CN105448389B - Low-impedance high-voltage coaxial cable - Google Patents
Low-impedance high-voltage coaxial cable Download PDFInfo
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- CN105448389B CN105448389B CN201511028362.2A CN201511028362A CN105448389B CN 105448389 B CN105448389 B CN 105448389B CN 201511028362 A CN201511028362 A CN 201511028362A CN 105448389 B CN105448389 B CN 105448389B
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/0009—Details relating to the conductive cores
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/02—Disposition of insulation
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
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Abstract
The invention relates to a low-impedance high-voltage coaxial cable belonging to the technical field of pulse power. The invention is composed of N metal inner conductors, N inner insulating layers, a metal outer conductor, an outer insulating layer and metal connectors; N is more than or equal to 2; the N metal inner conductors and the N inner insulating layers form N high voltage wires; the N high voltage wires are arranged into n layers in the outer insulating layer; n is more than or equal to 2; the N inner insulating layers are mutually independent; the N metal inner conductors are respectively connected parallelly at two ends through two metal connectors so as to form the inner conductor of the low-impedance high-voltage coaxial cable; the N mutually independent inner insulating layers form the inner insulating layer of the low-impedance high-voltage coaxial cable; the outer insulating layer and the metal outer conductor are taken as the outer insulating layer and the outer conductor of the low-impedance high-voltage coaxial cable. Because the N high-voltage wires are connected parallelly, the impedance and the usage amount of the metal inner conductor are reduced, the problem of high turn radius resulted from directly increasing the diameters of the inner conductor and the outer conductor in the traditional low-impedance high-voltage coaxial cable is solved.
Description
Technical field
The present invention relates to a kind of low impedance, high voltage coaxial cable is and in particular to a kind of high voltage, tight-turning low-resistance
Anti- coaxial cable, belongs to technical field of pulse power, is mainly used in pulse signal transmission and the generation of high-voltage square-wave pulse.
Background technology
In technical field of pulse power, high-pressure coaxial cable can be used for transferring high voltage pulse it is also possible to make pulse-forming line,
For producing high-voltage square-wave pulse.Through the development of decades, high-pressure coaxial cable running voltage is promoted to number from tens kilovolts
Hundred kilovolts, it has been applied in various types of pulse power device, such as line transformer, solid state pulse manipulator
Deng.However, as the high-pressure coaxial cable of these devices, presently, there are the problems such as impedance is higher, radius of turn is big, device is made to hinder
Anti- higher, volume more huge it would be highly desirable to solve.
Traditional high-pressure coaxial cable is typically by metallic inner conductor, inner insulating layer, metal outer conductor and external insulation layer four
Divide layer overlaps to form, by adjusting the diameter of metallic inner conductor, inner insulating layer and metal outer conductor, coaxial cable can be adjusted
Running voltage and impedance, in general, inner insulating layer is thinner, and running voltage is lower, and impedance is less.And it is certain in order to ensure
Running voltage, in order to reduce impedance, needs to increase the diameter of metallic inner conductor, inner insulating layer and metal outer conductor simultaneously, causes
High-pressure coaxial cable volume is larger, and radius of turn also larger [Chen Guoping, Luo Yi, " and the preparation of low-impedance coaxial cable with can
Adjust the resis tance method of surveying ", digital communication, 2014, vol.41, no.6, pp.1-2].
Low impedance, high voltage coaxial cable generally existing on market is relatively large in diameter, and the larger problem of radius of turn is it is impossible to expire
The demand of sufficient densification high power pulse power device, therefore, searching diameter is little, the little low impedance, high voltage coaxial electrical of radius of turn
Cable is significant to the densification of high power pulse power device.
Content of the invention
The technical problem to be solved in the present invention is to overcome existing low impedance, high voltage coaxial cable to be relatively large in diameter, and radius of turn is relatively
Wait greatly not enough it is proposed that one kind is by the parallel connection of multiply metallic inner conductor, the detached new low impedance, high voltage coaxial cable of inner insulating layer,
It has structure simply, high pressure, and impedance is low, the little advantage of radius of turn.
The technical solution used in the present invention is:
A kind of Low ESR high voltage coaxial cable, by n root metallic inner conductor, n bar inner insulating layer, metal outer conductor, outer absolutely
Edge layer and metal connector composition, n >=2, n root metallic inner conductor and n bar inner insulating layer constitute n root high-tension bus-bar, n root high-tension electricity
Line is in that n-layer arranges in external insulation layer, n >=2, and n bar inner insulating layer is separate, and n root metallic inner conductor passes through respectively at two ends
Two pieces of metal connectors are connected in parallel, and constitute the inner wire of Low ESR high voltage coaxial cable, the separate interior insulation of n bar
Layer constitutes the inner insulating layer of low impedance, high voltage coaxial cable, and external insulation layer and metal outer conductor are as low impedance, high voltage coaxial cable
External insulation layer and outer conductor;
For ensureing high-voltage resistance capability, Low ESR and the tight turn radius of Low ESR high voltage coaxial cable of the present invention,
Need fully to design the size of each building block of low impedance, high voltage coaxial cable, need to consider following two aspects in design:
1. in low impedance, high voltage coaxial cable n root metallic inner conductor diameter d1, the diameter d of n bar inner insulating layer2, n root gold
Largest outer diameter (the d being formed after belonging to inner wire arrangementk+d1) and metal outer conductor interior diameter diSelection to disclosure satisfy that in spy
Will not puncture under fixed working voltage, meetWherein ebFor inner insulating layer insulation
The disruptive field intensity of material, is determined by the insulation characterisitic of insulant, vcFor the running voltage of coaxial cable, k is to puncture safe system
Number, 0 < k < 1, k is less, is less susceptible to puncture;
2. the impedance required for low impedance, high voltage coaxial cable is by the interior diameter d of metal outer conductori, metal outer conductor outer
Diameter dwDetermine, in general cable resistance is with the radical n of high-tension bus-barL is the electricity of cable unit length
Sense, c is the electric capacity of cable unit length, and the circular of l and c is as follows:
Calculate l and c when, coaxial cable is respectively labeled as from inside to outside the 1st layer, the 2nd layer, the 3rd layer ..., until
N-th layer, in general, high-tension bus-bar quantity n is bigger, and number of plies n is more, and wherein the 1st layer is made up of 1 high-tension bus-bar, with metal
Outer conductor constitutes coaxial configuration;2nd layer is made up of i root high-tension bus-bar, the circumference that the metallic inner conductor center of i root high-voltage line surrounds
A diameter of d3;3rd layer is made up of j root high-tension bus-bar, and the circle diameter that the metallic inner conductor center of j root high-voltage line surrounds is
d4;……;N-th layer is made up of k root high-tension bus-bar, and the circle diameter that the metallic inner conductor center of k root high-voltage line surrounds is dk, that
The 1st layer of inductance constituting coaxial configuration with metal outer conductor can be calculated be respectively as follows: with electric capacity
Wherein μ0For permeability of vacuum, ε0For permittivity of vacuum, μrFor the relative permeability of insulating barrier insulant, εr
For the relative dielectric constant of insulating barrier insulant, the 2nd layer of inductance being constituted with metal outer conductor is respectively as follows: with electric capacity
The 3rd layer of inductance being constituted with metal outer conductor is respectively as follows: with electric capacity
……
The inductance that n-th layer is constituted with metal outer conductor and electric capacity are respectively as follows:
Therefore entirely the unit length inductance of coaxial cable is respectively as follows: with capacitance per unit length
C=c1+c2+c3+…+cn
Further, in order to improve the high-voltage resistance capability of coaxial cable of the present invention, can be between n root high-tension bus-bar
Corresponding insulant is filled, such as transformer oil, politef etc. between gap.
Further, the inner insulating layer of coaxial cable of the present invention is politef.
Further, the metal outer conductor of coaxial cable of the present invention is wire sheathing.
Further, the external insulation layer of coaxial cable of the present invention is politef.
The operation principle of the present invention is: theoretical according to coaxial cable, metallic inner conductor, inner insulating layer, metal outer conductor and
External insulation layer four part layer overlaps just constitute coaxial cable.Traditional metallic inner conductor and inner insulating layer are carried out by the present invention
Improve, be changed to n bar high-tension bus-bar in parallel, such that it is able to reduce the impedance of coaxial cable, the radius of turn of reduction coaxial cable.By
Can ensure that in this structure and lead outside the running voltage of coaxial cable, and quantity n by reasonable selection high-tension bus-bar and metal
The diameter of body just can conveniently adjust the impedance of coaxial cable, meets compact, the application need of miniaturization high power pulse device
Ask.
Compared with prior art, it is an advantage of the invention that by the parallel connection of n bar high-tension bus-bar, increasing in coaxial cable metal
The diameter of conductor, thus reducing impedance, simultaneously because the n bar high-tension bus-bar adopting is in parallel, reduces metallic inner conductor
Usage amount, it is to avoid traditional low impedance, high voltage coaxial cable directly increases internal and external conductor diameter and leads to the big problem of radius of turn.
Brief description
Fig. 1 is background technology [Chen Guoping, Luo Yi, " preparation of low-impedance coaxial cable and adjustable resistance method of testing ", number
Word communicate, 2014, vol.41, no.6, pp.1-2] in conventional coaxial cable generalized section;
Fig. 2 is the low impedance, high voltage coaxial cable tomograph of the present invention;
Fig. 3 is the sectional view of the single high-tension bus-bar forming low impedance, high voltage coaxial cable of the present invention;
Fig. 4 is the low impedance, high voltage coaxial cable sectional view of the present invention;
Fig. 5 is the sectional view of the low impedance, high voltage coaxial cable designs example of the present invention;
Fig. 6 is the experiment test of low impedance, high voltage coaxial cable designs example and the simulation calculation waveform of the present invention;
Wherein 9 is experiment test waveform, and 10 is simulation calculation waveform.
Specific embodiment
Below in conjunction with the accompanying drawings the specific embodiment of the present invention is further described.
Fig. 1 is background technology [Chen Guoping, Luo Yi, " preparation of low-impedance coaxial cable and adjustable resistance method of testing ", number
Word communicate, 2014, vol.41, no.6, pp.1-2] in conventional coaxial cable generalized section, from figure as can be seen that tradition
Coaxial cable mainly by single piece of metal inner wire 1, inner insulating layer 2, metal outer conductor 3 and external insulation layer 4 form, in order to meet work
Make the demand of voltage, need when reducing impedance to increase metallic inner conductor 1, inner insulating layer 2, metal outer conductor 3 and external insulation layer 4
Diameter, cause high-pressure coaxial cable radius of turn larger.
Fig. 2 is Low ESR high voltage coaxial cable tomograph of the present invention, and the Low ESR high voltage of the present invention is same
Shaft cable is made up of high-tension bus-bar 5, metal outer conductor 6, external insulation layer 7 and metal clutch disk 8, every high-tension bus-bar 5 by
Individually metallic inner conductor 501 and inner insulating layer 502 form, and metallic inner conductor 501 is connected by metal respectively two ends
Disk 8 is in parallel.
Fig. 3 is the sectional view of the high-tension bus-bar 5 forming low impedance, high voltage coaxial cable of the present invention, described high-tension bus-bar
5 are made up of metallic inner conductor 501 and inner insulating layer 502, by the diameter d of reasonable selection metallic inner conductor 5011And inner insulating layer
502 diameter d2, high-tension bus-bar 5 can be made to be operated in specific voltage.
Fig. 4 is low impedance, high voltage coaxial cable sectional view of the present invention.The radical n of high-tension bus-bar, arranges as n-layer, and the 1st
Layer is made up of 1 high-tension bus-bar, and it constitutes coaxial configuration with metal outer conductor;2nd layer is made up of i root high-tension bus-bar, i root high pressure
The circle diameter that the metallic inner conductor center of line surrounds is d3;3rd layer by j root high-tension bus-bar, the metallic inner conductor of j root high-voltage line
The circle diameter that center surrounds is d4;……;N-th layer is made up of k root high-tension bus-bar, in the metallic inner conductor of k root high-tension bus-bar
The circle diameter that the heart surrounds is dk;High-pressure coaxial cable metal outer conductor interior diameter di, the overall diameter d of metal outer conductorw, coaxially
Largest outer diameter d of cablea;
The sectional view of the low impedance, high voltage coaxial cable that Fig. 5 designs for the National University of Defense technology.The design work of this coaxial cable
Making voltage is 50kv, impedance 10 ω.The radical n=19 of high-tension bus-bar, point 3 layers of arrangement, high-tension bus-bar interior diameter d1=0.4mm,
Overall diameter d2=4mm;The circle diameter that the metallic inner conductor center of the 2nd layer of 6 high-tension bus-bar surrounds is d3=8mm;3rd layer 12
The circle diameter that the metallic inner conductor center of root high-tension bus-bar surrounds is d4=16mm;Straight in high-pressure coaxial cable metal outer conductor
Footpath di=20mm, the overall diameter d of metal outer conductorw=21mm;Largest outer diameter d of coaxial cablea=22mm, insulant is adopted
With politef, its relative dielectric constant εr=2.3, according toAnd formula (1)-(5) calculate inductance and electricity
The method held, the design impedance that can obtain cable is about 10 ohm.
Fig. 6 is the test experiments waveform of low impedance, high voltage coaxial cable designs example and the simulation calculation waveform of the present invention
(in figure 9 is experimental waveform, and 10 is simulation waveform).Method using experiment and simulation comparison measures coax impedance, will be with
Shaft cable is used as pulse and forms line, and load impedance is taken 50 ohm.By the pulse shaping function of coaxial cable, test
Voltage waveform in load, resettles circuit simulating software, sets load impedance as 50 ohm, adjusts the resistance of coaxial cable
Anti-, when simulation waveform is consistent with experimental waveform, the impedance of coaxial cable can be obtained, about 10 ohm, with design objective one
Cause.
More than, provide description of the invention to those skilled in the art, so that they should be readily appreciated that and prevaricate this
Invention.For those skilled in the art, the various changes that these are implemented are even more it will be apparent that and need not be creative
Work.Therefore, the present invention is not to limit scheme described herein, but the scope consistent with described claim.
Claims (6)
1. a kind of Low ESR high voltage coaxial cable it is characterised in that: described coaxial cable by n root metallic inner conductor, n bar absolutely
Edge layer, metal outer conductor, external insulation layer and metal connector composition, n >=2, n root metallic inner conductor and n bar inner insulating layer constitute n
Root high-tension bus-bar, n root high-tension bus-bar is in that n-layer arranges in external insulation layer, n >=2, and n bar inner insulating layer is separate, n root metal
Inner wire is connected in parallel by two pieces of metal connectors respectively at two ends, constitutes in Low ESR high voltage coaxial cable and leads
Body, the separate inner insulating layer of n bar constitutes inner insulating layer, external insulation layer and the metal outer conductor of low impedance, high voltage coaxial cable
External insulation layer as low impedance, high voltage coaxial cable and outer conductor;
The circular of the electric capacity c of the inductance l of the unit length of described coaxial cable and unit length is as follows:
Coaxial cable is respectively labeled as from inside to outside the 1st layer, the 2nd layer, the 3rd layer ..., until n-th layer, in general, high
Piezoelectric wire quantity n is bigger, and number of plies n is more, and wherein the 1st layer is made up of 1 high-tension bus-bar, constitutes coaxial knot with metal outer conductor
Structure;2nd layer is made up of i root high-tension bus-bar, and the circle diameter that the metallic inner conductor center of i root high-voltage line surrounds is d3;3rd layer by
J root high-tension bus-bar forms, and the circle diameter that the metallic inner conductor center of j root high-voltage line surrounds is d4;……;N-th layer is high by k root
Piezoelectric wire forms, and the circle diameter that the metallic inner conductor center of k root high-voltage line surrounds is dk, then the 1st layer can be calculated
The inductance constituting coaxial configuration with metal outer conductor is respectively as follows: with electric capacity
Wherein μ0For permeability of vacuum, ε0For permittivity of vacuum, μrFor the relative permeability of insulating barrier insulant, εrFor insulation
The relative dielectric constant of layer insulant;
The 2nd layer of inductance being constituted with metal outer conductor is respectively as follows: with electric capacity
The 3rd layer of inductance being constituted with metal outer conductor is respectively as follows: with electric capacity
The inductance that n-th layer is constituted with metal outer conductor and electric capacity are respectively as follows:
Therefore entirely the inductance of unit length of coaxial cable is respectively as follows: with the electric capacity of unit length
C=c1+c2+c3+…+cn..
2. according to claim 1 Low ESR high voltage coaxial cable it is characterised in that: in order to improve described coaxial cable
High-voltage resistance capability, can between the gap of n root high-tension bus-bar fill insulant.
3. according to claim 2 Low ESR high voltage coaxial cable it is characterised in that: described insulant be transformer oil
Or politef.
4. according to claim 1 Low ESR high voltage coaxial cable it is characterised in that: described inner insulating layer be polytetrafluoroethyl-ne
Alkene.
5. according to claim 1 Low ESR high voltage coaxial cable it is characterised in that: described metal outer conductor be metal compile
Tissue layer.
6. according to claim 1 Low ESR high voltage coaxial cable it is characterised in that: described external insulation layer be polytetrafluoroethyl-ne
Alkene.
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CN201511028362.2A CN105448389B (en) | 2015-12-31 | 2015-12-31 | Low-impedance high-voltage coaxial cable |
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CN201511028362.2A CN105448389B (en) | 2015-12-31 | 2015-12-31 | Low-impedance high-voltage coaxial cable |
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CN105448389B true CN105448389B (en) | 2017-02-01 |
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CN114373570B (en) * | 2022-01-21 | 2023-04-28 | 中国工程物理研究院流体物理研究所 | Coaxial high-voltage pulse forming wire flexible cable |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN101149996A (en) * | 2007-08-09 | 2008-03-26 | 罗志昭 | Multiple fission copper or aluminum busbar |
CN102148072A (en) * | 2010-07-21 | 2011-08-10 | 上海西邦电气有限公司 | Flexible heavy-current tubular busbar and processing method therefor |
CN203351241U (en) * | 2013-07-22 | 2013-12-18 | 山东乐航节能科技股份有限公司 | High frequency current transmission cable for induction heating equipment |
-
2015
- 2015-12-31 CN CN201511028362.2A patent/CN105448389B/en active Active
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN101149996A (en) * | 2007-08-09 | 2008-03-26 | 罗志昭 | Multiple fission copper or aluminum busbar |
CN102148072A (en) * | 2010-07-21 | 2011-08-10 | 上海西邦电气有限公司 | Flexible heavy-current tubular busbar and processing method therefor |
CN203351241U (en) * | 2013-07-22 | 2013-12-18 | 山东乐航节能科技股份有限公司 | High frequency current transmission cable for induction heating equipment |
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