CN1929282B - Inductance energy-releasing swashing current-generator - Google Patents
Inductance energy-releasing swashing current-generator Download PDFInfo
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- CN1929282B CN1929282B CN200610096125A CN200610096125A CN1929282B CN 1929282 B CN1929282 B CN 1929282B CN 200610096125 A CN200610096125 A CN 200610096125A CN 200610096125 A CN200610096125 A CN 200610096125A CN 1929282 B CN1929282 B CN 1929282B
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Abstract
This invention relates to surfer current generator and especially one to output current to form induction energy discharge, which is used to analogue lighting direct effect or other high energy current testament and is composed of charging positive and negative electrode to connect two ends of capacitor parallel to memory capacitor with switch into capacitor to form circuit, wherein, the current control parts on wave sensor loop; the said current controller parts are continues diode, air discharging gap, transistor tube and hydrogen gate tube.
Description
Technical field
The present invention relates to a kind of current rush generator, especially a kind of output current is only let out the peak value long duration current rush generator that can form by inductance, and it is mainly used in the test of simulation thunder and lightning direct effect or other similar high-energy current effects.
Background technology
Along with the informationization day by day of human society, the IT product rapid osmotic is to the various aspects of national economy, national defense safety and people's lives, increasing in numbers swiftly with product.
The basis of modern information technologies product is an integrated circuit (IC) chip, more and more higher at chip integration, function is from strength to strength the time, and the lines of its inside and the spacing of lines are but more and more trickleer, the result causes the ability of its withstand surge current/voltage more and more lower, and is responsive more to electric impulse.Therefore because the damage incident that surge current/voltage causes also is zooming trend.And information and networking products are the brain and the nerve of modern society, the economy that their fault is brought, and politics, or military loss is often very big.This objective situation has promoted developing rapidly of lightning protection and anti-overvoltage technology and product, and the current rush generator of simulation thunder and lightning direct effect occupies critical role in this technical field.
According to the regulation of technical standard GB18802.1/IEC61643-1/, the output current of the current rush generator of simulation thunder and lightning direct effect should meet following requirement: peak I p be setting ± 10%, peak dot time t
f≤ 50 μ S, quantity of electric charge Q=0.5I
p(AS), (Ip-kA), specific energy W/R=0.25I
p 2(KJ/ Ω) (Ip-kA), all uses peak dot time t at present
f≤ 50 μ S, the half-peak value time is roughly the index decreased current wave of 350 μ S as such current rush.Produce the waveform circuit of this current rush, the Crowbar circuit working oscillogram that all adopts so-called " Crowbar circuit " to see the circuit theory diagrams and the accompanying drawing 2 of accompanying drawing 1 in the past.
The course of work of Crowbar circuit is such: at first give storage capacitor C charging, at t
oConstantly make ball crack G1 igniting conducting, capacitor C is passed through inductance L
1, L
2Discharging current flow through sample DUT simultaneously, this electric current rises since 0, the electric field energy of capacitor C changes the magnetic field energy of inductance into.L
2Be main inductance, L
1Be used for correction signal, it is much smaller than L
2When capacitor C is discharged, L
2Both end voltage is A (+), B (-).At t1 constantly, the electric charge of capacitor C has all been put, and the voltage on the C drops to 0, so inductance produces back-emf, L
2On voltage become A (-), B (+), this voltage promote electric current to be continued to flow, the magnetic field energy of inductance begins to release.Just at this moment, make ball crack G2 igniting conducting, G2 is with capacitor C short circuit (so name Crowbar), L like this
2-DUT constitutes simple " inductance-resistance " leadage circuit, and discharge process depends on time constant (L
2/ r) (this r be meant the inductance that comprises the DUT equivalent resistance is let out can loop resistance).From top analysis as can be seen, electric field energy changes the electric current in the magnetic field energy process into, is exactly the wavefront time of DUT electric current.
The Crowbar circuit has two major defects: first, components and parts such as gas discharge tube that equiva lent impedance was very low when it only was applicable to conducting and air gap, when tested load is varistor, equiva lent impedance height during because of its conducting, output current wave substantial deviation setting; The second, its operating voltage is very high, for example requires charging voltage 100kV when output 10/350-100kA, and ball crack G1 triggers loop 200kV, and ball crack G2 is 300kV.
The difficulty that is faced when lifting an example explanation with Crowbar circuit test varistor below: example 1, tested load is a varistor, requires current peak Ip=20kA, about 0.3 Ω of the equiva lent impedance of tested varistor under test current.Adopt the Crowbar circuit of accompanying drawing 1:
(1), calculates inductance L 2
Inductance L 2 is through the leakage current of tested load
Resistance r in estimation current i (t) loop, it is tested thing equivalent resistance (about 0.3 Ω), the resistance of inductance L 2 (being assumed to 0.02 Ω), and the equivalent resistance of clearance G 2, the summation of connecting line resistance and contact resistance etc. is supposed r=0.35 Ω here.Because the half-peak value time of electric current is about 350 μ S, i.e. i (t)=0.5Ip during t=350 μ S.
With these data substitutions
Shi Kede L
2=177 μ H.
(2), calculate storage capacitor C
Because the peak dot time
Capacitance C=0.41t
f 2/ (L
1+ L
2)
If get (L
1+ L
2)=190 μ H, and t
f=50 μ S, substitution C=0.41t
f 2/ (L
1+ L
2) formula, can get C=5.4 μ F
(3), calculate charging voltage Uo
With Ip=20kA, L=190 μ H, C=5.4 μ F substitution
Formula, it is also high to get the charging voltage (100kV) of this voltage of Uo=118kV. compared with Ip=100KA current testing gas discharge device the time.High like this voltage, the ordinary test chamber is difficult to realize.
Above-mentioned example is told us, in the Crowbar circuit, because inductance value is by the decision of the equivalent resistance of tested thing, and the nonoptional leeway of designer, and capacitance is subjected to peak dot time t
fRestriction, can not select bigger numerical value for use, thereby the characteristic impedance in L-C loop
The numerical value height forces us to have to use high charge voltage, particularly when tested thing is the contour equivalent resistance element of varistor, and the high degree that is difficult to accept to the ordinary test chamber of charging voltage.
Summary of the invention
Technical problem to be solved by this invention is: overcoming existing Crowbar current rush generator can only the test gas discharge tube and voltage switch property component such as air gap, can not be with voltage clamp property components such as big discharging current test varistors, and operating voltage is too high, be difficult in shortcomings such as laboratory of general enterprise enforcements, a kind of long duration current rush generator that can be easily be complementary with various voltage clamp property components is provided, and the operating voltage with this generator is reduced to laboratory of general enterprise degree easy to implement simultaneously.
The technical solution adopted for the present invention to solve the technical problems is: a kind of inductance energy-releasing swashing current-generator, be used for tested thing is formed a current rush, include charge power supply, energy storage capacitor, capacitor discharge switch, waveform inductance and current control device, the positive and negative electrode of charge power supply connects the two ends of energy storage capacitor, the waveform inductance is in parallel with energy storage capacitor, the capacitor discharge switch series is connected on the loop of energy storage capacitor and the formation of waveform inductance, and current control device is serially connected on the loop of waveform inductance and the formation of tested thing.
Furtherly: 1) described current control device is a fly-wheel diode, or a kind of in atmospherical discharges gap, thyristor and the hydrogen brake pipe; When current control device is a kind of in atmospherical discharges gap, thyristor and the hydrogen brake pipe, make the enabling signal of the circuits for triggering of described current control device triggering and conducting, be the time delayed signal of capacitor discharge or the back-emf of waveform inductance.2) described capacitor discharge switch is a kind of in atmospherical discharges gap, thyristor, hydrogen brake pipe, contactor and the relay.
Principle to the technical program is described further below, and its course of work is at first by charge power supply energy storage capacitor to be charged, and deposits energy in energy storage capacitor; Connect the capacitor discharge switch then, energy storage capacitor is to the waveform inductive discharge, and the electric field energy of capacitor becomes the magnetic field energy of inductance; Again by the waveform inductance to tested thing or comprise the networking discharge of tested thing. because the control action of current control device, the discharging current of energy storage capacitor can not enter tested thing, and the electric current of tested thing is letting out of waveform inductance can electric current.
The invention has the beneficial effects as follows: the outstanding advantage of inductance energy-releasing swashing current-generator of the present invention is: because the electric current in the tested thing does not comprise the discharging current of energy storage capacitor, thereby the peak dot time of this electric current be not subjected to the restriction of condenser capacity, so can use big capacitance and low charging voltage.The reduction of charging voltage not only greatly reduces production cost and maintenance cost, has improved processing safety, and because the voltage changing rate (dv/dt) when having reduced discharge has been avoided the parasitic oscillation on the output current ripple, has improved waveform quality.Further can be summarized as the effect of following five aspects, 1) capacitance of energy storage capacitor can improve about 10 times, like this under the identical condition of the joule number of stored energy, charging voltage just can be reduced to below 1/3 (
); 2) can use the tested thing of big inductance quantity and high equivalent resistance coupling, solve the problem that the Crowbar circuit is difficult to test the tested thing of high equivalent resistance; 3) to begin the change in voltage speed (du/dt) of discharging time low for energy storage capacitor, do not have parasitic oscillation on the output current ripple, the waveform quality height; 4) manufacturing cost and day-to-day operation maintenance cost are low; 5) fail safe is good.
Description of drawings
The present invention is further described below in conjunction with drawings and Examples.
Fig. 1 is existing Crowbar circuit theory diagrams.
Fig. 2 is a Crowbar circuit working oscillogram.
Fig. 3 is circuit theory diagrams of the present utility model.
Fig. 4 is a circuit working oscillogram of the present utility model.
Fig. 5 is the circuit theory diagrams of specific embodiment of the utility model one.
Fig. 6 is the circuit theory diagrams of specific embodiment of the utility model two.
Embodiment
The theory diagram of contrast accompanying drawing 3 and the working waveform figure of accompanying drawing 4 specify the utility model below, at first be charged to voltage U o for storage capacitor C by dc charging power supply, (supposition polarity is last negative just down), the numerical value of Uo is to determine according to impedance and the desired current peak of tested thing DUT.
At t
oConstantly connect K switch, capacitor C is to the discharge of waveform inductance L, because the iris action of current control device KI, the discharging current of C can not enter DUT, current i in this process
LRise voltage u since 0
L(polarity is last negative just down) begins to descend from Uo.At t
1Constantly, the electric charge that stores on the capacitor C has all been put, u
c=u
L=0, i
c=i
L=Ip, promptly electric current reaches maximum.
At t
1Inductance L produces back-emf, u constantly
LOppositely (polarity be last negative down just), inductance is given the capacitor reverse charge, and this moment, current control device KI was short circuit to the leakage current of inductance L, because the impedance of DUT and KI is much smaller than the impedance of capacitor C, thereby letting out of inductance can current i
LBe exactly i substantially
DUT, and voltage u
LThen the impedance operator by tested thing DUT is determined, this process is performed until the leakage current i of inductance L
LLess than KI keep electric current the time just stop.What the working waveform figure in the accompanying drawing 4 was represented is that DUT is the situation of clamper characteristic element.
Circuit diagram and i from accompanying drawing 3 and 4
DUTOscillogram as can be seen because i
DUTJust letting out of inductance can electric current, and its rising front is mainly determined by the distributed capacitance of inductance L and the input capacitance amount of tested thing DUT, is not subjected to the restriction of storage capacitor C, thereby can uses big capacitance C, low operating voltage.
Introduce two kinds of specific implementation methods below again:
Accompanying drawing 5 is one embodiment of the present of invention, and current control device KI is a sustained diode in this example, and DUT is tested thing among the figure, L is the waveform inductance, C is an energy storage capacitor, and K is the discharge switch of energy storage capacitor, and charge power supply is the adjustable power of direct current of arbitrary form.Earlier fill the voltage U o of requirement with to C during work by charge power supply, press then and start button AN, by control circuit KZ K switch 1 is connected, capacitor C is discharged to inductance L, treat that institute accumulate lotus has been put on the C after, when inductance L produces back-emf, promote an electric current and flow through tested thing DUT and sustained diode, the waveform of this electric current is determined by the impedance operator of inductance L and DUT.
Embodiment 2
Accompanying drawing 6 is an alternative embodiment of the invention, and current control device KI is trigger sphere gap G2 in this example, and the capacitor discharge switch is trigger sphere gap G1.Press and start button AN, firing pulse of circuits for triggering Tr1 output is given G1, so G1 punctures conducting, capacitor C is discharged to inductance L, treat that institute accumulate lotus has been put on the C after, inductance L produces back-emf, this back-emf makes firing pulse of circuits for triggering Tr2 output give G2, so G2 punctures conducting, inductance L promotes an electric current and flows through tested thing DUT and ball crack G2, forms the current wave that requires.The discharge voltage that diode D among the figure intercepts capacitor C enters Tr2.
Claims (4)
1. inductance energy-releasing swashing current-generator, be used for tested thing is formed a current rush, it is characterized in that, include charge power supply, energy storage capacitor, capacitor discharge switch, waveform inductance and current control device, the positive and negative electrode of charge power supply connects the two ends of energy storage capacitor, the waveform inductance is in parallel with energy storage capacitor, and the capacitor discharge switch series is connected on the loop of energy storage capacitor and the formation of waveform inductance, and current control device is serially connected on the loop of waveform inductance and the formation of tested thing.
2. inductance energy-releasing swashing current-generator according to claim 1 is characterized in that: described current control device is a fly-wheel diode.
3. inductance energy-releasing swashing current-generator according to claim 1, it is characterized in that: described current control device is a kind of in atmospherical discharges gap, thyristor and the hydrogen brake pipe, make the enabling signal of the circuits for triggering of described current control device triggering and conducting, be the time delayed signal of capacitor discharge or the back-emf of waveform inductance.
4. inductance energy-releasing swashing current-generator according to claim 1 is characterized in that: described capacitor discharge switch is a kind of in atmospherical discharges gap, thyristor, hydrogen brake pipe, contactor and the relay.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200610096125A CN1929282B (en) | 2006-09-19 | 2006-09-19 | Inductance energy-releasing swashing current-generator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200610096125A CN1929282B (en) | 2006-09-19 | 2006-09-19 | Inductance energy-releasing swashing current-generator |
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| Publication Number | Publication Date |
|---|---|
| CN1929282A CN1929282A (en) | 2007-03-14 |
| CN1929282B true CN1929282B (en) | 2010-05-12 |
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ID=37859123
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|---|---|---|---|
| CN200610096125A Expired - Fee Related CN1929282B (en) | 2006-09-19 | 2006-09-19 | Inductance energy-releasing swashing current-generator |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102135575B (en) * | 2010-01-27 | 2013-06-19 | 中国电信股份有限公司 | Testing device and method for lightning protection capacity of modem terminal |
| CN103048570B (en) * | 2012-12-25 | 2015-01-28 | 武汉大学 | Direct effect testing device for lightning current |
| CN103675375B (en) * | 2013-12-31 | 2016-08-24 | 上海交通大学 | Inductive discharge high-gradient impact current generator |
| CN109406845B (en) * | 2015-09-08 | 2020-12-18 | 苏州泰思特电子科技有限公司 | High-efficiency impulse current generator |
| CN109283464B (en) * | 2018-10-18 | 2021-01-19 | 许继集团有限公司 | Thermal running test device for thyristor converter valve |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1247644A (en) * | 1997-12-25 | 2000-03-15 | 三菱电机株式会社 | Pulse power source appts. |
| CN2443536Y (en) * | 2000-10-12 | 2001-08-15 | 常州市创捷防雷电子有限公司 | Impact current generator |
-
2006
- 2006-09-19 CN CN200610096125A patent/CN1929282B/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1247644A (en) * | 1997-12-25 | 2000-03-15 | 三菱电机株式会社 | Pulse power source appts. |
| CN2443536Y (en) * | 2000-10-12 | 2001-08-15 | 常州市创捷防雷电子有限公司 | Impact current generator |
Non-Patent Citations (1)
| Title |
|---|
| JP平10-327049A 1998.12.08 |
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|---|---|
| CN1929282A (en) | 2007-03-14 |
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| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| ASS | Succession or assignment of patent right |
Owner name: CHANGZHOU CITY CHUANGJIE LIGHTNING ELECTRONICS CO Free format text: FORMER OWNER: ZHANG NANFA; APPLICANT Effective date: 20070608 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20070608 Address after: Baiyun Lu Hong Zhuang Industrial Park 213016 Building No. 6 Jiangsu city of Changzhou Province Applicant after: Changzhou ChuangJie Lightning Protection Co., Ltd. Address before: 213016 Room 601, unit 183, six village, Qing Tan Village, Jiangsu, Changzhou Applicant before: Zhang Nanfa Co-applicant before: Zhang Min Co-applicant before: Zhang Mei |
|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100512 Termination date: 20150919 |
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| EXPY | Termination of patent right or utility model |