CN2850126Y - Power filter capable of preventing electromagnetic pulse - Google Patents
Power filter capable of preventing electromagnetic pulse Download PDFInfo
- Publication number
- CN2850126Y CN2850126Y CN 200520076891 CN200520076891U CN2850126Y CN 2850126 Y CN2850126 Y CN 2850126Y CN 200520076891 CN200520076891 CN 200520076891 CN 200520076891 U CN200520076891 U CN 200520076891U CN 2850126 Y CN2850126 Y CN 2850126Y
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- protector
- electromagnetic pulse
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- protection device
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Abstract
The utility model discloses a power filter capable of preventing electromagnetic pulse. The utility model comprises a filter circuit and an electromagnetic pulse protection device, an incoming line of the electromagnetic pulse protection device is connected with one incoming line of the filter circuit and an outgoing line of the electromagnetic pulse protection device is connected with an earth line of the filter circuit. The electromagnetic pulse protection device is composed of a protector, a bidirectional diode a decoupling component. The input ends of the protector and the bidirectional diode are respectively connected with the incoming line of the electromagnetic pulse protection device. The output ends of the protector and the bidirectional diode are connected with the earth line. The utility model is characterized in that the decoupling component is connected with the incoming line which is positioned between the connection point of the protector and the incoming line and the connection point of the bidirectional diode and the incoming line. The utility model with simple structure has the characteristics of effectively filtering the high-frequency electromagnetic pulse, preventing the primitive filter and the devices of a shielded chamber be free from damage, etc. The utility model solves the problem that the filter used for the primitive shielded chamber can not normally work under the disturbance of high frequency pulse.
Description
Technical field
The utility model relates to a kind of power-supply filter of tempest, belongs to electronic technology field.
Background technology
The used filter of existing shielded enclosure is a kind of indispensable device of shielding indoor equipment.It is bringing into play significantly positive role for suppressing along the electromagnetic interference of power line conduction.
Along with the development of modern science and technology, more and more higher for the Capability Requirement of the anti-electromagnetic interference of shielded enclosure equipment especially military equipment, confidential information equipment etc.How to guarantee that shielded enclosure equipment harasses operate as normal under the nuclear blast environment for example at the high frequency of burst, become the technical problem that to face and to need to be resolved hurrily at present.And the used filter of existing shielded enclosure not only is difficult to accomplish this point, and the equipment in said filter and the shielded enclosure, also can be subjected to the destruction of electromagnetic pulse.
Summary of the invention
The purpose of this utility model, being provides the high-frequency electromagnetic pulse that happens suddenly on a kind of effectively filtering circuit, protects the power-supply filter of the tempest of used filter of said shielded enclosure and shielding indoor equipment.To solve the technical problem that needs to be resolved hurrily at present.
The utility model realizes that the conception of the technical scheme of its purpose is; on the basis of the original filter of shielded enclosure equipment; before its input, install the Electro-Magnetic Pulse Protection device additional; to reach the equipment in original filter of protection and the shielded enclosure; can not be subjected to the harassing and wrecking and the destruction of electromagnetic pulse, thereby realize the purpose of this utility model.
The utility model realizes that the technical scheme of its purpose is, a kind of power-supply filter of tempest, comprise filter circuit, its improvement is: comprise that also its inlet wire is connected with the inlet wire of filter circuit, the Electro-Magnetic Pulse Protection device that its outlet is connected with the ground wire of filter circuit; Said Electro-Magnetic Pulse Protection device is made up of protector, bidirectional diode and decoupling component; The input of protector and bidirectional diode is connected with the inlet wire of Electro-Magnetic Pulse Protection device respectively, and the output of protector and bidirectional diode all is connected with ground wire; Decoupling component is connected the tie point of protector and inlet wire, and on the said inlet wire between the tie point of bidirectional diode and inlet wire.
Can understand by above given technical scheme; the utility model is owing to installed the Electro-Magnetic Pulse Protection device additional before original filter input end; and before entering original filter, eliminated along the electromagnetic interference of power line conduction, thereby realized the purpose of this utility model with regard to bypass.
The further improvement of the utility model point is:
Said protector is a zinc oxide varistor.Certainly, said protector can adopt other metal oxide piezoresistive wafer also to be fine.But in order to improve sensitivity and the reliability that the utility model resists the electromagnetic pulse of instantaneous relase, the preferred protector of the utility model is that the response time is less than the 12ns zinc oxide varistor of (nanosecond).
Said decoupling component is composed in series by feedthrough capacitor and inductance.Its purpose obviously is further to improve the series impedance of electromagnetic protection device of the present utility model, and makes the electromagnetic pulse of high fdrequency component reflect back and eliminate by protector; The pulse signal of low frequency component then can be by entering original filter.Certainly, adopt other decoupling component that can block the high fdrequency component electromagnetic pulse also to be fine.
After technique scheme was implemented, what the utility model had was simple in structure, and equipment in original filter and shielded enclosure characteristics such as be not damaged are protected in effectively filtering high-frequency electromagnetic pulse, are conspicuous.
Description of drawings
Fig. 1 is the circuit diagram of a kind of embodiment of the utility model;
Fig. 2 is as Electro-Magnetic Pulse Protection manipulated or operated apparatus shown in Figure 1.
Embodiment
In fact seen given accompanying drawing, can understand that the utility model realizes the technical scheme of its purpose, below in conjunction with the description of accompanying drawing by embodiment, the utility model is described in further detail.
A kind of typical embodiment is asked for an interview attached Fig. 1 and 2.
A kind of power-supply filter of tempest comprises filter circuit 1, comprises that also its inlet wire 2-1 is connected with the inlet wire 1-1 of filter circuit 1, the Electro-Magnetic Pulse Protection device 2 that its outlet 2-2 is connected with the ground wire 1-2 of filter circuit 1; Said Electro-Magnetic Pulse Protection device 2 is made up of protector 2-3, bidirectional diode 2-4 and decoupling component 2-5; The input of protector 2-3 and bidirectional diode 2-4 is connected with the inlet wire 2-1 of Electro-Magnetic Pulse Protection device 2 respectively, and the output of protector 2-3 and bidirectional diode 2-4 all is connected with ground wire 1-2; Decoupling component 2-5 is connected the tie point of protector 2-3 and inlet wire 2-1, and on the said inlet wire 2-1 between the tie point of bidirectional diode 2-4 and inlet wire 2-1.Said protector 2-3 is a zinc oxide varistor.Said decoupling component 2-5 is composed in series by feedthrough capacitor and inductance.
And said original filter circuit, as shown in Figure 1.Said filter circuit 1 is made up of 2 feedthrough capacitor C1,2 shunt capacitance C2 and 3 inductance L; Feedthrough capacitor C1 is located at input and the output of inlet wire 1-1 respectively, and the shell of feedthrough capacitor C1 is connected with ground wire 1-2; Inductance L is connected in series on the inlet wire 1-1 between input end capacitor C1 and the output capacitor C1; The input of shunt capacitance C2 is connected with inlet wire 1-1 between adjacent two inductance L, and the output of shunt capacitance C2 is connected with ground wire 1-2.
By accompanying drawing 1 as seen, the utility model can be by shared one road ground wire of multiple power supplies inlet wire.Can reduce cost like this.
The utility model as described above, the trial effect of its lab scale sample is good.A kind of typical anti-nuclear electromagnetic pulse ability of the present utility model is, the nuclear electromagnetic pulse rising edge ascending time is 3～12ns, inserts loss 〉=60dB when pulsewidth 700ms, peak value field intensity 10kv～30kv/m.It can adapt to the operate as normal under the high-frequency electromagnetic impulsive condition fully.
Claims (3)
1, a kind of power-supply filter of tempest, comprise filter circuit (1), it is characterized in that: comprise that also its inlet wire (2-1) is connected with the inlet wire (1-1) of filter circuit (1), the Electro-Magnetic Pulse Protection device (2) that its outlet (2-2) is connected with the ground wire (1-2) of filter circuit (1); Said Electro-Magnetic Pulse Protection device (2) is made up of protector (2-3), bidirectional diode (2-4) and decoupling component (2-5); Protector (2-3) is connected with the inlet wire (2-1) of Electro-Magnetic Pulse Protection device (2) respectively with both inputs of bidirectional diode (2-4), and protector (2-3) all is connected with ground wire (1-2) with both outputs of bidirectional diode (2-4); Decoupling component (2-5) is connected the tie point of protector (2-3) and inlet wire (2-1), and on the said inlet wire (2-1) between the tie point of bidirectional diode (2-4) and inlet wire (2-1).
2, the power-supply filter of tempest according to claim 1 is characterized in that: said protector (2-3) is a zinc oxide varistor.
3, the power-supply filter of tempest according to claim 1 is characterized in that: said decoupling component (2-5) is composed in series by feedthrough capacitor and inductance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520076891 CN2850126Y (en) | 2005-10-26 | 2005-10-26 | Power filter capable of preventing electromagnetic pulse |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520076891 CN2850126Y (en) | 2005-10-26 | 2005-10-26 | Power filter capable of preventing electromagnetic pulse |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2850126Y true CN2850126Y (en) | 2006-12-20 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200520076891 Expired - Fee Related CN2850126Y (en) | 2005-10-26 | 2005-10-26 | Power filter capable of preventing electromagnetic pulse |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2850126Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103391063A (en) * | 2013-07-16 | 2013-11-13 | 北京伊斯普电子技术有限公司 | Integrated nuclear electromagnetic pulse resistant signal filter |
| CN110445473A (en) * | 2019-08-27 | 2019-11-12 | 江苏沃姆克科技有限公司 | A kind of EMP power-supply filter |
-
2005
- 2005-10-26 CN CN 200520076891 patent/CN2850126Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103391063A (en) * | 2013-07-16 | 2013-11-13 | 北京伊斯普电子技术有限公司 | Integrated nuclear electromagnetic pulse resistant signal filter |
| CN110445473A (en) * | 2019-08-27 | 2019-11-12 | 江苏沃姆克科技有限公司 | A kind of EMP power-supply filter |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |