CN203219254U - Shielding shelter used intelligent filter preventing electromagnetic pulses and resisting surges - Google Patents
Shielding shelter used intelligent filter preventing electromagnetic pulses and resisting surges Download PDFInfo
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- CN203219254U CN203219254U CN 201320091099 CN201320091099U CN203219254U CN 203219254 U CN203219254 U CN 203219254U CN 201320091099 CN201320091099 CN 201320091099 CN 201320091099 U CN201320091099 U CN 201320091099U CN 203219254 U CN203219254 U CN 203219254U
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Abstract
The utility model relates to a shielding shelter used intelligent filter preventing electromagnetic pulses and resisting surges, which comprises a shielding box, wherein the shielding box is internally provided with a shielding chamber filter, an EMP (electromagnetic pulse) generator and a digital oscilloscope, an input end of the shielding chamber filter is connected with the EMP generator, an output end of the shielding chamber filter is connected with the digital oscilloscope, the shielding box is further provided with an EMI (electro-magnetic interference) filter, and the EMI filter is internally provided with a difference mode inductor and a common mode inductor. The electromagnetic pulse filter provided by the utility model analyzes the clamping characteristics and the insertion loss of the electromagnetic pulse filter in a simulated manner by using PSpice. The filter provided by the utility model can attenuate the EMP to a safe level without a need of using TVS and MOV auxiliary components, and is reliable in use.
Description
Technical field
The present invention relates to a kind of filter, relate in particular to a kind of filter and method thereof that prevents electromagnetic pulse.
Background technology
The energy of high-altitude nuclear electromagnetic pulse (HEMP), Lightning Electromagnetic Pulse electromagnetic pulses such as (LEMP) is huge, and rising edge is extremely short, and spectrum distribution is extremely wide, and they are propagated by conduction and radiation dual mode, and filter is a kind of technical measures that suppress conducted interference.Yet, common filter can not play inhibitory action to them, even can be broken, thereby makes a lot of electronic equipment cisco unity malfunctions, especially as the shelter of Field Operational command centre, it is very necessary to design the filter with tempest ability.
A large amount of actual measurements and theoretical research prove, nuclear explosion takes place, and when particularly nuclear explosion in high altitude taking place, follow short time (at the us order of magnitude) strong electromagnetic radiation to occur, and we call electromagnetic pulse (EMP) to this special electromagnet phenomenon.
Through measuring and calculating, the nuclear explosion in high altitude of 100,000 tons of equivalents, the whole energy that produce are about the 4.2*10+15 joule, wherein, be about the 10+11 joule with what electromagnetic energy radiate, this is very huge energy, it can make the backwoodsman electronic equipment that influenced by EMP afford the impact of the above EMP energy of erg-ten, EMP energy much smaller than erg-ten just is enough to make a lot of electronic components to completely lose ability to work, for example, only need the EMP energy impact of 2*10-5 joule, integrated circuit MC71S was lost efficacy; Only need the 2*10-7 joule that microwave diode IN238 is burnt, the harassing and wrecking electronic circuit and make it can not steady operation the EMP energy lower, for example, EMP energy that only need the 4*10-10 joule just can make the J – K trigger of SF – 50 dap; Only need the EMP energy of 2 * 10-9 joule just can make FC2001 memory in the computer get to deposit and make mistakes, therefore, the damage of the research electronic devices and components of EMP and equipment and their protection, meaning is very great.
For preventing the breaking-up of the electronic equipment of EMP and system, they power line and holding wire on filter will be set, we are called the EMP filter to this filter.
By multiple electromagnetic interface filter being loaded the experiment of EMP signal, checked auxiliary elements such as transition inhibition or piezo-resistance to the control ability of EMP, Primary Study result shows, well-designed electromagnetic interface filter, auxiliary element without transition inhibition (TVS) or piezo-resistance (MOV) and so on still has good restraining ability to EMP.
By traditional way, conventional electromagnetic interface filter adds the electronic component that transition suppresses (TVS) or piezo-resistance (MOV), just can make the EMP filter, such filter can protect the electronic equipment of EMP and system, also can protect the destruction that thunder and lightning causes under the certain condition, as the induction lightening signal, still, so the EMP energy that such filter bears is very limited, to the filter made from TVS, because the impact energy that TVS can bear is limited, runs into the big harassing and wrecking of energy, can cause that clamp current sharply increases, power consumption increases severely, TVS will damage, and causes the inefficacy of EMP filter, thereby can not protect the destruction of the equipment of EMP and system.For the MOV element, the impact energy that it can bear can be bigger than TVS,, whenever stands the impact of EMP or thunder and lightning, and its performance can descend.The impact that stands about 10 times just might be lost efficacy, and forfeiture is to the protective capacities of EMP and thunder and lightning.
Summary of the invention
Main purpose of the present invention is, overcome the defective that existing filter exists, and provide a kind of novel shielding shelter with intelligent tempest, antisurge filter, technical problem to be solved is the reliability of raising equipment, strong shock resistance, thereby be suitable for practicality more, and have the value on the industry.
The object of the invention to solve the technical problems realizes by the following technical solutions.A kind of shielding shelter that proposes according to the present invention is with intelligent tempest, antisurge filter, comprise shielding box, be provided with shielded enclosure filter, EMP generator and digital oscilloscope in the described shielding box, the input of described shielded enclosure filter links to each other with the EMP generator, the output of described shielded enclosure filter links to each other with digital oscilloscope, described shielded enclosure box also is provided with electromagnetic interface filter, comprises differential mode inductance and common mode inductance in the described electromagnetic interface filter.
Aforesaid shielding shelter links to each other by shielded type cable with the EMP generator with intelligent tempest, antisurge filter, the input of described shielding box filter.
Aforesaid shielding shelter has ground network with intelligent tempest, antisurge filter, described shielding box outer setting.
Aforesaid shielding shelter is provided with attenuator with intelligent tempest, antisurge filter, the interior end that is connected with electromagnetic interface filter of described shielding box.
Aforesaid shielding shelter is provided with resistance with intelligent tempest, antisurge filter in the described shielding box.
Aforesaid shielding shelter has two at least with intelligent tempest, antisurge filter, the resistance that arranges in the described shielding box.
By technique scheme, the present invention shields shelter and has following advantage at least with intelligent tempest, antisurge filter:
Electromagnetic pulse filter of the present invention, utilized the PSpice simulation analysis electromagnetic pulse filter the clamp characteristic and insert loss, this filter need use TVS and MOV auxiliary element, but EMP can be decayed to safe level, uses reliably.
Above-mentioned explanation only is the general introduction of technical solution of the present invention, for can clearer understanding technological means of the present invention, and can be implemented according to the content of specification, below with preferred embodiment of the present invention describe in detail as after.
Embodiment
Reach technological means and the effect that predetermined goal of the invention is taked for further setting forth the present invention, the shielding shelter that foundation the present invention is proposed is with intelligent tempest, its embodiment of antisurge filter, feature and effect thereof, describe in detail as after.
The intelligent tempest of shielding shelter of the present invention, the antisurge filter, comprise shielding box 2, be provided with shielded enclosure filter 7 in the shielding box 2, EMP generator 3 and digital oscilloscope 10, the input of shielded enclosure filter 7 links to each other by shielded type cable 12 with EMP generator 3, the output of shielded enclosure filter 7 links to each other by shielded type cable 12 with digital oscilloscope 10, digital oscilloscope 10 is arranged in the shielded enclosure 1, also be provided with electromagnetic interface filter 5 in the shielding box 2, comprise differential mode inductance 13 and common mode inductance 14 in the electromagnetic interface filter 5, shielding box 2 outer setting have ground network 8, the shielding box 2 interior ends that are connected with electromagnetic interface filter 5 are provided with first attenuator 6, the shielding box 2 interior ends that are connected with EMP filter 3 are provided with second attenuator 11, also are provided with first resistance 4 and second resistance 9 in the shielding box 2.
The comparative example
At first, the electromagnetic interface filter 5 that electromagnetic interface filter 5 is placed in standard code inserts in the loss test shielding box 2, with shielded enclosure 1, shielding box 2, EMP generator 3, first resistance 4, electromagnetic interface filter 5, the first attenuators 6, shielded enclosure filter 7, ground network 8, the second resistance 9, digital oscilloscope 10, second attenuator 11, with shielded type cable 12 input and output of tested filter are connected with digital oscilloscope 10 with EMP generator 3 respectively, arrangement is to generate induced voltage for fear of the electromagnetic radiation that EMP generator 3 produces at the input and output cable like this, has influence on test result.
Secondly, be that output amplitude can reach 250,000 volts Shuangzi and counts waveform EMP generator 4 as the source of experiment, the height of output EMP amplitude can be controlled by input voltage, for the EMP amplitude that obtains the being fit to input voltage as electromagnetic interface filter 5, also at the output of EMP generator 3, the method for employing and water receiving electric resistance partial pressure is further regulated and control the input voltage of filter.
The 3rd, accurate recording for the input and output side voltage magnitude that guarantees tested electromagnetic interface filter 5, digital oscilloscope 10 is placed in the EM shielded room 1, the influence that the radiation that release EMP generator 3 produces causes measurement result, sampled signal from filter input end and output also will be passed through suitable attenuator, through receiving the input port of digital oscilloscope behind the wave guide through walls, the waveform that assurance is recorded to is in oscillographic range ability, also with computer the input and output side voltage magnitude is handled, then, input and output side waveform visual pattern be illustrated in the width of cloth figure.
A common single-phase 250V/50Hz60A electromagnetic interface filter 5 is installed on the filter location, this filter suppresses electric capacity (Cx) by common mode (CM) inductance, common mode inhibition electric capacity (Cy) and differential mode and forms, during experiment, EMP is added between the phase line (L) or center line (N) terminal and ground (being shell) of input, accurate in order to guarantee to test, connector on the cable that is connected with the EMP source and electromagnetic interface filter 5 shielding cases all should adopt and can bear high-tension product, before experiment, check not have puncture and corona phenomenon and take place with 10,000 volts of direct voltages.
In addition, have electromagnetic coupled between its input and output terminal, its frequency is more high, and this coupling can be more strong.Because the rising front of several kilovolts EMP signal only is about 10ns, just has energy is directly coupled to it from the input of filter output.This also is that the ability of its control EMP becomes very poor one of reason, and obviously, it can not realize controlling the task of EMI and EMP simultaneously.
Embodiment 1
Behind the result who analyzes with common electromagnetic interface filter loading EMP testing, we improve design, have developed the electromagnetic interface filter 5 of a kind of single-phase 250V/50Hz, 60A.
This is a kind of multistage electromagnetic interface filter 5 that contains differential mode inductance 13 and common mode inductance 14, the Cy capacitor adopts feedthrough capacitor, experimentize by the installation of above-mentioned electromagnetic interface filter 5 and the method for loading EMP, and the waveform of input and output is delivered to computer handle, enable in same width of cloth figure, their waveform to be compared.
When input EMP amplitude was 3500V, the amplitude of filter output is 320V, and was apparent, the ability that it controls EMP is better than common electromagnetic interface filter 5, this is that inductance core is difficult for saturated, and the insertion loss of filter low side is obviously improved because the differential mode inductance overload capability of special development is strong.Need not to add under the condition of TVS and MOV element, just can realize the good control to the EMP signal.This is the desired EMP filter of user just.
During experiment, have electromagnetic coupled between its input and output terminal, reduced the decay to EMP, can when using installation, manage to improve, for example, utilize the existing shielding of equipment or system, the input and output terminal of filter is kept apart, make the electromagnetic coupled between them be controlled to minimum, Here it is a kind of easy capable effective method.
Let us be expected, there is feed-through capacitor miscellaneous to be widely used in electronic equipments such as communication, navigation, radar, Aero-Space, naval vessel, tank, shelter and the system, evident characteristic in application is that the shell of feed-through capacitor organically combines together with the shielding of equipment or system, make the electromagnetic isolation between the input and output terminal of filter good, so, the ability of their control EMP how
In order to understand fully this problem, we have selected two kinds structure is identical and punching filters that parameter is different are controlled the test of EMP, this installation method has reflected practical situations faithfully, though electromagnetic interface filter 5 can be the level of EMP signal controlling to customer requirements, whether can better control their distributed constant of filter of EMP signal in addition, be that distributed inductance and distributed capacitance are roughly the same, main difference between them is two ends lumped parameter capacitor volume differences, is 2 * 1uF during A group parameter; Be 2 * 4.7uF during B group parameter, the insertion loss ratio A of the insertion loss characteristic B group parametric filtering device low frequency end of the two organizes the good a lot of of parameter, result of upper experiment obviously illustrates, the capacitance of its feed-through capacitor is more big, the ability of its control EMP is just more strong, this is because be added on the capacitor of filter input end when the signal of the such fast transient of EMP after, voltage on the capacitor is can not follow variation at once, the variation of its voltage will be followed following rule, be △ V=△ Q/C, △ V is the rate of change of condenser voltage, and △ Q is the rate of change of electric charge on the capacitor, △ Q is a constant, when the reference record of test B group was 7440V, the output amplitude that records was 100V, is not difficult to find out from following formula, 74.4 times have been reduced than input range, therefore, capacity is more big, the variation of voltage, be that △ V will be more little, Here it is, and why B group parametric filtering device is organized the good reason of parameter to the control ability of EMP than A.
Press traditional concept, any test that surpasses the filter puncture voltage all is that strictness is forbidden, because it can cause the punch through damage of filter, we are studying this Filter Structures and parameter, after analyzing the characteristic of EMP signal, repeatedly load the back except the diameter of center conductor is slightly different, the parameter of filter is not observed significant change, when the amplitude of EMP was 6912V, its output amplitude was 300V, and output waveform obviously postpones, and the duration is more a lot of than having imported the waveform broadening, if only investigate the variation of amplitude, reached the decay more than 23 times, as seen it is fine to the inhibition ability of EMP.
1. the present invention is under the condition of not using MOV and TVS element, and the electromagnetic interface filter 5 that designs well can be controlled EMI equally, can control to very low level to the interference magnitude of EMP again, satisfies the requirement of relevant devices and system.
2. in the punching filter being carried out the EMP test and analyzing, confirm, can load than the high a lot of EMP amplitude of its puncture voltage and can not damage any parameter, this is our discovery in practice, thereby rewritten the traditional concept that can not load above the EMP signal of test voltage amplitude, when application conditions allows with jumbo punching filter, can control to quite low level to EMP.
3. in practicality, note the laying and ground connection of installation, cable of filter.
The above, it only is preferred embodiment of the present invention, be not that the present invention is done any pro forma restriction, though the present invention discloses as above with preferred embodiment, yet be not in order to limit the present invention, any those skilled in the art, in not breaking away from the technical solution of the present invention scope, when the technology contents that can utilize above-mentioned announcement is made a little change or is modified to the equivalent embodiment of equivalent variations, in every case be the content that does not break away from technical solution of the present invention, any simple modification that foundation technical spirit of the present invention is done above embodiment, equivalent variations and modification all still belong in the scope of technical solution of the present invention.
Claims (6)
1. a shielding shelter is with intelligent tempest, antisurge filter, comprise shielding box, be provided with shielded enclosure filter, EMP generator and digital oscilloscope in the described shielding box, the input of described shielded enclosure filter links to each other with the EMP generator, the output of described shielded enclosure filter links to each other with digital oscilloscope, it is characterized in that: described shielded enclosure box also is provided with electromagnetic interface filter, comprises differential mode inductance and common mode inductance in the described electromagnetic interface filter.
2. shielding shelter according to claim 1 is with intelligent tempest, antisurge filter, and it is characterized in that: the input of described shielding box filter links to each other by shielded type cable with the EMP generator.
3. shielding shelter according to claim 1 is with intelligent tempest, antisurge filter, and it is characterized in that: described shielding box outer setting has ground network.
4. shielding shelter according to claim 1 is characterized in that with intelligent tempest, antisurge filter: being connected to hold with electromagnetic interface filter in the described shielding box is provided with attenuator.
5. shielding shelter according to claim 1 is characterized in that: be provided with resistance in the described shielding box with intelligent tempest, antisurge filter.
6. shielding shelter according to claim 5 is characterized in that with intelligent tempest, antisurge filter: the resistance that arranges in the described shielding box has two at least.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN 201320091099 CN203219254U (en) | 2013-02-27 | 2013-02-27 | Shielding shelter used intelligent filter preventing electromagnetic pulses and resisting surges |
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201320091099 CN203219254U (en) | 2013-02-27 | 2013-02-27 | Shielding shelter used intelligent filter preventing electromagnetic pulses and resisting surges |
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| CN203219254U true CN203219254U (en) | 2013-09-25 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104201878A (en) * | 2014-09-03 | 2014-12-10 | 山东超越数控电子有限公司 | Design method for optimizing filter to suppress switching noise |
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2013
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104201878A (en) * | 2014-09-03 | 2014-12-10 | 山东超越数控电子有限公司 | Design method for optimizing filter to suppress switching noise |
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| 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: 20130925 Termination date: 20150227 |
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| EXPY | Termination of patent right or utility model |