CN102647894A - Electromagnetic shielding device for signal line control circuit protector with power surge protector - Google Patents
Electromagnetic shielding device for signal line control circuit protector with power surge protector Download PDFInfo
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- CN102647894A CN102647894A CN2010101098795A CN201010109879A CN102647894A CN 102647894 A CN102647894 A CN 102647894A CN 2010101098795 A CN2010101098795 A CN 2010101098795A CN 201010109879 A CN201010109879 A CN 201010109879A CN 102647894 A CN102647894 A CN 102647894A
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Abstract
The invention discloses an electromagnetic shielding device for a signal line control circuit protector with a power surge protector. The electromagnetic shielding device is characterized in that an inner shielding body with 1-5 layers and an outer shielding body are of a closed edge-free box structure; a power surge protector (SPD) is arranged between the inner shielding body and the outer shielding body made of low-carbon steel plates with the manufacturing thickness of 10mm; by virtue of the signal line control circuit protector (SPD), current inducted by a high-intensity magnetic field is prevented from entering the shielding bodies along a power supply and signal cable; the power surge protector (SPD) connected with a grounding conductor of the shielding bodies is in grounding or equipotential connection, high current which is instantaneously inducted on the surface of the shielding bodies in the high-intensity magnetic field is discharged, a non-conductive and non-magnetic fixing framework is used for fixing the inner and outer shielding bodies, wire inlet and outlet holes are in a corresponding relationship and are not on the same line, and outward push-and-pull doors are arranged on the side surfaces of the shielding bodies. The electromagnetic shielding device is novel in design, ingenious in combination and easy to mount, and the shielding requirements on the high/low frequency magnetic field are met.
Description
Technical field
The present invention relates to power source surge protector (SPD); Holding wire, control circuit protector (SPD); Electromagnetic screen.Refer in particular in a multilayer screen device and between the external shielding body, arrange power source surge protector (SPD); Arrange holding wire, control circuit protector (SPD); The electric current that the high-intensity magnetic field that stops the electromagnetic pulse weapon blast to produce induces along power supply, signal cable gets in the shield; External shielding body and power source surge protector (SPD) in earth lead connects; Connect through ground connection or equipotential, bleed off the strong-electromagnetic field huge current flow that moment induces on interior external shielding body surface.
Background technology
Electromagnetic pulse (EMP) is a weakness of utilizing the intrinsic electromagnetic property of parts in the electronic system, can a large amount of electronic equipments and electronic system paralysis or quilt destroyed in moment.
One, electromagnetic pulse classification
1, to be called nuclear electromagnetic pulse nuclear electromagnetic pulse (HEMP) be the electromagnetic pulse that excites ionized atmosphere to produce by the gamma-rays that the nuclear explosion of 30～500km overhead produces to the electromagnetic pulse that produces of nuclear explosion, therefore also becomes high-altitude electromagnetic pulse.The amplitude of HEMP depends on the equivalent of nuclear explosion; This pulse rises to 019 of peak value from 011 of peak value and only needs 5ns; Face drops to peak value from the top the half the needed time is about 200ns; Therefore the frequency spectrum of its covering is very wide; Almost put down from 10kHz～1MHz, HEMP peak value field intensity height, the rise time ground scope fast, that cover that reduces the nuclear explosion in high altitude generation from 1～100MHz gradually is wide, can on millions of square kilometres region, produce very strong HEMP (electric field strength 50～100kV/m).(list of references " airplane design " in October, 2008; Article numbering: 1673-4599 (2008) 05-0059-03)
2, NON-NUCLEAR ELECTROMAGNETIC PULSE (EMP) then utilizes the energy that explosive charge or chemical fuel burning produce; Converting high power microwave radiation to through microwave device can; Can emission peak power more than gigawatt, frequency is the pulse microwave bundle of 1 gigahertz (GHZ)～300 gigahertz (GHZ)s; Go up the transient voltage that sharply produces thousands of volts at exposed electric conductor (for example exposed electric wire, the track of printed circuit board (PCB)), a large amount of electronic equipments are caused the damage that to retrieve.
3, Lightning Electromagnetic Pulse (LEMP) is powerful lightning stream and the electromagnetic field thereof as interference source that sky produces when thundering.Its induction range is very big, to computer and traffic guidance system and various electric equipment and pipeline harm in various degree can be arranged all.
Two, the characteristics of electromagnetic pulse weapon: electromagnetic pulse weapon is compared with traditional weapon as a kind of new concept weapon, in basic principle, kill and wound destructive power and all have remarkable different with aspects such as the modes of operation.Its unique distinction also is:
1, target kill is polynary: electromagnetic pulse weapon can disturb and destroy the nearly all electronic equipments such as aircraft, radar, computer, phone and mobile phone in the tens of kms of radius.The strong electromagnetic pulse that gives off can also produce induced current through being exposed to ground antenna, creeps into undergroundly always, destroys various hidden electronic equipments in underground installation.
2, cost effectiveness is high: the EMP bomb is with low cost, makes one piece of common compact electromagnetic pulse bomb and only needs the hundreds of dollar, far below conventional bomb.And carry one piece of EMP/T Bomb with cruise missile, and only need set out a sortie, just can hit a plurality of targets simultaneously.
3, flat pad is various: generally with aircraft, the naval vessels carrier that delivery is thrown as electromagnetic pulse weapon, and also can be with large caliber gun or rocket launching.U.S. Air Force Project all loads onto the EMP bomb for bomber, fighter plane, cruise missile and UAV.
4, have soft, hard two kinds of killing abilities: both can implement electronic jamming to enemy's command and control system, radar system, communication apparatus; Make its detection, control and communication equipment blinding, cause deaf, cause mute; Also can regularly, fixed point give enemy's radar system, communication equipment etc. are with fatal destruction.
5, can reach tactics, strategic purpose: tactics type EMP bomb mainly carries out clearly, attacks targetedly some fixed targets, and target selection has popularity, and tactics application has flexibility.Strategy type EMP bomb is primarily aimed at enemy state's strategic objective, as high-intensity bombing is implemented in capital, industrial important city etc., causes the other side commander's paralysis, message interrupts of overall importance, destroys enemy state and produces normally and life, applies huge psychological pressure to the common people.(list of references: " aerospace electron antagonism " the 22nd the 6th phase of volume, middle figure classification number: TN974; TJ864, file identification sign indicating number: A)
6, the strike to consumer electronic device also is huge: savings and account system all paralyse, and phone, mobile phone are silent, and traffic lights are malfunctioning, and air line can not move ... Country all could paralyse in all cities! Suffer the country of this strike, can get back to 200 years overnight before! (list of references: the military channel of www.china.com " U.S. 2012 comprehensively equipment pulse weapon get the jump on Sino-Russian before "
Three, four aspects of electromagnetic pulse protection
1, shielding: shielding is the transmission that utilizes shield to stop or reduce electromagnetic energy, reaches a kind of important means of electromagnetic protection, and this shield does not allow electromagnetic field to arrive protected equipment.But all electronic equipments all will obtain electric power, also all will communicate by letter with the external world, and these inlet points are that the entering of the electric transient process of high energy ELECTROMAGNETIC WEAPON provides chance.
2, ground connection processing is that electronic equipment is connected with the earth with approach through appropriate method; To improve the stability of electronic device circuitry system works; Suppress the influence of external electromagnetic field effectively, avoid the casing electric charge to accumulate too much guiding discharge and the interference and the damage that cause.
3, filter: filter can be by one type of resistance, inductance, electric capacity passive or active device form selective network, pass through to stop all the other compositions outside the useful band, accomplish filter action; Also can form, sponge undesirable frequency content, reach the effect of filtering by it by one type of lossy material of ferrite.(list of references: " space electronic technology " the 3rd phase in 2004 < electromagnetic pulse weapon principle and protection thereof >)
4, technical safeguard: U.S. army has used a kind of lightning arrester with wire now, can effectively reduce the interfering energy of strong electromagnetic pulse.(< marine electronic engineering>2004 the 24th middle figure of volume " military electronics are for the protection of strong electromagnetic pulse " classification number: 0441.4)
Five, the serial surge filtering product technology of the SINETAMER of produced in usa (hereinafter to be referred as the S series of products) is introduced
The S series of products are that world-leading electric power purifies, precision instrument is protected, power surge filtering protection product.The patented technology of its sinusoidal wave tracking filter and special chemistry encapsulation comprises surge protection and filtering technique, meets very much the specification requirement of electromagnetic pulse protection.At ground force, naval, the army of air force and the extensive use S of frontier guards series surge filtering protection product, S series surge filtering protection product has following advantage to US military:
1, multistage preventing mechanism, residual voltage can reach 0V through the surge voltage of water conservancy diversion generally between 2.5KV～15KV, after the SPD product that is equipped with should pass through multistage protection, reach extremely low residual voltage, special industry can reach 0 volt.The general surge protection product in market, maximum through-flow 40KA, GB residual voltage value is 1800.S product 40KA impacts, and the residual voltage value is less than 600V.Residual voltage is more little, and the protection effect is good more.Under 8/20us simulation thunder and lightning test environment, charging voltage 24.9KV, current peak 47.8KA, residual voltage value 551V is much smaller than the home products standard.
2, response speed is less than 1 nanosecond, effectively protect secondary thunder, induction thunder and and the electric inside Transient Voltage Suppressor that shoves be called for short TVS.The TVS diode response time is less than 1 nanosecond.The piezo-resistance response speed that other surge protection product adopts was 25 nanoseconds.The TVS advantage: bidirectional protective characteristic, response speed fast (nanosecond order), absorb surge power big (transient power reaches thousands of watts), clamping voltage is easy to control, leakage current is low, do not have the limit of damage, volume is little.
3, shell adopts NEMA 4 standards, waterproof, fire prevention, explosion-proof, antistatic.
4, the sinusoidal wave ORN tracking technique of patent is accurately eliminated surge, humorous wave energy.Traditional product is to adopt to descend traditionally the filtering of clamp-type threshold values, and pressure-sensitive characteristic is conducting over the ground when voltage reaches threshold values, thereby reaches the purpose of leakage current.The S product adopts the sinusoidal wave tracking filter of patented technology enhancement mode ORN, by certain sinusoidal wave positive and negative skew percentage, follows the tracks of and eliminates surge " stolen goods ", purify power utilization environment, and the residual voltage value is very low.In computer communication system, electronic equipment, electromagnetic pulse is coupled in the circuit through lead and goes, thereby the energy conduction of product overvoltage is in the line disturbed to the equipment, damage equipment.Energy shows as overvoltage during the lead coupling.The ORN filtering technique resists scope through the tracking technique filtering voltage, and " cleaning " of the power supply of assurance, signal makes computer system, electronic equipment etc. avoid the interference and the damage of electromagnetic pulse.
5, unique chemistry encapsulation patented technology, the voltage tester of the unfailing performance 500V that the guarantee device is lasting does not have MOV48 temperature second of chemical packaging protection to rise to 200 ℃, and the test that continues can make MOV blast at short notice.And through after the special chemistry encapsulation, the voltage tester of 500V, 3 minutes 30 seconds temperature of MOV of the chemical packaging protection of process remain on 105 ℃, and remain on a little temperature always.And particular chemical sealing, can absorb the heat that produces in the surge process rapidly, protection product components and parts prolong device useful life.In the electromagnetic pulse coupling process, energy is very big, and is also very high to the electronic component device requirement of filter apparatus.And the special chemistry sealing of S product is shifted energy through distribute heat, has guaranteed the useful life of components and parts, thereby system safety is dared in protection.
6, real 10 moulds (full mould) are protected, and blocking-up surge institute might passage.For military equipment, require to carry out between line and the line filtering protection.The full mould protection of S product has been blocked line and line, all possible passage of line and ground, thereby equipment has been played perfect protection
7, mix the diversification module, hot, electric dual fail-safe fusing capacitor design.
8, unique can be earth-free surge protection product X product adopt the sinusoidal wave tracking technique of patent, special chemistry encapsulation, and nanosecond TVS element, ten moulds protection and mix the diversification module makes the S product not release energy through ground connection.Because full mould protection, the energy that totally 70 MOV, every MOV share is fewer.When the outside does not have ground connection, MOV can discharge the energy of surge through the heating of self when absorbing surge.And the particular chemical encapsulation, can absorb the heat that MOV produces rapidly, guarantee the MOV components and parts.Thereby making product can under unearthed situation, carry out energy discharges.When the S product can not ground connection, require ground wire to do equipotential and connect.In the mobile device in military communication system, because the character that moves has determined that the equipment ground system will be perfect not to the utmost.And traditional surge filtering product all needs the ground connection of high request.The S product can be accomplished surge filtering protection under earth-free situation, more adapt to army's maneuver warfare requirement.(list of references: U.S. ECS company " SINETAMER series of products specification ")
Six, the equipment situation of various countries army electromagnetic pulse weapon
Septic yanks are comprehensive equipment pulse weapon in 2012, get the jump on Sino-Russian before.2004, U.S. army began electromagnetic pulse weapon of new generation is carried out extensive testing, and the electromagnetic pulse weapon cost that plan involves great expense is the most at present reduced to about 400 dollars.(list of references: the military channel of www.china.com " U.S. 2012 comprehensively equipment pulse weapon get the jump on Sino-Russian before ")
Seven, the kind of electromagnetic shielding
1, frequency electromagnetic waves shielding, the main employing absorbs and principle of reflection, and frequency electromagnetic waves produces strong eddy current effect and electromagnetic wave is absorbed when running into the metallic shield body, simultaneously because its wave impedance is very high, frequency electromagnetic waves generation reflection loss.
2, magnetostatic field shielding: magnetic field is during through a closed high magnetic conduction shield, because the permeability of shield is very high, magnetic resistance is very low, and magnetic field can be through the derivation of magnetic screen path, and the magnetic field of the shield that bleeds is significantly reduced.
3, ultralow frequency electromagnetic shielding is main with the magnetic shielding principle mainly, will consider electromagnetic compatibility simultaneously, also has the shielding action that the part eddy current effect produces.
Eight, the principle of electromagnetic shielding and shield manufactured materials chooses
Low frequency electromagnetic Bob frequency electromagnetic waves has higher magnetic-field component.For low-down interfering frequency, the permeability of shielding material is even more important during more than high frequency.The basic principle of shielding low frequency (like power frequency) electromagnetic interference is the magnetic path parallel connection by-pass shunt.Through using permeability magnetic material (like mild steel, silicon steel etc.) to provide the magnetic bypass to reduce the inner magnetic flux density of shield.Increase eddy current loss simultaneously as far as possible, make part energy be converted into thermal energy consumption and fall.The thick more then magnetic resistance of shielding material is more little, eddy current loss is big more, and shield effectiveness is good more.Conductance height and the low material (like copper, aluminium etc.) of permeability does not almost have shielding action to electromagnetic magnetic-field component
Magnetic permeability is also relevant with externally-applied magnetic field intensity, and when externally-applied magnetic field intensity was low, magnetic permeability raise with the increase of externally-applied magnetic field; When externally-applied magnetic field intensity surpassed certain value, magnetic permeability sharply descended, and it is saturated to claim that at this moment material has taken place; In a single day material takes place saturated, has just lost magnetic screening action.The magnetic permeability of material is high more, and is saturated more easily.Therefore, in very strong magnetic field, the material that magnetic permeability is very high does not have good screening effectiveness.
The magnetic permeability of mild steel is about 4000, and saturation intensity is about 22000, and low carbon steel plate good mechanical property, solderability be good, be prone to processing, be difficult for saturatedly, is the first-selection of low frequency electromagnetic shielding material, utilizes the satisfied screening effectiveness of acquisition that mild steel can be cheap.
The weak point of prior art
Closed shield); It has characteristics simple in structure, easily manufactured, with low cost; Weak point is 1, present, and common super low frequency electromagnet shielding device is that (be exactly to adopt the individual layer Alperm to form one: 1, shielding factor is low, generally at 20～30dB for single layer structure; 2, the shielding of compatible high-intensity magnetic field and low-intensity magnetic field simultaneously; 3, outside screen is exposed to, receives impact, collision easily and cause the reduction (Alperm receives when impacting, and magnetic permeability can descend) of screening effectiveness; Therefore, the super low frequency electromagnet shielding device of this single layer structure, (the electromagnetic shielding coefficient is at 20～30dB to be only applicable to the lower place of shielding requirements; The electromagnetic shielding coefficient is high more, and the shielding requirements of instrument and equipment is tight more), and (in general the electromagnetic shielding coefficient is irrealizable 75～90dB) for the higher place of shielding requirements.Even shield thickening shield effectiveness is also undesirable.
2, in three (shielding, ground connection, filtering) major measure of tempest, often simple the employing shields the electromagnetic pulse protection that can not provide complete, because the cable in equipment or the system is that the most effectively electromagnetic pulse receives and transmitting antenna.Especially concerning the system that equipment that external antenna is arranged and multiple devices are connected to form by cable, simple shielding can't reach requirement of shelter.A kind of effective measures add filter exactly, cut off the path of nuclear electromagnetic pulse along holding wire or power line propagation, with the perfect nuclear electromagnetic pulse protection of the common formation of shielding.Filtering is in order to prevent that any aerial lug that undesirable electromagnetic viscosimeter edge links to each other with equipment from propagating into equipment, generally accomplished by filter.Adopting filter to suppress NEMP is one of necessary means of nuclear electromagnetic pulse protection.Particularly be coupled to the energy in the circuit to suppressing through lead, it is a kind of extensive adopted method.
3, in the earth lead of existing single or multiple lift electromagnetic screen; Do not install power source surge protector (SPD) additional; After the electromagnetic pulse weapon blast, the highfield of generation and high-intensity magnetic field can induce several kilovolts of electric currents of training to several Wan An to voltage and a few kiloampere of several ten thousand volts on earth lead; This electric current gets in the shield along the slit of earth lead shield
Summary of the invention
The present invention is the electromagnetic screen of a kind of charged source of design Surge Protector holding wire control circuit protector; It adopts the casing sandwich construction of no corner angle; Between the external shielding body, the electric current that power source surge protector (SPD) is installed, stops high-intensity magnetic field to induce gets in the shield along cable in a multilayer screen device portal place; Holding wire, control circuit protector (SPD) are installed; Stop in the disturbing wave entering signal line cable; The power source surge protector (SPD) that is connected with the shield earth lead connects through ground connection or equipotential, bleeds off the strong-electromagnetic field huge current flow that moment induces on the screening arrangement surface.Be used for the automation operational chain of command of military computer composition and the electromagnetic shielding of communication system, this screening arrangement is reasonable in design, easy to manufacture, easy to install and use, and effectiveness is good, has satisfied the shielding requirements to high frequency and ultralow frequency magnetic field.
The electromagnetic screen of sandwich construction provided by the invention is characterized in that screening arrangement is by external shielding body 1 inner shield body 2, power source surge protector (SPD) 7; Holding wire, control circuit protector (SPD) 8, the power source surge protector (SPD) 9,10 that is connected with shield earth lead 17,18 are formed.The shape of shield is the body structure that rectangle does not have the closure of corner angle.The metallic plate that outer shield 1 is a conductive magneto-conductive (shell that can be used as shield uses, high-intensity magnetic field is played shielding action), inboard shield 2 are that the conductive magneto-conductive metallic plate works to continue the electric field magnetic field that shielding shield 1 does not have shielding to live.The shield side has the door 14 of N outside push-and-pull to adopt hinges 12 to be connected with outer shield 1; Be used for the discrepancy of conductively-closed equipment; Door is shut with lock 13 (N=1～6) and is tightly fastened, 14 fens double-layer structures of outer dodge gate, internal layer 15 and skin 16; 15,16 joint portion will with shield 1,2 tight interlocks and overlapping 10～50mm, in case the magnetic field impulse ripple gets into.Outer shield 1 is by the manufacturing of thickness 2～10mm low carbon steel plate with internal layer shield 2, and the quantity of internal layer shield 2 is N, and spacing=10～120mm is made into shield with welding, riveted joint mode with steel plate; Cover body, when jointing positions is welded, do the welding inserts with the shielding material masterbatch; Air inlet N at hole 4 (N), the gas outlet N that the turnover line of the overlapping 10～30mm. of the shielding material of jointing positions outside shield 1 is installed is individual, cable is imported and exported N; Holding wire is imported and exported N, and the shielding at hole 4 is handled in addition, and the hole 5 that the turnover line of inner shield body 2 is installed (N), air inlet N, gas outlet N, cable are imported and exported N; Holding wire is imported and exported N. penetrates for preventing the high-frequency electromagnetic pulse; Hole 4 and hole 5 not point-blank can not driveed in the same side, corresponding point-blank the setting.(length=Nmm) is as the shielding steel pipe 20 at turnover lead hole 4 with steel pipe crooked 30 °～360 ° or that bend to the also flexible one-tenth S shape of spiral-shaped (N 360 ° spiral helicine); Make things convenient for lead turnover, prevent that wavelength from being that the electromagnetic wave of millimeter 4 gets in the shields 1 along the hole; Steel pipe 20 can be welded on shield 1; Put thread with shielding steel pipe 20 also can for shield 1 is tightened on the shield 1; Each hole 4 join (N root) shielding steel pipe 20. along shield 6 each face have N the dielectric skeleton 3 of non-magnetic conduction be used for each shield connection, be fixed between outer shield 1, the internal layer shield 2, making that insulation fully (prevents the electric current that strong electromagnetic pulse produces, is transmitted on the shield 2 through the skeleton 3 that conducts electricity between shield 1 and the shield 2 on shield 1; And on shield 2, induce highfield and magnetic field) with the parallel installation in shield base; Fixing with screw 6 from inside to outside at shield 2, fix screw 6 and 11 installation of staggering with screw 11 at shield 1 ecto-entad; And not point-blank; Screw is made with covering the material masterbatch, and does the welding inserts with the shielding material masterbatch, welds the screw 6 of interior external shielding body and 11 cap nut dead; Prevent that magnetic dispersion from entering. every line of power source surge protector (SPD) 7 (N) three-phase electricity is installed between shield 1 and 2 is connected, parallel connection or be installed in series; Holding wire, control circuit protector (SPD) 8 (N) and the signal line cable that gets in the shield are installed are installed in series, be installed between shield 1 and 2.Power source surge protector (SPD) 7; Holding wire, control circuit protector (SPD) 8 are installed in apart from the doorway 50～200mm of place so that maintenance.With fixed screw 19 power source surge protector (SPD) 7 and 8 is fixed on shield 2 outer surfaces, is welded on fixed screw 19 on the outer surface of shield 2.Also can be power source surge protector (SPD) 7; Holding wire, control circuit protector (SPD) 8 are arranged in hole 5 outer (apart from hole 5,50mm-300mm) and are fixed on the outer surface of shield 2 with fixed screw 19, or power source surge protector (SPD) 7; Holding wire, control circuit protector (SPD) 8 are arranged in the hole 5 interior inner surfaces that are fixed on shield 2 with fixed screw 19 of shield 2.Power source surge protector (SPD) 9 (N) is connected with earth lead 18 (N) with outer shield 1, imports the earth to the electric current that induces at shield 1; Power source surge protector (SPD) 10 (N) is connected with earth lead 17 (N) with outer shield 2; Import the earth to the electric current that induces at shield 2; Earth lead 17,18 can't can be done the equipotential connection during ground connection; Also can be by power source surge protector (SPD) 9,10 through heating; Reaching the purpose of consumed power, be fixed on power source surge protector (SPD) 10 on the shield 2 with fixed screw 19. the connected mode of power source surge protector (SPD) 9,10 and earth lead 17,18 is serial or parallel connections.
Compared with prior art, the present invention has advantage:
1, novel in design, structure is ingenious; 2, making is simple, with low cost; 3, easy to use, effectiveness is good;
4, be fit to army's motorization operational need.
Description of drawings
Fig. 1 is a structural representation of the present invention; Fig. 2 is the front schematic view of sliding door 14; Fig. 3 is the end view of Fig. 2; Fig. 4 internal shield is connected screw and is connected the skeleton sketch map with external shielding body; Fig. 5 is the structure chart of fixed screw 19 and inner shield body 2; Fig. 6 is the hole 4 of external shielding body and the connection layout of shielding conduit 20.
Specific embodiments
Beijing precision instrument protection equipment company embodiment of the present invention scheme; The electromagnetic shielding that is used for a kind of traffic guidance system; The electromagnetic screen of charged source provided by the invention Surge Protector holding wire control circuit protector is characterized in that: screening arrangement is installed power source surge protector (SPD) 7 by outer shield 1, internal layer shield 2, power supply; Holding wire, control circuit protector (SPD) 8; The power source surge protector (SPD) 9,10 that is connected with shield earth lead 17,18 is formed.The shield shape is the body structure of the no corner angle of rectangle (long 5m, wide 4m, high 3m), closure.The shield side has dodge gate 14 (N=1) to adopt hinge 12 (N=3) to be connected with outer shield 1, is used for being protected the inlet/outlet of equipment to shut with locking 13 (N=3) and tightly fastens.14 fens double-layer structure internal layers 15 of outer dodge gate and outer 16,15,16 joint portions will with shield 1,2 tight interlocks and overlapping 10～50mm, in case the entering of magnetic field impulse ripple.Outer shield 1 is by the low carbon steel plate manufacturing (shell that can be used as shield uses, high-intensity magnetic field is played shielding action) of the conductive magneto-conductive of thickness 10mm; Inboard shield 2 is the low carbon steel plate manufacturings by thickness 10mm conductive magneto-conductive; Internal layer shield 2 (N=1 layer); Work to continue the electric field magnetic field that shielding shield 1 does not have shielding to live; Shield 1 is made into shield with welding, riveted joint mode with low carbon steel plate with shield 2 spacings=70-120mm; When jointing positions is welded, do the welding inserts with the shielding material masterbatch, hole 4 (N=4), 1 air inlet (diameter 50mm), 1 gas outlet (diameter 50mm), cable that the turnover line of the overlapping 10～30mm. of the shielding material of jointing positions outside shield 1 is installed are imported and exported 1 (diameter 20mm); Holding wire is imported and exported 1 (diameter 20mm); Place, the hole shielding at hole 4 is handled in addition, and 1 air inlet in hole 5 (N=4) (diameter 50mm) that the turnover line of inner shield body 2 is installed, 1 gas outlet (diameter 50mm), cable are imported and exported 1 (diameter 20mm), and holding wire is imported and exported 1 (diameter 20mm).For preventing that the high-frequency electromagnetic pulse from penetrating, hole 4 and hole 5 not on a side, become corresponding relation not point-blank.Use the shielding steel pipe 20 of the steel pipe of crooked 90 ° of long 300mm as turnover lead hole 4; Convenient all kinds of lead turnover; Prevent that the short millimeter electromagnetic wave of wavelength is along in the 4 entering shields 1 of hole; Shielding steel pipe 20 can be soldered to put thread with shielding steel pipe 20 also can in the shielding 1 shield 1 to be tightened on the shield 1, and a shielding steel pipe 20 is joined at each hole 4.Between shield 1 shield 1 skeleton 3 by non-conductive and not magnetic conduction (prevent the electric current that strong electromagnetic pulse produces on shield 1; Skeleton 3 through conduction is transmitted on the shield 2; And on shield 2, induce highfield and magnetic field) engineering plastics process the wide 60mm of (N=12 root) high 100mm) with the parallel installation in shield base, length identical with shield length (the wide 60mm of high 100mm).Fixing with the screw 6 of long 20～30mm from inside to outside in shield 2 inside; Fixing at the outside ecto-entad of shield 1 with the screw 11 of long 20～30mm, screw 6 and 11 installation of staggering, and not point-blank; Screw 6,11 usefulness shielding material masterbatch are made; Do the welding inserts with covering the material masterbatch, the cap nut weldering of the screw 6 of interior external shielding body and 11 is dead, prevent that magnetic dispersion from entering.Every line of power source surge protector (SPD) 7 (N=1～3) three-phase electricity is installed is connected 1, parallel connection or be installed in series is installed between shield 1 and 2; Holding wire, control circuit protector (SPD) 8 (N=1) signal line cable interior with getting into shield is installed is installed in series, be installed between shield 1 and 2.Power source surge protector (SPD) 7, holding wire, control circuit protector (SPD) 8; Be installed in apart from the doorway 50～200mm of place so that maintenance and replacing; Be fixed on the shield outer surface 2 with fixed screw 19, be welded on fixed screw 19 on the outer surface of shield 2.Power source surge protector (SPD) 9 (N=1) is connected with outer shield 1, and is connected with earth lead 18 (N=1), imports the earth to the electric current that goes out at the shield surface induction; Power source surge protector (SPD) 10 (N=1) is connected with outer shield 2 and is connected with earth lead 17 (N=1); Import the earth to the electric current that goes out at shield 2 surface inductions; Earth lead 17,18 is can't ground connection the time; Can do equipotential and connect the purpose that reaches consumed power by power source surge protector (SPD) 9,10 heatings, be fixed on power source surge protector (SPD) 10 on the outer surface of shield 2 with fixed screw 19. the connected mode of power source surge protector (SPD) 9,10 and earth lead 17,18 is serial or parallel connections.
The characteristics that the present invention has is reasonable in design, easy to manufacture, easy to install and use, effectiveness is good; Measured data reaches ultralow frequency (0～300HZ frequency range); (shielding factor reaches 75～90dB) specification requirement (seeing table one), has satisfied the electromagnetic shielding requirement of high-end products such as ultralow frequency device sensitivity measurement in the height shielding of magnetic interference.
The measured data table one of electromagnetic screen
Claims (10)
1. the electromagnetic screen of charged source Surge Protector holding wire control circuit protector. it is characterized in that: screening arrangement is by outer shield 1, internal layer shield 2, power source surge protector (SPD) 7; Holding wire, control circuit protector (SPD) 8, power source surge protector (SPD) 9,10, earth lead 17,18 are formed.The shield shape is the body structure of the no corner angle of rectangle (long 5m, wide 40m, high 3m), closure; The shield side has dodge gate 14 (N=1-2) to adopt hinge 12 (N=3-9) to be connected with outer shield 1; Dodge gate 14 is shut with lock 13 (N=3-9) and is fastened, and outer dodge gate 14 minutes is outer 16, internal layer 15 (quantity of internal layer 15 be N=1～5 layer); 15,16 joint portion will with shield 1,2 tight interlocks and overlapping 10-50mm.Outer shield 1 is by the manufacturing of thickness 10mm low carbon steel plate with internal layer shield 2; Internal layer shield 2 (N=1-5 layer); Spacing=70-120mm processes shield with welding, riveted joint mode with steel plate; When jointing positions is welded, do the welding inserts with the shielding material masterbatch, the overlapping 10-30mm of the shielding material of jointing positions.Air inlet in hole 4 (N=1-8) (diameter 50mm) that the turnover line of outside shield 1 is installed, 1 gas outlet (diameter 50mm), cable are imported and exported 1 (diameter 20mm); Holding wire is imported and exported 1 (diameter 20mm); The shielding at hole 4 is handled in addition; 1 air inlet in hole 5 (N=1-8) (diameter 50mm) that the turnover line of inner shield body 2 is installed, 1 gas outlet (diameter 50mm), cable are imported and exported 1 (diameter 20mm), and holding wire is imported and exported one (diameter 20mm).Hole 4 and hole 5 become corresponding relation not point-blank.With bend to 30 °～360 ° or bend to spiral-shaped (N 360 ° spiral helicine) or bend to steel pipe (the shielding steel pipe 20 that length=Nmm) also can crooked 90 ° of long 300mm of S shape; Screening arrangement as turnover lead hole 4; Can be soldered in the shielding 1; Put thread also can for shield 1 and screen and shielding steel pipe 20 and tighten, 1 dielectric skeleton 3 between shielding steel pipe 20. ectonexines is joined at each hole 4, and to process (the wide 60mm N=12 of high 100mm) by non-conductive and non-magnetic plastics identical with shield length with the parallel installation length in shield base, uses the screw 6 of long 20-30mm to fix from inside to outside at shield 2; Fixing at shield 1 ecto-entad with the screw 11 of long 20-30mm; Screw 6 and 11 installation of staggering, and not point-blank, not on a side; Screw is made with the shielding material masterbatch; Do the welding inserts with covering the material masterbatch, the cap nut weldering of the screw 6 of interior external shielding body and 11 is dead. power source surge protector (SPD) 7 (N=1～9) each interface of three-phase electricity is installed between shield 1 and 2 is connected 1, with the cable serial or parallel connection that gets in the shield; Signal wires in holding wire, control circuit protector (SPD) 8 (N=1～9) being installed between shield 1 and 2 and the being got into shield .7,8 that connect is installed in apart from the doorway 50-200mm of place so that keep in repair and replacing, with screw 19 power source surge protector (SPD) 7; Holding wire, control circuit protector (SPD) 8 are fixed on the shield 2, are welded on fixed screw 19 on the outer surface of shield 2.Also can be power source surge protector (SPD) 7; Holding wire, control circuit protector (SPD) 8 are arranged in that hole 5 is outer (to be fixed on the outer surface of shield 2 apart from hole 5,50mm～300mm), or power source surge protector (SPD) 7 with fixed screw 19; Holding wire, control circuit protector (SPD) 8 are arranged in the hole 5 interior inner surfaces that are fixed on shield 2 with fixed screw 19 of shield 2.Power source surge protector (SPD) 9 (N=1) is connected with outer shield 1; And be connected with earth lead 18 (N=1); Power source surge protector (SPD) 10 (N=1) is connected with outer shield 2 and is connected with earth lead 17 (N=1); Earth lead 17,18 can't can done the equipotential connection during ground connection, and the connected mode of power source surge protector (SPD) 9,10 and earth lead 17,18 is serial or parallel connections.
2. the electromagnetic screen of charged source according to claim 1 Surge Protector holding wire control circuit protector; It is characterized in that: power source surge protector (SPD) 7, can be 1 or 3; It also can be N; Be arranged in the inside of external shielding body 1, parallelly connected with the cable that gets into or be connected in series.
3. electromagnetic screen according to claim 1 is characterized in that: holding wire, control circuit protector (SPD) 8, can be 1 or 3 also can be N, is arranged in the inside of external shielding body 1, is connected in series with the signal line cable that gets into.
4. according to the electromagnetic screen of claim 1,2 described charged source Surge Protector holding wire control circuit protectors; It is characterized in that: power source surge protector (SPD) 7, can be 1 also can be N; Be arranged in the inside of external shielding body 1, the outside of inner shield body 2; Parallelly connected with the cable that gets into or be connected in series, be fixed on power source surge protector (SPD) 7 on the outer surface of inner shield body 2 with fixed screw 19, fixed screw 19 welds or is screwed on the shield 2 with thread.
5. according to the electromagnetic screen of claim 1,3 described charged source Surge Protector holding wire control circuit protectors; It is characterized in that: holding wire, control circuit protector (SPD) 8 can be 1 or 3; It also can be N; Be arranged in the inside of external shielding body 1, the outside of inner shield body 2; Connect with the signal line cable that gets into, be fixed on holding wire, control circuit protector (SPD) 8 on the outer surface of inner shield body 2 with fixed screw 19, fixed screw 19 welds or is screwed on the shield 2 with thread.
6. the electromagnetic screen of charged source according to claim 1 Surge Protector holding wire control circuit protector; It is characterized in that: the power source surge protector (SPD) 9 that is connecting earth lead 18; Can be 1 also can be N; Be arranged in the outer surface of shield 1, parallelly connected with earth lead 18 or be connected in series.
7. the electromagnetic screen of charged source according to claim 1 Surge Protector holding wire control circuit protector; It is characterized in that: the power source surge protector (SPD) 10 that is connecting earth lead 17; Can be 1 also can be N, is arranged in the inside of external shielding body 1, the outside of inner shield body 2; Parallelly connected with earth lead 17 or be connected in series;, be fixed on the outer surface of inner shield body 2 power source surge protector (SPD) 7 with fixed screw 19, fixed screw 19 welds or is screwed on the shield 2 with thread.
8. the electromagnetic screen of charged source according to claim 1 Surge Protector holding wire control circuit protector; It is characterized in that: have N skeleton 3 to make between external shielding body 1, the inner shield body 2 by non-conductive and non-magnetic nonmetallic materials; Length equates with shield, with the parallel installation in shield base.
9. the electromagnetic screen of charged source according to claim 1 Surge Protector holding wire control circuit protector; It is characterized in that: the hole 4 that is installed into outlet on the external shielding body 1 has N; The hole 5 that is installed into outlet on the inner shield body 2 has N; Hole 4 and hole 5 not in one plane, and become corresponding relation not point-blank.
10. the electromagnetic screen of charged source according to claim 1 Surge Protector holding wire control circuit protector is characterized in that: power source surge protector (SPD) 7; Holding wire, control circuit protector (SPD) 8 are arranged in that hole 5 is outer (to be fixed on the outer surface of shield 2 apart from hole 5,50mm～300mm), or power source surge protector (SPD) 7 with fixed screw 19; Holding wire, control circuit protector (SPD) 8 are arranged in the hole 5 interior inner surfaces that are fixed on shield 2 with fixed screw 19 of shield 2.
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| CN201010109879.5A CN102647894B (en) | 2010-01-27 | 2010-01-27 | Electromagnetic shielding device for signal line control circuit protector with power surge protector |
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| CN201010109879.5A CN102647894B (en) | 2010-01-27 | 2010-01-27 | Electromagnetic shielding device for signal line control circuit protector with power surge protector |
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Cited By (6)
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| CN104659974A (en) * | 2013-11-17 | 2015-05-27 | 韩磊 | Electromagnetic field shielding system for driving motor of electric vehicle |
| CN105099085A (en) * | 2014-05-23 | 2015-11-25 | 韩磊 | Electromagnetic field shield system of motor controller of electric automobile |
| CN105811667A (en) * | 2015-06-12 | 2016-07-27 | 韩磊 | Electromagnetic field shielding system for electric automobile driving motor |
| CN106208529A (en) * | 2015-04-30 | 2016-12-07 | 韩磊 | The electromagnetic-field-shielded system of electric vehicle motor controller |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63234569A (en) * | 1987-03-24 | 1988-09-29 | Asahi Chem Ind Co Ltd | Magnetic shielding material |
| JP2003188610A (en) * | 2001-12-18 | 2003-07-04 | Mitsubishi Electric Corp | High frequency circuit |
| CN2932933Y (en) * | 2006-07-03 | 2007-08-08 | 四川协合科技有限公司 | Surge prevention device |
| CN201113423Y (en) * | 2007-10-22 | 2008-09-10 | 曾子成 | Three phase energy supply protector for surge |
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- 2010-01-27 CN CN201010109879.5A patent/CN102647894B/en not_active Expired - Fee Related
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104659974A (en) * | 2013-11-17 | 2015-05-27 | 韩磊 | Electromagnetic field shielding system for driving motor of electric vehicle |
| CN105099085A (en) * | 2014-05-23 | 2015-11-25 | 韩磊 | Electromagnetic field shield system of motor controller of electric automobile |
| CN105099085B (en) * | 2014-05-23 | 2018-12-04 | 韩磊 | The electromagnetic-field-shielded system of electric vehicle motor controller |
| CN106208529A (en) * | 2015-04-30 | 2016-12-07 | 韩磊 | The electromagnetic-field-shielded system of electric vehicle motor controller |
| CN106208529B (en) * | 2015-04-30 | 2018-11-06 | 韩磊 | The electromagnetic-field-shielded system of electric vehicle motor controller |
| CN105811667A (en) * | 2015-06-12 | 2016-07-27 | 韩磊 | Electromagnetic field shielding system for electric automobile driving motor |
| WO2016197785A1 (en) * | 2015-06-12 | 2016-12-15 | 韩磊 | Electromagnetic field shielding system of electric vehicle drive motor |
| CN105811667B (en) * | 2015-06-12 | 2018-05-22 | 韩磊 | The electromagnetic-field-shielded system of electric vehicle drive motor |
| CN107205334A (en) * | 2016-03-17 | 2017-09-26 | 韩磊 | Electromagnetic pulse attack defense system of container type data center |
| WO2017190569A1 (en) * | 2016-05-04 | 2017-11-09 | 韩磊 | System for shielding external electromagnetic pulse attack of electric motor controller of electric vehicle |
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