CN106158077B - A kind of radial direction three board transmission line of Transmission Convergence pulse current - Google Patents
A kind of radial direction three board transmission line of Transmission Convergence pulse current Download PDFInfo
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- CN106158077B CN106158077B CN201610460404.8A CN201610460404A CN106158077B CN 106158077 B CN106158077 B CN 106158077B CN 201610460404 A CN201610460404 A CN 201610460404A CN 106158077 B CN106158077 B CN 106158077B
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B5/00—Non-insulated conductors or conductive bodies characterised by their form
Abstract
The present invention relates to a kind of board transmission line of radial direction three of Transmission Convergence pulse current, including interior electrode, external electrode and multiple cable connector holes, definition three board transmission lines of radial direction are cross section perpendicular to the section of power transmission direction, the cross section of external electrode and interior electrode is I-shaped, and external electrode offers the I-shaped cavity to match with interior electrode shape and size, interior electrode is nested in external electrode along transmission direction and has gap between external electrode；Deionized water is filled as dielectric in the gap of inside and outside electrode.The cross section of three board transmission lines of the invention is in " work " font, is essentially the parallel connection of three three conventional Plate-Transmission-Lines, therefore its characteristic impedance reduces by 1/3, and has the advantages of flexible adjustment, easy to use.
Description
Technical field
The invention belongs to high power pulse transmission field, is related to a kind of three plate pulse transmission lines, for realizing that tens of roads are high
The radial transport of power pulse high current and space convergence, have important application in the large-scale pulse power device such as Z constrictions.
Background technology
Ultra high power pulse technique is that thermal extremes, high pressure, high-energy-density and intense radiation etc. are obtained in laboratory extremely
The important means of Physical Experiment condition, ground in front line sciences such as material property experiment, Z constrictions inertial confinement fusion and radiation effects
There is important application in studying carefully.High pulse power technology is compressed from time scale to energy, is surpassed in very short time
High-peak power；On the other hand, convergence is transmitted to energy from space scale, it is close that ultra high power is obtained in very small dimensions
Degree.Burst length yardstick compression generally use energy storage device (such as capacitor, forming line) is by switching quick release of energy mode
Obtain, generally require that what compression could obtain the short pulses of hundred nanosecond orders, as Sandia National Laboratories of the U.S. Z with
ZR, " gather imperial No.1 " PTS devices etc. of China Engineering Physics Research Institute, are held, pulse using storing up electricity in Marx generators, aqueous medium
Form line three stage compression.Fast pulse Linear transformer driver (LTD) can directly obtain the short pulse of hundred nanoseconds in recent years.Space
In terms of yardstick, because the energy storage of superhigh pulse power device is up to tens of to hundred MJ, primary energy unit volume is huge, and size generally exists
More than tens of rice, such as the driving source Z-800 for Z constriction fusion energy resources that U.S. Sandia laboratories Stygar is proposed, diameter
About 54m, and payload size (such as load of Z hoop fibre arrays, MagLIF magnetic sleeves) is generally only centimetres, therefore, it is necessary to pass through
High power pulse transmission line realizes transmission and convergence of the energy from pulse power driving source to load.Superelevation work(the most frequently used at present
Rate pulse transmission line is aqueous medium transmission line and Vacuum Magnetic dielectric transmission line.
The Plate-Transmission-Line of aqueous medium three has important application in pulse power device.Relative to coaxial transmission line and double flat
Board transmission line, three board transmission lines can obtain lower characteristic impedance, and its space efficiency utilization is higher, thus can improve energy biography
Defeated density.Sandia National Laboratories of U.S. ZR devices (26MA) and domestic China Engineering Physics Research Institute PTS devices (8~
Three flat board aqueous medium transmission lines 10MA) are used, the output pulse of prime pulse power system is transmitted to vacuum insulation heap.
In the proposed Z constrictions fusion energy resource driver Z-800 of future generation made of Sandia, also plan is real using the board transmission line of overall radial three
The transmission and convergence of existing 90 road LTD systems output pulse.
Fig. 1 is existing three Plate-Transmission-Lines schematic diagram.Existing three board transmission lines operating voltage (number more than MV) and impedance
Higher (the printed line impedance of ZR and PTS devices three is respectively 4.32 Ω and 4 Ω).In the experiment of material kinetics isentropic Compression, to driving
The requirement of dynamic device load voltage is reduced to hundreds of kilovolts, and electric current is still tens of megamperes, the lower transmission line of this characteristics of needs impedance
To realize the transmission of pulse and convergence.Therefore, it is necessary to be optimized to the structure of three printed lines, three plates that impedance is less than 1 Ω are sought
Transmission line structure.
The content of the invention
In order to further reduce the characteristic impedance of current three board transmission line, the present invention proposes a kind of I-shaped aqueous medium Gao Gong
The board transmission line of rate three,
Compared to traditional three board transmission lines (three Plate-Transmission-Lines and overall radial transmission line), I-shaped proposed by the present invention
The printed line of type three can further reduce transmission line characteristic impedance, the convergence and transmission of multiplex pulse electric current can be achieved, in the next generation
There is potential using value in the tens of MA of electric current Z constrictions and isentropic Compression driver.
The present invention technical solution be：
The board transmission line of radial direction three of Transmission Convergence pulse current provided by the present invention, it is characterized in that：Including interior
Electrode, external electrode and multiple cable connector holes.
Definition three board transmission lines of radial direction are cross section, the external electrode and interior electrode perpendicular to the section of power transmission direction
Cross section be I-shaped, and external electrode offers the I-shaped cavity to match with interior electrode shape and size, it is described in
Electrode is nested in external electrode and has gap between external electrode；Inside and outside electrode gap filling deionized water is situated between as insulation
Matter.
The both sides of the external electrode are the groove that is formed by I-shaped structure；The multiple cable connector hole is arranged on outer
The groove of electrode both sides.
The cross sectional dimensions of above-mentioned interior electrode and external electrode is gradually reduced along power transmission direction, realizes large scale pulse work(
Power transmission and convergence of the rate system to central load region (small size), obtain power compression on space scale.
Above-mentioned multiple cable connector holes are symmetricly set on the groove of external electrode both sides, realize that I-shaped transmission-line power is close
Being uniformly distributed for degree, improves the output pulse parameter of transmission line.
Compared with prior art, advantage is the present invention：
1st, Low ESR：The cross section of three board transmission lines of the invention is in " work " font, is essentially three three conventional flat boards
The parallel connection of transmission line, therefore its characteristic impedance reduces by 1/3.
2nd, the groove in I-shaped three board transmission lines both sides is provided with dozens of cable connector hole, can pass through high-tension electricity
Cable connects multiple prime discharge cells, realizes the superposition and convergence of multiple prime discharge cell output pulse currents.
3rd, flexible adjustment：Can being actually needed according to load, spirit is carried out to the output current wave of I-shaped transmission line
Regulation living.Change the number of I-shaped transmission line feed-in high-tension cable, to adjust output current amplitude；Adjust the pulse of each cable
The feed-in time, the output current rise time can be adjusted.
4th, it is easy to use：Multiple I-shaped transmission lines are used in parallel, even circumferential arrangement, can further improve the defeated of load
Go out current amplitude；Multiple I-shaped transmission lines are used in series, and can improve load voltage.
5th, size is small, compact-sized：The present invention proposes a kind of I-shaped three board transmission line, and its operating voltage 200~
400kV, characteristic impedance is less than 1 Ω, compact-sized compact, in the tens of MA of electric current of future generation Z constrictions and isentropic Compression pulse work(
There is potential using value in rate driver.
Brief description of the drawings
Fig. 1 is existing three board transmission lines cross-sectional view；
The I-shaped three board transmission lines top views of Fig. 2；
The I-shaped three board transmission lines cross section views of Fig. 3；
The I-shaped three board transmission lines structures of Fig. 4；
Fig. 5 primes discharge cell and high-pressure coaxial cable equivalent circuit；
Fig. 6 prime single spur tracks discharge current waveform (end matched load)；
Fig. 7 is two I-shaped transmission lines series connection output characteristics (the Ω ohmic loads of@0.4), and wherein a is load voltage and electricity
Waveform is flowed, b is bearing power waveform.
Wherein reference is：Electrode in 21-；22- external electrodes, 23- cable connectors hole.
Embodiment
The present invention core concept be：The cross section of (1) three board transmission line is in " work " font, is essentially three normal at present
With the parallel connection of three board transmission lines, therefore its characteristic impedance reduces by 1/3.(2) in the groove of the both sides of I-shaped three board transmission line
Dozens of cable connector hole is symmetrical arranged, can realize that multiplex pulse electric current converges by cable connection prime discharge cell.(3)
Along electric pulse transmission direction, transmission line cross sectional dimensions is gradually reduced, and realizes large scale primary pulse power system to small size
The pulse transmission and convergence of load, the i.e. compression of energy and power space yardstick.(4) multiple I-shaped three board transmission lines series connection make
With output voltage can be improved.(5) multiple I-shaped transmission lines are used in parallel, can improve output current.
I-shaped transmission line is as in Figure 2-4 in the present embodiment.Transmission line internal and external electrode spacing d=2cm, interior plate electrode
Area is 1.21 × 105cm2.Along pulse transmission direction, transmission line sectional dimension is gradually reduced.Interior electrode width is from first section by wi
=574mm is gradually reduced to exit wo=84mm.Three Plate-Transmission-Line impedance computation formula
In formula, εrThe relative dielectric constant of-transmission line medium；D- positive and negative electrode spacing；W- electrode widths.
The Ω of three flat board line input impedance 0.71 is calculated by formula (1), outlet impedance increases to 4.03 Ω.It is I-shaped in the present invention
Three board transmission lines are actually the parallel connection of three three Plate-Transmission-Lines, and its characteristic impedance is about the 1/3 of upper formula result of calculation, i.e.,
1.343 Ω are increased to by 0.237 Ω.
18 cable jointing holes are respectively set in the groove at left and right sides of I-shaped transmission line, before being connected by high-tension cable
The fast discharge cell of level.The fast discharge cell of prime uses 2 grades of positive and negative charging Marx circuits, using 4 capacity 80nF, nominal voltages
100kV plastic housing capacitor and 2 low inductance gas switch series connection, discharge cell equivalent inductance 480nH, establish electric capacity
20nF, the Ω of equivalent series resistance 0.6, the nominal energy storage 1.6kJ of single spur track.Optimization output impedance (the matching resistance of prime discharge cell
It is anti-) Zoptimum
Using aqueous medium coaxial high pressure cable, (characteristic impedance is equal to Zoptimum, electric pulse length 600ns) prime is discharged
I-shaped three board transmission line of output pulse feed-in of unit.Primary discharge cell with coaxial aqueous medium high-tension cable equivalent circuit such as
Shown in Fig. 5.When coaxial aqueous medium feed cable terminating impedance matches, single discharge paths output pulse is as shown in Figure 6.
The pulse voltage amplitude about 220kV, effective acting time τ of the I-shaped transmission line of feed-ineff(crest voltage 63%) about
0.215 μ s, according to aqueous medium disruptive field intensity estimation equation
By above formula estimation aqueous medium disruptive field intensity Ep=179kV/cm, embodiment intermediate gap d=2cm, gap average electric field
110kV/cm, insulation safety coefficient about 61%, therefore the design of I-shaped transmission line is reasonable in embodiment.
Each I-shaped transmission line accesses the high-voltage pulse shown in 36 road Fig. 6 by aqueous medium high-tension cable.Two I-shapeds
Type transmission line is arranged up and down, is used in series.Wherein, the I-shaped road positive pulse of three printed lines feed-in 36 above, below I-shaped
The road negative pulse of three printed line feed-in of type 36.End connects 0.4 Ω ohmic loads and (is slightly larger than the 36 × 2=of ÷ of matched load 5.9
0.33Ω).Simulated through 3 D electromagnetic, load voltage, electric current and power are as shown in fig. 7, rise time of load current 100ns, width
It is worth nearly 700kA, load voltage 300kV, power 200GW.
Claims (2)
- A kind of 1. board transmission line of radial direction three of Transmission Convergence pulse current, it is characterised in that：Including interior electrode, external electrode and multiple Cable connector hole,Radially three board transmission lines perpendicular to the section of power transmission direction be cross section for definition, the horizontal stroke of the external electrode and interior electrode Section is I-shaped, and external electrode offers the I-shaped cavity to match with interior electrode shape and size, the interior electrode It is nested in along transmission direction in external electrode and there is gap between external electrode, deionized water conduct is filled in the gap of inside and outside electrode Dielectric；The both sides of the external electrode are the groove that is formed by I-shaped structure；The multiple cable connector hole is arranged on external electrode The groove of both sides；The cross section of the interior electrode and external electrode is gradually reduced along transmission direction.
- 2. the board transmission line of radial direction three of Transmission Convergence pulse current according to claim 1, it is characterised in that：It is the multiple Cable connector hole is symmetricly set on the groove of external electrode both sides.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610460404.8A CN106158077B (en) | 2016-06-22 | 2016-06-22 | A kind of radial direction three board transmission line of Transmission Convergence pulse current |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610460404.8A CN106158077B (en) | 2016-06-22 | 2016-06-22 | A kind of radial direction three board transmission line of Transmission Convergence pulse current |
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| CN106158077B true CN106158077B (en) | 2018-01-19 |
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| CN204720531U (en) * | 2015-07-10 | 2015-10-21 | 中国工程物理研究院流体物理研究所 | Circular arc curve high-voltage pulse transmission line and folded form high-voltage pulse transmission line |
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