CN206452292U - Power-supply filter - Google Patents
Power-supply filter Download PDFInfo
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- CN206452292U CN206452292U CN201720093931.XU CN201720093931U CN206452292U CN 206452292 U CN206452292 U CN 206452292U CN 201720093931 U CN201720093931 U CN 201720093931U CN 206452292 U CN206452292 U CN 206452292U
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- common mode
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- supply filter
- electric capacity
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Abstract
The utility model discloses power-supply filter, belong to technical field of filtering, including plastic casing, PCB, common mode inductance, differential mode filter capacitor and common mode filtering electric capacity, the PCB is designed using four laminates；Using with small temperature drift, high stability, high q-factor common mode inductance, the winding method of common mode inductance is Double-wire parallel wound.This power-supply filter compared with prior art, efficiently solves the difficult technical problem of conventional power source wave filter degree of miniaturization, while having the bearing capacity of high current, can be widely applied to the fields such as differential mode and the suppression common mode electromagnetic interference suppression of power module.
Description
Technical field
The utility model is related to wave filter technology field, and in particular to a kind of power-supply filter of small size high current.
Background technology
With greatly developing for Power Electronic Technique, high frequency switch power is because it is in volume, weight, power density, effect
Plurality of advantages in terms of rate, is widely used in the every field such as industry, national defence, household appliances.But simultaneously, high frequency is opened
The application in powered-down source brings serious electromagnetic interference problem, wherein endanger maximum is exactly the Conduction Interference on power line.Mesh
Before, solve this problem most efficient method be exactly power port install power-supply filter, therefore power-supply filter into
For the indispensable important component of high frequency switch power.
In recent years, high frequency switch power starts to miniaturization and integrated development, and power-supply filter is used as solution electromagnetism
The main devices of interference, the requirement of harshness is proposed to its weight and volume and mounting means.But, conventional power source filtering
The big inconvenience of implementation volume of device is integrated, limits its Integration Design and application with power supply.
Utility model content
The utility model overcomes the deficiencies in the prior art there is provided a kind of power-supply filter, for solving conventional power source filter
The problem of ripple body product is big inconvenient integrated.
In view of the above mentioned problem of prior art, the utility model is used according to disclosed in the utility model on one side
Following technical scheme：
A kind of power-supply filter, including shell and the PCB being arranged in the shell, common mode inductance, differential mode filter
Ripple electric capacity and common mode filtering electric capacity；The PCB includes top layer, the second layer, third layer and bottom, and top layer is placed for device
Layer, the second layer is stratum, and third layer is bus plane, and bottom is mounting layer, the top layer, the second layer, the layer of third layer and bottom
It is connected between layer using hole；The common mode inductance, differential mode filter capacitor and common mode filtering electric capacity are fixed on institute by scolding tin
State the top layer of PCB.
In order to which the utility model is better achieved, further technical scheme is：
According to an embodiment of the present utility model, the common mode inductance is two, two common mode inductance series connection
Between input and output, the differential mode filter capacitor be four, four differential mode filter capacitors be connected in parallel on two it is described common
Between mould inductance, the common mode filtering electric capacity two, with the differential mode filter capacitor after two common mode filtering electric capacity series connection
Parallel connection, the common mode filtering capacity earth.
According to another embodiment of the present utility model, the shell is LCP plastics and uses injection molding.
According to another embodiment of the present utility model, plugging green oil is used in the hole.
According to another embodiment of the present utility model, the common mode inductance coiling is 0.22mm enamel-covered wire, coiling
Mode is Double-wire parallel wound.
According to another embodiment of the present utility model, the wire on the top layer and bottom uses the mode of plating respectively
Thicken to 50~60 μm.
According to another embodiment of the present utility model, the differential mode filter capacitor is using 1210 encapsulation.
According to another embodiment of the present utility model, the common mode filtering electric capacity is using 1812 encapsulation.
According to another embodiment of the present utility model, the common mode inductance, differential mode filter capacitor and common mode filtering electricity
Hold the welding with described PCB to weld using Reflow Soldering mode.
The utility model can also be：
According to another embodiment of the present utility model, the base material of the PCB is thickness 0.8mm FR4.
Compared with prior art, one of the beneficial effects of the utility model are：
A kind of power-supply filter of the present utility model, by mainly being subtracted using the component of printed circuit board and standard packaging
Small power supply wave filter volume, solves the problem of conventional power source wave filter volume is very much not just integrated, its stability height, small volume,
Compact conformation, processing are simple, it is adaptable to Switching Power Supply Integration Design, and the differential mode and common mode electromagnetism that can effectively reduce power supply are done
Disturb.
Brief description of the drawings
, below will be to embodiment for clearer explanation present specification embodiment or technical scheme of the prior art
Or the accompanying drawing used required in the description of prior art is briefly described, it should be apparent that, drawings in the following description are only
It is the reference to the embodiment of some in present specification, for those skilled in the art, is not paying creative work
In the case of, other accompanying drawings can also be obtained according to these accompanying drawings.
Fig. 1 is the shell mechanism schematic diagram according to the utility model one embodiment.
Fig. 2 is the power-supply filter internal structure schematic diagram according to the utility model one embodiment.
Fig. 3 is the circuit topological structure schematic diagram of the power-supply filter according to the utility model one embodiment.
Fig. 4 is the appearance schematic diagram of the power-supply filter according to the utility model one embodiment.
Wherein, it is entitled corresponding to the reference in accompanying drawing：
1- shells, 2-PCB circuit boards, 3- common mode inductances, 4- differential mode filter capacitors, 5- common mode filtering electric capacity.
Embodiment
The utility model is described in further detail with reference to embodiment, but embodiment of the present utility model is not
It is limited to this.
As depicted in figs. 1 and 2, Fig. 1 shows the shell mechanism according to the utility model one embodiment, and Fig. 2 is shown
According to the power-supply filter internal structure of the utility model one embodiment, a kind of power-supply filter, including shell 1 and it is arranged at
PCB 2, common mode inductance 3, differential mode filter capacitor 4 and common mode filtering electric capacity 5 in the shell 1；The PCB 2
Including top layer, the second layer, third layer and bottom, top layer is device placed layer, and the second layer is stratum, and third layer is bus plane, bottom
Layer is mounting layer, and top layer and bottom apply copper using large area；Then intensive punching is played, is connected, removed using the hole between layers
Outside pad, terminal pad, test point, plate face uniformly coats green solder mask coating, and uses plugging green oil；The common mode electricity
Sense 3, differential mode filter capacitor 4 and common mode filtering electric capacity 5 are fixed on the top layer of the PCB 2 by scolding tin.
With reference to shown in Fig. 3, Fig. 3 shows the circuit topology knot according to the power-supply filter of the utility model one embodiment
Structure, the common mode inductance 3 includes LND L1 and LND L2, and differential mode filter capacitor 4 includes CX1, CX2, CX3 and CX4, common mode filtering
Electric capacity 5 includes CY1 and CY2, and two common mode inductances 3 are connected between input and output, and the differential mode filter capacitor 4 is four
Individual, four differential mode filter capacitors 4 are connected in parallel between two common mode inductances 3, the common mode filtering electric capacity 5 two, two
The individual common mode filtering electric capacity 5 is in parallel with the differential mode filter capacitor 4 after connecting, and the common mode filtering electric capacity 5 is grounded.Above member
Device welding is packaged after finishing using the shell 1.Further, the shell 1 of encapsulation is moulded using resistant to elevated temperatures black LCP
Expect injection molding.
The coiling of common mode inductance 3 can be 0.22mm enamel-covered wire, and winding method can be Double-wire parallel wound, and inductance value can be 47
μ H ± 10%；Common mode inductance 3 has the feature of small temperature drift, high stability and high q-factor.
Differential mode filter capacitor 4 is encapsulated as 1210, and pressure-resistant is 100V, capacitance preferable 475；Common mode filtering electric capacity 5 is encapsulated as
1812, pressure-resistant is 1000V, capacitance preferable 473.
Common mode inductance 3, differential mode filter capacitor 4, common mode filtering electric capacity 5 are welded with PCB 2 using reflow soldering process
Connect；Encapsulation process is fixed using resistant to elevated temperatures binding agent.
The big power-supply filter of this miniaturization, can be installed using Surface Mount mode, can individually be applied, also can be with other electronics
Integration of equipments application.
The embodiment of each in this specification is described by the way of progressive, what each embodiment was stressed be with it is other
Identical similar portion cross-reference between the difference of embodiment, each embodiment.
" one embodiment ", " another embodiment ", " embodiment " for being spoken of in this manual, etc., refer to knot
Specific features, structure or the feature for closing embodiment description are included at least one embodiment of the application generality description
In.It is not necessarily to refer to same embodiment that statement of the same race, which occur, in multiple places in the description.Appoint furthermore, it is understood that combining
When one embodiment describes a specific features, structure or feature, what is advocated is this to realize with reference to other embodiment
Feature, structure or feature also fall in the range of the utility model.
Although reference be made herein to the utility model is described multiple explanatory embodiments of the present utility model, still,
It should be understood that those skilled in the art can be designed that a lot of other modification and embodiment, these modifications and embodiment
It will fall within spirit disclosed in the present application and spirit.More specifically, in disclosure and the scope of claim
It is interior, a variety of variations and modifications can be carried out to the building block and/or layout of theme composite configuration.Except to building block and/
Or outside the variations and modifications of layout progress, to those skilled in the art, other purposes also will be apparent.
Claims (10)
1. a kind of power-supply filter, it is characterised in that including shell (1) and the PCB being arranged in the shell (1)
(2), common mode inductance (3), differential mode filter capacitor (4) and common mode filtering electric capacity (5)；The PCB (2) includes top layer, the
Two layers, third layer and bottom, top layer are device placed layer, and the second layer is stratum, and third layer is bus plane, and bottom is mounting layer,
The top layer, the second layer, third layer and bottom are between layers connected using hole；The common mode inductance (3), differential mode filtered electrical
Hold (4) and common mode filtering electric capacity (5) is fixed on the top layer of the PCB (2) by scolding tin.
2. power-supply filter according to claim 1, it is characterised in that the common mode inductance (3) is two, described in two
Common mode inductance (3) is connected between input and output, and the differential mode filter capacitor (4) is four, four differential mode filtered electricals
Hold (4) to be connected in parallel between two common mode inductances (3), the common mode filtering electric capacity (5) two, two common mode filtering electricity
Hold in parallel with the differential mode filter capacitor (4) after (5) series connection, common mode filtering electric capacity (5) ground connection.
3. power-supply filter according to claim 1, it is characterised in that the shell (1) is LCP plastics and uses injection
Shaping.
4. power-supply filter according to claim 1, it is characterised in that use plugging green oil in the hole.
5. power-supply filter according to claim 1, it is characterised in that common mode inductance (3) coiling is 0.22mm paint
Envelope curve, winding method is Double-wire parallel wound.
6. power-supply filter according to claim 1, it is characterised in that the wire difference electricity consumption on the top layer and bottom
The mode of plating is thickeied to 50~60 μm.
7. power-supply filter according to claim 1, it is characterised in that the differential mode filter capacitor (4) uses 1210 envelopes
Dress.
8. power-supply filter according to claim 1, it is characterised in that the common mode filtering electric capacity (5) uses 1812 envelopes
Dress.
9. power-supply filter according to claim 1, it is characterised in that the common mode inductance (3), differential mode filter capacitor (4)
Welded with common mode filtering electric capacity (5) and the welding of described PCB (2) by the way of Reflow Soldering.
10. power-supply filter according to claim 1, it is characterised in that the base material of the PCB (2) is thickness
0.8mm FR4.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720093931.XU CN206452292U (en) | 2017-01-24 | 2017-01-24 | Power-supply filter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720093931.XU CN206452292U (en) | 2017-01-24 | 2017-01-24 | Power-supply filter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206452292U true CN206452292U (en) | 2017-08-29 |
Family
ID=59667027
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720093931.XU Active CN206452292U (en) | 2017-01-24 | 2017-01-24 | Power-supply filter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206452292U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108768159A (en) * | 2018-07-19 | 2018-11-06 | 深圳振华富电子有限公司 | Doubleway output DC power supply electromagnetic interface filter |
| CN111010025A (en) * | 2019-11-18 | 2020-04-14 | 深圳供电局有限公司 | Y capacitor asymmetric configuration circuit, circuit board, device and control method |
| CN114245603A (en) * | 2021-12-20 | 2022-03-25 | 中国电子科技集团公司第二十六研究所 | Radio frequency LC filter manufacturing method based on reflow soldering |
| CN115206677A (en) * | 2022-08-08 | 2022-10-18 | 珠海格力电器股份有限公司 | Common mode filter capacitor structure, PCB and wiring method thereof |
-
2017
- 2017-01-24 CN CN201720093931.XU patent/CN206452292U/en active Active
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108768159A (en) * | 2018-07-19 | 2018-11-06 | 深圳振华富电子有限公司 | Doubleway output DC power supply electromagnetic interface filter |
| CN108768159B (en) * | 2018-07-19 | 2024-05-31 | 深圳振华富电子有限公司 | Dual-output direct-current power supply EMI filter |
| CN111010025A (en) * | 2019-11-18 | 2020-04-14 | 深圳供电局有限公司 | Y capacitor asymmetric configuration circuit, circuit board, device and control method |
| CN111010025B (en) * | 2019-11-18 | 2021-07-06 | 深圳供电局有限公司 | Y capacitor asymmetric configuration circuit, circuit board, device and control method |
| CN114245603A (en) * | 2021-12-20 | 2022-03-25 | 中国电子科技集团公司第二十六研究所 | Radio frequency LC filter manufacturing method based on reflow soldering |
| CN114245603B (en) * | 2021-12-20 | 2024-01-30 | 中国电子科技集团公司第二十六研究所 | Radio frequency LC filter manufacturing method based on reflow soldering |
| CN115206677A (en) * | 2022-08-08 | 2022-10-18 | 珠海格力电器股份有限公司 | Common mode filter capacitor structure, PCB and wiring method thereof |
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