CN209860597U - Airborne lightning protection filter - Google Patents
Airborne lightning protection filter Download PDFInfo
- Publication number
- CN209860597U CN209860597U CN201920969683.XU CN201920969683U CN209860597U CN 209860597 U CN209860597 U CN 209860597U CN 201920969683 U CN201920969683 U CN 201920969683U CN 209860597 U CN209860597 U CN 209860597U
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- phase
- lightning protection
- filter circuit
- filter
- airborne
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/40—Arrangements for reducing harmonics
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- Emergency Protection Circuit Devices (AREA)
Abstract
The utility model relates to an airborne lightning protection filter, airborne lightning protection filter include lightning protection filter casing and set up three-phase filter circuit, the direct current filter circuit in the lightning protection filter casing, every looks of three-phase filter circuit's output all is through a first diode ground connection, direct current filter circuit's output is through second diode ground connection, install the diode additional through three-phase filter circuit and direct current filter circuit's rear end and carry out lightning protection, mainly restrain the conduction interference of 10kHz ~ 10MHz input power cord and DO-160G in A3L3J 3's lightning protection requirement, filter circuit and lightning protection intercombination, match the inhibitory effect between the two, reach the protection requirement of final equipment.
Description
Technical Field
The utility model relates to a lightning protection filtering field, concretely relates to airborne lightning protection filter.
Background
The input of the airborne equipment comprises three phases of 115V/400Hz and 28V direct current, and the two phases need to be filtered and protected against lightning, so that the conducted interference of the subsequent equipment is reduced, and the subsequent equipment is prevented from being damaged or not working normally due to lightning. Due to the fact that the filter assembly is used on airplane equipment, the filter assembly has high requirements on size, weight, environmental adaptability, sealing performance and the like.
How to solve the above problems is a need to be solved.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing an airborne lightning protection filter to the realization is integrated in a wave filter with three-phase electricity and direct current's filtering and lightning protection, with volume and the weight that reduces the wave filter.
In order to solve the technical problem, the utility model provides an airborne lightning protection filter, include:
the lightning protection filter comprises a lightning protection filter shell, and a three-phase filter circuit and a direct current filter circuit which are arranged in the lightning protection filter shell;
each phase of the output end of the three-phase filter circuit is grounded through a first diode;
and the output end of the direct current filter circuit is grounded through a second diode.
Furthermore, the lightning protection filter shell is made of aluminum.
Furthermore, the three-phase filter circuit comprises three differential mode inductors, a three-phase common mode inductor, six differential mode capacitors and three common mode capacitors;
three phases of a three-phase current input end of the airborne equipment are respectively output through the differential mode inductor and the three-phase common mode inductor;
the six differential mode inductors are arranged in groups of three, and one end of each differential mode inductor group is electrically connected with one another;
the other ends of the differential mode inductors are electrically connected between the input end of the three-phase current and each differential mode inductor, and the other ends of the differential mode inductors are electrically connected to each phase of the three-phase current between the output end of the three-phase current and the three-phase common mode inductor;
each common mode capacitor is electrically connected between the three differential mode inductors and the three-phase common mode inductor and then grounded.
Further, the three-phase filter circuit further comprises three bleeder resistors;
and one ends of the three bleeder resistors are mutually electrically connected, and the other ends of the three bleeder resistors are electrically connected between the input end of the three-phase current and each differential mode inductor.
Further, the direct current filter circuit comprises a single-phase common mode inductor, two differential mode capacitors and two common mode capacitors;
the direct current input end of the airborne equipment passes through the single-phase common mode inductor and then is output;
the two differential mode capacitors are respectively and electrically connected between positive and negative power lines on two sides of the single-phase common mode inductor;
one end of each of the two common mode capacitors is electrically connected to the positive and negative power lines between the single-phase common mode inductor and the output end of the direct current filter circuit, and the other end of each of the two common mode capacitors is grounded.
The beneficial effects of the utility model are that, the utility model provides an airborne lightning protection filter, airborne lightning protection filter include lightning protection filter casing and set up three-phase filter circuit, the direct current filter circuit in the lightning protection filter casing, every looks of three-phase filter circuit's output all is through a first diode ground connection, direct current filter circuit's output passes through second diode ground connection, the rear end through three-phase filter circuit and direct current filter circuit installs the diode additional and carries out the lightning protection, mainly restraines the conduction interference of 10kHz ~ 10MHz input power cord and DO-160G in A3L3J 3's lightning protection requirement, filter circuit and lightning protection intercombination, match the suppression effect between the two, reach the protection requirement of final equipment.
Drawings
The present invention will be further explained with reference to the drawings and examples.
Fig. 1 is a circuit diagram of an airborne lightning protection filter.
Detailed Description
The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic drawings and illustrate the basic structure of the present invention only in a schematic manner, and thus show only the components related to the present invention.
Example 1
As shown in fig. 1, in the embodiment 1, an airborne lightning protection filter is provided, the airborne lightning protection filter includes a lightning protection filter housing, and a three-phase filter circuit and a dc filter circuit which are disposed in the lightning protection filter housing, each phase of an output end of the three-phase filter circuit is grounded through a first diode, an output end of the dc filter circuit is grounded through a second diode, and diodes are additionally mounted at rear ends of the three-phase filter circuit and the dc filter circuit to perform lightning protection, so that conduction interference of a 10kHz ~ 10MHz input power line and lightning protection requirements of A3L3J3 in DO-160G are mainly suppressed, and the filter circuit and the lightning protection are combined with each other to match suppression effects between the two, and protection requirements of final equipment are met.
In this embodiment, the lightning protection filter housing is made of an aluminum material. The airborne lightning protection filtering component shell is made of an aluminum shell material, and chemical nickel plating and three-proofing treatment are carried out on the surface of the airborne lightning protection filtering component shell, so that the airborne lightning protection filtering component can adapt to severe environments such as salt spray, mould and damp and hot. The lightning protection filter shell is completely shielded, and is machined by a milling machine from a whole piece of aluminum, so that the electromagnetic interference caused by gap leakage is reduced, and the structural strength of the lightning protection filter shell is ensured.
In this embodiment, the three-phase filter circuit includes three differential mode inductors, one three-phase common mode inductor, six differential mode capacitors, and three common mode capacitors; three phases of a three-phase current input end of the airborne equipment are respectively output through the differential mode inductor and the three-phase common mode inductor; the six differential mode inductors are arranged in groups of three, and one end of each differential mode inductor group is electrically connected with one another; the other ends of the differential mode inductors are electrically connected between the input end of the three-phase current and each differential mode inductor, and the other ends of the differential mode inductors are electrically connected to each phase of the three-phase current between the output end of the three-phase current and the three-phase common mode inductor; each common mode capacitor is electrically connected between the three differential mode inductors and the three-phase common mode inductor and then grounded. By using a more optimized circuit structure, the conductive interference of a rear PFC circuit can be effectively solved, and the volume and the weight can be effectively reduced.
In this embodiment, the three-phase filter circuit further includes three bleeder resistors; and one ends of the three bleeder resistors are mutually electrically connected, and the other ends of the three bleeder resistors are electrically connected between the input end of the three-phase current and each differential mode inductor.
In this embodiment, the dc filter circuit includes a single-phase common-mode inductor, two differential-mode capacitors, and two common-mode capacitors; the direct current input end of the airborne equipment passes through the single-phase common mode inductor and then is output; the two differential mode capacitors are respectively and electrically connected between positive and negative power lines on two sides of the single-phase common mode inductor; one end of each of the two common mode capacitors is electrically connected to the positive and negative power lines between the single-phase common mode inductor and the output end of the direct current filter circuit, and the other end of each of the two common mode capacitors is grounded.
In this embodiment, the three-phase current input end and the direct current input end of the airborne lightning protection filter use sealed aviation connectors, the output end is led out by using a soft lead, a polytetrafluoroethylene insulating gasket is adopted, and sealing treatment is performed through 704 silica gel, so that the tightness of the airborne lightning protection filter is ensured.
In summary, the utility model provides an airborne lightning protection filter, airborne lightning protection filter include lightning protection filter casing and set up three-phase filter circuit, the direct current filter circuit in the lightning protection filter casing, every looks of three-phase filter circuit's output all is through a first diode ground connection, direct current filter circuit's output is through second diode ground connection, install the diode additional through three-phase filter circuit and direct current filter circuit's rear end and carry out the lightning protection, mainly restrain the conduction interference of 10kHz ~ 10MHz input power cord and DO-160G in the lightning protection requirement of A3L3J3, filter circuit and lightning protection intercombination, match the inhibitory effect between the two, reach the protection requirement of final equipment.
In light of the foregoing, it will be apparent to those skilled in the art from this disclosure that various changes and modifications can be made without departing from the spirit and scope of the invention. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.
Claims (5)
1. An airborne lightning protection filter, comprising:
the lightning protection filter comprises a lightning protection filter shell, and a three-phase filter circuit and a direct current filter circuit which are arranged in the lightning protection filter shell;
each phase of the output end of the three-phase filter circuit is grounded through a first diode;
and the output end of the direct current filter circuit is grounded through a second diode.
2. The airborne lightning protection filter of claim 1,
the lightning protection filter shell is made of aluminum materials.
3. The airborne lightning protection filter of claim 1,
the three-phase filter circuit comprises three differential mode inductors, a three-phase common mode inductor, six differential mode capacitors and three common mode capacitors;
three phases of a three-phase current input end of the airborne equipment are respectively output through the differential mode inductor and the three-phase common mode inductor;
the six differential mode inductors are arranged in groups of three, and one end of each differential mode inductor group is electrically connected with one another;
the other ends of the differential mode inductors are electrically connected between the input end of the three-phase current and each differential mode inductor, and the other ends of the differential mode inductors are electrically connected to each phase of the three-phase current between the output end of the three-phase current and the three-phase common mode inductor;
each common mode capacitor is electrically connected between the three differential mode inductors and the three-phase common mode inductor and then grounded.
4. The airborne lightning protection filter of claim 3,
the three-phase filter circuit also comprises three bleeder resistors;
and one ends of the three bleeder resistors are mutually electrically connected, and the other ends of the three bleeder resistors are electrically connected between the input end of the three-phase current and each differential mode inductor.
5. The airborne lightning protection filter of claim 1,
the direct current filter circuit comprises a single-phase common-mode inductor, two differential-mode capacitors and two common-mode capacitors;
the direct current input end of the airborne equipment passes through the single-phase common mode inductor and then is output;
the two differential mode capacitors are respectively and electrically connected between positive and negative power lines on two sides of the single-phase common mode inductor;
one end of each of the two common mode capacitors is electrically connected to the positive and negative power lines between the single-phase common mode inductor and the output end of the direct current filter circuit, and the other end of each of the two common mode capacitors is grounded.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920969683.XU CN209860597U (en) | 2019-06-26 | 2019-06-26 | Airborne lightning protection filter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920969683.XU CN209860597U (en) | 2019-06-26 | 2019-06-26 | Airborne lightning protection filter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209860597U true CN209860597U (en) | 2019-12-27 |
Family
ID=68942568
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920969683.XU Expired - Fee Related CN209860597U (en) | 2019-06-26 | 2019-06-26 | Airborne lightning protection filter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209860597U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113691120A (en) * | 2021-07-16 | 2021-11-23 | 北京无线电测量研究所 | Power filter for PWM power amplifying circuit |
-
2019
- 2019-06-26 CN CN201920969683.XU patent/CN209860597U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113691120A (en) * | 2021-07-16 | 2021-11-23 | 北京无线电测量研究所 | Power filter for PWM power amplifying circuit |
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| Date | Code | Title | Description |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20191227 Termination date: 20210626 |
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| CF01 | Termination of patent right due to non-payment of annual fee |