CN102916680B - A kind of multiplication of voltage square-wave generator of the repetition rate based on magnetic switch - Google Patents
A kind of multiplication of voltage square-wave generator of the repetition rate based on magnetic switch Download PDFInfo
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- CN102916680B CN102916680B CN201210382916.9A CN201210382916A CN102916680B CN 102916680 B CN102916680 B CN 102916680B CN 201210382916 A CN201210382916 A CN 201210382916A CN 102916680 B CN102916680 B CN 102916680B
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Abstract
The invention discloses a kind of multiplication of voltage square-wave generator of the repetition rate based on magnetic switch, comprise adjustable pulse source, magnetic pulse compression circuit, square wave multiplication of voltage Marx generator and matched load; This square-wave generator cascade is after main capacitance or pulse transformer, and after pulse forming line charged in parallel at different levels, discharged in series obtains to matched load and exports square-wave pulse, to reach the object of multiplication of voltage, high repetition frequency, compression rising edge.Pulse forming switch of the present invention is magnetic switch, instead of traditional gas switch, in view of magnetic switch does not have the problem of electrode erosion and insulation recovery, thus this circuit can be run under high repetition frequency, in aftermentioned example, this square wave source can reach the repeated work frequency of more than 20kHz, far away higher than the 100Hz magnitude repeated work frequency of tradition based on pulse forming line square wave source.The use of magnetic switch also creates the effect of steepness square wave rising edge.
Description
Technical field
The invention belongs to pulse square wave-generator technical field, relate to a kind of multiplication of voltage square-wave generator of the repetition rate based on magnetic switch.
Background technology
Square-wave pulse power source welcomes development peak period due to the urgent application demand in the fields such as civilian industry, environmental protection, medical research and national defense and military, to power level, rise time, particularly repeated work frequency is proposed stricter requirement.The square wave source of tradition using pulse forming line as pulse shaping element, is difficult to obtain high repetition frequency, realizes at most 100H order of magnitude repetition rate.
Document 1(Harjes H, Reed K, Buttram M, et al.The Repetitive High EnergyPulsed PowerModule [C], 19th International Power Modulator Symposium, 1990.) the pulse square wave source based on pulse forming line is proposed.RHEPP (the Repetitive High Energy Pulsed Power) device of Sandia National Laboratory of U.S. development, 5 grades of magnetic pulse compressors are used to obtain potential pulse to PFL charging, voltage peak 2.5MV is produced after voltage superposition, the pulse of width 60ns, pulse energy is 3kJ.Its repetition rate can reach 120Hz.
Document 2(poplar is real, Meng Zhipeng, clock is brilliant, Yang Hanwu, Qian Baoliang. super-low impedance, the convoluted banded pulse forming line of all solid stateization. Applied Physics, 2010, 1 (2): 195-200.) long pulse based on magnetic switch and strip line designed by doctor Yang Shi of graduate school of the Chinese National University of Defense technology, super-low impedance pulse generator, by characteristic impedance 0.5 Ω, electrical length 115ns, the banded pulse forming line of the solid state being dielectric with DMD film obtains voltage 17.8kV on matched load, pulsewidth (FWHM) is 270ns, rising edge is about the quasi-square wave pulse of 20ns, system Absorbable organic halogens under 10Hz repetition runs.
Above-mentioned with PFL(pulse forming line) be the square-wave pulse generating means of critical component, its pulse forming switch mostly is gas switch, and repeated work frequency is up to the 100Hz order of magnitude, is difficult to the growth requirement adapting to current industrial.
Summary of the invention
The invention provides a kind of multiplication of voltage square-wave generator of the repetition rate based on magnetic switch, this generator can run under high repetition frequency, exports the square-wave pulse of multiplication of voltage, high repetition frequency.
The present invention is achieved through the following technical solutions:
Based on a multiplication of voltage square-wave generator for the repetition rate of magnetic switch, comprise adjustable pulse source, magnetic pulse compression circuit, square wave multiplication of voltage Marx generator and matched load; Magnetic pulse compression circuit is after the charging of adjustable pulse source, and to square wave multiplication of voltage Marx generator charged in parallel, after the charging complete of square wave multiplication of voltage Marx generator, discharged in series obtains to matched load and exports square-wave pulse;
Magnetic pulse compression circuit comprises and the electric capacity C of adjustable pulse source parallel connection and the magnetic switch MS that connects with square wave multiplication of voltage Marx generator, and electric capacity C is charged to peak value u by adjustable pulse source
0time, magnetic switch MS saturation conduction, electric capacity C is charged to square wave multiplication of voltage Marx generator by the pulsactor of magnetic switch MS;
Square wave multiplication of voltage Marx generator comprises N level charge/discharge unit, every grade of charge/discharge unit comprise a PFL, a pair coupling inductance to a magnetic switch MS, PFL by coupling inductance to be connected into circuit and coupling inductance to being connected to PFL in Same Name of Ends mode, magnetic switch MS connects screen and the core of adjacent level PFL, with coupling inductance to the same end or the heterodoxy that are connected to every grade of PFL; When charging, coupling inductance carries out charged in parallel to N level PFL, and magnetic switch MS saturation conduction at different levels after charging to peak value, N level PFL discharged in series is to matched load.
Described magnetic pulse compression circuit carries out charged in parallel by coupling inductance to N level PFL, the equiva lent impedance Z of every grade of PFL
0, length l, velocity of wave propagation v parameter be all consistent, PFL is magnetic switch MS at different levels saturation conduction simultaneously after charging to peak value, and N level PFL series connection is discharged to matched load; Produced on matched load by the every one-level PFL of wave process
times charging voltage,
the square-wave pulse of pulsewidth, superposition at different levels obtains
times charging voltage,
the repeated frequency high-voltage square-wave pulse of pulsewidth.
Described square wave multiplication of voltage Marx generator is for forming line style Marx generator, comprise N level charge/discharge unit, N level PFL charged in parallel, the PFL of every grade is connected into circuit with the screen of one end, core port by a pair coupling inductance, and this coupling inductance is connected to PFL in Same Name of Ends mode; The PFL of every grade and the right relevant parameter of coupling inductance identical, the coupling inductance Same Name of Ends direction of every side, N level PFL loop is consistent;
PFL at different levels closes discharged in series by magnetic switch MS, and the charging current of (n+1)th grade of PFL is flowed into end and is connected with the charging current outflow end of n level PFL by magnetic switch MS, and magnetic switch MS at different levels has identical parameters and is coupled in same magnetic core; The line skin of N level PFL is connected to matched load.
The parallel connection one of the charging current outflow end of the magnetic switch MS of described adjacent charge/discharge unit flows to identical diode with charging current.
Described at the in parallel diode of most final stage magnetic switch MS with the charging current outflow end of chopped-off head magnetic switch MS.
Described square wave multiplication of voltage Marx generator is for forming line discharge and recharge port isolated form Marx generator, comprise N level charge/discharge unit, N level PFL charged in parallel, screen, the core port of every grade of PFL head end are connected into circuit by a pair coupling inductance, and this coupling inductance is connected to PFL in Same Name of Ends mode, the PFL of every grade and the right relevant parameter of coupling inductance identical, the coupling inductance Same Name of Ends direction of every side, N level PFL loop is consistent;
PFL at different levels closes discharged in series by magnetic switch MS, the tail end core of (n+1)th grade of PFL passes through the skin-deep company of tail wire of magnetic switch MS and n level PFL, the core of the PFL of the first order is connected to ground by magnetic switch MS, and magnetic switch MS at different levels has identical parameters and is coupled in same magnetic core; The line skin of N level PFL is connected to matched load.
Described adjustable pulse source is the clock of frequency, adjustable pulse width.
Described magnetic switch MS adopts multiple magnetic core stacked and the mode being wound around wire is formed, by changing the parameter of number of turns and magnetic switch number adjustment magnetic switch: voltagesecond product α, namely magnetic core is saturated to the added value of magnetic flux forward saturation history from negative sense, thus controls the saturation time of magnetic switch under certain voltage.Because its equivalent inductance value of the saturated front and back of magnetic switch is undergone mutation, magnetic switch two terminals can be considered as before saturation disconnect, be considered as after saturation connect, produce the operating characteristic of similar switch, thus magnetic switch saturated after make PFL discharged in series at different levels.
Load that square-wave pulse generator connects based on PFL is matched load NZ
0, N is progression, Z
0for the characteristic impedance of PFL.
Compared with prior art, the present invention has following useful technique effect:
The multiplication of voltage square-wave generator of the repetition rate based on magnetic switch provided by the invention, utilize coupling inductance to charge and isolation, magnetic switch is pulse forming switch, and pulse forming line is the square wave multiplication of voltage Marx generator of the high repetition frequency of square wave generating device.By coupling inductance, charged in parallel is carried out to N level PFL, require the Z of every grade of PFL
0, l, v parameter is all consistent, magnetic switch at different levels saturation conduction simultaneously after charging to peak value;
N level PFL series connection is discharged to matched load NZ0, is produced on matched load by the every one-level PFL of wave process
times charging voltage,
the square-wave pulse of pulsewidth, superposition at different levels thus obtain
times charging voltage,
the repeated frequency high-voltage square-wave pulse of pulsewidth.
The multiplication of voltage square-wave generator of the repetition rate based on magnetic switch provided by the invention, pulse forming switch is magnetic switch (satiable inductor), instead of traditional gas switch, in view of magnetic switch does not have the problem of electrode erosion and insulation recovery, thus this circuit can be run under high repetition frequency, in aftermentioned example, this square wave source can reach the repeated work frequency of more than 20kHz, far away higher than the 100Hz magnitude repeated work frequency of tradition based on pulse forming line square wave source.The use of magnetic switch also creates the effect of steepness square wave rising edge.
The multiplication of voltage square-wave generator of the repetition rate based on magnetic switch provided by the invention, have employed the structure of coupling inductance isolated form Marx generator, ensure that quick charge, reduces the voltagesecond product requirement to satiable inductor.
The multiplication of voltage square-wave generator of the repetition rate based on magnetic switch provided by the invention, achieving can the square-wave pulse generating function of multiplication of voltage.As long as input power is repetition rate, multiplication of voltage square-wave generator just can be allowed to work in repetition rate state.
Accompanying drawing explanation
Fig. 1 is the circuit structure diagram of the multiplication of voltage square-wave generator (secondary) based on the repetition rate of magnetic switch.
Fig. 2 is the circuit topology figure of secondary based on the formation line style typical Marx Generator of magnetic switch.
Fig. 3 is the experimental voltage oscillogram of the multiplication of voltage square-wave generator (secondary) based on the repetition rate of magnetic switch.
Fig. 4 be based on the repetition rate of magnetic switch multiplication of voltage square-wave generator (secondary) emulation voltage oscillogram.
Fig. 5 is that secondary forms line discharge and recharge port isolated form Marx generator circuit topological diagram based on magnetic switch.
Fig. 6 is the formation line style Marx generator circuit topological diagram of secondary based on magnetic switch charged in parallel.
Fig. 7-1 ~ 7-2 is the formation line style Marx generator circuit topological diagram of secondary based on magnetic switch charged in parallel diode current limliting.
Embodiment
Below in conjunction with specific embodiment, the present invention is described in further detail, and the explanation of the invention is not limited.
The invention provides a kind of multiplication of voltage square-wave generator of the repetition rate based on magnetic switch, this square-wave generator cascade is after main capacitance or pulse transformer, after pulse forming line charged in parallel at different levels, discharged in series obtains to matched load and exports square-wave pulse, to reach the object of multiplication of voltage, high repetition frequency, compression rising edge.
Based on a multiplication of voltage square-wave generator for the repetition rate of magnetic switch, comprise adjustable pulse source, magnetic pulse compression circuit, square wave multiplication of voltage Marx generator and matched load; Magnetic pulse compression circuit is after the charging of adjustable pulse source, and to square wave multiplication of voltage Marx generator charged in parallel, after the charging complete of square wave multiplication of voltage Marx generator, discharged in series obtains to matched load and exports square-wave pulse;
Magnetic pulse compression circuit comprises and the electric capacity C of adjustable pulse source parallel connection and the magnetic switch MS that connects with square wave multiplication of voltage Marx generator, and electric capacity C is charged to peak value u by adjustable pulse source
0time, magnetic switch MS saturation conduction, electric capacity C is charged to square wave multiplication of voltage Marx generator by the pulsactor of magnetic switch MS;
Square wave multiplication of voltage Marx generator comprises N level charge/discharge unit, every grade of charge/discharge unit comprises a PFL(pulse forming line), a pair coupling inductance to a magnetic switch MS, PFL by coupling inductance to be connected into circuit and coupling inductance to being connected to PFL in Same Name of Ends mode, magnetic switch MS connects screen and the core of adjacent level PFL, with coupling inductance to the same end or the heterodoxy that are connected to every grade of PFL; When charging, coupling inductance carries out charged in parallel to N level PFL, and magnetic switch MS saturation conduction at different levels after charging to peak value, N level PFL discharged in series is to matched load.
Magnetic switch MS adopts multiple magnetic core stacked and the mode being wound around wire is formed, by changing the parameter of number of turns and magnetic switch number adjustment magnetic switch: voltagesecond product α, namely magnetic core is saturated to the added value of magnetic flux forward saturation history from negative sense, thus controls the saturation time of magnetic switch under certain voltage.Because its equivalent inductance value of the saturated front and back of magnetic switch is undergone mutation, magnetic switch two terminals can be considered as before saturation disconnect, be considered as after saturation connect, produce the operating characteristic of similar switch, thus magnetic switch saturated after make PFL discharged in series at different levels.
Load that square-wave pulse generator connects based on PFL is matched load NZ
0, N is progression, Z
0for the characteristic impedance of PFL.
Multiplication of voltage square wave based on the multiplication of voltage square-wave generator of the repetition rate of magnetic switch produces as follows:
By coupling inductance, charged in parallel is carried out to N level PFL, require the equiva lent impedance Z of every grade of PFL
0, length l, velocity of wave propagation v parameter be all consistent, magnetic switch at different levels saturation conduction simultaneously after charging to peak value, N level PFL connects to matched load NZ
0electric discharge, is produced on matched load by the every one-level PFL of wave process
times charging voltage,
the square-wave pulse of pulsewidth, superposition at different levels thus obtain
times charging voltage,
the repeated frequency high-voltage square-wave pulse of pulsewidth.
The concrete coupling inductance that utilizes is charged and isolation, and magnetic switch is pulse forming switch, and pulse forming line is the square wave multiplication of voltage Marx generator of the high repetition frequency of square wave generating device.Because coupling inductance, magnetic switch are different from the method for attachment of formation line, this Marx generator has various topological structures, enumerates some typical circuit topological structures as follows.
Embodiment 1
See Fig. 1, Fig. 2, based on the formation line style typical Marx Generator of magnetic switch, comprise frequency Pulse Width adjustable pulse source; Magnetic pulse compression circuit; Based on the formation line style Marx generator of magnetic switch; Matched load four parts, wherein the structure of line style Marx generator is:
N level PFL charged in parallel, the screen (skin) of every one-level PFL one end, core port are all connected into circuit by a pair coupling inductance, and this coupling inductance is connected to PFL in Same Name of Ends mode, N level PFL and the right relevant parameter of coupling inductance thereof should be identical, and the coupling inductance Same Name of Ends direction of every side, N level PFL loop should be consistent.PFL at different levels by the method for attachment of magnetic switch discharged in series is: the charging current of (n+1)th grade of PFL is flowed into end and is connected with the charging current outflow end of n level PFL by satiable inductor (magnetic switch), and satiable inductor at different levels should have identical parameters and be coupled in same magnetic core.The line skin of N level PFL is connected to matched load.
Work as C
1peak value u is charged to by front stage circuits
0time, magnetic switch MS
1saturation conduction, subsequently C
1pass through MS
1pulsactor start to the resonant charging of Marx generator.Recharge here the stage, the electric current summation of the coupling inductance of Marx generator is 0, thus ensures that it can be considered short circuit.Therefore, Marx generator is equivalent to two PFL parallel connections, obtains good charging consistency.
Work as PFL
1with PFL
2parallel resonance charges to peak value u
0time, magnetic switch MS
2with MS
3saturation conduction, PFL
1with PFL
2rapid discharged in series is to matched load Z
l(Z
lequal 2Z
0), now coupling inductance plays inter-stage buffer action.Every one-level PFL forms amplitude by wave process on matched load
times charging voltage u
0,
the square-wave pulse of pulsewidth, two-stage superposes thus obtains amplitude u
0,
the repeated frequency high-voltage square-wave pulse of pulsewidth, thus the target realizing multiplication of voltage, high repetition frequency, square-wave pulse output.
Test the pulse forming line PFL chosen
1-PFL
2for SYV train of radio frequency coaxial cable, model is 5-3-1, and wave impedance is 75 Ω, and length is 95 meters, and frequency Pulse Width adjustable pulse source produces amplitude 300V, the pulse of pulsewidth 4 μ s exports, and matched load is 150 Ω resistance.
Figure 3 shows that experimental waveform, visible PFL
1-PFL
2charging holding consistency is better, PFL
1-PFL
2when charging to peak value 320V, magnetic switch MS
2-MS
3saturation conduction, PFL discharged in series to matched load forms the square-wave waveform that square wave creates 380V, pulse halfwidth 800ns, rising edge 330ns, realizes good multiplication of voltage.
Fig. 4 is Pspice software emulation gained waveform, and PFL charges to peak value 440V, and magnetic switch saturation conduction, matched load produces amplitude 480V, and rising edge is about 170ns, and pulse duration is about the square wave of 950ns, demonstrates good multiplication of voltage and square wave occurrence features thereof.
Embodiment 2
Figure 5 shows that secondary forms line discharge and recharge port isolated form Marx generator circuit topological diagram, with secondary based on the formation line style Marx generator of magnetic switch circuit topological structure compared with, change the method for attachment of magnetic switch: PFL
5with PFL
6head end is connected into circuit by coupling inductance, and tail end passes through the connection discharged in series of magnetic switch to matched load.
The connection of tail end magnetic switch is: the core of chopped-off head PFL tail end is by MS7 ground connection, and n level PFL tail wire skin is connected to n+1 level PFL tail end core by magnetic switch.Charging process coupling inductance presents small inductor and is equivalent to short circuit, and magnetic switch presents large inductance and is equivalent to open circuit, and Marx generator is equivalent to PFL parallel connection, obtains good charging consistency.
The advantage that secondary forms line discharge and recharge port isolated form Marx generator is, the voltage fluctuation of discharged in series moment PFL head end need through a transmission time
wave process just transfer to the tail end of electric discharge, the rising edge exporting square wave on matched load can be improved, thus obtain higher-quality square-wave pulse.
Embodiment 3
Figure 6 shows that secondary magnetic switch charged in parallel type Marx generator circuit topological diagram, with secondary based on the formation line style Marx generator of magnetic switch circuit topological structure compared with, exchanged the position of magnetic switch and PFL.By coupling inductance to magnetic switch MS
10-MS
12carry out charged in parallel.
The advantage of secondary magnetic switch charged in parallel type Marx generator is, original circuit topological structure is as magnetic switch MS
10-MS
12impedance and PFL
9-PFL
10impedance is compared hour, MS in charging process
10-MS
12can larger current be flow through, cause the electric current flowing through each coupling inductance different, thus magnetic flux be uneven, PFL
9-PFL
10charging consistency is deteriorated.When topological structure described in Fig. 6 flows through larger current on magnetic switch, the magnetic flux balance of coupling inductance will be improved, thus steepness exports the rising edge of square wave.
The magnetic switch of secondary shown in Fig. 6 charged in parallel diode current-limiting type Marx generator can when discharged in series, matched load occurs precharge phenomenon, the characteristic of reverse circulated can be limited to improve waveform by diode, thus forming the formation line style Marx generator of the secondary magnetic switch charged in parallel diode current limliting as shown in accompanying drawing 7-1, Fig. 7-2, minimizing prepulsing is obtained more high-quality square-wave pulse by diode.
Claims (5)
1. based on a multiplication of voltage square-wave generator for the repetition rate of magnetic switch, it is characterized in that, comprise adjustable pulse source, magnetic pulse compression circuit, square wave multiplication of voltage Marx generator and matched load; Magnetic pulse compression circuit is after the charging of adjustable pulse source, and to square wave multiplication of voltage Marx generator charged in parallel, after the charging complete of square wave multiplication of voltage Marx generator, discharged in series obtains to matched load and exports square-wave pulse;
Magnetic pulse compression circuit comprises and the electric capacity C of adjustable pulse source parallel connection and the magnetic switch MS that connects with square wave multiplication of voltage Marx generator, and electric capacity C is charged to peak value u by adjustable pulse source
0time, magnetic switch MS saturation conduction, electric capacity C is charged to square wave multiplication of voltage Marx generator by the pulsactor of magnetic switch MS;
Square wave multiplication of voltage Marx generator comprises N level charge/discharge unit, every grade of charge/discharge unit comprise a PFL, a pair coupling inductance to a magnetic switch, PFL by coupling inductance to be connected into circuit and coupling inductance to being connected to PFL in Same Name of Ends mode, magnetic switch MS connects screen and the core of adjacent level PFL, with coupling inductance to the same end or the heterodoxy that are connected to every grade of PFL; When charging, coupling inductance carries out charged in parallel to N level PFL, magnetic switch MS saturation conduction at different levels after charging to peak value, and N level PFL discharged in series is to matched load;
Described square wave multiplication of voltage Marx generator is for forming line discharge and recharge port isolated form Marx generator, comprise N level charge/discharge unit, N level PFL charged in parallel, screen, the core port of every grade of PFL head end are connected into circuit by a pair coupling inductance, and this coupling inductance is connected to PFL in Same Name of Ends mode, the PFL of every grade and the right relevant parameter of coupling inductance identical, the coupling inductance Same Name of Ends direction of every side, N level PFL loop is consistent;
PFL at different levels is by magnetic switch discharged in series, the tail end core of N+1 level PFL passes through the skin-deep company of tail wire of magnetic switch MS and N level PFL, the core of the PFL of the first order is connected to ground by magnetic switch MS, and magnetic switch MS at different levels has identical parameters and is coupled in same magnetic core; The line skin of N level PFL is connected to matched load.
2., as claimed in claim 1 based on the multiplication of voltage square-wave generator of the repetition rate of magnetic switch, it is characterized in that, magnetic pulse compression circuit carries out charged in parallel by coupling inductance to N level PFL, the equiva lent impedance Z of every grade of PFL
0, length
l, velocity of wave propagation
vparameter is all consistent, and PFL is magnetic switch MS at different levels saturation conduction simultaneously after charging to peak value, and N level PFL series connection is discharged to matched load; Produced on matched load by the every one-level PFL of wave process
times charging voltage,
the square-wave pulse of pulsewidth, superposition at different levels obtains
times charging voltage,
the repeated frequency high-voltage square-wave pulse of pulsewidth.
3., as claimed in claim 1 based on the multiplication of voltage square-wave generator of the repetition rate of magnetic switch, it is characterized in that, described adjustable pulse source is the clock of frequency, adjustable pulse width.
4. as claimed in claim 1 based on the multiplication of voltage square-wave generator of the repetition rate of magnetic switch, it is characterized in that, magnetic switch MS adopts multiple magnetic core stacked and the mode being wound around wire is formed, by changing the parameter of number of turns and magnetic switch number adjustment magnetic switch: voltagesecond product α, namely magnetic core is saturated to the added value of magnetic flux forward saturation history from negative sense, thus controls the saturation time of magnetic switch under certain voltage.
5., as claimed in claim 1 based on the multiplication of voltage square-wave generator of the repetition rate of magnetic switch, it is characterized in that, the load that square-wave pulse generator connects based on PFL is matched load NZ
0, N is progression, Z
0for the characteristic impedance of PFL.
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| CN106066923B (en) * | 2016-06-22 | 2019-01-08 | 哈尔滨工业大学 | The preparation method of the circuit parameter of magnetic pulse compression network in a kind of power supply for EUV light source |
| CN106422704B (en) * | 2016-11-04 | 2022-10-14 | 浙江大学 | Integrated deep removal system for multiple pollutants |
| RU2636108C1 (en) * | 2017-02-14 | 2017-11-20 | Михаил Владимирович Ефанов | High-voltage pulse generator |
| CN108449074B (en) * | 2018-03-12 | 2021-11-19 | 中国人民解放军国防科技大学 | High-power pulse back edge sharpening circuit based on magnetic switch |
| CN110289833B (en) * | 2019-06-18 | 2023-03-28 | 中国工程物理研究院应用电子学研究所 | Single-stage capacitor network, high-voltage pulse source device and pulse power source main body structure |
| CN110445480B (en) * | 2019-08-05 | 2023-03-28 | 西安热工研究院有限公司 | Multi-stage fast-front-edge high-voltage pulse trigger and synchronization method thereof |
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