CN101576579B - Coaxial-symmetrical discrete capacitive voltage divider used for nanosecond high voltage pulse measurement - Google Patents
Coaxial-symmetrical discrete capacitive voltage divider used for nanosecond high voltage pulse measurement Download PDFInfo
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- CN101576579B CN101576579B CN2009100227809A CN200910022780A CN101576579B CN 101576579 B CN101576579 B CN 101576579B CN 2009100227809 A CN2009100227809 A CN 2009100227809A CN 200910022780 A CN200910022780 A CN 200910022780A CN 101576579 B CN101576579 B CN 101576579B
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Abstract
The invention discloses a coaxial-symmetrical discrete capacitive voltage divider used for nanosecond high voltage pulse measurement, which is used for the pulse power technology or the measurement ofnanosecond transient high voltage of an electric power system, and can convert high-amplitude transient voltage signals into low voltage capable of being measured by recording instruments such as anoscilloscope and the like without loss. The invention adopts the measurement proposal that four voltage dividers are distributed for balancing a cross section electric field, the mode can make the high-frequency electric fields of the cross sections of the voltage dividers distributed evenly, and improve the response bandwidth of the measurement; simultaneously, because a low-voltage arm capacitoradopts a discrete capacitance element with large capacitance, when large capacitive voltage division ratio is realized, compared with the prior coaxial capacitive voltage divider, the outline size ofthe voltage divider is greatly reduced, the parasitic inductance of the capacitive voltage divider is further reduced, the measurement bandwidth is improved, and simultaneously great convenience is brought for the use under the condition that an installing space is limited. Compared with the prior art, the coaxial-symmetrical discrete capacitive voltage divider has the advantages of compact structure, small volume and wide response frequency bandwidth, and is applicable to measuring quick changing pulse of high voltage.
Description
Technical field
The present invention relates to a kind of coaxial-symmetrical discrete capacitive voltage divider, be specifically related to a kind of coaxial-symmetrical discrete capacitive voltage divider that the nanosecond high-voltage pulse is measured that is used for that is used for Pulse Power Techniques or electric system.
Background technology
When the pulse voltage that will measure is not too high, and the loaded impedance of measured system hour, can accurately measure pulse voltage with resitstance voltage divider.If the electric pressure of measured system is higher, then need to consider the dielectric voltage withstand problem of resitstance voltage divider, the increase of insulated lengths and the influence of insulating material will increase the stray capacitance and the stray inductance of resitstance voltage divider, limited the measurement bandwidth, in addition, when the loaded impedance of system under test (SUT) was big, resitstance voltage divider had shunting action, can produce additional effect to system under test (SUT).
Capacitive divider is a kind of traditional voltage measuring apparatus, and it has overcome the shortcoming of resitstance voltage divider, and is very little to measured systematic influence, the intrinsic standoff ratio height.And its principle is simple, response is fast, power is big, the measurement distortion is less, is widely used in the High-Voltage Experimentation system.Capacitive divider generally can be divided into plate, discrete type and coaxial type.
Summary of the invention
The object of the present invention is to provide a kind of coaxial-symmetrical discrete capacitive voltage divider that the nanosecond high-voltage pulse is measured that is used for that high amplitude transient voltage conversion of signals is become low-voltage that register instrument such as oscillograph can measure that can can't harm.
For achieving the above object, the technical solution used in the present invention is: casting epoxy resin between cylindrical, copper conductor and bonding shell, this epoxy resin wraps up implant electrode, the cylindrical, copper conductor mediates, implant electrode is round the cylindrical, copper conductor, 4 screws are equidistantly opened along circumferential direction in the outside at the bonding shell, and are threaded the low-voltage capacitance C of dividing potential drop box with the assembling of dividing potential drop box
LData side be connected with implant electrode by binding post, the whole capacitor voltage divider is by the ground terminal ground connection on the bonding shell.
Dividing potential drop box of the present invention is made by metal material, and this dividing potential drop box comprises shielding case and is arranged on the interior low-voltage capacitance C of shielding case
LAs the low-voltage arm of capacitive divider, the dividing potential drop box is connected with the screw of bonding shell by the assembling screw thread, and one of them assembling SMA socket of 4 dividing potential drop boxes is as the low-voltage output port of capacitive divider, and the signal end of SMA socket is by build-out resistor R
pWith low-voltage capacitance C
LData side connect, the earth terminal of SMA socket is connected with shielding case.
The present invention adopts the combined of coaxial and discrete component, wherein, the coaxial configuration that high-voltage arm electric capacity adopts bus and implant electrode to constitute, secondary low-voltage arm electric capacity adopts the discrete capacitor element of 4 groups of equivalences, and is installed on 4 how much symmetric positions around the high pressure coaxial configuration respectively.
The present invention adopts the capacitance partial pressure mode based on the electro-induction principle, because the transmission medium of induction field can be an insulating medium, therefore, can realize high-tension isolation effectively; Secondly, the present invention adopts coaxial and combined structure discrete component, wherein, and the coaxial configuration that high-voltage arm electric capacity adopts bus and implant electrode to constitute, secondary low-voltage arm electric capacity adopts the discrete capacitor element of 4 groups of equivalences, is installed on high pressure coaxial configuration 4 how much symmetric positions on every side respectively.This mode can make the high-frequency electric field of voltage divider xsect evenly distribute, and improves and measures bandwidth.Simultaneously, because low-voltage arm electric capacity adopts the bigger discrete capacitor element of appearance value, when the intrinsic standoff ratio of capacitive divider is big, can reduce the physical dimension of whole capacitor voltage divider greatly, further reduce the stray inductance of capacitive divider, improve it and measure bandwidth, and give to use under the limited condition of installing space and bring bigger facility.
Above measuring principle and technical measures make the present invention satisfy under the prerequisite of measuring bandwidth and intrinsic standoff ratio, can realize high-tension isolation reliably and the electromagnetic interference (EMI) in the measurement environment is effectively shielded.Advantages such as the present invention has compact conformation, volume is little, and response band is wide are applicable to the fast-changing impulsive measurement of high voltage.
Description of drawings
Fig. 1 is an external overall structural representation of the present invention;
Fig. 2 is an inner structure synoptic diagram of the present invention.
Embodiment
Below in conjunction with accompanying drawing structural principle of the present invention and principle of work are described in further detail.
Cylindrical, copper conductor 1 of the present invention mediates, and implant electrode 2 is round cylindrical, copper conductor 1, and the distributed capacitance between the two constitutes the high-voltage arm of capacitive divider, the low-voltage capacitance C in the dividing potential drop box 4
LLow-voltage arm as capacitive divider, after high-voltage arm is contacted by binding post 5 and low-voltage arm, form the capacitance partial pressure loop through bonding shell 3 and ground terminal 7 ground connection, the low-voltage signal of capacitive divider is drawn by being installed on a SMA socket on the dividing potential drop box 4.
Casting epoxy resin 6 between cylindrical, copper conductor 1 and bonding shell 3, this epoxy resin 6 is with implant electrode 2 parcels.Radially equidistantly open 4 screws in the outside of bonding shell 3 and be connected, dividing potential drop box low-voltage capacitance C with the assembling screw thread 10 of dividing potential drop box 4
LData side be connected with implant electrode 2 by binding post 5.Capacitive divider is by ground terminal 7 ground connection on the bonding shell 3.
4 dividing potential drop boxes 4 are looped around the outside of bonding shell 3, are symmetrically distributed the capacitor C in the dividing potential drop box 4 on the locus
LAs the low-voltage arm of capacitive divider, the voltage that requires electric capacity to bear greatly is lower, can obtain bigger intrinsic standoff ratio like this, thereby realizes the purpose with low pressure instrument measurement high pressure.Capacitor C
LData side be connected with implant electrode 2 by binding post 5, the ground connection side is connected with shielding box 8.The capacitor C of one of them dividing potential drop box 4
L(data side) is by build-out resistor R
PBe connected with SMA socket 9, be used for drawing of low voltage signal, SMA socket 9 is installed on the side surface of shielding box.
During work, low voltage signal is delivered to oscillograph by SMA socket 9 and concentric cable, and its waveform is read the line data record of going forward side by side from oscillograph.
Claims (2)
1. be used for the coaxial one symmetrical discrete capacitive voltage divider that the nanosecond high-voltage pulse is measured, it is characterized in that: casting epoxy resin (6) between cylindrical, copper conductor (1) and bonding shell (3), this epoxy resin (6) wraps up implant electrode (2), cylindrical, copper conductor (1) mediates, implant electrode (2) is round cylindrical, copper conductor (1), 4 screws are equidistantly opened along circumferential direction in the outside at bonding shell (3), and be connected the low-voltage capacitance C of dividing potential drop box (4) with the assembling screw thread (10) of dividing potential drop box (4)
LData side be connected with implant electrode (2) by binding post (5), the whole capacitor voltage divider passes through ground terminal (7) ground connection on the bonding shell (3).
2. coaxial-symmetrical discrete capacitive the voltage divider that is used for the measurement of nanosecond high-voltage pulse according to claim 1, it is characterized in that: said dividing potential drop box (4) is made by metal material, and this dividing potential drop box (4) comprises shielding case (8) and is arranged on the interior low-voltage capacitance C of shielding case (8)
LLow-voltage arm as capacitive divider, dividing potential drop box (4) is connected with the screw of bonding shell (3) by assembling screw thread (10), one of them assembling SMA socket (9) of 4 dividing potential drop boxes (4) is as the low-voltage output port of capacitive divider, and the signal end of SMA socket (9) is by build-out resistor R
pWith low-voltage capacitance C
LData side connect, the earth terminal of SMA socket (9) is connected with shielding case (8).
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| Application Number | Priority Date | Filing Date | Title |
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| CN2009100227809A CN101576579B (en) | 2009-06-01 | 2009-06-01 | Coaxial-symmetrical discrete capacitive voltage divider used for nanosecond high voltage pulse measurement |
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| CN2009100227809A CN101576579B (en) | 2009-06-01 | 2009-06-01 | Coaxial-symmetrical discrete capacitive voltage divider used for nanosecond high voltage pulse measurement |
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| CN101576579A CN101576579A (en) | 2009-11-11 |
| CN101576579B true CN101576579B (en) | 2011-01-05 |
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Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101710137B (en) * | 2009-12-09 | 2011-07-27 | 西安交通大学 | Inductance and resistance compensating type capacitive voltage divider |
| CN101793915A (en) * | 2010-04-06 | 2010-08-04 | 西安交通大学 | Capacitive voltage divider formed by a printed circuit board |
| CN101839939B (en) * | 2010-04-23 | 2011-09-14 | 重庆大学 | Subnanosecond high-voltage pulse measurement system |
| CN101949964B (en) * | 2010-08-12 | 2013-06-19 | 国家电网公司 | Space capacitive voltage divider and application thereof on high voltage measuring device |
| CN102128964B (en) * | 2011-01-14 | 2013-03-20 | 西北核技术研究所 | Capacitive voltage divider used for measuring radiation diode parameters and installation method |
| CN103529262A (en) * | 2013-10-18 | 2014-01-22 | 无锡希恩电气有限公司 | High-voltage capacitive voltage divider |
| ES2628237T3 (en) * | 2014-09-22 | 2017-08-02 | Siemens Aktiengesellschaft | Coaxial design for a secondary unit. |
| CN108152554B (en) * | 2018-02-02 | 2024-03-19 | 中国工程物理研究院流体物理研究所 | Capacitive voltage divider for measuring pulse voltage of coaxial cable |
| CN108896846B (en) * | 2018-06-01 | 2020-11-13 | 中国人民解放军海军工程大学 | Device and method for measuring conducted interference of high-voltage system |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN86107201A (en) * | 1985-10-14 | 1987-04-15 | 默林·格伦 | The voltage measuring apparatus of high voltage metalclad installation |
| CN1431519A (en) * | 2002-01-07 | 2003-07-23 | 三菱电机株式会社 | Transformer for gas insulated electrical appts. |
| JP2004357376A (en) * | 2003-05-28 | 2004-12-16 | Hitachi Ltd | Measuring device for switchgear |
| EP1624311A1 (en) * | 2004-08-06 | 2006-02-08 | Passoni & Villa Fabbrica Isolatori e Condensatori S.p.A. | Combined current and voltage measurement transformer of the capacitor bushing type |
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2009
- 2009-06-01 CN CN2009100227809A patent/CN101576579B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN86107201A (en) * | 1985-10-14 | 1987-04-15 | 默林·格伦 | The voltage measuring apparatus of high voltage metalclad installation |
| CN1431519A (en) * | 2002-01-07 | 2003-07-23 | 三菱电机株式会社 | Transformer for gas insulated electrical appts. |
| JP2004357376A (en) * | 2003-05-28 | 2004-12-16 | Hitachi Ltd | Measuring device for switchgear |
| EP1624311A1 (en) * | 2004-08-06 | 2006-02-08 | Passoni & Villa Fabbrica Isolatori e Condensatori S.p.A. | Combined current and voltage measurement transformer of the capacitor bushing type |
Non-Patent Citations (2)
| Title |
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| 卫兵等.脉冲功率装置中电容分压器的设计和应用.《高电压技术》.2007,第33卷(第12期), * |
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