CN203858957U - Common mode inductor - Google Patents
Common mode inductor Download PDFInfo
- Publication number
- CN203858957U CN203858957U CN201420115909.7U CN201420115909U CN203858957U CN 203858957 U CN203858957 U CN 203858957U CN 201420115909 U CN201420115909 U CN 201420115909U CN 203858957 U CN203858957 U CN 203858957U
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- CN
- China
- Prior art keywords
- common mode
- air gap
- pair
- gap sheet
- mode inductance
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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.)
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- 230000000994 depressed Effects 0.000 claims description 6
- 241001061264 Astragalus Species 0.000 claims description 3
- 238000004804 winding Methods 0.000 claims description 3
- 238000001746 injection moulding Methods 0.000 abstract description 3
- 210000002356 Skeleton Anatomy 0.000 abstract 6
- 238000010618 wire wrap Methods 0.000 abstract 6
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 6
- 230000000694 effects Effects 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 239000011162 core material Substances 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 1
- 229910000529 magnetic ferrite Inorganic materials 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000001629 suppression Effects 0.000 description 1
- 229910000859 α-Fe Inorganic materials 0.000 description 1
Abstract
The utility model relates to a common mode inductor. The common mode inductor comprises two groups of coils and a wire wrapping skeleton, wherein a concave part for embedding and fixing a magnet ring is arranged at the center of the wire wrapping skeleton, a square hole is formed in the center of the concave part, and limiting grooves are symmetrically arranged outside the edges of a pair of opposite sides of the square hole; a T-shaped air gap sheet is arranged at the center of the magnet ring, and the two ends of the top of the T-shaped air gap sheet are respectively embedded in the pair of limiting grooves. The wire wrapping skeleton can be produced through mold injection molding on a large scale, namely the dimensions of the wire wrapping skeleton are easily fixed, and the dimensions and positions of the square hole in the wire wrapping skeleton and the pair of limiting grooves are also easily fixed, so that the T-shaped air gap sheet is convenient to fix at the position on the wire wrapping skeleton. Therefore, the common mode inductor is convenient and fast to install, and the product quality is easily unified.
Description
Technical field
The utility model relates to a kind of common mode inductance.
Background technology
Two power lines disturb between over the ground and are common mode disturbances.Interference between two power lines is differential mode interference.
Suppress the filter inductance of common mode disturbances common mode inductance.Suppress the filter inductance of differential mode interference differential mode inductance.
Common mode inductance (Common mode Choke), is also common mode choke, is usually used in filtering in the Switching Power Supply of computer the electromagnetic interference signal of common mode.In board design, common mode inductance has been also the effect of EMI (electromagnetic interference) filtering, the electromagnetic wave outside radiation-emitting producing for suppressing HW High Way.
Common mode inductance be around the number of turns on same iron core equate, diameter of wire equates, around two groups of coils to contrary.The feature of common mode inductance is: due to two groups of coils on same iron core around on the contrary, so that iron core is not afraid of is saturated.Common core material is that height is led Ferrite Material.
Differential mode inductance is around a coil on an iron core.The feature of differential mode inductance is the occasion that is applied in large electric current.Due on an iron core around a coil, when flow to coil electric current increase time, the iron core in coil can be saturated.
In common mode inductance, in order to suppress differential mode interference, often need to an air gap sheet be set between two of common mode inductance group coil, to regulate the size of differential mode inductance.And the position of air gap sheet is difficult for fixing in prior art, and inconvenience is installed, causes product quality difficult unified.
Utility model content
It is easily fixing that technical problem to be solved in the utility model is to provide a kind of position of simple in structure, air gap sheet, and easily unified common mode inductance of convenient and product quality is installed.
In order to address the above problem, the utility model provides a kind of common mode inductance, comprise: two groups of coils, bobbin, the central authorities of this bobbin are provided with the depressed part for embedding and fix a magnet ring, the central authorities of this depressed part have square hole, and the outside, edge of a pair of opposite side of this square hole is arranged with stopper slot; The central authorities of magnet ring are provided with T shape air gap sheet, and the two ends, top of T shape air gap sheet embed respectively in described a pair of stopper slot.
Described magnet ring is square magnetic ring, coordinates to facilitate with described square hole, is convenient to coiling.
For ease of fixing described T shape air gap sheet, the two ends, top of described T shape air gap sheet respectively with described a pair of stopper slot tight fit.Further preferably, the two ends, top of T shape air gap sheet are adhesively fixed on respectively in described a pair of stopper slot.
As preferred embodiment, another of the square hole of described bobbin is arranged with multiple wrapping posts to the edge of opposite side, single group coil around in each astragal all winding on the side at described magnet ring and wrapping post place, to fix bobbin and square magnetic ring.
The utility model has positive effect with respect to prior art: (1) common mode inductance of the present utility model is simple in structure, the two ends, top of T shape air gap sheet embed respectively and are fixed in described a pair of stopper slot, and bobbin can pass through mold injection molding, mass production, the size that is bobbin is easily fixing, square hole on bobbin, the size of a pair of stopper slot, position are also easily fixing, and this is beneficial to the position of T shape air gap sheet on described bobbin fixed.Therefore, convenient and product quality is installed easily unified.(2) the MnZn material that air gap sheet material is PC40 or other conventional core materials, the coil in air gap sheet both sides on square magnetic ring and a differential mode inductance of air gap sheet composition, to regulate the size of differential mode inductance.
Brief description of the drawings
Below in conjunction with specific embodiment, the utility model is described in further detail:
Fig. 1 is the structural representation of common mode inductance of the present utility model;
Fig. 2 is the stereogram of described bobbin;
Fig. 3 is the stereogram of another angle of described bobbin;
Fig. 4 is the structural representation of described T shape air gap sheet;
Fig. 5 is the vertical view of Fig. 4;
Fig. 6 is the left view of Fig. 4.
Embodiment
See Fig. 1-6, the common mode inductance of the present embodiment, comprise: two groups of coils, bobbin 2, the central authorities of this bobbin 2 are provided with the depressed part 2-1 for embedding and fix a magnet ring 1, the central authorities of this depressed part 2-1 have square hole 2-4, and the outside, edge of a pair of opposite side of this square hole 2-4 is arranged with stopper slot 2-3; The central authorities of magnet ring 1 are provided with T shape air gap sheet 3, and the two ends, top of T shape air gap sheet 3 embed respectively in described a pair of stopper slot 2-3.
Described magnet ring 1 is square magnetic ring, coordinates to facilitate with described square hole, is convenient to coiling.
For ease of fixing described T shape air gap sheet 3, the two ends, top of described T shape air gap sheet respectively with described a pair of stopper slot tight fit, realize accurately location.Meanwhile, the two ends, top of T shape air gap sheet are adhesively fixed on respectively in described a pair of stopper slot 2-3.
As preferred embodiment, the edge of another of the square hole 2-4 of described bobbin 2 to opposite side is arranged with multiple wrapping post 2-2, single group coil around in each astragal all winding on the side at described magnet ring 1 and wrapping post 2-2 place, to fix bobbin 2 and square magnetic ring.
The utility model has positive effect with respect to prior art: 1 common mode inductance of the present utility model is simple in structure, the two ends, top of T shape air gap sheet embed respectively and are fixed in described a pair of stopper slot, and bobbin can pass through mold injection molding, mass production, the size that is bobbin is easily fixing, square hole on bobbin, the size of a pair of stopper slot, position are also easily fixing, and this is beneficial to the position of T shape air gap sheet on described bobbin fixed.Therefore, convenient and product quality is installed easily unified.
Obviously, above-described embodiment is only for the utility model example is clearly described, and is not the restriction to execution mode of the present utility model.For those of ordinary skill in the field, can also make other changes in different forms on the basis of the above description.Here without also giving exhaustive to all execution modes.And these belong to apparent variation that spirit of the present utility model extended out or variation still among protection range of the present utility model.
Claims (5)
1. a common mode inductance, comprise two groups of coils, characterized by further comprising: bobbin (2), the central authorities of this bobbin (2) are provided with the depressed part (2-1) for embedding and fix a magnet ring (1), the central authorities of this depressed part (2-1) have square hole (2-4), and the outside, edge of a pair of opposite side of this square hole (2-4) is arranged with stopper slot (2-3);
The central authorities of magnet ring (1) are provided with T shape air gap sheet (3), and the two ends, top of T shape air gap sheet (3) embed respectively in described a pair of stopper slot (2-3).
2. common mode inductance according to claim 1, is characterized in that: described magnet ring (1) is square magnetic ring.
3. common mode inductance according to claim 1, is characterized in that: the two ends, top of described T shape air gap sheet (3) are adhesively fixed on respectively in described a pair of stopper slot (2-3).
4. common mode inductance according to claim 1, is characterized in that: the two ends, top of described T shape air gap sheet respectively with described a pair of stopper slot tight fit.
5. according to the common mode inductance one of claim 1-3 Suo Shu, it is characterized in that: the edge of another of the square hole (2-4) of described bobbin (2) to opposite side is arranged with multiple wrapping posts (2-2), single group coil around in each astragal all winding on the side at described magnet ring (1) and wrapping post (2-2) place.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420115909.7U CN203858957U (en) | 2014-03-14 | 2014-03-14 | Common mode inductor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420115909.7U CN203858957U (en) | 2014-03-14 | 2014-03-14 | Common mode inductor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203858957U true CN203858957U (en) | 2014-10-01 |
Family
ID=51608799
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420115909.7U Active CN203858957U (en) | 2014-03-14 | 2014-03-14 | Common mode inductor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203858957U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108597830A (en) * | 2018-03-05 | 2018-09-28 | 海宁孚硕电源科技有限公司 | A kind of production method of common-mode inductor |
-
2014
- 2014-03-14 CN CN201420115909.7U patent/CN203858957U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108597830A (en) * | 2018-03-05 | 2018-09-28 | 海宁孚硕电源科技有限公司 | A kind of production method of common-mode inductor |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |