CN105788823A - Power inductor core with closed magnetic circuit structure - Google Patents
Power inductor core with closed magnetic circuit structure Download PDFInfo
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- CN105788823A CN105788823A CN201410817375.7A CN201410817375A CN105788823A CN 105788823 A CN105788823 A CN 105788823A CN 201410817375 A CN201410817375 A CN 201410817375A CN 105788823 A CN105788823 A CN 105788823A
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- magnetic
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- power inductor
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- lid
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Abstract
The invention relates to a power inductor core with a closed magnetic circuit structure. The power inductor core comprises a magnetic base and a magnetic cover, wherein the magnetic cover is fastened to the magnetic base; a magnetic core integrated with the magnetic base is arranged at the center part of the magnetic base; a groove for placing a coil is formed in the periphery of the magnetic core; notches for leading out a coil connector are formed in the edge parts of the groove; and gaps for installing a terminal are reserved at the parts, corresponding to the notches, of the magnetic cover. The invention provides a low-loss and high-current Ni-Zn ferrite core applied to a design of a power inductor product; the design of the low-loss power inductor is achieved; and the product achieves simultaneous matching of low loss, high power and production automation.
Description
Technical field
The present invention relates to a kind of inducer, the power inductor magnetic core of a kind of closing magnetic path structure specifically.
Background technology
In the application of electronic power inductor product, power inductor product needed electric current is big, power consumption is little, and this just requires that the magnetic core saturation induction density (Bs) of power inductor is big as far as possible.And power inductor product must also have enough characteristics preventing from producing interference to other electronic devices and components of periphery, will have less leakage field and flow out.In addition, under the tending to act of the competition of electronics market now, it is desirable to the production of product is as far as possible to automatic improving, to realize the mode of production of miniaturization, low energy consumption, low cost.
At present, power inductor magnetic core adopts the structure of I-shaped magnetic core, is combined (as shown in Figure 1A～1D) with magnet ring, and shield effectiveness is bad, and the poor performance of anti-EMI filter electromagnetic interference, leakage field is big.Realize minimum power consumption coefficient and maximum power transfer, the structural design of magnetic core is necessary for precision prescribed height, fitness good, which increases the complexity of core production, make the magnetic core made be unfavorable for batch production and use, bring bigger trouble to producing.
It is difficulty with coupling while low power consumption, high-power, the production automation currently, with respect to the design of power inductor magnetic core.
Summary of the invention
Be difficult to while low power consumption, high-power, the production automation deficiencies such as coupling for power inductor core structure in prior art, the technical problem to be solved in the present invention is to provide and a kind of utilizes magnetic support, the combinative structure of magnetic lid replaces magnet ring, the combinative structure of magnetic core to be to realize the power inductor magnetic core of the closing magnetic path structure of low-loss power inductor.
For solving above-mentioned technical problem, the technical solution used in the present invention is:
The power inductor magnetic core of a kind of closing magnetic path structure of the present invention, has magnetic support and Ci Gai, and magnetic cover buckle is combined on magnetic support, and magnetic support centre is and the magnetic core of magnetic support one, and magnetic core periphery is the groove placing coil.
Described groove edge is provided with the notch for drawing winding wiring, the breach of the reserved mounting terminal in the position of corresponding notch on magnetic lid.
The power inductor magnetic core of a kind of closing magnetic path structure of the present invention, has magnetic support and Ci Gai, and magnetic cover buckle is combined on magnetic support, and magnetic support is T-shaped from the side, and magnetic support central lug is divided into and the magnetic core of magnetic support one.
It is inboard that a pair edge of described magnetic support is enclosed in magnetic lid, and namely a pair edge of magnetic lid is combined with the edge of magnetic support, and edge is provided with line outlet groove by another of magnetic lid.
A pair edge that magnetic lid is combined with magnetic support edge is provided with locating dowel.
Magnetic support is provided with silver slurry, and winding wire is welded on the sidewall by silver magnetic support.
The invention have the advantages that and advantage:
1. the invention provides a kind of be applied in power inductor product design low-loss, big electric current Ni-Zn FERRITE CORE, namely the combinative structure of magnetic support, the combinative structure replacement magnet ring of magnetic lid, magnetic core is utilized, realize the design of low-loss power inductor, by the continuous adjustment of version, and the raising of seat, lid matching precision, make product reach coupling while low-loss, high-power, the production automation.
2. the present invention, by adopting the combining form of magnetic support, magnetic lid, the leakage field making product can reach to be approximately equal to 0, electromagnetism interference free performance (EMI performance) can be made to be greatly improved, with traditional magnetic cover, core combination structure magnetic core compared with, seat, lid structure core inductance stable, it is possible to make the stability that the DC stacked property retention of product is relative, and then improve the concordance of properties of product.
3. the power inductor magnetic core of the magnetic support of present invention proposition, the knockdown closing magnetic path structure of magnetic lid, in Ni-Zn FERRITE CORE material, when initial magnetic permeability mu i reaches requirement, mainly improve the performance of saturation induction density (Bs), low-loss can not only be reached, and achieve the feature of High-current output, it is achieved that the maximum transmitted of power.
4. the present invention is on product structure, by utilizing, directly reserve on magnetic core can the shape and structure of terminals of a unit block, magnetic core is made can be directly combined together with terminal group when putting into production, or utilize endmost surface silver technology to carry out two ends end silver on I-type magnetic core, core volume is reduced in realization, it is achieved electronic product is increasingly miniaturized and energy-saving and cost-reducing requirement.
5. the present invention is by constantly improving the combinative structure of magnetic support and magnetic lid, improves the combination precision of seat, lid, and the automated production for power inductor is laid a good foundation.
Accompanying drawing explanation
Figure 1A is magnetic support front view in conventional power inductor core structure；
Figure 1B is the right view of Figure 1A；
Fig. 1 C is magnetic core front view in conventional power inductor core structure；
Fig. 1 D is the right view of Fig. 1 C；
Fig. 2 A is magnetic support front view in first embodiment of the invention power inductor core structure；
Fig. 2 B is the top view of Fig. 2 A；
Fig. 2 C is the upward view of Fig. 2 A；
Fig. 3 A is magnetic lid front view in first embodiment of the invention power inductor core structure；
Fig. 3 B is the top view of Fig. 3 A；
Fig. 4 be in first embodiment of the invention power inductor core structure magnetic support and magnetic lid in conjunction with view；
Fig. 5 A is magnetic support front view in second embodiment of the invention power inductor core structure；
Fig. 5 B is the top view of Fig. 5 A；
Fig. 6 A is magnetic lid front view in second embodiment of the invention power inductor core structure；
Fig. 6 B is the top view of Fig. 6 A；
Fig. 6 C is the lateral plan of Fig. 6 A；
Fig. 7 be in second embodiment of the invention power inductor core structure magnetic support and magnetic lid in conjunction with view.
Wherein, 1 is magnetic support, and 2 is magnetic lid, and 3 is magnetic core, and 4 is groove, and 5 is notch, and 6 is breach, and 7 is locating dowel.
Detailed description of the invention
Below in conjunction with Figure of description, the present invention is further elaborated.
Embodiment 1
As shown in Fig. 2 A～2C, 3A～3B and Fig. 4, the power inductor magnetic core of closing magnetic path structure of the present invention, has magnetic support 1 and magnetic lid 2, and magnetic lid 2 is fastened on magnetic support 1, magnetic support 1 centre is and the magnetic core 3 of magnetic support one, and magnetic core 3 periphery is the groove 4 placing coil.
Described groove 4 edge is provided with the notch 5 for drawing winding wiring, the breach 6 of the reserved mounting terminal in the position of corresponding notch 5 on magnetic lid 2.
In the present embodiment, the breach 6 of reserved mounting terminal be in order to hold combine with outlet after form electrode, convenient welding when making coil outlet be fitted on terminal.
The present invention utilizes the combinative structure of magnetic support 1, the combinative structure replacement magnet ring of magnetic lid 2, magnetic core, realize the design of low-loss power inductor, by the continuous adjustment of version, and the raising of seat, lid matching precision, product is made to reach coupling while low-loss, high-power, the production automation.
The present embodiment is by the Ni-Zn FERRITE CORE material of high saturated magnetic induction (Bs), magnetic support, the magnetic lid version development and Design magnetic core of this new power inductor.This magnetic support, magnetic lid version (as shown in Fig. 2 A～2C, 3A～3B and Fig. 4), magnetic support is T font, and magnetic lid is opening shape, after both combinations, define the state all closed up and down, except flowing out a small amount of magnetic line of force from combination gap, then there is no to be formed the passage of leakage field.With magnetic core, magnetic cover combining form ratio, make the leakage field of product no better than 0 structural design, directly enhanced electromagnetism interference free performance.In electric property, by selecting the Ni-Zn ferrite core material of high saturated magnetic induction (Bs) material, improve the electric property of magnetic core, it is possible to achieve the functional design of the big electric current of power inductor product (2.7A-0.6A).
In serviceability and product structure, by improving saturation induction density Bs, reducing magnetic core overall dimensions, make product can realize miniaturization, surface-pasted technical characterstic on using, the automation application tending to miniaturization for electronic product makes corresponding contribution.
Magnetic core in the present invention, combine with distribution terminal, cancel conventional skeleton and terminal combination, again with the structure of core combination, the usefulness that electronic devices and components are energy-saving and cost-reducing is achieved structure, by the continuous improvement to magnetic support, magnetic lid planform, it may be achieved the automatization in power inductor process of producing product, it is substantially reduced the production cost of product.
Embodiment 2
As shown in Fig. 5 A～5B, 6A～6C and Fig. 7, in order to reduce volume further, it is achieved the miniaturization of product, the present invention also has the second structure.
The present embodiment and embodiment 1 are different in that: having magnetic support 1 and magnetic lid 2, magnetic lid 2 is fastened on magnetic support 1, and magnetic support 1 is T-shaped from the side, and magnetic support 1 central lug is divided into and the magnetic core 3 of magnetic support 1 one.
In the present embodiment, it is inboard that a pair edge of magnetic support 1 is enclosed in magnetic lid 2, and namely a pair edge of magnetic lid 2 is combined with the edge of magnetic support 1, and edge is provided with line outlet groove, this structure by another of magnetic lid, it is possible to facilitates production process, improves production efficiency.
A pair edge that magnetic lid 2 is combined with magnetic support 1 edge is provided with locating dowel 7, generation skew when being disposed to prevent magnetic lid and magnetic support from combining of this locating dowel 7, solves the problem that magnetic lid rotates.
Owing to the present embodiment adopts small size design, the processing of terminal is more complicated, is provided with silver slurry for this magnetic support, and namely silver-colored at magnetic support 1 two ends, winding wire is welded on the sidewall by silver magnetic support 1.
In both examples above, magnetic support is T font, magnetic lid is opening shape, after both combinations, defines the state all closed up and down, and shield effectiveness is good, it is to avoid the generation of leakage field.
The present invention actual power inductor core design on, every to realize small size, big electric current, low-loss, high electromagnetism interference performance requirement inductance coil all can implement by this method for designing.Those skilled in the art is to be understood that the structural principle of the present invention is applicable on any inductance coil.
The above Gongwei's presently preferred embodiments of the present invention, the impartial change in all structures made according to the present patent application the scope of the claims with modify, all should belong to the covering scope of the present invention.
Claims (6)
1. the power inductor magnetic core of a closing magnetic path structure, it is characterised in that: having magnetic support and Ci Gai, magnetic cover buckle is combined on magnetic support, and magnetic support centre is and the magnetic core of magnetic support one, and magnetic core periphery is the groove placing coil.
2. by the power inductor magnetic core of the closing magnetic path structure described in claim 1, it is characterised in that: described groove edge is provided with the notch for drawing winding wiring, the breach of the reserved mounting terminal in the position of corresponding notch on magnetic lid.
3. the power inductor magnetic core of a closing magnetic path structure, it is characterised in that: having magnetic support and Ci Gai, magnetic cover buckle is combined on magnetic support, and magnetic support is T-shaped from the side, and magnetic support central lug is divided into and the magnetic core of magnetic support one.
4. by the power inductor magnetic core of the closing magnetic path structure described in claim 3, it is characterised in that: it is inboard that a pair edge of described magnetic support is enclosed in magnetic lid, and namely a pair edge of magnetic lid is combined with the edge of magnetic support, and edge is provided with line outlet groove by another of magnetic lid.
5. by the power inductor magnetic core of the closing magnetic path structure described in claim 3, it is characterised in that: a pair edge that magnetic lid is combined with magnetic support edge is provided with locating dowel.
6. by the power inductor magnetic core of the closing magnetic path structure described in claim 3, it is characterised in that: magnetic support is provided with silver slurry, and winding wire is welded on the sidewall by silver magnetic support.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410817375.7A CN105788823A (en) | 2014-12-24 | 2014-12-24 | Power inductor core with closed magnetic circuit structure |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410817375.7A CN105788823A (en) | 2014-12-24 | 2014-12-24 | Power inductor core with closed magnetic circuit structure |
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| CN105788823A true CN105788823A (en) | 2016-07-20 |
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| CN201410817375.7A Pending CN105788823A (en) | 2014-12-24 | 2014-12-24 | Power inductor core with closed magnetic circuit structure |
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000182845A (en) * | 1998-12-21 | 2000-06-30 | Hitachi Ferrite Electronics Ltd | Composite core |
| CN1941227A (en) * | 2005-09-30 | 2007-04-04 | 东京零件工业股份有限公司 | Surface installation inductor |
| CN101154494A (en) * | 2006-09-27 | 2008-04-02 | 胜美达电机（香港）有限公司 | Inductor |
| US7523542B2 (en) * | 2003-12-10 | 2009-04-28 | Sumida Corporation | Method of manufacturing a magnetic element |
| CN201402702Y (en) * | 2009-03-25 | 2010-02-10 | 台达电子工业股份有限公司 | Inductance assembly |
| CN103489576A (en) * | 2007-06-15 | 2014-01-01 | 库帕技术公司 | Micro shielding magnetic part |
| US8723629B1 (en) * | 2013-01-10 | 2014-05-13 | Cyntec Co., Ltd. | Magnetic device with high saturation current and low core loss |
| CN204270808U (en) * | 2014-12-24 | 2015-04-15 | 丹东大东电子有限公司 | The power inductor magnetic core of closing magnetic path structure |
-
2014
- 2014-12-24 CN CN201410817375.7A patent/CN105788823A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000182845A (en) * | 1998-12-21 | 2000-06-30 | Hitachi Ferrite Electronics Ltd | Composite core |
| US7523542B2 (en) * | 2003-12-10 | 2009-04-28 | Sumida Corporation | Method of manufacturing a magnetic element |
| CN1941227A (en) * | 2005-09-30 | 2007-04-04 | 东京零件工业股份有限公司 | Surface installation inductor |
| CN101154494A (en) * | 2006-09-27 | 2008-04-02 | 胜美达电机（香港）有限公司 | Inductor |
| CN103489576A (en) * | 2007-06-15 | 2014-01-01 | 库帕技术公司 | Micro shielding magnetic part |
| CN201402702Y (en) * | 2009-03-25 | 2010-02-10 | 台达电子工业股份有限公司 | Inductance assembly |
| US8723629B1 (en) * | 2013-01-10 | 2014-05-13 | Cyntec Co., Ltd. | Magnetic device with high saturation current and low core loss |
| CN103928218A (en) * | 2013-01-10 | 2014-07-16 | 乾坤科技股份有限公司 | Magnetic Device With High Saturation Current And Low Core Loss |
| CN204270808U (en) * | 2014-12-24 | 2015-04-15 | 丹东大东电子有限公司 | The power inductor magnetic core of closing magnetic path structure |
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Application publication date: 20160720 |