CN105226990A - A kind of efficient pumping shaping pulse power-supply system and method - Google Patents
A kind of efficient pumping shaping pulse power-supply system and method Download PDFInfo
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- CN105226990A CN105226990A CN201510724865.7A CN201510724865A CN105226990A CN 105226990 A CN105226990 A CN 105226990A CN 201510724865 A CN201510724865 A CN 201510724865A CN 105226990 A CN105226990 A CN 105226990A
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Abstract
The invention belongs to Pulse Power Techniques and laser technology crossing domain, a kind of efficient pumping shaping pulse power-supply system and method are provided.This power supply integrates charging, energy storage, control, switch, shaping pulse, measures, defencive function of releasing.During normal work; protected location of releasing disconnects; by constant current charger, preset energy is charged to Capacitor banks; the controlled conducting of switch; the recurrent network that energy forms via capacitor and inductor, switch, low-loss transmission cable, xenon flash lamp discharge, and form the pumping pulse of big current square wave, and excitation xenon lamp carries out the conversion of efficient electric light energy; and then pumping laser medium realizes population reversion, completes laser amplification procedure.This power supply has that electric current is large, pumping efficiency is high, controllability is strong, long service life, safety and reliability high.
Description
Technical field
The invention belongs to Pulse Power Techniques and laser technology crossing domain, be specifically related to a kind of efficient pumping shaping pulse power-supply system and method.
Background technology
Seed light, by the technology such as laser amplifier, optical shaping, is enlarged into the superlaser of energy up to thousands of Jiao by high power solid-state laser device, and the energy amplification in this process is completed jointly by prime amplifier system and main amplifier system.Energy resource system as the key components of laser aid, for amplifier provides the electric pulse pump energy of coupling, the shape of pulse, amplitude and be synchronously the key factor of the whole laser aid amplifier pumping efficiency of impact and gain.
No matter the construction target of high power solid-state laser device realizes laser-produced fusion or for physical study, improving system-wide energy efficiency is all one of emphasis demand, and this just requires to improve amplifier energy resource system to improve Energy Transfer and conversion efficiency.
Amplifier energy resource system generally adopts the critical damping pulse power both at home and abroad at present, be specially the electric capacity of lumped parameter, inductance, resistance and there is the xenon lamp composition strand LRC discharge loop of non-linear impedance characteristic, by parameter matching, realize critical damping pulse and export.This loop has the advantages that structure is simple, component number is few, but there is duration of wave tail, and capacity usage ratio is low, can aggravate the defects such as the thermal effect of amplifier.
For lamp pump amplifier, desirable pumping current waveform is the flattened Gaussian beam that an afterbody ends fast, (100 μ s) is comparatively delayed in forward position simultaneously, the gain maximum moment is positioned at pumping finish time, and capacity usage ratio is close to 100%, and comparatively critical damping pulse is high in gain.The present invention is based on this understanding to design, do not reduce the reliability requirement of equipment simultaneously in the design process, and take into account the consideration fail safe of lifting means and the trouble diagnosibility of operability and system.
Summary of the invention
The invention provides a kind of efficient pumping shaping pulse power-supply system and method, its technical scheme is as follows:
A kind of efficient pumping shaping pulse power-supply system, it comprises capacitor and inductor recurrent network and comprises the charging energy-storing loop of described capacitor and inductor recurrent network, shaping pulse discharge loop, wherein:
Described capacitor and inductor recurrent network is made up of pulsed capacitance C1 ~ Cn, controllable impedance L1 ~ Ln series-parallel connection;
Described charging energy-storing loop is in series successively by constant current charger M, isolating transformer T, charge protection resistance R1, capacitor and inductor recurrent network;
Described shaping pulse discharge loop is in series successively by capacitor and inductor recurrent network, discharge switch G, long range propagation cable TL, high power xenon flashlamp FL.
Further, described constant current charger M exports the former limit of termination isolating transformer T, and the secondary of isolating transformer T, by charge protection resistance R1, is connected to electric capacity C1 two ends.
Preferably, described discharge switch G arranges switch trigger ST.
Further, the high-pressure side of described high power xenon flashlamp FL is connected to the heart yearn of long range propagation cable; Low-pressure end is connected to the common ground point of power supply by cable shield.
Further, it is also provided with measuring circuit, and the voltage divider that described measuring circuit is made up of resistance R2, R3, signal transmssion line, data acquisition board DCB are connected in sequence.
In addition, the two ends of the voltage divider of R2, R3 composition are connected respectively to electric capacity C1 two ends.
Further, it is also provided with protected location of releasing, described in release protected location by normally closed K switch of releasing, high-power bleeder resistance pile Rs be in series.
Further, described normally closed release K switch and bleeder resistance connection in series-parallel are combined the protected location two ends of releasing that Rs forms and are connected respectively to electric capacity C1 two ends.
A using method for efficient pumping shaping pulse power-supply system, carry out according to the following steps:
S1: the normally closed K switch of releasing of protected location of releasing is disconnected;
S2: start constant current charger M and charge to capacitor and inductor recurrent network;
S3: the data acquisition board DCB Real-Time Monitoring charging voltage value of measuring circuit in charging process;
S4: reach set point when monitoring charging voltage, control switch trigger ST exports pulse, conducting discharge switch G, energy discharges via shaping pulse discharge loop, produce the pumping pulse of big current square wave, excitation high power xenon flashlamp FL carries out the conversion of efficient electric light energy, and then pumping laser medium realizes population reversion, completes laser amplification procedure.
Wherein, in step S4, if discharge switch G does not trigger successfully, or in step s 2, because fault causes to be charged to setting voltage at the appointed time, the normally closed K switch of releasing of protected location of releasing closes, the energy storage of vent discharge container.
Beneficial effect of the present invention is as follows:
The first, the present invention adopts square-wave pulse pumping laser device amplifier, relatively traditional critical damping pulse pump mode, effectively improves pump energy utilance, improves amplifier small signal gain, step-down amplifier thermal effect;
The second, capacitor and inductor composition recurrent network in inductance value at different levels adjustable, can obtain more optimize, satisfactory current pulse shape;
Three, the present invention adopts normally closed switch of releasing, and Real-Time Monitoring also forms closed loop feedback, effectively improves energy security, reliability and trouble diagnosibility.
Four, the present invention can obtain reliable and stable, the economical and practical efficient pumping pulse power, for the large power solid laser device amplifier energy provides new selection, when amplifier gain demand improves, the requirement for laser medium and body structure etc. and pressure effectively can be reduced.
Accompanying drawing explanation
Fig. 1 is a kind of efficient pumping shaping pulse power system circuit structural representation.
Fig. 2 be energy storage identical time, the discharge waveform obtained in the specific embodiment of the invention 1 and critical damping comparison of wave shape figure.
When Fig. 3 is for the square wave shown in employing Fig. 2 and the pumping of critical damping ripple, amplifier sequential-gain curve comparison diagram.
Symbol description in figure:
T: isolating transformer; R1: charge protection resistance; R2, R3: divider resistance; K: normally closed switch of releasing; Rs: bleeder resistance is piled; C1 ~ Cn: pulsed capacitance; L1 ~ Ln: controllable impedance; G: discharge switch; OSC: oscilloscope; TL: long distance low-loss transmission cable; FL: high power xenon flashlamp; DCB: data acquisition board; M: constant current charger M; ST: switch trigger.
Embodiment
Below in conjunction with the embodiment of the present invention, be clearly and completely described the technical scheme in the embodiment of the present invention, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
With reference to Fig. 1; a high-efficiency pulse shaping power supply for pump energy is provided to high power solid-state laser device amplifier, comprises: a charging energy-storing loop, a shaping pulse discharge loop, a switch trigger ST, measuring circuit, an a set of protected location of releasing.
Charging energy-storing loop is in series successively by constant current charger M, isolating transformer (containing high voltage silicon stack) T, protective resistance R1, pulse capacitor group C1 ~ Cn;
The recurrent network that shaping pulse discharge loop is made up of capacitor and inductor series-parallel connection, discharge switch G, long range propagation cable TL, high power xenon flashlamp FL are in series successively; In this loop, oscilloscope OSC is preferably set, for measuring discharge loop current waveform.
The voltage divider that measuring circuit is made up of R2, R3, signal transmssion line, data acquisition board DCB are connected in sequence;
Protected location of releasing is piled Rs by normally closed K switch of releasing, high-power bleeder resistance and is in series.
Constant current charger M exports the former limit of termination isolating transformer (containing high voltage silicon stack) T, and the secondary of isolating transformer (containing high voltage silicon stack) T, by charge protection resistance, is connected to electric capacity C1 two ends; The two ends of the voltage divider of R2, R3 composition are connected respectively to electric capacity C1 two ends; Normally closed release K switch and bleeder resistance connection in series-parallel are combined the protected location two ends of releasing that Rs forms and are connected respectively to electric capacity C1 two ends.
Xenon flash lamp FL high-pressure side is connected to the heart yearn of long range propagation cable; Low-pressure end is connected to the common ground point of power supply by cable shield.
When one of the present invention efficient pumping shaping pulse power-supply system uses, carry out according to the following steps:
S1: the normally closed K switch of releasing of protected location of releasing is disconnected;
S2: start constant current charger M and charge to capacitor and inductor recurrent network;
S3: the data acquisition board DCB Real-Time Monitoring charging voltage value of measuring circuit in charging process;
S4: reach set point when monitoring charging voltage, control switch trigger ST exports pulse, conducting discharge switch G, energy discharges via shaping pulse discharge loop, produce the pumping pulse of big current square wave, excitation high power xenon flashlamp FL carries out the conversion of efficient electric light energy, and then pumping laser medium realizes population reversion, completes laser amplification procedure.
Wherein, in step S4, if discharge switch G does not trigger successfully, or in step s 2, because fault causes to be charged to setting voltage at the appointed time, the normally closed K switch of releasing of protected location of releasing closes, the energy storage of vent discharge container.
Embodiment 1:
In the present embodiment, constant current charger constant output 100mA electric current; The recurrent network n=6 of capacitor and inductor composition, namely has 6 grades of capacitor and inductor unit; Electric capacity is the metalized film self healing capacitor of 6 withstand voltage 20kV, and the life-span can reach 20,000 discharge and recharges; Controllable impedance is adjustable in 64 μ F (1 ± 50%) scopes respectively; Adopt ignitron as discharge switch G; Low-loss transmission cable is about 50m, and D.C. resistance is lower than 1m Ω/km.
In the present embodiment, a kind of specific works process of efficient pumping shaping pulse power-supply system is:
Normally closed release K switch and bleeder resistance are piled the protected location of releasing that Rs forms and are disconnected the connection with major loop, by constant current charger by isolating transformer (containing high voltage silicon stack) T and charge protection resistance R1, charge to pulse capacitor group C1 ~ Cn and voltage is set, divider resistance R2, the voltage divider of R3 tandem compound measures charging voltage value in real time, be sent to data acquisition board analysis, comparison and feedback, value is reached when monitoring charging voltage, control switch trigger exports high-voltage pulse conducting discharge switch G, energy is via electric capacity C1 ~ Cn, the recurrent network that inductance L 1 ~ Ln forms, discharge switch G, long range propagation cable TL, the shaping pulse discharge loop release that high power xenon flashlamp is in series successively, produce total duration about 400 μ s, peak value is about the big current square wave pumping pulse of 5kA, excitation xenon lamp carries out the conversion of efficient electric light energy, and then pumping laser medium realizes population reversion, complete laser amplification procedure.If occur, discharge switch such as not to trigger at the fault state, and protected location of releasing closes at once, complete vent discharge container energy storage within 1min.Oscilloscope OSC measures discharge loop current waveform in real time.
Shown in Fig. 2, for energy storage identical time, the discharge waveform that the present embodiment 1 obtains and critical damping comparison of wave shape figure.When Figure 3 shows that the square wave shown in Fig. 2 and the pumping of critical damping ripple, amplifier sequential-gain curve comparison diagram.Through experiment, under identical systems energy storage, the critical damping pulse power that the present embodiment power supply is relatively traditional, pumping gain factor improves 8.9%, and small signal gain coefficient improves 3.2%, Be very effective.
In addition, be to be understood that, although this specification is described according to execution mode, but not each execution mode only comprises an independently technical scheme, this narrating mode of specification is only for clarity sake, those skilled in the art should by specification integrally, and the technical scheme in each embodiment also through appropriately combined, can form other execution modes that it will be appreciated by those skilled in the art that.
Claims (10)
1. an efficient pumping shaping pulse power-supply system, is characterized in that: it comprises capacitor and inductor recurrent network and comprises the charging energy-storing loop of described capacitor and inductor recurrent network, shaping pulse discharge loop, wherein:
Described capacitor and inductor recurrent network is made up of pulsed capacitance C1 ~ Cn, controllable impedance L1 ~ Ln series-parallel connection;
Described charging energy-storing loop is in series successively by constant current charger M, isolating transformer T, charge protection resistance R1, capacitor and inductor recurrent network;
Described shaping pulse discharge loop is in series successively by capacitor and inductor recurrent network, discharge switch G, long range propagation cable TL, high power xenon flashlamp FL.
2. one according to claim 1 efficient pumping shaping pulse power-supply system, is characterized in that: described constant current charger M exports the former limit of termination isolating transformer T, and the secondary of isolating transformer T, by charge protection resistance R1, is connected to electric capacity C1 two ends.
3. one according to claim 1 efficient pumping shaping pulse power-supply system, is characterized in that: described discharge switch G arranges switch trigger ST.
4. one according to claim 1 efficient pumping shaping pulse power-supply system, is characterized in that: the high-pressure side of described high power xenon flashlamp FL is connected to the heart yearn of long range propagation cable; Low-pressure end is connected to the common ground point of power supply by cable shield.
5. one according to claim 1 efficient pumping shaping pulse power-supply system, is characterized in that: it is also provided with measuring circuit, and the voltage divider that described measuring circuit is made up of resistance R2, R3, signal transmssion line, data acquisition board DCB are connected in sequence.
6. one according to claim 5 efficient pumping shaping pulse power-supply system, is characterized in that: the two ends of the voltage divider of R2, R3 composition are connected respectively to electric capacity C1 two ends.
7. one according to claim 1 efficient pumping shaping pulse power-supply system, is characterized in that: it is also provided with protected location of releasing, described in release protected location by normally closed K switch of releasing, high-power bleeder resistance pile Rs be in series.
8. one according to claim 7 efficient pumping shaping pulse power-supply system, is characterized in that: described normally closed release K switch and bleeder resistance connection in series-parallel are combined the protected location two ends of releasing that Rs forms and be connected respectively to electric capacity C1 two ends.
9. a using method for efficient pumping shaping pulse power-supply system, is characterized in that: carry out according to the following steps:
S1: the normally closed K switch of releasing of protected location of releasing is disconnected;
S2: start constant current charger M and charge to capacitor and inductor recurrent network;
S3: the data acquisition board DCB Real-Time Monitoring charging voltage value of measuring circuit in charging process;
S4: reach set point when monitoring charging voltage, control switch trigger ST exports pulse, conducting discharge switch G, energy discharges via shaping pulse discharge loop, produce the pumping pulse of big current square wave, excitation high power xenon flashlamp FL carries out the conversion of efficient electric light energy, and then pumping laser medium realizes population reversion, completes laser amplification procedure.
10. the using method of a kind of efficient pumping shaping pulse power-supply system according to claim 9; it is characterized in that: in step S4; if discharge switch G does not trigger successfully; or in step s 2; because fault causes to be charged to setting voltage at the appointed time; protected location normally closed of releasing K switch of releasing closes, the energy storage of vent discharge container.
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| CN106329300A (en) * | 2016-08-22 | 2017-01-11 | 大族激光科技产业集团股份有限公司 | Lamp pump laser and light on method and device thereof |
| CN110368594A (en) * | 2019-06-26 | 2019-10-25 | 木马电器科技(东莞)有限责任公司 | A kind of hand-held light nti-freckle equipment and nti-freckle method |
| CN110620570A (en) * | 2019-09-24 | 2019-12-27 | 中国工程物理研究院激光聚变研究中心 | Low-jitter pulse width high-resolution adjustable square wave pulse generation system and method |
| CN112922568A (en) * | 2021-01-18 | 2021-06-08 | 中石化石油工程技术服务有限公司 | Portable perforation ignition system |
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Inventor after: Qi Zhen Inventor after: Dang Zhao Inventor after: Zhu Qihua Inventor after: Wei Xiaofeng Inventor after: Chen Dehuai Inventor after: Shen Chen Inventor after: Guo Liangfu Inventor after: Lai Guiyou Inventor after: Chen Lin Inventor after: Tang Haibo Inventor after: Wang Lingfang Inventor after: Tang Ling Inventor before: Qi Zhen |
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