Power supply filter for suppressing high-power microwaves

Abstract

The utility model discloses a power supply filter for suppressing high-power microwaves, which belongs to the technical field of power supply filters and is characterized in that a filter circuit is mounted on a mounting mechanism; the filter circuit comprises two anti-microwave pulse suppression modules, a feed-through capacitor bank, eight capacitors, a first resistor, two common mode inductors, two differential mode inductors, a second resistor, a zero line and a live line. By means of the mode, the effect of restraining high-power microwaves is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of power supply filters, in particular to a power supply filter for suppressing high-power microwaves. Background Art

[0002] High-power microwaves (HPM) are powerful electromagnetic pulses with frequencies ranging from 1 GHz to 300 GHz and peak powers exceeding 100 MW. The electrothermal effects generated by direct or indirect coupling from HPM can interfere with the operation of electronic equipment and even cause irreversible damage or destruction. Therefore, strengthening research on HPM protection measures is crucial. Currently, reflection filters are used to suppress HPM by reflecting unwanted frequency components. However, these simply reflect the signal and, due to parasitic resonances, reduce insertion loss.

[0003] Based on this, the utility model designs a power supply filter for suppressing high-power microwaves to solve the above problems. Utility Model Content

[0004] In view of the above-mentioned shortcomings of the prior art, the utility model provides a power supply filter for suppressing high-power microwaves.

[0005] In order to achieve the above objectives, the present invention is implemented through the following technical solutions:

[0006] A power supply filter for suppressing high-power microwaves, comprising a mounting mechanism and a filter circuit, wherein the filter circuit is mounted on the mounting mechanism and comprises two microwave pulse suppression modules, a through-core capacitor group, eight capacitors, a first resistor, two common-mode inductors, two differential-mode inductors, a second resistor, a neutral wire, and a live wire;

[0007] The neutral line and the live line are arranged in parallel, the two microwave pulse suppression modules are connected in series between the neutral line and the live line, and the middle parts of the two microwave pulse suppression modules are grounded. There are four through-core capacitor groups, and two are arranged in a group at both ends of the neutral line and the live line. One end of each group of two through-core capacitor groups is electrically connected to the live line and the neutral line respectively, and the other end of the through-core capacitor group is grounded. There are two common-mode inductors, one end of the common-mode inductor on the left is electrically connected to the neutral line and the live line respectively, the other side of the magnetic ring wire of the common-mode inductor on the left is electrically connected to one side of the magnetic ring wire of the common-mode inductor on the right, and the other side of the magnetic ring wire of the common-mode inductor on the right is electrically connected to one end of the two differential-mode inductors respectively, and the other ends of the two differential-mode inductors are electrically connected to the neutral line and the live line respectively. The eight capacitors are grouped in two, and the two capacitors in each group are connected in series, and the capacitor on one side is electrically connected to the live line and the capacitor on the other side is grounded. The wire between the two capacitors in series is electrically connected to the neutral line.

[0008] Furthermore, the four groups of two capacitors connected in series are respectively located on the left side of the common-mode inductor on the left, between the two common-mode inductors, between the common-mode inductor and the differential-mode inductor, and on the right side of the differential-mode inductor. The resistors 1 and 2 are connected in series, the resistor 1 is electrically connected to the live wire, the resistor 2 is grounded, and the wire between the resistor 1 and the resistor 2 is electrically connected to the neutral wire. The microwave pulse suppression module, the through-core capacitor group, the capacitor, the common-mode inductor, the differential-mode inductor, and the resistor 2 are all installed on the mounting mechanism.

[0009] Furthermore, the installation mechanism includes a filter housing, a small bottom plate of the incoming line compartment and two side partitions.

[0010] Furthermore, the small bottom plate of the incoming wire bin is fixedly mounted on the inner wall of the filter housing, and the two side partitions are fixedly mounted on the surface of the small bottom plate of the incoming wire bin.

[0011] Furthermore, each group of two through-core capacitor groups is fixedly connected to two side partitions respectively, and the two through-core capacitor groups on the left are fixedly connected to an anti-microwave pulse suppression module respectively.

[0012] Furthermore, it also includes a grounding screw, which is fixedly installed on the side partition.

[0013] Furthermore, the grounding screw is inserted into the mounting hole provided on the side partition and is locked with the side partition via a nut.

[0014] Furthermore, a through hole is provided on the surface of the small bottom plate of the incoming line bin, and a nut for threaded connection with the waveguide screw is embedded in the through hole.

[0015] Compared with the prior art, the utility model has the following beneficial effects: the interference of high-power microwave pulses on sensitive equipment or systems is suppressed by the anti-microwave pulse suppression module provided in the filter circuit, thereby ensuring normal operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be derived from these drawings without inventive effort.

[0017] Figure 1 This is a circuit diagram of a power filter for suppressing high-power microwaves in the utility model;

[0018] Figure 2 It is a schematic diagram of the installation mechanism of the present utility model.

[0019] The numbers in the figure represent:

[0020] 1. Filter housing; 2. Microwave pulse suppression module; 3. Through-core capacitor group; 4. Side partition; 5. Capacitor; 6. Resistor 1; 7. Common-mode inductor; 8. Small bottom plate for incoming line compartment; 9. Differential-mode inductor; 10. Grounding screw; 11. Resistor 2; 12. Neutral wire; 13. Live wire. DETAILED DESCRIPTION

[0021] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of the present invention.

[0022] The terms “left,” “right,” “front,” “back,” “up,” and “down” mentioned in the following description are oriented in the viewing direction of the front view.

[0023] Example 1: In some embodiments, please refer to the accompanying drawings of the specification. Figure 1-Figure 2 , a power supply filter for suppressing high-power microwaves, comprising a mounting mechanism and a filter circuit, wherein the filter circuit is mounted on the mounting mechanism;

[0024] The filter circuit includes two microwave pulse suppression modules 2, a through-core capacitor group 3, eight capacitors 5, a resistor 1 6, two common-mode inductors 7, two differential-mode inductors 9, a resistor 2 11, a neutral wire 12, and a live wire 13;

[0025] The neutral line 12 and the live line 13 are arranged in parallel, the two microwave pulse suppression modules 2 are connected in series between the neutral line 12 and the live line 13, the middle part of the two microwave pulse suppression modules 2 is grounded, there are four through-core capacitor groups 3 and two are arranged at both ends of the neutral line 12 and the live line 13 in a group, one end of each group of two through-core capacitor groups 3 is electrically connected to the live line 13 and the neutral line 12 respectively, and the other end of the through-core capacitor group 3 is grounded, there are two common-mode inductors 7, one end of the common-mode inductor 7 at both ends of the left side is electrically connected to the neutral line 12 and the live line 13 respectively, The other sides of the magnetic ring wires of the common-mode inductor 7 at one end are electrically connected to one side of the magnetic ring wires of the common-mode inductor 7 on the right side, and the other sides of the magnetic ring wires of the common-mode inductor 7 on the right side are electrically connected to one end of the two differential-mode inductors 9. The other ends of the two differential-mode inductors 9 are electrically connected to the neutral line 12 and the live line 13 respectively. The eight capacitors 5 are grouped into two, and each group of two capacitors 5 is connected in series, and the capacitor 5 on one side is electrically connected to the live line 13, and the capacitor 5 on the other side is grounded. The wire between the two capacitors 5 connected in series is electrically connected to the neutral line 12.

[0026] Four groups of two capacitors 5 connected in series are respectively located on the left side of the common-mode inductor 7 on the left, between the two common-mode inductors 7, between the common-mode inductor 7 and the differential-mode inductor 9, and on the right side of the differential-mode inductor 9. Resistor 1 6 and resistor 2 11 are connected in series. Resistor 1 6 is electrically connected to the live wire 13, resistor 2 11 is grounded, and the wire between resistor 1 6 and resistor 2 11 is electrically connected to the neutral wire 12. The microwave pulse suppression module 2, the through-core capacitor group 3, the capacitor 5, the common-mode inductor 7, the differential-mode inductor 9, and resistor 2 11 are all installed on the mounting mechanism.

[0027] First, this circuit consists of two common-mode inductors 7 and two differential-mode inductors 9. Theoretically, when common-mode current passes through the common-mode inductors 7, the magnetic flux and flux linkage generated are superimposed, doubling the common-mode inductance. Simultaneously, when differential-mode current passes through the common-mode inductors, the magnetic fluxes cancel each other out, resulting in zero differential-mode inductance. Therefore, the common-mode inductors 7 present high impedance to common-mode current and zero impedance to differential-mode current, effectively filtering out common-mode signals from the circuit. Meanwhile, when differential-mode current passes through differential-mode inductors 9, the magnetic flux and flux linkage generated are superimposed, doubling the differential-mode inductance. Simultaneously, when common-mode current passes through the common-mode inductors, the fluxes cancel each other out, resulting in zero common-mode inductance.

[0028] Therefore, the differential mode inductor 9 shows high impedance to the differential mode current and zero impedance to the common mode current. Its function in the circuit is to filter out the differential mode signal in the circuit.

[0029] The through-core capacitor group 3 is a Y capacitor used to eliminate common-mode interference. It is connected between the neutral line 12 and the ground, and between the live line 13 and the ground. It usually appears in pairs to filter out high-order harmonics, prevent interference, and improve the output voltage quality. Due to the limitation of leakage current, the value of the Y capacitor cannot be too large.

[0030] Capacitor 5 acts as an X capacitor. Generally, its two pins are connected across the neutral line 12 and the live line 13. It is suitable for high frequency, DC, AC, coupling, and is connected across pulse circuits. It can withstand overvoltage shocks and is used in parallel with resistor 1 6 and resistor 2 11 to discharge charge.

[0031] The microwave pulse suppression module 2 is a varistor placed at the circuit terminal to protect the subsequent devices. During normal operation, the impedance between the varistors is very large. Once a high-power pulse energy surges, the varistor will be instantly broken down, presenting a very small impedance and connected to the ground, which can lead all the energy to the ground to protect the subsequent components.

[0032] The installation mechanism includes a filter housing 1, a small bottom plate 8 for the incoming line compartment, and two side partitions 4;

[0033] The small bottom plate 8 of the incoming wire compartment is fixedly mounted on the inner wall of the filter housing 1, and the two side partitions 4 are fixedly mounted on the surface of the small bottom plate 8 of the incoming wire compartment;

[0034] Each group of two through-core capacitor groups 3 is fixedly connected to two side partitions 4, and the two through-core capacitor groups 3 on the left are respectively fixedly connected to an anti-microwave pulse suppression module 2;

[0035] It also includes a grounding screw 10 , which is fixedly mounted on the side partition 4 .

[0036] The grounding screw 10 is inserted into the mounting hole provided on the side partition plate 4 and is locked with the side partition plate 4 by a nut.

[0037] A through hole is provided on the surface of the small bottom plate 8 of the incoming line compartment, and a nut for threaded connection with the waveguide screw is embedded in the through hole.

[0038] When the utility model is used, the waveguide screw is used to lead out the filter cable.

[0039] When the utility model is used, the interference of high-power microwave pulses on sensitive equipment or systems is suppressed by the microwave pulse suppression module 2 arranged in the filter circuit, thereby ensuring normal operation.

[0040] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements will not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A power filter for suppressing high-power microwaves, comprising a mounting mechanism and a filtering circuit, characterized in that: The filter circuit is mounted on the mounting mechanism, and the filter circuit includes two microwave pulse suppression modules (2), a through-core capacitor group (3), eight capacitors (5), a resistor (1) (6), two common-mode inductors (7), two differential-mode inductors (9), a resistor (2) (11), a neutral line (12), and a live line (13); The neutral line (12) and the live line (13) are arranged in parallel, the two anti-microwave pulse suppression modules (2) are connected in series between the neutral line (12) and the live line (13), and the middle parts of the two anti-microwave pulse suppression modules (2) are grounded. There are four through-core capacitor groups (3), and two of them are arranged at both ends of the neutral line (12) and the live line (13). One end of each group of two through-core capacitor groups (3) is electrically connected to the live line (13) and the neutral line (12), and the other end of the through-core capacitor group (3) is grounded. There are two common-mode inductors (7), and one end of the common-mode inductor (7) on the left is electrically connected to the neutral line (12) and the live line (13) on both ends. ), the other sides of the two ends of the magnetic ring wire of the common-mode inductor (7) on the left are respectively electrically connected to one side of the two ends of the magnetic ring wire of the common-mode inductor (7) on the right, and the other sides of the two ends of the magnetic ring wire of the common-mode inductor (7) on the right are respectively electrically connected to one end of the two differential-mode inductors (9), and the other ends of the two differential-mode inductors (9) are respectively electrically connected to the neutral line (12) and the live line (13). The eight capacitors (5) are grouped into two, and the two capacitors (5) in each group are connected in series, and the capacitor (5) on one side is electrically connected to the live line (13) and the capacitor (5) on the other side is grounded. The conductor between the two capacitors (5) connected in series is electrically connected to the neutral line (12).

2. The power supply filter for suppressing high-power microwaves according to claim 1, characterized in that: The four groups of two series-connected capacitors (5) are respectively located on the left side of the left common-mode inductor (7), between the two common-mode inductors (7), between the common-mode inductor (7) and the differential-mode inductor (9), and on the right side of the differential-mode inductor (9). The resistor 1 (6) and the resistor 2 (11) are connected in series. The resistor 1 (6) is electrically connected to the live wire (13), the resistor 2 (11) is grounded, and the conductor between the resistor 1 (6) and the resistor 2 (11) is electrically connected to the neutral wire (12). The microwave pulse suppression module (2), the through-core capacitor group (3), the capacitor (5), the common-mode inductor (7), the differential-mode inductor (9), and the resistor 2 (11) are all installed on the installation mechanism.

3. The power supply filter for suppressing high-power microwaves according to claim 2, characterized in that: The mounting mechanism comprises a filter housing (1), a small bottom plate of an incoming line compartment (8), and two side partitions (4).

4. The power supply filter for suppressing high-power microwaves according to claim 3, characterized in that: The small bottom plate (8) of the incoming wire bin is fixedly mounted on the inner wall of the filter housing (1), and the two side partitions (4) are fixedly mounted on the surface of the small bottom plate (8) of the incoming wire bin.

5. The power supply filter for suppressing high-power microwaves according to claim 4, characterized in that: Each group of two through-core capacitor groups (3) is fixedly connected to two side partitions (4), and the two through-core capacitor groups (3) on the left are fixedly connected to an anti-microwave pulse suppression module (2).

6. The power supply filter for suppressing high-power microwaves according to claim 5, characterized in that: It also includes a grounding screw (10), which is fixedly mounted on the side partition (4).

7. The power supply filter for suppressing high-power microwaves according to claim 6, characterized in that: The grounding screw (10) is inserted into a mounting hole provided on the side partition (4) and is locked with the side partition (4) via a nut.

8. The power supply filter for suppressing high-power microwaves according to claim 7, characterized in that: A through hole is provided on the surface of the small bottom plate (8) of the incoming line bin, and a nut for threaded connection with the waveguide screw is embedded in the through hole.

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