CN101777850A - Combined pulse formation network and method - Google Patents
Combined pulse formation network and method Download PDFInfo
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- CN101777850A CN101777850A CN200910156671A CN200910156671A CN101777850A CN 101777850 A CN101777850 A CN 101777850A CN 200910156671 A CN200910156671 A CN 200910156671A CN 200910156671 A CN200910156671 A CN 200910156671A CN 101777850 A CN101777850 A CN 101777850A
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- 238000000034 method Methods 0.000 title claims abstract description 10
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- 238000004146 energy storage Methods 0.000 claims abstract description 23
- 230000005540 biological transmission Effects 0.000 claims abstract description 16
- 238000006243 chemical reaction Methods 0.000 abstract description 3
- 238000003754 machining Methods 0.000 abstract description 2
- 239000011435 rock Substances 0.000 description 12
- 238000007600 charging Methods 0.000 description 8
- 238000005516 engineering process Methods 0.000 description 8
- 238000005553 drilling Methods 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 102000016938 Catalase Human genes 0.000 description 2
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- 208000006218 bradycardia Diseases 0.000 description 1
- 230000036471 bradycardia Effects 0.000 description 1
- 230000009194 climbing Effects 0.000 description 1
- 239000008367 deionised water Substances 0.000 description 1
- 229910021641 deionized water Inorganic materials 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 238000010894 electron beam technology Methods 0.000 description 1
- 238000013467 fragmentation Methods 0.000 description 1
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Abstract
The invention discloses a combined pulse formation network and a method. The combined pulse formation network mainly comprises a pulse formation line, an energy-storage capacitor, a switch and a pulse transmission line, wherein the connecting relationship thereof is as follows: the output end of the pulse formation line is respectively connected with the high voltage end of the energy-storage capacitor and the anode of the switch; the low voltage of the energy-storage capacitor is grounded; and the cathode of the switch is connected with the input end of the pulse transmission line. The combined pulse formation network can be matched with a variable resistance load, supplies a short pulse high voltage for the load impendence to puncture when the load impedance is high, and supplies a subsequent long pulse for finishing the specific physical machining or chemical reaction on the load when the impedance becomes low. Compared with the conventional high voltage pulse power supply used in the variable impedance load, the combined pulse formation network greatly increases the utilization rate of energy and prolongs the service life of the power supply.
Description
Technical field
The invention belongs to the Pulse Power Techniques field, related in particular to a kind of assembled pulse and formed network.
Background technology
High pulse power technology is to compress fast from room and time by the energy with higher density that " slowly " stored, and changes or directly export to that load realizes.Over nearly 50 years, High pulse power technology develops rapidly noticeable.At present, can generate tens of million electro-volts in a short period of time, up to the strong current electron beam and the ion beam of number megampere magnitude.The present larger pulse power system that uses, its basic principle be at first the formation voltage rise time be that the high pressure Bradycardia of microsecond magnitude dashes, form the fast pulse (rise time of voltage is generally in nanosecond) that system is converted into high-power by power again.
High pulse power technology is in increasingly extensive application, and some new application technologies have proposed new requirement to high power pulsed source.With pulsed plasma catalase technology is example, and the pulse power of this specification requirement provides characteristic impedance diverse potential pulse before and after rock punctures.Specifically, before rock punctured, load needed very short high pressure short pulse of voltage rise time to realize electrical breakdown (pulse rise time＜100ns, voltage climbing speed＞3kV/ns) to rock; After rock punctures, need one section follow-up long pulse the plasma channel that electrical breakdown forms to be heated (pulsewidth need be 200～500ns), and then realize the fragmentation of rock.Briefly, first stage needs power supply that high voltage (little electric current) is provided, and second stage needs power supply that big electric current (low voltage) is provided.Yet, the existing high-voltage pulse power source that is applied to these fields, as the Marx generator, L-C voltage multiplies etc. all are to be both high voltage and big current device are provided simultaneously, when the impedance of load sharply diminishes, a large amount of electrical power all consumes on current-limiting resistance, not only waste a large amount of electric energy, and heating can cause the ablation of electronic device, reduce the useful life of power supply.
Summary of the invention
The object of the invention provides a kind of assembled pulse that is complementary with load impedance and forms network and method.
For achieving the above object, the technical solution used in the present invention is: this assembled pulse forms network and mainly comprises pulse forming line, energy storage capacitor, switch and pulse transmission line, the output of described pulse forming line links to each other with the high-pressure side of energy storage capacitor and the anode of switch respectively, the low-pressure end ground connection of energy storage capacitor, the negative electrode of switch is connected with the input of pulse transmission line.
Further, the present invention also comprises elementary high-voltage pulse charge power supply, and this elementary high-voltage pulse charge power supply links to each other with the input of pulse forming line.
The method that the present invention forms assembled pulse mainly comprises the steps:
(1) utilize elementary high-voltage pulse charge power supply paired pulses formation line and energy storage capacitor to charge;
(2) after pulse forming line and energy storage capacitor were charged to predetermined value, actuating switch generated the high pressure short pulse that equates with voltage magnitude on the energy storage capacitor, and this high pressure short pulse is transferred in the load by pulse transmission line;
(3) decay to a half when described high pressure short pulse, pulse forming line generates follow-up long pulse, and this long pulse to load, forms described assembled pulse through the pulse transmission line thus.
Compared with prior art, major advantage of the present invention is: this pulse shaping spider lines can be implemented in load impedance provides when high high voltage that it is punctured, and provides follow-up long pulse to realize its specific Physical Processing or chemical reaction behind the load impedance step-down.Compare with existing high-voltage pulse power source, the present invention need not add big current-limiting resistance (this current-limiting resistance is in order to weaken the impact of big electric current to the power supply internal components) in existing high-voltage pulse power source in circuit, thereby improved energy utilization efficiency greatly, the life-span of power supply also is greatly improved.This assembled pulse forms the fields such as electric machining that network can be widely used in plasma catalase, material.
Description of drawings
Fig. 1 is the working circuit diagram that a kind of assembled pulse of the present invention forms network;
Fig. 2 is that a kind of assembled pulse of the present invention forms the working circuit diagram of network application when the pulsed plasma drilling technology.
Embodiment
In Fig. 1, the output of elementary high-voltage pulse charge power supply 1 is connected to the input of pulse forming line 2; The output of pulse forming line 2 links to each other with the high-pressure side of energy storage capacitor 4 and the anode of switch 3 respectively, the low-pressure end reliable ground of energy storage capacitor 4, and the negative electrode of switch 3 links to each other with the input of pulse transmission line 5; The output of pulse transmission line 5 links to each other with the work electrode of load 6.
Assembled pulse of the present invention forms pulse forming line 2 in the network and can adopt coaxial cable, dull and stereotyped pulse forming line, manually form any type of pulse shaping of line or other system; Energy storage capacitor 3 is low inductance, the higfh-tension ceramics electric capacity that can repeat to discharge and recharge or the electric capacity of other formation; Switch 4 is low inductance, high pressure resistant and long-life high-current switch.
The method of utilizing combined type pulse of the present invention to form network formation assembled pulse is: elementary high-voltage pulse charge power supply 1 gives pulse forming line 2 and storage capacitor 4 chargings until predetermined value.After charging finishes, action takes place and makes switch 3 conductings in the trigger equipment of switch 3, generate the high pressure short pulse that equates with voltage magnitude on the energy storage capacitor 4, this high pressure short pulse is transferred on the work electrode of load 6 by pulse transmission line 5, load 6 punctures under the effect of short pulse high pressure, and characteristic impedance descends, when short pulse high pressure amplitude attenuation to a half, pulse forming line 2 generates follow-up long pulse to be continued load 6 power supplies are realized its specific Physical Processing or chemical reaction.Through after a while, repeat said process again, reach desired repetition rate.Load 6 is before and after puncturing, characteristic impedance alters a great deal, this combined type pulse forms network and can realize being complementary with the load of this class impedance, compare with the existing high electric field pulse power supply that is applied to this class impedance load, increased substantially energy utilization efficiency and the useful life that has prolonged power supply.
As shown in Figure 2, when assembled pulse of the present invention forms network application in the pulsed plasma drilling technology, elementary high-voltage pulse charge power supply 1 adopts the general lighting power supply of 50Hz, 220V to be powered, the user is according to the requirements set charging voltage and the charge frequency of load, after voltage reaches set point, promptly stop charging, and trigger the thyristor switch conducting, paired pulses forms line 2 and energy storage capacitor 4 chargings (charging voltage is greater than 40kV).In the present embodiment, what switch 3 adopted is from the trigger-type spark switch, the triggering loop of this switch is by triggering inductance 8, triggering electric capacity 9 and triggering resistance 10 and form specifically, its course of work is: trigger electric capacity 9 and energy storage capacitor 4 and be charged to maximum simultaneously, owing to trigger the capacitance of the capacitance of electric capacity 9 much smaller than energy storage capacitor 4, the voltage that triggers on the resistance 10 can fall rapidly, and spark gap 11 punctures under overvoltage.The high pressure short pulse that generates imports pulse transmission line 5 into, and pulse transmission line 5 transfers to the assembled pulse that generates on the work electrode of rock 7.Rock punctures under the effect of high pressure short pulse.Pulse forming line 2 generates follow-up low-voltage long pulse, and (about 20kV, the heating of pulsewidth 300～500ns) article on plasma body passages realizes the microexplosion to rock.Repeat said process, can reach the pulse frequency of hundreds of Hz, thereby realize rapid drilling rock.
Wherein, adopt the performance parameter of associated components to be: the charging voltage 0～100kV of elementary high-voltage pulse charge power supply 7, nominal power 3kW, the output energy of pulse 1～20J is adjustable continuously, and 1～50J is adjustable continuously for the charging repetition rate.
The multistage multi-channel arrester switch that switch 3 triggers for LCR.Triggering inductance 8 sizes is 30nH, and the capacitance that triggers electric capacity 9 is 400pF, and the resistance value that triggers resistance 10 is 1M Ω.
The plasma bit electrode is 3 pairs of needle electrodes, and the high-low pressure electrode spacing is 3mm, and dielectric is selected deionized water (conductivity is less than 1 μ S/cm) for use, and fragmented rock is a sandstone.This assembled pulse forms network operation parameter:
Peak power: 200MW
Voltage peak: 40kV
The rise time of high pressure short pulse:＜30ns
Follow-up long pulse pulsewidth: 300～500ns
Pulse repetition frequency: 50Hz
This system can realize the rapid drilling of rock, the power consumption＜500J/cm of fractured rock
3
Claims (3)
1. an assembled pulse forms network, it is characterized in that: comprise pulse forming line, energy storage capacitor, switch and pulse transmission line, the output of described pulse forming line links to each other with the high-pressure side of energy storage capacitor and the anode of switch respectively, the low-pressure end ground connection of energy storage capacitor, the negative electrode of switch is connected with the input of pulse transmission line.
2. a kind of assembled pulse according to claim 1 forms network, and it is characterized in that: also comprise elementary high-voltage pulse charge power supply, this elementary high-voltage pulse charge power supply links to each other with the input of pulse forming line.
3. a use forms the method for assembled pulse according to the pulse forming network of right 1, it is characterized in that comprising the steps:
(1) utilize elementary high-voltage pulse charge power supply paired pulses formation line and energy storage capacitor to charge;
(2) after pulse forming line and energy storage capacitor were charged to predetermined value, actuating switch generated the high pressure short pulse that equates with voltage magnitude on the energy storage capacitor, and this high pressure short pulse is transferred in the load by pulse transmission line;
(3) decay to a half when described high pressure short pulse, pulse forming line generates follow-up long pulse, and this long pulse to load, forms described assembled pulse through the pulse transmission line thus.
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| Application Number | Priority Date | Filing Date | Title |
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| CN200910156671A CN101777850A (en) | 2009-12-31 | 2009-12-31 | Combined pulse formation network and method |
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| CN200910156671A CN101777850A (en) | 2009-12-31 | 2009-12-31 | Combined pulse formation network and method |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102118117A (en) * | 2010-11-30 | 2011-07-06 | 浙江大学 | Circuit resonance coupling device supplied with power by direc-current base voltage superposition pulse voltage |
| CN102780473A (en) * | 2012-07-31 | 2012-11-14 | 西北核技术研究所 | Repetition rate pulse string generator based on Tesla transformers |
| CN102916680A (en) * | 2012-10-10 | 2013-02-06 | 西安交通大学 | Repetition frequency voltage-multiplying square-wave generator based on magnetic switch |
| CN102931948A (en) * | 2012-08-15 | 2013-02-13 | 西北核技术研究所 | Fast switch and Blumlein line integrated high-pressure subnanosecond impulse source |
| CN105226990A (en) * | 2015-10-29 | 2016-01-06 | 中国工程物理研究院激光聚变研究中心 | A kind of efficient pumping shaping pulse power-supply system and method |
| CN106936330A (en) * | 2017-04-27 | 2017-07-07 | 成都光大电力电子研究所 | A kind of low cost high power long pulse is leapt high and pushes up flat high-voltage pulse power source |
| CN114165211A (en) * | 2021-11-29 | 2022-03-11 | 华中科技大学 | High-voltage pulse drilling operation state monitoring method based on voltage signals |
-
2009
- 2009-12-31 CN CN200910156671A patent/CN101777850A/en active Pending
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102118117A (en) * | 2010-11-30 | 2011-07-06 | 浙江大学 | Circuit resonance coupling device supplied with power by direc-current base voltage superposition pulse voltage |
| CN102118117B (en) * | 2010-11-30 | 2013-11-20 | 浙江大学 | Circuit resonance coupling device supplied with power by direc-current base voltage superposition pulse voltage |
| CN102780473A (en) * | 2012-07-31 | 2012-11-14 | 西北核技术研究所 | Repetition rate pulse string generator based on Tesla transformers |
| CN102780473B (en) * | 2012-07-31 | 2015-06-17 | 西北核技术研究所 | Repetition rate pulse string generator based on Tesla transformers |
| CN102931948B (en) * | 2012-08-15 | 2016-03-23 | 西北核技术研究所 | The high-pressure subnanosecond impulse source that a kind of fast switch is integrated with Blumlein line |
| CN102931948A (en) * | 2012-08-15 | 2013-02-13 | 西北核技术研究所 | Fast switch and Blumlein line integrated high-pressure subnanosecond impulse source |
| CN102916680B (en) * | 2012-10-10 | 2015-08-05 | 西安交通大学 | A kind of multiplication of voltage square-wave generator of the repetition rate based on magnetic switch |
| CN102916680A (en) * | 2012-10-10 | 2013-02-06 | 西安交通大学 | Repetition frequency voltage-multiplying square-wave generator based on magnetic switch |
| CN105226990A (en) * | 2015-10-29 | 2016-01-06 | 中国工程物理研究院激光聚变研究中心 | A kind of efficient pumping shaping pulse power-supply system and method |
| CN106936330A (en) * | 2017-04-27 | 2017-07-07 | 成都光大电力电子研究所 | A kind of low cost high power long pulse is leapt high and pushes up flat high-voltage pulse power source |
| CN106936330B (en) * | 2017-04-27 | 2023-10-03 | 成都光大电力电子研究所 | High-voltage pulse power supply with low cost, high power, long pulse and high top flatness |
| CN114165211A (en) * | 2021-11-29 | 2022-03-11 | 华中科技大学 | High-voltage pulse drilling operation state monitoring method based on voltage signals |
| CN114165211B (en) * | 2021-11-29 | 2024-05-14 | 华中科技大学 | Method for monitoring running state of high-voltage pulse drilling equipment based on voltage signal |
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Application publication date: 20100714 |