CN207269288U - A kind of electromagnetic impact guard system - Google Patents
A kind of electromagnetic impact guard system Download PDFInfo
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- CN207269288U CN207269288U CN201721318943.4U CN201721318943U CN207269288U CN 207269288 U CN207269288 U CN 207269288U CN 201721318943 U CN201721318943 U CN 201721318943U CN 207269288 U CN207269288 U CN 207269288U
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Abstract
A kind of electromagnetic impact guard system, including：First bleeder over the ground, releases over the ground for carrying out first to the electromagnetic wave traveling wave of invasion；The slow device of electromagnetic wave traveling wave, for reflect the simultaneously smooth electromagnetic wave traveling wave by the first electromagnetic wave traveling wave released over the ground；Second bleeder over the ground, releases over the ground for carrying out second to the electromagnetic wave traveling wave after reflecting and is smooth；EMC filters, for carrying out EMC filtering by the second electromagnetic wave traveling wave released over the ground.Implement the electromagnetic impact guard system of the utility model, increase traveling wave impedance to make traveling wave reflect by increasing the device of traveling wave wave resistance, solve response problems at different levels, improve discharge voltage over the ground and thereby reduce requirement to grounding resistance.
Description
Technical field
Anti- electromagnetic interference field is the utility model is related to, more specifically to a kind of electromagnetic impact guard system.
Background technology
The electromagnetic protection of the prior art generally includes lightning protection and Electro Magnetic Compatibility (Electro Magnetic
Compatibility, EMC) protection.Lightning protection is typically with high pressures such as direct lightning strike, inductive lightning, surge, switching overvoltages, greatly
Electric current, the electromagnet phenomenon of big energy are main protection object.And Electro Magnetic Compatibility protection is typically with the height of low energy, wide spectrum
Frequency interference signal is main protection object.The electromagnetic impact means of defence of the prior art typically first carry out at least three times more than
Multistage is released over the ground, and EMC filtering is then carried out in equipment.But there are problems with for this electromagnetic impact means of defence.
Firstly, there are the response time problems at different levels released.Rear class module of releasing is sensitiveer in general, response speed
It hurry up, but ability to bear is poor.When thunder and lightning electromagnetic running wave passes through wire spread, the possible mould that will release prior to prime of post-module
Block is turned on and damaged rapidly.Ultimately result in whole system shielding failure.
Secondly as the requirement for energy of releasing over the ground, the requirement to grounded screen is very high, generally requires the ground connection electricity of grounded screen
Resistance is less than 10 Ω, and the manufacture cost and maintenance cost of such ground resistance are all very high.
Utility model content
The technical problems to be solved in the utility model is, for the drawbacks described above of the prior art, there is provided one kind can solve
The problem of coordinating is responded between certainly at different levels, and the electromagnetic impact guard system of the requirement to grounding resistance can be reduced.
Technical solution is used by the utility model solves its technical problem：A kind of electromagnetic impact guard system is constructed,
Including：
First bleeder over the ground, releases over the ground for carrying out first to the electromagnetic wave traveling wave of invasion；
The slow device of electromagnetic wave traveling wave, for simultaneously smooth described to by the first electromagnetic wave traveling wave released over the ground reflect
Electromagnetic wave traveling wave；
Second bleeder over the ground, lets out over the ground for carrying out second to the electromagnetic wave traveling wave after reflecting and is smooth
Put；
EMC filters, for carrying out EMC filtering by the second electromagnetic wave traveling wave released over the ground.
In electromagnetic impact guard system described in the utility model, the slow device of electromagnetic wave traveling wave includes hollow conductive
The magnet managed, be arranged on inside the hollow conductive pipe, is arranged between the hollow conductive pipe and the magnet to insulate
Magnet and the first insulating sleeve of the hollow conductive pipe are stated, the magnetic sleeve pipe set around the hollow conductive pipe, Yi Jishe
Put between the magnetic sleeve pipe and the hollow conductive pipe to insulate the second of the hollow conductive pipe and the magnetic sleeve pipe
Insulating sleeve.
In electromagnetic impact guard system described in the utility model, the hollow conductive pipe is to open up continuous spiral shell on outer wall
The cylindrical metal tube of spin slot；The magnet is the central bar magnet for being threaded through the cylindrical metal tube.
In electromagnetic impact guard system described in the utility model, the end walls center of the cylindrical metal tube is set
The first through hole passed through for the bar magnet；It is placed equidistant with the end walls of the cylindrical metal tube around the first through hole more
A second through hole.
In electromagnetic impact guard system described in the utility model, the slow device of electromagnetic wave traveling wave further comprises setting
Put the fixedly connected part at the hollow conductive pipe both ends.
In electromagnetic impact guard system described in the utility model, the fixedly connected part includes being set in described hollow
Contact tube both ends are with annular insulation Jie's piece of the insulate hollow conductive pipe and the magnetic sleeve pipe, and are fixed on the magnetism
Conductive fixed cover on casing；Multiple third through-holes are set on the outer wall of the conduction fixed cover.
In electromagnetic impact guard system described in the utility model, the described first bleeder and second pair described over the ground
Ground bleeder connection the earth.
In electromagnetic impact guard system described in the utility model, the EMC filters include：
First bypass filtering unit, for being filtered to carrying out the first bypass by the second electromagnetic wave traveling wave released over the ground
Ripple；
Common mode filtering component, for carrying out common mode filtering to the electromagnetic wave traveling wave by the first bypass filtering；
Second bypass filtering unit, carries out the second bypass to the electromagnetic wave traveling wave by common mode filtering and filters；
Differential mode filtering unit, for carrying out differential mode filtering to the electromagnetic wave traveling wave by the second bypass filtering.
In electromagnetic impact guard system described in the utility model, by the first bypass filtering unit and described second
Road filtering unit connection place of working.
In electromagnetic impact guard system described in the utility model, the common mode filtering component includes at least two common modes
Coil and the high-frequency magnetic being arranged between the co-mode coil, the differential mode filtering unit include high frequency magnetic core and are set in institute
State the coil on high frequency magnetic core.
Implement the electromagnetic impact guard system of the utility model, increase traveling wave impedance by increasing the device of traveling wave wave resistance
And then make traveling wave reflect, solve response problems at different levels, improve discharge voltage over the ground and thereby reduce to grounding resistance
It is required that.Further, by setting the slow device of electromagnetic wave traveling wave can be to increasing electromagnetic wave traveling wave impedance, smooth waveform steepness
And electromagnetic wave traveling wave of slowing down, releases over the ground so that just carrying out second after completion of releasing on the first ground, and then more adds
Beauteously solve response problems at different levels, its effect can reduce the 3rd and release over the ground step, without influencing protection effect.Again into
One step, by setting place of working and the earth, avoids interfering with each other between two kinds of electromagnetic protections.
Brief description of the drawings
Below in conjunction with accompanying drawings and embodiments, the utility model is described in further detail, in attached drawing：
Fig. 1 is the functional block diagram of the first embodiment of the electromagnetic impact guard system of the utility model；
Fig. 2 is the functional block diagram of the second embodiment of the electromagnetic impact guard system of the utility model.
Fig. 3 is the Structure explosion diagram for the slow device of electromagnetic wave traveling wave that the electromagnetic impact guard system shown in Fig. 2 uses；
Fig. 4 is the front view of the cylindrical metal tube of the slow device of electromagnetic wave traveling wave shown in Fig. 3；
Fig. 5 is the oblique view of the cylindrical metal tube of the slow device of electromagnetic wave traveling wave shown in Fig. 3；
Embodiment
In order to make the purpose of the utility model, technical solutions and advantages more clearly understood, below in conjunction with attached drawing and implementation
Example, is further elaborated the utility model.It should be appreciated that specific embodiment described herein is only explaining
The utility model, is not used to limit the utility model.
Fig. 1 is the functional block diagram of the first embodiment of the electromagnetic impact guard system of the utility model.As shown in Figure 1, this
The electromagnetic impact guard system of utility model, including：The first slow device 200, second of bleeder 100, electromagnetic wave traveling wave over the ground
Bleeder 300 and EMC filters 400 over the ground.
In the utility model, described first over the ground bleeder 100 be used to carry out first to the electromagnetic wave traveling wave of invasion
Release over the ground.In the utility model, described first over the ground bleeder 100 can be arrester, such as can be pressure-sensitive electricity
Resistance, electric discharge ligament arrester, Zinc-Oxide Arrester, ceramic discharge tube, Transient Suppression Diode, semiconductor discharge tube etc. device
Part or its various combination.
The slow device 200 of electromagnetic wave traveling wave is used for being reflected and being put down by the first electromagnetic wave traveling wave released over the ground
The sliding electromagnetic wave traveling wave.In the utility model, the slow device 200 of electromagnetic wave traveling wave can propagate electromagnetic wave by adjusting
The means of the dielectric constant and relative permeability of the conducting wire of traveling wave or the dielectric of cable, to increase traveling wave impedance and drop
The velocity of wave of low row ripple, its principle are as follows：
Spread speed v of the electromagnetic wave traveling wave in conducting wire be：
In above formula：
C is the light velocity, c=3 × 108Meter per second.
εrFor the relative dielectric constant of conducting wire surrounding medium.
μrFor the relative permeability of conducting wire surrounding medium.
By above formula it is recognised that spread speed of the electromagnetic wave traveling wave in conducting wire, material, length, sectional area with conducting wire,
Inductance, distribution capacity etc. are irrelevant, only it is related with the characteristic of the dielectric around conducting wire, more particularly only with insulation
The relative dielectric constant ε of mediumrWith relative permeability μrIt is related.
So, wave impedance Z of the electromagnetic wave traveling wave in conducting wire is：
ε in above formula0--- permittivity of vacuum；
εr--- relative dielectric constant；
μ0--- space permeability；
μr--- relative permeability；
hd--- conducting wire average height over the ground；
R --- wire radius.
And in existing equipment circuit, the parameter such as the radius of conducting wire, height is constant, therefore wave impedance formula can letter
Chemical conversion：
Therefore deduce that：In the case where conducting wire has determined, influence the characteristic of wave impedance during traveling wave also only and
The relative dielectric constant ε of dielectricrWith relative permeability μrIt is related.Therefore, leading for electromagnetic wave traveling wave can be propagated by adjusting
The dielectric constant of the dielectric of line or cable and the means of relative permeability, to increase traveling wave impedance and reduce traveling wave
Velocity of wave.
In the utility model, continue to propagate along conducting wire by the first electromagnetic wave traveling wave released over the ground, at this moment when it
When being sent to the slow device 200 of the electromagnetic wave traveling wave, since the wave impedance of electromagnetic wave traveling wave increases suddenly, electromagnetic wave traveling wave meeting
Traveling wave reflection effect occurs here, makes the electromagnetic wave traveling wave of incidence prolong former propagation path backtracking, such electromagnetic wave traveling wave
The described first bleeder 100 over the ground will be returned to, at this moment the electromagnetic wave traveling wave by reflection and incident electromagnetic wave traveling wave
Superposition will be produced, will so improve its voltage-to-ground in the described first bleeder 100 over the ground so that described first lets out over the ground
Put device 100 and be more prone to conducting to be released over the ground.Also, since the wave impedance of electromagnetic wave traveling wave increases it to electromagnetic wave
The waveform steepness of traveling wave produces gentle effect, that is, reduces the waveform steepness of electromagnetic wave traveling wave, this releases and filter to rear class again
Ripple has very big benefit.In the preferred embodiment of the utility model, while the spread speed of electromagnetic wave traveling wave can be reduced,
It is had time enough after waiting a bleeder fully on, can just travel at secondary bleeder, so may be used
Ideally to solve the problems, such as at different levels response orders.Its effect can cancel third level bleeder completely, anti-without influencing
Shield effect.Fig. 3-5 shows the slow device 200 of preferable electromagnetic wave traveling wave.Certainly, in other preferred embodiments of the utility model
In, other slow devices 200 of electromagnetic wave traveling wave constructed can also be used.
Described second over the ground bleeder 300 be used to carry out second to the electromagnetic wave traveling wave after reflecting and is smooth
Release over the ground.The EMC filters 400 are used for carrying out EMC filtering by the second electromagnetic wave traveling wave released over the ground.At this
In utility model, described second over the ground bleeder 300 can be arrester, such as can be varistor, electric discharge ligament
Arrester, Zinc-Oxide Arrester, ceramic discharge tube, Transient Suppression Diode, semiconductor discharge tube etc. device or its various groups
Close.
The ECM filters 400 can be with any filter circuit as known in the art or equipment.The electromagnetic wave traveling wave
The slow device of electromagnetic wave traveling wave that slow device 200 is referred to shown in Fig. 3-5 is set.In the utility model, ability can be used
Any of ECM filters carry out EMC filtering in domain.In the preferred embodiment of the utility model, filtered by EMC
Afterwards, electromagnetic interference can be reduced to the amplitude that later stage module can be born.Later stage module can be further supplied at this time.
Implement the electromagnetic impact guard system of the utility model, increase traveling wave impedance by increasing the device of traveling wave wave resistance
And then make traveling wave reflect, solve response problems at different levels, improve discharge voltage over the ground and thereby reduce to grounding resistance
It is required that.
Fig. 2 is the functional block diagram of the second embodiment of the electromagnetic impact guard system of the utility model.As shown in Fig. 2, this
The electromagnetic impact guard system of utility model, including：The first slow device 200, second of bleeder 100, electromagnetic wave traveling wave over the ground
Bleeder 300 and EMC filters 400 over the ground.Wherein, first over the ground the slow device 200 of bleeder 100, electromagnetic wave traveling wave,
Second over the ground bleeder 300 connection the earth.The EMC filters 400 connect place of working.In the present embodiment, the EMC
Filter 400 includes the first bypass filtering unit 410, common mode filtering component 420, second bypasses filtering unit 430 and poor
Mould filtering unit 440.
In the utility model, described first over the ground bleeder 100 be used to carry out first to the electromagnetic wave traveling wave of invasion
Release over the ground.In the utility model, described first over the ground bleeder 100 can be arrester, such as can be pressure-sensitive electricity
Resistance, electric discharge ligament arrester, Zinc-Oxide Arrester, ceramic discharge tube, Transient Suppression Diode, semiconductor discharge tube etc. device
Part or its various combination.
The slow device 200 of electromagnetic wave traveling wave is used for being reflected and being put down by the first electromagnetic wave traveling wave released over the ground
The sliding electromagnetic wave traveling wave.Fig. 3-5 shows the preferable slow device of electromagnetic wave traveling wave of the utility model.As in Figure 3-5, it is excellent
The slow device of electromagnetic wave traveling wave of choosing, including：Hollow conductive pipe 1, the magnet 4 being arranged on inside the hollow conductive pipe 1, are arranged on
With the first insulation sleeve of the insulate magnet 4 and the hollow conductive pipe 1 between in the hollow conductive pipe 1 and the magnet 4
Pipe 5, the magnetic sleeve pipe 3 set around the hollow conductive pipe 1, and it is arranged on the magnetic sleeve pipe 3 and the hollow conductive
With the second insulating sleeve 2 of the insulate hollow conductive pipe 1 and the magnetic sleeve pipe 3 between pipe 1.
As in Figure 3-5, the hollow conductive pipe 1 can be formed by one section of hollow cylindrical metal tube milling, outside it
Continuous helical groove 13 is equidistantly opened up on wall, so as to form helix conductor structure.Forming this architectural feature can be more favourable
In the intrinsic inductance amount of increase hollow conductive pipe 1, so as to improve the impedance to electromagnetic running wave.And hollow by this structure is led
Fulgurite 1 is used as electric conductor, its sectional area is easy to do the application scenario for greatly, being highly suitable for high current.Certainly it is new in this practicality
In other preferred embodiments of type, which can not also be placed equidistant with., can be with addition, those skilled in the art know
The hollow conductive pipe 1 is constructed using other any conductive materials.In addition, in other preferred embodiments of the utility model
In, the outer wall of the hollow conductive pipe 1 can be smooth, and equidistant or Unequal distance can also be set to set helical form convex on it
Rise to form hollow worm gear.
As shown in figure 3, the magnet 4 is preferably the bar magnet being threaded through in the hollow conductive pipe 1.The hollow conductive pipe
1 center of end walls 11 sets center through hole 14 so that the bar magnet passes through.Also enclosed in the end walls 11 of the hollow conductive pipe 1
Multiple periphery through holes 12 are placed equidistant with around center through hole 14.Certainly, in the simplification embodiment of the utility model, it is convenient to omit this
A little peripheries through hole 12, and magnet 4 can be arranged in any other manner inside the hollow conductive pipe 1, and it can be
Any shape.In the utility model, it is preferred to use strong bar magnet is as magnet 4.
As shown in figure 3, first insulating sleeve 5 can be set on the magnet 4 with the magnet 4 and described of insulating
Hollow conductive pipe 1.In other preferred embodiments of the utility model, other modes can be used, for example are wrapped up, are surround, it is close
Other any modes such as envelope keep apart magnet 4 and hollow conductive pipe 1.It is preferred that using the insulating materials of high-k, example
Such as common plastics of the dielectric constant 2~4 or so, dielectric constant makes first insulation sleeve in 6~8 or so ceramic material
Pipe 5.It is, of course, also possible to using the material with other dielectric constants, those skilled in the art can carry out according to actual conditions
Selection.
Further as shown in figure 3, the second insulation tube 2 can be equally set in the hollow conductive pipe 1 with described in insulation
Hollow conductive pipe 1 and the magnetic sleeve pipe 3.In other preferred embodiments of the utility model, other modes can be used, than
Such as parcel, it surround, other any modes such as sealing are by the hollow conductive pipe 1 and the magnetic sleeve pipe 3.It is preferred that use high dielectric
The insulating materials of constant, such as dielectric constant is in 2~4 or so common plastics, ceramic material of the dielectric constant 6~8 or so
To make second insulating sleeve 2.It is, of course, also possible to using the material with other dielectric constants, those skilled in the art can
To be made choice according to actual conditions.
Further as shown in figure 3, magnetic sleeve pipe 3 is preferably to be located at the cylindrical sleeve outside the second insulation tube 2.When
So, in other preferred embodiments of the utility model, the magnetic sleeve pipe 3 can also use other any shapes.It is preferred that adopt
The magnetic sleeve pipe 3, art technology are made with the material of high magnetic permeability, such as amorphous, nanocrystalline, ferrite, iron powder core material
Personnel can specifically make choice according to actual conditions.
Further as shown in figure 3, in the present embodiment, further including and being arranged on 1 both ends of hollow conductive pipe so as to fixed
Whole equipment and the fixedly connected part 6 for being connected it with external interface.Certainly, can in the simplification embodiment of the utility model
To omit the fixedly connected part 6.As shown in Figure 1, the fixedly connected part includes annular insulation Jie piece 62 and conductive fixed cover 61.Should
Annular insulation Jie piece 62 is used to insulate the hollow conductive pipe 1 with the magnetic sleeve pipe 3 to prevent both to be electrically connected.The annular is exhausted
Edge Jie piece 62 can be made of any insulating materials.Certainly, in the other embodiment of the utility model, other can also be used
Insulation Jie's piece of shape, if it is shaped to be adapted to the hollow conductive pipe 1 and the magnetic sleeve pipe 3, therefore can be exhausted
Hollow conductive pipe 1 described in edge is with the magnetic sleeve pipe 3 to prevent both to be electrically connected.The conduction fixed cover 61 is fixed on institute
Magnetic sleeve pipe 3 is stated to fasten whole equipment, and be electrically connected with external interface easy to hollow conductive pipe 1.Conductive fixed cover 61 is preferred
The metal connecting sheet that multiple through holes are set can be used.The multiple through hole can be adapted to each through hole in hollow conductive pipe 1.
The utility model is improved at the same time by the composite construction of magnet+insulating sleeve+conductor+insulating sleeve+magnetic sleeve pipe
The dielectric constant and relative permeability of the conductor surrounding medium of electromagnetic wave traveling wave, can reduce electromagnetic wave traveling wave speed and waveform is steep
Degree.
Below in conjunction with the slow device of electromagnetic wave traveling wave shown in Fig. 3, its principle is described as follows：
Spread speed v of the electromagnetic wave traveling wave in conducting wire be：
In above formula：
C is the light velocity, c=3 × 108Meter per second.
εrFor the relative dielectric constant of conducting wire surrounding medium.
μrFor the relative permeability of conducting wire surrounding medium.
By above formula it is recognised that spread speed of the electromagnetic wave traveling wave in conducting wire, material, length, sectional area with conducting wire,
Inductance, distribution capacity etc. are irrelevant, only it is related with the characteristic of the dielectric around conducting wire, more particularly only with insulation
The relative dielectric constant ε of mediumrWith relative permeability μrIt is related.
If traveling wave is propagated on overhead conducting wire, dielectric is air around conducting wire, the opposite dielectric of air
Constant εr≈ 1, relative permeability μr≈ 1, therefore v ≈ c, i.e. the spread speed of traveling wave is basically the light velocity.If it is intended to reduce
Spread speed of the traveling wave in certain section of conductor, can also may be used reaching by way of replacing the dielectric of high-k ε r
Reached by improving around conductor in a manner of relativepermeabilityμr.
If we except want reduce traveling wave spread speed, also want to reduce traveling-wave waveform steepness.At this moment will try
Increase the impedance in transmission path.
So, wave impedance Z of the electromagnetic wave traveling wave in conducting wire is：
ε in above formula0--- permittivity of vacuum；
εr--- relative dielectric constant；
μ0--- space permeability；
μr--- relative permeability；
hd--- conducting wire average height over the ground；
R --- wire radius.
From above formula, wave impedance Z is not only related with the relative dielectric constant ε r of dielectric and relativepermeabilityμr, also
Related with the distribution character of conductor, the radius r (circular cross-section conductor) of conductor, the sectional area even position of conductor over the ground can also produce
It is raw to influence.
It is excessive that this appears to variable, but from the point of view of engineering viewpoint, since traveling wave can be used as propagation by conductor
Path, then the presence of inevitable the having determined property of conducting wire, then its parameter whether sectional area, radius and the distance on ground
Etc. be all to determine, too big change will not be produced, this is determined by the natural quality of object.
So, can be wire radius r, conducting wire average height h over the ground in our practical engineering applicationsdOne is regarded as etc. parameter
A constant is handled.At this moment ε0、μ0、hd, r be all constant, we can be replaced with a constant coefficient K.
Order
So wave impedance formula can be simplified to：
Therefore deduce that：In the case where conductor has determined, influence the characteristic of wave impedance during traveling wave also only and
The relative dielectric constant ε of dielectricrWith relative permeability μrIt is related.
Analyzed more than, a kind of slow device of electromagnetic wave traveling wave can be constructed, wherein providing electromagnetism by one section of conductor
Ripple traveling wave path, medium around conductor can carry out traveling wave ripple by adjusting relative dielectric constant ε r and relativepermeabilityμr
The adjustment of speed and wave impedance.
ByUnderstand, as long as selection εr=4 dielectric, even if working as μrWhen=1, v=0.5c also can obtain
The speed of electromagnetic running wave can be namely reduced to the half of the light velocity.And by increasing μrNumerical value can play the work of bigger
With especially present new material such as amorphous etc. can be μrAccomplish more than 80000~100000.But actually it is difficult to find both
Insulation performance well again have high magnetic permeability insulating materials because the material for having magnetic conductivity be typically all metal or comprising metal into
Point.
ByUnderstand, and by increasing μrNumerical value can greatly improve wave resistance antiatherosclerotic effect, although we are
Reduction velocity of wave and improve ε at the same timerNumerical value, but εrUsual very little, the dielectric constant of general solid is all units, and
Magnetic permeability μrCan be very big, it is possible thereby to ignore εrThe influence of increase.
The composite junction that the above-mentioned slow device of electromagnetic wave traveling wave passes through magnet+insulating sleeve+conductor+insulating sleeve+magnetic sleeve pipe
Structure, while the dielectric constant and relative permeability of the conductor surrounding medium of electromagnetic wave traveling wave are improved, the ripple of electromagnetic running wave can be made
Speed is reduced to the part of the light velocity to 1/tens in the slow equipment of electromagnetic wave traveling wave of the utility model, and significantly
The gentle waveform steepness of electromagnetic running wave.
As it was previously stated, continue to propagate along conducting wire by the first electromagnetic wave traveling wave released over the ground, at this moment when it is transmitted
During device 200 slow to the electromagnetic wave traveling wave, since the wave impedance of electromagnetic wave traveling wave increases suddenly, electromagnetic wave traveling wave can be here
Generation traveling wave reflection effect, makes the electromagnetic wave traveling wave of incidence prolong former propagation path backtracking, such electromagnetic wave traveling wave will be returned
The described first bleeder 100 over the ground are returned to, at this moment the electromagnetic wave traveling wave by reflection and incident electromagnetic wave traveling wave will produce
Superposition, will so improve its voltage-to-ground in the described first bleeder 100 over the ground so that the described first bleeder over the ground
100 are more prone to conducting to be released over the ground.Also, since the wave impedance of electromagnetic wave traveling wave increases it to electromagnetic wave traveling wave
Waveform steepness produces gentle effect, that is, reduces the waveform steepness of electromagnetic wave traveling wave, this to rear class release again and filtering is that have
Very big benefit.The slow device 200 of electromagnetic wave traveling wave can reduce the spread speed of electromagnetic wave traveling wave at the same time, when it is had enough
Between after waiting a bleeder fully on, can just travel at secondary bleeder, so can ideally solve each
Between level the problem of response order.Its effect can cancel third level bleeder completely, without influencing protection effect.
Described second over the ground bleeder 300 be used to carry out second to the electromagnetic wave traveling wave after reflecting and is smooth
Release over the ground.The EMC filters 400 are used for carrying out EMC filtering by the second electromagnetic wave traveling wave released over the ground.At this
In utility model, described second over the ground bleeder 300 can be arrester, such as can be varistor, electric discharge ligament
Arrester, Zinc-Oxide Arrester, ceramic discharge tube, Transient Suppression Diode, semiconductor discharge tube etc. device or its various groups
Close.
The first bypass filtering unit 410 is used for carrying out first by the second electromagnetic wave traveling wave released over the ground
Bypass filtering.For example, in the preferred embodiment of the utility model, one or more filter capacitors in parallel can be used opposite
Place of working carries out bypass filtering.In other preferred embodiments of the utility model, other bypass filter circuits can also be used
Or device carries out bypass filtering.
The common mode filtering component 420 is used to carry out common mode filter to the electromagnetic wave traveling wave by the first bypass filtering
Ripple.For example, in the preferred embodiment of the utility model, common mode inductance can be used to carry out common mode filtering.In the utility model
A preferred embodiment in, the common mode inductance can include at least two co-mode coils and be arranged on the co-mode coil it
Between high-frequency magnetic.
Second bypass filtering unit 430 is used to filter the second bypass of electromagnetic wave traveling wave progress by common mode filtering
Ripple.For example, in preferred embodiment in the utility model, it can use one or more filter capacitors in parallel are opposite to work
Ground carries out bypass filtering.In other preferred embodiments of the utility model, can also use other bypass filter circuits or
Device carries out bypass filtering.So in the utility model, counterpoises are separated into 2 parts according to function, sole duty is released
The earth earth mat of current energy and the full-time work earth mat for filtering out interference, make two ground not interfere with each other.
The differential mode filtering unit 440 is used to carry out differential mode filter to the electromagnetic wave traveling wave by the second bypass filtering
Ripple.For example, in the preferred embodiment of the utility model, differential mode inductance can be used to carry out differential mode filtering.In the utility model
A preferred embodiment in, the differential mode inductance can include high frequency magnetic core and the coil that is set on the high frequency magnetic core.
Implement the electromagnetic impact guard system of the utility model, increase traveling wave impedance by increasing the device of traveling wave wave resistance
And then make traveling wave reflect, solve response problems at different levels, improve discharge voltage over the ground and thereby reduce to grounding resistance
It is required that.Further, by setting the slow device of electromagnetic wave traveling wave can be to increasing electromagnetic wave traveling wave impedance, smooth waveform steepness
And electromagnetic wave traveling wave of slowing down, releases over the ground so that just carrying out second after completion of releasing on the first ground, and then more adds
Beauteously solve response problems at different levels, its effect can reduce the 3rd and release over the ground step, without influencing protection effect.Again into
One step, by setting place of working and the earth, avoids interfering with each other between two kinds of electromagnetic protections.Further, due to
Close earth mat to distinguish and traveling wave reflection and delay so that the requirement to grounded screen more reduces, can be in bigger ground resistance
Grounded screen on realize good protection effect.There are two branches (1) to pass through ground connection the reason is that invasion electromagnetic wave traveling wave is advanced
Resistance enters the earth.(2) equipment is entered by conducting wire.(2) article enter the branch of equipment and add very big resistance at this time
Anti-, so according to shunting principle, the current ratio on (1) article branch will necessarily increase, it might even be possible to properly increase and connect
Most current energy can still be got in the case of the value of ground resistance.
The above is only the preferred embodiment of the utility model only, is not intended to limit the utility model, all at this
All any modification, equivalent and improvement made within the spirit and principle of utility model etc., should be included in the utility model
Protection domain within.
Claims (10)
- A kind of 1. electromagnetic impact guard system, it is characterised in that including：First bleeder over the ground, releases over the ground for carrying out first to the electromagnetic wave traveling wave of invasion；The slow device of electromagnetic wave traveling wave, for reflect the simultaneously smooth electromagnetism by the first electromagnetic wave traveling wave released over the ground Ripple traveling wave；Second bleeder over the ground, releases over the ground for carrying out second to the electromagnetic wave traveling wave after reflecting and is smooth；EMC filters, for carrying out EMC filtering by the second electromagnetic wave traveling wave released over the ground.
- 2. electromagnetic impact guard system according to claim 1, it is characterised in that the slow device of electromagnetic wave traveling wave includes Hollow conductive pipe, the magnet being arranged on inside the hollow conductive pipe, are arranged between the hollow conductive pipe and the magnet With the first insulating sleeve of the insulate magnet and the hollow conductive pipe, the magnetic sheath set around the hollow conductive pipe Pipe, and be arranged between the magnetic sleeve pipe and the hollow conductive pipe with the hollow conductive pipe and the magnetic sheath of insulating Second insulating sleeve of pipe.
- 3. electromagnetic impact guard system according to claim 2, it is characterised in that the hollow conductive pipe is to be opened on outer wall If the cylindrical metal tube of continuous helical groove；The magnet is the central bar magnet for being threaded through the cylindrical metal tube.
- 4. electromagnetic impact guard system according to claim 3, it is characterised in that the end walls of the cylindrical metal tube Center sets the first through hole passed through for the bar magnet；Around described first through hole etc. in the end walls of the cylindrical metal tube Away from multiple second through holes of setting.
- 5. electromagnetic impact guard system according to claim 1, it is characterised in that the slow device of electromagnetic wave traveling wave is into one Step includes the fixedly connected part for being arranged on the hollow conductive pipe both ends.
- 6. electromagnetic impact guard system according to claim 5, it is characterised in that the fixedly connected part includes being set in The hollow conductive pipe both ends are with annular insulation Jie's piece of the insulate hollow conductive pipe and the magnetic sleeve pipe, and are fixed on Conductive fixed cover in the magnetic sleeve pipe；Multiple third through-holes are set on the outer wall of the conduction fixed cover.
- 7. electromagnetic impact guard system according to claim 1, it is characterised in that the described first bleeder and institute over the ground State second over the ground bleeder connection the earth.
- 8. the electromagnetic impact guard system according to any claim in claim 1-7, it is characterised in that the EMC Filter includes：First bypass filtering unit, for being filtered to carrying out the first bypass by the second electromagnetic wave traveling wave released over the ground；Common mode filtering component, for carrying out common mode filtering to the electromagnetic wave traveling wave by the first bypass filtering；Second bypass filtering unit, carries out the second bypass to the electromagnetic wave traveling wave by common mode filtering and filters；Differential mode filtering unit, for carrying out differential mode filtering to the electromagnetic wave traveling wave by the second bypass filtering.
- 9. electromagnetic impact guard system according to claim 8, it is characterised in that the first bypass filtering unit and institute State the second bypass filtering unit connection place of working.
- 10. electromagnetic impact guard system according to claim 8, it is characterised in that the common mode filtering component is included extremely Few two co-mode coils and the high-frequency magnetic being arranged between the co-mode coil, the differential mode filtering unit include high frequency magnetic core With the coil being set on the high frequency magnetic core.
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| CN201721318943.4U CN207269288U (en) | 2017-10-12 | 2017-10-12 | A kind of electromagnetic impact guard system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107592784A (en) * | 2017-10-12 | 2018-01-16 | 深圳市创仕达电子有限公司 | A kind of electromagnetic impact means of defence and system |
| CN116723688A (en) * | 2023-08-07 | 2023-09-08 | 陕西汇天广科信息科技有限公司 | Multifunctional integrated circuit sensor |
-
2017
- 2017-10-12 CN CN201721318943.4U patent/CN207269288U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107592784A (en) * | 2017-10-12 | 2018-01-16 | 深圳市创仕达电子有限公司 | A kind of electromagnetic impact means of defence and system |
| CN116723688A (en) * | 2023-08-07 | 2023-09-08 | 陕西汇天广科信息科技有限公司 | Multifunctional integrated circuit sensor |
| CN116723688B (en) * | 2023-08-07 | 2024-03-08 | 中航星(西安)智能系统有限公司 | Multifunctional integrated circuit sensor |
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