CN219759361U - Common-differential mode integrated inductor - Google Patents
Common-differential mode integrated inductor Download PDFInfo
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- CN219759361U CN219759361U CN202320287073.8U CN202320287073U CN219759361U CN 219759361 U CN219759361 U CN 219759361U CN 202320287073 U CN202320287073 U CN 202320287073U CN 219759361 U CN219759361 U CN 219759361U
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Abstract
The utility model relates to a common-differential-mode integrated inductor which comprises an E-shaped magnetic core, an I-shaped magnetic core, a framework and a coil, wherein the E-shaped magnetic core is composed of a base block, a middle post and two side posts which are arranged on the base block, the shapes and the sizes of the two side posts are identical, the height of the middle post is lower than that of the side posts, the I-shaped magnetic core is covered on the two side posts of the E-shaped magnetic core, a magnetic core with a peripheral opening sub-structure formed by the combination of the E-shaped magnetic core and the I-shaped magnetic core is used as a magnetic circuit of the common-mode inductor, the middle post of the E-shaped magnetic core amplifies leakage inductance of the common-mode inductor, the leakage inductance is used as a differential-mode inductor, the framework is clamped on the combination formed by the E-shaped magnetic core and the I-shaped magnetic core, and the coil is wound on the framework. The common-differential mode integrated inductor provided by the utility model has only one skeleton, the stitch distance precision of the skeleton is higher, and the product reliability is better. The common mode inductance and the differential mode inductance of the common-differential mode integrated inductance provided by the utility model are manufactured in an integrated way, so that the cost is lower.
Description
Technical Field
The utility model relates to the technical field of inductors, in particular to a common-differential mode integrated inductor.
Background
When the switching power supply works in a high-frequency state, electromagnetic interference is necessarily generated, and common-mode inductance and differential-mode inductance are necessarily added to reduce the electromagnetic interference, but the traditional power supply has limited space, and two magnetic elements are not installed in enough positions, so that the required space needs to be enlarged. At the present stage, two sets of frameworks are designed for some inductors, two magnetic elements are respectively placed, two sets of dies are needed for designing the two frameworks, and the overall cost is relatively high; in addition, the distance consistency of the pins after combination is poor due to the structure of the two sets of frameworks, and larger pad spaces of the substrate are needed for compatibility.
Disclosure of Invention
The utility model aims to provide a common-differential mode integrated inductor so as to solve the problems in the prior art.
In order to achieve the above purpose, the present utility model provides the following technical solutions:
the utility model discloses a common-differential-mode integrated inductor, which comprises an E-shaped magnetic core, an I-shaped magnetic core, a framework and a coil, wherein the E-shaped magnetic core is composed of a base block, a middle column and two side columns, wherein the middle column and the two side columns are arranged on the base block, the shapes and the sizes of the two side columns are consistent, the height of the middle column is lower than that of the side columns, the I-shaped magnetic core is covered on the two side columns of the E-shaped magnetic core, the magnetic core with a peripheral opening sub-structure formed by the combination of the E-shaped magnetic core and the I-shaped magnetic core is used as a magnetic circuit of the common-mode inductor, the middle column of the E-shaped magnetic core amplifies leakage inductance of the common-mode inductor, the leakage inductance is used as a differential-mode inductor, the framework is clamped on the combination formed by the E-shaped magnetic core and the I-shaped magnetic core, and the coil is wound on the framework.
Preferably, two winding grooves are arranged above the framework, and each winding groove is internally wound with one coil.
Further preferably, the two winding grooves wind two identical coils in the same direction.
Preferably, a clamping groove into which the combination formed by the E-shaped magnetic core and the I-shaped magnetic core can be assembled is arranged below the framework.
Preferably, the E-type magnetic core and the I-type magnetic core are made of high-conductivity ferrite materials respectively.
Preferably, the skeleton is symmetrically provided with four pins.
Compared with the prior art, the utility model has at least the following advantages:
the common-differential mode integrated inductor provided by the utility model has only one skeleton, the stitch distance precision of the skeleton is higher, and the product reliability is better.
The common mode inductance and the differential mode inductance of the common-differential mode integrated inductance provided by the utility model are manufactured in an integrated way, so that the cost is lower.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings that are required to be used in the description of the embodiments will be briefly described below.
FIG. 1 is a schematic diagram of the structure of a common-mode and differential-mode integrated inductor of the present utility model;
fig. 2 is a front view of a common-mode integrated inductor of the present utility model;
fig. 3 is an exploded view of the common-mode integrated inductor of the present utility model.
Detailed Description
In order to make the objects, technical solutions, and advantages of the present utility model more apparent, the embodiments of the present utility model will be further described in detail with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are some, but not all, embodiments of the present utility model, are intended to be illustrative only and not limiting of the embodiments of the present utility model, and that all other embodiments obtained by persons of ordinary skill in the art without making any inventive effort are within the scope of the present utility model.
Referring to fig. 1 to 3, an embodiment of the present utility model discloses a common-differential-mode integrated inductor, which includes an E-type magnetic core 1, an I-type magnetic core 2, a frame 3 and a coil 4, wherein the E-type magnetic core 1 is composed of a base block 11, a middle post 13 and two side posts 12 arranged on the base block 11, the two side posts 12 are identical in shape and size, the middle post 13 is lower than the side posts 12, the I-type magnetic core 2 covers the two side posts 12 of the E-type magnetic core 1, a magnetic core with a peripheral opening sub-structure formed by the combination of the E-type magnetic core 1 and the I-type magnetic core 2 is used as a magnetic circuit of the common-mode inductor, the middle post 13 of the E-type magnetic core 1 amplifies leakage inductance, the leakage inductance is used as a differential-mode inductor, the frame 3 is clamped on a combination formed by the E-type magnetic core 1 and the I-type magnetic core 2, the coil 4 is wound on the frame 3, and the frame 3 is symmetrically provided with four pins 32. Wherein, two winding grooves 31 are arranged above the framework 3, and a coil 4 is wound in each winding groove 31. Further, the two winding grooves 31 wind two identical coils 4 in the same direction.
The two coils 4 with completely consistent turns have very small magnetic leakage in a closed magnetic circuit, the magnetic leakage inductance is amplified by using the middle column 13 of the magnetic core, and on the premise of not influencing the inductance of the common-mode inductance, a differential-mode inductance which can independently adjust the inductance is formed, and the DC-resistant saturation of the differential-mode inductance can be adjusted by the air gap of the middle column 13.
A clamping groove 32 into which the combination of the E-shaped magnetic core 1 and the I-shaped magnetic core 2 can be assembled is provided below the frame 3. The assembling mode of the framework 3, the E-shaped magnetic core 1 and the I-shaped magnetic core 2 is convenient and quick.
The E-type magnetic core 1 and the I-type magnetic core 2 are made of high-conductivity ferrite materials respectively, and provide high inductance.
Through the scheme, only one framework 3 of the common-differential mode integrated inductor is provided, the distance precision of pins of the framework 3 is higher, and the product reliability is better; the common mode inductance and the differential mode inductance are manufactured in an integrated way, so that the cost is lower.
Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the utility model. Thus, the present utility model is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (6)
1. A common-differential mode integrated inductor is characterized in that: comprises an E-shaped magnetic core, an I-shaped magnetic core, a framework and a coil, wherein the E-shaped magnetic core is composed of a base block, a middle post and two side posts which are arranged on the base block, the shapes and the sizes of the two side posts are consistent, the height of the middle post is lower than that of the side posts, the I-shaped magnetic core is covered on the two side posts of the E-shaped magnetic core, the magnetic core with the peripheral opening sub-structure formed by the E-shaped magnetic core and the I-shaped magnetic core is used as a magnetic circuit of a common-mode inductor, a center post of the E-shaped magnetic core amplifies leakage inductance of the common-mode inductor, the leakage inductance is used as a differential-mode inductor, the framework is clamped on the combination formed by the E-shaped magnetic core and the I-shaped magnetic core, and the coil is wound on the framework.
2. A common-mode integrated inductor as claimed in claim 1, wherein: two winding grooves are formed in the upper portion of the framework, and a coil is wound in each winding groove.
3. A common-mode integrated inductor as claimed in claim 2, wherein: the two winding grooves wind two identical coils in the same direction.
4. A common-mode integrated inductor as claimed in claim 1, wherein: and a clamping groove which can be assembled by a combination formed by the E-shaped magnetic core and the I-shaped magnetic core is arranged below the framework.
5. A common-mode integrated inductor as claimed in claim 1, wherein: the E-shaped magnetic core and the I-shaped magnetic core are made of high-conductivity ferrite materials respectively.
6. A common-mode integrated inductor as claimed in claim 1, wherein: the skeleton is symmetrically provided with four pins.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320287073.8U CN219759361U (en) | 2023-02-22 | 2023-02-22 | Common-differential mode integrated inductor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320287073.8U CN219759361U (en) | 2023-02-22 | 2023-02-22 | Common-differential mode integrated inductor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219759361U true CN219759361U (en) | 2023-09-26 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320287073.8U Active CN219759361U (en) | 2023-02-22 | 2023-02-22 | Common-differential mode integrated inductor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219759361U (en) |
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2023
- 2023-02-22 CN CN202320287073.8U patent/CN219759361U/en active Active
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