CN203104381U - Novel anti-interference electromagnetic compatible filter - Google Patents
Novel anti-interference electromagnetic compatible filter Download PDFInfo
- Publication number
- CN203104381U CN203104381U CN2013200809233U CN201320080923U CN203104381U CN 203104381 U CN203104381 U CN 203104381U CN 2013200809233 U CN2013200809233 U CN 2013200809233U CN 201320080923 U CN201320080923 U CN 201320080923U CN 203104381 U CN203104381 U CN 203104381U
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- inductance
- inductor
- input
- output end
- electric capacity
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Abstract
The utility model discloses a novel anti-interference electromagnetic compatible filter which comprises an input end and an output end, wherein the input end comprises a positive electrode input end and a negative electrode input end; the output end comprises a positive electrode output end and a negative electrode output end; a first inductor and a second inductor are connected in series between the positive electrode input end and the positive electrode output end; a third inductor and a fourth inductor are connected in series between the negative electrode input end and the negative electrode output end; one end, which is close to the first inductor, of the positive electrode input end and one end, which is close to the third inductor, of the negative electrode input end are connected with a first capacitor; the other end of the first inductor is connected with one end of the second inductor; the other end of the third inductor is connected with one end of the fourth inductor; a second capacitor is connected between the other end of the second inductor and the other end of the fourth inductor; and a third capacitor and a fourth capacitor are connected between the positive electrode output end and the negative electrode output end. The novel anti-interference electromagnetic compatible filter is extremely high in insulation property; and the interference resistance of the filter is obviously improved.
Description
Technical field
The utility model relates to a kind of filter, relates in particular to the significant New Anti-interference electromagnetic compatibility of a kind of isolation performance filter.
Background technology
Power-supply filter has another name called " power supply electromagnetic interface filter ", or " EMI power-supply filter ", it is a kind of passive bidirectional network, be a kind of electric equipment that the frequency or the frequency beyond this frequency of characteristic frequency in the power supply are carried out effective filtering, its end connects power supply, and the other end connects load.Existing DC wave filter is owing to the bad reason of the impedance matching of its inner filter network, cause isolation performance not high, can cause the misoperation of equipment because of signal disturbs when in the sophisticated product of high performance requirements, using, even may cause serious security incident.
Summary of the invention
The purpose of this utility model provides the significant New Anti-interference electromagnetic compatibility of a kind of isolation performance filter with regard to being in order to address the above problem.
The utility model is achieved through the following technical solutions above-mentioned purpose:
The utility model comprises input and output, described input comprises electrode input end and negative input, described output comprises cathode output end and cathode output end, be connected in series with first inductance and second inductance between described electrode input end and the described cathode output end, be connected in series with the 3rd inductance and the 4th inductance between described negative input and the described cathode output end, described electrode input end is connected with first electric capacity near an end of described first inductance and an end of close described the 3rd inductance of described negative input, the other end of described first inductance is connected with an end of described second inductance, the other end of described the 3rd inductance is connected with an end of described the 4th inductance, be connected with second electric capacity between the other end of the other end of described second inductance and described the 4th inductance, be connected with the 3rd electric capacity and the 4th electric capacity between described cathode output end and the described cathode output end.
Further, described the 3rd electric capacity is connected back ground connection with described the 4th electric capacity.
As preferably, the shared toroidal core of described first inductance and described the 3rd inductance.
Further, the input seat of filter and output seat all are arranged on the housing, and described input seat next door is provided with the earth terminal seat.
The beneficial effects of the utility model are:
Isolation performance of the present utility model is very high, has significantly improved the anti-tampering performance of filter, can use in the sophisticated product of high performance requirements.
Description of drawings
Fig. 1 is the front view of a kind of New Anti-interference electromagnetic compatibility of the utility model filter;
Fig. 2 is the left view of a kind of New Anti-interference electromagnetic compatibility of the utility model filter;
Fig. 3 is the internal circuit configuration schematic diagram of a kind of New Anti-interference electromagnetic compatibility of the utility model filter.
Embodiment
The utility model is described in further detail below in conjunction with accompanying drawing:
As shown in Figure 3, the utility model comprises input and output, input comprises electrode input end a and negative input b, output comprises cathode output end a1 and cathode output end b1, be connected in series with first inductance L 1 and second inductance L 2 between electrode input end a and the cathode output end a1, be connected in series with the 3rd inductance L 3 and the 4th inductance L 4 between negative input b and the cathode output end b1, electrode input end a is connected with first capacitor C 1 near an end of first inductance L 1 and an end of close the 3rd inductance L 3 of negative input b, the other end of first inductance L 1 is connected with an end of second inductance L 2, the other end of the 3rd inductance L 3 is connected with an end of the 4th inductance L 4, be connected with second capacitor C 2 between the other end of the other end of second inductance L 2 and the 4th inductance L 4, be connected with the 3rd capacitor C 3 and the 4th capacitor C 4 between cathode output end a1 and the cathode output end b1.
As shown in Figure 3, the 3rd capacitor C 3 is connected back ground connection with the 4th capacitor C 4.
As shown in Figure 3, first inductance L 1 and the 3rd inductance L 3 shared toroidal cores.
As depicted in figs. 1 and 2, the input seat 1 of filter and output seat 3 all are arranged on the housing 2, and input seat 1 next door is provided with earth terminal seat 4.
Claims (4)
1. New Anti-interference electromagnetic compatibility filter, comprise input and output, it is characterized in that: described input comprises electrode input end and negative input, described output comprises cathode output end and cathode output end, be connected in series with first inductance and second inductance between described electrode input end and the described cathode output end, be connected in series with the 3rd inductance and the 4th inductance between described negative input and the described cathode output end, described electrode input end is connected with first electric capacity near an end of described first inductance and an end of close described the 3rd inductance of described negative input, the other end of described first inductance is connected with an end of described second inductance, the other end of described the 3rd inductance is connected with an end of described the 4th inductance, be connected with second electric capacity between the other end of the other end of described second inductance and described the 4th inductance, be connected with the 3rd electric capacity and the 4th electric capacity between described cathode output end and the described cathode output end.
2. a kind of New Anti-interference electromagnetic compatibility filter according to claim 1 is characterized in that: described the 3rd electric capacity is connected back ground connection with described the 4th electric capacity.
3. a kind of New Anti-interference electromagnetic compatibility filter according to claim 1 is characterized in that: the shared toroidal core of described first inductance and described the 3rd inductance.
4. a kind of New Anti-interference electromagnetic compatibility filter according to claim 1, it is characterized in that: the input seat of filter and output seat all are arranged on the housing, and described input seat next door is provided with the earth terminal seat.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013200809233U CN203104381U (en) | 2013-02-22 | 2013-02-22 | Novel anti-interference electromagnetic compatible filter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013200809233U CN203104381U (en) | 2013-02-22 | 2013-02-22 | Novel anti-interference electromagnetic compatible filter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203104381U true CN203104381U (en) | 2013-07-31 |
Family
ID=48855755
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2013200809233U Expired - Fee Related CN203104381U (en) | 2013-02-22 | 2013-02-22 | Novel anti-interference electromagnetic compatible filter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203104381U (en) |
-
2013
- 2013-02-22 CN CN2013200809233U patent/CN203104381U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130731 Termination date: 20190222 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |