CN210667963U - Common mode inductor with differential mode effect - Google Patents
Common mode inductor with differential mode effect Download PDFInfo
- Publication number
- CN210667963U CN210667963U CN201922020224.XU CN201922020224U CN210667963U CN 210667963 U CN210667963 U CN 210667963U CN 201922020224 U CN201922020224 U CN 201922020224U CN 210667963 U CN210667963 U CN 210667963U
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- magnetic
- magnetic core
- common mode
- main
- differential mode
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Abstract
The utility model discloses a common mode inductor with differential mode effect, which comprises a common mode inductor body, wherein the common mode inductor body comprises a main magnetic core, magnetic core coils are arranged at two ends of the main magnetic core, a magnetic sheet is arranged in the middle of the main magnetic core, and the magnetic sheet forms a magnetic shunt in the middle of the main magnetic core; two magnetic loops are formed on two sides of the main magnetic core in the common mode inductor body; one end of the magnetic sheet is fixedly connected with the middle part of the main magnetic core, and the other end of the magnetic sheet keeps a gap with the other side of the main magnetic core; the existing scheme has no magnetic shunt, the magnetic fields generated by the differential mode signals in the two coils are equal in size and opposite in direction, and the magnetic fields are mutually offset, so that the differential mode signals cannot be filtered by a product; the utility model discloses added the magnetism branch way at the main magnetic core, the produced magnetic field of differential mode signal in two coils is the same in the magnetism branch way, can produce impedance and reach and eliminate differential mode interference.
Description
Technical Field
The utility model relates to the technical field of inductance, specifically a from common mode inductance who takes differential mode effect.
Background
An inductor (an inductance coil) is an electromagnetic induction element formed by winding an insulated wire (e.g., an enameled wire, a covered wire, etc.), and is also one of the components commonly used in electronic circuits. The inductance is a group of coaxial wire turns connected in series which are wound on an insulating framework or a magnetic core or an iron core by enameled wires, yarn-covered wires or plastic covered wires and the like, is represented by a letter L in a circuit, and mainly has the main function of isolating and filtering alternating current signals or forming a resonant circuit with a capacitor, a resistor and the like; common mode inductor (Common mode choke), also called Common mode choke, is commonly used in a switching power supply of a computer to filter Common mode electromagnetic interference signals. In the design of the board card, 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;
the existing common-mode inductor can only eliminate common-mode interference in a circuit and cannot eliminate differential-mode interference, so that the inventor provides the common-mode inductor with the differential-mode effect by combining various factors.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a common mode inductor with differential mode effect, which has the performance of eliminating differential mode interference; to solve the problems set forth in the background art described above.
In order to achieve the above object, the utility model provides a following technical scheme:
a common mode inductor with a differential mode effect comprises a common mode inductor body, wherein the common mode inductor body comprises a main magnetic core, magnetic core coils are arranged at two ends of the main magnetic core, a magnetic sheet is arranged in the middle of the main magnetic core, and the magnetic sheet forms a magnetic shunt in the middle of the main magnetic core; two magnetic loops are formed on two sides of the main magnetic core in the common mode inductor body; when a differential mode interference signal exists in the circuit, a part of magnetic fields generated by the differential mode interference signal in the two magnetic core coils enters the magnetic shunt, and the two magnetic fields have the same direction and are mutually superposed; the magnetic field in the magnetic shunt creates an impedance to cancel the differential mode interference model.
As a further aspect of the present invention: one end of the magnetic sheet is fixedly connected with the middle part of the main magnetic core, and the other end of the magnetic sheet keeps a gap with the other side of the main magnetic core.
Compared with the prior art, the utility model discloses the beneficial effect of following several aspects has:
the existing scheme has no magnetic shunt, the magnetic fields generated by the differential mode signals in the two coils are equal in size and opposite in direction, and the magnetic fields are mutually offset, so that the differential mode signals cannot be filtered by a product; the utility model discloses added the magnetism branch way at the main magnetic core, the produced magnetic field of differential mode signal in two coils is the same in the magnetism branch way, can produce impedance and reach and eliminate differential mode interference.
Drawings
Fig. 1 is a schematic structural diagram of a common mode inductor with a differential mode effect.
In the figure: 1. a main magnetic core; 2. a magnetic sheet; 3. a magnetic core coil; 4. a magnetic circuit.
Detailed Description
The technical solution of the present patent will be described in further detail with reference to the following embodiments.
Referring to fig. 1, a common mode inductor with a differential mode effect includes a common mode inductor body, the common mode inductor body includes a main magnetic core 1, two ends of the main magnetic core 1 are provided with magnetic core coils 3, a magnetic sheet 2 is arranged in the middle of the main magnetic core 1, and the magnetic sheet 2 forms a magnetic shunt in the middle of the main magnetic core 1; two magnetic loops 4 are formed at two sides of the main magnetic core 1 in the common mode inductor body; when a differential mode interference signal exists in the circuit, a part of magnetic fields generated by the differential mode interference signal in the two magnetic core coils enters the magnetic shunt, and the two magnetic fields have the same direction and are mutually superposed; the magnetic field in the magnetic shunt creates an impedance to cancel the differential mode interference model.
One end of the magnetic sheet 2 is fixedly connected with the middle part of the main magnetic core 1, and the other end of the magnetic sheet keeps a gap with the other side of the main magnetic core 1.
The utility model discloses the theory of operation: the existing scheme has no magnetic shunt, the magnetic fields generated by the differential mode signals in the two coils are equal in size and opposite in direction, and the magnetic fields are mutually offset, so that the differential mode signals cannot be filtered by a product; the utility model discloses added the magnetism branch way at the main magnetic core, the produced magnetic field of differential mode signal in two coils is the same in the magnetism branch way, can produce impedance and reach and eliminate differential mode interference.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art through specific situations.
Although the preferred embodiments of the present patent have been described in detail, the present patent is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present patent within the knowledge of those skilled in the art.
Claims (2)
1. A common mode inductor with a differential mode effect comprises a common mode inductor body, and is characterized in that the common mode inductor body comprises a main magnetic core (1), magnetic core coils (3) are arranged at two ends of the main magnetic core (1), a magnetic sheet (2) is arranged in the middle of the main magnetic core (1), and the magnetic sheet (2) forms a magnetic shunt in the middle of the main magnetic core (1); two magnetic loops (4) are formed at two sides of the main magnetic core (1) in the common mode inductor body.
2. A common mode inductor with differential effect as claimed in claim 1, wherein one end of the magnetic sheet (2) is fixedly connected to the middle of the main core (1), and the other end is spaced from the other side of the main core (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922020224.XU CN210667963U (en) | 2019-11-21 | 2019-11-21 | Common mode inductor with differential mode effect |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922020224.XU CN210667963U (en) | 2019-11-21 | 2019-11-21 | Common mode inductor with differential mode effect |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210667963U true CN210667963U (en) | 2020-06-02 |
Family
ID=70815531
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922020224.XU Expired - Fee Related CN210667963U (en) | 2019-11-21 | 2019-11-21 | Common mode inductor with differential mode effect |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210667963U (en) |
-
2019
- 2019-11-21 CN CN201922020224.XU patent/CN210667963U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20200602 Termination date: 20211121 |