CN216013461U - Controlled trigger gas discharge switch and high-speed impact current generator applied by same - Google Patents
Controlled trigger gas discharge switch and high-speed impact current generator applied by same Download PDFInfo
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Abstract
The utility model discloses a controlled trigger gas discharge switch and high-speed impulse current generator who uses thereof, it includes the first gas discharge tube Q who establishes ties each otherAAnd a second gas discharge tube QBFirst gas discharge tube QAFirst electrode of and second gas discharge tube QBAre interconnected to form a switch trigger electrode G, a first gas discharge tube QAA second electrode of the second gas discharge tube is connected to the first electrode A of the discharge switchBSecond electrode of the discharge cell is connected to dischargeA second electrode B of the switch, a first voltage-sharing resistor R connected in parallel between the first electrode A of the discharge switch and the trigger electrode G of the switchAA second voltage-sharing resistor R is connected in parallel between the second electrode B of the discharge switch and the switch trigger electrode GB. The controlled trigger gas discharge switch based on the technical scheme provided by the invention can effectively solve the problem of obtaining high-speed impact current with adjustable current peak value, and can conveniently form a high-speed multi-channel impact current generator which is not needed at present based on the discharge switch.
Description
Technical Field
The utility model relates to a high-speed impact current acquisition device, more specifically the utility model relates to a controlled high-speed impact current generator who triggers gas discharge switch and use thereof.
Background
The research, development, production, detection and calibration of Rogowski coils and various high-frequency current sensors all need a high-frequency large-current impact current generator. For example: the rise time of a nanosecond pulse current source specified in a broadband Rogowski coil calibration specification 4.2.7 issued by JJF electron 0047 and 2020 in electronic measurement technical specification of Ministry of industry and communications is superior to 100NS, and the amplitude of the pulse current is 10-200A; the frequencies of traveling wave current sensors involved in rapidly evolving traveling wave measurement techniques for transmission line fault monitoring are even more of the order of several megabytes or even tens of megahertz.
The basic method for obtaining the impact current through the impact current generator is to set a proper resistor R and an inductor L in a discharge loop of an energy storage capacitor based on the waveform of the required impact current, charge the energy storage capacitor by using a charging power supply for energy storage, and then discharge the capacitor after energy storage through a discharge switch to obtain the impact current. At present, the impact current generator widely applied in the lightning protection field is mainly used for testing the performance of a lightning protection element SPD, a lightning current sensor, a lightning arrester and various lightning protection devices, the impact current generator generally uses a pneumatic device to drive a discharge ball to be used as a discharge switch to discharge an energy storage capacitor to obtain required impact current, and the impact current generator is suitable for specific waveforms such as 8/20,10/350 and the like. The frequency (or the rising speed of the leading edge) of the sensor can not meet the requirements of the high-frequency broadband current sensor on inspection and test at all.
The current semiconductor electronic switching elements such as a mode tube, an IGBT tube, a silicon controlled rectifier, a switching triode and the like have low working frequency or low switching current, and cannot meet the requirement of detecting the current switch of the high-speed impact current generator required by the high-frequency current sensor. In order to solve the above problem, patent application No. 202022648938.8, hereinafter referred to as "background art", proposes a technical solution for obtaining high-speed impact current by using a gas discharge tube as a discharge switch in a capacitive discharge circuit. By adopting the technical scheme, the rising speed of the impact current with the peak current up to hundreds of amperes can be expanded to nanosecond level.
As is common knowledge in the art, when the value R, L, C that determines the rising speed of the surge current in the discharge circuit is determined, the peak value of the discharge current depends on the discharge voltage of the energy storage capacitor, and the setting and adjusting of the peak value of the discharge current is the setting and adjusting of the discharge voltage of the energy storage capacitor. However, based on the technical solution provided by the background document, the discharge voltage of the capacitor is limited by the breakdown voltage of the gas discharge tube, and after the breakdown voltage of the gas discharge tube for the discharge switch is determined, the peak value of the discharge current corresponding to the discharge voltage of the energy storage capacitor is also determined, and to change the peak value of the impact current, the gas discharge tube with different breakdown voltages must be replaced; in addition, the actual breakdown voltages of the gas discharge tubes with the same nominal breakdown voltage have great dispersion, and the actual breakdown voltage of the same gas discharge tube is also related to the rising rate of the voltage loaded on the electrode of the gas discharge tube, which seriously affects the repeatability precision of the discharge voltage of the energy storage capacitor. In fact, as a surge current test apparatus, in most applications, it is required that the peak value of the surge current can be continuously finely adjusted within a certain range, and it is obvious that such a requirement cannot be satisfied if the peak value of the discharge current is determined by the breakdown voltage of the gas discharge tube. Therefore, the technical solutions provided in the background art documents will be greatly limited in practical applications, and further research and improvement on devices capable of adjusting high-speed impact current are necessary.
SUMMERY OF THE UTILITY MODEL
One of the objectives of the present invention is to provide a controlled trigger gas discharge switch and a high speed impulse current generator using the same, so as to solve the problem that the discharge voltage of the capacitor is limited by the breakdown voltage of the gas discharge tube in the prior art using the gas discharge tube as the discharge switch; to change the peak value of the impact current, gas discharge tubes with different breakdown voltages must be replaced, and the repeated precision of the discharge voltage of the energy storage capacitor is seriously influenced.
In order to solve the technical problem, the utility model adopts the following technical scheme:
an aspect of the present invention provides a controlled trigger gas discharge switch including a first gas discharge tube Q connected in seriesAAnd a second gas discharge tube QBSaid first gas discharge tube QAFirst electrode of and second gas discharge tube QBAre interconnected to form a switch trigger electrode G, said first gas discharge tube QAA second electrode of the second gas discharge tube Q is connected to the first electrode A of the discharge switchBThe second electrode of the discharge switch is connected with a second electrode B of the discharge switch, and a first voltage-sharing resistor R is connected in parallel between a first electrode A of the discharge switch and a switch trigger electrode GAA second voltage-sharing resistor R is connected in parallel between the second electrode B of the discharge switch and the switch trigger electrode GB。
Preferably, the further technical scheme is as follows: the first voltage-sharing resistor RAAnd a second voltage equalizing resistor RBIs equal to the breakdown voltage V between the first electrode a of the discharge switch and the trigger electrode G of the switchAAnd a breakdown voltage V between the second electrode B of the discharge switch and the trigger electrode G of the switchBThe ratio of.
The utility model discloses another aspect provides a controlled trigger gas discharge switch, gas discharge switch includes three electrode gas discharge tube, three electrode gas discharge tube's central electrode is switch trigger electrode G, just three electrode gas discharge tube's both ends electrode still inserts discharge switch first electrode A and discharge switch second electrode B respectively, be first gas discharge tube Q between switch trigger electrode G and the discharge switch first electrode AAA second gas discharge tube Q is arranged between the switch trigger electrode G and the second electrode B of the discharge switchB(ii) a The first gas discharge tube QAAnd a second gas discharge tube QBAre respectively connected in parallel with a first voltage-sharing resistor RAAnd a second voltage equalizing resistor RB. Controlled ignition gas consisting of three-electrode gas discharge tubesThe discharge switch is on the same principle as the gas discharge switch described above.
Similarly, the further technical scheme is as follows: the first voltage-sharing resistor RAAnd a second voltage equalizing resistor RBIs equal to the breakdown voltage V between the first electrode a of the discharge switch and the trigger electrode G of the switchAAnd the ratio of the breakdown voltage VB between the discharge switch second electrode B and the switch trigger electrode G.
When the gas discharge switch needs to be triggered to be conducted, firstly, the voltage V connected to the two ends of the energy storage capacitor C of the gas discharge switch is triggered to be conductedCIs charged to a voltage higher than the breakdown voltage V between the second electrode B of the discharge switch and the trigger electrode G of the switchBThen a peak voltage level higher than the breakdown voltage V between the first electrode A of the discharge switch and the switch trigger electrode G is loaded between the first electrode A of the discharge switch and the switch trigger electrode GAPulse trigger signal of (2) to make the first gas discharge tube QAIs broken down and conducted, so that the voltage V at the two ends of the energy storage capacitor C is enabledCTo the second gas discharge tube QBAt both ends of the second gas discharge tube QBQuilt VCBreakdown and conduction; turning on the controlled trigger gas discharge switch.
And the two-electrode gas discharge tube and the three-electrode gas discharge tube are combined to form a controlled-triggering gas discharge switch respectively. Specifically, when two gas discharge tubes Q are used to form a controlled-firing gas discharge switchAAnd QBConnected in series, QAAnd QBThe common connection point of one electrode of the discharge switch forms a trigger electrode G, Q of the discharge switchAThe other electrode of (2) constitutes discharge switch electrodes A, QBConstitutes a discharge switch electrode B. When a three-electrode gas discharge tube is used to form a controlled-trigger gas discharge switch, the center electrode of the three-electrode gas discharge tube forms a discharge switch trigger electrode G, and two electrodes at two ends of the three-electrode gas discharge tube respectively form a discharge switch electrode A and a discharge switch electrode B.
A voltage-sharing resistor R is connected in parallel between the electrode A and the electrode GAAt the electrode B and the electrodeG are connected with a voltage equalizing resistor R in parallelBSetting the breakdown voltage of a gas discharge tube located between the electrode A and the electrode G to VAThe breakdown voltage of the gas discharge tube between electrode B and electrode G is VBVoltage equalizing resistor RAAnd RBThe ratio of the resistance values of (A) to (B) is equal to the breakdown voltage V of the gas discharge tubeAAnd VBThe ratio of (A) to (B); connecting the gas discharge switch in series in the capacitor discharge circuit, and when the gas discharge switch is triggered to be switched on, making the peak level higher than VAThe trigger signal is loaded between an electrode A and an electrode G of the gas discharge switch, a gas discharge tube positioned between the electrode A and the electrode G is broken down and conducted by the trigger signal, and then, the voltage V at two ends of an energy storage capacitor CCApplied to both ends of the gas discharge vessel between electrode B and electrode G, if V is presentCHigher than VBThe gas discharge tube between electrode B and electrode G will be charged by a capacitive voltage VCThe breakdown is switched on, which finally results in the switching on of the discharge switch, whereby a controlled triggering of the discharge switch formed by the gas discharge tube is achieved.
The utility model also provides a high-speed impact current generator, the generator includes foretell controlled trigger gas discharge switch K, controlled trigger gas discharge switch K inserts the discharge circuit, still connect energy storage capacitor C in the discharge circuit, have equivalent resistance and equivalent inductance's discharge circuit electrode and conductor, the equivalent resistance of conductor and electrode is R, and equivalent inductance is L; the discharge loop conductor and the electrode are used for connecting the controlled trigger gas discharge switch K and the energy storage capacitor C in the discharge loop to form a closed discharge loop, and the discharge loop is also connected to the charging voltage monitoring and control module and the trigger circuit; the charging voltage monitoring and control module is connected with an energy storage capacitor C through voltage dividing resistors R1 and R2, and the output end of the trigger circuit is respectively connected with a switch trigger electrode G of a controlled trigger gas discharge switch K and a first electrode A of a discharge switch; voltage V across the energy storage capacitor CCProviding a sampling signal for monitoring the capacitor voltage to the charging voltage monitoring and control module after voltage division by the voltage dividing resistors R1 and R2, stopping charging when the voltage at the two ends of the energy storage capacitor C reaches a set voltage, and monitoring the voltage by the charging voltageThe measurement and control module sends a trigger instruction to the trigger circuit, and the trigger circuit sends a peak value level higher than the breakdown voltage V to the controlled trigger gas discharge switch K based on the instructionAThe pulse trigger signal of (2) turns on the controlled trigger gas discharge switch K, and then the energy stored in the energy storage capacitor C is discharged through the discharge loop.
Preferably, the further technical scheme is as follows: the charging voltage monitoring and control module is connected to the input end of a pulse transformer MB, and the positive output end of the pulse transformer MB is connected to the input end of a rectifier diode D; the output end of the rectifier diode D is respectively connected to the first charging normally-open contact cd1 of the charging switch Kcd and the first triggering normally-open contact cf1 of the triggering switch Kcf; the control electrodes of the charging switch and the trigger switch are connected to the charging-trigger function switching module; the second charging normally-open contact cd2 of the charging switch Kcd is connected with the first end of the energy storage capacitor C, and the first end of the energy storage capacitor C is also connected with the second electrode B of the discharging switch of the controlled trigger gas discharging switch K through a discharging loop electrode and a conductor; the second end of the energy storage capacitor C is connected with a first electrode A of a discharge switch of the controlled trigger gas discharge switch K, and the second end of the energy storage capacitor C is also connected with a system ground COM; a second trigger normally-open contact cf2 of the trigger switch Kcf is connected to a switch trigger electrode G of the controlled trigger gas discharge switch K; thereby realizing a single-channel high-speed impact current generator.
As mentioned above, the controlled trigger gas discharge switch K is connected in series in the discharge loop of the energy storage capacitor C, and the signal for charging the energy storage capacitor C and triggering the controlled trigger gas discharge switch K to conduct comes from the pulse signal output by the pulse transformer MB operating in the flyback mode; the positive output end of the MB is connected with the input end of the rectifier diode D, and the negative output end of the MB is connected with the system ground COM; the charging and triggering functions are switched with a charging switch Kcd and a triggering switch Kcf, respectively; the output end of the rectifier diode D is connected with the first normally-open contact cd1 of the charging switch Kcd and the first normally-open contact cf1 of the trigger switch Kcf; the second normally open contact cd2 of the charging switch Kcd is connected to the first end of the energy storage capacitor C, and meanwhile, since L and R in fig. 6 are symbols, not solid elements, used to represent the electrode and conductor equivalent inductance and equivalent resistance of the discharge circuit, the first end of the energy storage capacitor C connected to the second normally open contact cd2 of the charging switch is connected to the second electrode B of the controlled trigger gas discharge switch K through the discharge circuit conductor; the second end of the energy storage capacitor C is connected with the first electrode A of the controlled trigger gas discharge switch K through a discharge loop conductor; the second terminal of the energy storage capacitor C is also connected to the system ground COM.
During charging, the trigger switch Kcf is switched off, the charging switch Kcd is switched on, then a charging voltage monitoring and control module sends a pulse signal to the input end of a pulse transformer MB, and after the pulse signal is converted by the pulse transformer MB, the energy storage capacitor C is charged at the output end through a rectifier diode D and the charging switch Kcd; in the charging process, the charging voltage monitoring and control module monitors the voltage change of the energy storage capacitor C through the voltage dividing resistors R1 and R2, and when the voltage at the two ends of the energy storage capacitor C reaches a set value, the charging voltage monitoring and control module stops pulse transmission and shifts to a discharging stage. During discharging, the charging switch Kcd is turned off, the trigger switch Kcf is turned on, then the charging voltage monitoring and control module sends a corresponding pulse signal to the input end of the pulse transformer MB, the pulse signal is converted by the pulse transformer MB, and then the pulse signal is loaded to the switch trigger electrode G of the controlled trigger gas discharge switch K through the rectifier diode D and the trigger switch Kcf at the output end, so that the controlled trigger gas discharge switch K is turned on, and further, the energy stored in the energy storage capacitor C is discharged through the discharge loop.
The further technical scheme is as follows: the discharge loop is formed by connecting a plurality of discharge branches in parallel, and each discharge branch comprises an energy storage capacitor with different capacities, a controlled trigger gas discharge switch and a wave modulation inductor which are connected in series; the first end of the energy storage capacitor in each discharge branch is connected with the first electrode of a discharge switch of the controlled trigger gas discharge switch through a discharge loop conductor; the second end of each energy storage capacitor is connected with a second electrode of a discharge switch of the controlled trigger gas discharge switch through a wave modulation inductor of the discharge branch in which the energy storage capacitor is positioned; the second end of each energy storage capacitor is connected with a voltage division resistor and a charging switch through an isolation diode respectively, so that each energy storage capacitor is connected with a charging voltage monitoring and control module through the voltage division resistor and is connected with a rectifier diode through the charging switch, and each energy storage capacitor receives a charging signal from the positive output end of the pulse transformer; the switch trigger electrode of each controlled trigger gas discharge switch is connected with the respective gating trigger switch, and further connected with the rectifier diode through the gating trigger switch, so that the controlled trigger gas discharge switch receives a trigger signal from the positive output end of the pulse transformer.
The charging switch and all the gating trigger switches are connected to a charging-triggering function switching module, and the charging-triggering function switching module is also used for selecting a triggering channel of each discharging branch.
The charging voltage monitoring and control module is also connected to the input end of a pulse transformer, and the positive output end of the pulse transformer is connected to the input end of a rectifier diode; the output end of the rectifier diode is connected with the charging switch and all gating trigger switches; the charging voltage monitoring and control module is also connected with the charging-triggering function switching module. Thus, a multi-channel high-speed impact current generator is formed.
Furthermore, based on the structural description of the multi-channel high-speed impact current generator, N energy storage capacitors Cn are respectively connected in series with N wave-regulating inductors Ln and N controlled trigger gas discharge switches Kn in a mode of corresponding serial numbers to form N discharge branches; connecting N discharging branches in parallel and then connecting the N discharging branches into a closed discharging loop by using a conductor and an electrode to form an N-channel impact current generator; charging the energy storage capacitor Cn with a charging switch Kcd; the trigger signals trigger the controlled trigger gas discharge switch Kn through the gating trigger switch Kxtn in a mode corresponding to the serial numbers respectively; when the energy storage capacitor Cm of the mth channel needs to be discharged, the mth gating trigger switch Kxtm is controlled to be conducted by a program, a trigger signal is loaded to a trigger electrode G of the mth controlled trigger gas discharge switch Km, and the energy storage capacitor Cm is discharged after the Km is conducted to obtain the impulse current of the required rising edge; therefore, the N-channel surge current generator can provide surge currents with N different rising edges and adjustable peak currents.
The positive output end of the pulse transformer MB is connected with the input end of the rectifier diode D, and the negative output end of the pulse transformer MB is connected with the system ground COM; the output end of the rectifier diode D is connected with the first normally open contact cd1 of the charging switch Kcd and the first normally open contact xtn-1 of the gating trigger switch Kxtn; the second normally open contact cd2 of the charging switch Kcd is connected with the input end of the isolation diode Dn; the output ends of the isolation diodes Dn are respectively connected with the second end of the energy storage capacitor Cn and the first end of the corresponding wave-modulating inductor Ln in a mode of corresponding serial numbers; the second ends of all the energy storage capacitors Cn are connected with a system ground COM; the second ends of the wave-regulating inductors Ln are respectively connected with the electrodes B of the controlled trigger gas discharge switch Kn in a mode of corresponding serial numbers. Since L and R in fig. 7 are symbols, rather than physical elements, used to represent the equivalent inductance and equivalent resistance of the discharge circuit electrodes and conductors themselves, the electrodes a of the controlled trigger gas discharge switch Kn are actually connected to the second terminals of all the energy storage capacitors Cn through the discharge circuit conductors and electrodes, and the second terminals of all the energy storage capacitors are also connected to the system ground COM; the trigger electrodes G of the controlled trigger gas discharge switches Kn are respectively connected with the second normally open contact xtn-2 of the gate trigger switch Kxtn in a corresponding mode.
During charging, the gating trigger switch Kcfn is completely switched off, the charging switch Kcd is switched on, and the charging pulses charge Cn through Dn respectively; when the m channel is selected to discharge, the charging switch Kcd is turned off, the gating trigger switch Kxtm in the m channel is turned on, a trigger signal is loaded to a trigger electrode G of the controlled trigger gas discharge switch Km through Kxtm, and after the controlled trigger gas discharge switch Km is turned on, the energy storage capacitor Cm of the mth channel discharges.
Compared with the prior art, the beneficial effects of the utility model are one of following at least:
1. based on the utility model provides a controlled trigger gas discharge switch that technical scheme constitutes has solved the acquisition problem of the high-speed impulse current of current peak value adjustable effectively.
2. The high-speed multi-channel surge current transmitter which is not needed at present can be conveniently formed based on the discharge switch.
3. The controlled trigger gas discharge switch has the advantages of high speed, large through-flow capacity, convenience in use and the like, and is expected to be widely applied to the fields of high-frequency large-current signal sources, electromagnetic interference generators and the like.
Drawings
FIG. 1 is a prior art capacitive discharge circuit using a single gas discharge tube as a discharge switch.
Fig. 2 is a schematic diagram of a gas discharge switch for explaining the structure of a two-electrode gas discharge tube according to the present invention.
Fig. 3 is a schematic diagram of a gas discharge switch for explaining the structure of a three-electrode gas discharge tube according to the present invention.
Fig. 4 is an icon representing a controlled trigger discharge switch as defined by the present invention.
Fig. 5 is a circuit diagram for explaining the principle of controlled triggering of the discharge switch.
Fig. 6 is a schematic diagram illustrating a charging and triggering scheme of the surge current generator with adjustable peak current according to the present invention.
Fig. 7 is a schematic diagram illustrating the principle of the high-speed multi-channel impulse current generator with adjustable peak current according to the present invention.
Fig. 8 is a schematic circuit diagram for explaining the principles of embodiment 1 and embodiment 2 of the present invention.
Fig. 9 is a schematic circuit diagram for explaining the principle of embodiment 3 of the present invention.
Detailed Description
The gas discharge tube mentioned in this specification is a component connected in parallel to a line to be protected for protecting equipment connected to the line from overvoltage. When the line voltage is equal to the breakdown voltage of the gas discharge tube, the gas discharge tube is conducted, so that the line voltage is not higher than the breakdown voltage of the gas discharge tube. The voltage drop of the gas discharge tube after conduction is generally 20-50V, and the through-current capacity can reach more than thousands of amperes; different from various semiconductor switching elements at present, the frequency (or speed) of the impact current flowing through the gas discharge tube after conduction is not influenced by the gas discharge tube at all; when the switch is used as a discharge switch for obtaining the surge current, the conduction delay of the gas discharge tube has no negative influence on the high-speed surge current. The principle circuit for obtaining high-speed impact current by using a gas discharge tube as a discharge switch, which is provided by the background document and takes the test of a high-frequency current sensor as an example, is shown in fig. 1. In the figure, S0 and S1 are a standard current sensor and a measured current sensor, respectively, and when the charging circuit is started to charge the energy storage capacitor C during operation, after the capacitor voltage reaches the breakdown voltage of the gas discharge tube, the gas discharge tube serving as the discharge switch K is broken down and conducted, and the energy in the energy storage capacitor is discharged through the discharge circuit to provide a surge current to the standard current sensor S0 and the measured current sensor S1 so as to test the performance of the measured current sensor.
By adopting the principle circuit shown in fig. 1, the parameters of the energy storage capacitor C and the parameters of the loop resistance R and the loop inductance L including the conductor resistance and the conductor inductance in the capacitor discharge loop are properly configured, so that the impulse current with the fast rising speed in the nanosecond level and the current peak value up to the ampere or even thousands of amperes can be obtained, and the impulse current obtained by adopting any other electronic device to form the discharge switch cannot reach the technical index at present. However, when a single gas discharge tube is used as the discharge switch, the peak value of the rush current determined by the capacitor discharge voltage depends on the breakdown voltage of the gas discharge tube after the structural parameters of the discharge circuit are determined, and cannot be changed or adjusted by triggering control.
Since the purpose of the present invention is to solve the problem of controlled triggering of a gas discharge switch formed by a gas discharge tube, for convenience of description, "gas discharge switch" is also referred to as "discharge switch" for short in this specification, or "discharge switch" and "gas discharge switch" are equivalent when the description of the principles of the present application is concerned; compare in the direct mode of switching on by capacitor voltage puncture of discharge switch, the utility model discloses "controlled triggering" for discharge switch is defined to the mode that makes discharge switch on through trigger signal, is called "controlled triggering discharge switch" to the discharge switch that has controlled trigger function.
The present invention will be further explained with reference to the accompanying drawings.
As shown in fig. 2, the breakdown voltage is set to VAGas discharge tube QAAnd breakdownA voltage of VBGas discharge tube QBConnected in series, QAAnd QBThe common connection point of the first electrodes forms the trigger electrodes G, Q of the discharge switch KAThe second electrode of the controlled trigger discharge switch K forms the first electrode A, Q of the controlled trigger discharge switch KBThe second electrode of the controlled trigger discharge switch K forms a discharge switch second electrode B of the controlled trigger discharge switch K; after the discharge switch is connected to the discharge loop, the voltage at two ends of the gas discharge switch K is controlled to be triggered to be equal to the charging voltage Vc of the energy storage capacitor C in the charging process, so as to ensure that when the capacitor voltage Vc is less than VA+VBWhen the discharge is triggered, any one gas discharge tube in the discharge switch K is not directly broken down and conducted by Vc, and the ratio of the voltage of the capacitor Vc distributed to the two gas discharge tubes is ensured to be equal to VA/VBFor this purpose in the gas discharge tube QAAnd QBAre respectively connected with a voltage-sharing resistor R in parallelAAnd RBSo that the voltage equalizing resistor RAAnd RBThe ratio of the resistance values of (A) to (B) is equal to the breakdown voltage V of the gas discharge tubeAAnd VBAnd when the voltage equalizing resistor is connected with the signal trigger, the internal resistance of the signal trigger is far larger than the resistance value of the voltage equalizing resistor connected with the signal trigger in parallel.
Among the gas discharge tube family is a three-electrode gas discharge tube for protecting against double-line overvoltage to ground. On the internal structure, the three-electrode gas discharge tube is equivalent to the series connection of two gas discharge tubes with the same breakdown voltage and communicated gas paths; when the three-electrode gas discharge tube is used as a protection element, the center electrode of the three-electrode gas discharge tube is grounded, the two end electrodes are respectively connected with the two protected circuits, when overvoltage signals higher than breakdown voltage of the gas discharge tube appear on the two protected circuits, the two gas discharge tubes are simultaneously conducted to clamp the overvoltage of the circuits to the ground, and the clamping current flows into the ground through the center electrode.
According to the controlled triggering principle and the triggering wiring mode of the gas discharge switch provided by the utility model, after the voltage-sharing treatment is carried out on two gas discharge tubes in the three-electrode gas discharge tube, one three-electrode gas discharge tube can also conveniently form a controlled triggering gas discharge switch; in a three-electrode gas dischargeOn the basis of the structure and the manufacturing process of the tube, based on the utility model discloses the controlled trigger voltage adjustment range and the V that deriveAAnd VBThe relationship of (1) reasonably configuring the breakdown voltage of the central electrode to the two end electrodes, optimizing the gas circuit structure and the structure of the central electrode, and possibly providing an integrated gas discharge switch which has excellent performance, wider voltage adjustment range and can be triggered in a controlled manner.
As shown in fig. 3, the center electrode of the three-electrode controlled-trigger gas discharge switch (including the gas discharge switch formed by the existing three-electrode gas discharge tube and the dedicated integrated gas discharge switch manufactured based on the principles of the present application) is the discharge switch trigger electrode G, one of the two end electrodes forms the discharge switch first electrode a, and the other forms the discharge switch second electrode B. Similar to a gas discharge switch constructed with a two-electrode gas discharge tube, the gas discharge tube located between electrodes A, G is defined as QAAnd the gas discharge tube between electrodes B, G is QBIn a gas discharge tube QAAnd QBAre respectively connected with a voltage-sharing resistor R in parallelAAnd RBSo that the voltage equalizing resistor RAAnd RBThe ratio of the resistance values of (A) to (B) is equal to the breakdown voltage V of the gas discharge tubeAAnd VBThe ratio of (A) to (B); when manufacturing the special integrated discharge switch, V can be selected according to the principle given later in the applicationA=2VB(ii) a When the discharge switch is connected with the signal trigger, in order to ensure that the voltage-sharing condition is not damaged, the internal resistance of the signal trigger is far larger than the resistance value of the voltage-sharing resistor RA connected in parallel with the signal trigger.
The present application uses the symbols shown in fig. 4 to represent the gas discharge switches shown in fig. 2 and 3; a in the discharge switch iconQRIndicating gas discharge tube QAAnd voltage-sharing resistor RAParallel connection of (B)QRIndicating gas discharge tube QBAnd voltage-sharing resistor RBAre connected in parallel.
The principle circuit shown in fig. 5 is used to explain the controlled triggering mechanism of the discharge switch provided in the present application and the principle of using the controlled triggering discharge switch to form a high-speed rush current generator with adjustable peak current.
Gas dischargeControlled triggering mechanism of the switch: electrode a and electrode B of controlled trigger gas discharge switch K are connected in series to the discharge circuit shown in fig. 5, and electrode G and electrode a are connected to the trigger circuit. When the capacitor voltage VC＜VA+VBAnd when the trigger circuit does not send a trigger signal, the capacitor voltage cannot cause any gas discharge tube in the controlled trigger gas discharge switch K to be broken down and conducted, so that the discharge switch cannot be conducted. When the trigger circuit sends a peak level higher than V to the discharge switchAPulse signal (hereinafter referred to as "trigger signal"), gas discharge tube QAWill be broken down and conducted by the trigger signal when the gas discharge tube QAAfter conduction, the capacitor voltage VCTo be applied to a gas discharge tube QBIf the capacitor voltage V is present at this timeC≥VBThen gas discharge tube QBTo be VCThe breakdown is switched on, which finally results in a complete conduction of the controlled-triggering gas discharge switch K, which effects a controlled triggering of the gas discharge switch formed by the gas discharge tube.
Relationship between controlled ignition range and breakdown voltage of gas discharge tube: if the highest charging voltage of the energy storage capacitor which does not cause the controlled trigger gas discharge switch K to be directly broken down and conducted is Vmax and the lowest charging voltage which can ensure the controlled trigger gas discharge switch K to be reliably triggered is Vmin, the Vmax and Vmin of the controlled trigger interval of the controlled trigger gas discharge switch K and the breakdown voltages V of the two gas discharge tubes are determinedAAnd VBThe relationship between them should be satisfied.
1. Vmax＜VA+VB(otherwise, the controlled trigger gas discharge switch K would be turned on directly by the capacitor voltage breakdown).
2. Vmin≥VB(otherwise, gas discharge tube QBWill not be broken down to conduct and the controlled trigger gas discharge switch K will not be controlled to trigger).
3. Vmin+VB≥VA(otherwise, gas discharge tube QBWill precede QAIs broken down and conducted by a trigger signal, and the gas discharge tube QBAfter conduction, the trigger signal is clamped to be lower than VACapacitor voltage of, first gasThe discharge tube cannot be broken down to conduct and the controlled trigger gas discharge switch K cannot be controlled to trigger).
Get VA=NVBThe above three restrictions are rewritten as follows.
Vmax＜（N+1）VB ……（1）
Vmin≥VB ……（2）
Vmin≥（N-1）VB ……（3）
Obviously, Vmin should take the larger of the two vmins determined by formula (2) and formula (3), respectively; due to VAMust be greater than VBTherefore, N must be greater than 1. Obviously, the adjustable range (Vmax-Vmin)/Vmax of the capacitor voltage which is triggered in a controlled manner and expressed by percentage can be ensured to be related to the value of N; it can be easily derived that when N =2, the adjustment range of the capacitor voltage which can be triggered by the discharge switch in a controlled manner is ensured to reach a maximum value of 67% (note: the residual voltage after the gas discharge tube is conducted is not considered in the above analysis). Because the gas paths of the two gas discharge tubes in the existing three-electrode gas discharge tube are communicated, when Q isAWill lower Q when conductingBThe voltage regulation range of the existing three-electrode gas discharge tube used as the controlled trigger discharge switch is larger than 50%.
Since the peak value of the rush current is determined by the discharge voltage of the energy storage capacitor, V is usedA=2VBThe adjustable range of the peak current of the discharge circuit of the discharge switch formed by the gas discharge tubes can reach 67 percent.
The principle of forming a surge current generator with adjustable peak current by using a controlled trigger discharge switch is as follows: in the principle circuit shown in fig. 5, L and R are symbols, not physical elements, used to indicate all conductors and electrodes carrying discharge current, and their own equivalent inductances and their own equivalent resistances, which constitute a discharge circuit, so that the elements connected to L or R in the figure are actually connected to the corresponding conductors or electrodes (the same applies hereinafter).
After the parameters of the discharge switch and the circuit structure are determined, Vmin and Vmax of the lowest and highest capacitor charging voltages which can be controlled and triggered are also determined. In thatSetting the charging voltage Vc of the energy storage capacitor between Vmin and Vmax based on the required peak current, and starting charging the energy storage capacitor C; the capacitor voltage Vc is divided by the R1 and the R2 and then provides a sampling signal for monitoring the capacitor voltage to the charging voltage monitoring and control module, when the voltage at the two ends of the energy storage capacitor is charged to a set voltage, the charging is stopped, the charging voltage monitoring and control module sends a trigger instruction to the trigger circuit, and the trigger circuit sends a peak value level higher than V to the controlled trigger gas discharge switch K based on the instructionAThe pulse signal triggers the controlled trigger gas discharge switch K to be conducted, after the controlled trigger gas discharge switch K is conducted, the energy stored in the energy storage capacitor is discharged through the discharge loop, and Vc is adjusted between Vmin and Vmax, so that the peak value of the impact current can be changed. In the figure'
"while the discharge current path is illustrated, the composition of the closed discharge circuit is also shown (the same below).
In the high-speed rush current generator principle circuit with adjustable current peak value, shown in fig. 6, using controlled firing of the discharge switch, a preferred but not exclusive charging and firing circuit configuration is given. The signal for charging the energy storage capacitor C and triggering the discharge switch K to be conducted comes from a pulse signal output by a pulse transformer MB working in a flyback mode; the output end of the plus of the pulse transformer MB is connected with the input end of the rectifier diode D, and the output end of the minus is connected with the system ground COM; the charging and triggering functions are switched by a charging switch Kcd and a triggering switch Kcf controlled by a charging-triggering function switching module; the output end of the rectifier diode D is connected with the first normally-open contact cd1 of the charging switch Kcd and the first normally-open contact cf1 of the trigger switch Kcf; the first end of the energy storage capacitor C connected with the second normally-open contact cd2 of the charging switch Kcd is connected to the second electrode B of the discharging switch K through a discharging loop conductor; the second terminal of the energy storage capacitor C, which is connected via the discharge circuit conductor to the first electrode a of the controlled trigger gas discharge switch K, is simultaneously connected to the system ground COM.
During charging, the system firstly switches off the trigger switch Kcf through the charging-trigger function switching module and switches on the charging switch Kcd, then sends continuous pulse signals to the input end of the pulse transformer MB in a PWM mode through the charging voltage monitoring and control module, and the pulse signals are converted by the pulse transformer MB and then charge the energy storage capacitor C through the rectifier diode D and the charging switch Kcd at the output end; in the charging process, the system monitors the change of the voltage Vc of the energy storage capacitor through the charging voltage monitoring and control module and the divider resistors R1 and R2, when the Vc is charged to a set value, the charging voltage monitoring and control module stops pulse transmission, and the system shifts to a discharging stage;
during discharging, the system firstly cuts off the charging switch Kcd through the charging-triggering function switching module and turns on the triggering switch Kcf, then sends a pulse signal with the width corresponding to the expected output level to the input end of the pulse transformer through the charging voltage monitoring and controlling module (after the circuit parameters are determined, the peak value of the output pulse signal is related to the width of the input pulse signal), the triggering signal converted by the pulse transformer MB is added to the triggering electrode G of the discharging switch K through the rectifier diode D and the triggering switch Kcf to turn on the discharging switch K, and the energy stored in the energy storage capacitor C is discharged through the discharging loop.
Besides the requirement of voltage resistance, the switch speed and the switch current of the charging switch and the discharging switch are not required, and all switches which have the voltage resistance meeting the requirement and can be switched on and off by program control can be used as the charging switch and the trigger switch.
In many applications, it is desirable that the same device provide high-speed inrush current of many different frequencies (or rising edges) and with adjustable current peaks. The multi-channel impulse current generator formed by the principle circuit shown in fig. 7 can provide N kinds of impulse currents with different rising edges and adjustable peak current on the same equipment.
Description of the drawings:
1. the subscript N (N =1, 2, … …, N) denotes the number N of like elements, and m (1. ltoreq. m.ltoreq.N) denotes the mth element of the number N of like elements, for example: cn represents N total energy storage capacitors, Cm represents the mth energy storage capacitor, Kn represents N total discharge switches, Km represents the mth discharge switch … …;
2. "connecting … … in correspondence with the reference numerals" means that the corresponding electrodes of different elements having the same reference numeral n are connected;
cd1 and cd2 represent the first and second normally open contacts, respectively, of the charge switch Kcd; xtn-1 and xtn-2 respectively represent the first and second normally open contacts of the strobe trigger switch Kxtn in a manner corresponding to the serial numbers;
4. in the multi-channel rush current generator, only one of N discharge switches Kn is triggered to be turned on at a time of discharge, and N trigger switches that trigger the N discharge switches Kn to be turned on in a manner corresponding to the serial number are defined as "gate trigger switches" denoted by Kxtn (N =1, 2, … …, N).
Basic structure and principle: n energy storage capacitors Cn are respectively connected with N wave modulation inductors Ln and N gas discharge switches Kn in series in a mode of corresponding serial numbers to form N discharge branches; connecting N discharging branches in parallel and then connecting conductors and electrodes which are shared by the branches and used for bearing discharging current of the branches into a closed loop to form an N-channel impact current generator; the charging pulse signal output by the pulse transformer MB charges the energy storage capacitor Cn through the rectifier diode D and the charging switch Kcd; a trigger pulse signal output by the pulse transformer MB triggers a discharge switch Kn through a rectifier diode D and n gating trigger switches Kxtn in a mode of corresponding sequence numbers; the charging switch and the gating trigger switch are controlled by the charging-triggering function switching module, when the energy storage capacitor Cm of the mth channel needs to be discharged, the charging-triggering function switching module controls the conduction of the mth gating trigger switch Kxtm, so that a triggering signal is loaded to a triggering electrode G of the mth discharging switch Km, and the energy storage capacitor Cm is discharged after the conduction of Km to obtain the impulse current of the required rising edge; therefore, the N-channel surge current generator can provide surge currents with N different rising edges and adjustable peak currents.
In the single-channel discharge circuit, the required rising edge of the impulse current can be obtained by setting the shapes, lengths and sectional areas of the conductors and/or electrodes of the discharge circuit and matching the circuit equivalent resistance R and the equivalent inductance L with the nominal value of the energy storage capacitor, and at this time, it is not necessary to additionally add a wave-modulating inductance in the discharge circuit (as in embodiments 1 and 2). In the multi-channel impulse current generator, the fixed loop equivalent inductance L and the equivalent resistance R cannot be matched with the energy storage capacitor with the nominal capacity in each channel to meet the rising edge of the impulse current meeting the design requirement. In fig. 8, when the energy storage capacitor Cm with proper nominal capacity is not selected in the mth branch to make the rising edge of the surge current meet the design requirement, the rising edge of the surge current of the branch meets the design requirement by adding the wave-regulating inductor Lm in the branch; if a capacitor Cm with a suitable nominal capacity is directly matched to the loop equivalent resistance R and the equivalent inductance L to a satisfactory rising edge, the inductance Lm can be cancelled, or Lm =0.
The connection mode and the working principle of the circuit are as follows: the output end of the plus of the pulse transformer MB is connected with the input end of the rectifier diode D, and the output end of the minus of the pulse transformer MB is connected with the system ground COM; the output end of the rectifier diode D is connected with the first normally open contact cd1 of the charging switch Kcd and the first normally open contacts xtn-1 of all the gating trigger switches Kxtn; the second normally open contact cd2 of the charging switch Kcd is connected with the input end of the isolation diode Dn; the output ends of the isolation diodes Dn are respectively connected with the second end of the energy storage capacitor Cn and the first end of the corresponding wave-modulating inductor Ln in a mode of corresponding serial numbers; the second ends of the wave-regulating inductors Ln are respectively connected with the second electrodes B of the discharge switches Kn in a mode of corresponding serial numbers; since L and R are symbols, rather than physical elements, used to represent the discharge circuit electrodes and the equivalent inductance and equivalent resistance of the conductors themselves, the first electrodes a of all the discharge switches Kn are actually connected to the first ends of all the energy storage capacitors Cn through the discharge circuit conductors and/or electrodes, and the first ends of the energy storage capacitors Cn are also connected to the system ground COM; the trigger electrodes G of the discharge switches Kn are connected to the second normally open contacts xtn-2 of the strobe trigger switches Kxtn in a manner corresponding to the serial numbers.
Example 1
The schematic circuit diagram of embodiment 1 is shown in fig. 8. The output end of the plus of the pulse transformer MB is connected with the input end of the rectifier diode D, and the output end of the minus is connected with the system ground COM; the output end of the rectifier diode D is connected with the first normally-open contact cd1 of the charging relay Kcd and the first normally-open contact cf1 of the trigger relay Kcf; the first end of the energy storage capacitor C connected with the second normally open contact cd2 of the charging relay Kcd is simultaneously connected with the first electrode 1-1 of the detachable discharging rod 1 through a conductor; the second electrode 1-2 of the discharge rod 1 is connected with the electrode B of the discharge switch through a conductor; the discharge rod 1 can be conveniently connected into or disconnected from a discharge circuit through the electrodes 1-1 and 1-2 so as to penetrate through the standard current sensor S0 and the tested current sensor S1 and provide test currents for S0 and S1; and an electrode A of the discharge switch K is connected with the second end of the energy storage capacitor C, and a connection point of the electrode A of the discharge switch K and the energy storage capacitor C is simultaneously connected with a system ground COM.
The pulse transformer of example 1 employs an EE35 magnetic core with a primary to secondary turn ratio of 1: 15; the rectifier diode D is a high-voltage fast recovery diode with the model number of CL03-08, the current is 400mA, the withstand voltage is 8000V, and the recovery time is 100 NS; the types of the gas discharge tubes forming the discharge switch are EPCOS, QABreakdown voltage V ofA = 1200V，QBBreakdown voltage V ofB = 600V; voltage equalizing resistance RA =2M, RB = 1M; the model of the two relays for switching the charging and triggering functions is HVR1A24, and the contact current 1A and the withstand voltage after the contact is disconnected are 4000V; the energy storage capacitor C is a resonance capacitor with the capacity of 1000P and the withstand voltage of 2000V; the total length of the conductor of the discharge circuit (including the electrode, the circuit conductor and the discharge rod) is 330mm, and the average conductor sectional area is 10 square millimeters.
Based on the circuit structure and circuit parameters of embodiment 1, a surge current with a rising edge of 20nS and a peak current range of 20A-60A can be obtained.
Example 2
Except for the difference in circuit parameters, the principle circuit of embodiment 2 is exactly the same as that of embodiment 1, as shown in fig. 8. The model of the three-electrode gas discharge tube is EPCOS, and the breakdown voltage of the two end electrodes to the central electrode is 800V; voltage equalizing resistance RA = RB = 2M; the capacity of the energy storage capacitor is 0.025uF, and the withstand voltage is 1500V; the circuit parameters of the rest part are exactly the same as those of embodiment 1.
Based on the circuit structure and circuit parameters of embodiment 2, a rush current with a rising edge of 100NS and a peak current in the range of 75A-150A can be obtained.
Example 3
Embodiment 3 is a 3-channel high-speed surge current generator constructed based on the principle of the aforementioned multi-channel high-speed surge current generator, and the principle circuit thereof is shown in fig. 9.
In the embodiment 3, the discharge branch 1 is formed by connecting C1, L1 and K1 in series; c2, L2 and K2 are connected in series to form a discharge branch 2; c3, L3 and K3 are connected in series to form a discharge branch 3; the 3 branches are connected in parallel and then connected with the detachable discharging rod 1 by a conductor to form a closed multi-channel discharging circuit.
The output end of the plus of the pulse transformer MB is connected with the input end of the rectifier diode D, and the output end of the minus is connected with the system ground COM; the output end of the rectifier diode D is connected with a first normally open contact cd1 of the charging relay Kcd and first normally open contacts xt1-1, xt2-1 and xt3-1 of 3 gating trigger relays; the second normally open contact cd2 of the charging relay Kcd is connected with the input ends of the isolation diodes D1, D2 and D3; the output end of the isolation diode D1 is connected with the first ends of the energy storage capacitor C1 and the wave modulation inductor L1, the output end of the D2 is connected with the first ends of the energy storage capacitor C2 and the wave modulation inductor L2, and the output end of the D3 is connected with the first ends of the energy storage capacitor C3 and the wave modulation inductor L3; second ends of the energy storage capacitors C1, C2 and C3 are connected together and then connected with the electrodes 1-2 of the detachable discharging rod 1 and the system ground COM; the other ends of the wave-modulating inductors L1, L2 and L3 are respectively connected with the electrodes B of the discharge switches K1, K2 and K3 in a mode of corresponding serial numbers; the electrodes A of 3 discharge switches K1, K2 and K3 are connected together and then connected with the electrode 1-1 of the detachable discharge rod 1; the trigger electrodes G of the discharge switches K1, K2 and K3 are respectively connected with second normally open contacts xt1-2, xt2-2 and xt3-2 of gating trigger relays Kxt1, Kxt2 and Kxt3 in a mode of corresponding serial numbers,
the main component parameters of example 3 are: the pulse transformer adopts an EE35 magnetic core, and the turn ratio of the primary winding to the secondary winding is 1: 15; the isolation diodes D, D1, D2 and D3 are high-voltage fast recovery diodes with the model number of CL03-08, the current is 400mA, the withstand voltage is 8000V, and the recovery time is 100 NS; the charging relay CD, the triggering relay CF and the channel selection relays J1, J2 and J3 are all in HVR1A24 type, and the contact current 1A and the withstand voltage after the contact is disconnected are 4000V; energy storage capacitance C1=1000P, C2=0.025uF, C3=0.22 uF.
The rising edge and peak value adjusting range of each channel impulse current are respectively.
A channel: the rising edge is 20 NS; the peak current adjustment range is 20A-60A.
Two channels: the rising edge is 100 NS; the peak current adjustment range is 50A-150A.
Three channels: the rising edge is 300 NS; the peak current adjustment range is 300A-900A.
In addition to the foregoing, it should be noted that reference throughout this specification to "one embodiment," "another embodiment," "an embodiment," or the like, means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment described generally throughout this application. The appearances of the same phrase in various places in the specification are not necessarily all referring to the same embodiment. Further, when a particular feature, structure, or characteristic is described in connection with any embodiment, it is submitted that it is within the scope of the invention to effect such feature, structure, or characteristic in connection with other embodiments.
Although the invention has been described herein with reference to a number of illustrative embodiments thereof, it should be understood that numerous other modifications and embodiments can be devised by those skilled in the art that will fall within the spirit and scope of the principles of this invention. More specifically, various variations and modifications are possible in the component parts and/or arrangements of the subject combination arrangement within the scope of the disclosure, the drawings and the appended claims. In addition to variations and modifications in the component parts and/or arrangements, other uses will also be apparent to those skilled in the art.
Claims (8)
1. A controlled trigger gas discharge switch characterized by: the gas discharge switch comprises first gas discharge tubes (Q) connected in seriesA) And a second gas discharge tube (Q)B) Said first gas discharge tube (Q)A) First electrode and second gas discharge tube (Q)B) Are interconnected to form a switch trigger electrode (G)Said first gas discharge tube (Q)A) Into the first electrode (A) of the discharge switch, said second gas discharge tube (Q)B) The second electrode of the discharge switch is connected with a second electrode (B) of the discharge switch, and a first voltage-sharing resistor (R) is connected in parallel between the first electrode (A) of the discharge switch and a switch trigger electrode (G)A) A second voltage-sharing resistor (R) is connected in parallel between the second electrode (B) of the discharge switch and the switch trigger electrode (G)B）。
2. The controlled trigger gas discharge switch of claim 1, wherein: the first voltage equalizing resistor (R)A) And a second voltage equalizing resistor (R)B) Is equal to the breakdown voltage (V) between the first electrode (A) of the discharge switch and the trigger electrode (G) of the switchA) And a breakdown voltage (V) between the second electrode (B) of the discharge switch and the trigger electrode (G) of the switchB) The ratio of.
3. A controlled trigger gas discharge switch characterized by: the gas discharge switch comprises a three-electrode gas discharge tube, the center electrode of the three-electrode gas discharge tube is a switch trigger electrode (G), two end electrodes of the three-electrode gas discharge tube are respectively connected to a first electrode (A) of the discharge switch and a second electrode (B) of the discharge switch, and a first gas discharge tube (Q) is arranged between the switch trigger electrode (G) and the first electrode (A) of the discharge switchA) A second gas discharge tube (Q) is arranged between the switch trigger electrode (G) and the second electrode (B) of the discharge switchB) (ii) a The first gas discharge tube (Q)A) And a second gas discharge tube (Q)B) Are respectively connected in parallel with a first voltage-sharing resistor (R)A) And a second voltage equalizing resistor (R)B）。
4. The controlled trigger gas discharge switch of claim 3, wherein: the first voltage equalizing resistor (R)A) And a second voltage equalizing resistor (R)B) The ratio of the resistance values therebetween is,equal to the breakdown voltage (V) between the first electrode (A) of the discharge switch and the trigger electrode (G) of the switchA) And a breakdown voltage (V) between the second electrode (B) of the discharge switch and the trigger electrode (G) of the switchB) The ratio of.
5. A high speed surge current generator characterized by: the generator comprises a controlled trigger gas discharge switch (K) as claimed in any one of claims 1 to 4, the controlled trigger gas discharge switch (K) is connected into a discharge loop, an energy storage capacitor (C) is also connected in series in the discharge loop, and the energy storage capacitor (C) is connected with the controlled trigger gas discharge switch (K) through a discharge loop conductor to form a closed discharge loop;
the discharging loop is also connected with a charging voltage monitoring and controlling module and a trigger circuit; the charging voltage monitoring and control module is connected with an energy storage capacitor (C) through voltage division resistors (R1, R2), and the output end of the trigger circuit is respectively connected with a switch trigger electrode (G) of a controlled trigger gas discharge switch (K) and a first electrode (A) of a discharge switch;
the voltage (V) across the energy storage capacitor (C)C) Providing a sampling signal for monitoring capacitor voltage to the charging voltage monitoring and control module after voltage division by the voltage dividing resistors (R1, R2), stopping charging when the voltage at two ends of the energy storage capacitor (C) reaches a set voltage, sending a trigger instruction to the trigger circuit by the charging voltage monitoring and control module, and sending a peak value level higher than breakdown voltage (V) to the controlled trigger gas discharge switch (K) by the trigger circuit based on the instructionA) The pulse trigger signal of (a) to turn on the controlled trigger gas discharge switch (K).
6. The high-speed rush current generator according to claim 5, wherein: the charging voltage monitoring and control module is also connected to the input end of a pulse transformer (MB), and the positive output end of the pulse transformer (MB) is connected to the input end of a rectifier diode (D); the output end of the rectifier diode (D) is respectively connected to a first charging normally open contact (cd 1) of the charging switch (Kcd) and a first triggering normally open contact (cf 1) of the triggering switch (Kcf); the control electrodes of the charging switch (Kcd) and the trigger switch (Kcf) are connected to a charging-trigger function switching module; a second charging normally open contact (cd 2) of the charging switch (Kcd) is connected with a first end of an energy storage capacitor (C), and the first end of the energy storage capacitor (C) is also connected with a second electrode (B) of a discharging switch of the controlled trigger gas discharging switch (K); the second end of the energy storage capacitor (C) is connected with a first electrode (A) of a discharge switch of the controlled trigger gas discharge switch (K); a second trigger normally open contact (cf 2) of the trigger switch (Kcf) is connected with a switch trigger electrode (G) of the controlled trigger gas discharge switch (K).
7. The high-speed rush current generator according to claim 6, wherein: the discharge loop comprises a plurality of discharge branches which are connected in parallel, and each discharge branch comprises an energy storage capacitor, a controlled trigger gas discharge switch and a wave modulation inductor which are connected in series;
the first end of the energy storage capacitor in each discharge branch is connected with the first electrode of a discharge switch of the controlled trigger gas discharge switch; the second end of each energy storage capacitor is connected with the second electrode of the discharge switch of the controlled trigger gas discharge switch through the wave modulation inductor of the discharge branch;
the second end of each energy storage capacitor is respectively connected with a voltage dividing resistor and a charging switch through respective isolation diodes, so that each energy storage capacitor is connected with a charging voltage monitoring and control module through the voltage dividing resistor and is connected with a rectifier diode through the charging switch, and each energy storage capacitor receives a charging signal from the positive output end of the pulse transformer;
the switch trigger electrode of each controlled trigger gas discharge switch is connected with the trigger switch, and further connected with the rectifier diode through the trigger switch, so that the controlled trigger gas discharge switch receives a trigger signal from the positive output end of the pulse transformer; the trigger switches are all gating trigger switches.
8. The high-speed rush current generator according to claim 7, wherein: the control electrodes of the charging switch and all the gating trigger switches are connected to a charging-triggering function switching module, and the charging-triggering function switching module is also used for selecting a triggering channel of each discharging branch;
the charging voltage monitoring and control module is also connected to the input end of a pulse transformer, and the positive output end of the pulse transformer is connected to the input end of a rectifier diode; the output end of the rectifier diode is connected with the charging switch and all gating trigger switches; the charging voltage monitoring and control module is also connected with the charging-triggering function switching module.
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Cited By (2)
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| CN113740573A (en) * | 2021-09-03 | 2021-12-03 | 成都知力电子有限责任公司 | Controlled trigger gas discharge switch and high-speed impact current generator applied by same |
| CN115549651A (en) * | 2022-11-26 | 2022-12-30 | 昆明理工大学 | Impulse current generator for simulating multiple lightning strokes |
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2021
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113740573A (en) * | 2021-09-03 | 2021-12-03 | 成都知力电子有限责任公司 | Controlled trigger gas discharge switch and high-speed impact current generator applied by same |
| CN115549651A (en) * | 2022-11-26 | 2022-12-30 | 昆明理工大学 | Impulse current generator for simulating multiple lightning strokes |
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Effective date of registration: 20240923 Address after: 201100 room 1001, 1st floor, building B, 555 Dongchuan Road, Minhang District, Shanghai Patentee after: SHANGHAI PINYAN MANDC TECHNOLOGY Co.,Ltd. Country or region after: China Address before: 105, building 2, Chengdu Branch, Chinese Academy of Sciences, No. 9, section 4, Renmin South Road, Wuhou District, Chengdu, Sichuan 610000 Patentee before: CHENGDU ZHILI ELECTRONIC CO.,LTD. Country or region before: China |