CN202334289U

CN202334289U - Fully-isolated direct-current power supply filter

Info

Publication number: CN202334289U
Application number: CN2011204638422U
Authority: CN
Inventors: 盛杰; 陈庆; 张成荣
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 fully-isolated 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 is connected between the first anode output end and the cathode output end; a second capacitor is connected between the second anode output end and the cathode output end; the first anode output end is grounded after being connected with a third capacitor; the cathode output end is grounded after being connected with a fourth capacitor; and the second anode output end is grounded after being connected with a fifth capacitor. The fully-isolated direct-current power supply filter has high compatibility, high isolating property, and has a firmer structure due to the adoption of parallel sealing weld.

Description

Full isolated DC power-supply filter

Technical field

The utility model relates to a kind of DC wave filter, relates in particular to the full isolated DC power-supply 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 this connection makes its structure built on the sand, can not realize sealing fully, and profile is also because of there being screw to seem attractive in appearance inadequately.

Summary of the invention

The purpose of the utility model provides the full isolated DC power-supply 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 with first electric capacity between said first cathode output end and the said cathode output end; Be connected with second electric capacity between said second cathode output end and the said cathode output end; Said first cathode output end is connected back ground connection with the 3rd electric capacity; Said cathode output end is connected back ground connection with the 4th electric capacity, said second cathode output end is connected back ground connection with the 5th electric capacity.

Further; Said input also comprises the first subsequent use input, the second subsequent use input, the 3rd subsequent use input; Said output also comprises the first subsequent use output, the second subsequent use output, the 3rd subsequent use output; 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, and the said the 3rd subsequent use input is connected with the said the 3rd subsequent use output.

As preferably, adopt parallel soldering and sealing to connect 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, adopts parallel soldering and sealing to make the utility model structure more firm, has realized sealing fully, and profile is also more level and smooth, attractive in appearance.

Description of drawings

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

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

Fig. 3 is the internal circuit configuration sketch map of the full isolated DC power-supply filter of the utility model.

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 with first capacitor C 1 between the first cathode output end A1 and the cathode output end B1; Be connected with second capacitor C 2 between the second cathode output end D1 and the cathode output end B1; The first cathode output end A1 is connected back ground connection with the 3rd capacitor C 3; Cathode output end B1 is connected back ground connection with the 4th capacitor C 4, the second cathode output end D1 is connected back ground connection with the 5th capacitor C 5.

As shown in Figure 3; Input also comprises the first subsequent use input E, the second subsequent use input F, the 3rd subsequent use input G; Output also comprises the first subsequent use output E1, the second subsequent use output F1, the 3rd subsequent use output G1; 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, and the 3rd subsequent use input G is connected with the 3rd subsequent use output G1.

As depicted in figs. 1 and 2, adopt parallel soldering and sealing to connect between the upper cover plate 2 of filter and the base 3.Input seat 1 places the top of upper cover plate 2, and output seat 4 places the below of base 3.

Claims

1. full isolated DC power-supply 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 with first electric capacity between said first cathode output end and the said cathode output end; Be connected with second electric capacity between said second cathode output end and the said cathode output end; Said first cathode output end is connected back ground connection with the 3rd electric capacity; Said cathode output end is connected back ground connection with the 4th electric capacity, said second cathode output end is connected back ground connection with the 5th electric capacity.

2. full 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, the 3rd subsequent use input; Said output also comprises the first subsequent use output, the second subsequent use output, 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.

3. full isolated DC power-supply 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.