CN103490756A - Four-electrode bipolar pulse triggering gas switch and triggering method thereof - Google Patents
Four-electrode bipolar pulse triggering gas switch and triggering method thereof Download PDFInfo
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- CN103490756A CN103490756A CN201310379248.9A CN201310379248A CN103490756A CN 103490756 A CN103490756 A CN 103490756A CN 201310379248 A CN201310379248 A CN 201310379248A CN 103490756 A CN103490756 A CN 103490756A
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Abstract
The invention relates to a four-electrode bipolar pulse triggering gas switch which comprises an insulation outer barrel, a positive polarity high-voltage electrode, a negative polarity high-voltage electrode, triggering electrodes and working media, wherein the positive polarity high-voltage electrode and the negative polarity high-voltage electrode are arranged at the two ends of the insulation outer barrel respectively, the triggering electrodes are arranged between the positive polarity high-voltage electrode and the negative polarity high-voltage electrode, and the working media are arranged in the insulation outer barrel. The positive polarity high-voltage electrode and the negative polarity high-voltage electrode are connected with positive polarity direct-current high-voltages and negative polarity direct-current high-voltages respectively, the triggering electrodes comprise a negative polarity triggering electrode and a positive polarity triggering electrode, the positive polarity triggering electrode and the negative polarity triggering electrode are connected with positive polarity pulses and negative polarity pulses respectively, the negative polarity triggering electrode is adjacent to the positive polarity high-voltage electrode, and the positive polarity triggering electrode is adjacent to the negative polarity high-voltage electrode. The four-electrode bipolar pulse triggering gas switch solves the technical problems that an existing gas switch has high requirements for pulse triggering amplitude and is low in the overvoltage coefficient in the switch self-breakdown process.
Description
Technical field
The present invention relates to a kind of four electrode bipolar pulse-triggered gas switchs, main feature is to adopt the charging of both positive and negative polarity, and adopts the triggering that hockets of both positive and negative polar impulse, can realize low activation threshold value and low jitter.
Background technology
Switch has important function in the pulse power device, and its performance directly affects the output characteristic of device.Resistance and inductance because the operating voltage of gas switch is high, through-current capability is strong, conducting speed is fast, after conducting are little, but also can reuse, therefore most widely used general.But with solid switch, compare, the activation threshold value of gas switch is higher.
Existing gas switch adopts the single channel unipolar pulse to be triggered mostly, requires the amplitude of trigger impulse high, forward position is steep.Take Xibei Nuclear Techn Inst development ± as example, (Wei Hao etc. are published in the 881st page of " light laser and the particle beams " the 24th the 4th phase of volume to 100kV tri-electrode field distortion gas spark switch, " ± 100kV tri-electrode field distortion gas spark switch "), switch consists of two linner ball head high-field electrodes and a disk trigger electrode.Before triggering, be respectively+100kV of the electromotive force of high-field electrode and-100kV, the electromotive force of trigger electrode is 0; After apply+140kV trigger impulse, trigger electrode first punctures with-100kV high-field electrode, become-100kV of trigger electrode current potential, and under the effect of overvoltage and gap discharge, trigger electrode punctures with+100kV high-field electrode again, whole switch conduction.Switch punctures dispersion and mainly occurs in second process (self breakdown process).The service factor ratio of puncture voltage (operating voltage with) of supposing switch is 0.7, and the overvoltage factor of switch self breakdown process (applying the ratio of voltage and puncture voltage) is 1.4.
Existing gas switch is had relatively high expectations to the trigger impulse amplitude, and the overvoltage factor of switch self breakdown process is lower, has limited the application of switch in the pulse power device.
Summary of the invention
The purpose of this invention is to provide a kind of four electrode bipolar pulse-triggered gas switch and triggering method thereof, solved existing gas switch to the having relatively high expectations of trigger impulse amplitude, and the lower technical problem of overvoltage factor of switch self breakdown process.
Technical solution of the present invention:
A kind of four electrode bipolar pulse-triggered gas switchs, comprise insulation urceolus 5, be separately positioned on insulation urceolus two ends positive polarity high-field electrode 1 and negative polarity high-field electrode 4, be arranged on trigger electrode between positive polarity high-field electrode 1 and negative polarity high-field electrode 4, be arranged on the working media in insulation urceolus 5; Described positive polarity high-field electrode 1 and negative polarity high-field electrode 4 connect respectively the both positive and negative polarity high direct voltage; Its special character is:
Described trigger electrode comprises negative polarity trigger electrode 2 and positive polarity trigger electrode 3;
Described positive polarity trigger electrode 3 and negative polarity trigger electrode 2 connect respectively the both positive and negative polarity trigger impulse;
Described negative polarity trigger electrode 2 is adjacent with positive polarity high-field electrode 1, and described positive polarity trigger electrode 3 is adjacent with negative polarity high-field electrode 4.
Equidistant between above-mentioned positive polarity high-field electrode 1, negative polarity trigger electrode 2, positive polarity trigger electrode 3, negative polarity high-field electrode 4.
Distance between above-mentioned positive polarity high-field electrode 1, negative polarity trigger electrode 2, positive polarity trigger electrode 3, negative polarity high-field electrode 4 is 6mm.
Apply ± 100kV high direct voltage between above-mentioned positive polarity high-field electrode 1 and negative polarity high-field electrode 4; The trigger impulse of apply ± 70kV between described negative polarity trigger electrode 2 and positive polarity trigger electrode 3.
Above-mentioned working media is sulfur hexafluoride gas or nitrogen.
The method that above-mentioned four electrode bipolar pulse-triggered gas switchs trigger simultaneously, its special character is, comprises the following steps:
1] switch is off-state, between positive polarity high-field electrode 1 and negative polarity high-field electrode 4, applies respectively the both positive and negative polarity high direct voltage;
2] apply the both positive and negative polarity trigger impulse between positive polarity trigger electrode 3 and negative polarity trigger electrode 2 simultaneously;
3] between positive polarity high-field electrode 1 and negative polarity trigger electrode 2 and between positive polarity trigger electrode 3 and negative polarity high-field electrode 4, puncture respectively;
4] puncture the gas switch conducting between negative polarity trigger electrode 2 and positive polarity trigger electrode 3.
7, the method that four electrode bipolar pulse-triggered gas switchs trigger simultaneously according to claim 6 is characterized in that:
Apply respectively ± 100kV high direct voltage between described positive polarity high-field electrode 1 and negative polarity high-field electrode 4; The trigger impulse of simultaneously apply ± 70kV between described positive polarity trigger electrode 3 and negative polarity trigger electrode 2.
The method that above-mentioned four electrode bipolar pulse-triggered gas switch fine setting sequential trigger, its special character is: comprise the following steps:
1] switch is off-state, between positive polarity high-field electrode 1 and negative polarity high-field electrode 4, applies respectively the both positive and negative polarity high direct voltage;
2] positive polarity trigger electrode 3 applies the positive polarity trigger impulse;
3] between positive polarity high-field electrode 4 and negative polarity trigger electrode 3, puncture;
4] negative polarity trigger electrode 2 applies the negative polarity trigger impulse;
5] between negative polarity high-field electrode 2 and positive polarity trigger electrode 1, puncture;
6] puncture the gas switch conducting between negative polarity trigger electrode 2 and positive polarity trigger electrode 3.
Apply respectively ± 100kV high direct voltage between above-mentioned positive polarity high-field electrode 1 and negative polarity high-field electrode 4; The trigger impulse of apply respectively ± 70kV between described positive polarity trigger electrode 3 and negative polarity trigger electrode 2.
Beneficial effect of the present invention:
1, the stability of gas switch of the present invention is high.
If switch comprises two trigger electrodes, and adopt opposite polarity pulse while of two-way or the triggering that hockets chronologically, can greatly reduce the requirement of switch to the trigger impulse amplitude, and can improve the overvoltage factor of switch self breakdown process.The electromotive force of supposing the switch high-pressure electrode is still ± 100kV, between switch four electrodes for etc. gap, due to voltage approximate equal distribution between the high-field electrode of switch and trigger electrode, therefore the be respectively ± 33.3kV of electromotive force of two trigger electrodes, apply the become ± 100kV of electromotive force of trigger electrode after the two-way pulse-triggered.When the service factor of switch still is 0.7, the overvoltage factor of self breakdown process is 2.1, and the stability of the four electrode bipolar trigger switches that therefore the present invention relates to can be better than the gas switch that three electrode pulses trigger.
2, triggering time delay, the activation threshold value of gas switch of the present invention and shake low, to the trigger impulse amplitude require low.
The present invention has considered that the gas switch charging voltage coordinates with the polarity between trigger impulse, adopt the triggering that hockets of both positive and negative polar impulse, and can carry out the turn on process of control switch by the sequential of fine setting trigger impulse, be conducive to reduce triggering time delay and the shake of switch.With original three electrode unipolarity trigger switches, compare, while adopting bipolar pulse to trigger, the amplitude of trigger impulse is only half of original mode.
As previously mentioned, original three electrode unipolarity trigger switches, after trigger electrode and a side high-field electrode puncture, remain the gap of a side by over-voltage breakdown, the service factor that overvoltage factor is 2 times, switch.The switch the present invention relates to is four electrode structures, after high-field electrode and trigger electrode puncture, and the service factor that the overvoltage factor of residual gap is 3 times, switch.From the analysis of turn on process, trigger simultaneously or trigger by the fine setting sequential, all be conducive to the activation threshold value and the low jitter that realize that switch is low.While triggering, because electric discharge occurs in a plurality of gaps simultaneously, also help the triggering time delay that reduces switch simultaneously.
The accompanying drawing explanation
Fig. 1 is the vertical section structure figure of the present invention's four electrode bipolar pulse-triggered gas switchs;
In figure: 1-positive polarity high-field electrode, 2-negative polarity trigger electrode, 3-positive polarity trigger electrode, 4-negative polarity high-field electrode, the 5-urceolus that insulate.
Embodiment
The present invention relates to a kind of gas switch of four electrode structures, comprise two high-field electrodes and two trigger electrodes, and adopt the pulse-triggered of both positive and negative polarity.Triggering moment, the polarity of voltage on high-field electrode and trigger electrode is by positive and negative, positive and negative sequence alternate.
Fig. 1 is vertical section structure figure of the present invention.Can reach ± 100kV of this four electrode switch maximum operating voltage, employing ± 70kV pulse is triggered.Be equidistantly between high-field electrode and trigger electrode, trigger electrode and trigger electrode, be 6mm, working media can adopt sulfur hexafluoride gas, nitrogen or the mixing of the two.
While triggering simultaneously, the course of work of the present invention is as follows: (1) switch is off-state, apply respectively ± 100kV of high-field electrode high direct voltage, between switch four electrodes for etc. gap, voltage is approximate equal distribution between the high-field electrode of switch and trigger electrode, so be respectively ± 33.3kV of the electromotive force of trigger electrode; (2) trigger impulse of two-way ± 70kV is applied on the trigger electrode of switch simultaneously, electrical potential difference between high-field electrode and trigger electrode becomes 170kV, average field intensity is 2.55 times before triggering, and the average field intensity between trigger electrode is 2.10 times before triggering; (3) high-field electrode and trigger electrode first puncture, become ± 100kV of trigger electrode electromotive force, and average field intensity is 3 times before triggering; (4) between positive and negative two trigger electrodes, puncture, whole switch is conducting state.
When the fine setting sequential triggers, take and first apply the positive polarity trigger impulse as example, the course of work of the present invention is as follows: (1) switch is off-state, apply respectively ± 100kV of high-field electrode high direct voltage, due between switch four electrodes for etc. gap, voltage is approximate equal distribution between the high-field electrode of switch and trigger electrode, so be respectively ± 33.3kV of trigger electrode electromotive force; (2) trigger impulse of apply+70kV is to the positive polarity trigger electrode, and now between negative polarity high-field electrode and positive polarity trigger electrode, electrical potential difference becomes 170kV, and average field intensity is 2.55 times before triggering; (3) switch negative polarity high-field electrode and positive polarity trigger electrode puncture, become-100kV of trigger electrode electromotive force, and the average field intensity between positive and negative two trigger electrodes is 0.55 times before triggering, and can not puncture; (4) apply-70kV trigger impulse is to the negative polarity trigger electrode, now between positive polarity high-field electrode and negative polarity trigger electrode, electrical potential difference becomes 170kV, average field intensity is 2.55 times before triggering, and the average field intensity between positive and negative two trigger electrodes is 0.45 times before triggering, still can not puncture; (5) switch positive polarity high-field electrode and negative polarity trigger electrode puncture, become respectively ± 100kV of trigger electrode electromotive force, and average field intensity is 3 times before triggering; (6) puncture whole switch conduction between positive and negative two trigger electrodes.
The principle of the invention:
When bipolar pulse alternately is applied to the switch triggering utmost point simultaneously, in switch, the gapped electric field that simultaneously occurs strengthens and forms electric discharge.By optimizing the trigger electrode position, make electric field between trigger electrode and high-field electrode when between trigger electrode, electric field is stronger, high-field electrode can first puncture with trigger electrode, the trigger electrode electromotive force is changed into the electromotive force of corresponding high-field electrode afterwards, puncture whole switch conduction between two trigger electrodes under overvoltage and original electric discharge impact.Also applying constantly of fine-tuning two-way trigger impulse, the conducting in each gap order in control switch.
Claims (9)
1. an electrode bipolar pulse-triggered gas switch, comprise insulation urceolus (5), be separately positioned on insulation urceolus two ends positive polarity high-field electrode (1) and negative polarity high-field electrode (4), be arranged on trigger electrode between positive polarity high-field electrode (1) and negative polarity high-field electrode (4), be arranged on the interior working media of urceolus (5) that insulate; Described positive polarity high-field electrode (1) and negative polarity high-field electrode (4) connect respectively the both positive and negative polarity high direct voltage;
It is characterized in that:
Described trigger electrode comprises negative polarity trigger electrode (2) and positive polarity trigger electrode (3);
Described positive polarity trigger electrode (3) and negative polarity trigger electrode (2) connect respectively the both positive and negative polarity trigger impulse;
Described negative polarity trigger electrode (2) is adjacent with positive polarity high-field electrode (1), and (3 with the negative polarity high-field electrode, (4 is adjacent for described positive polarity trigger electrode.
2. four electrode bipolar pulse-triggered gas switchs according to claim 1, is characterized in that: equidistant between described positive polarity high-field electrode (1), negative polarity trigger electrode (2), positive polarity trigger electrode (3), negative polarity high-field electrode (4).
3. four electrode bipolar pulse-triggered gas switchs according to claim 2 is characterized in that: the distance between described positive polarity high-field electrode (1), negative polarity trigger electrode (2), positive polarity trigger electrode (3), negative polarity high-field electrode (4) is 6mm.
4. according to claim 1 or 2 or 3 described four electrode bipolar pulse-triggered gas switchs, it is characterized in that: apply ± 100kV high direct voltage between described positive polarity high-field electrode (1) and negative polarity high-field electrode (4); The trigger impulse of apply ± 70kV between described negative polarity trigger electrode (2) and positive polarity trigger electrode (3).
5. four electrode bipolar pulse-triggered gas switchs according to claim 4, it is characterized in that: described working media is sulfur hexafluoride gas or nitrogen.
6. the method that the described four electrode bipolar pulse-triggered gas switchs of claim 1 trigger simultaneously, is characterized in that, comprises the following steps:
1] switch is off-state, between positive polarity high-field electrode (1) and negative polarity high-field electrode (4), applies respectively the both positive and negative polarity high direct voltage;
2] apply the both positive and negative polarity trigger impulse between positive polarity trigger electrode (3) and negative polarity trigger electrode (2) simultaneously;
3] between positive polarity high-field electrode (1) and negative polarity trigger electrode (2) and between positive polarity trigger electrode (3) and negative polarity high-field electrode (4), puncture respectively;
4] puncture the gas switch conducting between negative polarity trigger electrode (2) and positive polarity trigger electrode (3).
7. the method that four electrode bipolar pulse-triggered gas switchs trigger simultaneously according to claim 6 is characterized in that:
Apply respectively ± 100kV high direct voltage between described positive polarity high-field electrode (1) and negative polarity high-field electrode (4); The trigger impulse of simultaneously apply ± 70kV between described positive polarity trigger electrode (3) and negative polarity trigger electrode (2).
8. the method that the described four electrode bipolar pulse-triggered gas switch fine setting sequential of claim 1 trigger is characterized in that: comprise the following steps:
1] switch is off-state, between positive polarity high-field electrode (1) and negative polarity high-field electrode (4), applies respectively the both positive and negative polarity high direct voltage;
2] positive polarity trigger electrode (3) applies the positive polarity trigger impulse;
3] between positive polarity high-field electrode (4) and negative polarity trigger electrode (3), puncture;
4] negative polarity trigger electrode (2) applies the negative polarity trigger impulse;
5] between negative polarity high-field electrode (2) and positive polarity trigger electrode (1), puncture;
6] puncture the gas switch conducting between negative polarity trigger electrode (2) and positive polarity trigger electrode (3).
9. the method that four electrode bipolar pulse-triggered gas switch fine setting sequential trigger according to claim 8 is characterized in that:
Apply respectively ± 100kV high direct voltage between described positive polarity high-field electrode (1) and negative polarity high-field electrode (4); The trigger impulse of apply respectively ± 70kV between described positive polarity trigger electrode (3) and negative polarity trigger electrode (2).
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| CN201310379248.9A CN103490756B (en) | 2013-08-27 | 2013-08-27 | Four-electrode bipolar pulse triggering gas switch and triggering method thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| 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 |
| CN108390257A (en) * | 2018-05-24 | 2018-08-10 | 西北核技术研究所 | A kind of light pulse triggering gas switch that optical fiber introduces |
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| US20080106840A1 (en) * | 2004-12-22 | 2008-05-08 | Ivanhoe Industries, Inc. | Multichannel Spark-Gap with Multiple Intervals and Pulsed High-Power Generator |
| CN102013636A (en) * | 2010-10-22 | 2011-04-13 | 西安交通大学 | Planar multi-channel discharge three-electrode coaxial gas spark switch |
| CN102565641A (en) * | 2011-12-29 | 2012-07-11 | 西北核技术研究所 | Optical fiber detection system for diagnosing parameter of multi-gap gas switch |
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2013
- 2013-08-27 CN CN201310379248.9A patent/CN103490756B/en not_active Expired - Fee Related
Patent Citations (3)
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| US20080106840A1 (en) * | 2004-12-22 | 2008-05-08 | Ivanhoe Industries, Inc. | Multichannel Spark-Gap with Multiple Intervals and Pulsed High-Power Generator |
| CN102013636A (en) * | 2010-10-22 | 2011-04-13 | 西安交通大学 | Planar multi-channel discharge three-electrode coaxial gas spark switch |
| CN102565641A (en) * | 2011-12-29 | 2012-07-11 | 西北核技术研究所 | Optical fiber detection system for diagnosing parameter of multi-gap gas switch |
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Cited By (4)
| 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 |
| CN108390257A (en) * | 2018-05-24 | 2018-08-10 | 西北核技术研究所 | A kind of light pulse triggering gas switch that optical fiber introduces |
| CN108390257B (en) * | 2018-05-24 | 2023-12-15 | 西北核技术研究所 | Optical pulse triggering gas switch introduced by optical fiber |
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