CN1184741C - Fast leading edge and high voltage square wave pulse generator - Google Patents
Fast leading edge and high voltage square wave pulse generator Download PDFInfo
- Publication number
- CN1184741C CN1184741C CNB001138146A CN00113814A CN1184741C CN 1184741 C CN1184741 C CN 1184741C CN B001138146 A CNB001138146 A CN B001138146A CN 00113814 A CN00113814 A CN 00113814A CN 1184741 C CN1184741 C CN 1184741C
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- switch
- transmission line
- pulse
- film
- pulse generator
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Abstract
The present invention relates to a square wave electrical pulse source. The existing square wave source is difficult to simultaneously satisfy requirements of fast front edge and high voltage. A pulse source of a distortion switch of an electrician insulation film field which is designed to artificially overcome the difficulty has high voltage. Though the voltage of the pulse source is high, the pulse source can be only matched with transmission lines with low impedance, the front edge of the pulse is slow, and the waveform is irregular. The present invention adopts a film medium switch with a single discharge gap, the film medium switch with a single discharge gas is connected with a standard coaxial cable, and electromagnetism drives machinery to trigger. The present invention is provided with an elastic and telescopic film clamping mechanism, the front edge of the pulse of a sample machine is smaller than 2 ns, the amplitude value achieves 12kV, the waveform is regular, and the present invention is suitable for the technical fields of high voltage and pulse.
Description
The present invention relates to a kind of square wave electric pulse generator.
Square-wave pulse generator has been widely used in high voltage technique and High pulse power technology, is that the output pulse front edge is fast to its basic demand, amplitude height, waveform rule.
The principle of square-wave pulse generator is, utilizes quick-make switch and suitably be connected with switch, carries out in advance the transmission line or the boostrap of DC charging, and electromagnetism setback, reflection process by the switch quick-make causes in transmission line form square-wave pulse.The performance of the forward position of square-wave pulse, amplitude and waveform and Closing Switch is closely related.
Usually mercury profit switch, discharge tube, the semiconductor switch of employing are difficult to satisfy simultaneously the requirement of output pulse front edge fast (about 1ns), voltage magnitude height (more than the 10kV) to square-wave pulse generator at present.
Closely related with the problems referred to above and the present invention, Martin J.C., nineteen sixty-eight (Fivth Symposium on FusionTechnology, Oxford), Dokopoulos P., (IEEE Transactions on NuclearScience in 1971, vol.18, no.4, pp.303-307), Nunnally W.C., (New York:PlenumPublishing Corporation in 1976, pp.429-432), Salge, J.G.H., (Eighth IEEEInternational Pulsed Power Conference in 1991, USA, pp.183-186), disclose or improved a kind of pulse generator respectively based on electric insulation film discharge switch (being designated hereinafter simply as " thin film switch "), utilize electric insulation film (being designated hereinafter simply as " film ") electric strength height, the characteristic that discharging gap is short, figure for fast forward position, the pulse of high amplitude, wherein switch is the field distortion type switch that plural layers and a plurality of foil electrode overlap and constitute, transmission line is three parallel-plate electrode Low ESR microstrip lines.The common deficiency of these pulse generators is, owing to be subjected to the geometrical property restriction of films for electrical purposes, the switch of design is only at Low ESR (0.1 Ω magnitude) microstrip transmission line, therefore its range of application is subjected to great limitation, simultaneously, owing to have stray inductance inevitably in the discharge loop, the time constant (inductance ÷ impedance summation) that constitutes with Low ESR transmission line and load is big, pulse front edge is unhappy, because of switch is the field distortion type switch that plural layers and a plurality of foil electrode overlap and constitute, be subjected to the influence of discharge breakdown successively of trigger impulse and film again, waveform is irregular, in addition, the construction of switch complexity, high to the forward position and the amplitude requirement of trigger impulse, switch performance is influenced greatly by film thickness, it is unreliable to work, and has also reduced the practical value of thin film switch pulse generator to a great extent.
The objective of the invention is to obtain a kind of well behaved thin film switch square-wave pulse generator that can overcome above-mentioned technical difficulty.
Technical solution of the present invention is, adopt single discharging gap thin film dielectrics switch, to improve the reliability of switch, improve impulse waveform, the switch electrode of insulation film one side takes sleeve-like to become the diameter coaxial configuration, link to each other with the industrial standard coaxial cable of single or many parallel connections, transmission line and construction of switch are corresponding, adopt the industrial standard coaxial cable of single or many parallel connections, be arranged as the pairs of transmission line pattern, obtain the higher coupling output impedance of plurality of specifications (50 Ω for example, 75 Ω, 100 Ω, 150 Ω etc.), the chopped pulse rise time, the switch electrode of insulation film opposite side is a bowl cover shape, the thin bar of needle-like metal is installed in it, and it utilizes solenoid actuated bump film to trigger, and the installation of film and replacing utilize the elastic telescopic sandwiched film mechanism to realize.
The advantage of the technology of the present invention solution is, significantly the chopped pulse rise time, improves impulse waveform, high output pulse amplitude arranged again, and reduced the required precision to film thickness, and is simple in structure, reliability height, highly versatile, simple operation.
Accompanying drawing 1 is the electrical schematic diagram of the embodiment of the invention, and accompanying drawing 2 is structural representations of this embodiment thin film switch.Below in conjunction with accompanying drawing inner characteristic of the present invention and embodiment are further described.
In the accompanying drawing; 1 and 2 is two branch lines of pairs of transmission line; each branch line is made of the industrial standard coaxial cable of single or many parallel connections; its wave impedance equals the used unit cable wave impedance of this branch line ÷ n; n is the radical of this branch line shunt cable; 3 is thin film switch; 4 are the pulse output cable; its wave impedance equals 1 and 2 wave impedance sum when coupling output; 5 for to play current-limiting protection effect and the resistance relevant with pulse shaping to high-voltage DC power supply (not drawing in the accompanying drawing); 6 is the output of high-voltage DC power supply; 7 is the resistance that plays the effect of charging and ground connection to 2; it is worth the wave impedance much larger than 4; 8 is the external electrode (ground connection) of thin film switch coax segments; 9 is the interior electrode of thin film switch coax segments; 10 is the dielectric between 8 and 9; 11 is an end of 2 close 3, and 12 is structure member, and 13 is the thin bar of needle-like metal that is used to trigger; 14 is 13 drive magnet; 15 is support unit, and 16 is spring, and 17 is the bowl cover shape electrode (ground connection) of thin film switch; it has an intervisibility hole along axis; 13 are moving in this intervisibility hole under 14 the effect, and 18 is the electric insulation film, and its thickness is can tolerate the high voltage degree of being that needs.6 add high pressure after, 1 and 2 are recharged by 5 and 7, when 14 powered up, 13 were actuated to its most advanced and sophisticated bump film 18,18 because of the bump failure of insulation, puncture rapidly under high-tension effect.18 installation and replacing utilize the 15 and 16 elastic telescopic sandwiched film mechanisms of forming to realize.
Test result by the principle prototype of the present invention design is proved that adopt technical scheme of the present invention, the forward position of output square-wave pulse is low to reach 1 to 2ns, and voltage magnitude is up to 12kV, waveform rule, and reliability height, simple operation.
Claims (3)
1. square wave electric pulse generator, form as the switch and the transmission line of discharge medium by adopting the electric insulation film, it is characterized in that, said switch has unique discharging gap, insulation film (18) is installed in the gap, insulation film (18) is two parts with the electrode separation of said switch, wherein a part is formed sleeve-like change diameter coaxial configuration by external electrode (8) and interior electrode (9), link to each other with the industrial standard coaxial cable (11) of single or many parallel connections, another part is a bowl cover shape electrode (17), the thin bar of needle-like metal (13) is installed in the bowl cover shape electrode (17), the thin bar of needle-like metal (13) is driven by electromagnet (14), and bump film (18) triggers.
2. by the described square-wave pulse generator of claim 1, it is characterized in that, said transmission line consists of the pairs of transmission line pattern by mains side transmission line (1) and switch-side transmission line (2), and mains side transmission line (1) and switch-side transmission line (2) are made of the industrial standard coaxial cable of single or many parallel connections respectively.
3. by the described square-wave pulse generator of claim 1, it is characterized in that support unit (15), spring (16) and bowl cover shape electrode (17) are formed an elastic telescopic mechanism, and film (18) is pressed between interior electrode (9) and the bowl cover shape electrode (17).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB001138146A CN1184741C (en) | 2000-05-09 | 2000-05-09 | Fast leading edge and high voltage square wave pulse generator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB001138146A CN1184741C (en) | 2000-05-09 | 2000-05-09 | Fast leading edge and high voltage square wave pulse generator |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1323100A CN1323100A (en) | 2001-11-21 |
| CN1184741C true CN1184741C (en) | 2005-01-12 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB001138146A Expired - Fee Related CN1184741C (en) | 2000-05-09 | 2000-05-09 | Fast leading edge and high voltage square wave pulse generator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1184741C (en) |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102136831B (en) * | 2011-01-14 | 2013-04-24 | 西北核技术研究所 | High-voltage repetition-frequency pulse generator |
| CN102739201B (en) * | 2012-06-29 | 2014-12-31 | 西北核技术研究所 | Semiconductor opening switch (SOS)-based ultra-wide spectrum pulse generator with 100 kHz pulse frequency |
| CN104639117B (en) * | 2014-12-12 | 2017-06-20 | 西北核技术研究所 | A kind of air insulation switch and fast rise time high-voltage square-wave generator |
| CN105891563A (en) * | 2014-12-16 | 2016-08-24 | 中国人民解放军63973部队 | High-altitude nuclear explosion electromagnetic pulse standard signal analog device |
| CN104868882B (en) * | 2015-05-15 | 2017-07-28 | 西北核技术研究所 | A kind of electric pulse generator for producing fast leading edge and high voltage pulse square wave |
| CN108414894B (en) * | 2018-03-12 | 2020-04-24 | 武汉三相电力科技有限公司 | Travelling wave generating device and controllable travelling wave generating device |
| CN109378240B (en) * | 2018-09-29 | 2020-08-14 | 西北核技术研究所 | Laser ablation triggering thin film switch and square wave generator |
| CN110275125B (en) * | 2019-06-18 | 2022-11-25 | 中国电力科学研究院有限公司 | System and method for calibrating dynamic characteristics of impulse current measuring device |
| CN110660569B (en) * | 2019-08-29 | 2021-06-04 | 合肥博雷电气有限公司 | Pulse forming inductor with coaxial structure and processing method thereof |
-
2000
- 2000-05-09 CN CNB001138146A patent/CN1184741C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN1323100A (en) | 2001-11-21 |
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