CN108880512A - A kind of high power Double exponential pulse pulsewidth continuously adjusts circuit and adjusting method - Google Patents
A kind of high power Double exponential pulse pulsewidth continuously adjusts circuit and adjusting method Download PDFInfo
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- CN108880512A CN108880512A CN201810652885.1A CN201810652885A CN108880512A CN 108880512 A CN108880512 A CN 108880512A CN 201810652885 A CN201810652885 A CN 201810652885A CN 108880512 A CN108880512 A CN 108880512A
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Classifications
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K7/00—Modulating pulses with a continuously-variable modulating signal
- H03K7/08—Duration or width modulation ; Duty cycle modulation
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes
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Abstract
The present invention relates to a kind of high power Double exponential pulse pulsewidths to continuously adjust circuit and adjusting method, and the present invention not only improves pulse width modulation range and flexibility, and has also widened the application range of pulse power.Its circuit structure includes Marx circuit, middle storage road, peaking circuit and load resistance；Its improvements is：It further include Chop circuit；The Chop circuit includes Chop switch, Chop switch trigger and Chop resistance；In parallel with the middle storage appearance in middle storage road after Chop switch and the series connection of Chop resistance, the output end of the Chop switch trigger is connect with the trigger electrode of triggering Chop switch, resistance value≤load resistance resistance value of the Chop resistance.
Description
Technical field
The present invention relates to pulsewidths to continuously adjust technology, and in particular to a kind of high power Double exponential pulse pulsewidth continuously adjusts electricity
Road and adjusting method.
Background technique
Pulse Power Techniques are to compress in time scale to energy, to obtain high power pulse.Before obtaining fastly
Along pulse, generally use two stages of compression circuit to realize, that is, by Marx circuit, middle storage road and peaking circuit compress come
It realizes.
When the middle storage of two stages of compression circuit is held and load impedance determines, the width parameter for exporting pulse is also determined.It is defeated
The width of pulse is held by middle storage out size and load impedance size determines that pulse width can be held big by storage in replacement
It is small to adjust, but the adjustable range for the mode pulse-width that pulse-width is adjusted in such a way that storage in replacement is held
It is limited, and precision is not high.
Summary of the invention
In order to solve the problems in background technique, the present invention is directed to existing fast rise time high power Double exponential pulse generation circuit
Pulse-width regulated is limited in scope, and the problem that degree of regulation is not high, proposes a kind of high power Double exponential pulse pulsewidth and continuously adjusts
Circuit and adjusting method, that pulse power has also been widened while improving pulse width modulation range and flexibility applies model
It encloses.
Basic principle of the invention is：
Chop circuit is added in the existing two stages of compression circuit, is realized by accurately controlling opening constantly for Chop switch
Export pulse in a certain range continuous accurate adjustable.
The technical solution adopted by the present invention：
The present invention provides a kind of high power Double exponential pulse pulsewidths to continuously adjust circuit, including Marx circuit, middle storage
Road, peaking circuit and load resistance；
It is characterized in that：It further include Chop circuit；The Chop circuit includes Chop switch, Chop switch trigger
And Chop resistance；It is in parallel with the middle storage appearance in middle storage road after Chop switch and the series connection of Chop resistance, the Chop switch
The output end of trigger is connect with the trigger electrode of triggering Chop switch, and the high pressure that trigger electrode receives Chop switch trigger is defeated
Signal out, resistance value≤load resistance resistance value of the Chop resistance.
Further, Chop switch select high pressure ultraviolet preionization multistage gas switch, high pressure ultraviolet preionization it is more
Grade gas switch includes switch main gap and ultraviolet preionization gap composition；It is logical using main gap pulse voltage when switching work
Overcoupling mode obtains preionization voltage in preionization gap, and preionization gap, which first punctures, air ionization in main gap
Initiating electron is imitated, the statistics time delay in switch breakdown process is reduced, and then reaches acceleration switch conducting, reduces switch from fluttering, it should
Switch has many advantages, such as that operating voltage is high, through-current capability is strong, delay jitter is small.
Further, the Marx circuit includes that the Marx capacitor being sequentially connected in series, Marx internal resistance, Marx inductance, Marx are opened
It closes.
Further, middle storage road includes that middle storage is held, middle storage sense and middle storage switch；Middle storage is held and Marx circuit
In parallel and middle storage holds one end ground connection, and the other end sets gradually middle storage sense and middle storage switch；Chop switch in Chop circuit
Storage is held between middle storage sense in the access of one end, and the other end connects with Chop resistance and is followed by ground.
Further, peaking circuit includes peaking capacitor, peaking switch, peaking inductance；Peaking capacitor and middle storage road are simultaneously
Connection, and peaking capacitor, peaking inductance and load resistance switch to form a closed loop by peaking.
The adjusting method that circuit is continuously adjusted based on above-mentioned high power Double exponential pulse pulsewidth, is included the following steps：
【1】When original state, Marx capacitor is started to charge, after charging complete, triggering Marx switch, Marx capacitor by every
From Marx inductance and Marx internal resistance centering storage capacity charge；
【2】When storage capacity charge voltage reaches peak value moment in the middle, switch conduction is stored up in triggering, middle storage appearance passes through middle storage
Inductance gives peaking capacitor CPCharging；
【3】When peaking capacitor voltage, which is equal to middle storage, holds upper voltage, peaking switch conduction；Middle storage appearance, peaking capacitor
It is discharged by load resistance；
【4】When the pulse width of needs be X when, the size of pulse width as needed, Chop switch by with Marx
Trigger signal is synchronised, while calculating the Time delay of Marx trigger signal and Chop switch, and external sync machine accurately controls
The Time delay of Marx trigger signal and Chop switch, holds that middle storage also by Chop conductive discharge, thus on load resistance
The continuously adjustable pulse of a pulsewidth will be obtained.
Further, Marx trigger signal and the specific calculating formula of the Chop Time delay switched are：
T=T1+T2+X；
X=T3-T4
T3=0.69CTRload
T4=0.69CTRloadRchop/(Rload+Rchop)
Wherein, T is the Time delay of Marx trigger signal and Chop switch；
T1To apply high-voltage trigger signal up to the time of Marx circuit output high-voltage pulse；
T2For the time to middle storage capacity charge to peak value of Marx circuit；
T3Hold the pulsewidth discharged by load resistance for middle storage, wherein CTFor the capacitance size that middle storage is held, Rload
For the resistance value of load resistance；
T4Hold the pulsewidth for passing through load resistance and chop conductive discharge for middle storage；RchopFor Chop resistance.
The beneficial effects of the invention are as follows：
It is proposed by the invention to increase Chop circuit design on the basis of existing two stages of compression circuit, it is greatly improved defeated
The adjustable range and flexibility of pulse width out, improves conventional efficient, expands the application field of high power pulse, is promoted high
The application level of power pulse.
Detailed description of the invention
Fig. 1 is the circuit diagram of the embodiment of the present invention.
The waveform diagram that exports when being 150ns that Fig. 2 is the pulse width of the embodiment of the present invention.
The waveform diagram that exports when being 50ns that Fig. 3 is the pulse width of the embodiment of the present invention.
Specific embodiment
The present invention is further described with embodiment with reference to the accompanying drawing.
Embodiment
Chop circuit is added in the present invention in existing two stages of compression circuit, by accurately control Chop switch open the moment
To realize output pulse in a certain range continuous accurate adjustable.
As shown in Figure 1, the circuit includes Marx circuit, middle storage road, peaking circuit, load resistance and Chop circuit；
Marx circuit includes the Marx capacitor C being sequentially connected in seriesMarx, Marx internal resistance RMarx, Marx switch SMarx, Marx inductance
LMarx。
Middle storage road includes that middle storage holds CT, middle storage sense LTAnd middle storage switch ST；Middle storage holds CTSimultaneously with Marx circuit
Connection and middle storage appearance CTOne end ground connection, the other end set gradually middle storage sense LTWith middle storage switch ST；In the access of Chop circuit on one side
Storage holds CTThe L between middle storage senseT, other end ground connection.
Peaking circuit includes peaking capacitor Cp, peaking switch SpAnd peaking inductance Lp；Peaking capacitor CpSimultaneously with middle storage road
Connection, and peaking capacitor Cp, peaking inductance LpAnd load resistance RloadPass through peaking switch SpForm a closed loop.
Chop circuit includes Chop switch SChop, Chop switch trigger Trigger and Chop resistance RChop；Chop electricity
Middle storage in Lu Yuzhong storage road holds CTParallel connection, (specifically：Chop switch SChopStorage holds C in the access of one endTWith middle storage
Feel LTBetween, the other end and Chop resistance RChopBe grounded after series connection) and Chop switch trigger Trigger output end and triggering
Chop switch SChopTrigger electrode connection, trigger electrode receive Chop switch trigger Trigger High voltage output signal,
Chop resistance RChopResistance value≤load resistance RloadResistance value, in the present embodiment：
CMarxAbout 1.5nF；LMarxAbout 100 μ H；, RchopAbout 30 ohm；CpIt is about 150pF, LpAbout 200nH；RloadAbout 120 Europe
Nurse.
Chop switch selects the multistage gas switch of high pressure ultraviolet preionization, the multistage gas switch of high pressure ultraviolet preionization
Including switch main gap and ultraviolet preionization gap composition；When switching work, pass through coupled modes using main gap pulse voltage
Preionization voltage is obtained in preionization gap, preionization gap, which first punctures, makes air ionization generate effectively initial electricity in main gap
Son reduces the statistics time delay in switch breakdown process, and then reaches acceleration switch conducting, reduces switch from fluttering, which has
The advantages that operating voltage is high, through-current capability is strong, delay jitter is small.
Carrying out the method that pulse continuously adjusts using the circuit in the embodiment is：
(1) when original state, Marx capacitor CmarxCharge to certain voltage；After charging complete, S is triggeredmarxSwitch, Marx
Capacitor passes through isolation inductance LmarxWith Marx internal resistance RmarxCentering storage holds CTCharging；
(2) storage holds C inTWhen charging voltage reaches peak value moment, switch S is stored up in triggeringTConducting, middle storage hold CTIt is logical
Cross middle storage sense LTGive peaking capacitor CPCharging；
(3) as peaking capacitor CPVoltage is equal to middle storage and holds CTWhen upper voltage, peaking switch SPConducting, middle storage hold CT, peak
Change capacitor CPPass through load resistance RloadElectric discharge, the peaking inductance peak of the Double exponential pulse forward position of output mainly due to peaking circuit
Change capacitor LPIt determines, along the capacitor C by middle storage circuit after the Double exponential pulse of outputTWith load resistance RloadIt determines；
(4) when the pulse width of needs is X, the size of pulse width as needed,
Chop switch SChopBy being synchronised with Marx trigger signal, while calculating Marx trigger signal and Chop switch
SChopTime delay, external sync machine accurately controls Marx trigger signal and Chop switch SChopTime delay, make middle storage
Hold CTAlso by Chop resistance RChopElectric discharge, thus load resistance RloadOn will obtain the continuously adjustable pulse of a pulsewidth.
Marx trigger signal and Chop switch SChopThe specific calculating formula of Time delay be：
T=T1+T2+X；
X=T3-T4
T3=0.69CTRload
T4=0.69CTRloadRchop/(Rload+Rchop)
Wherein, T is Marx trigger signal and Chop switch SChopTime delay；
T1To apply high-voltage trigger signal up to the time of Marx circuit output high-voltage pulse；
T2For the time to middle storage capacity charge to peak value of Marx circuit；
T3Hold C for middle storageTPass through the pulsewidth of load resistance, wherein CTFor the capacitance size that middle storage is held, RloadFor
The resistance value of load resistance；
T4Hold the pulsewidth for passing through load resistance and chop conductive discharge for middle storage；RchopFor Chop resistance.
In real process, due to 0≤Rchop≤Rload, R is adjusted within the above rangechopAccurate X is obtained, to obtain
T。
Fig. 2 is the continuously adjustable Double exponential pulse production method output waveform of the typical pulsewidth of the embodiment of the present invention, is led to
Oversampling circuit analog result confirms the feasibility of this method.Wherein, output pulse width is typical pulsewidth 150ns such as Fig. 2, pulsewidth
50ns such as Fig. 3.It is accurate to control by using the Chop circuit by Fig. 2 and Fig. 3 it is found that under conditions of output phase is with voltage
Regulatory function may be implemented in Marx triggering system and Chop circuit time delay.
Specification of the invention gives sufficient explanation to summary of the invention, and the design parameter of each component can basis
Actual demand setting, the content that those of ordinary skill is enough specification through the invention are implemented.In the frame of claim
Under, any improvement based on thinking of the present invention belongs to interest field of the invention.
Claims (7)
1. a kind of high power Double exponential pulse pulsewidth continuously adjusts circuit, including Marx circuit, middle storage road, peaking circuit and
Load resistance；It is characterized in that：
It further include Chop circuit；The Chop circuit includes Chop switch, Chop switch trigger and Chop resistance；Chop is opened
, the output end of the Chop switch trigger and triggering in parallel with the middle storage appearance in middle storage road behind pass and the series connection of Chop resistance
The trigger electrode connection of Chop switch, resistance value≤load resistance resistance value of the Chop resistance.
2. high power Double exponential pulse pulsewidth according to claim 1 continuously adjusts circuit, it is characterised in that：The Chop
Switch selects the multistage gas switch of high pressure ultraviolet preionization, and the multistage gas switch of high pressure ultraviolet preionization is by switch main gap
It is formed with ultraviolet preionization gap.
3. high power Double exponential pulse pulsewidth according to claim 2 continuously adjusts circuit, it is characterised in that：The Marx
Circuit includes the Marx capacitor being sequentially connected in series, Marx internal resistance, Marx inductance, Marx switch.
4. high power Double exponential pulse pulsewidth according to claim 3 continuously adjusts circuit, it is characterised in that：Middle storage road
Hold including middle storage, middle storage sense and middle storage switch；Middle storage, which is held, holds one end ground connection with Marx circuit in parallel and middle storage, separately
One end sets gradually middle storage sense and middle storage switch；Chop in Chop circuit, which switchs storage in the access of one end, to be held and middle storage sense
Between, the other end connects with Chop resistance and is followed by ground.
5. high power Double exponential pulse pulsewidth according to claim 4 continuously adjusts circuit, it is characterised in that：Peaking circuit
Including peaking capacitor, peaking switch, peaking inductance；Peaking capacitor and middle storage circuit in parallel, and peaking capacitor, peaking inductance and
Load resistance switchs to form a closed loop by peaking.
6. continuously adjusting the adjusting of circuit based on high power Double exponential pulse pulsewidth described in claim 1-5 any claim
Method, which is characterized in that include the following steps：
【1】When original state, Marx capacitor is started to charge, and after charging complete, triggering Marx switch, Marx capacitor passes through Marx electricity
Sense and Marx internal resistance centering storage capacity charge；
【2】When storage capacity charge voltage reaches peak value moment in the middle, switch conduction is stored up in triggering, middle storage appearance passes through middle storage sense
Give peaking capacitor CPCharging；
【3】When peaking capacitor voltage, which is equal to middle storage, holds upper voltage, peaking switch conduction；Middle storage is held, peaking capacitor passes through
Load resistance electric discharge；
【4】When the pulse width of needs is X, the size of pulse width as needed, Chop is switched by triggering with Marx
Signal is synchronised, while calculating the Time delay of Marx trigger signal and Chop switch, and external sync machine accurately controls Marx touching
It signals to hold that middle storage also by Chop conductive discharge, to will obtain on load resistance with the Time delay of Chop switch
Obtain the continuously adjustable pulse of a pulsewidth.
7. high power Double exponential pulse pulsewidth method for continuously adjusting according to claim 6, it is characterised in that：
Marx trigger signal and the specific calculating formula of the Chop Time delay switched are：
T=T1+T2+X；
X=T3-T4
T3=0.69CTRload
T4=0.69CTRloadRchop/(Rload+Rchop)
Wherein, T is the Time delay of Marx trigger signal and Chop switch；
T1To apply high-voltage trigger signal up to the time of Marx circuit output high-voltage pulse；
T2For the time to middle storage capacity charge to peak value of Marx circuit；
T3Hold the pulsewidth discharged by load resistance for middle storage, wherein CTFor the capacitance size that middle storage is held, RloadIt is negative
Carry the resistance value of resistance；
T4Hold the pulsewidth for passing through load resistance and chop conductive discharge for middle storage；RchopFor Chop resistance.
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| CN110380712A (en) * | 2019-07-03 | 2019-10-25 | 西北核技术研究院 | The Pulsed current injection source circuit that Double exponential pulse high current amplitude continuously adjusts |
| CN111721984A (en) * | 2020-05-12 | 2020-09-29 | 西北核技术研究院 | Multi-parameter program-controlled adjustable double-exponential-wave pulse current injection device |
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