CN220775647U - Aviation EMC filter - Google Patents
Aviation EMC filter Download PDFInfo
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- CN220775647U CN220775647U CN202322499665.9U CN202322499665U CN220775647U CN 220775647 U CN220775647 U CN 220775647U CN 202322499665 U CN202322499665 U CN 202322499665U CN 220775647 U CN220775647 U CN 220775647U
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- direct current
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- 238000004891 communication Methods 0.000 claims abstract description 26
- 230000001629 suppression Effects 0.000 claims abstract description 8
- 238000006243 chemical reaction Methods 0.000 claims abstract description 6
- 238000001914 filtration Methods 0.000 claims description 9
- WJZHMLNIAZSFDO-UHFFFAOYSA-N manganese zinc Chemical compound [Mn].[Zn] WJZHMLNIAZSFDO-UHFFFAOYSA-N 0.000 claims description 8
- 238000003801 milling Methods 0.000 claims description 4
- 238000005192 partition Methods 0.000 claims description 3
- 230000035699 permeability Effects 0.000 claims description 3
- 238000000034 method Methods 0.000 claims 1
- 230000009286 beneficial effect Effects 0.000 abstract description 3
- 230000007774 longterm Effects 0.000 abstract description 2
- 230000005764 inhibitory process Effects 0.000 abstract 1
- 230000009466 transformation Effects 0.000 description 5
- 239000011701 zinc Substances 0.000 description 3
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 229910002796 Si–Al Inorganic materials 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 239000011324 bead Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000010892 electric spark Methods 0.000 description 1
- 230000002401 inhibitory effect Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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- Emergency Protection Circuit Devices (AREA)
Abstract
The utility model discloses an aviation EMC filter, which comprises a filter shell connected with a conversion power supply; the inner cavity of the filter shell is respectively provided with a low-voltage auxiliary direct current power supply, a high-frequency three-phase alternating current power supply, a communication module and 13 paths of low-voltage direct current power supplies, wherein the low-voltage auxiliary direct current power supply, the high-frequency three-phase alternating current power supply and the communication module are all internally provided with lightning protection devices, and the low-voltage auxiliary direct current power supply is also internally provided with an impact current suppression circuit; the utility model can separate and shield the internal components of the EMC filter, reduce the internal crosstalk of the EMC filter to the maximum extent, filter the high-frequency interference and the low-frequency interference in the EMC filter, improve the integral lightning protection capability of the EMC filter, and simultaneously the EMC filter has the impact circuit inhibition capability, thereby being beneficial to the long-term use of the aviation EMC filter.
Description
Technical Field
The utility model relates to the field of filters, in particular to an EMC filter suitable for mixing 2.5kHz high-frequency three-phase alternating current, 13 paths of low-voltage direct current and communication signals of aviation equipment, and particularly relates to an aviation EMC filter.
Background
The EMC filter, which is also called as an electromagnetic compatibility filter, is mainly used in instruments and meters and an automatic control system, is used for inhibiting and eliminating strong electromagnetic interference and electric spark interference on the site of an industrial automatic system, and is used for surveying on-site instruments and meters, so that the safe and reliable operation of the automatic control system is ensured, and the EMC filter can be applied to an aviation transformation power supply.
The aviation transformation power supply is required to pass electromagnetic compatibility and power characteristic test, and a plurality of interference influence other products exist in the transformation power supply, and a plurality of interference influence transformation power supplies exist in other products, so that the products are easily influenced by lightning, and therefore, an aviation EMC filter is provided for ensuring that the transformation power supply and other products work normally.
Disclosure of Invention
The utility model aims to provide an aviation EMC filter for solving the problem that a plurality of interferences exist inside a conversion power supply and influence other products in the prior art.
In order to achieve the above purpose, the present utility model provides the following technical solutions: an aviation EMC filter comprises a filter shell connected with a conversion power supply; the inner cavity of the filter shell is respectively provided with a low-voltage auxiliary direct current power supply, a high-frequency three-phase alternating current power supply, a communication module and 13 low-voltage direct current power supplies, and partition plates are arranged between the low-voltage auxiliary direct current power supply and the high-frequency three-phase alternating current power supply, between the high-frequency three-phase alternating current power supply and the communication module and between the communication module and the 13 low-voltage direct current power supplies;
the low-voltage auxiliary direct current power supply, the high-frequency three-phase alternating current power supply, the communication module and the 13 paths of low-voltage direct current power supplies are all internally provided with filter circuits, lightning protection devices are arranged in the low-voltage auxiliary direct current power supply, the high-frequency three-phase alternating current power supply and the communication module, and the low-voltage auxiliary direct current power supply is also internally provided with an impact current suppression circuit; the filter circuit consists of a common mode inductance, a differential mode capacitance and a common mode capacitance.
Preferably, the filtering circuit of the low-voltage auxiliary direct current power supply adopts a tripolar filtering circuit, and the common-mode inductance magnetic ring in the filtering circuit adopts a manganese-zinc magnetic ring or a ferrum-silicon-aluminum magnetic ring.
Preferably, the filtering circuits of the high-frequency three-phase alternating current power supply and the communication module are primary filtering circuits, and a common-mode inductance magnetic ring in the filtering circuits adopts a manganese-zinc magnetic ring.
Preferably, the common-mode inductance magnetic ring adopts a Mn-Zn magnetic ring with initial magnetic conductivity of 10000 mu 0 。
Preferably, the filter housing is manufactured by an integral milling method.
The beneficial effects of the utility model are as follows:
the utility model utilizes the division plate to separate and shield the internal components of the EMC filter, reduces the internal crosstalk of the EMC filter to the greatest extent, filters the high-frequency interference and the low-frequency interference in the EMC filter, can improve the integral lightning protection capacity of the EMC filter under the action of the lightning protection device, and simultaneously sets the impact current suppression circuit, so that the EMC filter has the impact circuit suppression capacity, thereby being beneficial to the long-term use of the aviation EMC filter.
Drawings
FIG. 1 is a top view of the overall internal structure of an aeronautical EMC filter of the present utility model;
fig. 2 is a schematic block diagram of the structure of the aviation EMC filter of the utility model.
In the figure: the lightning protection device comprises a filter shell 1, a partition plate 11, a low-voltage auxiliary direct current power supply 2, a lightning protection device 201, a surge current suppression circuit 202, a filter circuit 203, a high-frequency three-phase alternating current power supply 3, a communication module 4, a low-voltage direct current power supply 5-13 paths and a conversion power supply 6.
Detailed Description
The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
Referring to fig. 1-2, a technical solution is provided for the present utility model, an aviation EMC filter, which includes a filter housing 1 connected to a conversion power supply 6; the filter shell 1 is manufactured by adopting an integral milling mode, and the integral milling mode can improve the integral shielding performance of the filter shell 1; the inner cavity of the filter housing 1 is respectively provided with a low-voltage auxiliary direct current power supply 2, a high-frequency three-phase alternating current power supply 3, a communication module 4 and 13 paths of low-voltage direct current power supplies 5, separation plates 11 are arranged between the low-voltage auxiliary direct current power supply 2 and the high-frequency three-phase alternating current power supply 3, between the high-frequency three-phase alternating current power supply 3 and the communication module 4 and between the communication module 4 and 13 paths of low-voltage direct current power supplies 5, the inner cavity of the filter housing 1 is provided with independent cavities by utilizing the separation plates 11, the inner cavity of the filter housing 1 is of a cavity separating structure, signals sent by the high-frequency three-phase alternating current power supplies 3 and 13 paths of low-voltage direct current power supplies 5, the low-voltage auxiliary direct current power supplies 2 and the communication module 4 are separated and shielded, and internal crosstalk of an EMC filter is reduced to the maximum extent.
The low-voltage auxiliary direct current power supply 2, the high-frequency three-phase alternating current power supply 3, the communication module 4 and the 13 paths of low-voltage direct current power supply 5 are all internally provided with a filter circuit 203, the low-voltage auxiliary direct current power supply 2, the high-frequency three-phase alternating current power supply 3 and the communication module 4 are all internally provided with a lightning protection device 201, and the low-voltage auxiliary direct current power supply 2 is also internally provided with an impact current suppression circuit 202; the filter circuit 203 is composed of a common mode inductance, a differential mode capacitance and a common mode capacitance; by using the lightning protection device 201, the lightning protection capability of the EMC filter as a whole can be improved.
In this embodiment, the filter circuit 203 of the low-voltage auxiliary dc power supply 2 adopts a tripolar filter circuit, and the common-mode inductance magnetic ring in the filter circuit 203 adopts a manganese-zinc magnetic ring or a ferro-silicon-aluminum magnetic ring; wherein, the filter circuits 203 of the high-frequency three-phase alternating current power supply 3 and the communication module 4 are both primary filter circuits, the common-mode inductance magnetic ring in the filter circuits 203 adopts a manganese-zinc magnetic ring, and the initial permeability of the manganese-zinc magnetic ring adopted by the common-mode inductance magnetic ring is 10000 mu 0 。
In order to meet the requirements of volume and weight, the high-frequency three-phase alternating current power supply 3 adopts a 1-level filter circuit, and the common-mode inductance magnetic ring adopts an initial magnetic conductivity of 10000 mu 0 The leakage inductance of the Mn-Zn magnetic ring is used as a differential mode inductance, so that low-frequency interference can be effectively filtered; wherein, the low-voltage auxiliary direct current power supply 2 adopts a three-stage filter circuit, and the common-mode inductance magnetic ring has initial magnetic conductivity of 10000 mu 0 The leakage inductance of the Mn-Zn magnetic ring and the Fe-Si-Al magnetic ring with the initial magnetic permeability of 125 is used as a differential mode inductance, so that the full-frequency interference can be effectively realized; the inrush current suppression circuit 202 is used to suppress the inrush current.
The signals generated by the communication module 4 adopt magnetic beads and a primary filter circuit, so that high-frequency interference is effectively filtered, and meanwhile, normal operation of the communication signals is not affected.
The technical features of the above embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.
The foregoing examples only represent preferred embodiments of the present utility model, which are described in more detail and are not to be construed as limiting the scope of the utility model; it should be noted that, for those skilled in the art, it is possible to make several variations and modifications without departing from the concept of the present utility model, which fall within the protection scope of the present utility model; in the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; may be a mechanical connection; can be directly connected or indirectly connected through an intermediate medium, and can be the communication between the two elements or the interaction relationship between the two elements; the detachable mounting mode is various, for example, the detachable mounting mode can be matched with the buckle through plugging, for example, the detachable mounting mode can be realized through a bolt connection mode, and the like.
Although embodiments of the present utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.
Claims (5)
1. An aviation EMC filter comprises a filter shell connected with a conversion power supply; the method is characterized in that: the inner cavity of the filter shell is respectively provided with a low-voltage auxiliary direct current power supply, a high-frequency three-phase alternating current power supply, a communication module and 13 low-voltage direct current power supplies, and partition plates are arranged between the low-voltage auxiliary direct current power supply and the high-frequency three-phase alternating current power supply, between the high-frequency three-phase alternating current power supply and the communication module and between the communication module and the 13 low-voltage direct current power supplies;
the low-voltage auxiliary direct current power supply, the high-frequency three-phase alternating current power supply, the communication module and the 13 paths of low-voltage direct current power supplies are all internally provided with filter circuits, lightning protection devices are arranged in the low-voltage auxiliary direct current power supply, the high-frequency three-phase alternating current power supply and the communication module, and the low-voltage auxiliary direct current power supply is also internally provided with an impact current suppression circuit; the filter circuit consists of a common mode inductance, a differential mode capacitance and a common mode capacitance.
2. An aviation EMC filter according to claim 1, characterized in that: the filtering circuit of the low-voltage auxiliary direct current power supply adopts a tripolar filtering circuit, and a common-mode inductance magnetic ring in the filtering circuit adopts a manganese-zinc magnetic ring or a ferrum-silicon-aluminum magnetic ring.
3. An aviation EMC filter according to claim 1, characterized in that: the high-frequency three-phase alternating current power supply and the filter circuit of the communication module are primary filter circuits, and a common-mode inductance magnetic ring in the filter circuit adopts a manganese-zinc magnetic ring.
4. An aviation EMC filter according to claim 2 or 3, characterized in that: manganese-zinc magnetic ring adopted by common-mode inductance magnetic ringInitial permeability of 10000 mu 0 。
5. An aviation EMC filter according to claim 1, characterized in that: the filter shell is manufactured in an integral milling mode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322499665.9U CN220775647U (en) | 2023-09-14 | 2023-09-14 | Aviation EMC filter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322499665.9U CN220775647U (en) | 2023-09-14 | 2023-09-14 | Aviation EMC filter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220775647U true CN220775647U (en) | 2024-04-12 |
Family
ID=90614827
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322499665.9U Active CN220775647U (en) | 2023-09-14 | 2023-09-14 | Aviation EMC filter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220775647U (en) |
-
2023
- 2023-09-14 CN CN202322499665.9U patent/CN220775647U/en active Active
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