A step-up / down voltage device and step-up / down voltage method for high power pulse power supply system

Abstract

The invention discloses a step-up and step-down device applied to a high-power pulse power supply system, comprising an energy storage inductor module, an energy storage capacitor, a first unidirectional rectifier module, a second unidirectional rectifier module, a first switch module and a second switch module; the first end of the first switch module is connected to a voltage input end, and the second end, the third end and the fourth end are connected to the energy storage inductor module and the first unidirectional rectifier module; the voltage output end is grounded through the energy storage capacitor; the first end of the second unidirectional rectifier module is connected to the voltage output end, and the second end, the third end and the fourth end are connected to the energy storage inductor module and the second switch module; the first switch module and the second switch module are used to be turned on or off according to a signal from a control end; the first unidirectional rectifier module and the second unidirectional rectifier module are used to limit a current direction, and a corresponding step-up and step-down method is also disclosed. The circuit cost of the invention is low, and the input voltage can be stepped up or stepped down, which has good promotion value.

Description

Technical Field

[0001] This patent relates to the field of power electronics technology, specifically a step-up and step-down device and step-up and step-down method used in high-power pulse power supply systems. Background Art

[0002] In the high-power pulse power supply system, the input voltage range of the buck-boost device is 960V~1402V, and the output voltage is required to rise to 1800V in a short time, and then stabilize at about 800V, during which the current remains stable. Therefore, when the input voltage is higher than the output voltage, the input voltage needs to be stepped down; and when the input voltage is lower than the output voltage, the input voltage needs to be stepped up. In order to achieve the normal power supply of the energy storage device to the system, a buck-boost circuit is usually provided between the energy storage device and the load, which can step up or down the input voltage to obtain the output voltage required by the load.

[0003] At present, the existing buck-boost circuit is usually connected between the energy storage device and the load after the boost circuit and the buck circuit are connected in series. The boost circuit is a combination of a boost chip and discrete devices, while the buck circuit is a combination of a buck chip and discrete devices. Therefore, in order to achieve the buck-boost of the input voltage, a variety of voltage adjustment chips are needed, the circuit structure is very complex, and the circuit production cost is high. Summary of the invention

[0004] The present invention aims to solve the problem that the existing high-power pulse power supply system needs to use a variety of voltage adjustment chips to achieve input voltage step-up and step-down, the circuit structure is very complex, and the circuit production cost is high.

[0005] In view of the above problems, the technical solution adopted by the present invention is: a step-up and step-down device applied to a high-power pulse power supply system, characterized in that it includes an energy storage inductor module, an energy storage capacitor, a first unidirectional rectifier module, a second unidirectional rectifier module, a first switch module and a second switch module;

[0006] The first end of the first switch module is connected to the voltage input end, the second end of the first switch module is connected to the first end of the energy storage inductor module, the third end of the first switch module is connected to the second end of the energy storage inductor module, the fourth end of the first switch module is connected to the third end of the energy storage inductor module, the first end of the first unidirectional rectifier module is grounded, the second end of the first unidirectional rectifier module is connected to the first end of the energy storage inductor module, the third end of the first unidirectional rectifier module is connected to the second end of the energy storage inductor module, the fourth end of the first unidirectional rectifier module is connected to the third end of the energy storage inductor module, and the fourth end of the energy storage inductor module is connected to the ground. The second end of the second unidirectional rectifier module is connected, the fifth end of the energy storage inductor module is connected to the third end of the second unidirectional rectifier module, the sixth end of the energy storage inductor module is connected to the fourth end of the second unidirectional rectifier module, the first end of the second unidirectional rectifier module is grounded through the energy storage capacitor, the first end of the second switch module is grounded, the second end of the second switch module is connected to the fourth end of the energy storage inductor module, the third end of the second switch module is connected to the fifth end of the energy storage inductor module, the fourth end of the second switch module is connected to the sixth end of the energy storage inductor module, and the first end of the second unidirectional rectifier module is also connected to the voltage output end;

[0007] The first unidirectional rectifier module is used to limit the current direction to from the input end of the first unidirectional rectifier module to the output end of the first unidirectional rectifier module;

[0008] The second unidirectional rectifier module is used to limit the current direction to from the input end of the second unidirectional rectifier module to the output end of the second unidirectional rectifier module;

[0009] The first end of the energy storage capacitor is connected to the voltage output end, and the second end of the energy storage capacitor is grounded;

[0010] The first switch module and the second switch module also include a control end. When the pulse current is in the pulse rising stage, the first switch module and the second switch module are turned on; when the pulse current is in the decline and pulse gap, the first switch module and the second switch module are turned off, and the first unidirectional rectifier module and the second unidirectional rectifier module are freewheeling.

[0011] Further, the energy storage inductor module includes a first energy storage inductor, a second energy storage inductor and a third energy storage inductor, the first end of the first energy storage inductor is connected to the second end of the first switch module, the second end of the first energy storage inductor is connected to the fourth end of the second unidirectional rectifier module, the first end of the second energy storage inductor is connected to the third end of the first switch module, the second end of the second energy storage inductor is connected to the third end of the second unidirectional rectifier module, the first end of the third energy storage inductor is connected to the fourth end of the first switch module, and the second end of the third energy storage inductor is connected to the second end of the second unidirectional rectifier module.

[0012] Furthermore, the first unidirectional rectifier module includes a first diode, a second diode and a third diode, the positive electrode of the first diode is grounded, the negative electrode of the first diode is connected to the first end of the first energy storage inductor, the positive electrode of the second diode is grounded, the negative electrode of the second diode is connected to the first end of the second energy storage inductor, the positive electrode of the third diode is grounded, and the negative electrode of the third diode is connected to the first end of the third energy storage inductor.

[0013] Furthermore, the second unidirectional rectifier module includes a fourth diode, a fifth diode and a sixth diode, the anode of the fourth diode is connected to the second end of the first energy storage inductor, the cathode of the fourth diode is connected to the voltage output end, the anode of the fifth diode is connected to the second end of the second energy storage inductor, the cathode of the fifth diode is connected to the voltage output end, the anode of the sixth diode is connected to the second end of the third energy storage inductor, and the cathode of the sixth diode is connected to the voltage output end.

[0014] Furthermore, the first switch module includes a first switch tube, a second switch tube and a third switch tube, the first end of the first switch tube is connected to the voltage input end, the second end of the first switch tube is connected to the first end of the first energy storage inductor, the first end of the second switch tube is connected to the voltage input end, the second end of the second switch tube is connected to the first end of the second energy storage inductor, the first end of the third switch tube is connected to the voltage input end, and the second end of the third switch tube is connected to the first end of the third energy storage inductor.

[0015] Furthermore, the second switch module includes a fourth switch tube, a fifth switch tube and a sixth switch tube, the first end of the fourth switch tube is connected to the second end of the first energy storage inductor, the second end of the fourth switch tube is grounded, the first end of the fifth switch tube is connected to the second end of the second energy storage inductor, the second end of the fifth switch tube is grounded, the first end of the sixth switch tube is connected to the second end of the third energy storage inductor, and the second end of the sixth switch tube is grounded.

[0016] Further, the first switch tube, the second switch tube, the third switch tube, the fourth switch tube, the fifth switch tube and the sixth switch tube are all MOS tubes, the drain of the first switch tube is connected to the voltage input terminal, the source of the first switch tube is connected to the first end of the first energy storage inductor, the gate of the first switch tube is connected to the control terminal, the drain of the second switch tube is connected to the voltage input terminal, the source of the second switch tube is connected to the first end of the second energy storage inductor, the gate of the second switch tube is connected to the control terminal, the drain of the third switch tube is connected to the voltage input terminal, and the third The source of the switching tube is connected to the first end of the third energy storage inductor, the gate of the third switching tube is connected to the control end, the drain of the fourth switching tube is connected to the second end of the first energy storage inductor, the source of the fourth switching tube is grounded, the gate of the fourth switching tube is connected to the control end, the drain of the fifth switching tube is connected to the second end of the second energy storage inductor, the source of the fifth switching tube is grounded, the gate of the fifth switching tube is connected to the control end, the drain of the sixth switching tube is connected to the second end of the third energy storage inductor, the source of the sixth switching tube is grounded, and the gate of the sixth switching tube is connected to the control end.

[0017] Furthermore, the buck-boost device applied to the high-power pulse power supply system includes a power module, a buck-boost circuit and a load connected in sequence, and the buck-boost circuit is configured as the above-mentioned buck-boost circuit.

[0018] The invention also relates to a step-up / down method of a step-up / down device applied to a high-power pulse power supply system: during the charging process of the energy storage inductor module, the fourth end, the fifth end and the sixth end of the energy storage inductor module are grounded through the second switch module, the input end of the first unidirectional rectifier module is at a low level and the output end is at a high level, and the first unidirectional rectifier module is equivalent to being cut off, the input end of the second unidirectional rectifier module is at a low level and the output end is at a high level, and the second unidirectional rectifier module is equivalent to being cut off; the input voltage at the voltage input end flows into the ground through the first switch module, the energy storage inductor module and the second switch module, and in the current loop, the current on the energy storage inductor module continuously rises to a maximum value, thereby realizing energy storage charging of the energy storage inductor module;

[0019] During the discharge process of the energy storage inductor module, the first end, the second end and the third end of the energy storage inductor module no longer have input voltage, and the current on the energy storage inductor module begins to decrease. In order to suppress the current reduction, the energy storage inductor module releases the stored energy; at this time, due to the discharge of the energy storage inductor module, the fourth end, the fifth end and the sixth end of the energy storage inductor module are at a high level, and the first end, the second end and the third end are at a low level, then the first unidirectional rectifier module and the second unidirectional rectifier module are turned on, the first switch module and the second switch module are turned off, the current direction is from the input end to the output end of the first unidirectional rectifier module and the second unidirectional rectifier module, and the current loop is the earth - the first unidirectional rectifier module - the energy storage inductor module - the second unidirectional rectifier module - the energy storage capacitor C - the earth; during the discharge process of the energy storage inductor module, the energy stored in the energy storage inductor module can be transferred to the energy storage capacitor C, so that the voltage across the energy storage capacitor C continues to increase to exceed the input voltage, thereby achieving input voltage boost;

[0020] After the discharge process of the energy storage inductor module is finished, the energy storage inductor module enters the charging process. During the charging process of the energy storage inductor module, the energy storage capacitor C can supply power to the load through the energy transmitted by the energy storage inductor module during the discharge process.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] (1) The step-up / down voltage device applied to the high-power pulse power supply system of the present invention can realize the step-up / down voltage function by setting the first unidirectional rectifier module, the second unidirectional rectifier module, the first switch module and the second switch module. Regardless of whether the required output voltage is higher or lower than the input voltage in the power supply circuit, the pulse current input control terminal can output a voltage that meets the requirements.

[0023] (2) The step-up and step-down device of the present invention applied to a high-power pulse power supply system has low cost and good promotion value. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 A schematic diagram of a module of an embodiment of a step-down / boosting device of the present invention;

[0025] Figure 2 for Figure 1 Schematic diagram of the circuit structure of an embodiment.

[0026] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings.

[0027] Description of Figure Numbers:

[0028]

[0029] DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0031] It should be noted that all directional indications (such as up, down, left, right, front and back) in the embodiments of the present invention are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0032] In addition, the descriptions of "first", "second", etc. in the present invention are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention. The present invention provides a buck-boost device, which is used in a high-power pulse power supply system. The buck-boost device can adjust the voltage output by the energy storage device to obtain the power supply voltage required by the load.

[0033] See also Figure 1 In one embodiment, the buck-boost device includes an energy storage inductor module 10, an energy storage capacitor C, a first unidirectional rectifier module 20, a second unidirectional rectifier module 30, a first switch module 40 and a second switch module 50.

[0034] The first end of the first switch module 40 is connected to the voltage input end, the second end of the first switch module 40 is connected to the first end of the energy storage inductor module 10, the third end of the first switch module 40 is connected to the second end of the energy storage inductor module 10, the fourth end of the first switch module 40 is connected to the third end of the energy storage inductor module 10, the first end of the first unidirectional rectifier module 20 is grounded, the second end of the first unidirectional rectifier module 20 is connected to the first end of the energy storage inductor module 10, the third end of the first unidirectional rectifier module 20 is connected to the second end of the energy storage inductor module 10, the fourth end of the first unidirectional rectifier module 20 is connected to the third end of the energy storage inductor module 10, and the fourth end of the energy storage inductor module 10 is grounded. The first end of the second unidirectional rectifier module 30 is connected to the second end of the second unidirectional rectifier module 30, the fifth end of the energy storage inductor module 10 is connected to the third end of the second unidirectional rectifier module 30, the sixth end of the energy storage inductor module 10 is connected to the fourth end of the second unidirectional rectifier module 30, the first end of the second unidirectional rectifier module 30 is grounded through the energy storage capacitor C, the first end of the second switch module 50 is grounded, the second end of the second switch module 50 is connected to the fourth end of the energy storage inductor module 10, the third end of the second switch module 50 is connected to the fifth end of the energy storage inductor module 10, the fourth end of the second switch module 50 is connected to the sixth end of the energy storage inductor module 10, and the output end of the second unidirectional rectifier module 30 is also connected to the voltage output end.

[0035] The voltage regulation process of the above-mentioned buck-boost circuit can be divided into a charging process and a discharging process of the energy storage inductor module 10 .

[0036] Refer to Figure 1 and Figure 2 The above-mentioned energy storage inductor module 10 may include a first energy storage inductor L1, a second energy storage inductor L2 and a third energy storage inductor L3. The first end of the first energy storage inductor L1 is connected to the second end of the first switch module 40, the second end of the first energy storage inductor L1 is connected to the fourth end of the second unidirectional rectifier module 30, the first end of the second energy storage inductor L2 is connected to the third end of the first switch module 40, the second end of the second energy storage inductor L2 is connected to the third end of the second unidirectional rectifier module 30, the first end of the third energy storage inductor L3 is connected to the fourth end of the first switch module 40, and the second end of the third energy storage inductor L3 is connected to the second end of the second unidirectional rectifier module 30.

[0037] It is understandable that the first switch module 40 and the second switch module 50 are turned on during charging and turned off during discharging. The first unidirectional rectifier module 20 and the second unidirectional rectifier module 30 can limit the current direction to only flow from the input end to the output end.

[0038] During the charging process of the energy storage inductor module 10, the fourth terminal, the fifth terminal and the sixth terminal of the energy storage inductor module 10 are grounded through the second switch module 50, the input terminal of the first unidirectional rectifier module 20 is low level, and the output terminal is high level, and the first unidirectional rectifier module 20 is equivalent to being cut off, the input terminal of the second unidirectional rectifier module 30 is low level, and the output terminal is high level, and the second unidirectional rectifier module 30 is equivalent to being cut off. Then the input voltage of the voltage input terminal flows into the ground through the first switch module 40, the energy storage inductor module 10 and the second switch module 50. In this current loop, the current on the energy storage inductor module 10 continues to rise until it reaches the maximum value, thereby realizing the energy storage charging of the energy storage inductor module 10.

[0039] During the discharge process of the energy storage inductor module 10, the first end, the second end and the third end of the energy storage inductor module 10 no longer have input voltage, and the current on the energy storage inductor module 10 begins to decrease. In order to suppress the current reduction, the energy storage inductor module 10 releases the stored energy. At this time, due to the discharge of the energy storage inductor module 10, the fourth end, the fifth end and the sixth end of the energy storage inductor module 10 are at a high level, and the first end, the second end and the third end are at a low level, then the first unidirectional rectifier module 20 and the second unidirectional rectifier module 30 are turned on, the first switch module 40 and the second switch module 50 are turned off, and the current direction is from the input end to the output end of the first unidirectional rectifier module 20 and the second unidirectional rectifier module 30, and the current loop is the earth - the first unidirectional rectifier module 20 - the energy storage inductor module 10 - the second unidirectional rectifier module 30 - the energy storage capacitor C - the earth. During the discharge process of the energy storage inductor module 10, the energy stored in the energy storage inductor module 10 can be transferred to the energy storage capacitor C, so that the voltage across the energy storage capacitor C continues to increase to exceed the input voltage, thereby achieving input voltage boost.

[0040] After the discharge process of the energy storage inductor module 10 is finished, the energy storage inductor module 10 enters the charging process. During the charging process of the energy storage inductor module 10, the energy storage capacitor C can power the load 70 through the energy transmitted by the energy storage inductor module 10 during the discharge process.

[0041] In this embodiment, the energy stored in the energy storage inductor module 10 can be released to the energy storage capacitor C to increase the voltage across the energy storage capacitor C, thereby achieving a voltage boosting function in which the output voltage is greater than the input voltage.

[0042] It should be noted that, usually, the energy storage device is used as the power module 60, and its voltage range is 960V to 1402V. Through the above-mentioned buck-boost circuit, it can also supply power to the load 70 through the buck-boost function.

[0043] It should be noted that if Figure 2 As shown, the CT pins of the first switch module 40 and the second switch module 50 are control terminals.

[0044] Refer to Figure 1 and Figure 2 The above-mentioned first switch module 40 may include a first switch tube Q1, a second switch tube Q2 and a third switch tube Q3. The first end of the first switch tube Q1 is connected to the voltage input end, the second end of the first switch tube Q1 is connected to the first end of the first energy storage inductor L1, the first end of the second switch tube Q2 is connected to the voltage input end, the second end of the second switch tube Q2 is connected to the first end of the second energy storage inductor L2, the first end of the third switch tube Q3 is connected to the voltage input end, and the second end of the third switch tube Q3 is connected to the first end of the third energy storage inductor L3.

[0045] Refer to Figure 1 and Figure 2 The above-mentioned second switch module 50 may include a fourth switch tube Q4, a fifth switch tube Q5 and a sixth switch tube Q6, the first end of the fourth switch tube Q4 is connected to the second end of the first energy storage inductor L1, the second end of the fourth switch tube Q4 is grounded, the first end of the fifth switch tube Q5 is connected to the second end of the second energy storage inductor L2, the second end of the fifth switch tube Q5 is grounded, the first end of the sixth switch tube Q6 is connected to the second end of the third energy storage inductor L3, and the second end of the sixth switch tube Q6 is grounded.

[0046] Further, the first switch tube Q1, the second switch tube Q2, the third switch tube Q3, the fourth switch tube Q4, the fifth switch tube Q5 and the sixth switch tube Q6 can all be MOS tubes, the drain of the first switch tube Q1 is connected to the voltage input terminal, the source of the first switch tube Q1 is connected to the first end of the first energy storage inductor L1, the gate of the first switch tube Q1 is connected to the control terminal, the drain of the second switch tube Q2 is connected to the voltage input terminal, the source of the second switch tube Q2 is connected to the first end of the second energy storage inductor L2, the gate of the second switch tube Q2 is connected to the control terminal, the drain of the third switch tube Q3 is connected to the voltage input terminal, and the third The source of the switch tube Q3 is connected to the first end of the third energy storage inductor L3, the gate of the third switch tube Q3 is connected to the control end, the drain of the fourth switch tube Q4 is connected to the second end of the first energy storage inductor L1, the source of the fourth switch tube Q4 is grounded, the gate of the fourth switch tube Q4 is connected to the control end, the drain of the fifth switch tube Q5 is connected to the second end of the second energy storage inductor L2, the source of the fifth switch tube Q5 is grounded, the gate of the fifth switch tube Q5 is connected to the control end, the drain of the sixth switch tube Q6 is connected to the second end of the third energy storage inductor L3, the source of the sixth switch tube Q6 is grounded, and the gate of the sixth switch tube Q6 is connected to the control end.

[0047] The above-mentioned first unidirectional rectifier module 20 may include a first diode D1, a second diode D2 and a third diode D3, the positive electrode of the first diode D1 is grounded, the negative electrode of the first diode D1 is connected to the first end of the first energy storage inductor L1, the positive electrode of the second diode D2 is grounded, the negative electrode of the second diode D2 is connected to the first end of the second energy storage inductor L2, the positive electrode of the third diode D3 is grounded, and the negative electrode of the third diode D3 is connected to the first end of the third energy storage inductor L3.

[0048] The above-mentioned second unidirectional rectifier module 30 may include a fourth diode D4, a fifth diode D5 and a sixth diode D6, the positive electrode of the fourth diode D4 is connected to the second end of the first energy storage inductor L1, the negative electrode of the fourth diode D4 is grounded, the positive electrode of the fifth diode D5 is connected to the second end of the second energy storage inductor L2, the negative electrode of the fifth diode D5 is grounded, the positive electrode of the sixth diode D6 is connected to the second end of the third energy storage inductor L3, and the negative electrode of the sixth diode D6 is grounded.

[0049] The first diode D1, the second diode D2, the third diode D3, the fourth diode D4, the fifth diode D5 and the sixth diode D6 can limit the current direction from the anode to the cathode, that is, the energy storage inductor module 10 can release energy to the energy storage capacitor C during the discharge process, and when the energy storage inductor module 10 is charged, the first diode D1, the second diode D2, the third diode D3, the fourth diode D4, the fifth diode D5 and the sixth diode D6 are reverse biased and cut off, and the energy storage capacitor C cannot transfer energy to the energy storage inductor module 10, but can only supply power to the load 70.

[0050] The energy storage capacitor C may be a polar capacitor. When the energy storage capacitor C is a polar capacitor, the positive electrode of the energy storage capacitor C is connected to the voltage output terminal, and the negative electrode of the energy storage capacitor C is grounded.

[0051] The above are only optional embodiments of the present invention, and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

[0052] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments, and the above embodiments and descriptions are only for explaining the structural relationship and principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, and these changes and improvements all fall within the scope of the present invention to be protected.

Claims

1. A step-up / step-down device for a high-power pulse power supply system, characterized in that: It includes an energy storage inductor module, an energy storage capacitor, a first unidirectional rectifier module, a second unidirectional rectifier module, a first switch module and a second switch module; The first end of the first switch module is connected to the voltage input end, the second end of the first switch module is connected to the first end of the energy storage inductor module, the third end of the first switch module is connected to the second end of the energy storage inductor module, the fourth end of the first switch module is connected to the third end of the energy storage inductor module, the first end of the first unidirectional rectifier module is grounded, the second end of the first unidirectional rectifier module is connected to the first end of the energy storage inductor module, the third end of the first unidirectional rectifier module is connected to the second end of the energy storage inductor module, the fourth end of the first unidirectional rectifier module is connected to the third end of the energy storage inductor module, and the fourth end of the energy storage inductor module is connected to the ground. The second end of the second unidirectional rectifier module is connected, the fifth end of the energy storage inductor module is connected to the third end of the second unidirectional rectifier module, the sixth end of the energy storage inductor module is connected to the fourth end of the second unidirectional rectifier module, the first end of the second unidirectional rectifier module is grounded through the energy storage capacitor, the first end of the second switch module is grounded, the second end of the second switch module is connected to the fourth end of the energy storage inductor module, the third end of the second switch module is connected to the fifth end of the energy storage inductor module, the fourth end of the second switch module is connected to the sixth end of the energy storage inductor module, and the first end of the second unidirectional rectifier module is also connected to the voltage output end; The first unidirectional rectifier module is used to limit the current direction to from the input end of the first unidirectional rectifier module to the output end of the first unidirectional rectifier module; The second unidirectional rectifier module is used to limit the current direction to from the input end of the second unidirectional rectifier module to the output end of the second unidirectional rectifier module; The first end of the energy storage capacitor is connected to the voltage output end, and the second end of the energy storage capacitor is grounded; The first switch module and the second switch module also include a control end. When the pulse current is in the pulse rising stage, the first switch module and the second switch module are turned on; when the pulse current is in the falling stage and the pulse gap, the first switch module and the second switch module are turned off, and the first unidirectional rectifier module and the second unidirectional rectifier module are freewheeling. The energy storage inductor module includes a first energy storage inductor, a second energy storage inductor and a third energy storage inductor; The first unidirectional rectifier module includes a first diode, a second diode and a third diode, wherein the anode of the first diode is grounded, the cathode of the first diode is connected to the first end of the first energy storage inductor, the anode of the second diode is grounded, the cathode of the second diode is connected to the first end of the second energy storage inductor, the anode of the third diode is grounded, and the cathode of the third diode is connected to the first end of the third energy storage inductor; The second switch module includes a fourth switch tube, a fifth switch tube and a sixth switch tube, wherein the first end of the fourth switch tube is connected to the second end of the first energy storage inductor, the second end of the fourth switch tube is grounded, the first end of the fifth switch tube is connected to the second end of the second energy storage inductor, the second end of the fifth switch tube is grounded, the first end of the sixth switch tube is connected to the second end of the third energy storage inductor, and the second end of the sixth switch tube is grounded.

2. The step-up / down voltage device for high-power pulse power supply system according to claim 1, characterized in that: The energy storage inductor module includes a first energy storage inductor, a second energy storage inductor and a third energy storage inductor, wherein the first end of the first energy storage inductor is connected to the second end of the first switch module, the second end of the first energy storage inductor is connected to the fourth end of the second unidirectional rectifier module, the first end of the second energy storage inductor is connected to the third end of the first switch module, the second end of the second energy storage inductor is connected to the third end of the second unidirectional rectifier module, the first end of the third energy storage inductor is connected to the fourth end of the first switch module, and the second end of the third energy storage inductor is connected to the second end of the second unidirectional rectifier module.

3. The step-up / down voltage device for high-power pulse power supply system according to claim 1 is characterized in that: The second unidirectional rectifier module includes a fourth diode, a fifth diode and a sixth diode, the anode of the fourth diode is connected to the second end of the first energy storage inductor, the cathode of the fourth diode is connected to the voltage output end, the anode of the fifth diode is connected to the second end of the second energy storage inductor, the cathode of the fifth diode is connected to the voltage output end, the anode of the sixth diode is connected to the second end of the third energy storage inductor, and the cathode of the sixth diode is connected to the voltage output end.

4. The step-up / down voltage device for high-power pulse power supply system according to claim 1 is characterized in that: The first switch module includes a first switch tube, a second switch tube and a third switch tube. The first end of the first switch tube is connected to the voltage input end, the second end of the first switch tube is connected to the first end of the first energy storage inductor, the first end of the second switch tube is connected to the voltage input end, the second end of the second switch tube is connected to the first end of the second energy storage inductor, the first end of the third switch tube is connected to the voltage input end, and the second end of the third switch tube is connected to the first end of the third energy storage inductor.

5. The step-up / down voltage device for high-power pulse power supply system according to claim 4 is characterized in that: The first switch tube, the second switch tube, the third switch tube, the fourth switch tube, the fifth switch tube and the sixth switch tube are all MOS tubes, the drain of the first switch tube is connected to the voltage input terminal, the source of the first switch tube is connected to the first end of the first energy storage inductor, the gate of the first switch tube is connected to the control terminal, the drain of the second switch tube is connected to the voltage input terminal, the source of the second switch tube is connected to the first end of the second energy storage inductor, the gate of the second switch tube is connected to the control terminal, the drain of the third switch tube is connected to the voltage input terminal, and the third switch tube The source of the third switch tube is connected to the first end of the third energy storage inductor, the gate of the third switch tube is connected to the control end, the drain of the fourth switch tube is connected to the second end of the first energy storage inductor, the source of the fourth switch tube is grounded, the gate of the fourth switch tube is connected to the control end, the drain of the fifth switch tube is connected to the second end of the second energy storage inductor, the source of the fifth switch tube is grounded, the gate of the fifth switch tube is connected to the control end, the drain of the sixth switch tube is connected to the second end of the third energy storage inductor, the source of the sixth switch tube is grounded, and the gate of the sixth switch tube is connected to the control end.

6. The step-up / down voltage device for high-power pulse power supply system according to claim 1, characterized in that: The buck-boost device applied to a high-power pulse power supply system comprises a power supply module, a buck-boost circuit and a load connected in sequence.

7. The step-up and down voltage method of the step-up and down voltage device applied to the high power pulse power supply system according to claim 1, characterized in that: During the charging process of the energy storage inductor module, the fourth end, the fifth end and the sixth end of the energy storage inductor module are grounded through the second switch module, the input end of the first unidirectional rectifier module is at a low level and the output end is at a high level, and the first unidirectional rectifier module is equivalent to being cut off, the input end of the second unidirectional rectifier module is at a low level and the output end is at a high level, and the second unidirectional rectifier module is equivalent to being cut off; the input voltage at the voltage input end flows into the ground through the first switch module, the energy storage inductor module and the second switch module, and in the current loop, the current on the energy storage inductor module continues to rise until it reaches a maximum value, thereby realizing energy storage charging of the energy storage inductor module; During the discharge process of the energy storage inductor module, the first end, the second end and the third end of the energy storage inductor module no longer have input voltage, and the current on the energy storage inductor module begins to decrease. In order to suppress the current reduction, the energy storage inductor module releases the stored energy; at this time, due to the discharge of the energy storage inductor module, the fourth end, the fifth end and the sixth end of the energy storage inductor module are at a high level, and the first end, the second end and the third end are at a low level, then the first unidirectional rectifier module and the second unidirectional rectifier module are turned on, the first switch module and the second switch module are turned off, the current direction is from the input end to the output end of the first unidirectional rectifier module and the second unidirectional rectifier module, and the current loop is the earth - the first unidirectional rectifier module - the energy storage inductor module - the second unidirectional rectifier module - the energy storage capacitor C - the earth; during the discharge process of the energy storage inductor module, the energy stored in the energy storage inductor module can be transferred to the energy storage capacitor C, so that the voltage across the energy storage capacitor C continues to increase to exceed the input voltage, thereby achieving input voltage boost; After the discharge process of the energy storage inductor module is finished, the energy storage inductor module enters the charging process. During the charging process of the energy storage inductor module, the energy storage capacitor C can supply power to the load through the energy transmitted by the energy storage inductor module during the discharge process.

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