CN207766735U - A kind of EMC filters isolated from power chamber - Google Patents
A kind of EMC filters isolated from power chamber Download PDFInfo
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- CN207766735U CN207766735U CN201721423968.0U CN201721423968U CN207766735U CN 207766735 U CN207766735 U CN 207766735U CN 201721423968 U CN201721423968 U CN 201721423968U CN 207766735 U CN207766735 U CN 207766735U
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- power
- isolated
- chamber
- metallic walls
- power chamber
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Abstract
The utility model discloses a kind of EMC filters isolated from power chambers, a L-type metallic walls are arranged in the corner of the host chamber of EMC filters, L-type metallic walls and the two neighboring metal sidewall of host chamber surround a closed isolated from power chamber；The side metallic walls that isolated from power chamber and host chamber are used in conjunction with are equipped with the power connection through cavity wall, a side wall of the L-type metallic walls of isolated from power chamber be equipped with power supply source line by cord channel；Feedthrough capacitor is installed in cord channel；Isolated from power intracavitary is equipped with filter, and the input terminal of filter connects power connection, and the output end of filter is connected with the input terminal of feedthrough capacitor, and the output end of feedthrough capacitor connects the power connector of host intracavitary by power cord.The system power supply input/output terminal of the utility model is completely isolated by isolated from power chamber, eliminates the adverse effect that high-frequency coupling tests EMC, solves the problems, such as powered electromagnetic interference, improves the reliability of system.
Description
Technical field
A kind of EMC filters isolated from power chamber.
Background technology
Currently, as national military horizontal is gradually increased, the volume of all kinds of military equipments is also increasingly required small-sized
Change.Most domestic equipment is often taken at present adds all kinds of filters to ensure that installation electromagnetical is simultaneous in system DC/DC modules front end
Hold experiment to pass through.Equipment inner space anxiety is thus caused, causes equipment performance that cannot maximally utilize.
It need to pass through the requirement of 7, ground force ground EMC especially RE102 test items, external power supply adaptation for military equipment
The electromagnetic interference and equipment internal electric source part, especially DC-DC power module working frequency and theirs is humorous that device introduces
The baptism to complete machine RE102 test items that wave component is brought proposes very high requirement to equipment by EMC tests, right
The design of the design especially shielding construction of machine system is even more a huge challenge.
Routine engineering design practice in, engineer often by solutions of this problem place on high quality, high reliability outside
The dedicated power supply adaptor connect, and corresponding EMC requirement proposed to this power supply adaptor, the certainly equipment thus brought at
This is increased substantially, and further, adverse conditions is that new national military standard emc testing is distinctly claimed the electricity of equipment
Source input cable cannot have the presence of shielded layer；On the other hand, often all requirements are very high for military equipment, design of electronic circuits
Engineer be difficult made for EMC test items in mainboard power supply part or equipment power module component it is profession, effective
Electromagnetic Compatibility Design, in other words, even if there is certain electromagnetic Compatibility Design, it is also difficult to there is ideal effect.
Utility model content
The purpose of the utility model is to overcome the deficiencies in the prior art, provide a kind of in host intracavitary one independence of increase
Isolated from power chamber, power supply inputted by power connection after enter isolated from power chamber in is filtered, system power supply input and output
End is completely isolated by isolated from power chamber, eliminates EMC filter isolated from power of the high-frequency coupling to the EMC adverse effects tested
Chamber.
The purpose of this utility model is achieved through the following technical solutions：A kind of EMC filters isolated from power chamber,
A L-type metallic walls, the two neighboring metal side of L-type metallic walls and host chamber is arranged in the corner of the host chamber of EMC filters
Wall surrounds a closed isolated from power chamber；The side metallic walls that the isolated from power chamber is used in conjunction with host chamber are equipped with and pass through
The power connection of transluminal wall, a side wall of the L-type metallic walls of isolated from power chamber be equipped with power supply source line by power cord it is logical
Road；Feedthrough capacitor is installed in the cord channel；
Isolated from power intracavitary is equipped with filter, and the input terminal of filter connects power connection, the output end of filter with
The input terminal of feedthrough capacitor is connected, and the output end of feedthrough capacitor connects the power connector of host intracavitary by power cord.
Further, the electricity feedthrough capacitor is mounted in the metallic walls of isolated from power chamber, input terminal and output
End is located inside and outside metallic walls.Conductive gasket is equipped between the feedthrough capacitor and metallic walls.
Further, complete conductive adhesive tape mounting groove is equipped at the mating connection of the isolated from power chamber and upper cover.
Further, the cord channel opening is equipped with sealing element.
The utility model has the beneficial effects that：
1, the utility model increases an independent isolated from power chamber in host intracavitary, after power supply is inputted by power connection
Into being filtered in isolated from power chamber, system power supply input/output terminal is completely isolated by isolated from power chamber, eliminates high frequency coupling
Close the adverse effect tested EMC；It solves the problems, such as powered electromagnetic interference from complete machine structure design aspect, improves system
Reliability reduces the requirement to external power adapter so that equipment cost is greatly reduced；Also electron design engineer is pre-
More design spaces are stayed, design difficulty of the hardware design in terms of EMC is reduced；
2, filter can be selected or customized according to the requirement of system voltage, electric current and structure size, it is ensured that test
Pass through；
3, separate cavities and host chamber power input channel are connected feedthrough capacitor respectively, and feedthrough capacitor is directly installed on metal covering
On plate, when complete machine closing lid, it can be ensured that feedthrough capacitor ground terminal is reliably connected with casing；And feedthrough capacitor grounded inductor smaller,
Almost without the influence of lead-in inductance, filter effect is more preferable.
Description of the drawings
Fig. 1 is the EMC filter isolated from power cavity configuration figures of the utility model；
Reference sign：1- host chambers, 2- isolated from power chambers, 3- power connections, 4- filters, 5- cord channels,
6- conductive adhesive tape mounting grooves, 7- sealing elements.
Specific implementation mode
The technical solution of the utility model is further illustrated below in conjunction with the accompanying drawings.
As shown in Figure 1, a kind of EMC filters isolated from power chamber, in the corner setting one of the host chamber 1 of EMC filters
A L-type metallic walls, L-type metallic walls and the two neighboring metal sidewall of host chamber 1 surround a closed isolated from power chamber 2；Institute
It states isolated from power chamber 2 and is equipped with the power connection 3 for running through cavity wall, isolated from power with the side metallic walls that host chamber 1 is used in conjunction with
One side wall of the L-type metallic walls of chamber 2 be equipped with power supply source line by cord channel 5；Peace in the cord channel 5
Equipped with feedthrough capacitor；
Filter 4 is installed, the input terminal of filter connects power connection 3, the output of filter 4 in isolated from power chamber 2
End is connected with the input terminal of feedthrough capacitor, and the output end of feedthrough capacitor connects the power connector in host chamber 1 by power cord.
Further, the electricity feedthrough capacitor is mounted in the metallic walls of isolated from power chamber 2, therefore its ground connection electricity
Smaller is felt, almost without the influence of lead-in inductance；Its input terminal and output end are located inside and outside metallic walls.It defeated
Enter output end by metallic walls to be isolated, eliminates high-frequency coupling.It further, can be according to the outer of feedthrough capacitor in structure design
The size of diameter size design cord channel when assembly, increases conductive gasket, by it between feedthrough capacitor and cord channel
Between it is hard contact become flexible contact.When complete machine closing lid is locked, it can be ensured that feedthrough capacitor ground terminal and isolated from power chamber 2
It is reliably connected between metallic walls, then the feedthrough capacitor in this Standard has the filter effect close to ideal capacitance, effectively
Inhibit electromagnetic leakage, offer reliable guarantee is passed through to the EMC tests of complete machine.
Further, complete conductive adhesive tape mounting groove 6 is equipped at the mating connection of the isolated from power chamber 2 and upper cover,
The effectiveness that isolated from power chamber 2 can be enhanced, prevents electromagnetic exposure.
Further, 5 opening of the cord channel be equipped with sealing element 7, by sealing element 7 by cord channel 5 into
Row sealing, can keep effective leakproofness of isolated from power chamber 2.
Those of ordinary skill in the art will understand that the embodiments described herein, which is to help reader, understands this reality
With novel principle, it should be understood that the scope of the present invention is not limited to such specific embodiments and embodiments.
Those skilled in the art can make according to the technical disclosures disclosed by the utility model various does not depart from this practicality
Novel substantive various other specific variations and combinations, these variations and combinations are still within the protection scope of the present invention.
Claims (5)
1. a kind of EMC filters isolated from power chamber, which is characterized in that in the corner setting one of the host chamber (1) of EMC filters
A L-type metallic walls, L-type metallic walls and the two neighboring metal sidewall of host chamber (1) surround a closed isolated from power chamber
(2)；The isolated from power chamber (2) is equipped with the power connection through cavity wall with the side metallic walls that host chamber (1) is used in conjunction with
(3), a side wall of the L-type metallic walls of isolated from power chamber (2) be equipped with power supply source line by cord channel (5)；It is described
Feedthrough capacitor is installed in cord channel (5)；
Filter (4) is installed, the input terminal of filter connects power connection (3), filter (4) in isolated from power chamber (2)
Output end is connected with the input terminal of feedthrough capacitor, and the output end of feedthrough capacitor connects the power supply in host chamber (1) by power cord
Connector.
2. a kind of EMC filters isolated from power chamber according to claim 1, which is characterized in that the electricity punching electricity
Hold in the metallic walls of isolated from power chamber (2), input terminal and output end are located inside and outside metallic walls.
3. a kind of EMC filters isolated from power chamber according to claim 2, which is characterized in that the feedthrough capacitor and gold
It is equipped with conductive gasket between category wall.
4. a kind of EMC filters isolated from power chamber according to claim 1, which is characterized in that the isolated from power chamber (2)
With at the mating connection of upper cover be equipped with complete conductive adhesive tape mounting groove (6).
5. a kind of EMC filters isolated from power chamber according to claim 1, which is characterized in that the cord channel (5)
Opening is equipped with sealing element (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721423968.0U CN207766735U (en) | 2017-10-31 | 2017-10-31 | A kind of EMC filters isolated from power chamber |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721423968.0U CN207766735U (en) | 2017-10-31 | 2017-10-31 | A kind of EMC filters isolated from power chamber |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207766735U true CN207766735U (en) | 2018-08-24 |
Family
ID=63179634
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721423968.0U Active CN207766735U (en) | 2017-10-31 | 2017-10-31 | A kind of EMC filters isolated from power chamber |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207766735U (en) |
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2017
- 2017-10-31 CN CN201721423968.0U patent/CN207766735U/en active Active
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