CN214312834U

CN214312834U - Common mode inductor

Info

Publication number: CN214312834U
Application number: CN202120599107.8U
Authority: CN
Inventors: 鞠万金; 吴杰英; 安兰; 刘宏; 罗新良
Original assignee: SHENZHEN JINGQUANHUA ELECTRONICS CO LTD
Current assignee: SHENZHEN JINGQUANHUA ELECTRONICS CO LTD
Priority date: 2021-03-24
Filing date: 2021-03-24
Publication date: 2021-09-28
Anticipated expiration: 2031-03-24

Abstract

A common mode inductor comprises a base, a magnetic core, a shell arranged on the base, a first winding and a second winding, wherein the shell comprises an inner peripheral wall, an outer peripheral wall opposite to the inner peripheral wall, a first panel and a second panel opposite to the first panel; the first winding is wound on the inner peripheral wall, the first panel, the outer peripheral wall and the second panel; the second winding is wound on the inner peripheral wall, the first panel, the outer peripheral wall and the second panel. The common mode inductor in this application is with the help of the design of casing so that the magnetic core with stable insulation between first winding and the second winding, effectively guarantees common mode inductor's life.

Description

Common mode inductor

Technical Field

The present application relates to the field of electromagnetic technology, and more particularly, to a common mode inductor.

Background

Currently, a common mode inductor is mainly composed of a magnetic core and a coil wound on the magnetic core. The core of the common mode inductor should be insulated from the coil to prevent breakdown between the two under transient overvoltage. The existing common mode inductor usually adopts a mode of coating a layer of insulating paint on the surface of the magnetic core to realize insulation between the magnetic core and the coil. However, the production process of coating the insulating paint on the surface of the magnetic core is complex, the environmental protection problem is easy to occur in the process of coating the insulating paint, and meanwhile, the insulating paint is easy to wear and fall off in the use process, so that the service life of the common mode inductor is influenced. In addition, the magnetic core, which is the most important element in the common mode inductor, is usually exposed outside, so that the problem that the magnetic core is damaged due to external force such as dropping or collision easily occurs during the installation and use of the common mode inductor.

SUMMERY OF THE UTILITY MODEL

Therefore, it is desirable to provide a common mode inductor to solve the above problems.

A common mode inductor comprises a base, a magnetic core, a shell arranged on the base, a first winding and a second winding, wherein the shell comprises an inner peripheral wall, an outer peripheral wall opposite to the inner peripheral wall, a first panel and a second panel opposite to the first panel; the first winding is wound on the inner peripheral wall, the first panel, the outer peripheral wall and the second panel; the second winding is wound on the inner peripheral wall, the first panel, the outer peripheral wall and the second panel.

In some embodiments, the housing comprises a first housing section and a second housing section connecting the first housing section;

the first shell subsection comprises a first inner peripheral wall, a first outer peripheral wall and a first panel, wherein the first outer peripheral wall is opposite to the first inner peripheral wall, the first panel is connected between the first inner peripheral wall and the first outer peripheral wall, and forms a first containing groove together with the first inner peripheral wall and the first outer peripheral wall;

the second shell subsection comprises a second inner peripheral wall, a second outer peripheral wall and a second panel, wherein the second outer peripheral wall is opposite to the second inner peripheral wall, the second panel is connected between the second inner peripheral wall and the second outer peripheral wall and forms a second containing groove together with the second inner peripheral wall and the second outer peripheral wall, and the first containing groove and the second containing groove are communicated to form the containing space together.

In some embodiments, the first housing section further includes a first connection portion and a second connection portion, the first inner peripheral wall includes a first edge facing away from the first panel, the first outer peripheral wall includes a second edge facing away from the first panel, the first connection portion is formed by the first edge extending in a direction facing away from the first panel, the first connection portion and the first edge together form a first slot, the second connection portion is formed by the second edge extending in a direction facing away from the first panel, the second connection portion and the second edge together form a second slot, an end of the second inner peripheral wall facing away from the second panel is clamped in the first slot, and an end of the second outer peripheral wall facing away from the second panel is clamped in the second slot.

In some embodiments, the base includes a bottom plate and a partition plate disposed on the bottom plate, the inner circumferential wall surrounds a through hole penetrating through the housing, the housing is disposed on the bottom plate, the partition plate is disposed in the through hole, and the first winding and the second winding are respectively located on two sides of the partition plate.

In some embodiments, the base further includes two oppositely disposed fixing posts, the two fixing posts are disposed on a surface of the bottom plate facing the housing, and the housing is located between the two fixing posts.

In some embodiments, the floor and the partition are integrally formed.

In some embodiments, the base further comprises a peripheral wall protruding from the surface of the bottom plate facing the housing and surrounding the outer edge of the bottom plate.

In some embodiments, the first winding includes a plurality of first winding groups, the second winding includes a plurality of second winding groups, and the first winding group and the second winding group are both three-wire and wound coils.

In some embodiments, the common mode inductor further includes a first external terminal and a second external terminal, the first external terminal is connected to the first winding set and exposed out of the bottom plate, and the second external terminal is connected to the second winding set and exposed out of the bottom plate.

In some embodiments, the bottom plate further defines a first through hole and a second through hole, the first external terminal is disposed through the first through hole and exposed out of the bottom plate, and the second external terminal is disposed through the second through hole and exposed out of the bottom plate.

The common mode inductor in some embodiments of the present application utilizes the design of the housing to provide stable insulation between the magnetic core and the first winding and the second winding, thereby ensuring the service life of the common mode inductor. In addition, the mode that the shell is used for realizing the insulation between the magnetic core and the first winding and the second winding is more environment-friendly and simpler in production process compared with the existing mode that the insulation between the magnetic core and the coil is realized by using insulating paint, and the problem that the service life of the common-mode inductor is influenced due to the fact that the insulating paint is abraded and falls off is avoided. In addition, the magnetic core is effectively protected by the shell, and the problem that the magnetic core is damaged due to external force such as falling or collision during installation or use of the common mode inductor is solved.

Drawings

Fig. 1 is a schematic structural diagram of a common mode inductor according to an embodiment of the present application.

Fig. 2 is an exploded view of the common mode inductor shown in fig. 1.

Fig. 3 is an exploded view of the common mode inductor shown in fig. 2 from another perspective.

Fig. 4 is a schematic structural view of the housing shown in fig. 1.

Fig. 5 is an exploded view of the housing and magnetic core of fig. 1.

Fig. 6 is an exploded view of the housing and core of fig. 5 from another perspective.

FIG. 7 is a cross-sectional view taken along line VII-VII shown in FIG. 4.

Description of the main elements

Common mode inductor 1

Base 10

Base plate 11

The first through hole 111

Second through hole 112

Partition plate 12

Fixing post 13

Peripheral wall 14

Magnetic core 20

Housing 30

Inner peripheral wall 301

Outer peripheral wall 302

First panel 303

Second panel 304

Accommodating space 305

Through-hole 306

First housing subsection 31

First inner circumferential wall 311

First edge 3111

First outer peripheral wall 312

Second edge 3121

First receiving groove 313

First connection portion 314

Second connecting part 315

First card slot 316

Second card slot 317

Second housing subsection 32

Second inner circumferential wall 321

Second peripheral wall 322

Second receiving groove 323

First winding 40

First winding group 41

Second winding 50

Second winding group 51

First external terminal 61

Second external terminal 62

The following detailed description will further illustrate the present application in conjunction with the above-described figures.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the description of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.

Some embodiments of the present application will be described in detail below with reference to the accompanying drawings. The embodiments described below and the features of the embodiments can be combined with each other without conflict.

Referring to fig. 1, some embodiments of the present application provide a common mode inductor 1. Referring to fig. 4, 5 and 7, the common mode inductor 1 includes a base 10, a magnetic core 20, a housing 30 disposed on the base 10, a first winding 40 and a second winding 50. The housing 30 includes an inner peripheral wall 301, an outer peripheral wall 302 facing away from the inner peripheral wall 301, a first panel 303, and a second panel 304 facing away from the first panel 303. The first panel 303 and the second panel 304 are connected between the inner circumferential wall 301 and the outer circumferential wall 302, respectively, and form a housing space 305 together with the inner circumferential wall 301 and the outer circumferential wall 302. The core 20 is accommodated in the accommodating space 305. The first winding 40 is wound around the inner peripheral wall 301, the first panel 303, the outer peripheral wall 302, and the second panel 304. The second winding 50 is wound around the inner peripheral wall 301, the first panel 303, the outer peripheral wall 302, and the second panel 304.

Referring to fig. 1 to 7, the common mode inductor 1 in some embodiments of the present application utilizes the design of the housing 30 to stably insulate the magnetic core 20 from the first winding 40 and the second winding 50, thereby ensuring the service life of the common mode inductor 1. In addition, the mode of using the shell 30 to realize insulation between the magnetic core 20 and the first winding 40 and the second winding 50 is more environment-friendly and simpler in production process compared with the existing mode of using insulating paint to realize insulation between the magnetic core and the coil, and the problem that the service life of the common mode inductor 1 is affected due to abrasion and falling of the insulating paint is also avoided. In addition, the magnetic core 20 is effectively protected by the housing 30, and the problem that the magnetic core 20 is damaged by external force such as falling or collision during installation or use of the common mode inductor 1 is solved.

In some embodiments, the magnetic core 20 is annular in shape.

In some embodiments, referring to fig. 1 and 4, the housing 30 is annular. The inner circumferential wall 301 surrounds a through hole 306 formed through the housing 30. In this way, the first winding 40 and the second winding 50 can be wound around the inner peripheral wall 301, the first panel 303, the outer peripheral wall 302, and the second panel 304 via the through hole 306.

In some embodiments, referring to fig. 4-7, the housing 30 comprises a first housing subsection 31 and a second housing subsection 32 connecting the first housing subsection 31. The first housing section 31 includes a first inner peripheral wall 311, a first outer peripheral wall 312 facing away from the first inner peripheral wall 311, and the first panel 303. The first panel 303 is connected between the first inner circumferential wall 311 and the first outer circumferential wall 312, and forms a first receiving groove 313 together with the first inner circumferential wall 311 and the first outer circumferential wall 312. The second housing subsection 32 includes a second inner peripheral wall 321, a second outer peripheral wall 322 facing away from the second inner peripheral wall 321, and the second panel 304. The second panel 304 is connected between the second inner circumferential wall 321 and the second outer circumferential wall 322, and forms a second receiving groove 323 together with the second inner circumferential wall 321 and the second outer circumferential wall 322. Wherein an edge of the first inner peripheral wall 311 facing away from the first panel 303 connects an edge of the second inner peripheral wall 321 facing away from the second panel 304. The edge of the first peripheral wall 312 facing away from the first panel 303 connects the edge of the second peripheral wall 322 facing away from the second panel 304. In this way, the first receiving groove 313 and the second receiving groove 323 communicate to form the receiving space 305 together.

It is to be understood that, referring to fig. 4, the first inner circumferential wall 311 and the second inner circumferential wall 321, which are connected together, form the inner circumferential wall 301. The first peripheral wall 312 and the second peripheral wall 322 connected together form the peripheral wall 302.

In some embodiments, referring to fig. 4-6, the first housing section 31 further includes a first connection 314 and a second connection 315. The first inner peripheral wall 311 includes a first edge 3111 facing away from the first panel 303. The first peripheral wall 312 includes a second edge 3121 facing away from the first panel 303. The first connection portion 314 is formed by extending the first edge 3111 in a direction away from the first panel 303. The first connection portion 314 and the first edge 3111 together form a first card slot 316. The second connecting portion 315 is formed by extending the second edge 3121 in a direction away from the first panel 303. The second connecting portion 315 and the second edge 3121 together form a second card slot 317. One end of the second inner peripheral wall 321, which faces away from the second panel 304, is clamped in the first clamping groove 316, and one end of the second outer peripheral wall 322, which faces away from the second panel 304, is clamped in the second clamping groove 317. In this way, a fixed connection between the first housing section 31 and the second housing section 32 is achieved by the cooperation of the second inner peripheral wall 321 and the first slot 316 and the cooperation of the second outer peripheral wall 322 and the second slot 317.

In other embodiments, the first connection portion 314 and the second connection portion 315 may be omitted. In this way, the connection between the first inner peripheral wall 311 and the second inner peripheral wall 321, and the connection between the first outer peripheral wall 312 and the second outer peripheral wall 322 are not limited to bonding, welding, or the like.

In some embodiments, referring to fig. 1 and 2, the base 10 includes a bottom plate 11 and a partition 12 disposed on the bottom plate 11. The housing 30 is disposed on the bottom plate 11, and the partition 12 is disposed in the through hole 306. The first winding 40 and the second winding 50 are respectively located at both sides of the separator 12.

In some embodiments, referring to fig. 2, the bottom plate 11 and the partition plate 12 are integrally formed, so that a separate mold opening for manufacturing the partition plate 12 is not required in the manufacturing process of the common mode inductor 1, thereby reducing the manufacturing cost of the common mode inductor 1 as a whole.

In some embodiments, referring to fig. 1 to 3, the base 10 further includes two fixing posts 13 disposed oppositely. The two fixing posts 13 extend substantially vertically from the bottom plate 11, and are located on the same surface of the bottom plate 11 as the partition plate 12, that is, the two fixing posts 13 and the partition plate 12 are located on the surface of the bottom plate 11 facing the housing 30. Wherein the housing 30 is located between the two fixing posts 13 for preventing the coils of the first winding 40 and the second winding 50 located at both sides of the partition 12 from being shifted.

In some embodiments, referring to fig. 1-3, the base 10 further comprises a peripheral wall 14. The peripheral wall 14 is protruded from the surface of the bottom plate 11 facing the housing 30 and surrounds the outer edge of the bottom plate 11. Wherein the peripheral wall 14 is provided to prevent deformation of the base 10.

In some embodiments, referring to fig. 1-3, the first winding 40 includes a plurality of first winding groups 41. The second winding 50 includes a plurality of second winding groups 51. The first winding group 41 and the second winding group 51 are three-wire and parallel-wound coils.

In the present embodiment, referring to fig. 1 to 3, the first winding 40 includes five first winding groups 41. The second winding 50 includes five second winding groups 51. It is understood that, in other embodiments, the number of the first winding groups 41 and the second winding groups 51 may be adaptively adjusted according to actual requirements.

In some embodiments, referring to fig. 1 to 3, the common mode inductor 1 further includes a plurality of first external terminals 61 and a plurality of second external terminals 62. The first external terminal 61 is connected to the first winding set 41 and exposed out of the bottom plate 11 to serve as a connection terminal of the common mode inductor 1. The second external terminal 62 is connected to the second winding group 51 and exposed out of the bottom plate 11 to serve as a connection terminal of the common mode inductor 1.

It is understood that the number of the first external terminal 61 and the second external terminal 62 can be adjusted adaptively according to actual requirements, and is not limited to one or two.

In some embodiments, referring to fig. 1 to 3, the bottom plate 11 further defines a first through hole 111 and a second through hole 112. Thus, the first external terminal 61 can pass through the first through hole 111 and be exposed out of the bottom plate 11. The second external terminal 62 can pass through the second through hole 112 and be exposed out of the bottom plate 11.

Although the present application has been described with reference to a preferred embodiment, it should be understood that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the invention as defined by the appended claims.

Claims

1. A common mode inductor comprising a base, characterized in that the common mode inductor further comprises:

a magnetic core;

the shell is arranged on the base and comprises an inner peripheral wall, an outer peripheral wall back to the inner peripheral wall, a first panel and a second panel back to the first panel, the first panel and the second panel are respectively connected between the inner peripheral wall and the outer peripheral wall and form a containing space together with the inner peripheral wall and the outer peripheral wall, and the magnetic core is contained in the containing space;

the first winding is wound on the inner peripheral wall, the first panel, the outer peripheral wall and the second panel; and

and the second winding is wound on the inner peripheral wall, the first panel, the outer peripheral wall and the second panel.

2. The common mode inductor of claim 1, wherein the housing comprises a first housing section and a second housing section connecting the first housing section;

3. The common mode inductor of claim 2, wherein the first housing section further comprises a first connection portion and a second connection portion, the first inner peripheral wall including a first edge facing away from the first panel, the first outer peripheral wall including a second edge facing away from the first panel, the first connecting part is formed by extending the first edge in a direction back to the first panel, the first connecting part and the first edge form a first clamping groove together, the second connecting part is formed by extending the second edge towards the direction back to the first panel, the second connecting portion and the second edge form a second clamping groove together, one end, back to the second panel, of the second inner peripheral wall is clamped in the first clamping groove, and one end, back to the second panel, of the second outer peripheral wall is clamped in the second clamping groove.

4. The common mode inductor as claimed in claim 1, wherein the base includes a bottom plate and a partition plate disposed on the bottom plate, the inner peripheral wall surrounds a through hole formed through the housing, the housing is disposed on the bottom plate, the partition plate is disposed in the through hole, and the first winding and the second winding are respectively disposed on two sides of the partition plate.

5. The common mode inductor as claimed in claim 4, wherein the base further comprises two oppositely disposed fixing posts disposed on a surface of the bottom plate facing the housing, and the housing is disposed between the two fixing posts.

6. A common-mode inductor according to claim 4 or 5, characterized in that the bottom plate and the partition plate are integrally formed.

7. A common-mode inductor according to claim 4 or 5, characterized in that the base further comprises a peripheral wall protruding from the surface of the bottom plate facing the housing and surrounding the outer edge of the bottom plate.

8. The common mode inductor as claimed in claim 4 or 5, wherein said first winding includes a plurality of first winding groups and said second winding includes a plurality of second winding groups, and wherein said first winding groups and said second winding groups are each three wires and are wound around a coil.

9. The common mode inductor of claim 8, further comprising a first external terminal and a second external terminal, the first external terminal being connected to the first winding group and exposed to the bottom plate, the second external terminal being connected to the second winding group and exposed to the bottom plate.

10. The common mode inductor as claimed in claim 9, wherein the bottom plate further defines a first through hole and a second through hole, the first external terminal is disposed through the first through hole and exposed out of the bottom plate, and the second external terminal is disposed through the second through hole and exposed out of the bottom plate.