CN202334286U - DC power filter with electromagnetic compatibility - Google Patents
DC power filter with electromagnetic compatibility Download PDFInfo
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- CN202334286U CN202334286U CN2011204601358U CN201120460135U CN202334286U CN 202334286 U CN202334286 U CN 202334286U CN 2011204601358 U CN2011204601358 U CN 2011204601358U CN 201120460135 U CN201120460135 U CN 201120460135U CN 202334286 U CN202334286 U CN 202334286U
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Abstract
The utility model discloses a DC power filter with electromagnetic compatibility comprising input ends and output ends, wherein the input ends comprise a first anode input end, a second anode input end and a cathode input end; the output ends comprise a first anode output end, a second anode output end and a cathode output end; a first inductor is connected between the first anode input end and the first anode output end, a third inductor is connected between the second anode input end and the second anode output end, and a second inductor is connected between the cathode input end and the cathode output end; a first capacitor and a second capacitor are serially connected between the first anode output end and the cathode output end, and a third capacitor and a fourth capacitor are serially connected between the second anode output end and the cathode output end. The DC power filter with electromagnetic compatibility of the utility model has the advantages of strong compatibility and good barrier property; besides, a cover plate is connected with a pedestal in a parallel sealing and welding manner, thereby guaranteeing a stable and firm structure for the utility model and realizing complete sealing.
Description
Technical field
The utility model relates to a kind of DC wave filter, relates in particular to the electromagnetic compatibility DC wave filter that a kind of compatibility is strong, isolation is good.
Background technology
Power-supply filter; Have another name called " power supply electromagnetic interface filter "; Or " EMI power-supply filter ", be a kind of passive bidirectional network, be a kind of electric equipment that the frequency or the frequency beyond this frequency of CF in the power supply are carried out effective filtering; Its end is to connect power supply, and the other end is to connect load.Existing DC wave filter is because the impedance matching of its inner filter network is bad, and it is not enough to cause inserting loss, and Electro Magnetic Compatibility is not high, isolation is good inadequately; In addition, the existing power supply filter generally is connected cover plate through screw with filter, and its structure is firm inadequately, and sealing is good inadequately, and possibly get into the performance that influences filter in the housing because of the moisture in the outside air.
Summary of the invention
The purpose of the utility model provides the electromagnetic compatibility DC wave filter that a kind of compatibility is strong, isolation is good with regard to being in order to address the above problem.
The utility model is realized above-mentioned purpose through following technical scheme:
The utility model comprises input and output; Said input comprises first electrode input end, second electrode input end and negative input; Said output comprises first cathode output end, second cathode output end and cathode output end; Be connected with first inductance between said first electrode input end and said first cathode output end; Be connected with the 3rd inductance between said second electrode input end and said second cathode output end, be connected with second inductance between said negative input and the said cathode output end; Be connected in series with first electric capacity and second electric capacity between said first cathode output end and the said cathode output end, be connected in series with the 3rd electric capacity and the 4th electric capacity between said second cathode output end and the said cathode output end.
Further, said first cathode output end is connected back ground connection with the 5th electric capacity, and said cathode output end is connected back ground connection with the 6th electric capacity, and said second cathode output end is connected back ground connection with the 7th electric capacity.
As preferably, adopt parallel soldering and sealing to connect between the upper cover plate of said filter and the base.
Further, the base of said filter is a semicylinder; The input of said filter and output all are arranged at the same side of said base.
The beneficial effect of the utility model is:
The utility model is compatible by force, isolation is good; Adopt parallel soldering and sealing to connect upper cover plate and base, make the utility model structure firm, realized sealing fully, and can prevent that the moisture in the outside air from getting in the housing, thereby guaranteed the high-performance of the utility model.
Description of drawings
Fig. 1 is the front view of the utility model electromagnetic compatibility DC wave filter;
Fig. 2 is the vertical view of the utility model electromagnetic compatibility DC wave filter;
Fig. 3 is the internal circuit configuration sketch map of the utility model electromagnetic compatibility DC wave filter.
Embodiment
Below in conjunction with accompanying drawing the utility model is described further:
As shown in Figure 3; The input of the utility model comprises the first electrode input end A, the second electrode input end D and negative input B; Output comprises the first cathode output end A1, the second cathode output end D1 and cathode output end B1; Be connected with between first inductance L, 1, the second electrode input end D and the second cathode output end D1 between the first electrode input end A and the first cathode output end A1 and be connected with the 3rd inductance L 3, be connected with second inductance L 2 between negative input B and the cathode output end B1; Be connected in series with between the first cathode output end A1 and the cathode output end B1 between first capacitor C 1 and second capacitor C, 2, the second cathode output end D1 and the cathode output end B1 and be connected in series with the 3rd capacitor C 3 and the 4th capacitor C 4.
As shown in Figure 3, the first cathode output end A1 is connected back ground connection with the 5th capacitor C 5, and cathode output end B1 is connected back ground connection with the 6th capacitor C 6, and the second cathode output end D1 is connected back ground connection with the 7th capacitor C 7.
As depicted in figs. 1 and 2, adopt parallel soldering and sealing to connect between the upper cover plate 1 of filter and the base 2.The base 2 of filter is a semicylinder; The input 3 and the output 4 of filter all is arranged at the same side of base 2.Input 3 is corresponding with the first electrode input end A, the second electrode input end D and negative input B among Fig. 3, and output 4 is corresponding with the first cathode output end A1, the second cathode output end D1 and cathode output end B1 among Fig. 3.
Claims (4)
1. electromagnetic compatibility DC wave filter; Comprise input and output; It is characterized in that: said input comprises first electrode input end, second electrode input end and negative input; Said output comprises first cathode output end, second cathode output end and cathode output end; Be connected with first inductance between said first electrode input end and said first cathode output end, be connected with the 3rd inductance between said second electrode input end and said second cathode output end, be connected with second inductance between said negative input and the said cathode output end; Be connected in series with first electric capacity and second electric capacity between said first cathode output end and the said cathode output end, be connected in series with the 3rd electric capacity and the 4th electric capacity between said second cathode output end and the said cathode output end.
2. electromagnetic compatibility DC wave filter according to claim 1; It is characterized in that: said first cathode output end is connected back ground connection with the 5th electric capacity; Said cathode output end is connected back ground connection with the 6th electric capacity, said second cathode output end is connected back ground connection with the 7th electric capacity.
3. electromagnetic compatibility DC wave filter according to claim 1 is characterized in that: adopt parallel soldering and sealing to connect between the upper cover plate of said filter and the base.
4. electromagnetic compatibility DC wave filter according to claim 1 is characterized in that: the base of said filter is a semicylinder; The input of said filter and output all are arranged at the same side of said base.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204601358U CN202334286U (en) | 2011-11-18 | 2011-11-18 | DC power filter with electromagnetic compatibility |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204601358U CN202334286U (en) | 2011-11-18 | 2011-11-18 | DC power filter with electromagnetic compatibility |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202334286U true CN202334286U (en) | 2012-07-11 |
Family
ID=46446251
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011204601358U Expired - Fee Related CN202334286U (en) | 2011-11-18 | 2011-11-18 | DC power filter with electromagnetic compatibility |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202334286U (en) |
-
2011
- 2011-11-18 CN CN2011204601358U patent/CN202334286U/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: 20120711 Termination date: 20181118 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |