CN207150551U - A kind of multi-gap gas switch of low activation threshold value - Google Patents
A kind of multi-gap gas switch of low activation threshold value Download PDFInfo
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- CN207150551U CN207150551U CN201720907474.3U CN201720907474U CN207150551U CN 207150551 U CN207150551 U CN 207150551U CN 201720907474 U CN201720907474 U CN 201720907474U CN 207150551 U CN207150551 U CN 207150551U
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Abstract
The utility model proposes a kind of multi-gap gas switch of low activation threshold value, solves the higher technical problem of requirement of the existing gas switch to trigger pulse amplitude.The multi-gap gas switch of the low activation threshold value, capacitance resistance network is introduced switching each gap, outer meeting resistance and electric capacity i.e. in parallel, Multiple level switch triggering threshold value can be reduced, make switch compared with low amplitude value trigger pulse act under can low jitter reliably turn on, be advantageous to simplify FLTD triggerings system, improve gas switch triggering performance, promote the application of FLTD pulse power supplies.By in the different electric capacity of each gap parallel connection capacitance of gas switch so that switch in trigger process voltage compared with centralized distribution in the minimum gap of shunt capacitance, cause the gap to be easier to puncture, can effectively reduce switch triggering threshold value.
Description
Technical field
It the utility model is related to a kind of multi-gap gas switch.
Background technology
Switch is one of core devices of pulse power device, and its performance directly affects the output characteristics of device, and gas is opened
Pass has the advantages that operating voltage is high, conduction electric current is big, triggering response is fast, low, low cost is shaken in triggering, in Pulse Power Techniques
Field and high pressure electrical technology field are widely used.
Gas switch is typically triggered using electric pulse at present, it is desirable to which trigger pulse has higher voltage magnitude.With FLTD
Exemplified by ± 100kV the multi-gap gas switch of (Fast Linear Transformer Driver) (Jiang Xiaofeng, Sun Fengju,
A kind of experimental study [J] High-Voltage Technologies of multi-gap gas switch breakdown characteristics of the such as Liang Tianxue, 2009 (01):103-
107), the gas switch is made up of 2 high-field electrodes and 5 annular electrodes, formed 6 spacing identical gas gaps, most in
Between annular electrode be trigger electrode.Before activation, the potential of high-field electrode is respectively+100kV and -100kV, trigger electrode
Potential is 0, and it is about 33kV that voltage is born in each gap.When applying trigger pulse on trigger electrode, with trigger pulse polarity phase
Over-voltage breakdown, remaining 3 gaps over-voltage breakdown in the environment of the ultraviolet light that discharges, switch are born simultaneously in 3 anti-gaps
Conducting.To ensure that switch triggering shake is less than 5ns, typically require that trigger pulse amplitude is more than 140kV.
Because gas switch requires higher to trigger pulse amplitude, cause triggering system complex huge, it is reliable to trigger cable
Property is difficult to ensure that.The general multistage boosting of triggering system at present, the technology path triggered step by step, required trigger pulse amplitude determine
Triggering system boosting series.By taking FLTD use ± 100kV gas switch Multi-path synchronous triggering systems as an example (in the such as Chen Lin, Wang Meng
Thing institute fast pulse linear type transformer driving source Research progress [J] High-Voltage Technologies, 2015 (06):1798-1806), it is
Ensure that triggering system output pulse voltage magnitude on matched load is more than 100kV (being applied to voltage 200kV on trigger electrode),
Triggering system is by synchronous machine, dynamo exploder, triggering Marx and can expand trigger element level Four boost configuration and forms.Trigger system bulk
Bulky complex, it is difficult to ensure its reliability and stability, it has also become the main restricting factor of FLTD devices development.
Utility model content
The utility model proposes a kind of multi-gap gas switch of the low activation threshold value based on resistance-capacitance network, solve
The higher technical problem of requirement of the existing gas switch to trigger pulse amplitude.
The utility model solves technical scheme used by its technical problem：
The multi-gap gas switch of low activation threshold value, including multi-gap gas switch body, be different from prior art is：
Each gap of multi-gap gas switch body is parallel with outer meeting resistance and external capacitor, at least one in all external capacitors
Individual electric capacity is different from the value of other electric capacity.
Based on above scheme, the utility model has also further made following optimization：
The resistance of all outer meeting resistances is identical.
Each outer meeting resistance R values are according to switch voltage U, maximum allowable leakage current ImAnd number of gaps n is determined,
Each external capacitor value determines that all external capacitor capacitances are at least than switch according to switch gap distribution capacity capacitance
The high magnitude of gap distribution capacitor's capacity.
The multi-gap gas switch body is mainly made up of high-field electrode, target, trigger electrode and insulation crust,
Wherein, high-field electrode and the axially distributed multiple gas gaps of connecting of formation of target, it is right respectively in the side of insulation crust
Should in each target opening position perforate, be placed with electrode draw pin, electrode draw pin one end connect with corresponding target
Touch, electrode is drawn the pin other end and is located at outside insulation crust, for connecting the outer meeting resistance and external capacitor while being also used for touching
Send out the introducing of pulse.
The outer meeting resistance is glaze resistance.
The external capacitor is ceramic condenser.
The beneficial effects of the utility model：
The utility model is switching each gap introducing capacitance resistance network, i.e., outer meeting resistance and electric capacity in parallel, can reduce
Multiple level switch triggering threshold value, make switch compared with low amplitude value trigger pulse act under can low jitter reliably turn on, be advantageous to letter
Change FLTD triggerings system, improve gas switch triggering performance, promote the application of FLTD pulse power supplies.
By in the different electric capacity of each gap parallel connection capacitance of gas switch so that switch voltage in trigger process is relatively concentrated
The minimum gap of shunt capacitance is allocated in, causes the gap to be easier to puncture, can effectively reduce switch triggering threshold value.
By in each gap parallel connection similar resistance resistance of gas switch so that switch each gap electricity during DC break down voltage
Pressure distribution is more uniform, can effectively reduce switch self discharge probability.
Brief description of the drawings
Fig. 1 is the longitudinal profile structure diagram of the utility model gas switch.
Fig. 2 is the low activation threshold value gas switch appearance schematic diagram that the utility model includes outer meeting resistance capacitance network.
Fig. 3 is each gap voltage distribution emulation knot in the utility model gas switch circuit parameter model and trigger process
Fruit.
In figure, high-field electrode on 1., 2. times high-field electrodes, 3. targets, 4. trigger electrodes, 5. electrodes extraction pin, 6.
Valve, 7. insulation crusts, 8. electrode supportings, 9. electrode insulation inserted sheets, 10 external capacitors, 11 outer meeting resistances.
Embodiment
The utility model is further illustrated with embodiment below in conjunction with the accompanying drawings.
A kind of six gap gas switch are as shown in Figure 1.Switch includes 2 high-field electrodes, 4 targets, 1 triggering electricity
Pole (centrally located target is trigger electrode), insulation crust, multiple electrodes support, multiple electrodes insulation are inserted
Piece, 5 electrodes draw pin and multiple external capacitors, resistance.
High-field electrode and the axially distributed multiple gas gaps of connecting of formation of target.In the side of insulation crust, often
The perforate of individual target corresponding position, place electrode and draw pin, electrode is drawn pin one end and contacted with corresponding target, another
End is convenient to connect outer meeting resistance and electric capacity outside insulation crust, and electrode corresponding to trigger electrode draws pin simultaneously for triggering
The introducing of pulse.Outer meeting resistance is glaze resistance, and each gap outer meeting resistance resistance is identical, and external capacitor is ceramic condenser, respectively
The different electric capacity of gap parallel connection capacitance.
Switching each gap parallel connection outer meeting resistance and electric capacity.Switch each gap voltage distribution during DC break down voltage is main
Influenceed by parallel resistance, by the outer meeting resistance of similar resistance in parallel, voltage is distributed in each gap uniformity.In trigger process
Each gap voltage distribution is mainly influenceed by shunt capacitance, by each gap different capacitance electric capacity in parallel, wherein some gap point
Higher trigger voltage is fitted on, the gap overvoltage factor is improved, makes the gap be more easy to puncture, residual gap is ultraviolet in electric discharge
Over-voltage breakdown, and then reduce switch triggering threshold value successively, improves switch triggering characteristic under the environment of light.
Installation process of the present utility model is that electrode supporting 8, electrode insulation inserted sheet 9 are stacked gradually on lower high-field electrode 2
And target 3, then insulation crust 7 is inserted in by upper end, pays attention to insulation crust 7 and the perforate of electrode supporting 8 in the process
Position is corresponding.Upper high-field electrode 1 is connected with lower high-field electrode 2 with insulation crust respectively, upper high-field electrode 1 and lower high-tension electricity
It is furnished with sealing ring on pole 2, valve 6 is installed on insulation crust 7.Electrode extraction pin 5 is inserted at the lateral opening hole of insulation crust 7, really
Protect and the good contact of target 3.Outer meeting resistance 11, external capacitor 10 are connected in each gap.
The gas switch circuit model that the utility model is related to and each gap voltage distribute simulation result as shown in figure 3, gas
Body switch is made up of gap 1~6, and each gap can be equivalent to insulaion resistance RGAnd stray capacitance CpParallel connection, wherein insulated electro
Hinder RGAbout 10G Ω, stray capacitance CpAbout 3pF.Each gap outer meeting resistance R in parallelH, resistance is 300M Ω, gap 1 with
The external capacitor C in parallel of gap 6H1Respectively 300pF, the external capacitor C in parallel with gap 5 of gap 2H2Respectively 100pF, gap 3 with
The external capacitor C in parallel of gap 4H3Respectively 3pF.
0~100ns is the pressure-resistant process of switch DC, switched charge ± 100kV, each gap withstanding voltage about 33kV,
It is electric as can be seen from Figure to trigger electrode, trigger pulse amplitude 140kV that the t=100ns moment applies trigger pulse
Pressure is compared with centralized distribution on gap 3, and compared with being not introduced into resistance-capacitance network situation, 3, gap overvoltage factor is by 1.4 increases
To 2.3, trigger pulse amplitude can be reduced to about 85kV by 140kV under identical shake.
Specification of the present utility model gives sufficient explanation, the tool of resistance-capacitance network to utility model content
Body parameter and mounting means can be set according to the actual requirements, and those of ordinary skill is enough by the utility model specification
Appearance is carried out.Under the framework of claim, any improvement based on the utility model thinking belongs to of the present utility model
Interest field.
Claims (7)
1. a kind of multi-gap gas switch of low activation threshold value, including multi-gap gas switch body, it is characterised in that：Multiple level
Each gap of gas switch body is parallel with outer meeting resistance and external capacitor, at least one electric capacity in all external capacitors
It is different from the value of other electric capacity.
2. the multi-gap gas switch of low activation threshold value according to claim 1, it is characterised in that：All outer meeting resistances
Resistance is identical.
3. the multi-gap gas switch of low activation threshold value according to claim 1 or 2, it is characterised in that：Each outer meeting resistance R
Value is according to switch voltage U, maximum allowable leakage current ImAnd number of gaps n is determined,
4. the multi-gap gas switch of low activation threshold value according to claim 1, it is characterised in that：Each external capacitor value
Determined according to switch gap distribution capacity capacitance, all external capacitor capacitances are at least higher than switch gap distribution capacity capacitance one
Magnitude.
5. the multi-gap gas switch of low activation threshold value according to claim 1, it is characterised in that：The Multiple level gas
Switch main body is mainly made up of high-field electrode, target, trigger electrode and insulation crust, wherein, high-field electrode and centre electricity
It is extremely axially distributed to form multiple series connection gas gaps, correspond respectively to the position of each target in the side of insulation crust
Place's perforate, electrode extraction pin is placed with, electrode is drawn pin one end and contacted with corresponding target, and electrode is drawn the pin other end and is located at
Outside insulation crust, for connecting the outer meeting resistance and external capacitor while being also used for the introducing of trigger pulse.
6. the multi-gap gas switch of low activation threshold value according to claim 1, it is characterised in that：The outer meeting resistance is
Glaze resistance.
7. the multi-gap gas switch of low activation threshold value according to claim 1, it is characterised in that：The external capacitor is
Ceramic condenser.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201720907474.3U CN207150551U (en) | 2017-07-25 | 2017-07-25 | A kind of multi-gap gas switch of low activation threshold value |
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| CN201720907474.3U CN207150551U (en) | 2017-07-25 | 2017-07-25 | A kind of multi-gap gas switch of low activation threshold value |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107395173A (en) * | 2017-07-25 | 2017-11-24 | 西北核技术研究所 | A kind of multi-gap gas switch of low activation threshold value |
| CN108832485A (en) * | 2018-06-14 | 2018-11-16 | 西北核技术研究所 | A kind of Multiple level series direct current gas switch of low activation threshold value |
-
2017
- 2017-07-25 CN CN201720907474.3U patent/CN207150551U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107395173A (en) * | 2017-07-25 | 2017-11-24 | 西北核技术研究所 | A kind of multi-gap gas switch of low activation threshold value |
| CN107395173B (en) * | 2017-07-25 | 2024-03-12 | 西北核技术研究所 | Multi-gap gas switch with low trigger threshold |
| CN108832485A (en) * | 2018-06-14 | 2018-11-16 | 西北核技术研究所 | A kind of Multiple level series direct current gas switch of low activation threshold value |
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