CN206490581U - A kind of Switching Power Supply for strengthening Electro Magnetic Compatibility - Google Patents
A kind of Switching Power Supply for strengthening Electro Magnetic Compatibility Download PDFInfo
- Publication number
- CN206490581U CN206490581U CN201720167750.7U CN201720167750U CN206490581U CN 206490581 U CN206490581 U CN 206490581U CN 201720167750 U CN201720167750 U CN 201720167750U CN 206490581 U CN206490581 U CN 206490581U
- Authority
- CN
- China
- Prior art keywords
- power supply
- module
- electric capacity
- filtration module
- outer casing
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Landscapes
- Filters And Equalizers (AREA)
- Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)
- Dc-Dc Converters (AREA)
Abstract
The utility model discloses a kind of Switching Power Supply for strengthening Electro Magnetic Compatibility, belong to field of switch power, the Switching Power Supply includes outer casing of power supply, power module, filtration module, input lead and output lead；Outer casing of power supply is made of metal, power module and filtration module are arranged on inside outer casing of power supply, the input connection input lead of power module is simultaneously fully contacted with outer casing of power supply, the output end of power module connects the input of filtration module, the output end connection output lead of filtration module is simultaneously fully contacted with outer casing of power supply, and the outside of input lead and output lead is enclosed with metal screen layer；The utility model has effectively completely cut off Electromagnetic Interference and the extraneous Contamination of Electromagnetic Wave internal circuit of isolation that Switching Power Supply is outwards launched, and can effectively improve the Electro Magnetic Compatibility of Switching Power Supply, can finally coordinate electrical equipment entirely through electromagnetic compatibility test.
Description
Technical field
The utility model is related to field of switch power, especially a kind of Switching Power Supply for strengthening Electro Magnetic Compatibility.
Background technology
Switching Power Supply is to utilize modern power electronics technology, the time ratio that controlling switch pipe is turned on and off, and remains steady
Determine a kind of power supply of output voltage, it is received and be widely applied with small-sized, light weight and efficient feature.But Switching Power Supply is certainly
Body can cause stronger electromagnetic interference, and these electromagnetic interferences can not only have undesirable effect to its power supply unit, can also pass through
To surrounding, other electric equipments are interfered spatial.Present electronics industry increasingly emphasizes the electromagnetic compatibility problem of equipment,
Therefore the design to Switching Power Supply proposes higher requirement.
Utility model content
The applicant is regarding to the issue above and technical need, it is proposed that a kind of Switching Power Supply of reinforcement Electro Magnetic Compatibility.
The technical solution of the utility model is as follows：
A kind of Switching Power Supply for strengthening Electro Magnetic Compatibility, it is characterised in that Switching Power Supply includes power module, filtering mould
Block, outer casing of power supply, input lead and output lead；Outer casing of power supply is made of metal, and power module and filtration module are arranged on electricity
Source enclosure, the input connection input lead of power module is simultaneously fully contacted, the output end of power module with outer casing of power supply
The input of filtration module is connected, the output end connection output lead of filtration module is simultaneously fully contacted with outer casing of power supply, and input is led
The outside of line and output lead is enclosed with metal screen layer.
Its further technical scheme is that filtration module includes the first inductance, the first electric capacity, the second inductance, the second electric capacity
With the 3rd electric capacity, the first inductance, the first electric capacity, the second inductance, the series connection of the second electric capacity, the first end connection filtering of this series circuit
One end of the positive input terminal of module and the 3rd electric capacity, this series circuit the second end connection filtration module negative input end and
The common port of the other end of 3rd electric capacity, the first inductance and the first electric capacity connects the positive output end of filtration module, the second inductance and
The common port of second electric capacity connects the common end grounding of the negative output terminal of filtration module, the first electric capacity and the second electric capacity.
Advantageous effects of the present utility model are：
1st, outer casing of power supply is made of metal, can effectively completely cut off Electromagnetic Interference that Switching Power Supply outwards launches and every
Extraneous Contamination of Electromagnetic Wave internal circuit, can effectively improve the Electro Magnetic Compatibility of Switching Power Supply absolutely, can assist final
Coordinate electrical equipment entirely through electromagnetic compatibility test.
2nd, using the wire with metal screen layer, by fully being contacted with outer casing of power supply, can effectively shield from wire to
The electromagnetic wave of external world's transmitting.
3rd, filtration module is added in the output end of power module, can be effective for the filtering of power module outlet
Ground all plays inhibitory action to differential mode noise and common-mode noise, reduces the noise jamming that Switching Power Supply is produced, prevents interference effect
To the electrical equipment being connected with Switching Power Supply；Increase filtration module in Switching Power Supply simultaneously, user oneself installation can be saved
The step of wave filter, the volume of equipment is reduced, electrical equipment is effectively protected.
Brief description of the drawings
Fig. 1 is structural representation of the present utility model.
Fig. 2 is the circuit diagram of the filtration module in Switching Power Supply of the present utility model.
Fig. 3 is the circuit diagram of the embodiment of the utility model one.
Fig. 4 is the test result of the EMC tests of Switching Power Supply of the present utility model.
Fig. 5 is the test result of the EMC tests of existing Switching Power Supply.
Embodiment
Embodiment of the present utility model is described further below in conjunction with the accompanying drawings.
Fig. 1 is structural representation of the present utility model, the disclosed switch electricity for strengthening Electro Magnetic Compatibility of the utility model
Source, including outer casing of power supply 11, power module 12, filtration module 13, input lead 14 and output lead 15.
Outer casing of power supply 11 is made of metal, optionally, and outer casing of power supply 11 is made up of full-aluminum alloy, and outer casing of power supply 11 leads to
Often include housing and cover plate, housing is integrally formed, good sealing effect.Power module 12 and filtration module 13 are arranged on outer casing of power supply
Inside 11, specifically, power module 12 and filtration module 13 are set in the housing, and sealed by cover plate.
Power module 12 is the circuit module for being used in existing Switching Power Supply realize the function of Switching Power Supply, power module
12 input connection input lead 14 is simultaneously fully contacted with outer casing of power supply 11, and the outer wrap of input lead 14 has metallic shield
Layer, can effectively shield the electromagnetic wave outwardly launched by input lead 14, when actually realizing, typically wire outer wrap
Coated metal screen layer again outside rubber layer, rubber layer, as shown in Figure 1.
The input of filtration module 13 connects the output end of power module 12, and filtration module 13 is used for defeated to power module 12
The output signal for going out end output is filtered, including filters out the differential mode noise and/or common-mode noise in output signal.Filtration module
13 output end connection output lead 15 is simultaneously fully contacted with outer casing of power supply 11, and the outside of output lead 15 is also enclosed with metal screen
Cover layer.
Fig. 2 shows a kind of possible circuit structure of filtration module 13.
As shown in Fig. 2 filtration module 13 include the first inductance L1, the first electric capacity C1, the second inductance L2, the second electric capacity C2 and
3rd electric capacity C3, the first inductance L1, the first electric capacity C1, the second electric capacity C2 and the second inductance L2 series connection, the first of this series circuit
The positive input terminal of end connection filtration module 13 and the 3rd electric capacity C3 one end, the second end connection filtration module of this series circuit
The other end of 13 negative input end and the 3rd electric capacity C3, positive input terminal and negative input end the connection power supply mould of the filtration module 13
Block 12.First inductance L1 and the first electric capacity C1 common port connect the positive output end of filtration module 13, the second inductance L2 and second
Electric capacity C2 common port connects the common end grounding of the negative output terminal of filtration module 13, the first electric capacity C1 and the second electric capacity C2, should
Positive output end and negative output terminal the connection output lead of filtration module 13.
When implementing, the disclosed Switching Power Supply for strengthening Electro Magnetic Compatibility of the utility model can be that AC/DC is opened
Powered-down source or DC/DC Switching Power Supplies, illustrate that the utility model is disclosed so that the Switching Power Supply is AC/DC Switching Power Supplies as an example below
Switching Power Supply circuit structure diagram in actual applications.
As shown in figure 3, external ac power source connects alternating current filter, the input lead that alternating current filter passes through Switching Power Supply
Connecting valve power supply, Switching Power Supply connects electrical equipment by output lead.The operation principle of the circuit is：External ac power source
The 220V alternating currents of output first pass through an external alternating current filter and are filtered, then pass through the input with metal screen layer
Wire is input to the Switching Power Supply in the utility model, and the Transformer Rectifier of power module, Yi Jijing are passed through inside Switching Power Supply
After the noise filtering for crossing filtration module, it is output to by the output lead with metal screen layer in electrical equipment.
In the electronic circuit as shown in figure 3, Electro Magnetic Compatibility (Electro Magnetic are carried out to Switching Power Supply
Compatibility, EMC) test measured result as shown in figure 4, and the Switching Power Supply in the circuit shown in Fig. 3 is existing
Switching Power Supply, that is to say not built-in filtration module, without using all-metal outer casing of power supply, also without using leading with metal screen layer
During the Switching Power Supply of line, the measured result of emc testing is carried out to Switching Power Supply as shown in figure 5, comparison diagram 4 and Fig. 5
Test result can be seen that Switching Power Supply of the present utility model and be effectively improved electromagnetic compatibility compared to existing Switching Power Supply
Performance.
Above-described is only preferred embodiment of the present utility model, and the utility model is not limited to above example.Can
To understand, what those skilled in the art directly exported or associated on the premise of spirit of the present utility model and design is not departed from
Oher improvements and changes, are considered as being included within protection domain of the present utility model.
Claims (2)
1. a kind of Switching Power Supply for strengthening Electro Magnetic Compatibility, it is characterised in that the Switching Power Supply includes outer casing of power supply, power supply
Module, filtration module, input lead and output lead；The outer casing of power supply is made of metal, the power module and the filter
Ripple module is arranged on inside the outer casing of power supply, the input of the power module connect the input lead and with the power supply
Shell is fully contacted, and the output end of the power module connects the input of the filtration module, the output of the filtration module
The connection output lead in end is simultaneously fully contacted with the outer casing of power supply, and the outside of the input lead and the output lead is equal
It is enclosed with metal screen layer.
2. Switching Power Supply according to claim 1, it is characterised in that the filtration module includes the first inductance (L1), the
One electric capacity (C1), the second inductance (L2), the second electric capacity (C2) and the 3rd electric capacity (C3), first inductance (L1), the first electric capacity
(C1), the second electric capacity (C2) and the second inductance (L2) series connection, the first end of this series circuit connect the just defeated of the filtration module
Enter end and one end of the 3rd electric capacity (C3), the second end of this series circuit connect the negative input end of the filtration module with
And the other end of the 3rd electric capacity (C3), the common port connection of first inductance (L1) and first electric capacity (C1) is described
The common port of the positive output end of filtration module, second inductance (L2) and second electric capacity (C2) connects the filtration module
Negative output terminal, the common end grounding of first electric capacity (C1) and second electric capacity (C2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720167750.7U CN206490581U (en) | 2017-02-23 | 2017-02-23 | A kind of Switching Power Supply for strengthening Electro Magnetic Compatibility |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720167750.7U CN206490581U (en) | 2017-02-23 | 2017-02-23 | A kind of Switching Power Supply for strengthening Electro Magnetic Compatibility |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206490581U true CN206490581U (en) | 2017-09-12 |
Family
ID=59762634
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720167750.7U Active CN206490581U (en) | 2017-02-23 | 2017-02-23 | A kind of Switching Power Supply for strengthening Electro Magnetic Compatibility |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206490581U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112510991A (en) * | 2020-12-15 | 2021-03-16 | 中国电子科技集团公司第四十四研究所 | EMC protection device and power supply front end filter circuit of small-size photoelectric conversion subassembly |
-
2017
- 2017-02-23 CN CN201720167750.7U patent/CN206490581U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112510991A (en) * | 2020-12-15 | 2021-03-16 | 中国电子科技集团公司第四十四研究所 | EMC protection device and power supply front end filter circuit of small-size photoelectric conversion subassembly |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US8228152B2 (en) | Transforming device of power source and transformer thereof | |
| CN105263283B (en) | A kind of warship handheld terminal | |
| CN112510991B (en) | EMC protection device of small-sized photoelectric conversion assembly and power supply front-end filter circuit | |
| CN206490581U (en) | A kind of Switching Power Supply for strengthening Electro Magnetic Compatibility | |
| CN104200078A (en) | Method for restraining electromagnetic interference (EMI) | |
| CN201523135U (en) | socket with electromagnetic interference suppression | |
| CN203193504U (en) | Power supply adapter for proofing information leakage | |
| CN209345009U (en) | A kind of the stand-by motor control device and system of high electrical-magnetic compatibility energy | |
| WO2023165587A1 (en) | Circuit for reducing electromagnetic interference, distribution box, new energy vehicle, and method therefor | |
| CN203466073U (en) | Capacitor | |
| CN105896187A (en) | Safety socket with function of electromagnetic leakage prevention | |
| CN206602763U (en) | A kind of anti-electromagnetic interference circuit module | |
| CN202502967U (en) | Residual current breaker | |
| CN206180980U (en) | EMI filter | |
| CN207099040U (en) | A kind of power-supply filter | |
| CN201766250U (en) | Module type electric connector | |
| CN221509549U (en) | Small power filter with metal package | |
| CN101420842B (en) | Equipment for reducing overproof radiation caused by electricity power line | |
| CN207339628U (en) | A kind of DTU power supplys | |
| CN210862989U (en) | Electromagnetic compatibility circuit, sensor circuit, and sensor | |
| CN219843426U (en) | Anti-electromagnetic interference leakage detection protection circuit | |
| CN100365903C (en) | Single-phase AC inputting electromagnetic interference killer circuit | |
| CN206259849U (en) | Electromagnetic compatibility filter circuit and household electrical appliance | |
| CN215817917U (en) | Disturbance suppression device for electric fast transient pulse group | |
| CN202713144U (en) | Electromagnetic compatibility anti-interference system of DC (Direct Current) motor |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |