CN103269214A - Blumlein-type pulse forming system with thin-film capacitors triggered by square waves - Google Patents
Blumlein-type pulse forming system with thin-film capacitors triggered by square waves Download PDFInfo
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- CN103269214A CN103269214A CN2013102404448A CN201310240444A CN103269214A CN 103269214 A CN103269214 A CN 103269214A CN 2013102404448 A CN2013102404448 A CN 2013102404448A CN 201310240444 A CN201310240444 A CN 201310240444A CN 103269214 A CN103269214 A CN 103269214A
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Abstract
The invention discloses a Blumlein-type pulse forming system with thin-film capacitors triggered by square waves. The pulse forming system comprises a Blumlein-type pulse forming network, a square wave trigger, a main switch and a load, wherein the main switch is used for connecting the Blumlein-type pulse forming network with the square wave trigger; the load is connected to the output terminal of the Blumlein-type pulse forming network; the thin-film capacitor with the capacitance value of 0.8 to 2nF is adopted in each stage in the Blumlein-type pulse forming network; the output terminal of each thin-film capacitor is output fixedly by connecting a wide electrode with three screws; and the square wave trigger comprises an energy-stored pulse forming line, a voltage equalizing circuit and a low shaking switch. By utilizing the thin-film capacitors with the low capacitance values, the pulse forming system has the advantages of being good in impact resistance, excellent in electrical performance, wide in working temperature range, very small in influence on self-performance caused by the environment, long in service life and the like.
Description
Technical field
The present invention relates to the pulse shaping field, particularly relate to the thin-film capacitor Blumlein type pulse shaping system that a kind of square wave triggers, adopt the low appearance value thin-film capacitor that improves design to replace ceramic condenser.
Background technology
Along with the continuous development of Pulse Power Techniques, miniaturization, long-life and modularization are the inexorable trends of high power pulse power source development.Yet, as the high-power pulse source of high-power microwave source critical component, all there is the bigger problem of volume at present, wherein pulse shaping system bulk is excessive to be problem demanding prompt solution wherein; Have only the miniaturization that has realized the pulse shaping system, could truly realize the miniaturization of high-power pulse source.The miniaturization design of pulse shaping system usually, comprises the miniaturization of pulse forming line and triggering system.Pulse forming line used in the high power pulse power source mostly is metal structure, and size is bigger, has produced many thoughts with the pulse forming line miniaturization thus; As: select for use the media ceramic of high-k as energy storage material, can dwindle the volume of pulse shaping device greatly; But the sintering of bulk pottery, preparation difficulty are big, and technology is immature, and the life-span is short, and then has seriously restricted its application in the miniaturization pulse power supply.Laser triggers has the advantage of low jitter, steady operation, but systems bulky has strict demand to operational environment, is difficult to reach miniaturization, practicability design object.Therefore, seeking a kind of compact, modularization of shaking the pulse shaping system paired pulses power technology low, that volume is little, the life-span is long develops significant.
Thin-film capacitor has advantages such as good impact resistance, excellent electrical properties, wide, the performance of operating temperature range own little, long working life affected by environment, it can satisfy long-term, the reliable and stable service requirement of system, but the appearance of existing thin-film capacitor value is excessive, and the square-wave pulse that form pulsewidth 100-200ns is very difficult.
Summary of the invention
The objective of the invention is for the life problems under long-time, the repetition condition of work that overcomes ceramic condenser in the existing Blumlein type pulse shaping system, simultaneously because the appearance of existing thin-film capacitor value is excessive, the square-wave pulse that forms pulsewidth 100-200ns is very difficult, a kind of improved thin-film capacitor is proposed now, the appearance value is 0.8-2nF, adopt the red copper electrode connecting piece to replace traditional spirality inductance simultaneously, reduce a grade inductance, realize that at last Blumlein type pulse shaping system output pulse width is 100-200ns.
The present invention adopts following technical scheme: the thin-film capacitor Blumlein type pulse shaping system that a kind of square wave triggers, this system comprises Blumlein type pulse forming network, square wave trigger, main switch and load, by main switch Blumlein type pulse forming network and square wave trigger are linked together, load is connected the output of Blumlein type pulse forming network; The electric capacity of employings at different levels is thin-film capacitor in the described Blumlein type pulse forming network, and the appearance value of thin-film capacitor is 0.8-2nF, and the output of described thin-film capacitor adopts wide electrode to connect the fixing output of three screws; Described square wave trigger comprises energy storage pulse forming line, equalizer circuit and low jitter switch, and an end of energy storage pulse forming line is connected with the main switch trigger electrode, and the other end is connected to the anode of low jitter switch; The high-pressure side of equalizer circuit is connected the main switch anode, and all press bond is to the main switch trigger electrode, and low-pressure end is connected with the earth terminal of Blumlein type pulse forming network; The anode of low jitter switch is connected minus earth with the energy storage pulse forming line.
In technique scheme, the electrical length of described energy storage pulse forming line is adjustable.
In technique scheme, the circuit parameter of described equalizer circuit is adjustable.
In technique scheme, increase the quantity of the inside submodule of described thin-film capacitor, reduce the appearance value of electric capacity.
In technique scheme, increase by two distance between electrodes of described submodule, reduce the appearance value of submodule.
Pulse forming network forms the waveform pulsewidth and is comprehensively determined by level electric capacity, level inductance and progression; Herein, be illustrated with even type pulse forming network.As: when adopting n joint uniform network, every assistant warden inductance L
0(being sense sum in red copper electrode connecting piece and the electric capacity) generally at tens～hundred nH, sense is about 20nH in the electric capacity, and red copper electrode connecting piece inductance is by square-section lead inductance computing formula
Determine that l is electrode connecting piece length, b, c are respectively the rectangular electrode brace cross section length of side.Level electric capacity is C
0, size 0.8～2nF.Every grade of network is to pulsewidth
Contribution be about 10～30ns, concrete numerical value is determined by the red copper electrode connecting piece inductance of the capacitor's capacity of selecting and design; Impedance
Be generally several Europe～tens Europe.The pulse duration τ of n joint pulse forming network and impedance Z are respectively by formula
Determine.
The square wave trigger is based on pulse forming line energy storage and technology of pressure equalization, and equalizer circuit is selected for use has the capacitance-resistance of better response all to press to direct current signal and pulse signal.When thin-film capacitor Blumlein type pulse forming network charges to setting voltage V
0, square wave trigger energy storage pulse forming line charging voltage is V
0/ 2.At this moment, low jitter switch conducting over the ground in the square wave trigger, an amplitude is-V
0/ 2,2 τ that pulsewidth is
0(τ
0Being square wave trigger energy storage pulse forming line electrical length) square-wave signal propagates to the main switch trigger electrode.When triggering signal arrived trigger electrode, the main switch electric field distorted strongly, switch conduction.
The invention has the advantages that: by the pulse shaping system among the present invention, adopted the thin-film capacitor of low appearance value, make the pulse shaping system have good impact resistance, excellent electrical properties, wide, the performance of operating temperature range little, long working life affected by environment own, the work of repetition for a long time and do not influence system; Adopted equalizer circuit and low jitter switch in the square wave trigger, made it can stablize trigger impulse and form the networking, realized that the pulse square wave shake of final output is lower, wave-shape amplitude is more steady.
Description of drawings
The present invention will illustrate by embodiment and with reference to the mode of accompanying drawing, wherein:
Fig. 1 is system architecture diagram of the present invention;
Fig. 2 is the concrete connection layout of Blumlein type pulse forming network of the present invention;
Fig. 3 is Blumlein type PFN Discharge curve chart;
Fig. 4 is a timing chart of the present invention;
Wherein: the 1st, thin-film capacitor, the 2nd, red copper brace, the 3rd, thin-film capacitor output, the 4th, energy storage pulse forming line, the 5th, equalizer circuit.
Embodiment
The present invention is described further below in conjunction with accompanying drawing.
As shown in Figure 1, whole pulse shaping system comprises Blumlein type pulse network, square wave trigger, main switch and is connected the load of Blumlein type pulse network output, Blumlein type pulse forming network in this programme adopts the thin-film capacitor 1 after improving, the appearance value of thin-film capacitor 1 is 0.8-2nF, and the impulse waveform pulsewidth of final output is 100-200ns; Adopt the square wave trigger that Blumlein type pulse network is triggered, the square wave trigger comprises energy storage pulse forming line 4, evenly circuit 5 and low jitter switch, this trigger have trigger voltage hold time long, trigger the low advantage of shake.One end of energy storage pulse forming line 4 is connected with the main switch trigger electrode, and the other end is connected to the anode of low jitter switch; The high-pressure side of equalizer circuit 5 connects the main switch anode of Blumlein type pulse forming network, and all press bond is to the main switch trigger electrode, and low-pressure end is connected with the earth terminal of pulse forming network; The anode of low jitter switch is connected minus earth with the energy storage pulse forming line.The electrical length of energy storage pulse forming line 4 is adjustable, and evenly every circuit parameter of circuit 5 also can be transferred according to actual needs, and employing low jitter switch is that low jitter, the steady operation of Blumlein type pulse network lays the foundation.
In this programme, the thin-film capacitor 1 in order to realize 0.8-2nF improves traditional thin-film capacitor, optimizes thin-film capacitor 1 inner submodule, increases the quantity of submodule, and submodule is together in series successively, by C
0=C/n(C
0Be integral capacitor, C is the electric capacity of submodule, and n is the number of submodule) as can be known, the appearance value of integral capacitor and the submodule quantity of series connection are inversely proportional to; Optimize the submodule internal structure simultaneously, increase the phase mutual edge distance between two electrodes, make two interelectrode dielectric thicknesses increase, the appearance value of submodule is just corresponding reduction also.By C
0=C/n can obtain, and C reduces n to be increased, and the appearance value of so whole thin-film capacitor 1 also just must reduce.
As shown in Figure 2, the connection among the present invention between the thin-film capacitor 1 adopts red copper brace 2 to be fixed on the thin-film capacitor output 3, and several electric capacity are linked together, and thin-film capacitor output 3 adopts wide electrode to connect the fixing output of three screws.In order to increase the connection contact-making surface, adopt two screws that red copper brace 2 is fixed on the thin-film capacitor output 3.Red copper brace 2 is separated by far away, and distance is generally at tens～hundred millimeters, and the mutual inductance that utilizes Biot-Savart law can derive between two electrode connecting piece is:
The course of work of native system is to give Blumlein type pulse forming network when power supply and charge to voltage V
0The time, low jitter switch conducting over the ground in the square wave trigger, an amplitude-V
0/ 2, pulsewidth 2 τ
0Square-wave signal propagate to the trigger electrode of main switch.Time-delay τ
0After, electric field distorts strongly in the main switch, and then the development conducting, and Blumlein type pulse forming network passes through it to load discharge.When load and the impedance matching of Blumlein type pulse forming network, can obtain amplitude at matched load is V
0, pulsewidth is the τ high-voltage pulse.The capacitor C of nearly load
1Pass through inductance L
1, L
11(L
1Be electrode connecting piece inductance, L
11For feeling in the electric capacity) to load discharge; Discharge delay time through first order network
After, C
2Through L
1, L
11, L
2, L
22Begin discharge to load, and the like.Obtain every grade of electric capacity by inductance to the curve of load discharge shown in solid line among Fig. 3.The charging voltage of every grade of electric capacity is identical, and because the difference of electric capacity, inductance makes the discharge time constant difference, therefore every grade of electric capacity is also different to the voltage amplitude of load discharge.By every grade of capacitor discharge waveform is superposeed, obtain the pulse shaping waveform of whole pulse forming network, as shown in phantom in Figure 3.
Specific embodiment:
The thin-film capacitor Blumlein type pulse shaping system that the square wave of system output voltage 20kV, a pulsewidth 160ns triggers, Blumlein system features impedance 14 Ω.
Low appearance value, low inductance thin-film capacitor capacity are 1.5nF, the long 60mm of electrode connecting piece, wide 48mm, thick 2mm.Through-hole aperture is 7mm on the red copper electrode connecting piece, and two pitchs of holes that are fixed on the same electric capacity are 30mm, and through hole is apart from electrode connecting piece edge 9mm.
According to calculating, obtaining every grade of electrode connecting piece inductance is 52nH, considers sense 20nH in the electric capacity; Calculate pulse forming network impedance z～7 Ω, every grade of pulse forming network is 20ns to the contribution of pulsewidth, and the pulse forming network progression that the 160ns pulsewidth needs is 8.
Square wave trigger energy storage pulse forming line electrical length is 50ns, and namely trigger pulse width is 100ns.Equalizer circuit is for to have the capacitance-resistance of better response all to press to direct current signal and pulse signal; Grading resistor not only will play all pressure effects, and can not allow elementary energy storage comparatively fast miss by it, elects 10M Ω herein as; Also to the equalizing capacitance charging, for guaranteeing equalizing capacitance the efficiency of transmission of energy is not had big influence when elementary charge power supply is discharged by grading resistor, equalizing capacitance needs much smaller than Blumlein type pulse forming network electric capacity 24nF, is chosen to be 525pF herein.The low jitter switch is that glow discharge triggers counterfeit spark switch.
Thin-film capacitor Blumlein type pulse forming network charging 20kV is under the square wave trigger triggers; 8 grades of Blumlein type pulse forming network exportable voltage 20kV on matched load 14 Ω, the pulse of pulsewidth 160ns.The thin-film capacitor Blumlein type pulse shaping system module that designed quasi-square wave triggers is of a size of: 600mm * 100mm * 320mm, the about 0.019m of volume
3
The pulse shaping characteristic of the thin-film capacitor Blumlein type pulse shaping system that the square wave of inventing for checking triggers has been carried out simulation analysis to it.The result shows that it can form pulse square wave preferably, the about 160ns of pulse duration, as shown in Figure 4.
Disclosed all features in this specification except mutually exclusive feature, all can make up by any way.
The above only is preferred embodiment of the present invention, not in order to limiting the present invention, all any modifications of doing within the spirit and principles in the present invention, is equal to and replaces and improvement etc., all should be included within protection scope of the present invention.
Claims (5)
1. the thin-film capacitor Blumlein type pulse shaping system that triggers of a square wave, it is characterized by this system and comprise Blumlein type pulse forming network, square wave trigger, main switch and load, by main switch Blumlein type pulse forming network and square wave trigger are linked together, load is connected the output of Blumlein type pulse forming network; The electric capacity of employings at different levels is thin-film capacitor in the described Blumlein type pulse forming network, and the appearance value of thin-film capacitor is 0.8-2nF, and the output of described thin-film capacitor adopts wide electrode to connect the fixing output of three screws; Described square wave trigger comprises energy storage pulse forming line, equalizer circuit and low jitter switch, and an end of energy storage pulse forming line is connected with the main switch trigger electrode, and the other end is connected to the anode of low jitter switch; The high-pressure side of equalizer circuit is connected the main switch anode, and all press bond is to the main switch trigger electrode, and low-pressure end is connected with the earth terminal of Blumlein type pulse forming network; The anode of low jitter switch is connected minus earth with the energy storage pulse forming line.
2. the thin-film capacitor Blumlein type pulse shaping system that triggers of a kind of square wave according to claim 1, the electrical length that it is characterized by described energy storage pulse forming line is adjustable.
3. the thin-film capacitor Blumlein type pulse shaping system that triggers of a kind of square wave according to claim 1, the circuit parameter that it is characterized by described equalizer circuit is adjustable.
4. the thin-film capacitor Blumlein type pulse shaping system that triggers of a kind of square wave according to claim 1 is characterized by the quantity of the inside submodule that increases described thin-film capacitor, reduces the appearance value of electric capacity.
5. the thin-film capacitor Blumlein type pulse shaping system of a kind of square wave triggering according to claim 4 is characterized by two distance between electrodes of the described submodule of increase, reduces the appearance value of submodule.
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|---|---|---|---|
| CN201310240444.8A CN103269214B (en) | 2013-06-18 | 2013-06-18 | Blumlein-type pulse forming system with thin-film capacitors triggered by square waves |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108900178A (en) * | 2018-06-13 | 2018-11-27 | 中国工程物理研究院应用电子学研究所 | A kind of compound long pulse formation network |
| CN114414956A (en) * | 2021-12-27 | 2022-04-29 | 中国工程物理研究院应用电子学研究所 | Gas spark switch discharge experiment circuit and device |
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| CN102664607A (en) * | 2012-05-14 | 2012-09-12 | 中国工程物理研究院应用电子学研究所 | Novel high-pressure square-wave pulse generating system |
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2013
- 2013-06-18 CN CN201310240444.8A patent/CN103269214B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102664607A (en) * | 2012-05-14 | 2012-09-12 | 中国工程物理研究院应用电子学研究所 | Novel high-pressure square-wave pulse generating system |
Non-Patent Citations (2)
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| 王庆峰等: "脉冲形成网络的设计与实验研究", 《强激光与粒子束》, vol. 21, no. 4, 30 April 2009 (2009-04-30), pages 531 - 535 * |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108900178A (en) * | 2018-06-13 | 2018-11-27 | 中国工程物理研究院应用电子学研究所 | A kind of compound long pulse formation network |
| CN108900178B (en) * | 2018-06-13 | 2022-05-31 | 中国工程物理研究院应用电子学研究所 | Composite long pulse forming network |
| CN114414956A (en) * | 2021-12-27 | 2022-04-29 | 中国工程物理研究院应用电子学研究所 | Gas spark switch discharge experiment circuit and device |
| CN114414956B (en) * | 2021-12-27 | 2023-06-16 | 中国工程物理研究院应用电子学研究所 | Gas spark switch discharge experiment circuit and device |
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| CN103269214B (en) | 2015-06-10 |
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