the charging thyristor when it is turned off, and increases the load current.

[0042] Specifically, the inductance of energy storage inductors L1, L2, L3, and L4 is all equal. The inductance values ​​of energy storage inductors L1, L2, L3, and L4 can be calculated based on the expected charging current.

[0043] Primary power supply U S When using a storage capacitor, the capacitance value should be determined based on the actual situation and the charging current. Based on the estimated energy required by the load and the overall power supply efficiency, and considering the safe voltage level, the initial capacitance value is calculated using the capacitor energy formula. Then, considering the discharge current, pulse width, charging time, voltage, etc., the capacitance U is iteratively calculated. S The capacitance value of the reverse capacitor C0 should be selected to ensure that the capacitance values ​​of thyristors T1, T2, and T3 are sufficient. n It can be reliably turned off, and its capacitance value can be determined through simulation.

[0044] To ensure that thyristors T1, T2, T3 to T n Reliable turn-off, thyristor T1, thyristor T2, thyristor T3 and thyristor T n Select a fast recovery thyristor with a turn-on and turn-off time in the microsecond range. Load thyristor T L A pulse thyristor is selected for the energy transfer thyristor T0. The current-carrying capacity and voltage withstand capability of each thyristor should both exceed the maximum possible current and the maximum possible voltage. Specific values ​​can be determined through simulation analysis.

[0045] Through the primary power supply U S Anti-parallel freewheeling diode D S Meanwhile, in the primary power supply U S Adding an energy transfer thyristor T0 between the primary power supply and the load ensures that the turn-off circuits of each charging thyristor are consistent. The remaining energy of the primary power supply is transferred to the load side during discharge, which increases the load discharge current and reduces the voltage stress borne by the thyristor when it is turned off. This further reduces the capacitance of the reverse capacitor and the reverse voltage.

[0046] Figure 2 This is a waveform diagram of the load current during the charging and discharging process of an inductive energy storage pulse power supply. (From...) Figure 2 It can be seen that the appearance of a pulse current waveform on the load indicates that the reverse current capacitor normally turns off the charging thyristor and the energy storage inductor is normally charging and discharging.

[0047] Figure 3 This is a current waveform diagram of the energy transfer thyristor in an embodiment of the inductive energy storage pulse power supply of the present invention. Figure 3 It can be seen that the residual energy on the primary power supply is transferred to the load through the energy transfer thyristor T0 branch, and the current value is much smaller than the thyristor's limit current carrying capacity, indicating that the energy transfer branch can work normally.

[0048] Figure 4 The freewheeling diode D in the inductor-type pulse power supply of this embodiment of the invention. S The current waveform diagram is shown. As can be seen from the diagram, the current through the freewheeling diode Ds is within its current carrying capacity, indicating that the freewheeling circuit can work normally.

[0049] Example 2: This invention also provides a control method for an inductive energy storage type pulse power supply. This control method is used to execute the control process of the aforementioned inductive energy storage type pulse power supply, including: The charging thyristors T1, T2, T3 to T in the energy storage module are turned on. n The primary power supply is the energy storage inductors L1 to L2 in the energy storage module. n Charge; When the energy storage inductors L1 to L n Once the electrical energy reaches the preset value, the load thyristor is turned on, and the reverse capacitor turns off the charging thyristor in the energy storage module. The thyristor is turned on to transfer energy; the remaining electrical energy from the primary power supply is supplied to the load.

[0050] Furthermore, it also includes controlling the discharge process of the energy storage inductor, disconnecting the charging thyristor in the energy storage module, and allowing the energy storage inductor in the energy storage module to discharge to the load. The discharge process of the energy storage inductor is described in Example 1, and will not be detailed further for the sake of brevity.

[0051] The inductive pulse power supply of the present invention has the advantages of high energy efficiency, high energy storage density, high peak load current, low switching stress, low reverse capacitor energy, modular circuit, and strong repeatability.

[0052] Those skilled in the art will readily understand that the above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. An inductive energy storage type pulse power supply, characterized in that, include: Primary power source, used to provide electrical energy; An energy storage module, connected in parallel with the primary power supply, includes multiple parallel inductor energy storage units. The inductor in each inductor energy storage unit is used for energy storage. Each stage of the inductor energy storage unit includes four ports. The first terminal of the next stage inductor energy storage unit is connected to the second terminal of the previous stage inductor energy storage unit. The first terminal of the first stage inductor energy storage unit is connected to the anode of the primary power supply. The second terminal of the last stage inductor energy storage unit is connected to the cathode of the primary power supply. The third terminal of each inductor energy storage unit is connected to the first common node of the energy storage module. The fourth terminal of each inductor energy storage unit is connected to the second common node of the energy storage module. The second common node is connected to the positive terminal of the primary power supply. A reverse current capacitor, the anode of which is connected to the first common node of the energy storage module, is used to generate a reverse current pulse to turn off the charging thyristor in the inductive energy storage unit; The first freewheeling diode is connected in antiparallel with the primary power supply, so that when the charging thyristor in each inductor energy storage unit is turned off, the reverse pulse flows through the first freewheeling diode to turn off the charging thyristor. An energy transfer thyristor is provided, wherein the anode of the energy transfer thyristor is connected to the load and the cathode is connected to the negative terminal of the primary power supply. When the primary power supply discharges its remaining energy, the remaining energy is transferred to the load through the energy transfer thyristor.

2. The inductive energy storage type pulse power supply according to claim 1, characterized in that, The inductive energy storage unit further includes: an energy storage inductor, an upper arm diode, and a lower arm diode. The anode of the charging thyristor is the first terminal of the inductive energy storage unit. One end of the charging thyristor is connected to the cathode of the charging thyristor, and the connected node is connected to the cathode of the upper arm diode. The anode of the upper arm diode is connected to the first common node of the energy storage module. One end of the energy storage inductor is connected to the cathode of the upper arm diode, and the other end of the energy storage inductor is connected to the anode of the lower arm diode. The cathode of the lower arm diode is connected to the second common node of the energy storage module. The connection point between the energy storage inductor and the lower arm diode is the second terminal of the inductive energy storage unit.

3. The inductive energy storage type pulse power supply according to claim 1, characterized in that, It also includes a second freewheeling diode, which is connected in parallel with the reverse capacitor, wherein the anode of the second freewheeling diode is connected to the cathode of the reverse capacitor, and the cathode is connected to the anode of the reverse capacitor.

4. The inductive energy storage type pulse power supply according to claim 3, characterized in that, It also includes a load thyristor connected between the reverse capacitor and the load, wherein the anode of the load thyristor is connected to the load and the cathode is connected to the cathode of the reverse capacitor, and the load is connected between the anode of the load thyristor and the second common node of the energy storage module.

5. The inductive energy storage type pulse power supply according to claim 4, characterized in that, The inductor-based pulse power supply includes four operating stages, specifically: First stage: The primary power supply charges the inductors in the inductor energy storage unit. The charging thyristor in each inductor energy storage unit is turned on, and the energy storage inductors in the inductor energy storage unit are connected in series. The primary power supply charges the series-connected energy storage inductors. Second stage: When the energy storage inductor is charged to a preset value, the load thyristor is turned on, and the reverse current pulse generated by the reverse current capacitor turns off the charging thyristor in each inductor energy storage unit. The turn-off path of the charging thyristor in the i-th stage inductor energy storage unit in the reverse current capacitor is as follows: the anode of the reverse current capacitor passes through the upper arm diode in the i-th stage inductor energy storage unit, the charging thyristor in the i-th stage inductor energy storage unit, the first freewheeling diode, the load, the load thyristor, and the cathode of the reverse current capacitor, thus turning off the charging thyristor in the i-th stage inductor energy storage unit, where the value of i ranges from 1 to n. Third stage: Transfer of residual energy from primary power supply. When the charging thyristor in each inductor energy storage unit is turned off, the load thyristor and the energy transfer thyristor are turned on, and the residual energy in the primary power supply flows through the energy transfer thyristor to discharge the load. Fourth stage: Energy storage inductor discharge stage. The charging thyristor is disconnected, and the current on the energy storage inductor in the i-th stage inductor energy storage unit is discharged to the load through the loop formed by the energy storage inductor, lower arm diode, load, load thyristor, second freewheeling diode, upper arm diode, and inductor, where i takes the value range of 1-n.

6. The inductive energy storage type pulse power supply according to claim 5, characterized in that, It also includes a controller, which is used to trigger the conduction of the charging thyristor, the load thyristor, and the energy transfer thyristor.

7. The inductive energy storage type pulse power supply according to claim 5, characterized in that, This also includes the fact that the inductance value of each energy storage inductor in the energy storage module is equal.

8. The inductive energy storage type pulse power supply according to claim 6, characterized in that, The on and off time of the charging thyristor is in the microsecond range.

9. A method for controlling the inductive energy storage type pulse power supply according to claims 1-8, comprising: The charging thyristor in the energy storage module is turned on, and the primary power supply charges the energy storage inductor in the energy storage module. When the energy of the energy storage inductor reaches a preset value, the load thyristor is turned on and the reverse capacitor turns off the charging thyristor in the energy storage module. The energy transfer thyristor is turned on, and the remaining electrical energy of the primary power supply is provided to the load.

10. The method for controlling the inductive energy storage type pulse power supply according to claim 9, further comprising: Disconnect the charging thyristor in the energy storage module, and the energy storage inductor in the energy storage module discharges to the load.

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