CN202334276U

CN202334276U - Isolating direct-current power filter

Info

Publication number: CN202334276U
Application number: CN2011204617002U
Authority: CN
Inventors: 盛杰; 刘道德; 任红军
Original assignee: Chengdu Bikong Science and Technology Co Ltd
Current assignee: Chengdu Bikong Science and Technology Co Ltd
Priority date: 2011-11-18
Filing date: 2011-11-18
Publication date: 2012-07-11
Anticipated expiration: 2021-11-18

Abstract

The utility model discloses an isolating direct-current power filter. The power filter comprises a cover plate, a base, input ends and output ends, wherein the cover plate is connected with the base; the input ends include a first anode input end, a second anode input end and a cathode input end; the output ends include 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 in series; a second inductor is connected between the second anode input end and the second anode output end in series; a third inductor is connected between the cathode input end and the cathode output end in series; a first capacitor is connected between the first anode input end and the cathode input end; and a second capacitor is connected between the second anode input end and the cathode input end. The power filter has good isolation and a stable structure and can prevent the external humidity from affecting the filter performance of the power filter.

Description

The isolated DC power-supply filter

Technical field

The utility model relates to a kind of DC wave filter, relates in particular to the isolated DC power-supply filter that a kind of isolation is good, structure is firm.

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 does not cause its isolation performance undesirable owing to filter circuit construction is good; In addition, existing DC wave filter generally is connected cover plate through screw with filter, and this connection makes its structure built on the sand, can not realize sealing fully, makes moist easily, causes that the various aspects of performance of filter descends.

Summary of the invention

The purpose of the utility model provides the isolated DC power-supply filter that a kind of isolation is good, structure is firm 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 interconnective cover plate, base and input and output; Said input comprises first electrode input end, second electrode input end and a negative input; Said output comprises first cathode output end, second cathode output end and a cathode output end; Be connected in series with first inductance between said first electrode input end and said first cathode output end; Be connected in series with second inductance between said second electrode input end and said second cathode output end; Be connected in series with the 3rd inductance between said negative input and the said cathode output end, be connected with first electric capacity between said first electrode input end and the said negative input, be connected with second electric capacity between said second electrode input end and the said negative input.

Further, said first cathode output end connects ground connection behind the 3rd electric capacity, and said cathode output end connects ground connection behind the 4th electric capacity, and said second cathode output end connects ground connection behind the 5th electric capacity.

Further; Said input also comprises the first subsequent use input and the second subsequent use input; Said output also comprises the first subsequent use output and the second subsequent use output, and the said first subsequent use input is connected with the said first subsequent use output, and the said second subsequent use input is connected with the said second subsequent use output; The said first subsequent use output connects ground connection behind the 6th electric capacity, and the said second subsequent use output connects ground connection behind the 7th electric capacity.

As preferably, the shared toroidal core of said first inductance, said second inductance and said the 3rd inductance.

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 isolation of the utility model is good, structure is firm, 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 utility model isolated DC power-supply filter;

Fig. 2 is the left view of the utility model isolated DC power-supply filter;

Fig. 3 is the right view of the utility model isolated DC power-supply filter;

Fig. 4 is the vertical view of the utility model isolated DC power-supply filter;

Fig. 5 is the internal circuit configuration sketch map of the utility model isolated DC power-supply filter.

Embodiment

Below in conjunction with accompanying drawing the utility model is described further:

Like Fig. 1, Fig. 2, Fig. 3 and shown in Figure 4, be that parallel soldering and sealing connects between the upper cover plate 2 of filter and the base 3.Input seat 1 is positioned at the top of upper cover plate 2, and output seat 5 is positioned at the below of base 3, and output lead 4 is drawn from output seat 5.

As shown in Figure 5; The input of the utility model comprises the first electrode input end A, the second electrode input end D and a negative input B; Output comprises the first cathode output end A1, the second cathode output end D1 and a cathode output end B1; Be connected in series with first inductance L 1 between the first electrode input end A and the first cathode output end A1; Be connected in series with second inductance L 2 between the second electrode input end D and the second cathode output end D1; Be connected in series with between negative input B and the cathode output end B1 to be connected with between first capacitor C, 1, the second electrode input end D and the negative input B between the 3rd inductance L 3, the first electrode input end A and the negative input B and be connected with second capacitor C 2.

As shown in Figure 5, the first cathode output end A1 connects the 3rd capacitor C 3 back ground connection, and cathode output end B connects the 4th capacitor C 4 back ground connection, and the second cathode output end D connects the 5th capacitor C 5 back ground connection.

As shown in Figure 5; Input also comprises the first subsequent use input E and the second subsequent use input F; Output also comprises the first subsequent use output E1 and the second subsequent use output F1, and the first subsequent use input E is connected with the first subsequent use output E1, and the second subsequent use input F is connected with the second subsequent use output F1; The first subsequent use output E1 connects the 6th capacitor C 6 back ground connection, and the second subsequent use output F1 connects the 7th capacitor C 7 back ground connection.

As shown in Figure 5, first inductance L 1, second inductance L 2 and the 3rd inductance L 3 shared toroidal cores.

Claims

1. isolated DC power-supply filter; Comprise interconnective cover plate, base and input and output; It is characterized in that: said input comprises first electrode input end, second electrode input end and a negative input; Said output comprises first cathode output end, second cathode output end and a cathode output end; Be connected in series with first inductance between said first electrode input end and said first cathode output end, be connected in series with second inductance between said second electrode input end and said second cathode output end, be connected in series with the 3rd inductance between said negative input and the said cathode output end; Be connected with first electric capacity between said first electrode input end and the said negative input, be connected with second electric capacity between said second electrode input end and the said negative input.

2. isolated DC power-supply filter according to claim 1; It is characterized in that: said first cathode output end connects ground connection behind the 3rd electric capacity; Said cathode output end connects ground connection behind the 4th electric capacity, and said second cathode output end connects ground connection behind the 5th electric capacity.

3. isolated DC power-supply filter according to claim 1; It is characterized in that: said input also comprises the first subsequent use input and the second subsequent use input; Said output also comprises the first subsequent use output and the second subsequent use output; The said first subsequent use input is connected with the said first subsequent use output; The said second subsequent use input is connected with the said second subsequent use output, and the said first subsequent use output connects ground connection behind the 6th electric capacity, and the said second subsequent use output connects ground connection behind the 7th electric capacity.

4. isolated DC power-supply filter according to claim 1 is characterized in that: the shared toroidal core of said first inductance, said second inductance and said the 3rd inductance.

5. isolated 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.