阅读说明：本技术 一种差共模一体磁芯 (Differential-common mode integrated magnetic core ) 是由 肖育泳 马华许 徐猛 于 2021-02-25 设计创作，主要内容包括：本发明公开了一种差共模一体磁芯,其特征在于：包括第一磁芯、第二磁芯、第三磁芯、第一导体以及第二导体,所述第一磁芯、第二磁芯、第三磁芯均为呈环状的框架结构,所述第一磁芯的一边侧与所述第二磁芯的一边侧并排贴合形成有贴合面,所述第一磁芯及第二磁芯对应所述贴合面位置开设有连通的气隙,所述第一导体穿设于所述第一磁芯及第三磁芯的内环侧,所述第二导体穿设于所述第二磁芯及第三磁芯的内环侧。本发明具有高的差模电感量及高的直流偏置能力,同时还具有高的共模电感量。(The invention discloses a differential-mode and common-mode integrated magnetic core, which is characterized in that: including first magnetic core, second magnetic core, third magnetic core, first conductor and second conductor, first magnetic core, second magnetic core, third magnetic core are and are annular frame construction, an avris of first magnetic core with the laminating side by side of one side of second magnetic core is formed with the binding face, first magnetic core and second magnetic core correspond the air gap of intercommunication is seted up to the binding face position, first conductor wears to locate the inner ring side of first magnetic core and third magnetic core, the second conductor wears to locate the inner ring side of second magnetic core and third magnetic core. The invention has high differential mode inductance, high direct current bias capability and high common mode inductance.)

1. A difference common mode integrative magnetic core which characterized in that: including first magnetic core, second magnetic core, third magnetic core, first conductor and second conductor, first magnetic core, second magnetic core, third magnetic core are and are annular frame construction, an avris of first magnetic core with the laminating side by side of one side of second magnetic core is formed with the binding face, first magnetic core and second magnetic core correspond the air gap of intercommunication is seted up to the binding face position, first conductor wears to locate the inner ring side of first magnetic core and third magnetic core, the second conductor wears to locate the inner ring side of second magnetic core and third magnetic core.

2. The differential-mode and common-mode integrated magnetic core according to claim 1, wherein the first magnetic core and the second magnetic core are disposed at an inner-ring-side position of the third magnetic core.

3. The differential-mode and common-mode integrated magnetic core according to claim 2, wherein the first magnetic core and the second magnetic core are nested in close fit in an inner-ring-side position of the third magnetic core.

4. The integrated core according to claim 1, wherein the first core, the second core, and the third core are axially arranged in parallel, and the third core is arranged in abutment with a front side or a rear side of the first core and the second core in an axial direction thereof.

5. The integrated core according to claim 1, wherein the width L of the air gap is 0.05-5 mm.

6. The integrated core according to claim 1, wherein the air gap is formed at a middle position of the abutting surface.

7. The differential-mode and common-mode integrated magnetic core of claim 1, wherein the first magnetic core, the second magnetic core are a high saturation flux density material and/or the third magnetic core is a high permeability material.

8. The differential-mode integrated magnetic core according to claim 1, wherein the first conductor and the second conductor are a positive conductor and a negative conductor, respectively.

9. The differential-mode integrated magnetic core according to claim 1, wherein the first magnetic core and the second magnetic core are identical in shape and magnetism.

10. The integrated core according to any one of claims 1 to 9, wherein the first core and/or the second core and/or the third core are cut to form a butt structure with reference to the air gap.

Technical Field

The invention relates to the technical field of electronic devices, in particular to a differential-mode and common-mode integrated magnetic core.

Background

With the development of new energy vehicles, the current from the battery to the MCU (e machine and inverter) module is quite large, the MCU generates noise signals in the process of converting DC to AC, and such signals must be filtered out or otherwise cannot meet the EMC standard requirements.

Disclosure of Invention

The invention aims to overcome the defects of the prior art and provide a differential-mode and common-mode integrated magnetic core which has high differential-mode inductance and high direct-current bias capability and also has high common-mode inductance.

The utility model provides an integrative magnetic core of difference common mode, includes first magnetic core, second magnetic core, third magnetic core, first conductor and second conductor, first magnetic core, second magnetic core, third magnetic core are and are annular frame construction, a avris of first magnetic core with one side of second magnetic core is laminated side by side and is formed with the binding face, first magnetic core and second magnetic core correspond the air gap of intercommunication is seted up to the binding face position, first conductor wears to locate the inner ring side of first magnetic core and third magnetic core, the second conductor is worn to locate the inner ring side of second magnetic core and third magnetic core.

Further, the first magnetic core and the second magnetic core are disposed at inner ring side positions of the third magnetic core.

Further, the first magnetic core and the second magnetic core are nested and tightly fitted in an inner ring side position of the third magnetic core.

Further, the first magnetic core, the second magnetic core and the third magnetic core are axially arranged in parallel, and the third magnetic core is arranged at the front side or the rear side of the first magnetic core and the second magnetic core in an abutting mode along the axial direction of the third magnetic core.

Further, the width L of the air gap is 0.05-5 mm.

Furthermore, the air gap is formed in the middle of the binding surface.

Further, the first magnetic core, the second magnetic core are made of high saturation magnetic flux density materials and/or the third magnetic core is made of high magnetic permeability materials.

Further, the first conductor and the second conductor are respectively a positive electrode conductor and a negative electrode conductor.

Further, the first magnetic core and the second magnetic core are identical in shape and magnetism.

Further, the first magnetic core and/or the second magnetic core and/or the third magnetic core are cut to form a butt joint structure by taking the air gap as a reference.

The working principle of the invention is as follows:

a common mode circuit: when the current contains the common-mode interference signal, the common-mode interference signal is blocked or filtered outside the current source due to the high impedance capability of the third magnetic core, so that the interference of the electric equipment is prevented.

A differential mode circuit: when current flows into and flows out of the first magnetic core and the second magnetic core from the current source to the electric equipment through the first conductor and the second conductor, differential mode signals are contained in the current or the current is not constant when the input current is larger than the output current due to electric leakage of the electric equipment, so that differential mode current is formed, the differential mode magnetic core is formed by combining the first magnetic core and the second magnetic core, and an air gap is formed, so that the differential mode magnetic core has the characteristic of anti-saturation capacity with high saturation magnetic flux density value, and the differential mode interference signals are filtered outside the current source in a resistance mode, so that the electric equipment is prevented from being interfered.

Drawings

Fig. 1 is a schematic perspective view of a medium-difference common-mode integrated magnetic core according to an embodiment of the present invention;

fig. 2 is a schematic front view of a differential-mode and common-mode integrated magnetic core according to an embodiment of the invention;

fig. 3 is a schematic front view of a differential-mode and common-mode integrated magnetic core according to a second embodiment of the present invention;

fig. 4 is a schematic front structural view of a differential-mode and common-mode integrated magnetic core according to a third embodiment of the present invention;

fig. 5 is a schematic side view of a differential-mode and common-mode integrated magnetic core according to a third embodiment of the present invention;

fig. 6 is a schematic front view of a differential-mode and common-mode integrated magnetic core according to a fourth embodiment of the present invention;

fig. 7 is a schematic side view of a differential-mode and common-mode integrated magnetic core according to a fourth embodiment of the invention.

Description of reference numerals: 1. a first magnetic core; 2. a second magnetic core; 3. a third magnetic core; 4. a first conductor; 5. a second conductor; 6. a binding face; 7. an air gap; 8. a first upper magnetic core; 9. a first lower magnetic core; 10. a second upper magnetic core; 11. a second lower magnetic core; 12. a third upper magnetic core; 13. and a third lower magnetic core.

Detailed Description

In order to make the technical solution, the purpose and the advantages of the present invention more apparent, the present invention will be further explained with reference to the accompanying drawings and embodiments.

The first embodiment is as follows:

as shown in fig. 1-2, a differential-mode and common-mode integrated magnetic core includes a first magnetic core 1, a second magnetic core 2, a third magnetic core 3, a first conductor 4 and a second conductor 5, where the first magnetic core 1, the second magnetic core 2 and the third magnetic core 3 are all in an annular frame structure, a bonding surface 6 is formed by bonding one side of the first magnetic core 1 and one side of the second magnetic core 2 side by side, an air gap 7 is provided at a position of the first magnetic core 1 and the second magnetic core 2 corresponding to the bonding surface 6, the first conductor 4 is disposed on an inner ring side of the first magnetic core 1 and the third magnetic core 3, and the second conductor 5 is disposed on an inner ring side of the second magnetic core 2 and the third magnetic core 3. The first conductor 4 and the second conductor 6 are respectively a positive electrode conductor and a negative electrode conductor, and the specific materials of the first conductor 4 and the second conductor 5 are copper bars. The first magnetic core 1 and the second magnetic core 2 form a differential mode magnetic core, the third magnetic core 3 is a common mode magnetic core, and the first conductor 4 and the second conductor 5 form a current loop.

First magnetic core 1, second magnetic core 2 are high saturation magnetic flux density material, specifically are iron-based amorphous magnetic core for the filtering difference mode noise avoids the magnetic core saturation, and first magnetic core 1, second magnetic core 2 can be the material that magnetism is different, also can be the same material of magnetism. The third magnetic core 3 is made of a high-magnetic-permeability material, specifically an iron-based nanocrystalline magnetic core, and is used for efficiently filtering out common-mode noise. The air gap 7 is formed in the middle of the binding surface 6 formed by the first magnetic core 1 and the second magnetic core 2, the width L of the air gap 7 is 0.05-5 mm, the direct current bias capability can be influenced by the size of the L, and the larger the L is, the lower the magnetic permeability of the differential mode magnetic core is, and the stronger the direct current bias capability is. Due to the arrangement of the air gap 7, the direct current resistance and the anti-interference performance of the differential mode magnetic core can be effectively improved.

In this embodiment, the first magnetic core 1 and the second magnetic core 2 have the same shape and magnetism, the first magnetic core 1 and the second magnetic core 2 are disposed at the inner ring side position of the third magnetic core 3, and the first magnetic core 1 and the second magnetic core 2 are nested and tightly fitted in the inner ring side position of the third magnetic core 3. When the structure is applied to a loop structure, the magnetic core is assembled before installation.

Example two:

as shown in fig. 3, the first core 1, the second core 2, and the third core 3 are cut with the air gap 7 as a reference to form a butt joint structure, so that the first core 1 is divided into a first upper core 8 and a first lower core 9, the second core 2 is divided into a second upper core 10 and a second lower core 11, and the third core 3 is divided into a third upper core 12 and a third lower core 13, and the remaining structure is the same as that of the first embodiment. During the assembly, the butt joint is accomplished to the incision terminal surface of 8 magnetic cores on the first and the incision terminal surface of 9 magnetic cores under first and is formed the first magnetic core that is annular frame structure, the butt joint is accomplished to the incision terminal surface of 10 magnetic cores on the second and the incision terminal surface of 11 magnetic cores under the second and is formed the second magnetic core that is annular frame structure, the butt joint is accomplished to the incision terminal surface of 12 magnetic cores on the third and the incision terminal surface of 13 magnetic cores under the third and is formed the third magnetic core that is annular frame structure, later stage assembly when the structure of this embodiment can be applied to the mantle line structure, can be with the coil assembly good earlier, first magnetic core 1 of reassembling, second magnetic core 2, third magnetic core 3, the mounting means of this structure is more nimb.

Example three:

as shown in fig. 4-5, the first magnetic core 1, the second magnetic core 2, and the third magnetic core 3 are axially disposed in parallel, and the third magnetic core 3 is disposed at the rear side of the first magnetic core 1 and the second magnetic core 2 in an abutting and close-fitting manner along the axial direction thereof, and the rest of the structure is the same as that of the first embodiment. When the structure is applied to a loop structure, the magnetic core is assembled before installation. The structure makes the structural arrangement between the differential mode magnetic core and the common mode magnetic core have one more choice, and is suitable for the installation requirements of different customers

Example four:

as shown in fig. 6 to 7, the present embodiment is different from the third embodiment in that the first magnetic core 1, the second magnetic core 2, and the third magnetic core 3 are cut to form a butt joint structure with reference to the air gap 7, specifically, the first magnetic core 1 is divided into a first upper magnetic core 8 and a first lower magnetic core 9, the second magnetic core 2 is divided into a second upper magnetic core 10 and a second lower magnetic core 11, and the third magnetic core 3 is divided into a third upper magnetic core 12 and a third lower magnetic core 13, and the rest of the structure is the same as that of the third embodiment. During the assembly, the butt joint is accomplished to the incision terminal surface of 8 magnetic cores on the first and 9 magnetic cores's of first magnetic core's 9 incision terminal surface and the first magnetic core 1 that is annular frame structure of butt joint formation down, the second magnetic core 2 that is annular frame structure of butt joint formation is accomplished to the incision terminal surface of 10 magnetic cores on the second and the incision terminal surface of 11 magnetic cores under the second, 12 magnetic cores's on the third incision terminal surface and 13 magnetic cores's under the third incision terminal surface of completion butt joint formation are annular frame structure's third magnetic core 3, later stage assembly when the structure of this embodiment can be applied to the cover line structure, can be with coil assembly good earlier, first magnetic core 1 of reassembling, second magnetic core 2, third magnetic core 3, the mounting means of this structure is more.

The working principle of the invention is as follows:

a common mode circuit: when the current flows into and flows out of the third magnetic core 3 from the current source to the electric equipment through the first conductor 4 and the second conductor 5, the third magnetic core 3 has high impedance characteristic due to high permeability characteristic, and when the current contains the common-mode interference signal, the common-mode interference signal is blocked or filtered outside the current source due to high impedance capability of the third magnetic core 3, so that the electric equipment is prevented from being interfered.

A differential mode circuit: when current flows into and flows out of the first magnetic core 1 and the second magnetic core 2 from a current source to electric equipment through the first conductor 4 and the second conductor 5, and when the current contains a differential mode signal or the input current is larger than the output current due to electric leakage of the electric equipment, the current is uneven to form a differential mode current, at the moment, the combination of the first magnetic core 1 and the second magnetic core 2 is the differential mode magnetic core and an air gap 7 is formed, so that the differential mode magnetic core has the characteristic of anti-saturation capacity of high saturation magnetic flux density value, and the differential mode interference signal is filtered outside the current source in a blocking way, so that the electric equipment is prevented from being interfered.

The above description is only a preferred embodiment of the present invention, and those skilled in the art may still modify the described embodiment without departing from the implementation principle of the present invention, and the corresponding modifications should also be regarded as the protection scope of the present invention.