CN104967429B - A kind of nanosecond high pressure steep-sided pulse generator - Google Patents
A kind of nanosecond high pressure steep-sided pulse generator Download PDFInfo
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- CN104967429B CN104967429B CN201510142185.4A CN201510142185A CN104967429B CN 104967429 B CN104967429 B CN 104967429B CN 201510142185 A CN201510142185 A CN 201510142185A CN 104967429 B CN104967429 B CN 104967429B
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Abstract
The invention discloses a kind of nanosecond high pressure steep-sided pulse generators for belonging to high-voltage pulse generation technique field.The nanosecond high pressure steep-sided pulse generator mainly includes that power pack, form wire, air gap switch and build-out resistor are composed in series；Air gap switch be separately connected capacitive divider with and build-out resistor, and be mounted in test cavity body.The present invention provides the devices that can generate nanosecond high pressure steepness pulse, and the rising edge of a pulse of output is within 10ns, and for pulsewidth in 100ns or so, pulse amplitude is flexibly controllable, and package unit compressive resistance is 100kV；The surface electrification situation of vacuum insulator under research nanosecond pulse is had a very important significance.
Description
Technical field
The invention belongs to high-voltage pulse generation technique field, in particular to a kind of nanosecond high pressure steep-sided pulse generator.
Background technique
In recent years, as high voltage pulse power technology and electromagnetic pulse technology rapidly develop, the range of application is also got over
Come more extensive, many large size advanced equipments of high grade and precision, such as burst pulse high-power microwave source, high current example beam acceleration device, in order to reduce
The volume and weight of equipment, while guaranteed efficiency, the requirement to Pulse Power Techniques is higher and higher, does not require nothing more than high voltage, big
Electric current, and pulsewidth requirement is more and more narrow.In terms of medicine, the extensive attention that nanosecond pulse voltage has obtained, for cutting off
Sufferer tumour etc., it is closely bound up with the life and health of the mankind.These nanosecond pulses application advanced equipments of high grade and precision in, nanosecond arteries and veins
The insulation characterisitic that punching acts on insulator in lower vacuum gap is to restrict the key factor of equipment performance.
The study found that the gap unlike situation in air or other gas medium environment, in vacuum environment
After insulator is added, the dielectric strength for the insulation system being made of insulator and vacuum is much smaller than the pure empty gap of same size
Or the dielectric strength of solid insulator itself.And the destruction that the dielectric strength of vacuum insulation systems after insulator is added is due to true
Caused by the edge flashing phenomenon that aerial insulator surface occurs.Studies have shown that insulating during applying pulse voltage
Sublist face can generate charge buildup, cause electrification phenomenon, and the appearance of surface charge provides the charge that electric discharge further develops,
Also because the effect of charge itself changes field distribution of the insulator surface in pressure process.So insulator surface is adding
The Accumulating charge generated when pressure is an important factor for causing edge flashing.And both at home and abroad for vacuum insulation sublist under nanosecond pulse
Surface charge characteristic research is less, therefore, charges situation to study the surface of vacuum insulator under nanosecond pulse, needs to have developed
A kind of nanosecond high pressure steep-sided pulse generator.
Summary of the invention
The object of the present invention is to provide a kind of nanosecond high pressure steep-sided pulse generators, which is characterized in that the nanosecond is high
Pressure steep-sided pulse generator includes that power pack, form wire, air gap switch and test cavity are composed in series；Air gap switch is separately connected
Capacitive divider with build-out resistor, air gap switch be mounted on test cavity at the top of.
The power pack is composed in series by pressurized control platform, Industrial Frequency Transformer and Marx generator, then with form wire
Connection；Main function is to generate front pulse, is charged to form wire, and realize the control in triggering times and triggered time.
The form wire uses YJV22-26/35kV power cable, and main function is the pulsewidth for controlling pulse, according to arteries and veins
Wide length computation obtains the length of form wire cable, and the length by changing cable accomplishes the flexible modulation of pulsewidth.
The air gap switch is by two with a thickness of 10mm, and the cylindrical, copper electrode that radius is 15mm forms, two copper electrodes
Between the upper and lower away from for 10mm, effect is within the rising edge to 10ns of steepness pulse；Air gap switch electrode is incorporated into closed transparent
In cavity, 360 degree of observations without dead angle are carried out by transparent cavity；The high-purity N no more than 0.4MPa is filled in cavity2, pass through tune
Whole electrode spacing and air pressure control pulse amplitude；A build-out resistor mounting hole, a capacitive divider is arranged in transparent cavity
Mounting hole.
The build-out resistor main function is that the wave impedance of matching form wire is 50 Ω, guarantees the voltage waveform concussion of output
Small, and consider the fuel factor and compressive resistance of build-out resistor, 50 Ω copper-bath resistance of final choice, compressive resistance is
Surge voltage 100kV.
The capacitive divider main function is the pulse voltage measured after steepness, in input resistance R1 and output resistance R2
Concatenated common point capacitor C constitutes capacitive divider；Wherein, the high-voltage arm of air gap switch is electrode and capacitor point under air gap switch
The distributed couplings capacitor of depressor copper sheet forms；The capacitor C of the low-voltage arm of air gap switch is the patch capacitor in PCB circuit board
Group is formed in parallel by the chip capacitor of 12 150pF, by simulation calculation and test measurement, intrinsic standoff ratio 3600:1,
Frequency band is 85MHz.
The beneficial effects of the invention are as follows provide the device that can generate nanosecond high pressure steepness pulse, the pulse of output
Rising edge is within 10ns, and for pulsewidth in 100ns or so, pulse amplitude is flexibly controllable, and package unit compressive resistance is 100kV.
Detailed description of the invention
Fig. 1 is nanosecond high pressure steep-sided pulse generator schematic diagram.
Fig. 2 is air gap switch schematic diagram.
Fig. 3 is capacitive divider low-voltage arm capacitance structure schematic diagram.
Specific embodiment
The present invention provides a kind of nanosecond high pressure steep-sided pulse generator, is explained with reference to the accompanying drawing.
Fig. 1 show nanosecond high pressure steep-sided pulse generator schematic diagram.Nanosecond high pressure steep-sided pulse generator includes in figure
Power pack, form wire, air gap switch and test cavity are composed in series；Air gap switch be separately connected capacitive divider with and match
Resistance, air gap switch are mounted at the top of test cavity.
The power pack (is occurred by pressurized control platform, Industrial Frequency Transformer and Marx generator by 1100kV surge voltage
Device repacking) it is composed in series, then it is connect with form wire；Main function is to generate front pulse, is charged to form wire, and realize touching
Send out the control of number and triggered time.
The form wire uses YJV22-26/35kV power cable, and main function is the pulsewidth for controlling pulse, according to arteries and veins
The length that form wire cable is calculated in wide length 100ns is 7.77m, and the length by changing cable accomplishes the flexible tune of pulsewidth
Section.
Fig. 2 show air gap switch schematic diagram.For air gap switch by two with a thickness of 10mm, radius is the cylinder of 15mm in figure
Shape copper electrode composition, for two copper electrodes between the upper and lower away from for 10mm, effect is within the rising edge to 10ns of steepness pulse；Air gap is opened
Powered-down pole is incorporated into closed transparent cavity, carries out 360 degree of observations without dead angle by transparent cavity；It fills and is no more than in cavity
The high-purity N of 0.4MPa2, pulse amplitude is controlled by adjusting electrode spacing and air pressure；A build-out resistor is arranged in transparent cavity
Mounting hole, a capacitive divider mounting hole.It is 50 Ω that wherein build-out resistor main function, which is the wave impedance of matching form wire, is protected
The voltage waveform concussion of card output is small, and considers the fuel factor and compressive resistance of build-out resistor, 50 Ω copper sulphate of final choice
Solution resistance, compressive resistance are surge voltage 100kV.
Fig. 3 show capacitive divider structural schematic diagram, in the concatenated common point electricity of input resistance R1 and output resistance R2
Hold C and constitutes capacitive divider；Wherein, the high-voltage arm of air gap switch is the distribution of electrode and capacitive divider copper sheet under air gap switch
Formula coupled capacitor composition；The capacitor C of the low-voltage arm of air gap switch is the patch capacitor group in PCB circuit board, i.e., by 12 150pF
Chip capacitor be formed in parallel, pass through simulation calculation and test measurement, intrinsic standoff ratio 3600:1, frequency band 85MHz.The electricity
Holding divider main function is the pulse voltage measured after steepness,
Specific measuring process is as follows:
1, before pressurizeing, check whether wiring accurate, cable and whether good, build-out resistor the resistance value of air gap switch connection with
And connection, the Grounding of each experimental rig and air-tightness of device etc..After the completion of checking work, to air gap switch chamber
It is filled with high-purity N in vivo2, maximum pressure is no more than 0.4MPa.Oscillograph is set to suitable parameters, for conveniently observation electricity
Hold the collected waveform of divider.
2, the delicate grade pulse parameter setting in front end, is arranged its pulse amplitude, charging time, triggering side by pressurized control platform
Formula etc..
3, after the completion of preparation, can start to pressurize, acquisition pulse waveform is used for actual tests.
Claims (1)
1. a kind of nanosecond high pressure steep-sided pulse generator, the nanosecond high pressure steep-sided pulse generator includes power pack, molding
Line, air gap switch and test cavity are composed in series；Air gap switch be separately connected capacitive divider with and build-out resistor, wherein
The concatenated common point capacitor C of input resistance R1 and output resistance R2 constitutes capacitive divider, and main function is after measuring steepness
Pulse voltage；Air gap switch is by two with a thickness of 10mm, and the cylindrical, copper electrode that radius is 15mm forms, above and below two copper electrodes
Spacing is 10mm, and effect is within the rising edge to 10ns of steepness pulse；Air gap switch electrode is incorporated into closed transparent cavity
In, 360 degree of observations without dead angle are carried out by transparent cavity；The high-purity N no more than 0.4MPa is filled in cavity2；It is characterized in that,
Air gap switch is mounted at the top of test cavity；The high-voltage arm of air gap switch is electrode and capacitive divider copper sheet under air gap switch
Distributed couplings capacitor composition；The capacitor C of the low-voltage arm of air gap switch is the patch capacitor group in PCB circuit board, i.e., by 12
The chip capacitor of 150pF is formed in parallel, and by simulation calculation and test measurement, intrinsic standoff ratio 3600:1, frequency band is
85MHz；Pulse amplitude is controlled by adjusting electrode spacing and air pressure；One build-out resistor mounting hole of transparent cavity setting, one
A capacitive divider mounting hole；
The power pack is composed in series by pressurized control platform, Industrial Frequency Transformer and Marx generator, is then connect with form wire；
Main function is to generate front pulse, is charged to form wire, and realize the control in triggering times and triggered time.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510142185.4A CN104967429B (en) | 2015-03-27 | 2015-03-27 | A kind of nanosecond high pressure steep-sided pulse generator |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510142185.4A CN104967429B (en) | 2015-03-27 | 2015-03-27 | A kind of nanosecond high pressure steep-sided pulse generator |
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| CN104967429A CN104967429A (en) | 2015-10-07 |
| CN104967429B true CN104967429B (en) | 2019-01-15 |
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| CN111473942B (en) * | 2020-04-13 | 2021-05-28 | 西安交通大学 | Magnetic fluid acceleration system and acceleration optimization method based on wind tunnel |
| CN113567724B (en) * | 2021-07-26 | 2023-06-30 | 江苏警官学院 | Nanosecond-level fast-front high-voltage secondary voltage division measuring device and voltage division method |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101745178A (en) * | 2009-12-17 | 2010-06-23 | 重庆大学 | Portable high-voltage nanosecond squarer |
| US20120001498A1 (en) * | 2010-07-01 | 2012-01-05 | Mayes Jonathan R | Sequentially switched multiple pulse generator system |
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2015
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101745178A (en) * | 2009-12-17 | 2010-06-23 | 重庆大学 | Portable high-voltage nanosecond squarer |
| US20120001498A1 (en) * | 2010-07-01 | 2012-01-05 | Mayes Jonathan R | Sequentially switched multiple pulse generator system |
Non-Patent Citations (2)
| Title |
|---|
| 350 kV可变脉宽的纳秒脉冲发生器;王昕等;《高压电技术》;20030531;第31-32页 |
| 一种高压ns级脉冲形成电路;贺元吉等;《高压电技术》;20000831;第13-15页 |
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