CN105227160A - The square wave Linear transformer driver of double-layer coaxial structure - Google Patents
The square wave Linear transformer driver of double-layer coaxial structure Download PDFInfo
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- CN105227160A CN105227160A CN201510600054.6A CN201510600054A CN105227160A CN 105227160 A CN105227160 A CN 105227160A CN 201510600054 A CN201510600054 A CN 201510600054A CN 105227160 A CN105227160 A CN 105227160A
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Abstract
Do you the present invention relates to a kind of Linear transformer driver (Linear? Transformer? Driver, is called for short LTD), comprise from outside to inside coaxial outer discharge module, secondary cylinder and the internal layer discharge module arranged successively; Outer discharge module one end ground connection, the other end connects secondary cylinder, forms outer fundamental frequency loop; Internal layer discharge module one end ground connection, the other end connects secondary cylinder, forms internal layer harmonic wave regulating loop; Secondary cylinder one end ground connection, ground connection after other end connection load, forms outer fundamental frequency loop, internal layer harmonic wave regulating loop common sparing.The square wave Linear transformer driver of coaxial configuration provided by the present invention, its space availability ratio is high, and volume is little, can significantly reduce drive source cost.The present invention adopts inside and outside two-layer discharge module coaxially arranged, and compact conformation, can obtain more high-power output under same volume.
Description
Technical field
The present invention relates to a kind of Linear transformer driver (LinearTransformerDriver is called for short LTD).
Background technology
Fast pulse Linear transformer driver (FLTD) directly can export the fast rise time high power pulse of hundred nanoseconds without the need to pulse compression, compared to traditional pulse power supply, there is the advantages such as compacter, modularization, cost are low, obtained develop rapidly in nearly ten years.Current FLTD technology has become the technology path of the prioritizing selection of drive source in the research fields such as Z constriction inertial confinement fusion (ICF), spark photograph, excimer laser.U.S. SNL proposes the FLTD drive source conceptual design of electric current 60MA in Z constriction fusion energy resource project; The spark photograph that SNL and French CE A cooperate study in drive source also adopt FLTD technology; FLTD technology is successfully applied to XeF excimer laser by Russia HCEI.
FLTD, by the synchronous discharge in parallel of radial evenly distributed multiple discharge paths, utilizes electromagnetic coupled, and realize the multiple branch current superposition of single-stage and Multi-stage module voltage superposition, its output waveform determines, in sinusoidal decay shape primarily of the inductance capacitance of single branch road.And in other research fields such as spark photograph and excimer laser, more wish that the output waveform of drive source is square wave, namely fast rising front and smooth flat-top.The people such as the A.A.KIM of Russia HCEI propose based on square wave Fourier series theory, be incorporated to the method that triple-frequency harmonics discharge paths realizes quasi-square wave pulse output, and carried out preliminary experiment checking in former LTD module.FLTD single module regulates branch road to form by 4 standard discharge paths and 2 triple-frequency harmonics, obtains rising front 30ns, half-breadth 73ns, the pulse of amplitude 78kV quasi-square wave as module charging ± 100kV in 1.65 Ω loads.The people such as the Zhao Yue of China Engineering Physics Research Institute also utilize the method to carry out the design of square wave LTD, and the Preliminary Simulation factor such as harmonic wave branch parameters and switch from fluttering is on the impact of square wave LTD output parameter.
Although theory analysis and original reason experiment demonstrate the feasibility that LTD realizes square wave output, increasing harmonic wave circuitry number can make output waveform more close to square wave, but the introducing due to harmonic wave branch road will cause discharge paths number in module at least to increase half, if discharge paths will cause magnetic core and insulator volume to increase according to common arrangement mode, cost performance will be not high.Especially for the FLTD module producing megampere level output current, external diameter reaches 3m, if increase volume again, greatly, module cost will be multiplied for magnetic core and insulator manufacture difficulty.
Summary of the invention
The object of this invention is to provide a kind of square wave Linear transformer driver of double-layer coaxial structure, its space availability ratio is high, and volume is little, can significantly reduce drive source cost.
Technical solution of the present invention is: the square wave Linear transformer driver of the double-layer coaxial structure provided, and comprises from outside to inside coaxial outer discharge module, secondary cylinder and the internal layer discharge module arranged successively; Described outer discharge module one end ground connection, the other end connects secondary cylinder, forms outer fundamental frequency loop; Described internal layer discharge module one end ground connection, the other end connects secondary cylinder, forms internal layer harmonic wave regulating loop; Described secondary cylinder one end ground connection, ground connection after other end connection load, forms ectonexine LTD common return part.Inside and outside two-layer discharge module is coaxially arranged, and compact conformation, under same volume, this drive source can obtain more high-power output.
Above-mentioned outer discharge module comprises the outer high-tension electricity polar ring set gradually from the inside to the outside, outer magnetic core and multiple outer discharge paths parallel with one another; Described outer high-field electrode is connected with outer discharge paths after crossing outer magnetic core.Internal layer discharge module comprises the internal layer high-tension electricity polar ring, internal layer magnetic core and the multiple internal layer discharge paths parallel with one another that set gradually from outside to inside; Described internal layer high-field electrode is connected with internal layer discharge paths after crossing internal layer magnetic core.Outer discharge paths is fundamental frequency discharge paths, and internal layer discharge paths is that harmonic wave regulates branch road, can realize square-wave pulse and export.
Beneficial effect of the present invention is:
(1) the present invention adopts inside and outside two-layer discharge module coaxially arranged, and compact conformation, can obtain more high-power output under same volume.
(2) outer discharge paths of the present invention is fundamental frequency discharge paths, internal layer discharge paths is that harmonic wave regulates branch road, square-wave pulse can be realized in drive source volume situation export not increasing, and element manufacture difficulty is relatively little in module, space availability ratio is high, can significantly reduce drive source cost.
(3) discharge paths of the present invention is arranged as spoke-like, fundamental frequency discharge paths is positioned on excircle, and harmonic wave regulates branch road to be positioned on inner periphery, and therefore harmonic wave regulates the capacitor in branch road and volume of switch suitably to reduce, discharge loop inductance can significantly reduce, and delivery efficiency is relatively high.
(4) multiple block coupled in series can use by the present invention, and load obtains the more high-power square-wave pulse of more high voltage.
Accompanying drawing explanation
Fig. 1 is the three-dimensional structure schematic diagram of present pre-ferred embodiments;
Fig. 2 is the internal structure vertical view of present pre-ferred embodiments;
Fig. 3 is the partial sectional view of present pre-ferred embodiments;
Fig. 4 is that present pre-ferred embodiments simulates the square wave output current wave obtained.
Embodiment
See Fig. 1 and Fig. 2, the structure of present pre-ferred embodiments comprises coaxial outer wall 1, outer discharge module 2, secondary cylinder 3, internal layer discharge module 4 and the inwall 5 arranged from outside to inside.Overall structure is spoke-like, and the diameter of outer wall 1 is 2600mm, and the diameter of inwall 5 is 500mm, and whole height is 230mm.Outer discharge module 2 is formed primarily of 40 outer discharge paths 21, and each outer discharge paths is fundamental frequency discharge paths.Internal layer discharge module 4 is formed primarily of 24 internal layer discharge paths 41 parallel connections, wherein has 16 internal layer discharge paths to be triple-frequency harmonics branch road, has 8 internal layer discharge paths to be quintuple harmonics branch road.
See Fig. 3, the outer discharge module 2 of present pre-ferred embodiments comprises the outer high-tension electricity polar ring 22, outer magnetic core 23 and the multiple outer discharge paths 21 parallel with one another that set gradually from the inside to the outside, each outer discharge paths 21 is made up of two capacitors 1 and a gas switch 1 again, the effect that three, upper, middle and lower outer layer insulation 213 plays insulation and supports.The capacitor one being positioned at below is connected with lower ground plate 6 by an outer high-tension electricity polar ring 22, and the capacitor one being positioned at top is connected with secondary cylinder 3 by an outer high-tension electricity polar ring 22, forms outer primary loop.An outer magnetic core 23 is provided with between each capacitor 1 and outer high-tension electricity polar ring 22.The inside cavity of outer discharge module 2 is filled with transformer oil or adopts gas to increase dielectric strength.
Internal layer discharge module 4 comprises the internal layer high-tension electricity polar ring 42, internal layer magnetic core 43 and the multiple internal layer discharge paths 41 parallel with one another that set gradually from outside to inside, each internal layer discharge paths 41 is made up of two capacitors 2 411 and a gas switch 2 412 again, the effect that three, upper, middle and lower primary insulation 413 plays insulation and supports.The capacitor two being positioned at top is connected with upper ground plate 7 by an internal layer high-tension electricity polar ring 42, and the capacitor two being positioned at below is connected with secondary cylinder 3 by an internal layer high-tension electricity polar ring 42, forms inner primary loop.An internal layer magnetic core 43 is provided with between each capacitor 2 411 and internal layer high-tension electricity polar ring 42.The inside cavity of internal layer discharge module 4 is filled with transformer oil or adopts gas to increase dielectric strength.
Outer discharge module 2 and internal layer discharge module 4 share and are positioned at the High voltage output cylinder of the secondary cylinder 3 in the middle of the two as drive source.Secondary cylinder 3 lower end is connected with lower ground plate 6, and upper end is connected with upper ground plate 7 after connecting load again, forms the inside and outside middle secondary loop shared.Middle secondary loop adopts vacuum or Vacuum Magnetic insulation.
The course of work of drive source of the present invention is as follows: in outer discharge module 2 and internal layer discharge module 4, all gas switch ends applies ± 100kV high direct voltage respectively, and capacitor is full of electricity.After switch is triggered, the gas switch of all discharge paths of ectonexine synchronously punctures closed.The electric current of 40 outer discharge paths 21 converges on outer high-tension electricity polar ring 22 and forms main pulse electric current, the electric current of 24 internal layer discharge paths 41 converges on internal layer high-tension electricity polar ring 42 and forms harmonic wave regulating impulse electric current, and two electric currents form the square wave current pulse of amplitude in load place superposition.
In the preferred embodiment, all capacitors of outer discharge module 2 all adopt 65nF/100kV to mould shell capacitor, and capacitor sizes is 154mm × 250mm × 60mm, and discharge paths inductance is about 250nH.In internal layer discharge module 2, the capacitor of triple-frequency harmonics branch road adopts 12nF/100kV to mould shell capacitor, and capacitor sizes is 100mm × 150mm × 60mm, and discharge paths inductance is about 150nH; The capacitor of quintuple harmonics branch road adopts 8nF/50kV ceramic capacitor, and discharge paths inductance is about 150nH.Outer magnetic core 23 and internal layer magnetic core 43 all adopt magnetic amorphous alloy material, and its ectomesoderm magnetic core 23 is of a size of Φ 1720mm × Φ 1600mm × 35mm, and single magnetic core Flux consumption is 5.3mVs; Internal layer magnetic core 43 is of a size of Φ 1260mm × Φ 1220mm × 40mm, and single magnetic core Flux consumption is 2mVs.
As the capacitor charging ± 100kV of drive source of the present invention, adopt 2nH/0.1 Ω load, when in discharge module, all gas switch synchronously punctures, breadboardin obtains exporting pulse current waveform as shown in Figure 4.Result shows: the output current peak value of drive source of the present invention is 1023kA, and the rise time (10% ~ 90%) is 34ns, and the flat-top width of 80% is 236ns.The total energy storage 25.64kJ of module, the energy being passed to load within the main pulse 400ns time period is 22.7kJ, and energy efficiency reaches 88.5%.
Claims (6)
1. a square wave Linear transformer driver for double-layer coaxial structure, is characterized in that: comprise from outside to inside coaxial outer discharge module, secondary cylinder and the internal layer discharge module arranged successively;
Described outer discharge module one end ground connection, the other end connects secondary cylinder, forms outer fundamental frequency loop;
Described internal layer discharge module one end ground connection, the other end connects secondary cylinder, forms internal layer harmonic wave regulating loop;
Described secondary cylinder one end ground connection, ground connection after other end connection load, forms outer fundamental frequency loop, internal layer harmonic wave regulating loop common sparing.
2. the square wave Linear transformer driver of double-layer coaxial structure according to claim 1, is characterized in that: described outer discharge module comprises the outer high-tension electricity polar ring set gradually from the inside to the outside, outer magnetic core and multiple outer discharge paths parallel with one another; Described outer high-field electrode is connected with outer discharge paths after crossing outer magnetic core.
3. the square wave Linear transformer driver of double-layer coaxial structure according to claim 1 and 2, is characterized in that: described internal layer discharge module comprises the internal layer high-tension electricity polar ring, internal layer magnetic core and the multiple internal layer discharge paths parallel with one another that set gradually from outside to inside; Described internal layer high-field electrode is connected with internal layer discharge paths after crossing internal layer magnetic core.
4. the square wave Linear transformer driver of double-layer coaxial structure according to claim 3, is characterized in that: described outer discharge paths is fundamental frequency discharge paths; Described internal layer discharge paths is that harmonic wave regulates branch road.
5. the square wave Linear transformer driver of double-layer coaxial structure according to claim 4, is characterized in that: each outer discharge paths and internal layer discharge paths include two capacitors and a gas switch, and described capacitor passes through insulator dielectric.
6. the square wave Linear transformer driver of double-layer coaxial structure according to claim 5, is characterized in that: outer discharge module and internal layer discharge module are insulated by transformer oil or gas medium; Middle secondary cylinder adopts vacuum or Vacuum Magnetic insulation.
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106972841A (en) * | 2017-04-25 | 2017-07-21 | 中国工程物理研究院流体物理研究所 | A kind of simplified pulse shaping circuit and LTD modules |
| CN110098760A (en) * | 2019-05-05 | 2019-08-06 | 西北核技术研究所 | A kind of FLTD device and its assembly method, maintaining method convenient for safeguarding |
| CN110311661A (en) * | 2019-07-17 | 2019-10-08 | 中国工程物理研究院应用电子学研究所 | Single-stage pulse power driving structure, device and driving source based on ceramic condenser |
| CN110417379A (en) * | 2019-07-23 | 2019-11-05 | 西北核技术研究院 | A kind of angular transmitting device for pulse power supply |
| CN115051690A (en) * | 2022-06-17 | 2022-09-13 | 西北核技术研究所 | Dozens of megaamperes FLTD driving source based on shared cavity |
| CN117727548A (en) * | 2024-01-30 | 2024-03-19 | 零八一电子集团四川力源电子有限公司 | Regulator for mobile support of common cavity FLTD assembly |
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| CN104467795A (en) * | 2014-10-24 | 2015-03-25 | 西北核技术研究所 | Multilevel series LTD driving source and synchronous trigger method thereof |
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| US20140354076A1 (en) * | 2012-06-22 | 2014-12-04 | Sandia Corporation | Linear transformer driver for pulse generation with fifth harmonic |
| CN102739201A (en) * | 2012-06-29 | 2012-10-17 | 西北核技术研究所 | Semiconductor opening switch (SOS)-based ultra-wide spectrum pulse generator with 100 kHz pulse frequency |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106972841A (en) * | 2017-04-25 | 2017-07-21 | 中国工程物理研究院流体物理研究所 | A kind of simplified pulse shaping circuit and LTD modules |
| CN110098760A (en) * | 2019-05-05 | 2019-08-06 | 西北核技术研究所 | A kind of FLTD device and its assembly method, maintaining method convenient for safeguarding |
| CN110311661A (en) * | 2019-07-17 | 2019-10-08 | 中国工程物理研究院应用电子学研究所 | Single-stage pulse power driving structure, device and driving source based on ceramic condenser |
| CN110311661B (en) * | 2019-07-17 | 2022-11-01 | 中国工程物理研究院应用电子学研究所 | Single-stage pulse power driving structure, device and driving source based on ceramic capacitor |
| CN110417379A (en) * | 2019-07-23 | 2019-11-05 | 西北核技术研究院 | A kind of angular transmitting device for pulse power supply |
| CN110417379B (en) * | 2019-07-23 | 2023-03-21 | 西北核技术研究院 | Angular transmission device for pulse power source |
| CN115051690A (en) * | 2022-06-17 | 2022-09-13 | 西北核技术研究所 | Dozens of megaamperes FLTD driving source based on shared cavity |
| CN117727548A (en) * | 2024-01-30 | 2024-03-19 | 零八一电子集团四川力源电子有限公司 | Regulator for mobile support of common cavity FLTD assembly |
| CN117727548B (en) * | 2024-01-30 | 2024-04-26 | 零八一电子集团四川力源电子有限公司 | Regulator for movable support of common cavity FLTD assembly |
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