CN105610414B - Pouring-in bipolarity two fingers number electromagnetic pulse generating device - Google Patents
Pouring-in bipolarity two fingers number electromagnetic pulse generating device Download PDFInfo
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- CN105610414B CN105610414B CN201610203199.7A CN201610203199A CN105610414B CN 105610414 B CN105610414 B CN 105610414B CN 201610203199 A CN201610203199 A CN 201610203199A CN 105610414 B CN105610414 B CN 105610414B
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K3/00—Circuits for generating electric pulses; Monostable, bistable or multistable circuits
- H03K3/02—Generators characterised by the type of circuit or by the means used for producing pulses
- H03K3/335—Generators characterised by the type of circuit or by the means used for producing pulses by the use, as active elements, of semiconductor devices with more than two electrodes and exhibiting avalanche effect
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Abstract
The invention discloses a kind of pouring-in bipolarity two fingers number electromagnetic pulse generating devices, are related to the field of circuit technology for generating electric pulse.The generating device includes DC power supply, trigger circuit, isolating transformer and Marx circuit, the output end of the DC power supply is connect with the power input of the trigger circuit and Marx circuit respectively, the output end of the trigger circuit is connect through the isolating transformer with the signal input part of the Marx circuit, and the output end of the Marx circuit is the pulse signal output end of the pulse generating unit.The output pulse polarity of the generating device is optional, small in size, triggering stability is high.
Description
Technical field
The present invention relates to for generating electric pulse field of circuit technology more particularly to a kind of pouring-in bipolarity two fingers number
Electromagnetic pulse generating device.
Background technique
Two kinds of disturbers of conduction and radiation are simulated frequently with injection method and irradiation method in electromagnetic compatibility effect experiment
Formula, and carry out with this electromagnetic immunity/sensibility of assessment electronics or device.Injection method is directly that interference source is (such as double
Index is fastly along electromagnetic pulse) injection subject device, circuit or device port, the advantages of injection method is experimental condition and step letter
It is single, and so that Device under test is obtained certain voltage value and energy value using the relatively low source of power；Furthermore relatively
In irradiation method, injection method also have many advantages, such as it is reproducible, convenient for waveform inside observation circuit.Therefore, injection method is to carry out electricity
One important means of magnetic field impulse effect study.Two fingers number electromagnetic pulse is a kind of Radar Pulse Interference Source of common type, as height
The pouring-in fast rising pulse source of two fingers number of stability is the premise of guarantee test result repeatability, and different polarity is for electromagnetism
Compatible effect test be also it is essential, therefore, develop a kind of ambipolar pulse hair of pouring-in two fingers number of high stability
Raw device has important practical value.
Marx circuit be it is a kind of typical and common fastly along burst pulse generating device, it is by means of energy-storage system charging battery
Energy storage is carried out, then energy is released quickly against in load by high-speed switch, forms the arteries and veins that forward position is very steep, pulsewidth is relatively narrow
Punching, in order to realize the output of both positive and negative pulse, the beginning and terminal of circuit are respectively arranged with load resistance, entire pulse generation
Device includes DC power supply, trigger circuit and Marx circuit, for bipolar pulse circuit, the ground and Marx circuit of trigger circuit
It cannot be found through experiments that directly altogether, when triggering and after power ground is disconnected, due to the disunity of ground potential,
Marx circuit is easy how to solve the problems, such as the self-triggering also unprecedented corresponding report of clock from triggering.
Summary of the invention
Technical problem to be solved by the invention is to provide a kind of pouring-in bipolarity two fingers number electromagnetic pulse generating device,
The output pulse polarity of the generating device is optional, small in size, triggering stability is high.
In order to solve the above technical problems, the technical solution used in the present invention is: a kind of pouring-in bipolarity two fingers number electricity
Magnetic pulse generator, it is characterised in that: including DC power supply, trigger circuit, isolating transformer and Marx circuit, the direct current
The output end of power supply is connect with the power input of the trigger circuit and Marx circuit respectively, the output end of the trigger circuit
It is connect through the isolating transformer with the signal input part of the Marx circuit, the output end of the Marx circuit is the pulse
The pulse signal output end of generating device.
A further technical solution lies in: the DC power supply includes transformer U1, capacitor C11-C15 and diode D11-
The input of D14, transformer U1 terminate alternating current, and an output end of transformer U1 is connect with one end of capacitor C11, capacitor C11
The other end connect through capacitor C13 with the cathode of diode D14, the anode of diode D14 is successively after capacitor C14, capacitor C12
It is connect with the another output of transformer U1, the anode of diode D11 and the cathode of diode D12 meet capacitor C11 and electricity
Hold the node of C13, the cathode of diode D11 connects the node of capacitor C12 Yu transformer U1, the anode of diode D12 and two poles
The cathode of pipe D13 connects the node of capacitor C12 Yu capacitor C14, node the bearing for the DC power supply of transformer U1 and capacitor C12
The node of pole output end, capacitor C14 and diode D14 are the cathode output end of the DC power supply, and the capacitor C15 is connected in parallel on
The output end of the DC power supply.
It include first order trigger circuit and second level trigger circuit a further technical solution lies in: the trigger circuit,
The first order trigger circuit includes that NE555 timer U2 and shaping chip U3, the U3 use 74LS123,1 foot of the U2
Ground connection, 2 feet of the U2 are divided into two-way, and the first via is grounded through resistance R21, the triggered switch S21 ground connection in the second tunnel；The U2's
3 feet are connect with 2 feet of the U3；4 feet of the U2 connect power supply；The 5 foot meridian capacitor C21 of the U2 are grounded；6 feet of the U2 point
For three tunnels, the first via is grounded through capacitor C22, and the second tunnel connects power supply through resistance R22, and third road is connect with 7 feet of the U2；It is described
8 feet of U2 connect power supply；1 foot of the U3 is grounded；3 feet of the U3 connect power supply；It is divided into two after the 14 foot meridian capacitor C23 of the U3
Road, the first via are connect with 15 feet of the U3, and the second tunnel connects power supply through resistance R23；It is divided into after the 13 foot meridian capacitor C24 of the U3
Two-way, the first via are the output end of the first order trigger circuit, and the second tunnel is grounded through resistance R24, other pins of the U3
Vacantly；
The second level trigger circuit includes triode Q21, and the output end of the first order trigger circuit and the second level are touched
The input terminal of Power Generation Road connects, and the input terminal of the second level trigger circuit is divided into two-way, and the first via is after backward dioded D21
Ground connection, the second tunnel are connect with the base stage of triode Q21, and the emitter ground connection of triode Q21, the collector of triode Q21 is divided into
Two-way, the first via are followed by power supply through resistance R25, and the second tunnel is connect with one end of capacitor C25, and the other end of capacitor C25 is divided into two
Road, the first via are grounded through capacitor C26, and the second tunnel is grounded through resistance R26, and the node of the capacitor C25 and resistance R26 are the touching
The signal output end of Power Generation Road.
A further technical solution lies in: the Marx circuit include input stage circuit, several grades of charging circuits, several
Avalanche transistor switch T32 and load resistance R35, the input stage circuit include primary avalanche transistor switch T31, isolation change
Depressor U4 and current-limiting resistance R31, the output end of trigger circuit are connect with an input terminal of the isolating transformer U4 primary, every
Another input end grounding from transformer U4 primary, the secondary both ends of isolating transformer U4 are connect respectively in primary trigger switch
The base stage and emitter of T31, current-limiting resistance R31 are connected in parallel on the secondary both ends of isolating transformer U4；First order charge-discharge circuit packet
Current-limiting resistance R32, charging resistor R33 and charging capacitor C31, VCC are included successively through current-limiting resistance R32, charging capacitor C31, charging
It is grounded after resistance R33；Subsequent stages charging circuit include current-limiting resistance R36, charging resistor R34 and charging capacitor C32, VCC according to
It is secondary to be grounded after current-limiting resistance R36, charging capacitor C32, charging resistor R34；The collector of several avalanche transistor switches T32
Connect the node between the current-limiting resistance R36 and charging capacitor C32 of n-th grade of charging circuit, the base stage and hair of avalanche transistor T32
Emitter-base bandgap grading is shorted the node being followed by between the charging resistor R34 and charging capacitor C32 of (n+1)th grade of charging circuit, the last one snow
The base stage and emitter short circuit for collapsing triode switch T32 are followed by one end of load resistance R35, the other end of load resistance R35
Ground connection, n are the natural number greater than 3.
A further technical solution lies in: the Marx circuit, isolating transformer and trigger circuit are located in shielding box.
The beneficial effects of adopting the technical scheme are that one end connection trigger circuit of isolating transformer
Ground realizes trigger circuit and Marx circuit altogether, and avoiding the skimble-scamble factor of current potential leads to triggering certainly for Marx circuit, protects
The stability of triggering is demonstrate,proved.All switching devices are all made of the avalanche transistor FMMT415 of patch encapsulation.Pass through pre-stage test
It was found that novel avalanche transistor be it is a kind of it is more satisfactory the device of quick response and very big peak power can be provided simultaneously,
Switch conduction times can be made greatly to be shortened using its avalanche effect, the stability and consistency than FMMT417 are more
It is good；In addition, reducing the volume of clock using patch encapsulation.
The method of isolating transformer is installed in the triggering input terminal of Marx circuit to realize that totally, isolating transformer is to direct current
Charging voltage be isolation, but the trigger signal of high frequency can be passed through, to realize trigger circuit and charging electricity
Road totally.The isolating transformer has selected the radio-frequency transformer of mini company, since trigger circuit exports rising edge of a pulse
Suddenly, frequency is higher, therefore has selected the patch radio-frequency transformer of model ADT1-1, and working frequency arrives for 0.1MHz
400MHz can make the avalanche transistor in the undistorted triggering first order charge-discharge circuit of trigger signal.
The trigger circuit uses second level trigger circuit, improves the driving capability of trigger circuit and the stabilization of triggering
Property.First order trigger circuit is made of 555 timers, 74LS123 shaping circuit and peripheral circuit, and output signal is pulsewidth us
Grade, the signal that amplitude is 5V, are the input signal of second level trigger circuit, second level trigger circuit is by avalanche transistor
MMBT3904 and peripheral circuit composition, export the sharp pulse signal that a voltage is 50V, pulse front edge is 5ns, are made by the pulse
For the trigger signal of Marx impulse circuit, the stability of the load driving capability and triggering when triggering can be improved.
The voltage value of DC power supply is 250V.It is found according to the test of early period, avalanche transistor is 250V in supply voltage
When, turn-on effect is best.It is described in order to reduce the influence of external electromagnetic interference source and high-voltage DC power supply to clock
Marx snowslide circuit is placed in shielding box, circuit ground effect can be made more preferable in this way, and waveform is more smooth, and repeatability is more
It is good.
To sum up, the output pulse polarity of the generating device is optional, small in size, triggering stability is high.
Detailed description of the invention
Fig. 1 is the functional block diagram of pulse generating unit of the present invention；
Fig. 2 is the schematic diagram of DC power supply in generating device of the present invention；
Fig. 3 is the schematic diagram of trigger circuit in generating device of the present invention；
Fig. 4 is the schematic diagram of Marx circuit in generating device of the present invention.
Specific embodiment
With reference to the attached drawing in the embodiment of the present invention, technical solution in the embodiment of the present invention carries out clear, complete
Ground description, it is clear that described embodiment is only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
In the following description, numerous specific details are set forth in order to facilitate a full understanding of the present invention, but the present invention can be with
Implemented using other than the one described here other way, those skilled in the art can be without prejudice to intension of the present invention
In the case of do similar popularization, therefore the present invention is not limited by the specific embodiments disclosed below.
As shown in Figure 1, the invention discloses a kind of pouring-in bipolarity two fingers number electromagnetic pulse generating device, including direct current
Power supply, trigger circuit, isolating transformer and Marx circuit, the output end of the DC power supply respectively with the trigger circuit and
The power input of Marx circuit connects, and the output end of the trigger circuit is through the isolating transformer and the Marx circuit
Signal input part connection, the output end of the Marx circuit are the pulse signal output end of the pulse generating unit.
The DC power supply of exportable 250V DC voltage is to the capacitor charging in Marx circuit；Trigger circuit uses NE555
A sharp pulse is exported with 74LS123 circuit structure, entire being turned on or off for Marx circuit is controlled；Export pulse by
Marx circuit output connection oscillograph is shown.Wherein, DC power supply is connected with the ground of Marx circuit, trigger circuit by every
Altogether from transformer and Marx circuit, in order to guarantee good earthing effect, Marx circuit is placed in shielding box, shielding box
It is equivalent to ground, the output end of Marx circuit is connected with the output terminal of BNC connector, and fixing end is fixed by screws in shielding box
On, thus ensure that entire pulse generating unit various pieces it is good altogether.
As shown in Fig. 2, the DC power supply includes transformer U1, capacitor C11-C15 and diode D11-D14, transformer
The input of U1 terminates alternating current, and an output end of transformer U1 is connect with one end of capacitor C11, the other end warp of capacitor C11
Capacitor C13 is connect with the cathode of diode D14, diode D14 anode successively after capacitor C14, capacitor C12 with transformer U1
Another output connection, the anode of diode D11 and the cathode of diode D12 connect the knot of capacitor C11 Yu capacitor C13
Point, the cathode of diode D11 connect the node of capacitor C12 Yu transformer U1, the anode of diode D12 and bearing for diode D13
Pole connects the node of capacitor C12 Yu capacitor C14, and the node of transformer U1 and capacitor C12 is the cathode output end of the DC power supply,
The node of capacitor C14 and diode D14 is the cathode output end of the DC power supply, and the capacitor C15 is connected in parallel on the direct current
The output end of power supply.
The DC power supply is made of four voltage doubling rectifing circuits and capacitor filter, and voltage doubling rectifing circuit is to utilize filtering
The memory action of capacitor can obtain the output voltage times over transformer secondary voltage by multiple capacitors and diode；In sky
In the case where load, the voltage at the both ends capacitor C11 isU1, using the both ends capacitor C12 as output end, the value of output voltage is 2U1, and so on, it finally can get 4 timesThe output voltage of U1, it is contemplated that after being loaded on circuit band, output electricity
Pressure would be impossible to the multiple for reaching U1 peak value, and in order to enable supply voltage to reach desired output voltage, U1 is taken as 50V, institute
Have capacitor select pressure resistance be 300V, the electrolytic capacitor that capacity is 10uF, be connected in parallel with a capacitor in the output end of voltage doubling rectifing circuit
Capacitor filter is constituted, capacitor filter is acted on using the charge and discharge of capacitor, is kept output voltage smooth-out, is filtered
Effect depend on discharge time, capacitor Yu is big, and load resistance Yu is big, and output voltage Yu is smooth after filtering, stability better,
Here to have selected pressure resistance be 500V, the electrolytic capacitor that capacity is 47 uF, and filter capacitor Yu is big, and the angle of flow of diode will be smaller,
So it is capacitor charging, this longevity to diode that rectifier diode will flow through a very big dash current within the of short duration time
Life and stability are very unfavorable, so the maximal integer mass flow average current to diode has very high requirement, have selected here maximum whole
Flow the rectifier diode that average current is 1A.The DC power supply circuit can export the DC output voltage of 250V, to realize
Voltage between 180V and 260V can be realized by adjusting the multiple of voltage doubling rectifing circuit and the voltage of transformer secondary.
Due to the DC power supply that clock needs high voltage, low current, a stability high, the stability of DC power supply will be directly affected
Marx impulse circuit exports the flatness and stability of pulse, by selecting biggish filter capacitor and voltage doubling rectifing circuit to realize
The indices of DC power supply, the Switching Power Supply to compare in the market, volume have also obtained further diminution, this will have
Conducive to the integrated and Miniaturization Design of entire clock system.
As shown in figure 3, the trigger circuit includes first order trigger circuit and second level trigger circuit, the first order touching
Power Generation Road includes that NE555 timer U2 and shaping chip U3, the U3 use 74LS123, and 1 foot of the U2 is grounded, the U2
2 feet be divided into two-way, the first via is grounded through resistance R21, the triggered switch S21 in the second tunnel ground connection；3 feet and the U3 of the U2
2 feet connection；4 feet of the U2 connect power supply；The 5 foot meridian capacitor C21 of the U2 are grounded；6 feet of the U2 are divided into three tunnels, and first
Road is grounded through capacitor C22, and the second tunnel connects power supply through resistance R22, and third road is connect with 7 feet of the U2；8 feet of the U2 connect electricity
Source；1 foot of the U3 is grounded；3 feet of the U3 connect power supply；Be divided into two-way after the 14 foot meridian capacitor C23 of the U3, the first via with
15 feet of the U3 connect, and the second tunnel connects power supply through resistance R23；It is divided into two-way, the first via after the 13 foot meridian capacitor C24 of the U3
For the output end of the first order trigger circuit, the second tunnel is grounded through resistance R24, other pin floating of the U3；
The second level trigger circuit includes triode Q21, and the output end of the first order trigger circuit and the second level are touched
The input terminal of Power Generation Road connects, and the input terminal of the second level trigger circuit is divided into two-way, and the first via is after backward dioded D21
Ground connection, the second tunnel are connect with the base stage of triode Q21, and the emitter ground connection of triode Q21, the collector of triode Q21 is divided into
Two-way, the first via are followed by power supply through resistance R25, and the second tunnel is connect with one end of capacitor C25, and the other end of capacitor C25 is divided into two
Road, the first via are grounded through capacitor C26, and the second tunnel is grounded through resistance R26, and the node of the capacitor C25 and resistance R26 are the touching
The signal output end of Power Generation Road.
One stable rectangular pulse is generated by NE555 timer, due to the performance parameter of NE555 itself, pulse is wide
Degree minimum can only achieve us grades, and the triode T1 of the input stage circuit of Marx impulse circuit needs a trigger pulse to be touched
Hair, the forward position of trigger pulse can generate certain influence, the pulsewidth of trigger pulse to the stability of Marx circuit output waveform
It meets the requirements.If the pulsewidth of trigger pulse is greater than the charging time of Marx circuit, a trigger pulse will be will appear
Interior Marx circuit multiple discharge, thus the case where generating multiple pulses.In order to avoid the appearance of such case, using 74LS123
Shaping circuit shortens trigger pulse, it is made to be less than the charging time of Marx circuit.To further decrease pulsewidth, rising edge is improved
Steepness has added differential circuit in the output end of 74LS123 shaping circuit, can make in this way output trigger signal forward position compared with
Suddenly, but amplitude is lower, and driving capability is weak.Since the stability of impulse circuit output pulse is heavily dependent on trigger pulse
Leading-edge steepness and driving capability, therefore, behind first order trigger circuit again joined second level trigger circuit, the triggering
Circuit is mainly made of avalanche transistor MMBT3904 and peripheral circuit, his snowslide conducting voltage is 50V, so adopting here
It is powered with the DC power supply of 50V to it, as its input pulse, specific working principle is level-one trigger pulse: connecting electricity
Source is charged to capacitor C25, when the switch S21 of first order trigger circuit is pressed, triode Q21 conducting, on the right side of capacitor C25
End generates the sharp pulse of a 50V, then the differential circuit by being made of resistance R26 and capacitor C26, to the sharp pulse carry out into
The steepness of one step, finally export an output voltage be 50V, the sharp pulse that pulse front edge is 5ns, it is electric as Marx by the pulse
The trigger signal on road generates the trigger signal of certain repetition rate if necessary, it is only necessary to which the switch S21 trigger circuit is short
The resistance and capacitance parameter of 555 generators are modified in road as needed.
It is found by analysis and research, increases trigger signal slope K, may make the triggering of pulse is shaken to reduce.In order to increase
Trigger signal slope K devises the triggering modes of 2 grades of triggerings, by first order trigger circuit generate an amplitude is lower, forward position compared with
Steep pulse, as the input signal of second level trigger circuit, since second level trigger circuit is three pole of snowslide using triode
Pipe MMBT3904 is as switch, and supply voltage is using 50V, and using avalanche theory, second level trigger circuit can be provided
One rising edge is steeper, and the stronger trigger signal of driving capability can effectively improve triggering stability problem.It is surveyed by experiment
Examination, compared different rising edge trigger signals as a result, (sample size is 50 times) as shown in table 1, as can be seen from the table, if
The trigger circuit combined using level-one triggering and two-stage triggering, triggered time are shaken very little, meet and mention for MARX impulse circuit
For stable triggering, so that the output pulse stability of impulse circuit is more preferable, pulse front edge is steeper.
Influence of the different trigger signals of table 1 to triggering stability
| Trigger signal | Voltage | Rising edge | Slope K | Triggered time shakes variance |
| Only level-one triggers | 5V | 35ns | 0.14V/ns | 1.51ns |
| First order triggering and second level triggering | 50V | 5ns | 10V/ns | 0.017ns |
As shown in figure 4, the Marx circuit includes input stage circuit, several grades of charging circuits, several avalanche transistors
Switch T32 and load resistance R35, the input stage circuit include primary avalanche transistor switch T31, isolating transformer U4 and limit
Leakage resistance R31, the output end of trigger circuit are connect with an input terminal of the isolating transformer U4 primary, isolating transformer U4
Another primary input end grounding, the secondary both ends of isolating transformer U4 connect respectively primary trigger switch T31 base stage and
Emitter, current-limiting resistance R31 are connected in parallel on the secondary both ends of isolating transformer U4；First order charge-discharge circuit includes current-limiting resistance
R32, charging resistor R33 and charging capacitor C31, VCC are successively followed by through current-limiting resistance R32, charging capacitor C31, charging resistor R33
Ground；Subsequent stages charging circuit includes current-limiting resistance R36, charging resistor R34 and charging capacitor C32, and VCC is successively through current-limiting resistance
It is grounded after R36, charging capacitor C32, charging resistor R34；The collector of several avalanche transistor switches T32 connects to be filled at n-th grade
Node between the current-limiting resistance R36 and charging capacitor C32 of circuit, after the base stage and emitter of avalanche transistor T32 is shorted
The node between the charging resistor R34 and charging capacitor C32 of (n+1)th grade of charging circuit is connect, the last one avalanche transistor is opened
The base stage and emitter short circuit for closing T32 are followed by one end of load resistance R35, and the other end of load resistance R35 is grounded, and n is big
In 3 natural number.
Avalanche transistor encapsulates FMMT415 using the patch of Zetex company production, when DC power supply is connected, Ge Ji electricity
Hold charging rapidly, before pressing trigger switch S21, each avalanche transistor cut-off, but it has been in critical avalanche condition, Ge Jichong
Capacitor is filled with direct current power source voltage VCC, and when pressing trigger switch S21, isolating transformer allows high frequency trigger signal logical
It crosses, the charging voltage signal of isolated DC power supply, therefore the snowslide triode T31 in input stage circuit is caused to be connected first, this
When, the potential of charging capacitor C31 right end is equal to the potential of the left end charging capacitor C32, supply voltage VCC is equal to, due to capacitor
The voltage at both ends will not be mutated, and therefore, the moment potential of 2 times of VCC can be obtained in charging capacitor C32 right end, and this moment is electric
Gesture is added between the collector and emitting stage of first avalanche transistor switch T32, so that avalanche transistor switch T32 is avenged
Breakdown is collapsed, and so on, all avalanche transistors switch whole snowslide conductings, at this point, charging capacitor at different levels is equivalent to series connection, by
Charging capacitor C31 of the emitter of avalanche transistor in afterbody charge-discharge circuit over the ground, in first order charge-discharge circuit
Left end discharge over the ground, respectively on charging resistor R33 and load resistance R35 obtain output voltage be several times as much as DC power supply electricity
The positive and negative pulse of pressure, in theory, multiple is exactly the half of capacitor number, and actual circuit all exists to a certain degree
Loss, efficiency is generally extremely difficult to 100%.
The ground of one end connection trigger circuit of isolating transformer, realizes trigger circuit and Marx circuit altogether, avoids
The skimble-scamble factor of current potential leads to triggering certainly for Marx circuit, ensure that the stability of triggering.All switching devices are all made of
The avalanche transistor FMMT415 of patch encapsulation.It is found by pre-stage test, novel avalanche transistor is a kind of more satisfactory
The device of quick response and very big peak power can be provided simultaneously, switch conduction times can be made to obtain using its avalanche effect
Greatly shorten, it is more preferable than the stability of FMMT417 and consistency；In addition, reducing the volume of clock using patch encapsulation.
The method of isolating transformer is installed in the triggering input terminal of Marx circuit to realize that totally, isolating transformer is to direct current
Charging voltage be isolation, but the trigger signal of high frequency can be passed through, to realize trigger circuit and charging electricity
Road totally.The isolating transformer has selected the radio-frequency transformer of mini company, since trigger circuit exports rising edge of a pulse
Suddenly, frequency is higher, therefore has selected the patch radio-frequency transformer of model ADT1-1, and working frequency arrives for 0.1MHz
400MHz can make the avalanche transistor in the undistorted triggering first order charge-discharge circuit of trigger signal.
The trigger circuit uses second level trigger circuit, improves the driving capability of trigger circuit and the stabilization of triggering
Property.First order trigger circuit is made of 555 timers, 74LS123 shaping circuit and peripheral circuit, and output signal is pulsewidth us
Grade, the signal that amplitude is 5V, are the input signal of second level trigger circuit, second level trigger circuit is by avalanche transistor
MMBT3904 and peripheral circuit composition, export the sharp pulse signal that a voltage is 50V, pulse front edge is 5ns, are made by the pulse
For the trigger signal of Marx impulse circuit, the stability of the load driving capability and triggering when triggering can be improved.
The voltage value of DC power supply is 250V.It is found according to the test of early period, avalanche transistor is 250V in supply voltage
When, turn-on effect is best.It is described in order to reduce the influence of external electromagnetic interference source and high-voltage DC power supply to clock
Marx snowslide circuit is placed in shielding box, circuit ground effect can be made more preferable in this way, and waveform is more smooth, and repeatability is more
It is good.
To sum up, the output pulse polarity of the generating device is optional, small in size, triggering stability is high.
Claims (4)
1. a kind of pouring-in bipolarity two fingers number electromagnetic pulse generating device, it is characterised in that: including DC power supply, triggering electricity
Road, isolating transformer and Marx circuit, the output end of the DC power supply electricity with the trigger circuit and Marx circuit respectively
The output end of the connection of source input terminal, the trigger circuit connects through the signal input part of the isolating transformer and the Marx circuit
It connects, the output end of the Marx circuit is the pulse signal output end of the pulse generating unit；
The ground of one end connection trigger circuit of isolating transformer, trigger circuit pass through isolating transformer and Marx circuit altogether；
The Marx circuit includes input stage circuit, several grades of charge-discharge circuits, several avalanche transistor switch T32 and load
Resistance R35, the input stage circuit include primary avalanche transistor switch T31, isolating transformer U4 and current-limiting resistance R31, touching
The output end of Power Generation Road is connect with an input terminal of the isolating transformer U4 primary, primary another of isolating transformer U4
Input end grounding, the secondary both ends of isolating transformer U4 connect the base stage and emitter in primary avalanche transistor switch T31 respectively,
Current-limiting resistance R31 is connected in parallel on the secondary both ends of isolating transformer U4；First order charge-discharge circuit includes current-limiting resistance R32, charging
Resistance R33 and charging capacitor C31, VCC are successively grounded after current-limiting resistance R32, charging capacitor C31, charging resistor R33；It is subsequent
Charge-discharge circuits at different levels include current-limiting resistance R36, charging resistor R34 and charging capacitor C32, VCC successively through current-limiting resistance R36,
It is grounded after charging capacitor C32, charging resistor R34；The collector of several avalanche transistor switches T32 connects in n-th grade of charge and discharge
Node between the current-limiting resistance R36 and charging capacitor C32 of circuit, base stage and the emitter short circuit of avalanche transistor T32 are followed by
Node between the charging resistor R34 and charging capacitor C32 of (n+1)th grade of charge-discharge circuit, the last one avalanche transistor are opened
The base stage and emitter short circuit for closing T32 are followed by one end of load resistance R35, and the other end of load resistance R35 is grounded, and n is big
In 3 natural number.
2. pouring-in bipolarity two fingers number electromagnetic pulse generating device as described in claim 1, it is characterised in that: the direct current
Power supply includes transformer U1, capacitor C11-C15 and diode D11-D14, and the input of transformer U1 terminates alternating current, transformer U1
An output end connect with one end of capacitor C11, the other end of capacitor C11 connects through the cathode of capacitor C13 and diode D14
It connects, the anode of diode D14 is successively connect after capacitor C14, capacitor C12 with the another output of transformer U1, diode
The anode of D11 and the cathode of diode D12 connect the node of capacitor C11 Yu capacitor C13, and the cathode of diode D11 meets capacitor C12
With the node of transformer U1, the anode of diode D12 and the cathode of diode D13 connect the node of capacitor C12 Yu capacitor C14,
The node of transformer U1 and capacitor C12 is the cathode output end of the DC power supply, and capacitor C14 and the node of diode D14 are
The cathode output end of the DC power supply, the capacitor C15 are connected in parallel on the output end of the DC power supply.
3. pouring-in bipolarity two fingers number electromagnetic pulse generating device as described in claim 1, it is characterised in that: the triggering
Circuit includes first order trigger circuit and second level trigger circuit, the first order trigger circuit include NE555 timer U2 and
Shaping chip U3, the U3 use 74LS123, and 1 foot of the U2 is grounded, and 2 feet of the U2 are divided into two-way, and the first via is through resistance
R21 connects power supply, the triggered switch S21 ground connection in the second tunnel；3 feet of the U2 are connect with 2 feet of the U3；4 feet of the U2 connect
Power supply；The 5 foot meridian capacitor C21 of the U2 are grounded；6 feet of the U2 are divided into three tunnels, and the first via is grounded through capacitor C22, the second tunnel
Power supply is connect through resistance R22, third road is connect with 7 feet of the U2；8 feet of the U2 connect power supply；1 foot of the U3 is grounded；Institute
3 feet for stating U3 connect power supply；It is divided into two-way after the 14 foot meridian capacitor C23 of the U3, the first via is connect with 15 feet of the U3, and second
Road connects power supply through resistance R23；It is divided into two-way after the 13 foot meridian capacitor C24 of the U3, the first via is the first order trigger circuit
Output end, the second tunnel is grounded through resistance R24, other pin floating of the U3；
The second level trigger circuit includes triode Q21, the output end of the first order trigger circuit and second level triggering electricity
The input terminal on road connects, and the input terminal of the second level trigger circuit is divided into two-way, and the first via is followed by through backward dioded D21
Ground, the second tunnel are connect with the base stage of triode Q21, and the emitter ground connection of triode Q21, the collector of triode Q21 is divided into two
Road, the first via are followed by power supply through resistance R25, and the second tunnel is connect with one end of capacitor C25, and the other end of capacitor C25 is divided into two-way,
The first via is grounded through capacitor C26, and the second tunnel is grounded through resistance R26, and the node of the capacitor C25 and resistance R26 are the triggering
The signal output end of circuit.
4. pouring-in bipolarity two fingers number electromagnetic pulse generating device as described in claim 1, it is characterised in that: the Marx
Circuit, isolating transformer and trigger circuit are located in shielding box.
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| CN201610203199.7A CN105610414B (en) | 2016-04-01 | 2016-04-01 | Pouring-in bipolarity two fingers number electromagnetic pulse generating device |
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| CN107643481A (en) * | 2017-10-31 | 2018-01-30 | 天津大学 | A kind of inexpensive electromagnetism fault injection experiment platform and experimental method |
| CN108471254B (en) * | 2018-04-18 | 2020-07-28 | 重庆大学 | Modularized solid microsecond pulse generator for simulating saturation reactor insulation electric stress |
| CN108599740A (en) * | 2018-04-28 | 2018-09-28 | 深圳大学 | Impulse generator |
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| US5216695A (en) * | 1991-06-14 | 1993-06-01 | Anro Engineering, Inc. | Short pulse microwave source with a high prf and low power drain |
| CN102983773A (en) * | 2012-11-23 | 2013-03-20 | 中国人民解放军国防科学技术大学 | All-solid-state Marx generator with saturable pulse transformer substituting for gas switch |
| CN105334361A (en) * | 2015-11-26 | 2016-02-17 | 云南电网有限责任公司电力科学研究院 | All-solid-state nanosecond pulse generation system |
| CN205453649U (en) * | 2016-04-01 | 2016-08-10 | 中国人民解放军军械工程学院 | Two digital circuit magnetism pulse generator that indicate of injection type bipolarity |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5216695A (en) * | 1991-06-14 | 1993-06-01 | Anro Engineering, Inc. | Short pulse microwave source with a high prf and low power drain |
| CN102983773A (en) * | 2012-11-23 | 2013-03-20 | 中国人民解放军国防科学技术大学 | All-solid-state Marx generator with saturable pulse transformer substituting for gas switch |
| CN105334361A (en) * | 2015-11-26 | 2016-02-17 | 云南电网有限责任公司电力科学研究院 | All-solid-state nanosecond pulse generation system |
| CN205453649U (en) * | 2016-04-01 | 2016-08-10 | 中国人民解放军军械工程学院 | Two digital circuit magnetism pulse generator that indicate of injection type bipolarity |
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