CN201540797U - Novel common-mode inductor - Google Patents
Novel common-mode inductor Download PDFInfo
- Publication number
- CN201540797U CN201540797U CN2009202046803U CN200920204680U CN201540797U CN 201540797 U CN201540797 U CN 201540797U CN 2009202046803 U CN2009202046803 U CN 2009202046803U CN 200920204680 U CN200920204680 U CN 200920204680U CN 201540797 U CN201540797 U CN 201540797U
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- CN
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- Prior art keywords
- coiling group
- winding
- common mode
- conducting ring
- magnetic conducting
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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- 238000004804 winding Methods 0.000 claims abstract description 14
- 238000010586 diagram Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000005855 radiation Effects 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000002401 inhibitory effect Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
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Abstract
The utility model discloses a novel common-mode inductor, which comprises a closed magnetic conducting ring, wherein a first winding and at least one second winding are arranged on the magnetic conducting ring, and the first winding and the second winding are identical in length and distributed on the magnetic conducting ring uniformly. The secondary windings in odd number are arranged on the magnetic conducting ring, and the first winding and the at least one second winding are uniformly distributed on the magnetic conducting ring. Compared with the prior art, the novel common-mode inductor can effectively restrain generation of common-mode signals, improve electric characteristics of circuits utilizing the inductor, reduce EMI interference generated by electronic product better and decrease electromagnetic pollution to environments.
Description
Technical field
The utility model relates to the inductance field, particularly a kind of novel common mode inductance that can suppress common mode information.
Background technology
In electronic circuit technology, particularly in the Switching Power Supply, common mode inductance (Common mode Choke) often need be set be used to filter the electromagnetic interference signal of common mode, described common mode inductance is also referred to as common mode choke.Because the existence of common-mode signal has a negative impact to circuit signal, therefore need suppress common-mode signal, improve the circuit electrical characteristic.
Existing common mode inductance as shown in Figure 1, one section enamelled wire of coiling on the iron core of closure makes described enamelled wire two ends be positioned at same position.As shown in Figure 2, this common mode inductance is when the 30MHz frequency, and the detection surplus is 8.16dB, in 83MHz test point 5.49dB electromagnetic interference parameter.Though this kind winding structure can play certain inhibitory action to common-mode signal, it is bad to suppress effect.
The utility model content
The technical problem that the utility model mainly solves provides a kind of novel common mode inductance, and described novel common mode inductance can effectively suppress the generation of common-mode signal, improves the circuit electrical characteristic of using this inductance.
In order to address the above problem, the utility model provides a kind of novel common mode inductance, this common mode inductance comprises closed magnetic guiding cycle, on this magnetic guiding cycle, be provided with the first coiling group, also be provided with at least one second coiling group on the described magnetic guiding cycle, the described first coiling group is identical with the winding length of at least one second coiling group, and is evenly distributed on this magnetic guiding cycle.
Preferably, when described at least one second coiling group is one group, described at least one second coiling group and the described first coiling group symmetry, and described at least one second coiling group is relative with the direction of winding of the first coiling group.
The utility model common mode inductance, owing to also be provided with at least one second coiling group on described magnetic guiding cycle, the described first coiling group and at least one second coiling group are evenly distributed on this magnetic guiding cycle.Compared with prior art, can effectively suppress the generation of common-mode signal, improve the circuit electrical characteristic of using this inductance, can better reduce the EMI interference that electronic product produces, reduce the electromagnetic pollution of environment.
Description of drawings
Fig. 1 is this existing common mode inductance structural representation;
Fig. 2 is the test schematic diagram that this existing common mode inductance suppresses radiation;
Fig. 3 is the utility model common mode inductance example structure schematic diagram;
Fig. 4 is the test schematic diagram that the utility model common mode inductance embodiment suppresses radiation.
Below in conjunction with embodiment, and with reference to accompanying drawing, realization, functional characteristics and the advantage of the utility model purpose is described further.
Embodiment
As shown in Figure 3, the utility model provides a kind of novel common mode inductance embodiment.
Described common mode inductance comprises closed magnetic guiding cycle 1, in this magnetic guiding cycle 1, be provided with dividing plate 2, the magnetic guiding cycle 1 of described dividing plate 2 both sides is provided with the first coiling group 3, also be provided with the second at least one coiling group 4 on the described magnetic guiding cycle 1, the described first coiling group 3 is identical with the winding length of at least one second coiling group 4, and is evenly distributed on this magnetic guiding cycle 1.
Specifically, when described at least one second coiling group 4 is one group, described at least one second coiling group 4 is symmetrical arranged with the described first coiling group 3, described at least one second coiling group 4 is relative with the direction of winding of the first coiling group 3, be that described at least one second coiling group 4 winds the line in the direction of the clock, the described first coiling group 3 is by coiling counterclockwise, and the coiling position is relative.
When described at least one second coiling group 4. is two groups, two the second coiling groups and the first coiling group 4 evenly are arranged on the coiling group that is oppositely arranged on the described magnetic guiding cycle 1, wherein the first coiling group 3 winds the line in the direction of the clock, and at least one second coiling group 4 is by coiling counterclockwise.
The quantity of described at least one second coiling group 4 can be provided with as required, can be made as one, two or more, and the quantity of its at least one second coiling group 4 is many more, and then the EMI effect is good more.
As shown in Figure 4, when described at least one second coiling group 4 is one group, and in same circuit, (EMI is poor more for the high more explanation of numerical value) that described common mode inductance 30MHZ frequency in the 30M-1000MHZ frequency range is the poorest, adopting the existing detected surplus of common mode inductance is 8.16dB, adopting the detected surplus of the utility model common mode inductance is 5.74dB, has reduced the 2.42dB electromagnetic interference than the common mode inductance of existing structure.
(EMI is poor more for the high more explanation of numerical value) that described common mode inductance 83MHZ frequency in the 30M-1000MHZ frequency range is the poorest, adopting the existing detected surplus of common mode inductance is 5.49dB, adopting the detected surplus of the utility model common mode inductance is 1.61dB, has reduced the 3.88dB electromagnetic interference than the common mode inductance of existing structure.
The utility model common mode inductance, owing to also be provided with at least one second coiling group 4 on described magnetic guiding cycle 1, the described first coiling group 3 and at least one second coiling group 4 are evenly distributed on this magnetic guiding cycle.Compared with prior art, can effectively suppress the generation of common-mode signal, improve the circuit electrical characteristic of using this inductance, can better reduce the EMI interference that electronic product produces, reduce the electromagnetic pollution of environment.
The above only is a preferred embodiment of the present utility model; be not so limit claim of the present utility model; every equivalent structure or equivalent flow process conversion that utilizes the utility model specification and accompanying drawing content to be done; or directly or indirectly be used in other relevant technical fields, all in like manner be included in the scope of patent protection of the present utility model.
Claims (2)
1. novel common mode inductance comprises closed magnetic guiding cycle, is provided with the first coiling group on this magnetic guiding cycle, it is characterized in that:
Also be provided with at least one second coiling group on the described magnetic guiding cycle, the described first coiling group is identical with the winding length of at least one second coiling group, and is evenly distributed on this magnetic guiding cycle.
2. according to the described novel common mode inductance of claim 1, it is characterized in that:
When described at least one second coiling group is one group, described at least one second coiling group and the described first coiling group symmetry, and described at least one second coiling group is relative with the direction of winding of the first coiling group.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202046803U CN201540797U (en) | 2009-09-16 | 2009-09-16 | Novel common-mode inductor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202046803U CN201540797U (en) | 2009-09-16 | 2009-09-16 | Novel common-mode inductor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201540797U true CN201540797U (en) | 2010-08-04 |
Family
ID=42592254
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009202046803U Expired - Fee Related CN201540797U (en) | 2009-09-16 | 2009-09-16 | Novel common-mode inductor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201540797U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102842410A (en) * | 2012-09-18 | 2012-12-26 | 无锡晶磊电子有限公司 | Butterfly type wire winding structure of common mode inductor |
-
2009
- 2009-09-16 CN CN2009202046803U patent/CN201540797U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102842410A (en) * | 2012-09-18 | 2012-12-26 | 无锡晶磊电子有限公司 | Butterfly type wire winding structure of common mode inductor |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: SHENZHEN NALIN TECHNOLOGY CO., LTD. Free format text: FORMER OWNER: XIE DAOPING Effective date: 20101109 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20101109 Address after: Two building, two floor, Li Langping, Li Dadao, Teng Chau Industrial Park, Buji, Longgang District, Guangdong, Shenzhen 518000 Patentee after: SHENZHEN NALIN TECHNOLOGY CO., LTD. Address before: Two building, two floor, Li Langping, Li Dadao, Teng Chau Industrial Park, Buji, Longgang District, Guangdong, Shenzhen 518000 Patentee before: Xie Daoping |
|
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100804 Termination date: 20150916 |
|
| EXPY | Termination of patent right or utility model |