CN202584976U - Magnetic core - Google Patents
Magnetic core Download PDFInfo
- Publication number
- CN202584976U CN202584976U CN 201120338267 CN201120338267U CN202584976U CN 202584976 U CN202584976 U CN 202584976U CN 201120338267 CN201120338267 CN 201120338267 CN 201120338267 U CN201120338267 U CN 201120338267U CN 202584976 U CN202584976 U CN 202584976U
- Authority
- CN
- China
- Prior art keywords
- layer
- magnetic core
- ferrite
- alloy material
- material layer
- Prior art date
- 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 - Lifetime
Links
Images
Landscapes
- Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)
- Coils Or Transformers For Communication (AREA)
- Soft Magnetic Materials (AREA)
Abstract
The utility model relates to a magnetic core for preventing electromagnetic interference. The utility model provides the magnetic core with the filter effect not affected by frequencies. The magnetic core is a combination body of an alloy material layer and a ferrite layer, and at least one layer of the combination body of the alloy material layer and the ferrite layer is arranged. As the combination body of the alloy material layer and the ferrite layer, the magnetic core integrates the advantage of good low frequency filter effect of an alloy magnetic core with high magnetic conductivity and the advantage of good medium-high frequency filter effect of a ferrite magnetic core with the magnetic conductivity much lower than that of the alloy magnetic core, thereby achieving relatively good filter effects for high, medium and low frequencies in EMI filter.
Description
Technical field
The utility model relates to a kind of magnetic core, specifically, relates to the magnetic core that a kind of anti-electromagnetic interference is used.
Background technology
At present, adopt following two kinds in that the magnetic core that filters the common mode inductance that the EMI common mode disturbances uses is general: alloy magnetic core and FERRITE CORE.In EMI filtered, the alloy magnetic core was high because of its magnetic permeability, and in the low frequency good filtration effect, still along with the rising of frequency, its inductance value decay is rapid, almost not effect in middle and high frequency; The relative alloy magnetic core of the magnetic permeability of FERRITE CORE is much lower, so inductance coefficent system is little with the frequency change influence, and filter effect is bad when low frequency, but in middle and high frequency good filtration effect.In EMI filtered, these two kinds of magnetic core filter effects all received frequency influence.
Summary of the invention
The technical problem that the utility model will solve is to overcome above defective, provides a kind of filter effect not receive the magnetic core of frequency influence.
The magnetic core technical scheme of the utility model is such: said magnetic core is alloy material layer and ferrite layer assembly, and alloy material layer and ferrite layer assembly are provided with one deck at least.
Alloy material layer is set to ultracrystallite nanometer crystal layer or cobalt base amorphous layer or Fe-based amorphous layer or permalloy layer.
Ferrite is set to manganese-zinc ferrite layer or nickel-zinc ferrite layer.
Alloy material layer is set to band or powder bed.
Said magnetic core is provided with two-layer, and nexine is provided with alloy material layer, ferrite layer is set skin or nexine is provided with ferrite layer, skin is provided with alloy material layer.
Ferrite is set to hollow shape, and alloy material is arranged in the ferrite layer.
Alloy material layer is set to Powdered mixing simultaneously with ferrite powder and fires.
Alloy material layer is set to two or more alloy material band coiling and molding.
Magnetic core is provided with three layers, inside and outside two-layer ferrite, the centre is an alloy material.
Two-layer alloy material inside and outside magnetic core is provided with three layers, middle ferrite.
Beneficial effect: in EMI filters; Because magnetic core is alloy material layer and ferrite combination body; Alloy magnetic core magnetic permeability is high, and in the low frequency good filtration effect, the relative alloy magnetic core of the magnetic permeability of FERRITE CORE is much lower; The high frequency good filtration effect makes the filter effect of magnetic core at high, medium and low frequency reasonable filter effect arranged all.
Description of drawings
Fig. 1 is first kind of a kind of sectional elevation of execution mode of the utility model magnetic core.
Fig. 2 is the another kind of sectional elevation of first kind of execution mode of the utility model magnetic core.
Fig. 3 is second kind of a kind of sectional elevation of execution mode of the utility model magnetic core.
Fig. 4 is the another kind of sectional elevation of second kind of execution mode of the utility model magnetic core.
Fig. 5 is a kind of sectional elevation of the third execution mode of the utility model magnetic core.
Fig. 6 is the another kind of sectional elevation of the third execution mode of the utility model magnetic core.
Fig. 7 is the 4th kind of a kind of sectional elevation of execution mode of the utility model magnetic core.
Fig. 8 is the another kind of sectional elevation of the 4th kind of execution mode of the utility model magnetic core.
Fig. 9 is a kind of sectional elevation of winding method of the alloy-layer of the utility model magnetic core.
1-alloy material layer, 2-ferrite layer, 3-amalgam layer.
Embodiment
Embodiment 1:
Fig. 1 and Fig. 2 have provided first execution mode of the utility model, and magnetic core is arranged to hollow shape, and it comprises one deck alloy material layer 1 and one deck ferrite layer 2.Said alloy material layer 1 is set to ultracrystallite nanometer crystal layer or cobalt base amorphous layer or Fe-based amorphous layer or permalloy layer, and alloy material layer 1 can be set to band or powder bed, and said ferrite layer 2 is set to manganese-zinc ferrite layer or nickel-zinc ferrite layer.Said magnetic core can be as shown in Figure 1, and the magnetic core nexine is provided with alloy material layer 1, skin is provided with ferrite layer 2; Also can be as shown in Figure 2, the magnetic core nexine is provided with ferrite layer 2, skin is provided with alloy material layer 1.Because the common mode inductance magnetic core is alloy material layer and ferrite combination body, in the EMI common mode disturbances is filtered, when low-frequency range,, can obtain better filter effect in low-frequency range because of alloy material 1 magnetic permeability is high; In the middle of, during high band; Though the decay of superalloy material layer 1 inductance value rapidly; In the almost not effect of middle and high frequency range; But the relative alloy material layer of the magnetic permeability of ferrite layer 21 is much lower, and its inductance coefficent value is little with the frequency change influence, can obtain better filter effect equally in middle and high frequency range.Because the magnetic core of common mode inductance is alloy material layer and ferrite combination body, disturb in the whole frequency band of filtration at EMI, all obtain better filter effect, solve the problem that filter effect receives frequency influence.
Fig. 3 and Fig. 4 have provided second execution mode of the utility model, and magnetic core is arranged to hollow shape, and said magnetic core can as shown in Figure 3ly comprise two-layer alloy material layer 1 and one deck ferrite layer 2, and ferrite layer 2 is arranged in the middle of the two-layer alloy material layer 1; Also can as shown in Figure 4ly comprise one deck alloy material layer 1 and two-layer ferrite layer 2, alloy material layer 1 is filled in the middle of the two-layer ferrite layer 2.Said alloy material layer 1 is set to ultracrystallite nanometer crystal layer or cobalt base amorphous layer or Fe-based amorphous layer or permalloy layer, and alloy material layer 1 can be set to band or powder bed, and said ferrite layer 2 is set to manganese-zinc ferrite layer or nickel-zinc ferrite layer.Because the common mode inductance magnetic core is alloy material and ferrite combination body, in the EMI common mode disturbances is filtered, when low-frequency range,, can obtain better filter effect in low-frequency range because of superalloy material layer 1 magnetic permeability is high; In the middle of, during high band; Though the decay of alloy material layer 1 inductance value rapidly; In the almost not effect of middle and high frequency range; But the relative alloy material layer of the magnetic permeability of ferrite layer 21 is much lower, and its inductance coefficent value is little with the frequency change influence, can obtain better filter effect equally in middle and high frequency range.Because magnetic core is alloy material layer and ferrite combination body, disturb in the whole frequency band of filtration at EMI, all obtain better filter effect, solve the problem that filter effect receives frequency influence.
Fig. 5 and Fig. 6 figure have provided the 3rd execution mode of the utility model, and said magnetic core is as 5 and shown in Figure 6, and magnetic core is arranged to hollow shape, and it comprises alloy-layer 1 and one deck ferrite layer 2, and alloy material layer 1 is filled in the ferrite layer 2.Alloy-layer 1 can be as shown in Figure 5 semiclosed by ferrite layer 2, also can be as shown in Figure 6 totally-enclosed by ferrite layer 2.Said alloy material layer 1 is set to ultracrystallite nanometer crystal layer or cobalt base amorphous layer or Fe-based amorphous layer or permalloy layer, and alloy material layer 1 can be set to band or powder bed, and said ferrite layer 2 is set to manganese-zinc ferrite layer or nickel-zinc ferrite layer.Because the common mode inductance magnetic core is alloy magnetic core and ferrite body assembly, in the EMI common mode disturbances is filtered, when low-frequency range,, can obtain better filter effect in low-frequency range because of alloy-layer 1 magnetic permeability is high; In the middle of, during high band; Though alloy material layer 1 inductance value decay rapidly, in the almost not effect of middle and high frequency range, the relative alloy-layer of the magnetic permeability of ferrite layer 21 is much lower; Its inductance coefficent value is little with the frequency change influence, can obtain better filter effect equally in middle and high frequency range.Because the magnetic core of common mode inductance is alloy material layer and ferrite body assembly, disturb in the whole frequency band of filtration at EMI, all obtain better filter effect, solve the problem that filter effect receives frequency influence.
Embodiment 4
Fig. 7 and Fig. 8 have provided the 4th execution mode of the utility model, and magnetic core is arranged to hollow shape, and as shown in Figure 7 it comprises one deck alloy material layer 1 and one deck ferrite layer 2, and alloy material layer 1 is stacked on the ferrite layer 2; Also can become layer of mixing body 3 to be arranged in the magnetic core with the ferrite powder mixed sintering by alloy powder as shown in Figure 8.Said alloy material layer 1 is set to ultracrystallite nanometer crystal layer or cobalt base amorphous layer or Fe-based amorphous layer or permalloy layer, and alloy material layer 1 can be set to band or powder bed or be illustrated in figure 9 as two or more alloy material band coiling and molding.Said ferrite layer 2 is set to manganese-zinc ferrite layer or nickel-zinc ferrite layer.Because the common mode inductance magnetic core is alloy material layer and ferrite body assembly, in the EMI common mode disturbances is filtered, when low-frequency range,, can obtain better filter effect in low-frequency range because of alloy-layer 1 magnetic permeability is high; In the middle of, during high band; Though alloy-layer 1 inductance value decay rapidly, in the almost not effect of middle and high frequency range, the relative alloy-layer of the magnetic permeability of ferrite layer 21 is much lower; Its inductance coefficent value is little with the frequency change influence, can obtain better filter effect equally in middle and high frequency range.Because the magnetic core of common mode inductance is alloy material layer and ferrite body assembly, disturb in the whole frequency band of filtration at EMI, all obtain better filter effect, solve the problem that filter effect receives frequency influence.
Claims (9)
1. magnetic core, it is characterized in that: said magnetic core is alloy material layer and ferrite layer assembly, and alloy material layer and ferrite layer assembly are provided with one deck at least.
2. magnetic core as claimed in claim 1 is characterized in that: alloy material layer is set to ultracrystallite nanometer crystal layer or cobalt base amorphous layer or Fe-based amorphous layer or permalloy layer.
3. magnetic core as claimed in claim 1 is characterized in that: ferrite is set to manganese-zinc ferrite layer or nickel-zinc ferrite layer.
4. magnetic core as claimed in claim 1 is characterized in that: alloy material layer is set to band or powder bed.
5. magnetic core as claimed in claim 1 is characterized in that: said magnetic core is provided with two-layer, and nexine is provided with alloy material layer, ferrite layer is set skin or nexine is provided with ferrite layer, skin is provided with alloy material layer.
6. magnetic core as claimed in claim 1, it is characterized in that: ferrite is set to hollow shape, and alloy material is arranged in the ferrite layer.
7. magnetic core as claimed in claim 1 is characterized in that: alloy material layer is set to two or more alloy material band coiling and molding.
8. magnetic core as claimed in claim 1 is characterized in that: magnetic core is provided with three layers, inside and outside two-layer ferrite, the centre is an alloy material.
9. magnetic core as claimed in claim 1 is characterized in that: magnetic core is provided with three layers, inside and outside two-layer alloy material, middle ferrite.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120338267 CN202584976U (en) | 2011-09-09 | 2011-09-09 | Magnetic core |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120338267 CN202584976U (en) | 2011-09-09 | 2011-09-09 | Magnetic core |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202584976U true CN202584976U (en) | 2012-12-05 |
Family
ID=47254363
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201120338267 Expired - Lifetime CN202584976U (en) | 2011-09-09 | 2011-09-09 | Magnetic core |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202584976U (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103440965A (en) * | 2013-08-14 | 2013-12-11 | 昆山达功电子有限公司 | Transformer magnetic core |
| CN103474196A (en) * | 2013-08-28 | 2013-12-25 | 昆山佑翔电子科技有限公司 | Combined magnetic ring |
| CN105788800A (en) * | 2016-03-08 | 2016-07-20 | 佛山市程显科技有限公司 | Magnetic core structure fabricated by employing material additive manufacturing technology and application of magnetic core structure |
| CN107023703A (en) * | 2016-01-29 | 2017-08-08 | 盾安环境技术有限公司 | Magnetic valve |
| KR20180071824A (en) * | 2016-12-20 | 2018-06-28 | 엘지이노텍 주식회사 | Magnetic core and coil component |
| CN108987062A (en) * | 2018-07-05 | 2018-12-11 | 浙江大学 | A kind of ferrite-magnetically soft alloy composite cores and preparation method thereof |
| CN110114846A (en) * | 2016-12-20 | 2019-08-09 | Lg伊诺特有限公司 | Magnetic core, coil block and the electronic building brick including coil block |
-
2011
- 2011-09-09 CN CN 201120338267 patent/CN202584976U/en not_active Expired - Lifetime
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103440965A (en) * | 2013-08-14 | 2013-12-11 | 昆山达功电子有限公司 | Transformer magnetic core |
| CN103474196A (en) * | 2013-08-28 | 2013-12-25 | 昆山佑翔电子科技有限公司 | Combined magnetic ring |
| CN107023703A (en) * | 2016-01-29 | 2017-08-08 | 盾安环境技术有限公司 | Magnetic valve |
| CN105788800A (en) * | 2016-03-08 | 2016-07-20 | 佛山市程显科技有限公司 | Magnetic core structure fabricated by employing material additive manufacturing technology and application of magnetic core structure |
| CN105788800B (en) * | 2016-03-08 | 2017-09-12 | 佛山市程显科技有限公司 | Core structure and its application prepared by a kind of use increases material manufacturing technology |
| KR20180071824A (en) * | 2016-12-20 | 2018-06-28 | 엘지이노텍 주식회사 | Magnetic core and coil component |
| CN110114846A (en) * | 2016-12-20 | 2019-08-09 | Lg伊诺特有限公司 | Magnetic core, coil block and the electronic building brick including coil block |
| CN110114846B (en) * | 2016-12-20 | 2022-03-29 | Lg伊诺特有限公司 | Magnetic core, coil assembly and electronic assembly including coil assembly |
| US11482369B2 (en) | 2016-12-20 | 2022-10-25 | Lg Innotek Co., Ltd. | Magnetic core, coil component, and electronic component including same |
| KR102669398B1 (en) * | 2016-12-20 | 2024-05-28 | 엘지이노텍 주식회사 | Magnetic core and coil component |
| CN108987062A (en) * | 2018-07-05 | 2018-12-11 | 浙江大学 | A kind of ferrite-magnetically soft alloy composite cores and preparation method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN202584976U (en) | Magnetic core | |
| CN202839232U (en) | Magnetic core and magnetic element | |
| CN100458988C (en) | Choke coil and its embedded iron core | |
| CN1391334A (en) | Differential mode and common mode integrated filter | |
| CN204651136U (en) | The loop construction of tool common mode filtering or inductance effect | |
| CN206532684U (en) | The induction structure of CP values can be reduced | |
| CN108780693B (en) | Magnetic element | |
| CN202258647U (en) | Common mode choke | |
| CN202473527U (en) | A magnetic component | |
| CN203396828U (en) | Current sensor based on planar Rogowski coil | |
| CN202352466U (en) | Inductance core and inductor | |
| CN205303125U (en) | Telescopic EEI makes up magnetic core | |
| CN206163269U (en) | High -power PFC common mode inductance | |
| CN204155715U (en) | A kind of core structure and there is the reactor of this core structure | |
| CN107749345A (en) | The preparation method of SMD inductance core | |
| CN201508742U (en) | Common mode filter | |
| CN203690040U (en) | Amorphous common-mode inductor | |
| CN208422613U (en) | A kind of digital power amplifier inductance | |
| CN203895230U (en) | Novel UUI magnetic core | |
| CN202210451U (en) | Common mode inductor | |
| CN203338915U (en) | Magnetic core structure for preventing electromagnetic interference | |
| CN203338916U (en) | Improved structure for 8-shaped magnetic core | |
| CN201780839U (en) | Integrated inductor based on differential-mode and common-mode filtering | |
| CN210182200U (en) | Assembled radio frequency transformer magnetic core structure | |
| CN211181912U (en) | EI type common-difference mode filter |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20121205 |