CN214754509U

CN214754509U - Thunder and lightning pulse protection power supply filtering connector

Info

Publication number: CN214754509U
Application number: CN202120817951.3U
Authority: CN
Inventors: 王彦; 孟繁旭
Original assignee: AVIC Shenyang Xinghua Aero Electrical Appliance Co Ltd
Current assignee: AVIC Shenyang Xinghua Aero Electrical Appliance Co Ltd
Priority date: 2021-04-21
Filing date: 2021-04-21
Publication date: 2021-11-16
Anticipated expiration: 2031-04-21

Abstract

The utility model relates to a connector technical field, a lightning pulse protection power filter connector, including filtering socket, ceramic capacitor, common mode inductance and metal protecting crust, filtering socket afterbody is fixed with the circuit board, the welding has transient state suppression diode on the circuit board, filtering socket passes through the wire and is connected with ceramic capacitor, common mode inductance and constitutes filter circuit, filtering socket's afterbody, ceramic capacitor and common mode inductance are sealed in the protecting crust, be provided with the casting glue in the metal protecting crust, metal protecting crust afterbody has the through-hole, the wire extends to metal protecting crust outside through the through-hole, and the parcel has the wave prevention cover on the outer wire of metal protecting crust. The utility model has the advantages of lightning impulse protection and the like.

Description

Thunder and lightning pulse protection power supply filtering connector

Technical Field

The utility model relates to a connector technical field, concretely relates to thunder and lightning pulse protection power filter connector.

Background

Along with the increasing complexity of the modern avionic equipment, the functions of the avionic equipment are gradually improved, and on the other hand, the miniaturization, high integration, high speed and high frequency design of electronic products lead the performance requirements of the system on electromagnetic compatibility to be improved continuously. At present, in the design of avionic system, electromagnetic compatibility design, reliability design, environmental adaptability design, safety design and the like are juxtaposed to form an important component of system design. In order to meet the electromagnetic compatibility requirement of the system on equipment, the selection of a power supply filter is a necessary measure. Meanwhile, the aircraft has strict requirements on the weight of airborne equipment, and if the traditional linear power filter is not installed properly, the filtering effect is greatly reduced, and even the electromagnetic compatibility check cannot be passed. The precise electronic equipment has extremely low capability of resisting overvoltage, overcurrent and electromagnetic pulse, and once a precautionary system suffers from transient phenomena such as load switching, thunder, static electricity release, electromagnetic pulse and the like, the equipment can suffer from serious innovation. The problem of the influence of lightning on transient phenomena of equipment is more and more important. Therefore, a lightning impulse protection power supply filter connector is urgently needed.

SUMMERY OF THE UTILITY MODEL

In order to solve the problem, the utility model provides a lightning pulse protection power filter connector, it has advantages such as lightning pulse protection.

In order to achieve the above object, the utility model adopts the following technical scheme: the utility model provides a thunder and lightning pulse protection power filter connector, includes filtering socket, ceramic capacitor, common mode inductance and metal protecting crust, the filtering socket afterbody is fixed with the circuit board, the welding has transient suppression diode on the circuit board, the filtering socket passes through the wire and is connected with ceramic capacitor, common mode inductance and constitutes filter circuit, afterbody, ceramic capacitor and the common mode inductance of filtering socket are sealed in the protecting crust, be provided with the casting glue in the metal protecting crust, the metal protecting crust afterbody has the through-hole, the wire warp the through-hole and extends to the metal protecting crust outside, and the parcel has the wave prevention cover on the outer wire of metal protecting crust.

Preferably, the metal protective shell comprises a frame, a front mounting plate and a rear mounting plate, and the front mounting plate and the rear mounting plate are fixedly connected with the frame through screws and nuts.

Preferably, the outer surface of the front mounting plate is covered with a conductive rubber pad.

Preferably, the wire is a polytetrafluoroethylene wire.

Preferably, the number of the ceramic capacitors is two.

Use the utility model discloses a beneficial effect is: the lightning impulse protection function is realized through the transient suppression diode, and the metal protective shell is used, so that the utility model has good conductive contact with the installation and use and small grounding resistance; the filter socket, the common-mode inductor and the ceramic capacitor are connected together through a lead to form a differential-mode filter circuit and a common-mode filter circuit, and pouring sealant is arranged in the metal protective shell and is filled and sealed to ensure the integral air tightness requirement of the product.

Drawings

Fig. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic view of the assembly of the filter jack with ceramic capacitors, common mode cables and wires;

FIG. 3 is a schematic circuit diagram of the present invention;

the reference numerals include:

1-filtering socket, 11-transient suppression diode, 2-ceramic capacitor, 3-common mode inductor, 4-metal protective shell, 5-lead, 6-wave-proof sleeve and 7-conductive rubber pad.

Detailed Description

The present invention will be described in detail with reference to the accompanying drawings.

As shown in fig. 1-2, a lightning pulse protection power filter connector comprises a filter socket 1, a ceramic capacitor 2, a common mode inductor 3 and a metal protective shell 4, wherein a circuit board is fixed at the tail of the filter socket 1, a transient suppression diode 11 is welded on the circuit board, the lightning pulse protection function is realized through the transient suppression diode 11, the filter socket 1 is connected with the ceramic capacitor 2 and the common mode inductor 3 through a wire 5 to form a filter circuit, the tail of the filter socket 1, the ceramic capacitor 2 and the common mode inductor 3 are sealed in the protective shell, a potting adhesive is arranged in the metal protective shell 4 and used for ensuring the integral air tightness requirement of a product, the tail of the metal protective shell 4 is provided with a through hole, the wire 5 extends to the outside of the metal protective shell 4 through the through hole, and a wave-proof sleeve 6 is wrapped on the wire 5 outside the metal protective shell 4, the filter socket 1 is internally provided with a multilayer ceramic capacitor plate which is a common-mode capacitor in the filter circuit, the capacitor is equal to a feedthrough capacitor, is similar to an ideal capacitor below 1GHz, has a good high-frequency filtering effect, the filter socket 1, the common-mode inductor 3 and the ceramic capacitor 2 are welded together through a lead to form a differential-mode filter circuit and a common-mode filter circuit, and the common-mode inductor 3 is used for leakage inductance and the ceramic capacitor 2 to realize a pi-type differential-mode filter circuit.

The metal protection shell 4 comprises a frame, a front mounting plate and a rear mounting plate, wherein the front mounting plate and the rear mounting plate are fixedly connected with the frame through screws and nuts. The filtering socket 1 effectively combines a frame, a front mounting plate and a rear mounting plate which are formed by a screw and a metal machine to ensure the overall shielding performance of the product. The metal protective shell 4 is directly installed with a metal case panel of target installation equipment, has good conductive contact and small grounding resistance.

And the outer surface of the front mounting plate is also covered with a conductive rubber pad 7.

The lead 5 is a polytetrafluoroethylene lead.

The number of the ceramic capacitors 2 is two.

In fig. 3, differential mode capacitors CX1 and CX2 are implemented by a ceramic capacitor 2, differential mode inductors LD1 and LD2 are implemented by leakage inductance of a common mode inductor 3, common mode capacitors CY1 and CY2 are implemented by multilayer ceramic capacitor pieces inside a filter socket 1, differential mode capacitors CX1 and CX2, the differential mode inductors LD1 and LD2 form a differential mode circuit in a filter circuit, the common mode capacitors CY1 and CY2 and the common mode inductor L form a common mode circuit in the filter circuit, and a lightning pulse protection function is implemented by a transient suppression diode 11.

The above description is only a preferred embodiment of the present invention, and many changes can be made in the detailed description and the application scope according to the idea of the present invention for those skilled in the art, which all belong to the protection scope of the present invention as long as the changes do not depart from the concept of the present invention.

Claims

1. The utility model provides a thunder and lightning pulse protection power filter connector which characterized in that: including filtering socket (1), ceramic capacitor (2), common mode inductance (3) and metal protecting crust (4), filtering socket (1) afterbody is fixed with the circuit board, the welding has transient suppression diode (11) on the circuit board, filtering socket (1) is connected with ceramic capacitor (2), common mode inductance (3) through wire (5) and is constituteed filter circuit, afterbody, ceramic capacitor (2) and common mode inductance (3) of filtering socket (1) are sealed in the protecting crust, be provided with the casting glue in metal protecting crust (4), metal protecting crust (4) afterbody has the through-hole, wire (5) warp the through-hole and extend to metal protecting crust (4) outside, and the parcel has wave-proof cover (6) on wire (5) outside metal protecting crust (4).

2. The lightning impulse protection power filter connector of claim 1, wherein: the metal protection shell (4) comprises a frame, a front mounting plate and a rear mounting plate, wherein the front mounting plate and the rear mounting plate are fixedly connected with the frame through screws and nuts.

3. The lightning impulse protection power filter connector of claim 2, wherein: and the outer surface of the front mounting plate is also covered with a conductive rubber pad (7).

4. The lightning impulse protection power filter connector of claim 1, wherein: the lead (5) is a polytetrafluoroethylene lead.

5. The lightning impulse protection power filter connector of claim 1, wherein: the number of the ceramic capacitors (2) is two.