CN202334279U

CN202334279U - Reinforced isolation direct-current power supply filter

Info

Publication number: CN202334279U
Application number: CN2011204624928U
Authority: CN
Inventors: 盛杰; 刘道德; 陈庆
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 a reinforced isolation direct-current power supply filter, which comprises an input end and an output end, wherein the input end comprises a first anode input end, a second anode input end and a cathode input end; the output end comprises 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; a second inductor is connected between the cathode input end and the cathode output end; a first capacitor and a third capacitor are connected between the first anode output end and the cathode output end in parallel; and a second capacitor and a fourth capacitor are connected between the second anode output end and the cathode output end in parallel. The reinforced isolation direct-current power supply filter disclosed by the utility model has the advantages of being strong in compatibility, good in isolation and steady in structure and can prevent the filter performance from being influenced by external humidity.

Description

Reinforce the isolated DC power-supply filter

Technical field

The utility model relates to a kind of DC wave filter, relates in particular to the reinforcing 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 causes its Signal Spacing effect 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, and this connection makes its structure built on the sand, can not realize sealing fully, and maybe be because extraneous moisture influences the filtering performance of filter.

Summary of the invention

The purpose of the utility model provides the reinforcing 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 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 parallel to first electric capacity and the 3rd electric capacity between said first cathode output end and the said cathode output end, be connected in parallel to second 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 connects ground connection behind the 5th electric capacity, and said cathode output end connects ground connection behind the 6th electric capacity, and said second cathode output end connects ground connection behind the 7th electric capacity.

Further; Said input also comprises the first subsequent use input, the second subsequent use input and the 3rd subsequent use input; Said output also comprises the first subsequent use output, the second subsequent use output and the 3rd 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 the 3rd subsequent use input is connected with the said the 3rd subsequent use output; The said first subsequent use output connects ground connection behind the 8th electric capacity, and the said second subsequent use output connects ground connection behind the 9th electric capacity, and the said the 3rd subsequent use output connects ground connection behind the tenth electric capacity.

As preferably, 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, and can avoid extraneous moisture to influence the filtering performance of the utility model.

Description of drawings

Fig. 1 is the front view that the utility model is reinforced the isolated DC power-supply filter;

Fig. 2 is the vertical view that the utility model is reinforced the isolated DC power-supply filter;

Fig. 3 is the internal circuit configuration sketch map that the utility model is reinforced the isolated 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 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 parallel between the first cathode output end A1 and the cathode output end B1 between first capacitor C 1 and the 3rd capacitor C 3, the second cathode output end D1 and the cathode output end B1 and be connected in parallel to second capacitor C 2 and the 4th capacitor C 4.

As shown in Figure 3, the first cathode output end A1 connects the 5th capacitor C 5 back ground connection, and cathode output end B1 connects the 6th capacitor C 6 back ground connection, and the second cathode output end D1 connects the 7th capacitor C 7 back ground connection.

As shown in Figure 3; Input also comprises the first subsequent use input E, the second subsequent use input F and the 3rd subsequent use input G; Output also comprises the first subsequent use output E1, the second subsequent use output F1 and the 3rd subsequent use output G1, 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 3rd subsequent use input G is connected with the 3rd subsequent use output G1; The first subsequent use output E1 connects the 8th capacitor C 8 back ground connection, and the second subsequent use output F1 connects the 9th capacitor C 9 back ground connection, and the 3rd subsequent use output G1 connects the tenth capacitor C 10 back ground connection.

As depicted in figs. 1 and 2, 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 4 is positioned at the below of base 3, and output lead 5 is drawn from output seat 4.

Claims

1. reinforce the isolated DC power-supply filter for one kind; 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 parallel to first electric capacity and the 3rd electric capacity between said first cathode output end and the said cathode output end, be connected in parallel to second electric capacity and the 4th electric capacity between said second cathode output end and the said cathode output end.

2. reinforcing isolated DC power-supply filter according to claim 1; It is characterized in that: said first cathode output end connects ground connection behind the 5th electric capacity; Said cathode output end connects ground connection behind the 6th electric capacity, and said second cathode output end connects ground connection behind the 7th electric capacity.

3. reinforcing isolated DC power-supply filter according to claim 1; It is characterized in that: said input also comprises the first subsequent use input, the second subsequent use input and the 3rd subsequent use input; Said output also comprises the first subsequent use output, the second subsequent use output and the 3rd 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 the 3rd subsequent use input is connected with the said the 3rd subsequent use output, and the said first subsequent use output connects ground connection behind the 8th electric capacity; The said second subsequent use output connects ground connection behind the 9th electric capacity, and the said the 3rd subsequent use output connects ground connection behind the tenth electric capacity.

4. reinforcing 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.