CN103248264B - A kind of trigger for triggering Trigatron gas switch - Google Patents
A kind of trigger for triggering Trigatron gas switch Download PDFInfo
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Abstract
The invention discloses a kind of trigger for triggering Trigatron gas switch, comprising the pulse high-voltage generating portion and pulse current generating portion that are in parallel; Be connected by capacitance and magnetic switch between pulse high-voltage part with pulse current generating portion; First voltage pulse output during flip-flop operation, rear output pulse current.During described flip-flop operation, pulse-triggered voltage first acts on the triggered gap of Trigatron gas switch, and after triggered gap is punctured by pulse high-voltage, pulse current generating portion produces for electric discharge and maintain plasma provides energy.The output voltage polarity of described trigger, pulse transformer parameter and pulse current generating portion parameter all can regulate as required.
Description
Technical field
The invention belongs to gas switch triggering technique field, relating to a kind of trigger for triggering Trigatron gas switch.
Background technology
Trigatron gas switch is as the vitals in impulse power electrical source device, and the pulse transformer that adopts triggers more.Pulse transformer not only can provide required trigger voltage for Trigatron gas switch, and can provide certain trigger energy.
At present, principle is punctured to the triggering of Trigatron gas switch both at home and abroad and can carry out a large amount of experimental studies, obtained comparatively complete notional result.Experimental study in the service behaviour of Trigatron gas switch shows, the increase of service behaviour along with pulse-triggered voltage magnitude of Trigatron gas switch and the reduction of rising edge ascending time, the operating voltage range of switch increases, breakdown time delay and shake reduce; The life-span of switch is mainly subject to the impact of through-current capacity, electrode material and structure.The service behaviour of Trigatron gas switch is also relevant with trigger energy, and experiment shows that the operating voltage range of switch increases along with the increase of trigger energy.
The pulse transformer triggered for Trigatron gas switch is at present formed primarily of circuits for triggering, controlled switch, storage capacitor and pulse transformer.Storage capacitor is connected with the former limit of pulse transformer, and when controlled switch conducting, storage capacitor is by pulse transformer former limit electric discharge, is exported the pulse voltage of amplitude, fast rise time by the coupling of transformer.Due to the finite energy that pulse transformer can export, the energy that therefore 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 that the trigger of Trigatron gas switch can provide the trigger voltage of amplitude, fast rise time and enough energy with the work making switch reliable and stable under low under-voltage ratio.But, make it can not meet the requirement of Trigatron gas switch to trigger because pulse transformer exports finite energy.
Summary of the invention
For the deficiency of above-mentioned conventional trigger mode, the object of the invention is to propose a kind of trigger for triggering Trigatron gas switch, this trigger adopts the combiner circuit of high voltage and big current, overcomes the defect that traditional trigger exports energy shortage.
The present invention is achieved through the following technical solutions:
For triggering a trigger for Trigatron gas switch, comprise the pulse high-voltage generating portion and pulse current generating portion that are in parallel;
Pulse high-voltage generating portion comprises and the pulsed capacitance in electric power generating composition loop and pulse transformer, 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 are also parallel with controlled switch, and the 3rd end of controlled switch is also connected with 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 portion 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 trigger electrode, between ground electrode and trigger electrode, be also parallel with bleeder resistance; Gap between ground electrode and trigger electrode forms the triggered gap of Trigatron gas switch.
One end of described pulsed capacitance is connected with one end of controlled switch, and the other end of pulsed capacitance is connected to the one end on the former limit of pulse transformer, and the former other end on limit of pulse transformer is connected with the other end of controlled switch; The three-terminal link triggering signal generation device of controlled switch, controlled switch controls its break-make by triggering signal generation device.
Described pulse high-voltage generating portion is powered after filter protective circuit filtering by AC power; one end of filter protective circuit is connected with one 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 pulse transformer primary side.
Diode is parallel with between described one end at pulsed capacitance and ground; Also voltage-stabiliser tube is parallel with at the two ends on the former limit of pulse transformer.
Described controlled switch of working as is in the state of cut-offfing, and pulse current generating portion is to storage capacitor DC charging;
When after controlled switch conducting, pulsed capacitance to the circuit loop electric discharge be made up of the former limit of pulse transformer and controlled switch, and forms pulse voltage on the former limit of pulse transformer, and pulse voltage exports high-voltage pulse through the coupling of pulse voltage device; Now magnetic switch is in forward magnetic saturation state, and the pulse high-voltage that pulse transformer exports is limited by magnetic switch and makes it directly act on triggered gap;
Triggered gap punctures after pulse voltage is elevated to triggered gap breakdown voltage value, and bleeder resistance is shorted, and simultaneously magnetic switch is oppositely saturated gradually, after the discharge loop conducting of pulse current generating portion, storage capacitor through magnetic switch to triggered gap repid discharge.
Described after the discharge loop conducting of pulse current generating portion, storage capacitor continuous discharge, in triggered gap, arc discharge produces plasma.
Described when after controlled switch conducting, the first voltage pulse output of trigger, rear output pulse current; The time interval of the pulse voltage that trigger exports and pulse current is regulated by the volt-second characteristic adjusting magnetic switch; By the duration regulating current pulse width to carry out regulating impulse electric current, current pulse width realizes by regulating the capacitance of storage capacitor and the pulsactor of magnetic switch.
Described trigger is connected with trigger electrode or ground electrode by cable.
Described capacitance, for the protection of pulse current generating portion, avoids storage capacitor by pulse transformer secondary short circuit;
The pulse voltage that magnetic switch exports for the protection of pulse transformer secondary is not absorbed by pulse current generating portion, and avoids pulse voltage paired pulses current generation section to divide damaging.
Described bleeder resistance makes magnetic switch be in forward saturation condition before pulse voltage arrives, and to isolate the impact that pulse voltage paired pulses current generation section is divided, and limits the current potential of trigger electrode.
Compared with prior art, the present invention has following useful technique effect:
Trigger for triggering Trigatron gas switch provided by the invention, comprises the pulse high-voltage generating portion and pulse current generating portion that are in parallel; When after controlled switch conducting, the first voltage pulse output of trigger, rear output pulse current; Independently pulse current generating portion is added like this while guarantee pulse high-voltage exports, not only achieve load gap to the requirement of trigger in pulse voltage, and applicable electric current and energy can be provided according to the requirement of load, the continuous discharge electric discharge of pulse current generating portion, allow gap continue to produce plasma, be conducive to the control of Trigatron gas switch; Energy that pulse transformer provides can be reduced to improve the performance of pulse transformer simultaneously.
With use pulse transformer Trigatron gas switch triggered gap is punctured cause Trigatron gas switch closed compared with, trigger provided by the invention triggers Trigatron gas switch can provide enough energy for switch triggering gap discharge, Trigatron gas switch is easy to closed, operating voltage range increases, and functional reliability improves greatly.In simultaneously low pressure energy storage discharge loop, leak resistance is parallel to the current potential that triggered gap makes triggered gap puncture front trigger electrode and is clamped down on, and improves the job stability of Trigatron gas switch.
Trigger for triggering Trigatron gas switch provided by the invention, described trigger adopts capacitance and magnetic switch to be connected between pulse high-voltage part with pulse current generating portion.Capacitance is set and protects pulse current generating portion, avoid it to be shorted, ensure that trigger energy storage section can provide pulse current, and the operating voltage of capacitance high, be easy to obtain, the cost of igniter reduces, functional reliability improves;
Arrange the pulse voltage that magnetic switch protects output not absorbed by pulse current generating portion, the output having demonstrate,proved pulse high-voltage directly acts on triggered gap, and avoids pulse high-voltage paired pulses current generation section and divide and damage; Compared with use diode, the employing of capacitance and magnetic switch ensure that stability and the reliability of trigger.
Trigger for triggering Trigatron gas switch provided by the invention, first voltage pulse output during described flip-flop operation, rear output pulse current, namely pulse-triggered voltage first acts on the triggered gap of Trigatron gas switch, after triggered gap is punctured by pulse high-voltage, pulse current generating portion produces for its electric discharge and maintain plasma provides energy.In addition, the pulse voltage of trigger output and the time interval of pulse current can regulate by regulating the volt-second characteristic of magnetic switch; The duration of pulse current can be regulated by current pulse width, namely by the pulsactor adjustment width of capacitance and magnetic switch; The polarity of described trigger output voltage also can be changed by the output and DC power supply changing pulse transformer, to meet the requirement of load to trigger polarity.
Trigger for triggering Trigatron gas switch provided by the invention, Trigatron gas switch when can reliably puncture far below when self-breakdown voltage, height under-voltage than time the breakdown time delay of Trigatron gas switch and shake reduce.Compare traditional triggering mode, the operating voltage range of Trigatron gas switch increases, and the dispersiveness of discharge reliability and interspike intervals is all greatly improved.
Trigger for triggering Trigatron gas switch provided by the invention, by structural parameters and circuit parameter, the parameter of the output voltage polarity of such as trigger, pulse transformer parameter and pulse current generating portion, different trigger voltages and stored energy can be obtained, thus meet the different needs; Except Trigatron gas switch, trigger also can be applicable to spark gap and other needs to produce the field of high speed plasma.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention.
Embodiment
Below in conjunction with specific embodiment, the present invention is described in further detail, and the explanation of the invention is not limited.
See Fig. 1, a kind of trigger for triggering Trigatron gas switch, comprises the pulse high-voltage generating portion and pulse current generating portion that are in parallel;
Pulse high-voltage generating portion comprises and the pulsed capacitance in electric power generating composition loop and pulse transformer, 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 are also parallel with controlled switch, and the 3rd end of controlled switch is also connected with 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 (being connected load);
Pulse current generating portion 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 trigger electrode, between ground electrode and trigger electrode, be also parallel with bleeder resistance;
Gap between ground electrode and trigger electrode forms the triggered gap of Trigatron gas switch.
Concrete, one end of pulsed capacitance is connected with one end of controlled switch, and the other end of pulsed capacitance is connected to the one end on the former limit of pulse transformer, and the former other end on limit of pulse transformer is connected with the other end of controlled switch; The three-terminal link triggering signal generation device of controlled switch, controlled switch controls its break-make by triggering signal generation device.
Described pulse high-voltage generating portion is powered after filter protective circuit filtering by AC power; one end of filter protective circuit is connected with one 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 pulse transformer primary side.Wherein, high voltage silicon stack Main Function is rectification, and alternating current is converted to direct current; And protective resistance mainly plays metering function.
Further, in order to the reverse energy storage produced when overcoming impulse-capacitor discharge, between one end and ground of pulsed capacitance, be parallel with diode; Also be parallel with voltage-stabiliser tube at the two ends on the former limit of pulse transformer, prevent the overtension on the former limit of pulse transformer.
Be connected by capacitance and magnetic switch between pulse high-voltage part with pulse current generating portion; First voltage pulse output during flip-flop operation, rear output pulse current.
Controlled switch controls its break-make by Trig control signal, and when controlled switch is in the state of cut-offfing, pulse current generating portion is to storage capacitor DC charging;
When after controlled switch conducting, pulsed capacitance to the circuit loop electric discharge be made up of the former limit of pulse transformer and controlled switch, and forms pulse voltage on the former limit of pulse transformer, and pulse voltage exports high-voltage pulse through the coupling of pulse voltage device; Now magnetic switch is in forward magnetic saturation state, and the pulse high-voltage that pulse transformer exports is limited by magnetic switch and makes it directly act on triggered gap;
Triggered gap punctures after pulse voltage is elevated to triggered gap breakdown voltage value, and bleeder resistance is shorted, and simultaneously magnetic switch is oppositely saturated gradually, after the discharge loop conducting of pulse current generating portion, storage capacitor through magnetic switch to triggered gap repid discharge.
Provide a specific embodiment below:
Trigger body adopts 220V AC rectification to be pulse capacitor charging.Before not receiving triggering signal, controlled switch is in the state of cut-offfing, and pulse current generating portion makes DC power supply be in storage capacitor DC charging state due to the existence of capacitance.After triggering signal is applied to controlled switch, controlled switch conducting, the circuit discharging that pulsed capacitance is formed to the former limit of pulse transformer and controlled switch, and pulse voltage is formed on the former limit of pulse transformer.Pulse voltage is through the higher pulse voltage of the coupling output amplitude of pulse voltage device.Because magnetic switch is in forward magnetic saturation state, the pulse high-voltage that pulse transformer exports is limited by magnetic switch and makes it directly act on triggered gap.Triggered gap punctures after pulse voltage is elevated to certain value, and bleeder resistance is shorted, and low pressure storage capacitor is through magnetic switch repid discharge, and triggered gap arc discharge produces plasma.
Described after the discharge loop conducting of pulse current generating portion, storage capacitor continuous discharge, in triggered gap, arc discharge produces plasma.
And when after controlled switch conducting, the first voltage pulse output of trigger, rear output pulse current; The time interval of the pulse voltage that trigger exports and pulse current is regulated by the volt-second characteristic adjusting magnetic switch; By the duration regulating current pulse width to carry out regulating impulse electric current, current pulse width realizes by regulating the capacitance of storage capacitor and the pulsactor of magnetic switch.
Described trigger is connected with trigger electrode or ground electrode by cable, connects energy loss little by cable.
Described capacitance, for the protection of pulse current generating portion, avoids storage capacitor by pulse transformer secondary short circuit;
The pulse voltage that magnetic switch exports for the protection of pulse transformer secondary is not absorbed by pulse current generating portion, and avoids pulse voltage paired pulses current generation section to divide damaging.
Described bleeder resistance makes magnetic switch be in forward saturation condition before pulse voltage arrives, and to isolate the impact that pulse voltage paired pulses current generation section is divided, and limits the current potential of trigger electrode.
The parameter of the output voltage polarity of described trigger, pulse transformer parameter and pulse current generating portion all can regulate as required.
Adopt conventional pulse transformer to trigger main gap distance and be respectively 5mm, 8mm and 12mm, triggered gap distance is the Trigatron gas switch of 1.25mm, and the under-voltage ratio of minimum work of switch is about 40%.And adopt storage capacitor capacity to be 10 μ F, charging voltage is+1100kV, and pulse voltage is 15kV, and output polarity is that positive trigger is when triggering, Trigatron gas switch all can reliably conducting under the under-voltage ratio of 6%, and now switch shake also less.By test, demonstrate invention trigger there is good electric property, can reliably for Trigatron gas switch provides trigger voltage and trigger energy, and this trigger stability and reliability good, long service life.Described trigger suitably can adjust each component parameters as required to obtain required trigger voltage and trigger energy.
Provide the embodiment of some Parameters variation below.
Embodiment 1:
The present embodiment is a kind of trigger for Trigatron gas switch, and its discharge loop schematic diagram as shown in Figure 1.The low pressure storage capacitor capacity of pulse current generating portion is 10 μ F, and charging voltage is+1100kV; Described trigger exports positive pulse voltage and the pulse current of 15kV.When Trigatron gas switch triggered gap is 1.25mm, adopt this trigger to trigger, switch can under the under-voltage ratio of 6% reliably working.
Embodiment 2:
The present embodiment is a kind of trigger for Trigatron gas switch, and its discharge loop schematic diagram as shown in Figure 1.The low pressure storage capacitor capacity of pulse current generating portion is 10 μ F, and charging voltage is 800kV; Described trigger exports positive pulse voltage and the pulse current of 30kV.When Trigatron gas switch triggered gap is 1.25mm, adopt this trigger to trigger, switch can under the under-voltage ratio of 4% reliably working.
Embodiment 3:
The present embodiment is a kind of trigger for Trigatron gas switch, and its discharge loop schematic diagram as shown in Figure 1.The low pressure storage capacitor capacity of pulse current generating portion is 5 μ F, and charging voltage is-1100kV; Described trigger exports positive pulse voltage and the pulse current of-15kV.When Trigatron gas switch triggered gap is 1.25mm, adopt this trigger to trigger, switch can under the under-voltage ratio of 15% reliably working.
Claims (4)
1. for triggering a trigger for Trigatron gas switch, it is characterized in that, comprising the pulse high-voltage generating portion and pulse current generating portion that are in parallel;
Pulse high-voltage generating portion comprises and the pulsed capacitance in electric power generating composition loop and pulse transformer, 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 are also parallel with controlled switch, and the 3rd end of controlled switch is also connected with 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 portion 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 trigger electrode, between ground electrode and trigger electrode, be also parallel with bleeder resistance;
Gap between ground electrode and trigger electrode forms the triggered gap of Trigatron gas switch;
One end of pulsed capacitance is connected with one end of controlled switch, and the other end of pulsed capacitance is connected to the one end on the former limit of pulse transformer, and the former other end on limit of pulse transformer is connected with the other end of controlled switch; The three-terminal link triggering signal generation device of controlled switch, controlled switch controls its break-make by triggering signal generation device;
Described pulse high-voltage generating portion is powered after filter protective circuit filtering by AC power, one end of filter protective circuit is connected with one 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 pulse transformer primary side;
Diode is parallel with between one end and ground of pulsed capacitance; Also voltage-stabiliser tube is parallel with at the two ends on the former limit of pulse transformer;
Described trigger is connected with trigger electrode or ground electrode by cable;
Described capacitance, for the protection of pulse current generating portion, avoids storage capacitor by pulse transformer secondary short circuit;
The pulse voltage that magnetic switch exports for the protection of pulse transformer secondary is not absorbed by pulse current generating portion, and avoids pulse voltage paired pulses current generation section to divide damaging;
Described bleeder resistance makes magnetic switch be in forward saturation condition before pulse voltage arrives, and to isolate the impact that pulse voltage paired pulses current generation section is divided, and limits the current potential of trigger electrode.
2. as claimed in claim 1 for triggering the trigger of Trigatron gas switch, it is characterized in that, when controlled switch is in the state of cut-offfing, pulse current generating portion is to storage capacitor DC charging;
When after controlled switch conducting, pulsed capacitance to the circuit loop electric discharge be made up of the former limit of pulse transformer and controlled switch, and forms pulse voltage on the former limit of pulse transformer, and pulse voltage exports high-voltage pulse through the coupling of pulse voltage device; Now magnetic switch is in forward magnetic saturation state, and the pulse high-voltage that pulse transformer exports is limited by magnetic switch and makes it directly act on triggered gap;
Triggered gap punctures after pulse voltage is elevated to triggered gap breakdown voltage value, and bleeder resistance is shorted, simultaneously magnetic switch Direction saturation gradually, after the discharge loop conducting of pulse current generating portion, storage capacitor through magnetic switch to triggered gap repid discharge.
3. as claimed in claim 2 for triggering the trigger of Trigatron gas switch, it is characterized in that, described after the discharge loop conducting of pulse current generating portion, storage capacitor continuous discharge, in triggered gap, arc discharge produces plasma.
4., as claimed in claim 2 for triggering the trigger of Trigatron gas switch, it is characterized in that, when after controlled switch conducting, the first voltage pulse output of trigger, rear output pulse current; The time interval of the pulse voltage that trigger exports and pulse current is regulated by the volt-second characteristic adjusting magnetic switch; By the duration regulating current pulse width to carry out regulating impulse electric current, current pulse width realizes by regulating the capacitance of storage capacitor and the pulsactor of magnetic switch.
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