CN211654546U

CN211654546U - Flat wire common mode inductor

Info

Publication number: CN211654546U
Application number: CN202020350579.5U
Authority: CN
Inventors: 李福喜; 孙磊; 陶根勇; 孙瑞友; 孙臣斌; 范雪梅; 李梅; 郭伟
Original assignee: Doublecircle Inductor Co ltd Of Bengbu
Current assignee: ANHUI CHANGSHENG ELECTRONICS CO.,LTD.
Priority date: 2020-03-19
Filing date: 2020-03-19
Publication date: 2020-10-09
Anticipated expiration: 2030-03-19

Abstract

The utility model discloses a flat wire common mode inductor, which comprises a magnetic core, a coil and a base, wherein the magnetic core comprises two crossbeams and two longitudinal beams, the coil is symmetrically wound on the two longitudinal beams of the magnetic core, the cross sectional area of the crossbeam of the magnetic core is 0.25-0.5 times of that of the longitudinal beams, and the top surface and the bottom surface of each crossbeam are respectively provided with a rectangular strip bulge; the bottom surface of the base is provided with a cross reinforcing rib; the size of the magnetic core is reduced, so that the cross beam is narrowed, the size of a product can be reduced on the premise of ensuring the magnetic circuit counteraction effect, the strength of the magnetic core can be ensured by increasing the rectangular strip protrusions, and the magnetic core cannot be damaged when a coil is wound; in addition, the bottom surface at the base sets up the cross strengthening rib, can reduce the deformation of base when welding the pin, improves product quality.

Description

Flat wire common mode inductor

Technical Field

The utility model relates to an electrical element technical field specifically is a flat line common mode inductance.

Background

Common mode inductors (also called Common mode chokes) are commonly used in various switching power supplies to filter Common mode electromagnetic interference signals. In the board design, the common mode inductor also plays a role in EMI filtering, and is used for inhibiting electromagnetic waves generated by the high-speed signal line from radiating and emitting outwards.

Common mode inductance twines two sets of coils on the magnet usually, the part that every group coil was drawn forth is connected with live wire and zero line respectively, current common mode inductance generally all adopts ring shape magnet, and twine the enameled wire at magnet both ends, and general enameled wire is owing to be columniform, all need manual operation when the wire winding, lead to production efficiency low, even adopt automatic coil winding machine to coil, the coil of winding out all is the multilayer wire winding, and is large, there is the danger of turn-to-turn short circuit, short service life, distributed capacitance is high, it is relatively poor to restrain the interference signal effect, use frequency range shortcoming such as limited.

At present, there is an SQ flat wire common mode inductor, including magnetic core, coil and base, the coil adopts flat enameled wire, only has the one deck, and directly winds on the magnetic core, can evenly distributed on the magnetic core, and distributed capacitance is little, and interference signal suppression is good, and the frequency range of use is wide. However, the pins and the coil need to be welded by tin soldering, so that the base is easy to deform due to high temperature during welding; in addition, the four sides of the magnetic core have the same size, wherein two sides are wound with the coil, the other two sides are not wound with the coil, and the magnetic circuit cancellation effect of the two sides which are not wound with the coil is strongest, so that unnecessary waste is caused.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a flat line common mode inductance, this common mode inductance can reduce the product size under the prerequisite of guaranteeing the magnetic circuit counteraction to be difficult to deformation when the soldering.

The utility model provides a technical scheme that its technical problem adopted is:

a common-mode inductor for flat wires comprises a magnetic core, a coil and a base, wherein the magnetic core comprises two cross beams and two longitudinal beams, and the coil is wound on the two longitudinal beams of the magnetic core symmetrically; the cross section area of the magnetic core cross beam is 0.25-0.5 times of that of the longitudinal beam, and the top surface and the bottom surface of each cross beam are respectively provided with rectangular protrusions; the bottom surface of the base is provided with a cross reinforcing rib.

The utility model has the advantages that the volume of the magnetic core is reduced, the cross beam is narrowed, and the cross section area of the cross beam is 0.25-0.5 times of that of the longitudinal beam, so that the size of a product can be reduced on the premise of ensuring the magnetic circuit counteraction effect, the strength of the magnetic core can be ensured by increasing the rectangular strip bulges, and the magnetic core cannot be damaged when a coil is wound; in addition, the bottom surface at the base sets up the cross strengthening rib, can reduce the deformation of base when welding the pin, improves product quality.

Drawings

The invention will be further described with reference to the following figures and examples:

fig. 1 is a schematic structural diagram of the present invention;

fig. 2 is a bottom perspective view of the present invention.

Detailed Description

With reference to fig. 1 and 2, the present invention provides a flat wire common mode inductor, which includes a magnetic core, a coil 2 and a base 3, wherein the magnetic core includes two beams 11 and two longitudinal beams 12, the beams are connected to the longitudinal beams to form a closed rectangle, and the coil 2 is symmetrically wound around the two longitudinal beams 12 of the magnetic core; the cross section area of the magnetic core cross beam 11 is 0.25-0.5 times of that of the longitudinal beam 12, and rectangular strip protrusions 13 are respectively arranged on the top surface and the bottom surface of each cross beam 11; the thickness of the rectangular strip bulge 13 is consistent with that of the cross beam 11, and the rectangular strip bulge and the cross beam are of an integrated structure; the bottom surface of the base 3 is provided with a cross reinforcing rib 31.

The size of the magnetic core is reduced, so that the cross beam 11 is narrowed, the cross section area of the cross beam is 0.25-0.5 times of that of the longitudinal beam, the size of a product can be reduced on the premise of ensuring the magnetic circuit counteraction effect, the rectangular strip protrusions 13 are increased, the strength of the magnetic core can be ensured, and the magnetic core cannot be damaged when a coil is wound; in addition, the bottom surface of the base is provided with the cross reinforcing ribs 31, so that the deformation of the base 3 can be reduced when pins are welded, and the product quality is improved.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in any way; the invention is not limited to the embodiments described herein, but is capable of other embodiments according to the invention, and may be used in various other applications, including, but not limited to, industrial. Therefore, any simple modification, equivalent replacement, equivalent change and modification made to the above embodiments by the technical entity of the present invention all still belong to the protection scope of the technical solution of the present invention.

Claims

1. A common-mode inductor for flat wires comprises a magnetic core, a coil and a base, wherein the magnetic core comprises two cross beams and two longitudinal beams, and the coil is wound on the two longitudinal beams of the magnetic core symmetrically; the bottom surface of the base is provided with a cross reinforcing rib.