CN202275687U - Difference and common module integrated inductor and electromagnetic interference (EMI) filter - Google Patents
Difference and common module integrated inductor and electromagnetic interference (EMI) filter Download PDFInfo
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- CN202275687U CN202275687U CN2011203554754U CN201120355475U CN202275687U CN 202275687 U CN202275687 U CN 202275687U CN 2011203554754 U CN2011203554754 U CN 2011203554754U CN 201120355475 U CN201120355475 U CN 201120355475U CN 202275687 U CN202275687 U CN 202275687U
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- magnet ring
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- wire harness
- mode magnet
- differential mode
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Abstract
The utility model discloses a difference and common module integrated inductor and an electromagnetic interference (EMI) filter, wherein the difference and common module integrated inductor comprises a difference module magnetic ring, a common module magnetic ring and two sections of wire beams, one end surface of the difference module magnetic ring is opposite to one end surface of the common module magnetic ring, one wire beam is in a 0 shape in a single turn winding mode, the other wire beam is in an 8 shape in a single turn winding mode, and the two wire beams are respectively wound on the difference module magnetic ring and the common module magnetic ring. The difference and common module integrated inductor has the advantages that the size of the EMI filter is reduced, and simultaneously, the noise suppression capability of the EMI filer is improved.
Description
Technical field
The utility model relates to field of electrical components, specially refers to the poor common mode integrated inductor in a kind of EMI FILTER.
Background technology
At present; Any electronics, electric product; All must be at its power supply input/output terminal or signal port device EMI (Electro Magnetic Interference, electromagnetic interference) filter, to suppress Conducted Electromagnetic Interference; Make the electromagnetic interference that itself produces be unlikely to environment is polluted, also make electromagnetic interference be unlikely to influence its operate as normal from electromagnetic environment.
Existing electromagnetic interface filter structure, a kind of situation are that differential mode inductance and common mode inductance are independent separately, form through different magnet ring coilings respectively, and the electromagnetic interface filter of this structure, its volume is bigger, and it is more to take up room; Another kind of situation be in the electromagnetic interface filter without differential mode inductance, and only utilize the differential mode leakage inductance of common mode inductance to realize differential mode filtering, though its relative volume is less, it is relatively poor that differential mode noise suppresses ability.
The utility model content
The main purpose of the utility model is improved the electromagnetic interface filter noise inhibiting ability for a kind of poor common mode integrated inductor and electromagnetic interface filter are provided when being intended to reduce the electromagnetic interface filter volume.
The utility model provides a kind of poor common mode integrated inductor, comprises differential mode magnet ring, common mode magnet ring and two sections wire harness; An end face of said differential mode magnet ring is relative with an end face of said common mode magnet ring; One wire harness with the single turn canoe be " 0 " word shape, another wire harness with the single turn canoe for " 8 " word shape respectively symmetry be wrapped on said differential mode magnet ring and the common mode magnet ring.
Preferably, said two sections wire harness are top with same magnet ring, are wrapped in symmetrically and evenly respectively on differential mode magnet ring and the common mode magnet ring.
Preferably, the material of said differential mode magnet ring is ferrocart core or iron sial.
Preferably, said differential mode magnet ring is positioned at the below of said common mode magnet ring, and said two sections wire harness serve as the coiling initiating terminal with the differential mode magnet ring all, and the initiating terminal of two sections wire harness lays respectively at the heteropleural of differential mode magnet ring.
Preferably, said single turn is the wire harness of " 0 " word shape, is wrapped in the left half cycle of differential mode magnet ring and common mode magnet ring according to counterclockwise or clockwise direction; Said single turn is the wire harness of " 8 " word shape, is wrapped in the right half cycle of differential mode magnet ring and common mode magnet ring.
Preferably, said single turn is the wire harness of " 0 " word shape, is wrapped in differential mode magnet ring and the right half cycle of common mode magnet ring according to counterclockwise or clockwise direction; Said single turn is the wire harness of " 8 " word shape, is wrapped in the left half cycle of differential mode magnet ring and common mode magnet ring.
Preferably, said differential mode magnet ring is positioned at the top of said common mode magnet ring, and said two sections wire harness serve as the coiling initiating terminal with the common mode magnet ring all, and the initiating terminal of two sections wire harness is positioned at the homonymy of common mode magnet ring.
Preferably, said single turn is the wire harness of " 0 " word shape, is wrapped in the left half cycle of differential mode magnet ring and common mode magnet ring according to counterclockwise or clockwise direction; Said single turn is the wire harness of " 8 " word shape, is wrapped in the right half cycle of differential mode magnet ring and common mode magnet ring.
Preferably, said single turn is the wire harness of " 0 " word shape, is wrapped in the right half cycle of differential mode magnet ring and common mode magnet ring according to counterclockwise or clockwise direction; Said single turn is the wire harness of " 8 " word shape, is wrapped in the left half cycle of differential mode magnet ring and common mode magnet ring.
The utility model also provides a kind of electromagnetic interface filter, and this electromagnetic interface filter is provided with poor common mode integrated inductor.Said poor common mode integrated inductor comprises differential mode magnet ring, common mode magnet ring and two sections wire harness; An end face of said differential mode magnet ring is relative with an end face of said common mode magnet ring; One wire harness with the single turn canoe be " 0 " word shape, another wire harness with the single turn canoe for " 8 " word shape respectively symmetry be wrapped on said differential mode magnet ring and the common mode magnet ring.
The utility model is wound on the differential mode magnet ring through specific winding mode with the common mode magnet ring; Realize that the difference common mode inductance is integrated; Not only can reduce the volume of existing electromagnetic interface filter, but also can improve the noise inhibiting ability of electromagnetic interface filter, take into account the inhibition of poor common-mode noise.
Description of drawings
Fig. 1 is the structural representation of the utility model difference common mode integrated inductor one execution mode;
Fig. 2 is the vertical cross-section structural representation among the utility model difference common mode integrated inductor first embodiment;
Fig. 3 is the vertical cross-section structural representation among the utility model difference common mode integrated inductor second embodiment;
Fig. 4 is the vertical cross-section structural representation among the utility model difference common mode integrated inductor the 3rd embodiment;
Fig. 5 is the vertical cross-section structural representation among the utility model difference common mode integrated inductor the 4th embodiment;
Fig. 6 is the vertical cross-section structural representation among the utility model difference common mode integrated inductor the 5th embodiment;
Fig. 7 is the vertical cross-section structural representation among the utility model difference common mode integrated inductor the 6th embodiment;
Fig. 8 is the vertical cross-section structural representation among the utility model difference common mode integrated inductor the 7th embodiment;
Fig. 9 is the vertical cross-section structural representation among the utility model difference common mode integrated inductor the 8th embodiment.
The realization of the utility model purpose, functional characteristics and advantage will combine embodiment, further specify with reference to accompanying drawing.
Embodiment
Should be appreciated that specific embodiment described herein only in order to explanation the utility model, and be not used in qualification the utility model.
With reference to Fig. 1, the structural representation of the utility model difference common mode integrated inductor one execution mode is proposed.The utility model difference common mode integrated inductor comprises differential mode magnet ring 11, common mode magnet ring 12, first wire harness 21 and second wire harness 22.Wherein, an end face of differential mode magnet ring 11 end face and common mode magnet ring 12 is relative.First wire harness 21 with the single turn canoe be " 0 " word shape, second wire harness 22 with the single turn canoe for " 8 " word shape respectively symmetry be wrapped on differential mode magnet ring 11 and the common mode magnet ring 12.Certainly, also can be first wire harness 21 with the single turn canoe for " 8 " word shape, second wire harness 22 with the single turn canoe for " 0 " word shape respectively symmetry be wrapped on differential mode magnet ring 11 and the common mode magnet ring 12.After coiling is accomplished, interval second wire harness 22 between the end face of differential mode magnet ring 11 and common mode magnet ring 12.In the utility model execution mode, in order to prevent in first wire harness 21 and second wire harness 22 that electric current is excessive and cause differential mode inductance saturated, differential mode magnet ring 11 is selected the low materials of magnetic permeability such as ferrocart core, iron sial for use.
Should be noted that; In the utility model execution mode, just enumerate a kind of winding mode of explanation first wire harness 21 and second wire harness 22; Can also be that first wire harness 21 is to intersect the coiling form in practical application; Second wire harness 22 adopts the continuous winding form, is wrapped in symmetrically respectively on two half cycles of differential mode magnet ring 11 and common mode magnet ring 12.In the utility model execution mode, first wire harness 21 is different with the applied environment of the visual product of number of turns n of second wire harness 22, and gets different numerical (for example 1～100 is perhaps more), does not limit at this.
The utility model difference common mode integrated inductor stacks coiling by two magnet rings and forms; Form two inductance around common mode inductance, differential mode magnet ring around differential mode inductance with the common mode magnet ring respectively in the prior art relatively, the volume of the utility model difference common mode integrated inductor is littler; And, improved the differential mode filter effect greatly because the utility model difference common mode integrated inductor has comprised differential mode inductance on the basis that does not reduce the common mode inductance sensibility reciprocal, rather than only depends on the differential mode leakage inductance of common mode inductance to accomplish differential mode filtering.
In the utility model execution mode; The coiling form of first wire harness 21 and second wire harness 22 has multiple; Can select flexibly; For example in a preferred version, first wire harness 21 and second wire harness 22 are top with same magnet ring all, are wrapped in symmetrically and evenly on two half cycles of differential mode magnet ring 11 and common mode magnet ring 12.The single turn of first wire harness 21 can be " 8 " word shape, and the single turn of second wire harness 22 is " 0 " word shape; The single turn that also can be first wire harness 21 is " 0 " word shape, and the single turn of second wire harness 22 is " 8 " word shape.
In the utility model execution mode, differential mode magnet ring 11 can be positioned at the below of common mode magnet ring 12, and two sections wire harness serve as the coiling initiating terminal with differential mode magnet ring 11 all; Perhaps, differential mode magnet ring 11 is positioned at the top of common mode magnet ring 12, and two sections wire harness serve as the coiling initiating terminal with common mode magnet ring 12 all.Below will divide a plurality of embodiment that the structure of the utility model difference common mode integrated inductor is elaborated with the diverse location of differential mode magnet ring 11 relative common mode magnet rings 12.
With reference to Fig. 2 to Fig. 5; Be the vertical cross-section structural representation after the coiling of the utility model difference common mode integrated inductor; Several kinds of coiling forms when showing differential mode magnet ring 11 and being positioned at the top of common mode magnet ring 12; During Fig. 2 was extremely embodiment illustrated in fig. 5, first wire harness 21 and second wire harness 22 served as the coiling initiating terminal with common mode magnet ring 12 all, and the initiating terminal of two sections wire harness is positioned at the homonymy of common mode magnet ring 12.
As shown in Figure 2, be the vertical cross-section structural representation among the utility model difference common mode integrated inductor first embodiment.In the present embodiment, the top 211 of first wire harness 21 is positioned at the inboard of common mode magnet ring 12 left half cycles, and according to the left half cycle of clockwise direction continuous winding form uniform winding at differential mode magnet ring 11 and common mode magnet ring 12, single turn forms " 0 " word shape.Second wire harness 22 begins to end to the outside of common mode magnet ring 12 from the inboard of common mode magnet ring 12 right half cycles, and to intersect coiling form uniform winding at differential mode magnet ring 11 and common mode magnet ring 12 right half cycles, single turn forms " 8 " word shape.
As shown in Figure 3, be the vertical cross-section structural representation among the utility model difference common mode integrated inductor second embodiment.In the present embodiment, the top 211 of first wire harness 21 is positioned at the inboard of common mode magnet ring 12, to intersect coiling form uniform winding at differential mode magnet ring 11 and common mode magnet ring 12 left half cycles.Concrete; First wire harness 21 begins from the inboard of common mode magnet ring 12 left half cycles; To the coiling of the outside of common mode magnet ring 12; Via contact-making surface, the inboard of differential mode magnet ring 11 left half cycles, the top end face of differential mode magnet ring 11 left half cycles, the outside of differential mode magnet ring 11 left half cycles, the differential mode magnet ring 11 and the contact-making surface of common mode magnet ring 12, the left half cycle inboard of common mode magnet ring 12 of common mode magnet ring 12 with differential mode magnet ring 11, end to the outside of common mode magnet ring 12, single turn forms " 8 " word shape.The top 221 of second wire harness 22 is positioned at the inboard of common mode magnet ring 12 right half cycles; Begin from the inboard of common mode magnet ring 12 right half cycles; With the right half cycle of continuous winding form uniform winding at differential mode magnet ring 11 and common mode magnet ring 12, single turn forms " 0 " word shape according to counterclockwise.
As shown in Figure 4, be the vertical cross-section structural representation among the utility model difference common mode integrated inductor the 3rd embodiment.In the present embodiment, the top 211 of first wire harness 21 is positioned at the outside of common mode magnet ring 12 left half cycles, begins from the outside of common mode magnet ring 12 left half cycles, and to intersect coiling form uniform winding at differential mode magnet ring 11 and common mode magnet ring 12 left half cycles, single turn forms " 8 " word shape.The top 221 of second wire harness 22 is positioned at the outside of common mode magnet ring 12 right half cycles; Begin from the outside of common mode magnet ring 12 right half cycles; According to the right half cycle of clockwise direction continuous winding form uniform winding at differential mode magnet ring 11 and common mode magnet ring 12, single turn forms " 0 " word shape.
As shown in Figure 5, be the structural representation of vertical cross-section among the utility model difference common mode integrated inductor the 4th embodiment.In the present embodiment, the top 211 of first wire harness 21 is positioned at the outside of common mode magnet ring 12 left half cycles, and according to the left half cycle of counter clockwise direction continuous winding form uniform winding at differential mode magnet ring 11 and common mode magnet ring 12, single turn forms " 0 " word shape.Second wire harness 22 begins to end to the inboard of common mode magnet ring 12 from the outside of common mode magnet ring 12 right half cycles, and to intersect coiling form uniform winding at differential mode magnet ring 11 and common mode magnet ring 12 right half cycles, single turn forms " 8 " word shape.
With reference to Fig. 6 to Fig. 9, be the vertical cross-section structural representation after the coiling of the utility model difference common mode integrated inductor, several kinds of coiling forms when showing differential mode magnet ring 11 and being positioned at the below of common mode magnet ring 12.During Fig. 6 is extremely embodiment illustrated in fig. 9; First wire harness 21 and second wire harness 22 serve as the coiling initiating terminal with differential mode magnet ring 11 all; The initiating terminal of two sections wire harness lays respectively at the heteropleural of differential mode magnet ring 11; Promptly the top of first wire harness 21 is positioned at the inboard of differential mode magnet ring 11, and then the top of second wire harness 22 is positioned at the outside of differential mode magnet ring 11; Perhaps the top of first wire harness 21 is positioned at the outside of differential mode magnet ring 11, and the top of second wire harness 22 is positioned at the inboard of differential mode magnet ring 11.
As shown in Figure 6, be the vertical cross-section structural representation among the utility model difference common mode integrated inductor the 5th embodiment.In the present embodiment, the top 211 of first wire harness 21 is positioned at the inboard of differential mode magnet ring 11 left half cycles, and to intersect coiling form uniform winding at differential mode magnet ring 11 and common mode magnet ring 12 left half cycles, its single turn is " 8 " word shape.Concrete; First wire harness 21 begins from the inboard of differential mode magnet ring 11 left half cycles; Wind the line to differential mode magnet ring 11 outsides; Via contact-making surface, the inboard of common mode magnet ring 12 left half cycles, the top end face of common mode magnet ring 12 left half cycles, the outside of common mode magnet ring 12 left half cycles, the differential mode magnet ring 11 and the contact-making surface of common mode magnet ring 12, the left half cycle inboard of differential mode magnet ring 11 of differential mode magnet ring 11, end to the outside of differential mode magnet ring 11 with common mode magnet ring 12.The top 221 of second wire harness 22 is positioned at the outside of differential mode magnet ring 11; The right half cycle outside of top end face, common mode magnet ring 12 and the differential mode magnet ring 11 of, common mode magnet ring 12 right half cycles inboard with the continuous winding form via the right half cycle of differential mode magnet ring 11 and common mode magnet ring 12 according to clockwise direction; End inboard to differential mode magnet ring 11 right half cycles; Uniform winding is at differential mode magnet ring 11 and common mode magnet ring 12 right half cycles, and single turn is " 0 " word shape.
As shown in Figure 7, be the vertical cross-section structural representation among the utility model difference common mode integrated inductor the 6th embodiment.In the present embodiment, the top 211 of first wire harness 21 is positioned at the outside of differential mode magnet ring 11 left half cycles, and with the left half cycle of intersection coiling form uniform winding at differential mode magnet ring 11 and common mode magnet ring 12, its single turn is " 8 " word shape.The top 221 of second wire harness 22 is positioned at the inboard of differential mode magnet ring 11; Inboard via the right half cycle of top end face, common mode magnet ring 12 and the differential mode magnet ring 11 of the right half cycle outside of differential mode magnet ring 11 and common mode magnet ring 12, common mode magnet ring 12 right half cycles according to counterclockwise with the continuous winding form; End in the outside to differential mode magnet ring 11 right half cycles; Uniform winding is at differential mode magnet ring 11 and common mode magnet ring 12 right half cycles, and single turn is " 0 " word shape.
As shown in Figure 8, be the vertical cross-section structural representation of difference common mode integrated inductor among the utility model difference common mode integrated inductor the 7th embodiment.In the present embodiment, the top 211 of first wire harness 21 is positioned at the inboard of differential mode magnet ring 11, and according to the left half cycle of clockwise direction continuous winding form uniform winding at differential mode magnet ring 11 and common mode magnet ring 12, single turn forms " 0 " word shape.The top 221 of second wire harness 22 is positioned at the outside of differential mode magnet ring 11, and with the right half cycle of intersection coiling form uniform winding at differential mode magnet ring 11 and common mode magnet ring 12, its single turn is " 8 " word shape.
As shown in Figure 9, be the cross section structure sketch map among the utility model difference common mode integrated inductor the 8th embodiment.In the present embodiment, the top 211 of first wire harness 21 is positioned at the outside of differential mode magnet ring 11, and according to the left half cycle of counter clockwise direction continuous winding form uniform winding at differential mode magnet ring 11 and common mode magnet ring 12, single turn forms " 0 " word shape.The top 221 of second wire harness 22 is positioned at the inboard of differential mode magnet ring 11, and to intersect coiling form uniform winding at differential mode magnet ring 11 and common mode magnet ring 12 right half cycles, single turn is " 8 " word shape.
The utility model also provides a kind of electromagnetic interface filter, and this electromagnetic interface filter is provided with aforementioned poor common mode integrated inductor.Difference common mode integrated inductor comprises differential mode magnet ring 11, common mode magnet ring 12 and two sections wire harness; Wherein a wire harness with the single turn canoe be " 0 " word shape, another wire harness with the single turn canoe for " 8 " word shape respectively symmetry be wrapped on differential mode magnet ring 11 and the common mode magnet ring 12, realize that the difference common mode inductance is integrated.In the utility model electromagnetic interface filter, the structure of difference common mode integrated inductor can be with reference to earlier figures 1～embodiment illustrated in fig. 9.Owing to adopted the structure of difference common mode integrated inductor in the previous embodiment, the utility model electromagnetic interface filter not only volume and has the noise inhibiting ability of differential mode inductance concurrently less than electromagnetic interface filter of the prior art.
The above is merely the preferred embodiment of the utility model; Be not thus the restriction the utility model claim; 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 utility model.
Claims (10)
1. a poor common mode integrated inductor is characterized in that, comprises differential mode magnet ring, common mode magnet ring and two sections wire harness; An end face of said differential mode magnet ring is relative with an end face of said common mode magnet ring; One wire harness with the single turn canoe be " 0 " word shape, another wire harness with the single turn canoe for " 8 " word shape respectively symmetry be wrapped on said differential mode magnet ring and the common mode magnet ring.
2. poor common mode integrated inductor as claimed in claim 1 is characterized in that, said two sections wire harness are top with same magnet ring, are wrapped in symmetrically and evenly respectively on differential mode magnet ring and the common mode magnet ring.
3. poor common mode integrated inductor as claimed in claim 2 is characterized in that, the material of said differential mode magnet ring is ferrocart core or iron sial.
4. poor common mode integrated inductor as claimed in claim 3 is characterized in that said differential mode magnet ring is positioned at the below of said common mode magnet ring, and said two sections wire harness serve as the coiling initiating terminal with the differential mode magnet ring all, and the initiating terminal of two sections wire harness lays respectively at the heteropleural of differential mode magnet ring.
5. poor common mode integrated inductor as claimed in claim 4 is characterized in that said single turn is the wire harness of " 0 " word shape, is wrapped in the left half cycle of differential mode magnet ring and common mode magnet ring according to counterclockwise or clockwise direction; Said single turn is the wire harness of " 8 " word shape, is wrapped in the right half cycle of differential mode magnet ring and common mode magnet ring.
6. poor common mode integrated inductor as claimed in claim 4 is characterized in that said single turn is the wire harness of " 0 " word shape, is wrapped in differential mode magnet ring and the right half cycle of common mode magnet ring according to counterclockwise or clockwise direction; Said single turn is the wire harness of " 8 " word shape, is wrapped in the left half cycle of differential mode magnet ring and common mode magnet ring.
7. poor common mode integrated inductor as claimed in claim 3 is characterized in that said differential mode magnet ring is positioned at the top of said common mode magnet ring, and said two sections wire harness serve as the coiling initiating terminal with the common mode magnet ring all, and the initiating terminal of two sections wire harness is positioned at the homonymy of common mode magnet ring.
8. poor common mode integrated inductor as claimed in claim 7 is characterized in that said single turn is the wire harness of " 0 " word shape, is wrapped in the left half cycle of differential mode magnet ring and common mode magnet ring according to counterclockwise or clockwise direction; Said single turn is the wire harness of " 8 " word shape, is wrapped in the right half cycle of differential mode magnet ring and common mode magnet ring.
9. poor common mode integrated inductor as claimed in claim 7 is characterized in that said single turn is the wire harness of " 0 " word shape, is wrapped in the right half cycle of differential mode magnet ring and common mode magnet ring according to counterclockwise or clockwise direction; Said single turn is the wire harness of " 8 " word shape, is wrapped in the left half cycle of differential mode magnet ring and common mode magnet ring.
10. an EMI FILTER is characterized in that, comprises like each described poor common mode integrated inductor in the claim 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203554754U CN202275687U (en) | 2011-09-21 | 2011-09-21 | Difference and common module integrated inductor and electromagnetic interference (EMI) filter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203554754U CN202275687U (en) | 2011-09-21 | 2011-09-21 | Difference and common module integrated inductor and electromagnetic interference (EMI) filter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202275687U true CN202275687U (en) | 2012-06-13 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011203554754U Expired - Lifetime CN202275687U (en) | 2011-09-21 | 2011-09-21 | Difference and common module integrated inductor and electromagnetic interference (EMI) filter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202275687U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103545085A (en) * | 2013-11-01 | 2014-01-29 | 辽宁工程技术大学 | Double-magnetic-core CM-DM-integrated (common mode-difference mode-integrated) EMI (electro-magnetic interference) filter |
| CN105592675A (en) * | 2014-10-22 | 2016-05-18 | 深圳振华富电子有限公司 | Electromagnetic interference filter |
| CN106601431A (en) * | 2016-11-08 | 2017-04-26 | 合肥博微田村电气有限公司 | Common-mode and differential-mode inductor |
-
2011
- 2011-09-21 CN CN2011203554754U patent/CN202275687U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103545085A (en) * | 2013-11-01 | 2014-01-29 | 辽宁工程技术大学 | Double-magnetic-core CM-DM-integrated (common mode-difference mode-integrated) EMI (electro-magnetic interference) filter |
| CN105592675A (en) * | 2014-10-22 | 2016-05-18 | 深圳振华富电子有限公司 | Electromagnetic interference filter |
| CN105592675B (en) * | 2014-10-22 | 2018-11-02 | 深圳振华富电子有限公司 | Emi filter |
| CN106601431A (en) * | 2016-11-08 | 2017-04-26 | 合肥博微田村电气有限公司 | Common-mode and differential-mode inductor |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address |
Address after: Nanshan District Xueyuan Road in Shenzhen city of Guangdong province 518055 No. 1001 Nanshan Chi Park B2 building 1-4 floor, building 6-10 Patentee after: Vitamin Technology Co., Ltd. Address before: 518057 Nanshan District science and Technology Industrial Park, Guangdong, Shenzhen Branch Road, No. Patentee before: Aimosheng Network Energy Source Co., Ltd. |
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| CP03 | Change of name, title or address | ||
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Granted publication date: 20120613 |
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| CX01 | Expiry of patent term |