CN207518473U - A kind of electromagnetic compatibility wave filter - Google Patents
A kind of electromagnetic compatibility wave filter Download PDFInfo
- Publication number
- CN207518473U CN207518473U CN201721664491.5U CN201721664491U CN207518473U CN 207518473 U CN207518473 U CN 207518473U CN 201721664491 U CN201721664491 U CN 201721664491U CN 207518473 U CN207518473 U CN 207518473U
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- Prior art keywords
- filter
- fuse
- circuit
- wave filter
- parallel circuit
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- Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)
Abstract
The utility model discloses a kind of wave filters, are related to a kind of electromagnetic compatibility wave filter mainly for high-voltage large current under high frequency environment, and technical points mainly include：Metal shell, the resistance of metallic shield net and composition filter circuit, filter capacitor and fuse, the resistance form parallel circuit with the filter capacitor, and the parallel circuit connects fuse, the fuse ground connection；The input terminal and/or output terminal of the wave filter are also connected with fuse inside the metal shell；The metallic shield net is seamlessly connected, and be isolated between the exit using high insulating materials on the input terminal of the wave filter and/or the exit of output terminal with the metal shell outer surface.The utility model is by the way that protectiveness that the technical solution of offer solves wave filter institute access system well is weak, signal transmitting and receiving is of poor quality and the problems such as wave filter itself anti-interference is insufficient, and security reliability is low.
Description
Technical field
The utility model is related to a kind of wave filter, particularly a kind of electromagnetism available for high-voltage large current under high frequency environment
Compatibility filter.
Background technology
Wave filter, to the filtering device of the interference such as signal, power cord, is mainly made as most common inhibition high-frequency harmonic
With being that attenuation is played to high-frequency interferencing signal, just itself, shadow will not be caused to the waveform of control signal, power supply signal
It rings, thus is widely used in electrical equipment, electronic circuit.With the development of science and technology, single power supply, level signal
The operating of equipment is can not meet, an equipment often has several, ten several or even tens kinds of signals, in addition the work of circuit
Interfering frequency in working frequency and ambient enviroment is higher and higher, and the requirement for wave filter is also more stringent.
In the prior art, usually there are problems that the following：1st, the frequency of use of wave filter in a device is high, but due to
It is connected directly with circuit board, often a faulty filter is even burnt, and the related circuit board connected to it of meeting also occurs
Failure significantly increases production cost.2nd, wave filter is not during working, and there are residual amount of energy, energy between circuit and the earth
Measure it is excessive will cause harmful effect to electric elements and equipment even human body, cause accident.3rd, due to being interfered in ambient enviroment
The raising of frequency, the increasing of circuit work frequency, can be along lead with biography when interference signal is radiated wave filter exit
Defeated signal is transferred to by input terminal in equipment together, the sensing element inside jamming equipment, influences equipment work.
Utility model content
The goal of the invention of the utility model is：In view of the above problems, a kind of electromagnetic compatibility wave filter is provided, together
When have both the wave filter of high electrical-magnetic compatibility and high security, to solve, the protectiveness of wave filter institute access system is weak, signal
The problems such as tranception-quality difference and wave filter itself anti-interference are insufficient, and security reliability is low.
The technical solution adopted in the utility model is as follows：
Including metal shell, the resistance of metallic shield net and composition filter circuit, filter capacitor and fuse, the resistance
Parallel circuit is formed with the filter capacitor, the parallel circuit connects fuse, the fuse ground connection；The filter circuit
Input terminal and/or output terminal be also connected with fuse；The metallic shield net is mounted in the input terminal of the wave filter and/or defeated
It is seamlessly connected on the exit of outlet with 360 degree of the metal shell outer surface, and using high insulation between the exit
Material is isolated.
Further, the filter circuit is c-type filter circuit, and the c-type filter circuit includes resistance and filter capacitor group
Into parallel circuit；The parallel circuit connects fuse, the fuse ground connection；The input terminal of the filter circuit and/or
Output terminal is also connected with fuse.
Further, the filter circuit is LC type filter circuits, and the LC types filter circuit includes resistance and filter capacitor
The parallel circuit of composition, further includes filter inductance；The filter inductance is connect with the parallel circuit；The parallel circuit connection
Fuse, the fuse ground connection；The input terminal and/or output terminal of the filter circuit are also connected with fuse.
Further, the filter circuit is Pi type filter circuits, and the Pi types filter circuit includes first resistor and first
First parallel circuit of filter capacitor composition, second resistance and the second parallel circuit of the second filter capacitor composition, further include filter
Wave inductance；The filter inductance is connected between first parallel circuit and second parallel circuit；Described first is in parallel
Circuit connects the first fuse, the first fuse ground connection；The second fuse of the second parallel circuit connection, described second
Fuse is grounded；The input terminal and/or output terminal of the filter circuit are also connected with fuse.
Further, the filter circuit is T-shaped filter circuit, and the T-shaped filter circuit includes resistance and filter capacitor group
Into parallel circuit, further include the first inductance and the second inductance；The parallel circuit is connected to first inductance and described the
Between two inductance；The parallel circuit connects fuse, the fuse ground connection；The input terminal of the filter circuit and/or defeated
Outlet is also connected with fuse.
Further, the filter circuit is RC type filter circuits, and the RC types filter circuit includes first resistor and filtering
The parallel circuit of capacitance composition, further includes second resistance；The second resistance is connect with the parallel circuit；The parallel circuit
Connect fuse, the fuse ground connection；The input terminal and/or output terminal of the filter circuit are also connected with fuse.
Further, the metal shell of the wave filter is connected with the earth.
Further, the ground connection that is connected with the metal shell of the wave filter is crossed by the fuse and the metallic shield Netcom.
Further, the fuse is resistance-type quick fuse fuse.
Further, the length of the metallic shield net is consistent with the wire length of the exit.
In conclusion by adopting the above-described technical solution, the utility model meets the high electromagnetic compatibility of wave filter simultaneously
Property and high security this two big requirement, advantage be：
1st, install fuse additional in filter circuit input terminal and/or output terminal, it is therefore prevented that high current by when by wave filter phase
Whole circuit board situation about burning out even, effective protection circuit board, if wave filter is burnt out, need to only be individually replaced wave filter,
Production cost is greatly saved, is more suitable for the use of large-scale production；
2nd, filter capacitor absorbs the big energy that filter circuit is generated in spike, avoids signal wire and casing generation quiet
Electricity.When equipment is stopped, the residual amount of energy that bulky capacitor is deposited in a device can be lost by the resistance in parallel with it, and
And the electrostatic on signal wire between casing can also be discharged by resistance, enhance the reliability of equipment；
3rd, during equipment use, metallic shield net makes that equipment filter action is more notable, and antijamming capability is stronger, effectively
Avoid and interfered by the signal of wave filter by extraneous signal, improve use effect of product.In specific field of employment,
Only metallic shield net is installed additional in appropriate one end, filter effect is similarly apparent.
Description of the drawings
Fig. 1 is the electromagnetic compatibility Filter Principle figure of c-type filter circuit；
Fig. 2 is the electromagnetic compatibility Filter Principle figure of LC type filter circuits；
Fig. 3 is the electromagnetic compatibility Filter Principle figure of Pi type filter circuits；
Fig. 4 is the electromagnetic compatibility Filter Principle figure of T-shaped filter circuit；
Fig. 5 is the electromagnetic compatibility Filter Principle figure of RC type filter circuits；
Fig. 6 is the structure diagram of electromagnetic compatibility wave filter；
It is marked in figure：1 is metallic shield net；2 be metal shell.
Specific 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, the present invention is further described in detail.It should be appreciated that specific embodiment described herein is only explaining this
Utility model is not used to limit the utility model.
Any feature disclosed in this specification, unless specifically stated, can be equivalent by other or with similar purpose
Alternative features are replaced.That is, unless specifically stated, each feature is an example in a series of equivalent or similar characteristics
.
The utility model discloses a kind of electromagnetic compatibility wave filter, Fig. 1~Fig. 5 is 5 embodiments of the utility model, point
Circuit diagram when the utility model filter circuit is C, LC, Pi, T, RC type is not shown.The utility model is at shown 5
Identical technique effect can be played in embodiment.
In embodiment 1 as shown in Figure 1, on the basis of original c-type filter circuit, the utility model is by filter capacitor
C1 and resistance R1 form parallel circuit, when equipment works, filter capacitor C1 absorb filter circuit generated in spike it is a large amount of
Energy, so as to which signal wire and casing be avoided to generate electrostatic；When equipment is stopped, remaining energy that bulky capacitor C1 is deposited in a device
Amount can be lost, and the electrostatic on signal wire between casing can also be released by resistance R1 by the resistance R1 in parallel with it
It puts, enhances the reliability of equipment.The parallel circuit is connected and is grounded with fuse F11, when filter capacitor occur aging or
During damage, fuse F11 can play the protective effect to the utility model wave filter.The fuse is common resistance-type
Quick fuse fuse.As a preferred embodiment of the utility model, connected as shown in Figure 1 in the input terminal of filter circuit
Fuse F12, output terminal connection fuse F13, when the electric current of into and out wave filter is excessive, corresponding input terminal or defeated
Outlet fuse will fuse automatically, so as to which the circuit structures such as pair circuit board being connected with wave filter play a protective role, even if
Wave filter is burned out, and is also only replaced with to wave filter, without influencing whether other circuits thereafter, has been saved life well
Cost is produced, is more suitable for the use of large-scale production.Only it is the more excellent connection mode of one of which of the present embodiment shown in figure, it is practical
Only the fuse of one end connection wherein, i.e., described fuse it can be installed only at entrance or the exit of wave filter, protection effect
Fruit is equally obviously improved.
In embodiment 2 to embodiment 5 shown in Fig. 2 to Fig. 5, operation principle and 1 basic phase of embodiment illustrated in fig. 1
Together, its specific implementation process that details are not described herein.
The lead-out wire of external structure schematic diagrams of the Fig. 6 for the utility model, filter input end and output terminal is outside metal
The inside of shell 2 is pierced by, as exit, the metallic shield net 1 and 2 outer surface of metal shell outside metal shell 2
360 degree of seamless connections, and be isolated between the exit using high insulating materials, it both ensure that metallic shield net 1 and metal
Shell 2 is reliably electrically connected, and the metallic shield net 1 and the exit is made to have good insulating properties.The wave filter
Metal shell 2 with the earth be connected；The fuse and the metallic shield net 1 pass through the metal shell 2 with the wave filter
Be connected ground connection；The length of the metallic shield net 1 is consistent with the wire length of the exit.As the more excellent of the utility model
Embodiment is respectively mounted the metallic shield net 1, the metallic shield net 1 on the exit of filter input end and output terminal
It is consistent with the wire length of the exit, and by the ground connection that is connected with the metal shell 2, well ensure the company of shielding
Continuous property and integrality, make equipment filter action more notable.In this way, equipment is effectively prevented from while normal transmission electric signal
It is interfered by the signal of wave filter by extraneous signal, enhances the antijamming capability of wave filter, improve the use of product
Effect.In practical operation, certain particular places only install metallic shield net 1 on an exit additional wherein needed for,
It is similary that there is the filter effect significantly strengthened.
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)
1. a kind of electromagnetic compatibility wave filter, it is characterised in that：Include the electricity of metal shell, metallic shield net and composition filter circuit
Resistance, filter capacitor and fuse, the resistance form parallel circuit, the parallel circuit connection insurance with the filter capacitor
Silk, the fuse ground connection；The input terminal and/or output terminal of the filter circuit are also connected with fuse；The metallic shield
Net is mounted on the input terminal of the wave filter and/or the exit of output terminal and described 360 degree of seamless companies of metal shell outer surface
It connects, and is isolated between the exit using high insulating materials.
2. a kind of electromagnetic compatibility wave filter according to claim 1, it is characterised in that：The filter circuit is c-type filtering
Circuit, the c-type filter circuit include the parallel circuit that resistance and filter capacitor form；The parallel circuit connects fuse,
The fuse ground connection；The input terminal and/or output terminal of the filter circuit are also connected with fuse.
3. a kind of electromagnetic compatibility wave filter according to claim 1, it is characterised in that：The filter circuit is the filtering of LC types
Circuit, the LC types filter circuit include the parallel circuit that resistance and filter capacitor form, further include filter inductance；The filtering
Inductance is connect with the parallel circuit；The parallel circuit connects fuse, the fuse ground connection；The filter circuit it is defeated
Enter end and/or output terminal is also connected with fuse.
4. a kind of electromagnetic compatibility wave filter according to claim 1, it is characterised in that：The filter circuit is the filtering of Pi types
Circuit, the Pi types filter circuit include the first parallel circuit of first resistor and the first filter capacitor composition, second resistance with
Second parallel circuit of the second filter capacitor composition, further includes filter inductance；It is in parallel that the filter inductance is connected to described first
Between circuit and second parallel circuit；First parallel circuit connects the first fuse, the first fuse ground connection；
Second parallel circuit connects the second fuse, the second fuse ground connection；The input terminal of the filter circuit and/or defeated
Outlet is also connected with fuse.
5. a kind of electromagnetic compatibility wave filter according to claim 1, it is characterised in that：The filter circuit is T-shaped filtering
Circuit, the T-shaped filter circuit include the parallel circuit that resistance and filter capacitor form, and further include the first inductance and the second electricity
Sense；The parallel circuit is connected between first inductance and second inductance；The parallel circuit connects fuse, institute
State fuse ground connection；The input terminal and/or output terminal of the filter circuit are also connected with fuse.
6. a kind of electromagnetic compatibility wave filter according to claim 1, it is characterised in that：The filter circuit is the filtering of RC types
Circuit, the parallel circuit that the RC types filter circuit includes first resistor and filter capacitor forms, further includes second resistance；It is described
Second resistance is connect with the parallel circuit；The parallel circuit connects fuse, the fuse ground connection；The filter circuit
Input terminal and/or output terminal be also connected with fuse.
7. a kind of electromagnetic compatibility wave filter according to claim 1~6 any one, it is characterised in that：The wave filter
Metal shell with the earth be connected.
8. a kind of electromagnetic compatibility wave filter according to claim 1~6 any one, it is characterised in that：The fuse
The ground connection that is connected with the metal shell of the wave filter is crossed with the metallic shield Netcom.
9. a kind of electromagnetic compatibility wave filter according to claim 1~6 any one, it is characterised in that：The fuse
It is resistance-type quick fuse fuse.
10. a kind of electromagnetic compatibility wave filter according to claim 1~6 any one, it is characterised in that：The metal screen
The length for covering net is consistent with the wire length of the exit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721664491.5U CN207518473U (en) | 2017-12-04 | 2017-12-04 | A kind of electromagnetic compatibility wave filter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721664491.5U CN207518473U (en) | 2017-12-04 | 2017-12-04 | A kind of electromagnetic compatibility wave filter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207518473U true CN207518473U (en) | 2018-06-19 |
Family
ID=62543419
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721664491.5U Expired - Fee Related CN207518473U (en) | 2017-12-04 | 2017-12-04 | A kind of electromagnetic compatibility wave filter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207518473U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112351579A (en) * | 2020-11-02 | 2021-02-09 | 安徽研实科技有限公司 | Method for connecting PCB circuit and ground |
-
2017
- 2017-12-04 CN CN201721664491.5U patent/CN207518473U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112351579A (en) * | 2020-11-02 | 2021-02-09 | 安徽研实科技有限公司 | Method for connecting PCB circuit and ground |
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180619 Termination date: 20191204 |
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| CF01 | Termination of patent right due to non-payment of annual fee |