CN114578113A - A Pulse High Voltage Dividing System with Adjustable Proportional Coefficient - Google Patents

Abstract

The invention discloses a pulsed high-voltage voltage dividing system with adjustable proportional coefficient, which has a capacitor voltage-dividing module including a low-voltage arm capacitor and a high-voltage arm capacitor. The inner cylinder, the outer cylinder sleeved on the insulating inner cylinder, the sensing electrode and the first sensing metal sheet arranged on the side of the low-voltage arm capacitor away from the casing of the peaking capacitor, one end of the sensing electrode is fixed in the inner cylinder and is connected with the signal. The collection port is connected, the other end of the sensing electrode is connected to the first sensing metal sheet after passing through the inner cylinder and the low-voltage arm capacitor, and the sensing electrode is electrically connected with the low-voltage arm capacitor. The barrel can move up and down along the extension direction of the sensing electrode relative to the peaking capacitor casing 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 then changing the low voltage arm capacitance and the voltage divider scaling factor of the high voltage arm capacitor.

Description

A Pulse High Voltage Dividing System with Adjustable Proportional Coefficient

technical field

The invention relates to the technical field of high-voltage pulse modulators, in particular to a voltage dividing system.

Background technique

In the field of laser power supplies, peaking capacitors, as the last output device of laser power supplies, work in nanosecond pulse conditions of tens of kilovolts. Establishing a real-time measurement system for peaking capacitor working voltage is an important basis for evaluating the normal operation of laser power supplies. .

Commonly used voltage waveform measurement methods mainly rely on direct contact measurement such as resistance divider and resistance-capacitance divider. The contact-type high-voltage measurement device is often packaged in a large size due to the consideration of insulation and withstand voltage, resulting in a large volume of the voltage divider measurement device, difficult installation, and complicated design. Commonly used inductive voltage dividers are generally based on the principle of capacitive voltage division, such as sticker film capacitors. Due to the fixed film thickness and the fixed sensing distance of such film capacitors, the voltage division ratio is fixed and cannot be adjusted, which limits the signal acquisition equipment. type.

Therefore, it is necessary to design a pulsed high voltage voltage divider system based on capacitive inductive voltage divider, which is small in size, compact in structure, and can adjust the proportional coefficient of the voltage divider.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide a pulsed high-voltage partial pressure system with adjustable proportional coefficient, which can adjust the partial pressure proportional coefficient, so that the partial pressure ratio can be flexibly adjusted to meet the needs of pulsed high-voltage measurement in different occasions.

For achieving the above object, the scheme provided by the invention is:

A pulsed high-voltage voltage divider system with adjustable proportional coefficient includes a capacitor voltage divider module, the capacitor voltage divider module includes a low-voltage arm capacitor and a high-voltage arm capacitor, the low-voltage arm capacitor is fixed at the bottom of the peaking capacitor case, and the high-voltage arm The capacitor includes an insulating inner cylinder, an outer cylinder sleeved on the insulating inner cylinder, a sensing electrode, and a first sensing metal sheet arranged on the side of the low-voltage arm capacitor away from the casing of the peaking capacitor. One end of the sensing electrode is fixed in the inner cylinder and is used to connect with the signal collection port, and the other end of the sensing electrode is connected to the first sensing metal sheet after passing through the inner cylinder and the low-voltage arm capacitor, and the The sensing electrode is capacitively connected to the low-voltage arm, the outer cylinder exposes the top of the peaking capacitor casing, and the outer cylinder can extend along the sensing electrode relative to the peaking capacitor casing The direction moves up and down to adjust the distance between the first sensing metal sheet and the high voltage output end of the peaking capacitor.

As an improvement, the outer cylinder is provided with an external thread for threadedly fitting with the peaking capacitor casing.

As an improvement, the induction electrode is welded with the first induction metal sheet.

As an improvement, the high-voltage arm capacitor further includes a signal transmission coaxial line, and the sensing electrode is connected to the signal acquisition port through the signal transmission coaxial line.

As an improvement, 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, and the first insulating film The film is used to be fixed on the bottom of the peaking capacitor casing, and the sensing electrode is electrically connected with the second sensing metal sheet.

As an improvement, the high-voltage arm capacitor further includes a metal dome sleeved on the sensing electrode, and the sensing electrode is electrically connected to the second sensing metal piece through the metal dome.

As an improvement, the first sensing metal sheet and/or the second sensing metal sheet are copper foils.

As an improvement, the voltage dividing system further includes a secondary voltage dividing module connected to the sensing electrode.

As an improvement, 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 collection port. The other end of R2 is connected to the sensing electrode and grounded, and the signal collection port is connected in parallel with the resistor R2.

The voltage dividing system provided by the present invention can adjust the distance between the first sensing 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 casing, thereby changing the capacitance value of the high-voltage arm capacitor, and then Change 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. In this way, the voltage dividing system can be flexibly adjusted to meet the needs of pulsed high voltage measurement in different occasions, so that it does not need to be limited by the type of signal acquisition equipment.

Description of drawings

In order to explain the embodiments of the present invention or the technical solutions in the prior art more clearly, the following briefly introduces the accompanying drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only These are some embodiments of the present invention, and for those of ordinary skill in the art, other drawings can also be obtained according to the structures shown in these drawings without creative efforts.

1 is a schematic structural diagram of a capacitive voltage dividing module of a voltage dividing system provided by an embodiment of the present invention;

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

3 is a schematic circuit diagram of a voltage dividing system provided in an embodiment of the present invention in a use state;

FIG. 4 is a schematic diagram of the principle of a conventional capacitive voltage divider system.

Description of reference numbers:

(1), capacitor voltage divider module; (2), peaking capacitor chassis; (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), sensing electrode; (11), first sensing metal sheet; (10), metal shrapnel; (12), signal transmission coaxial line (13), insulating inner cylinder; (14), outer cylinder; (16), second insulating film; (17), second induction metal sheet; (18), first insulating film.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to 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, 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 efforts shall fall within the protection scope of the present invention.

It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relationship between various components under a certain posture (as shown in the accompanying drawings). The relative positional relationship, the movement situation, etc., if the specific posture changes, the directional indication also changes accordingly.

It will also be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present.

In addition, the descriptions involving "first", "second", etc. in the present invention are only for descriptive purposes, and should not be understood as indicating or implying their relative importance or implying the number of indicated technical features. Thus, a feature delimited with "first", "second" may expressly or implicitly include at least one of that feature. In addition, the technical solutions between the various embodiments can be combined with each other, but must be based on the realization by those of ordinary skill in the art. When the combination of technical solutions is contradictory or cannot be realized, it should be considered that the combination of technical solutions does not exist. , is not within the scope of protection required by the present invention.

Referring to FIG. 1 to FIG. 3 , a pulsed high-voltage voltage dividing system with adjustable proportionality provided by an embodiment of the present invention includes a capacitive voltage-dividing module (1), and the capacitive voltage-dividing module (1) includes a low-voltage arm capacitor C2 (7) and a high-voltage voltage dividing module (1). The arm capacitor C1 (8), the low-voltage arm capacitor C2 (7) is fixed at the bottom of the peaking capacitor casing (2), and the high-voltage arm capacitor C1 (8) includes an insulating inner cylinder (13), sleeved inside the insulating The outer cylinder (14) on the cylinder (13), the sensing electrode (9), and the first sensing metal sheet (11) arranged on the side of the low-voltage arm capacitor C2 (7) away from the peaking capacitor casing (2) ), one end of the sensing electrode (9) is fixed in the inner cylinder, and is used to connect with the signal acquisition port (6), the other end of the sensing electrode (9) passes through the inner cylinder, the low-voltage arm capacitor C2 (7) and is connected to the first sensing metal The chip (11) is connected, and the sensing electrode (9) is electrically connected with the low-voltage arm capacitor C2 (7), the outer cylinder (14) exposes the top of the peaking capacitor casing (2), and the outer cylinder (14) can be opposite to The peaking capacitor casing (2) moves up and down along the extending direction of the sensing electrode (9) to adjust the distance between the first sensing metal sheet (11) and the high voltage output end of the peaking capacitor (3).

In the voltage dividing system of this embodiment, the distance between the first sensing metal sheet (11) and the high voltage output end of the peaking capacitor (3) can be adjusted by adjusting the position of the outer cylinder (14) relative to the peaking capacitor casing (2). , and then change the capacitance of the high-voltage arm capacitor C1 (8), and then change the voltage division ratio coefficient of the low-voltage arm capacitor C2 (7) and the high-voltage arm capacitor C1 (8), thereby adjusting the amplitude of the output waveform. In this way, the voltage dividing system can be flexibly adjusted to meet the needs of pulsed high voltage measurement in different occasions, so that it does not need to be limited by the type of signal acquisition equipment. In addition, the overall structure of the pressure dividing system of this embodiment is small in size, compact in structure, and convenient in installation, which is favorable for wide-scale popularization and use.

As a preferred embodiment, the outer cylinder (14) is provided with an outer thread for threading with the peaking capacitor casing (2), and the connection between the outer cylinder (14) and the peaking capacitor casing (2) is simple and reliable, and the It is convenient to adjust the positions of the outer cylinder (14) and the capacitor casing, and the position of the high-voltage arm capacitor C1 (8) relative to the peaking capacitor casing (2) can be adjusted by tightening the threads.

Optionally, the sensing electrode (9) is welded with the first sensing metal sheet (11), and the sensing electrode (9) and the first metal sheet are fixed by welding, and the fixing method is firm, and the first sensing metal sheet (11) will not be easily fall off.

Specifically, the first induction metal sheet (11) is copper foil.

Further, the high-voltage arm capacitor C1 (8) further includes a signal transmission coaxial line (12) connected to the sensing electrode (9), and the signal transmission coaxial line (12) is used for outputting signals.

1-3, the low-voltage arm capacitor C2 (7) includes a first insulating film (18), a second insulating film (16) and a capacitor interposed between the first insulating film (18) and the second insulating film (16). The second sensing metal sheet (17), the first insulating film (18) is used to be fixed on the bottom of the peaking capacitor casing (2), and the high-voltage arm capacitor C1 (8) also includes a metal sleeve set on the sensing electrode (9). The shrapnel (10), the sensing electrode (9) is electrically connected to the second sensing metal sheet (17) through the metal shrapnel (10), and the capacitance value of the low-voltage arm capacitor C2 (7) is increased from the second sensing metal sheet (17) to the peaking value The distance of the capacitor casing (2) is determined by the thickness of the first insulating film (18).

Specifically, the second induction metal sheet (17) is copper foil.

Referring to FIG. 3, the voltage dividing system further includes a secondary voltage dividing module connected to the output end of the signal transmission coaxial line (12). The secondary voltage dividing module includes resistors R1 (4) and R2 (5), and the resistor R1 ( One end of 4) is connected to the sensing electrode (9), the other end is connected to the resistor R2 (5) and the signal acquisition port (6), and the other end of the resistor R2 (5) is connected to the sensing electrode (9) and grounded, and the signal acquisition port (6) In parallel with the resistor R2 (5), the high voltage arm capacitor C1 (8) and the low voltage arm capacitor C2 (7) pass through the sensing electrode (9) connected to the first sensing metal sheet (11) and the signal after voltage division The transmission coaxial line (12) leads the signal out, and then divides the voltage through the secondary voltage divider module to further reduce the amplitude of the measured waveform, and obtains a low-voltage waveform consistent with the pulsed high-voltage waveform on the peaking capacitor (3). The port is directly connected to a measuring device such as an oscilloscope to realize the measurement and acquisition of the voltage waveform on the peaking capacitor (3), thereby realizing flexible and accurate measurement of the voltage of the peaking capacitor (3) in the field of laser power supply.

The above descriptions are only the preferred embodiments of the present invention, and are not intended to limit the scope of the present invention. Under the inventive concept of the present invention, the equivalent structural transformations made by the contents of the description and drawings of the present invention, or the direct/indirect application Other related technical fields are included in the scope of patent protection of the present invention.

Claims (9)

1. A pulsed high-voltage voltage divider system with adjustable proportionality coefficient, characterized in that it comprises a capacitor voltage divider module, and the capacitor voltage divider module includes a low-voltage arm capacitor and a high-voltage arm capacitor, and the low-voltage arm capacitor is fixed on a peaking capacitor. At the bottom of the casing, the high-voltage arm capacitor includes an insulating inner cylinder, an outer cylinder sleeved on the insulating inner cylinder, a sensing electrode, and a side of the low-voltage arm capacitor away from the peaking capacitor casing. The first sensing metal sheet, one end of the sensing electrode is fixed in the inner cylinder and used to connect with the 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 electrode. A sensing metal sheet is connected, and the sensing electrode is capacitively connected to the low-voltage arm, the outer cylinder exposes the top of the peaking capacitor case, and the outer cylinder can be opposite to the peaking capacitor The shell moves up and down along the extending 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 pressure dividing system according to claim 1 , wherein the outer cylinder is provided with an outer thread for thread-fitting with the peaking capacitor casing. 3 . 3 . The voltage dividing system of claim 1 , wherein the sensing electrode is welded to the first sensing metal sheet. 4 . 4 . The voltage dividing system according to claim 1 , wherein the high-voltage arm capacitor further comprises a signal transmission coaxial line, and the sensing electrode is connected to the signal acquisition port through the signal transmission coaxial line. 5 . 5. The voltage dividing system according to claim 1, wherein the low-voltage arm capacitor comprises a first insulating film, a second insulating film, and a capacitor sandwiched between the first insulating film and the second insulating film. The second sensing metal sheet, the first insulating film is used to be fixed on the bottom of the peaking capacitor casing, and the sensing electrode is electrically connected to the second sensing metal sheet. 6 . The voltage dividing system according to claim 5 , wherein the high-voltage arm capacitor further comprises a metal dome sleeved on the sensing electrode, and the sensing electrode is connected to the second through the metal dome. 7 . Inductive metal sheets are electrically connected. 7 . The voltage dividing system according to claim 5 , wherein the first sensing metal sheet and/or the second sensing metal sheet are copper foils. 8 . 8 . The voltage dividing system of claim 1 , wherein the voltage dividing system further comprises a secondary voltage dividing module connected to the sensing electrode. 9 . 9. The voltage dividing system according to claim 8, wherein the secondary voltage dividing module comprises 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 collection port, the other end of the resistor R2 is connected to the sensing electrode and grounded, and the signal collection port is connected in parallel with the resistor R2.

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