CN202334290U

CN202334290U - Flat-sealing reinforced DC power filter

Info

Publication number: CN202334290U
Application number: CN2011204638969U
Authority: CN
Inventors: 盛杰; 刘家沛; 任红军
Original assignee: Chengdu Bikong Science and Technology Co Ltd
Current assignee: Chengdu Bikong Science and Technology Co Ltd
Priority date: 2011-11-21
Filing date: 2011-11-21
Publication date: 2012-07-11
Anticipated expiration: 2021-11-21

Abstract

The utility model discloses a flat-sealing reinforced DC power filter comprising input ends and output ends, wherein the input ends comprise an anode input end and a cathode input end; the output ends comprise an anode output end and a cathode output end; a first inductor and a third inductor are serially connected between the anode input end and the anode output end, a second inductor and a fourth inductor are serially connected between the cathode input end and the cathode output end, and a first capacitor is connected between the end close to the second inductor of the first inductor and the end close to the fourth inductor of the third inductor. The flat-sealing reinforced DC power filter of the utility model has the advantages of strong compatibility, good barrier property, firm and stable structure, smooth and beautiful outline, and capability of avoiding the external moisture from affecting the wave filtering property of the utility model.

Description

Flat envelope stabilization DC power supply filter

Technical field

The utility model relates to a kind of DC wave filter, relates in particular to that a kind of isolation is good, structure is firm, the level and smooth flat envelope stabilization DC power supply filter attractive in appearance of profile.

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 causes its isolation performance good inadequately because the impedance matching of its inner filter network is bad; In addition; The existing power supply filter generally is connected cover plate through screw with filter, this connection makes its structure built on the sand, can not realize sealing fully; Profile is also because of there being screw to seem attractive in appearance inadequately, and maybe be because extraneous moisture influence the filtering performance of filter.

Summary of the invention

Isolation is good, structure is firm, the level and smooth a kind of flat envelope stabilization DC power supply filter attractive in appearance of profile with regard to being to provide in order to address the above problem for the purpose of the utility model.

The utility model is realized above-mentioned purpose through following technical scheme:

The utility model comprises input and output; Said input comprises electrode input end and negative input; Said output comprises cathode output end and cathode output end; Be connected in series with first inductance and the 3rd inductance between said electrode input end and the said cathode output end; Be connected in series with second inductance and the 4th inductance between said negative input and the said cathode output end, said first inductance is near being connected with first electric capacity between end of said second inductance and the end of said the 3rd inductance near said the 4th inductance.

Particularly, the shared toroidal core of said the 3rd inductance and said the 4th inductance.

Further, be connected in series with second electric capacity and the 3rd electric capacity between said cathode output end and the said cathode output end, the connecting line ground connection between said second electric capacity and said the 3rd electric capacity.

Further, be that parallel soldering and sealing connects between the upper cover plate of said filter and the base.

The beneficial effect of the utility model is:

The utility model is compatible by force, isolation is good, structure is firm, profile is smoothly attractive in appearance, and can avoid extraneous moisture to influence the filtering performance of the utility model.

Description of drawings

Fig. 1 is the front view of the flat envelope of the utility model stabilization DC power supply filter;

Fig. 2 is the vertical view of the flat envelope of the utility model stabilization DC power supply filter;

Fig. 3 is the internal circuit configuration sketch map of the flat envelope of the utility model stabilization DC power supply 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 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 the 3rd inductance L 3 between electrode input end A and the cathode output end A1; Be connected in series with second inductance L 2 and the 4th inductance L 4, the first inductance L 1 between negative input B and the cathode output end B1 near being connected with first capacitor C 1 between end of second inductance L 2 and the end of the 3rd inductance L 3 near the 4th inductance L 4.

As shown in Figure 3, the 3rd inductance other and the 4th inductance two shared toroidal cores.

As shown in Figure 3, be connected in series with the connecting line ground connection between second capacitor C 2 and the 3rd capacitor C 3, the second capacitor C 2 and the 3rd capacitor C 3 between cathode output end A1 and the cathode output end B1.

As depicted in figs. 1 and 2, be that parallel soldering and sealing connects between the upper cover plate 5 of filter and the base 4.Input 1, output 3 and earth terminal 2 all are positioned at the top of upper cover plate 5, and wherein, input 1 is corresponding with electrode input end A and negative input B among Fig. 3, and output 3 is corresponding with cathode output end A1 and cathode output end B1 among Fig. 3.

Claims

1. put down envelope stabilization DC power supply filter for one kind; Comprise input and output; It is characterized in that: said input comprises electrode input end and negative input; Said output comprises cathode output end and cathode output end; Be connected in series with first inductance and the 3rd inductance between said electrode input end and the said cathode output end, be connected in series with second inductance and the 4th inductance between said negative input and the said cathode output end, said first inductance is near being connected with first electric capacity between end of said second inductance and the end of said the 3rd inductance near said the 4th inductance.

2. flat envelope stabilization DC power supply filter according to claim 1 is characterized in that: the shared toroidal core of said the 3rd inductance and said the 4th inductance.

3. flat envelope stabilization DC power supply filter according to claim 1; It is characterized in that: be connected in series with second electric capacity and the 3rd electric capacity between said cathode output end and the said cathode output end, the connecting line ground connection between said second electric capacity and said the 3rd electric capacity.

4. flat envelope stabilization DC power supply filter according to claim 1 is characterized in that: connect for parallel soldering and sealing between the upper cover plate of said filter and the base.