A high-voltage, high-power pulse power supply

Abstract

This invention discloses a high-voltage, high-power pulse power supply, comprising a full-bridge DC / DC converter, a second-order RLC circuit, and a pulse modulation circuit. The full-bridge DC / DC converter includes a first step-up transformer with a turns ratio of n, switching transistors S1, S2, S3, and S4, diodes D1, D2, D3, and D4, an inductor L, and a capacitor C. The second-order RLC circuit includes a resonant resistor Rr, a resonant inductor Lr, a resonant capacitor Cr, a switching transistor, and a diode D5. The pulse modulation circuit includes a second step-up transformer with a turns ratio of N1:N2, a core reset circuit composed of winding Lw and diode D7, switching transistors Q1 and Q2, a diode D6, and a pulse load Rpulse. This invention achieves high efficiency, stability, high precision, and high dynamic response in the pulse power supply system without affecting other operating performance, offering flexible adjustment and strong practicality.

Description

Technical Field

[0001] This invention relates to the field of pulse power supply technology, and in particular to a high-voltage, high-power pulse power supply. Background Technology

[0002] In traditional high-voltage, high-power pulse power supply design, there are generally two approaches: Marx generators and series modulation using switching devices based on high-voltage DC power supplies. Marx generators require multiple capacitors in series, resulting in excessive voltage drop across the line, uneven capacitor charging, insufficient charging of downstream capacitors, and voltage failure to reach the theoretical value. Furthermore, due to the time constant of the capacitor modules, Marx generators struggle to output high-frequency pulse voltages. High-voltage, high-power pulse power supplies based on series modulation using switching devices based on high-voltage DC power supplies have a large number of high-voltage side components, leading to low efficiency and system instability. The structure of a traditional high-voltage, high-power pulse power supply is as follows: Figure 1 and Figure 2 As shown. Summary of the Invention

[0003] The main objective of this invention is to solve the technical problems existing in the prior art by proposing a high-efficiency, stable, high-precision, and high-dynamic-response high-voltage high-power pulse power supply.

[0004] To achieve the above objectives, the present invention provides a high-voltage, high-power pulse power supply, comprising a full-bridge DC / DC converter, an RLC second-order circuit, and a pulse modulation circuit;

[0005] The full-bridge DC / DC converter includes a first step-up transformer with a turns ratio of n, switching transistors S1, S2, S3, and S4, diodes D1, D2, D3, and D4, an inductor L, and a capacitor C.

[0006] The second-order RLC circuit includes a resonant resistor Rr, a resonant inductor Lr, a resonant capacitor Cr, and a switching transistor. Diode D5;

[0007] The pulse modulation circuit includes a second step-up transformer with a turns ratio of N1:N2, a core reset circuit consisting of winding Lw and diode D7, switching transistors Q1 and Q2, diode D6, and pulse load Rpulse.

[0008] A further technical solution of the present invention is that, in the second-order RLC circuit, the switching transistor... As the operating switch for the resonant resistor Rr, resonant inductor Lr, and resonant capacitor Cr, the resonant current is grounded through the diode D5.

[0009] A further technical solution of the present invention is that, in the pulse modulation circuit, the switching transistor Q1 is connected to the positive terminal of the resonant capacitor Cr and ground, the switching transistor Q2 is connected to the negative terminal of the resonant capacitor Cr and the primary side Ls of the second transformer, and the core reset circuit composed of the winding Lw and the diode D7 feeds energy back to the resonant capacitor Cr.

[0010] A further technical solution of the present invention is that, in the high-voltage, high-power pulse power supply, N1:N2 is much greater than n, thereby reducing the number of high-voltage side components to achieve high system efficiency and improve stability.

[0011] A further technical solution of the present invention is that, in the high-voltage high-power pulse power supply, the high-voltage pulses at both ends of Rpulse are controlled by an outer loop to achieve high output voltage accuracy of the system.

[0012] A further technical solution of the present invention is to control the voltage across the resonant capacitor Cr through an inner loop to achieve a high dynamic response of the system.

[0013] The beneficial effects of this high-voltage, high-power pulse power supply are as follows: This invention integrates the advantages of traditional high-voltage, high-power pulse power supplies while overcoming their disadvantages through the aforementioned technical solution. This high-voltage, high-power pulse power supply not only has a simple structure and achieves high efficiency, stability, high precision, and high dynamic response in the pulse power system, but also allows the output pulse voltage duty cycle to be changed via switching transistors Q1 and Q2 without affecting other operating performance. This design offers flexible adjustment and strong practicality.

[0014] High-efficiency, stable, high-precision, and high-dynamic-response high-voltage high-power pulse power supplies can solve key technical problems such as power microwave tubes, high-voltage high-power devices, and combined control circuits, providing theoretical and technical support for the development of subsequent related space-based high-voltage application payloads, which is of great significance. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the structure of a Marx generator in the prior art;

[0017] Figure 2 This is a schematic diagram of the structure of a series-modulated pulse power supply based on a high-voltage DC power supply and a switching device in the prior art.

[0018] Figure 3 This is a schematic diagram of the circuit structure of a preferred embodiment of the high-voltage, high-power pulse power supply of the present invention.

[0019] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0020] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0021] This invention proposes a high-efficiency, stable, high-precision, and high-dynamic-response high-voltage high-power pulse power supply. The main circuit topology of the high-voltage high-power pulse power supply of this invention includes a full-bridge DC / DC converter, an RLC second-order circuit, and a pulse modulation circuit. By reasonably setting the step-up ratio of the two transformers and simultaneously controlling the voltages across Rpulse and Cr, the efficiency, stability, accuracy, and dynamic response of the system are improved.

[0022] Please refer to Figure 3 The preferred embodiment of the high-voltage high-power pulse power supply of the present invention includes a high-voltage high-power pulse power supply main circuit constructed from a full-bridge DC / DC converter, an RLC second-order circuit, and a pulse modulation circuit.

[0023] The full-bridge DC / DC converter includes a step-up transformer with a turns ratio of n, switching transistors S1, S2, S3, and S4, diodes D1, D2, D3, and D4, an inductor L, and a capacitor C.

[0024] The second-order RLC circuit includes a resonant resistor Rr, a resonant inductor Lr, a resonant capacitor Cr, and a switching transistor. Diode D5.

[0025] The pulse modulation circuit is obtained by removing the output LC filter circuit from the forward converter. It includes a step-up transformer with a turns ratio of N1:N2, a core reset circuit consisting of winding Lw and diode D7, switching transistors Q1 and Q2, diode D6, and pulse load Rpulse.

[0026] Simultaneously changing the duty cycle of the switching transistors Q1 and Q2 alters the duty cycle of the power supply output pulse. By controlling the voltage across the resonant capacitor Cr and the pulse load Rpulse, high stability, high precision, and high dynamic response of the power supply output voltage can be achieved.

[0027] Furthermore, in this embodiment, in the second-order RLC circuit, the switching transistor... As the operating switch for the resonant resistor Rr, resonant inductor Lr, and resonant capacitor Cr, the resonant current is grounded through the diode D5.

[0028] Furthermore, in this embodiment, in the pulse modulation circuit, the switch Q1 is connected to the positive terminal of the resonant capacitor Cr and ground, and the switch Q2 is connected to the negative terminal of the resonant capacitor Cr and the primary side Ls of the transformer. The switch Q1 and the switch Q2 always operate simultaneously, and the core reset circuit composed of the winding Lw and the diode D7 feeds energy back to the resonant capacitor Cr.

[0029] Furthermore, in this embodiment, in the high-voltage high-power pulse power supply circuit, by reasonably setting the step-up ratio of the two transformers, making N1:N2 much greater than n, the number of high-voltage side components is reduced, thereby achieving high efficiency of the pulse power supply system and improving stability.

[0030] Furthermore, in this embodiment, the high-voltage high-power pulse power supply circuit uses an outer loop to control the high-voltage pulses across Rpulse to achieve high output voltage accuracy of the system.

[0031] Furthermore, in this embodiment, the voltage across Cr is controlled by an inner loop in the high-voltage, high-power pulse power supply circuit to achieve high dynamic response of the system.

[0032] The beneficial effects of this high-voltage, high-power pulse power supply are as follows: This invention integrates the advantages of traditional high-voltage, high-power pulse power supplies while overcoming their disadvantages through the aforementioned technical solution. This high-voltage, high-power pulse power supply not only has a simple structure and achieves high efficiency, stability, high precision, and high dynamic response in the pulse power system, but also allows the output pulse voltage duty cycle to be changed via switching transistors Q1 and Q2 without affecting other operating performance. This design offers flexible adjustment and strong practicality.

[0033] High-efficiency, stable, high-precision, and high-dynamic-response high-voltage high-power pulse power supplies can solve key technical problems such as power microwave tubes, high-voltage high-power devices, and combined control circuits, providing theoretical and technical support for the development of subsequent related space-based high-voltage application payloads, which is of great significance.

[0034] The above description is only a preferred embodiment of the present invention and does not limit the patent scope of the present invention. All equivalent structural transformations made under the concept of the present invention using the contents of the present invention specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present invention.

Claims

1. A high-voltage, high-power pulse power supply, characterized in that, Includes a full-bridge DC / DC converter, a second-order RLC circuit, and a pulse modulation circuit; The full-bridge DC / DC converter includes a first step-up transformer with a turns ratio of n, switching transistors S1, S2, S3, and S4, diodes D1, D2, D3, and D4, an inductor L, and a capacitor C. The drain of switching transistor S1 is connected to the drain of switching transistor S3 and the positive terminal of the power supply Vin. The source of switching transistor S2 is connected to the drain of switching transistor S3 and one end of the primary winding of the first step-up transformer. The source of switching transistor S3 is connected to the drain of switching transistor S4 and the other end of the primary winding of the first step-up transformer. The sources of switching transistors S2 and S4 are connected to the power supply Vi. The negative terminal of n; one end of the secondary side of the first step-up transformer is connected to the anode of diode D1, the cathode of diode D1 is connected to the cathode of diode D3 and one end of inductor L, the other end of inductor L is connected to one end of capacitor C, the other end of capacitor C is connected to the anode of diode D2 and the anode of diode D4, the cathode of diode D2 is connected to one end of the secondary side of the first step-up transformer and the anode of diode D1, and the cathode of diode D4 is connected to the anode of diode D3 and the other end of the secondary side of the first step-up transformer; The second-order RLC circuit includes a resonant resistor Rr, a resonant inductor Lr, a resonant capacitor Cr, and a switching transistor. Diode D5; the switching transistor One end of the switch is connected to the other end of the inductor L. The other end is connected to one end of the inductor Lr, the other end of the inductor Lr is connected to one end of the resonant resistor Rr, the other end of the resonant resistor Rr is connected to one end of the resonant capacitor Cr, the anode of the diode D5 is connected to the other end of the resonant capacitor Cr, and the cathode of the diode D5 is connected to the anode of the diode D4. The pulse modulation circuit includes a second boost transformer with a turns ratio of N1:N2, a core reset circuit consisting of winding Lw and diode D7, switching transistors Q1 and Q2, diode D6, and a pulse load Rpulse. The cathode of diode D7 is connected to the other end of the resonant resistor Rr, one end of the capacitor Cr, and one end of the switching transistor Q1. The other end of the switching transistor Q1 is connected to the anode of diode D4 and the other end of the primary side of the second boost transformer. The anode of diode D7 is connected to one end of winding Lw. The other end of winding Lw is connected to one end of switching transistor Q2 and the other end of the resonant capacitor Cr. The other end of switching transistor Q2 is connected to one end of the primary side of the second boost transformer. One end of the secondary side of the second boost transformer is connected to the anode of diode D6. The cathode of diode D6 is connected to the positive terminal of the pulse load Rpulse. The other end of the secondary side of the second boost transformer is connected to the negative terminal of the pulse load Rpulse.

2. The high-voltage, high-power pulse power supply according to claim 1, characterized in that, In the RLC second-order circuit, the switching transistor As the operating switch for the resonant resistor Rr, resonant inductor Lr, and resonant capacitor Cr, the resonant current is grounded through the diode D5.

3. The high-voltage, high-power pulse power supply according to claim 2, characterized in that, In the pulse modulation circuit, the switch Q1 is connected to the positive terminal of the resonant capacitor Cr and ground, the switch Q2 is connected to the negative terminal of the resonant capacitor Cr and the primary side Ls of the second transformer, and the core reset circuit composed of the winding Lw and the diode D7 feeds energy back to the resonant capacitor Cr.

4. The high-voltage, high-power pulse power supply according to claim 1, characterized in that, In the high-voltage, high-power pulse power supply, N1:N2 is much greater than n. By reducing the number of high-voltage side components, the system achieves high efficiency and improves stability.

5. The high-voltage, high-power pulse power supply according to claim 1, characterized in that, In the high-voltage, high-power pulse power supply, the high-voltage pulses at both ends of Rpulse are controlled by the outer loop to achieve high output voltage accuracy of the system.

6. The high-voltage, high-power pulse power supply according to claim 1, characterized in that, The high dynamic response of the system is achieved by controlling the voltage across the resonant capacitor Cr through the inner loop.

Images