A pulse high-voltage voltage division system with adjustable proportionality coefficient

Abstract

The invention discloses a pulse high-voltage voltage-dividing system with an adjustable proportional coefficient. The system comprises a capacitor voltage-dividing module including a low-voltage arm capacitor and a high-voltage arm capacitor. The low-voltage arm capacitor is fixed at the bottom of a peaking capacitor housing. The high-voltage arm capacitor comprises an insulating inner cylinder, an outer cylinder sleeved on the insulating inner cylinder, a sensing electrode and a first sensing metal sheet arranged on a side of the low-voltage arm capacitor away from the peaking capacitor housing. One end of the sensing electrode is fixed in the inner cylinder and connected to a signal acquisition port. The other end of the sensing electrode passes through the inner cylinder and the low-voltage arm capacitor and is connected to the first sensing metal sheet. The sensing electrode is electrically connected to the low-voltage arm capacitor. The outer cylinder is exposed from the top of the peaking capacitor housing. The outer cylinder can move up and down relative to the peaking capacitor housing along the extension direction of the sensing electrode to adjust the distance between the first sensing metal sheet and the high-voltage output end of the peaking capacitor, thereby changing the capacitance of the high-voltage arm capacitor, and thereby changing the voltage-dividing proportional coefficient of the low-voltage arm capacitor and the high-voltage arm capacitor.

Description

Technical Field

[0001] The invention relates to the technical field of high-voltage pulse modulators, and in particular to a voltage dividing system. Background Art

[0002] In the field of laser power supplies, peaking capacitors are the last-stage output devices of laser power supplies and operate under nanosecond pulse conditions of tens of kilovolts. Establishing a real-time measurement system for the working voltage of peaking capacitors is an important basis for evaluating the normal operation of laser power supplies.

[0003] Commonly used voltage waveform measurement methods mainly rely on direct contact measurement such as resistor voltage division and resistor-capacitor voltage division. For insulation and withstand voltage considerations, contact-type high-voltage measurement devices often have larger components, resulting in large-volume voltage division measurement devices, difficult installation, and complex design. Commonly used inductive voltage dividers are generally based on the principle of capacitive voltage division. For example, adhesive film capacitors have a fixed film thickness and a fixed sensing distance, which results in a fixed and unadjustable voltage division ratio, limiting the type of signal acquisition equipment.

[0004] Therefore, it is necessary to design a pulse high-voltage voltage division system based on capacitive inductive voltage division, which has a small size, compact structure and adjustable voltage division ratio coefficient. Summary of the invention

[0005] The object of the present invention is to provide a pulse high voltage voltage dividing system with adjustable proportional coefficient, which can adjust the voltage dividing proportional coefficient so that the voltage dividing ratio can be flexibly adjusted to meet the needs of pulse high voltage measurement in different occasions.

[0006] To achieve the above object, the solution provided by the present invention is:

[0007] A pulse high-voltage voltage-dividing system with an adjustable proportional coefficient comprises a capacitor voltage-dividing module, wherein the capacitor voltage-dividing module comprises a low-voltage arm capacitor and a high-voltage arm capacitor, wherein the low-voltage arm capacitor is fixed at the bottom of a peaking capacitor housing, wherein the high-voltage arm capacitor comprises an insulating inner cylinder, an outer cylinder sleeved on the insulating inner cylinder, a sensing electrode, and a first sensing metal sheet arranged on a side of the low-voltage arm capacitor away from the peaking capacitor housing, wherein one end of the sensing electrode is fixed in the inner cylinder and used for connecting to a signal acquisition port, and the other end of the sensing electrode passes through the inner cylinder and the low-voltage arm capacitor and is connected to the first sensing metal sheet, and the sensing electrode is electrically connected to the low-voltage arm capacitor, wherein the outer cylinder is exposed from the top of the peaking capacitor housing, and the outer cylinder can move up and down relative to the peaking capacitor housing along the extension direction of the sensing electrode to adjust the distance between the first sensing metal sheet and the high-voltage output end of the peaking capacitor.

[0008] As an improved manner, the outer cylinder is provided with an external thread for cooperating with the thread of the peaking capacitor housing.

[0009] As an improved method, the induction electrode is welded to the first induction metal sheet.

[0010] As an improved method, the high-voltage arm capacitor further includes a signal transmission coaxial cable, and the induction electrode is connected to the signal acquisition port through the signal transmission coaxial cable.

[0011] As an improved method, the low-voltage arm capacitor includes a first insulating film, a second insulating film, and a second induction metal sheet sandwiched between the first insulating film and the second insulating film. The first insulating film is used to be fixed at the bottom of the peaking capacitor housing, and the induction electrode is electrically connected to the second induction metal sheet.

[0012] As an improved method, the high-voltage arm capacitor further includes a metal spring sheet sleeved on the induction electrode, and the induction electrode is electrically connected to the second induction metal sheet through the metal spring sheet.

[0013] As an improved method, the first induction metal sheet and / or the second induction metal sheet is / are copper foil.

[0014] As an improved method, the voltage division system further includes a secondary voltage division module connected to the induction electrode.

[0015] As an improved method, the secondary voltage division module includes a resistor R1 and a resistor R2. One end of the resistor R1 is connected to the induction electrode, the other end is connected to the resistor R2 and the signal acquisition port. The other end of the resistor R2 is connected to the induction electrode and grounded, and the signal acquisition port is connected in parallel with the resistor R2.

[0016] The voltage division system provided by the present invention can adjust the distance between the first induction metal sheet and the high-voltage output end of the peaking capacitor by adjusting the position of the outer cylinder relative to the peaking capacitor housing, thereby changing the capacitance value of the high-voltage arm capacitor, and further changing the voltage division ratio coefficient of the low-voltage arm capacitor and the high-voltage arm capacitor, so as to adjust the amplitude of the output waveform. Such a design can flexibly adjust the voltage division system to meet the requirements of pulse high-voltage measurement in different scenarios, making it not limited by the type of signal acquisition equipment. Description of the Drawings

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on the structures shown in these drawings.

[0018] Figure 1It is a schematic structural diagram of a capacitive voltage division module of a voltage division system provided by an embodiment of the present invention;

[0019] Figure 2 It is a schematic structural diagram of a low-voltage arm capacitor provided by an embodiment of the present invention;

[0020] Figure 3 It is a schematic circuit diagram of the voltage division system in the operating state provided by an embodiment of the present invention;

[0021] Figure 4 It is a schematic principle diagram of a conventional capacitive voltage division system.

[0022] Explanation of the reference numerals in the attached drawings:

[0023] (1), capacitive voltage division module; (2), peaking capacitor housing; (3), peaking capacitor; (4), resistor R1; (5), resistor R2; (6), signal acquisition port; (7), low-voltage arm capacitor C2; (8), high-voltage arm capacitor C1; (9), induction electrode; (11), first induction metal sheet; (10), metal shrapnel; (12), signal transmission coaxial cable; (13), insulating inner cylinder; (14), outer cylinder; (16), second insulating film; (17), second induction metal sheet; (18), first insulating film. Specific embodiments

[0024] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than 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 making creative efforts shall fall within the protection scope of the present invention.

[0025] It should be noted that all directional indications (such as up, down, left, right, front, back...) in the embodiments of the present invention are only used to explain the relative positional relationship and movement conditions between components in a specific posture (as shown in the drawings). If the specific posture changes, the directional indications will also change accordingly.

[0026] It should also be noted that when an element is referred to as "fixed to" or "disposed on" another element, it can be directly on the other element or there may be an intermediate element at the same time. When an element is referred to as "connected" to another element, it can be directly connected to the other element or there may be an intermediate element at the same time.

[0027] In addition, the descriptions involving "first", "second", etc. in the present invention are for descriptive purposes only, and should not be construed as indicating or implying their relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions between various embodiments may be combined with each other, but it must be based on the ability of those of ordinary skill in the art to implement. When the combination of technical solutions results in contradictions or inability to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0028] Referring to Figures 1 - 3 , the pulse high-voltage voltage division system with adjustable proportionality coefficient provided by the embodiment of the present invention includes a capacitive voltage division module (1). The capacitive voltage division module (1) includes a low-voltage arm capacitor C2 (7) and a high-voltage arm capacitor C1 (8). The low-voltage arm capacitor C2 (7) is fixed at the bottom of the peaking capacitor housing (2). The high-voltage arm capacitor C1 (8) includes an insulating inner cylinder (13), an outer cylinder (14) sleeved on the insulating inner cylinder (13), an induction electrode (9), and a first induction metal sheet (11) disposed on the side of the low-voltage arm capacitor C2 (7) facing away from the peaking capacitor housing (2). One end of the induction electrode (9) is fixed inside the inner cylinder and is used to connect to the signal acquisition port (6). The other end of the induction electrode (9) passes through the inner cylinder and the low-voltage arm capacitor C2 (7) and then connects to the first induction metal sheet (11), and the induction electrode (9) is electrically connected to the low-voltage arm capacitor C2 (7). The outer cylinder (14) exposes the top of the peaking capacitor housing (2), and the outer cylinder (14) can move up and down relative to the peaking capacitor housing (2) along the extension direction of the induction electrode (9) to adjust the distance between the first induction metal sheet (11) and the high-voltage output end of the peaking capacitor (3).

[0029] The voltage division system of this embodiment can adjust the distance between the first induction metal sheet (11) and the high-voltage output end of the peaking capacitor (3) by adjusting the position of the outer cylinder (14) relative to the peaking capacitor housing (2), thereby changing the capacitance value of the high-voltage arm capacitor C1 (8), and further changing the voltage division proportionality coefficient of the low-voltage arm capacitor C2 (7) and the high-voltage arm capacitor C1 (8), so as to adjust the amplitude of the output waveform. With such a design, the voltage division system can be flexibly adjusted to meet the requirements of pulse high-voltage measurement in different scenarios, without being limited by the type of signal acquisition equipment. Moreover, the overall structure of the voltage division system of this embodiment is small in size, compact in structure, and convenient to install, which is conducive to wide promotion and use.

[0030] As a preferred embodiment, the outer cylinder (14) is provided with an external thread for threaded engagement with the peaking capacitor housing (2). The connection between the outer cylinder (14) and the peaking capacitor housing (2) is simple and reliable, and it is also convenient to adjust the position of the outer cylinder (14) relative to the capacitor housing. By tightening or loosening the thread, the position of the high-voltage arm capacitor C1 (8) relative to the peaking capacitor housing (2) can be adjusted.

[0031] Optionally, the induction electrode (9) is welded to the first induction metal sheet (11). By welding, the induction electrode (9) is fixed to the first metal sheet, and the fixing method is firm, so that the first induction metal sheet (11) will not fall off easily.

[0032] Specifically, the first induction metal sheet (11) is a copper foil.

[0033] Further, the high-voltage arm capacitor C1 (8) further includes a signal transmission coaxial cable (12) connected to the induction electrode (9), and the signal transmission coaxial cable (12) is used to output signals.

[0034] Refer to Figures 1 - 3 , the low-voltage arm capacitor C2 (7) includes a first insulating film (18), a second insulating film (16), and a second induction metal sheet (17) sandwiched between the first insulating film (18) and the second insulating film (16). The first insulating film (18) is used to be fixed at the bottom of the peaking capacitor housing (2). The high-voltage arm capacitor C1 (8) further includes a metal spring piece (10) sleeved on the induction electrode (9). The induction electrode (9) is electrically connected to the second induction metal sheet (17) through the metal spring piece (10). The capacitance value of the low-voltage arm capacitor C2 (7) is determined by the distance from the second induction metal sheet (17) to the peaking capacitor housing (2), that is, the thickness of the first insulating film (18).

[0035] Specifically, the second induction metal sheet (17) is a copper foil.

[0036] Refer to Figure 3, the voltage dividing system further includes a secondary voltage dividing module connected to the output end of the signal transmission coaxial cable (12). The secondary voltage dividing module includes a resistor R1 (4) and a resistor R2 (5). One end of the resistor R1 (4) is connected to the induction electrode (9), and the other end is connected to the resistor R2 (5) and the signal acquisition port (6). The other end of the resistor R2 (5) is connected to the induction electrode (9) and grounded. The signal acquisition port (6) is in parallel with the resistor R2 (5). The high-voltage arm capacitor C1 (8) and the low-voltage arm capacitor C2 (7) are voltage-divided, and the signal is led out through the induction electrode (9) connected to the first induction metal sheet (11) and the signal transmission coaxial cable (12), and then voltage-divided by the secondary voltage dividing module to further reduce the amplitude of the measured waveform, obtaining a low-voltage waveform consistent with the pulsed high-voltage waveform on the peaking capacitor (3). Then, the voltage waveform on the peaking capacitor (3) is measured and acquired by directly connecting a measuring device such as an oscilloscope through the acquisition port, realizing flexible and accurate measurement of the voltage of the peaking capacitor (3) in the field of laser power supplies.

[0037] The above are only the preferred embodiments of the present invention, and do not limit the patent scope of the present invention. Any equivalent structural transformation made under the inventive concept of the present invention by using the content of the specification and drawings of the present invention, or direct / indirect application in other related technical fields, is included in the patent protection scope of the present invention.

Claims

1. A pulse high-voltage voltage division system with adjustable proportionality coefficient, characterized in that, The invention comprises a capacitor voltage divider module, wherein the capacitor voltage divider module comprises a low-voltage arm capacitor and a high-voltage arm capacitor, wherein the low-voltage arm capacitor is fixed at the bottom of a peaking capacitor housing, wherein the high-voltage arm capacitor comprises an insulating inner cylinder, an outer cylinder sleeved on the insulating inner cylinder, a sensing electrode, and a first sensing metal sheet disposed on a side of the low-voltage arm capacitor away from the peaking capacitor housing, wherein one end of the sensing electrode is fixed in the inner cylinder and used for connecting with a signal acquisition port, and the other end of the sensing electrode passes through the inner cylinder and the low-voltage arm capacitor and is connected with the first sensing metal sheet, and the sensing electrode is electrically connected with the low-voltage arm capacitor, wherein the outer cylinder is exposed from the top of the peaking capacitor housing, the outer cylinder is provided with an external thread for mating with the thread of the peaking capacitor housing, and the outer cylinder can move up and down relative to the peaking capacitor housing along the extension direction of the sensing electrode to adjust the distance between the first sensing metal sheet and the high-voltage output end of the peaking capacitor.

2. The voltage dividing system according to claim 1, wherein The sensing electrode is welded to the first sensing metal sheet.

3. The voltage dividing system according to claim 1, wherein The high-voltage arm capacitor further includes a signal transmission coaxial line, and the sensing electrode is connected to the signal acquisition port via the signal transmission coaxial line.

4. The voltage dividing system according to claim 1, characterized in that, The low-voltage arm capacitor includes a first insulating film, a second insulating film and a second sensing metal sheet sandwiched between the first insulating film and the second insulating film. The first insulating film is used to be fixed on the bottom of the peaking capacitor housing. The sensing electrode is electrically connected to the second sensing metal sheet.

5. The voltage dividing system according to claim 4, wherein The high-voltage arm capacitor further includes a metal spring sleeved on the sensing electrode, and the sensing electrode is electrically connected to the second sensing metal sheet via the metal spring sleeve.

6. The voltage dividing system according to claim 4, wherein The first sensing metal sheet and / or the second sensing metal sheet are copper foils.

7. The voltage dividing system according to claim 1, wherein The voltage division system further includes a secondary voltage division module connected to the sensing electrode.

8. The voltage dividing system according to claim 7, wherein The secondary voltage dividing module includes a resistor R1 and a resistor R2, one end of the resistor R1 is connected to the sensing electrode, and the other end is connected to the resistor R2 and the signal acquisition port, the other end of the resistor R2 is connected to the sensing electrode and grounded, and the signal acquisition port is connected in parallel with the resistor R2.

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