CN103248264A - Trigger for triggering Trigatron gas switch - Google Patents
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- 238000010168 coupling process Methods 0.000 claims description 5
- 238000005859 coupling reaction Methods 0.000 claims description 5
- 238000010891 electric arc Methods 0.000 claims description 4
- 229910052710 silicon Inorganic materials 0.000 claims description 4
- 239000010703 silicon Substances 0.000 claims description 4
- 230000001960 triggered effect Effects 0.000 claims description 3
- 230000001681 protective effect Effects 0.000 description 9
- 230000001105 regulatory effect Effects 0.000 description 9
- 230000007274 generation of a signal involved in cell-cell signaling Effects 0.000 description 6
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 3
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Abstract
本发明公开了一种用于触发Trigatron气体开关的触发器，包括相并联的脉冲高电压产生部分和脉冲电流产生部分；脉冲高电压部分与脉冲电流产生部分之间通过隔直电容和磁开关连接；触发器工作时先输出脉冲电压，后输出脉冲电流。所述触发器工作时，脉冲触发电压先作用于Trigatron气体开关的触发间隙，触发间隙被脉冲高电压击穿后，脉冲电流产生部分为放电产生和维持等离子体提供能量。所述触发器的输出电压极性、脉冲变压器参数和脉冲电流产生部分参数均可根据需要进行调节。
The invention discloses a trigger for triggering a Trigatron gas switch, comprising a pulse high voltage generating part and a pulse current generating part connected in parallel; the pulse high voltage part and the pulse current generating part are connected through a DC blocking capacitor and a magnetic switch ; When the trigger works, it outputs pulse voltage first, and then outputs pulse current. When the trigger is working, the pulse trigger voltage first acts on the trigger gap of the Trigatron gas switch. After the trigger gap is broken down by the pulse high voltage, the pulse current generating part provides energy for the discharge to generate and maintain the plasma. The polarity of the output voltage of the trigger, the parameters of the pulse transformer and the parameters of the pulse current generating part can all be adjusted as required.
Description
Technical field
The invention belongs to gas switch triggering technique field, relate to a kind of for the trigger that triggers the Trigatron gas switch.
Background technology
The Trigatron gas switch adopts pulse transformer to trigger as the vitals in the impulse power electrical source device more.Pulse transformer not only can be for the Trigatron gas switch provides required trigger voltage, and certain triggering energy can be provided.
At present, can carry out a large amount of experimental studies to the triggering puncture principle of Trigatron gas switch both at home and abroad, obtain comparatively complete notional result.Show at the experimental study aspect the service behaviour of Trigatron gas switch, the service behaviour of Trigatron gas switch is along with the increase of pulse-triggered voltage magnitude and reducing of rising edge ascending time, and the increase of the operating voltage range of switch, puncture time delay and shake reduce; The life-span of switch mainly is subjected to the influence of through-current capacity, electrode material and structure.The service behaviour of Trigatron gas switch is also relevant with the triggering energy, and experiment shows that the operating voltage range of switch increases along with the increase that triggers energy.
The pulse transformer that is used for the triggering of Trigatron gas switch at present mainly is made of circuits for triggering, controlled switch, storage capacitor and pulse transformer.Storage capacitor is connected with the former limit of pulse transformer, and storage capacitor is exported the pulse voltage in high amplitude, fast forward position by the former edge discharge of pulse transformer by the coupling of transformer when the controlled switch conducting.Because the finite energy that pulse transformer can be exported, so the energy that whole pulse trigger can provide for Trigatron is limited.
Along with to the further research of Trigatron gas switch service behaviour and the optimization of structure, require the trigger of Trigatron gas switch can provide the trigger voltage in high amplitude, fast forward position and enough energy so that switch reliable and stable work under low under-voltage ratio.Yet, because pulse transformer output finite energy makes it can not satisfy the Trigatron gas switch to the requirement of trigger.
Summary of the invention
Deficiency at above-mentioned conventional trigger mode, the objective of the invention is to propose a kind of for the trigger that triggers the Trigatron gas switch, this trigger adopts the combiner circuit of high voltage and big electric current, has overcome the defective of traditional trigger output energy shortage.
The present invention is achieved through the following technical solutions:
A kind of for the trigger that triggers the Trigatron gas switch, comprise that the pulse high-voltage that is in parallel produces part and pulse current produces part;
Pulse high-voltage generating unit branch comprises pulsed capacitance and the pulse transformer that constitutes the loop with power supply, one end of pulsed capacitance connects power supply, the other end connects the former limit of pulse transformer, and the two ends of power supply also are parallel with controlled switch, and the 3rd end of controlled switch also is connected with the triggering signal generation device; The high-pressure side of pulse transformer secondary is connected with trigger electrode by capacitance, and ground electrode is connected with the low-pressure end of pulse transformer secondary;
Pulse current generating unit branch comprises DC power supply, and DC power supply is charged to storage capacitor through current-limiting resistance, and magnetic switch is serially connected with between storage capacitor and the trigger electrode, also is parallel with bleeder resistance between ground electrode and trigger electrode; Gap between ground electrode and the trigger electrode constitutes the triggering gap of Trigatron gas switch.
One end of described pulsed capacitance is connected with an end of controlled switch, and the other end of pulsed capacitance is connected to an end on the former limit of pulse transformer, and the other end on the former limit of pulse transformer is connected with the other end of controlled switch; The 3rd end of controlled switch connects the triggering signal generation device, and controlled switch is controlled its break-make by the triggering signal generation device.
Described pulse high-voltage produces part and is powered after filter protective circuit filtering by AC power; one end of filter protective circuit is connected with an end of pulsed capacitance with protective resistance by high voltage silicon stack, and the other end of pulsed capacitance is connected and ground connection with the other end of filter protective circuit through the former limit of pulse transformer.
Described at pulsed capacitance an end and ground between be parallel with diode; Two ends on the former limit of pulse transformer also are parallel with voltage-stabiliser tube.
The described controlled switch of working as is in the state of cut-offfing, and pulse current produces part to the storage capacitor DC charging;
After the controlled switch conducting, pulsed capacitance discharges to the circuit loop that is made of the former limit of pulse transformer and controlled switch, and forms pulse voltage on the former limit of pulse transformer, and pulse voltage is through the coupling output high-voltage pulse of pulse voltage device; This moment, magnetic switch was in forward magnetic saturation state, and the pulse high-voltage of pulse transformer output is limited by magnetic switch and makes it directly act on the triggering gap;
Trigger the gap and be elevated in pulse voltage and puncture after triggering the gap breakdown magnitude of voltage, bleeder resistance is by short circuit, and magnetic switch is oppositely saturated gradually simultaneously, produce the discharge loop conducting of part at pulse current after, storage capacitor through magnetic switch to triggering the gap repid discharge.
Described after pulse current produces discharge loop conducting partly, the storage capacitor continuous discharge triggers arc discharge generation plasma in the gap.
Described after the controlled switch conducting, trigger elder generation voltage pulse output, back output pulse current; The pulse voltage of trigger output and the time interval of pulse current are regulated by the volt-second characteristic of adjusting magnetic switch; By regulating the duration that current pulse width comes the regulating impulse electric current, current pulse width is realized by the capacitance of adjusting storage capacitor and the pulsactor of magnetic switch.
Described trigger is connected with trigger electrode or ground electrode by cable.
Described capacitance produces part for the protection of pulse current, avoids storage capacitor by the pulse transformer secondary short circuit;
Magnetic switch is not partially absorbed by the pulse current generation for the protection of the pulse voltage of pulse transformer secondary output, and avoids pulse voltage paired pulses current generation section branch to damage.
Described bleeder resistance makes magnetic switch be in the forward saturation condition before pulse voltage arrives, with the influence of isolation pulse voltage paired pulses current generation section branch, and the current potential of restriction trigger electrode.
Compared with prior art, the present invention has following beneficial technical effects:
Provided by the invention for the trigger that triggers the Trigatron gas switch, comprise that the pulse high-voltage that is in parallel produces part and pulse current produces part; After the controlled switch conducting, trigger elder generation voltage pulse output, back output pulse current; Having increased independently when guaranteeing pulse high-voltage output like this, pulse current produces part, not only realized the load gap to trigger in the requirement aspect the pulse voltage, and can provide suitable electric current and energy according to the requirement of load, pulse current produces the continuous discharge discharge of part, allow the gap continue to produce plasma, be conducive to the control of Trigatron gas switch; Can reduce simultaneously energy that pulse transformer provides to improve the performance of pulse transformer.
With use pulse transformer to make the Trigatron gas switch trigger gap breakdown to cause that Trigatron gas switch closure compares, trigger provided by the invention triggers the Trigatron gas switch can provide enough energy for the switch triggering gap discharge, the Trigatron gas switch is easy to closure, operating voltage range increases, and functional reliability improves greatly.Leak resistance is parallel to the triggering gap and makes that the current potential that triggers the preceding trigger electrode of gap breakdown is clamped down in the low pressure energy storage discharge loop simultaneously, has improved the job stability of Trigatron gas switch.
Provided by the invention for the trigger that triggers the Trigatron gas switch, described trigger adopts capacitance and magnetic switch partly with between the pulse current generating unit is divided to be connected at pulse high-voltage.Capacitance is set has protected pulse current to produce part, avoid it by short circuit, guaranteed that the trigger energy storage section can provide pulse current, and the operating voltage height of capacitance, be easy to obtain, the cost of igniter reduces, functional reliability improves;
Magnetic switch is set has protected the pulse voltage of output not partially absorbed by the pulse current generation, the output of having demonstrate,proved pulse high-voltage directly acts on and triggers the gap, and has avoided pulse high-voltage paired pulses current generation section branch to damage; Compare with using diode, the employing of capacitance and magnetic switch has guaranteed stability and the reliability of trigger.
Provided by the invention for the trigger that triggers the Trigatron gas switch, elder generation's voltage pulse output during described flip-flop operation, back output pulse current, it is the triggering gap that pulse-triggered voltage acts on the Trigatron gas switch earlier, after the triggering gap was punctured by pulse high-voltage, the pulse current generating unit is divided into its discharge generation and keeps plasma provided energy.In addition, the time interval of the pulse voltage of trigger output and pulse current can be regulated by the volt-second characteristic of regulating magnetic switch; The duration of pulse current can be regulated by current pulse width, just regulates width by the pulsactor of capacitance and magnetic switch; The polarity of described trigger output voltage also can change by output and the DC power supply that changes pulse transformer, to satisfy load to the requirement of trigger polarity.
It is provided by the invention that the Trigatron gas switch can reliably puncture under far below the situation of self-breakdown voltage for the trigger that triggers the Trigatron gas switch, height under-voltage than the time Trigatron gas switch puncture time delay and shake reduce.Compare traditional triggering mode, the operating voltage range of Trigatron gas switch increases, and the dispersiveness of discharge reliability and discharge time delay all is greatly improved.
Provided by the invention for the trigger that triggers the Trigatron gas switch, by structural parameters and circuit parameter, produce the parameter of part such as output voltage polarity, pulse transformer parameter and the pulse current of trigger, can obtain different trigger voltages and stored energy, thereby meet the different needs; Except the Trigatron gas switch, trigger also can be applicable to spark gap and other need produce the field of high speed plasma.
Description of drawings
Fig. 1 is structural representation of the present invention.
Embodiment
The present invention is described in further detail below in conjunction with specific embodiment, and the explanation of the invention is not limited.
Referring to Fig. 1, a kind of for the trigger that triggers the Trigatron gas switch, comprise that the pulse high-voltage that is in parallel produces part and pulse current produces part;
Pulse high-voltage generating unit branch comprises pulsed capacitance and the pulse transformer that constitutes the loop with power supply, one end of pulsed capacitance connects power supply, the other end connects the former limit of pulse transformer, and the two ends of power supply also are parallel with controlled switch, and the 3rd end of controlled switch also is connected with the triggering signal generation device; The high-pressure side of pulse transformer secondary is connected with trigger electrode by capacitance, ground electrode be connected with the low-pressure end of pulse transformer secondary (being connected load);
Pulse current generating unit branch comprises DC power supply, and DC power supply is charged to storage capacitor through current-limiting resistance, and magnetic switch is serially connected with between storage capacitor and the trigger electrode, also is parallel with bleeder resistance between ground electrode and trigger electrode;
Gap between ground electrode and the trigger electrode constitutes the triggering gap of Trigatron gas switch.
Concrete, an end of pulsed capacitance is connected with an end of controlled switch, and the other end of pulsed capacitance is connected to an end on the former limit of pulse transformer, and the other end on the former limit of pulse transformer is connected with the other end of controlled switch; The 3rd end of controlled switch connects the triggering signal generation device, and controlled switch is controlled its break-make by the triggering signal generation device.
Described pulse high-voltage produces part and is powered after filter protective circuit filtering by AC power; one end of filter protective circuit is connected with an end of pulsed capacitance with protective resistance by high voltage silicon stack, and the other end of pulsed capacitance is connected and ground connection with the other end of filter protective circuit through the former limit of pulse transformer.Wherein, high voltage silicon stack mainly act as rectification, and alternating current is converted to direct current; And protective resistance mainly is to play metering function.
Further, in order to overcome the reverse energy storage that pulsed capacitance when discharge produces, between an end of pulsed capacitance and ground, be parallel with diode; Two ends on the former limit of pulse transformer also are parallel with voltage-stabiliser tube, prevent the overtension on the former limit of pulse transformer.
Pulse high-voltage partly with between the pulse current generating unit is divided is connected with magnetic switch by capacitance; Elder generation's voltage pulse output during flip-flop operation, back output pulse current.
Controlled switch is controlled its break-make by triggering control signal, and when controlled switch is in the state of cut-offfing, pulse current produces part to the storage capacitor DC charging;
After the controlled switch conducting, pulsed capacitance discharges to the circuit loop that is made of the former limit of pulse transformer and controlled switch, and forms pulse voltage on the former limit of pulse transformer, and pulse voltage is through the coupling output high-voltage pulse of pulse voltage device; This moment, magnetic switch was in forward magnetic saturation state, and the pulse high-voltage of pulse transformer output is limited by magnetic switch and makes it directly act on the triggering gap;
Trigger the gap and be elevated in pulse voltage and puncture after triggering the gap breakdown magnitude of voltage, bleeder resistance is by short circuit, and magnetic switch is oppositely saturated gradually simultaneously, produce the discharge loop conducting of part at pulse current after, storage capacitor through magnetic switch to triggering the gap repid discharge.
Provide a specific embodiment below:
Triggering body employing 220V AC rectification is the pulse capacitor charging.Before not receiving triggering signal, controlled switch is in the state of cut-offfing, and pulse current generation part is owing to the existence of capacitance is in to storage capacitor DC charging state DC power supply.After controlled switch is applied triggering signal, the controlled switch conducting, the circuit discharging that pulsed capacitance constitutes to the former limit of pulse transformer and controlled switch, and form pulse voltage on the former limit of pulse transformer.Pulse voltage is through the higher pulse voltage of coupling output amplitude of pulse voltage device.Because magnetic switch is in forward magnetic saturation state, the pulse high-voltage of pulse transformer output is limited by magnetic switch and makes it directly act on the triggering gap.Trigger the gap and puncture after pulse voltage is elevated to certain value, bleeder resistance is by short circuit, and the low pressure storage capacitor triggers the gap arc discharge and produces plasma through the magnetic switch repid discharge.
Described after pulse current produces discharge loop conducting partly, the storage capacitor continuous discharge triggers arc discharge generation plasma in the gap.
And after the controlled switch conducting, trigger elder generation voltage pulse output, back output pulse current; The pulse voltage of trigger output and the time interval of pulse current are regulated by the volt-second characteristic of adjusting magnetic switch; By regulating the duration that current pulse width comes the regulating impulse electric current, current pulse width is realized by the capacitance of adjusting storage capacitor and the pulsactor of magnetic switch.
Described trigger is connected with trigger electrode or ground electrode by cable, and it is little to connect energy loss by cable.
Described capacitance produces part for the protection of pulse current, avoids storage capacitor by the pulse transformer secondary short circuit;
Magnetic switch is not partially absorbed by the pulse current generation for the protection of the pulse voltage of pulse transformer secondary output, and avoids pulse voltage paired pulses current generation section branch to damage.
Described bleeder resistance makes magnetic switch be in the forward saturation condition before pulse voltage arrives, with the influence of isolation pulse voltage paired pulses current generation section branch, and the current potential of restriction trigger electrode.
The output voltage polarity of described trigger, pulse transformer parameter and pulse current produce the parameter of part and all can regulate as required.
Adopt conventional pulse transformer to trigger the main gap distance and be respectively 5mm, 8mm and 12mm, triggering clearance distance is the Trigatron gas switch of 1.25mm, and the minimum of the switch under-voltage ratio of working is about 40%.And employing storage capacitor capacity is 10 μ F, charging voltage is+1100kV, and pulse voltage is 15kV, and output polarity is that positive trigger is when triggering, the all reliably conductings under 6% under-voltage ratio of Trigatron gas switch, and this moment switch shake also littler.By test, verified that institute's invention trigger has good electric property, can trigger voltage is provided and trigger energy for the Trigatron gas switch reliably, and this trigger be stable and reliability is good, long service life.Described trigger can suitably be adjusted each component parameters as required to obtain needed trigger voltage and to trigger energy.
Provide the embodiment that some parameters change below.
Embodiment 1:
Present embodiment is a kind of trigger for the Trigatron gas switch, and its discharge loop schematic diagram as shown in Figure 1.The low pressure storage capacitor capacity that pulse current produces part is 10 μ F, and charging voltage is+1100kV; Positive pulse voltage and the pulse current of described trigger output 15kV.The Trigatron gas switch triggers the gap when being 1.25mm, adopts this trigger to trigger, switch can be under 6% under-voltage ratio reliably working.
Embodiment 2:
Present embodiment is a kind of trigger for the Trigatron gas switch, and its discharge loop schematic diagram as shown in Figure 1.The low pressure storage capacitor capacity that pulse current produces part is 10 μ F, and charging voltage is 800kV; Positive pulse voltage and the pulse current of described trigger output 30kV.The Trigatron gas switch triggers the gap when being 1.25mm, adopts this trigger to trigger, switch can be under 4% under-voltage ratio reliably working.
Embodiment 3:
Present embodiment is a kind of trigger for the Trigatron gas switch, and its discharge loop schematic diagram as shown in Figure 1.The low pressure storage capacitor capacity that pulse current produces part is 5 μ F, and charging voltage is-1100kV; Positive pulse voltage and the pulse current of described trigger output-15kV.The Trigatron gas switch triggers the gap when being 1.25mm, adopts this trigger to trigger, switch can be under 15% under-voltage ratio reliably working.
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| CN105307367A (en) * | 2015-09-14 | 2016-02-03 | 西安交通大学 | Circuit used for prolonging service life of two-electrode gas switch and method |
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