CN110855273A - Arc-shaped solid-state pulse forming line and design method thereof - Google Patents

Abstract

The invention discloses an arc-shaped solid-state pulse forming line and a design method thereof. The pulse forming line at least comprises an upper arc-shaped metal plate, a lower arc-shaped metal plate and a plurality of ceramic capacitors, and the ceramic capacitors are arranged side by side between the upper arc-shaped metal plate and the lower arc-shaped metal plate, and the two ends of the ceramic capacitor are respectively electrically connected to the upper arc-shaped metal plate and the lower arc-shaped metal plate; the The upper arc-shaped metal plate is also provided with an upper metal plate charging port and an upper electrode tip; the lower arc-shaped metal plate is also provided with a lower metal plate charging port and a lower electrode tip; the upper electrode tip and the lower electrode The heads are staggered from each other and discharge upwards and downwards, respectively. The device of the invention has the characteristics of small size and light weight, and a plurality of arc-shaped solid-state pulse forming wires can be easily combined to form a coaxial structure, which can effectively reduce the volume and weight of the high-impedance and high-voltage pulse generating device.

Description

A kind of arc-shaped solid-state pulse forming line and design method thereof

technical field

The invention belongs to the technical field of pulse power, and in particular relates to an arc-shaped solid-state pulse forming wire and a design method thereof.

Background technique

Pulse forming line is a technology used to generate high-power electric pulse in pulse power technology, which has been widely used at home and abroad. In large-scale high-power or ultra-high-power pulse devices, deionized water or transformer oil is generally used as the energy storage medium for the pulse forming line to withstand the working voltage of megavolts and generate electric pulses with a pulse width of hundreds of nanoseconds. The size of the pulse-like forming lines is very large, with lengths of several meters or even tens of meters, and weights of several tons.

Pulse forming lines with working voltages of tens of kilovolts generally use solid insulating materials as energy storage media. Since there is no liquid medium, it is more convenient to use and maintain. However, in order to make the pulse power device have smaller volume and lighter weight, the pulse-forming line energy storage medium needs to have higher energy storage density, larger dielectric coefficient and better structural design.

SUMMARY OF THE INVENTION

The purpose of the present invention is: in order to overcome the problems of the prior art, a circular arc-shaped solid-state pulse forming line and a design method thereof are provided. Light weight, the flat top proportion of the square wave pulse generated by discharge is high, and the output voltage reaches tens of kilovolts. In addition, a plurality of arc-shaped solid-state pulse forming wires can be easily combined to form a coaxial structure, which can effectively reduce the volume and weight of the high-voltage pulse generating device.

The object of the present invention is achieved through the following technical solutions:

计算出形成线的特征阻抗，通过设置参数w、1、H以达到Z₁＝Z₀。An arc-shaped solid-state pulse forming wire and a design method thereof, the pulse forming wire at least comprises an upper arc-shaped metal plate, a lower arc-shaped metal plate and a plurality of ceramic capacitors, and the ceramic capacitors are arranged side by side on the upper between the arc-shaped metal plate and the lower arc-shaped metal plate, and the two ends of the ceramic capacitor are respectively electrically connected to the upper arc-shaped metal plate and the lower arc-shaped metal plate; The metal plate is also provided with an upper metal plate charging port and an upper electrode tip; the lower arc-shaped metal plate is also provided with a lower metal plate charging port and a lower electrode tip; the upper electrode tip and the lower electrode tip are in the horizontal direction staggered from each other and discharge upward and downward respectively, wherein the height h of the ceramic capacitor, the width w and the centerline length l of the upper and/or lower arc-shaped metal plate, and the upper arc-shaped metal plate The distance H between the lower arc-shaped metal plate and the lower arc-shaped metal plate is configured by the following method: Step S1: According to the user's requirements for the characteristic impedance Z ₀ and the pulse width t ₀ of the pulse forming line, calculate the capacitance C=Z ₀ ×t of the energy storage capacitor ₀ ; Step S2: Calculate the height h of the ceramic capacitor according to the working voltage U ₀ , the capacitance C of the energy storage capacitor and the withstand voltage characteristic of the energy storage medium of the ceramic capacitor; Step S3: then calculate the height h of the ceramic capacitor, the circular arc The width w of the shaped metal plate and the length of the center line 1, the distance H between the upper and lower electrodes are calculated by simulation to calculate the inductance L of the formed line; Step S4: by

The characteristic impedance of the formed line is calculated by setting the parameters w, 1, H to achieve Z ₁ =Z ₀ .

According to a preferred embodiment, each ceramic capacitor is connected in parallel between the upper arc-shaped metal plate and the lower arc-shaped metal plate.

According to a preferred embodiment, a switch device is provided between the charging power source and the upper metal plate charging port or the lower metal plate charging port.

According to a preferred embodiment, a switching device is provided between the resistive load and the upper electrode tip or the lower electrode tip.

According to a preferred embodiment, the resistive load is further provided with a load ground terminal electrode, which is grounded through the load ground terminal electrode.

According to a preferred embodiment, the shape and size of the upper circular arc-shaped metal plate and the lower circular arc-shaped metal plate are the same, and are composed of copper plates.

According to a preferred embodiment, the arc angle of the upper circular arc-shaped metal plate and the lower circular arc-shaped metal plate is set between 140° and 170°. Preferably, the arc angle of the upper arc-shaped metal plate and the lower arc-shaped metal plate is set to 160°.

According to a preferred embodiment, the outer arc radius of the upper arc-shaped metal plate or the lower arc-shaped metal plate is 142 mm, the inner arc radius is 106 mm, the center line arc length is 368 mm, and the total thickness is 15.5 mm.

According to a preferred embodiment, the ceramic capacitors are arranged along the center line of the upper circular arc-shaped metal plate or the lower circular arc-shaped metal plate at intervals of 1 mm to 2 mm.

The aforementioned main scheme of the present invention and each of its further options can be freely combined to form multiple schemes, which are all schemes that can be adopted and claimed in the present invention; can also be freely combined. After understanding the solutions of the present invention, those skilled in the art can understand that there are various combinations according to the prior art and common knowledge, all of which are the technical solutions to be protected by the present invention, and are not exhaustive here.

The beneficial effects of the present invention: through the structural design of the arc-shaped solid-state pulse forming line of the present invention, the ceramic capacitors are arranged along the semi-circular arc to form the pulse forming line with the upper and lower metal plates. Line length and other parameters can be adjusted to form line characteristic impedance, operating voltage, and output pulse width. It is easy to form a coaxial structure by combining multiple arc-shaped solid-state pulse forming lines, and the structure design of the upper and lower electrode heads staggered can reduce the height of multiple arc-shaped solid-state pulse forming lines when they are stacked, so that the high-voltage pulse generating device It is more compact, has smaller volume and lighter weight, and is suitable for the development of equipment such as compact high-impedance pulse power sources and the application of high-voltage fast pulses.

Description of drawings

Fig. 1 is the structural representation of the present invention;

Fig. 2 is the circuit principle schematic diagram of the present invention;

Among them, 1-upper arc-shaped metal plate, 2-lower arc-shaped metal plate, 3-ceramic capacitor, 4-upper metal plate charging port, 5-lower metal plate charging port, 6-upper electrode head, 7-lower Electrode head, 8-resistive load, 9-load ground terminal electrode.

Detailed ways

The embodiments of the present invention are described below through specific specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the following embodiments and features in the embodiments may be combined with each other under the condition of no conflict.

It should be noted that, in order to make the purposes, technical solutions and advantages of the embodiments of the present invention clearer, 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 some, but not all, of the embodiments of the present invention. The components of the embodiments of the invention generally described and illustrated in the drawings herein may be arranged and designed in a variety of different configurations.

Thus, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the invention as claimed, but is merely representative of selected embodiments of the invention. 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 like numerals and letters refer to like items in the following figures, so once an item is defined in one figure, it does not require further definition and explanation in subsequent figures.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. The indicated orientation or positional relationship is based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship that the product of the invention is usually placed in use, only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying The device or element referred to must have a particular orientation, be constructed and operate in a particular orientation, and therefore should not be construed as limiting the invention. Furthermore, the terms "first", "second", "third", etc. are only used to differentiate the description and should not be construed as indicating or implying relative importance.

Furthermore, the terms "horizontal", "vertical", "overhanging" etc. do not imply that a component is required to be absolutely horizontal or overhang, but rather may be slightly inclined. For example, "horizontal" only means that its direction is more horizontal than "vertical", it does not mean that the structure must be completely horizontal, but can be slightly inclined.

In the description of the present invention, it should also be noted that, unless otherwise expressly specified and limited, the terms "arranged", "installed", "connected" and "connected" should be understood in a broad sense, for example, it may be a fixed connection, It can also be a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or the internal communication between the two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood in specific situations.

In addition, the present invention should point out that, in the present invention, if the specific structure, connection relationship, positional relationship, power source relationship, etc. are not specifically written, the structure, connection relationship, positional relationship, power source relationship involved in the present invention etc. are all available to those skilled in the art on the basis of the prior art and can be known without creative work.

Example 1:

Referring to FIG. 1 , a circular arc-shaped solid-state pulse forming line and a design method thereof are shown.

Specifically, the pulse forming line includes at least an upper arc-shaped metal plate 1 , a lower arc-shaped metal plate 2 and several ceramic capacitors 3 . The ceramic capacitors 3 are arranged side by side between the upper arc-shaped metal plate 1 and the lower arc-shaped metal plate 2 . In addition, both ends of the ceramic capacitor 3 are electrically connected to the upper arc-shaped metal plate 1 and the lower arc-shaped metal plate 2 respectively.

Preferably, each ceramic capacitor 3 is connected in parallel between the upper arc-shaped metal plate 1 and the lower arc-shaped metal plate 2 .

Preferably, the upper circular arc-shaped metal plate 1 and the lower circular arc-shaped metal plate 2 have the same shape and size, and are composed of copper plates.

Preferably, the arc angle of the upper arc-shaped metal plate 1 and the lower arc-shaped metal plate 2 can be set to be between 140° and 170°.

Further, in one embodiment, the arc angle of the upper arc-shaped metal plate 1 and the lower arc-shaped metal plate 2 is set to 160°. And the outer arc radius of the upper arc-shaped metal plate 1 or the lower arc-shaped metal plate 2 is 142 mm, the inner arc radius is 106 mm, the center line arc length is 368 mm, and the total thickness is 15.5 mm. The ceramic capacitor 3 uses eight barium titanate composite ceramic capacitors with a capacitance of 1.5nF. It can achieve the highest charging voltage of more than 60kV, and generate a square wave pulse with a pulse front edge of less than 5ns, a full width at half maximum of 66ns on a 2.4Ω impedance matching load, and a flat top voltage of more than 30kV.

Preferably, the ceramic capacitors are arranged along the center line of the upper circular arc-shaped metal plate or the lower circular arc-shaped metal plate at intervals of 1 mm-2 mm.

Preferably, the upper arc-shaped metal plate 1 is further provided with an upper metal plate charging port 4 and an upper electrode head 6 .

Preferably, the lower arc-shaped metal plate 2 is further provided with a lower metal plate charging port 5 and a lower electrode head 7 .

Preferably, a charging power source is provided between the upper metal plate charging port 4 and the lower metal plate charging port 5 when demonstrating how a single arc-shaped solid-state pulse forming line generates a high-voltage square wave pulse. The charging of the ceramic capacitor 3 between the upper arc-shaped metal plate 1 and the lower arc-shaped metal plate 2 is completed by the charging power source. A switch device is provided between the charging power source and the upper metal plate charging port 4 or the lower metal plate charging port 5 . Preferably, a resistive load 8 is provided between the upper electrode tip 6 and the lower electrode tip 7 . A switching device is provided between the resistive load 8 and the upper electrode tip 6 or the lower electrode tip 7 . The upper electrode head 6 and the lower electrode head 7 complete the release of high-voltage square wave pulses to the resistive load 8 . Further, the resistive load 8 is further provided with a load ground terminal electrode 9 , which is grounded through the load ground terminal electrode 9 .

As shown in Figure 2, the figure also discloses the circuit schematic diagram of the pulse forming line. In Figure 1, U is the charging power supply, S1 is the charging switch, C1-Cn are n ceramic capacitors with the same capacitance, L1-Ln are the distributed inductance formed on the arc-shaped electrodes; S2 is the discharge switch, and RL is the discharge load.

Preferably, the ceramic capacitors C1-Cn are connected in parallel to both ends of the charging power source. And the discharge load RL is connected in parallel with each ceramic capacitor. When the switch S1 is closed and the switch S2 is opened, the capacitors are charged. When the switch S1 is opened and the switch S2 is closed, the discharge of the discharge load is realized.

Preferably, the design or preparation method of the arc-shaped solid-state pulse forming wire includes:

Step S1: Calculate the capacitance C=Z ₀ ×t ₀ of the energy storage capacitor according to the user's requirements for forming the characteristic impedance Z ₀ of the line and the pulse width t ₀ .

Step S2: Design the height h and the number of ceramic capacitors according to the working voltage U ₀ , the capacitance C of the energy storage capacitor, and the withstand voltage characteristics of the energy storage medium of the ceramic capacitor.

Step S3: The inductance L of the formed line is simulated and calculated from the height h of the ceramic capacitor, the width w of the arc-shaped metal plate, the length l of the center line, and the distance H between the upper and lower electrodes or the upper and lower arc-shaped metal plates.

计算出形成线的特征阻抗，通过调整w、l、H参数达到Z₁＝Z₀。Step S4: by

The characteristic impedance of the formed line is calculated, and Z ₁ =Z ₀ is achieved by adjusting the w, l, and H parameters.

Preferably, the design also requires that the ceramic capacitors are arranged at intervals of 1mm-2mm along the centerline of the arc-shaped metal plate. Finally, each design parameter is optimized in the direction of reducing the size of the formed wire.

The pulse forming line of the present invention uses ceramic capacitors with high energy storage density as energy storage units, and a plurality of ceramic capacitors with the same capacitance are arranged along a circular arc line (less than 1/2 circle), and are connected with the upper and lower circular arc (less than 1/2 circle). 1/2 circle) metal plates are connected together, and the same end of the upper and lower arc-shaped metal plates protrudes a certain length in a certain direction as the discharge switch electrode. The ceramic capacitor is charged through the upper and lower arc metal plates, and after the discharge switch is turned on, a high-voltage square wave pulse is generated on the load. At the same time, by adjusting the parameters of the ceramic capacitor, the width and spacing of the upper and lower copper plates, and the length of the formed line, the characteristic impedance of the formed line, the working voltage, the output pulse width, etc. can be adjusted, and it is easy to combine to form a coaxial structure, which can effectively reduce the high voltage pulse. The volume and weight of the resulting device.

The foregoing basic examples of the present invention and their further selected examples can be freely combined to form multiple embodiments, which are all embodiments that can be adopted and claimed in the present invention. In the scheme of the present invention, each selection example can be arbitrarily combined with any other basic example and selection example.

The above descriptions are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present invention shall be included in the protection of the present invention. within the range.

Claims (4)

1. An arc-shaped solid-state pulse forming line and a design method thereof, characterized in that the pulse forming line at least comprises an upper arc-shaped metal plate (1), a lower arc-shaped metal plate (2) and several ceramic capacitors (3), The ceramic capacitors (3) are arranged side by side between the upper arc-shaped metal plate (1) and the lower arc-shaped metal plate (2), and two ends of the ceramic capacitor (3) are respectively connected to the The upper arc-shaped metal plate (1) is electrically connected with the lower arc-shaped metal plate (2); the upper arc-shaped metal plate (1) is further provided with an upper metal plate charging port (4) and an upper electrode tip (6); the lower arc-shaped metal plate (2) is also provided with a lower metal plate charging port (5) and a lower electrode head (7); the upper electrode head (6) and the lower electrode head (7) The settings are staggered from each other and discharge upward and downward respectively; Wherein, the height h of the ceramic capacitor (3), the width w and the centerline length 1 of the upper arc-shaped metal plate (1) and/or the lower arc-shaped metal plate (2), and the upper arc-shaped metal plate (1) ) and the distance H between the lower arc-shaped metal plate (2) is configured as follows: Step S1: Calculate the capacitance C=Z ₀ ×t ₀ of the energy storage capacitor according to the user’s requirements for the characteristic impedance Z ₀ and the pulse width t ₀ of the pulse forming line; Step S2: Calculate the height h of the ceramic capacitor according to the working voltage U ₀ , the capacitance C of the energy storage capacitor and the withstand voltage characteristic of the energy storage medium of the ceramic capacitor; Step S3: the inductance L of the formed line is simulated and calculated from the height h of the ceramic capacitor, the width w of the arc-shaped metal plate, the length l of the center line, and the distance H between the upper and lower electrodes; Step S4: by

The characteristic impedance of the formed line is calculated by setting the parameters w, l, H to achieve Z ₁ =Z ₀ . 2. A circular arc-shaped solid-state pulse forming line and design method thereof as claimed in claim 1, characterized in that, each ceramic capacitor (3) is arranged on the upper circular arc-shaped metal plate (1) in a parallel connection mode. ) and the lower arc-shaped metal plate (2). 3. A circular arc-shaped solid-state pulse forming line and design method thereof as claimed in claim 1, characterized in that, the plates of the upper circular arc-shaped metal plate (1) and the lower circular arc-shaped metal plate (2) The body shape and size are the same, and it is made of copper plate; The arc angle of the upper arc-shaped metal plate (1) and the lower arc-shaped metal plate (2) is set between 140° and 170°. 4. A circular arc-shaped solid-state pulse forming line and design method thereof as claimed in claim 1, wherein the upper circular arc-shaped metal plate (1) and the lower circular arc-shaped metal plate (2) have the same The electrode tips at the ends are staggered from each other in the horizontal direction.