CN208078896U - A kind of EMC power supply architectures - Google Patents
A kind of EMC power supply architectures Download PDFInfo
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- CN208078896U CN208078896U CN201820667806.XU CN201820667806U CN208078896U CN 208078896 U CN208078896 U CN 208078896U CN 201820667806 U CN201820667806 U CN 201820667806U CN 208078896 U CN208078896 U CN 208078896U
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Abstract
The utility model discloses a kind of EMC power supply architectures, including bottom case to form seal cavity with the cover board on bottom case, bottom case and cover board is covered；The both ends of cover board are respectively arranged with external power input and power output end, it is respectively arranged with the sub- cavity of input at the inside both ends of seal cavity and exports sub- cavity, it inputs in sub- cavity and is provided with input filter unit, it exports and is provided with output filter unit in sub- cavity, power panel is provided in the seal cavity except sub- cavity inputting sub- cavity and exporting, external power input, input filter unit, power panel, output filter unit and power output end are sequentially connected.The power supply architecture reduces time cost and economic cost while meeting subsystem Electromagnetic Launching and sensitivity requirement.
Description
Technical field
The utility model belongs to technical field of electromagnetic compatibility, more specifically, is related to a kind of EMC power supply architectures.
Background technology
People increasingly pay close attention to the electromagnetic compatibility problem of electronic equipment at present, especially the conducted emission of electronic equipment and
Radiation emissions problem directly influences the health of people, so requiring also more and more harsher to the EMC of electronic equipment and getting over
Carry out more specification.According to GJB151B-2003《Military equipment and subsystem Electromagnetic Launching and sensitivity requirement》, ground force's ground power supply mould
Block need to meet the requirement to input lead conducted emission and conducted susceptibility, while also to meet and send out output lead electric field radiation
Penetrate the requirement with electric field radiation susceptibility.But existing power supply module cannot meet whole requirements, need to build circuit again or take
Other measures could meet, to solve the problems, such as the EMC of power module, it has to by changing and testing repeatedly, will cause in this way
R&D cycle extends and product cost increases, thus by technological improvement reduce EMC power modules time cost and it is economical at
Originally seem most important.
Utility model content
The purpose of the utility model is to overcome the deficiencies in the prior art, provide a kind of EMC power supply architectures, the power supply architecture
While meeting subsystem Electromagnetic Launching and sensitivity requirement, time cost and economic cost are reduced.
In order to realize that above-mentioned purpose of utility model, the technical solution that the utility model solves above-mentioned technical problem are as follows：
A kind of EMC power supply architectures, including bottom case form sealing with the cover board on the bottom case, the bottom case and cover board is covered
Cavity；The both ends of the cover board are respectively arranged with external power input and power output end, in the inside of the seal cavity
Both ends are respectively arranged with the sub- cavity of input and export sub- cavity, and input filter unit is provided in the sub- cavity of input, described
It exports and is provided with output filter unit in sub- cavity, be provided with inputting sub- cavity and exporting in the seal cavity except sub- cavity
It is respectively arranged with the first wire installation and the second wire installation on power panel, the sub- cavity of input and the sub- cavity of output, it is described
Input filter unit includes cascade first differential mode filter circuit and the first common mode filtering circuit；The first differential mode filter circuit
External power input is connected, first common mode filtering circuit connects the input terminal of power panel by the first wire installation；Institute
It includes cascade second differential mode filter circuit and the second common mode filtering circuit to state output filter unit；The output end of the power panel
The input terminal of the second differential mode filter circuit is connected by the second wire installation；Second common mode filtering circuit connects power supply
Output end.
The utility model has the beneficial effects that：Setting inputs sub- cavity and defeated in the seal cavity that bottom case and cover board are formed
Go out sub- cavity, while power panel be set inputting sub- cavity and exporting in the seal cavity except sub- cavity, make the sub- cavity of input,
Power panel and the electromagnetic environment exported in sub- cavity are mutual indepedent, effective by input filter unit before the input terminal of power panel
Ground inhibits influence of the input current intermediate cam wave to Conduction Interference, meets in national standard GJB151B-2003 and is passed to input lead
Lead transmitting and the requirement of conducted susceptibility；The high-frequency noise and spike of power panel generation are effectively inhibited by exporting filter unit
Interference meets the requirement to output lead electric field radiation transmitting and electric field radiation susceptibility in national standard GJB151B-2003；
The utility model meets requirements of the standard GB/T l7743-1999 about EMC simultaneously.Compared with existing power module, for
Single interference source will reach under same rejection ability, and cost is much lower；It is provided simultaneously with the extremely strong filtering energy to interference sources
Power, therefore, the utility model shorten the R&D cycle, reduce economic cost.
Further, the first differential mode filter circuit includes the differential mode inductance L1 and differential mode capacitor for being connected on power input
Cl, first common mode filtering circuit include common mode capacitance C2, C3 of cascade common mode inductance L2, L3 and concatenation, the common mode
One end of capacitance C2 connects the first secondary end of the common mode inductance L2, the other end and the common mode electricity of the common mode capacitance C2
The one end for holding C3 is connected to ground altogether, and the other end of the common mode capacitance C3 connects the second subprime end of the common mode inductance L2, is used for
The inrush current shock of the overwhelming majority of alternating current is inhibited within the safe range that late-class circuit can be born.
Further, further include the differential mode capacitor C4 for being connected in parallel on common mode inductance L3 second subprimes end, for filtering out high frequency telecommunications
Number.
Further, the second differential mode filter circuit includes the differential mode capacitor C5 for being connected in parallel on power panel output end；Described
Two common mode filtering circuits include common mode capacitance C7, C8 of cascade common mode inductance L4, L5 and concatenation, and the one of the common mode capacitance C7
End connects the first secondary end of the common mode inductance L4, one end of the other end of the common mode capacitance C7 and the common mode capacitance C8
It is connected to ground altogether, the other end of the common mode capacitance C8 connects the second subprime end of the common mode inductance L4, for filtering out power panel
The high-frequency noise and pulse spike of output.
Further, further include being connected in parallel on the differential mode capacitor C6 at common mode inductance L4 second subprimes end, and be connected in parallel on common mode electricity
The differential mode capacitor C9 for feeling L5 second subprimes end, for high frequency electrical signal and instantaneous pressure High-frequency Interference electric signal to be suppressed, from
And the waveform of the output electric signal is made more to tend to be straight.
Description of the drawings
Fig. 1 is the vertical view of the utility model power supply architecture；
Fig. 2 is the utility model power supply architecture cut-away view；
Fig. 3 is the utility model power supply architecture schematic diagram；
Fig. 4 is the utility model input filter unit schematic diagram；
Fig. 5 is the utility model output filter unit schematic diagram.
In attached drawing, 1- inputs sub- cavity；2- exports sub- cavity；3- seal cavities；The first wire installations of 4-；The second conducting wires of 5-
Device；6- cover boards；7- bottom cases；8- external power inputs；9- power output ends.
Specific implementation mode
Specific embodiment of the present utility model is described below in conjunction with the accompanying drawings, more so as to those skilled in the art
Understand the utility model well.It is detailed when known function and design requiring particular attention is that in the following description
Perhaps, when description can desalinate the main contents of the utility model, these descriptions will be ignored herein.
Fig. 1 is the vertical view of the utility model power supply architecture；Fig. 2 is the utility model power supply architecture cut-away view；Fig. 3 is this
Utility model power supply architecture schematic diagram.
As shown in Figure 1 to Figure 3, the utility model cannot meet GJB151B-2003 military equipments for existing power supply module
With subsystem Electromagnetic Launching and sensitivity requirement, it is proposed that a kind of EMC power supply architectures, including bottom case 7 and cover on the bottom case 7
Cover board 6, the bottom case 7 and cover board 6 form seal cavity 3；The both ends of the cover board 6 are respectively arranged with external power input 8
With power output end 9, it is respectively arranged with the sub- cavity 1 of input at the inside both ends of the seal cavity 3 and exports sub- cavity 2, institute
It states to input in sub- cavity 1 and is provided with input filter unit, described export in sub- cavity 2 is provided with output filter unit, is inputting
It sub- cavity 1 and exports and is provided with power panel in seal cavity 3 except sub- cavity 2, the sub- cavity 1 of the input and export sub- cavity
The first wire installation 4 and the second wire installation 5 are respectively arranged on 2, the input filter unit includes cascade first differential mode
Filter circuit and the first common mode filtering circuit；The first differential mode filter circuit connects external power input 8, and described first is total
Mould filter circuit connects the input terminal of power panel by the first wire installation 4；The output filter unit includes cascade second
Differential mode filter circuit and the second common mode filtering circuit；The output end of the power panel connects described by the second wire installation 5
The input terminal of two differential mode filter circuits；Second common mode filtering circuit connects power output end 9.
The utility model forms the sub- cavity 1 of setting input in seal cavity 3 in bottom case 7 and cover board 6 and exports sub- cavity 2,
While inputting sub- cavity 1 and exporting setting power panel in the seal cavity 3 except sub- cavity 2, make the sub- cavity 1 of input, power supply
Plate and the electromagnetic environment exported in sub- cavity 2 are mutual indepedent, before the input terminal of power panel effectively by input filter unit
Inhibit influence of the input current intermediate cam wave to Conduction Interference, meets in national standard GJB151B-2003 and input lead is conducted
The requirement of transmitting and conducted susceptibility；By exporting, filter unit effectively inhibits the high-frequency noise of power panel generation and spike is done
It disturbs, meets the requirement to output lead electric field radiation transmitting and electric field radiation susceptibility in national standard GJB151B-2003；Together
When the utility model meet requirements of the standard GB/T l7743-1999 about EMC.Compared with existing power module, for list
One interference source will reach under same rejection ability, and cost is much lower；It is provided simultaneously with the extremely strong filter capacity to interference sources,
Therefore, the utility model shortens the R&D cycle, reduces economic cost.
Fig. 4 is the utility model input filter unit schematic diagram.
As shown in figure 4, the first differential mode filter circuit includes the differential mode inductance L1 and differential mode for being connected on power input
Capacitance Cl, the differential mode inductance L1 carry out the DM EMI of entrance to inhibit electric current sharp wave and filtering so that common mode inductance L2 exists
Do not occur self-oscillation when interference is by itself, while differential mode capacitor Cl and differential mode capacitor C4 constitute π type filter circuits, will not go out
Existing inductance moment close to saturated phenomenon, improves the damping of filter circuit.
First common mode filtering circuit includes common mode capacitance C2, C3 of cascade common mode inductance L2, L3 and concatenation, described
One end of common mode capacitance C2 connects the first secondary end of the common mode inductance L2, the other end of the common mode capacitance C2 with it is described total
One end of mould capacitance C3 is connected to ground altogether, and the other end of the common mode capacitance C3 connects the second subprime end of the common mode inductance L2.
Further include the differential mode capacitor C4 for being connected in parallel on common mode inductance L3 second subprimes end.The common mode inductance L2, common mode capacitance C2 and common mode
The level-one LC filter circuits that capacitance C3 is constituted will pass through with the high-voltage electricity of AC influence signal by common mode inductance L2, common mode electricity
Hold the level-one LC filter circuits that C2 and common mode capacitance C3 are constituted, interference signal will largely be absorbed by common mode inductance L2, prevention to be become
At magnetic strength and thermal energy, remaining major part switches to ground by common mode capacitance C2, common mode capacitance C3, meanwhile, pass through common mode inductance L3
With differential mode capacitor C4 by last remaining interference common mode and DM EMI carry out damping filtering, just compared in output end
Pure power supply, the input power for power panel used as power panel effectively reduce dry after power inlet filter
Disturb voltage and interference electric current.
The power panel is power circuit common in the art, is repeated no more herein.
Fig. 5 is the utility model output filter unit schematic diagram.
As shown in figure 5, the second differential mode filter circuit includes the differential mode capacitor C5 for being connected in parallel on power panel output end；It is described
Second common mode filtering circuit includes common mode capacitance C7, C8 of cascade common mode inductance L4, L5 and concatenation, the common mode capacitance C7's
One end connects the first secondary end of the common mode inductance L4, the other end of the common mode capacitance C7 and the one of the common mode capacitance C8
End is connected to ground altogether, and the other end of the common mode capacitance C8 connects the second subprime end of the common mode inductance L4.The common mode inductance
The common mode filtering circuit that L4, L5, common mode capacitance C7 and common mode capacitance C8 are constituted will pass through with the high-voltage electricity of interference signal by altogether
The two-stage LC filter circuits that mould inductance L4, L5, common mode capacitance C7 and common mode capacitance C8 are constituted, interference signal largely will be by common mode
Inductance L4, L5, which prevent to absorb, becomes magnetic strength and thermal energy, and remaining major part switches to ground by common mode capacitance C7, common mode capacitance C8,
This can inhibit the effect of EMI interference signals, and purer power supply is just obtained in output end, for load.Pass through output
Filter unit effectively inhibits high-frequency noise and the spike interference of power panel generation, and it is right in national standard GJB151B-2003 to meet
Output lead electric field radiation emits and the requirement of electric field radiation susceptibility；The utility model meets standard GB/T l7743- simultaneously
1999 requirement about EMC.
Further include being connected in parallel on the differential mode capacitor C6 at common mode inductance L4 second subprimes end, and be connected in parallel on common mode inductance L5 second
The differential mode capacitor C9 of secondary end is acted on using the charge and discharge of capacitance, and it is dry to absorb the transient state that a part of switch motion moment generates
It disturbs, to achieve the purpose that reduce glitch.
In conclusion EMC power modules provided by the utility model, can meet GJB151B-2003《Military equipment and
Subsystem Electromagnetic Launching and sensitivity requirement》The EMC power modules that middle ground force ground requires, for time cost and economic cost
More demanding occasion.
Although the illustrative specific implementation mode of the utility model is described above, in order to the art
Technical staff understands the utility model, it should be apparent that the utility model is not limited to the range of specific implementation mode, to this technology
For the those of ordinary skill in field, as long as various change is in the essence of the utility model that the attached claims limit and determine
In god and range, these variations are it will be apparent that all utilize the innovation and creation of the utility model design in the row of protection.
Claims (5)
1. a kind of EMC power supply architectures, which is characterized in that including bottom case and cover the cover board on the bottom case, the bottom case and lid
Plate forms seal cavity；The both ends of the cover board are respectively arranged with external power input and power output end, in the sealing
The inside both ends of cavity are respectively arranged with the sub- cavity of input and export sub- cavity, and input filter is provided in the sub- cavity of input
Unit, described export in sub- cavity are provided with output filter unit, are inputting sub- cavity and are exporting the seal chamber except sub- cavity
It is provided with power panel in vivo, the first wire installation and the second conducting wire are respectively arranged on the sub- cavity of input and the sub- cavity of output
Device, the input filter unit include cascade first differential mode filter circuit and the first common mode filtering circuit；Described first is poor
Mould filter circuit connects external power input, and first common mode filtering circuit connects power panel by the first wire installation
Input terminal；The output filter unit includes cascade second differential mode filter circuit and the second common mode filtering circuit；The power supply
The output end of plate connects the input terminal of the second differential mode filter circuit by the second wire installation；The second common mode filtering electricity
Road connects power output end.
2. EMC power supply architectures according to claim 1, which is characterized in that the first differential mode filter circuit includes series connection
In the differential mode inductance L1 and differential mode capacitor Cl of power input, first common mode filtering circuit includes cascade common mode inductance
One end of common mode capacitance C2, C3 of L2, L3 and concatenation, the common mode capacitance C2 connects first grade of the common mode inductance L2
One end of end, the other end of the common mode capacitance C2 and the common mode capacitance C3 are connected to ground altogether, and the common mode capacitance C3's is another
End connects the second subprime end of the common mode inductance L2.
3. EMC power supply architectures according to claim 2, which is characterized in that further include being connected in parallel on common mode inductance L3 second
The differential mode capacitor C4 at grade end.
4. EMC power supply architectures according to claim 1, which is characterized in that the second differential mode filter circuit includes parallel connection
In the differential mode capacitor C5 of power supply unit output end；Second common mode filtering circuit includes cascade common mode inductance L4, L5 and string
Common mode capacitance C7, C8 connect, one end of the common mode capacitance C7 connect the first secondary end of the common mode inductance L4, the common mode
One end of the other end of capacitance C7 and the common mode capacitance C8 are connected to ground altogether, and the other end connection of the common mode capacitance C8 is described total
The second subprime end of mould inductance L4.
5. EMC power supply architectures according to claim 4, which is characterized in that further include being connected in parallel on common mode inductance L4 second
The differential mode capacitor C6 at grade end, and it is connected in parallel on the differential mode capacitor C9 at common mode inductance L5 second subprimes end.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820667806.XU CN208078896U (en) | 2018-05-04 | 2018-05-04 | A kind of EMC power supply architectures |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820667806.XU CN208078896U (en) | 2018-05-04 | 2018-05-04 | A kind of EMC power supply architectures |
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| CN208078896U true CN208078896U (en) | 2018-11-09 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109510455A (en) * | 2019-01-04 | 2019-03-22 | 武汉海达数云技术有限公司 | Power supply change-over device |
| CN113628833A (en) * | 2021-07-28 | 2021-11-09 | 宁国市裕华电器有限公司 | Common mode inductance, single-phase robot filter |
-
2018
- 2018-05-04 CN CN201820667806.XU patent/CN208078896U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109510455A (en) * | 2019-01-04 | 2019-03-22 | 武汉海达数云技术有限公司 | Power supply change-over device |
| CN113628833A (en) * | 2021-07-28 | 2021-11-09 | 宁国市裕华电器有限公司 | Common mode inductance, single-phase robot filter |
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