CN101752059B - Winding power inductance component and manufacturing method thereof - Google Patents
Winding power inductance component and manufacturing method thereof Download PDFInfo
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- CN101752059B CN101752059B CN2010101063620A CN201010106362A CN101752059B CN 101752059 B CN101752059 B CN 101752059B CN 2010101063620 A CN2010101063620 A CN 2010101063620A CN 201010106362 A CN201010106362 A CN 201010106362A CN 101752059 B CN101752059 B CN 101752059B
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- power inductance
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Abstract
The invention discloses a winding power inductance component, comprising a drum type magnetic core which comprises an upper pendulum, a lower pendulum and a core column which connects the upper pendulum and the lower pendulum; an external electrode which is formed at the bottom of the lower pendulum; a coil which is wound on the core column and the two ends of which is electrically connected with the external electrode; and a magnetic pyrocondensation material part which is covered on the coil, the upper pendulum and the lower pendulum. The invention also discloses a manufacturing method of the winding power inductance component. The winding power inductance component has strong shock resistance, steady electric property, high reliability and good electromagnetic compatibility.
Description
Technical field
The present invention relates to electronic devices and components, relate to a kind of winding power inductance component and manufacturing approach thereof in particular.
Background technology
Along with development of electronic technology; Electronic devices and components are gradually to miniaturization, lightweight, high frequencyization, big electric current, low EMI (electromagnetic interference) and low manufacturing cost and high reliability development; Require product under the situation of temperature acute variation and powerful external impacts, still can keep good performance.At present, various winding power inductance components are of a great variety, but almost do not have to take into account preferably the product of above whole requirements.
For common open-flux path winding power inductor product, though can accomplish higher frequency of utilization, dimensions of device own and quality are bigger, and have serious EMI problem.
For adding magnet ring or magnetic bucket formula closed magnetic circuit winding power inductor product, though can solve the EMI problem preferably, the product rated current can also be accomplished largely; But the device frequency of utilization is lower; Overlapping characteristic is relatively poor, and manufacturing cost is high, and anti-mechanical shock of product and jolt capacity are relatively poor.
For applying magnetic glue formula closed magnetic circuit winding power inductor product; Though can solve the EMI problem preferably; Product rated current and frequency of utilization are all higher, but balance staff is higher to requirement of strength up and down to the contraction consistency of uniformity, glue and the magnetic core of glue and to magnetic core.
Summary of the invention
Main purpose of the present invention is exactly the deficiency to prior art; Provide a kind of and have that shock resistance is strong, electric property is stable, reliability is high; Simultaneously cost is relatively low, and frequency of utilization is higher, Electro Magnetic Compatibility closed magnetic circuit winding power inductance component preferably.
For realizing above-mentioned purpose, the present invention adopts following technical scheme:
A kind of winding power inductance component comprises:
The drum type magnetic core comprises pendulum, the bottom and connects the said stem stem of going up the pendulum and the said bottom;
Outer electrode is formed on the bottom of the said bottom;
Coil is wound on the said stem stem, and two ends are electrically connected said outer electrode;
Also comprise and cover said coil, said pendulum and the said magnetic material contracting with heat parts of laying out down gone up.
Preferably, said magnetic material contracting with heat parts are the part that cannula-like coats said drum type magnetic core and covers said upward pendulum end face.
Preferably, said magnetic material contracting with heat parts comprise ferromagnetic oxide powder and macromolecular material.
Preferably, said macromolecular material belongs to epoxy resin mixed system, silicones system or silicon rubber system.
Preferably; The bottom of the said bottom is provided with metallic pin or metallization groove or sheet metal or the substrate that is used to form outer electrode; The two ends of said coil are electrically connected said metallic pin or said metallization groove or said sheet metal; Or be electrically connected and be arranged on the sheet metal at said substrate two ends, or directly be wrapped in said substrate two ends.
A kind of manufacturing approach of winding power inductance component may further comprise the steps:
The magnetic core preparatory process, preparation comprises the drum type magnetic core of stem stem and upper and lower pendulum;
Electrode forming process forms electrode in the bottom of the said bottom;
The coil winding operation on said stem stem, and is electrically connected said electrode with the end of a thread and line tail with coil winding; With
Cover material process, magnetic material contracting with heat parts are covered said coil and said upper and lower laying out, shrink typing through heating again.
Preferably, said covering in the material process makes said magnetic material contracting with heat parts be cannula-like and coats said drum type magnetic core and cover a said part that goes up the pendulum end face.
Preferably, said magnetic material contracting with heat parts comprise ferromagnetic oxide powder and macromolecular material.
Preferably, said macromolecular material belongs to epoxy resin mixed system, silicones system or silicon rubber system.
Preferably; The bottom that said electrode forming process is included in the said bottom is provided with metallic pin or sheet metal or metallization groove or substrate; The two ends of said coil are electrically connected said metallic pin or said metallization groove or said sheet metal; Or be electrically connected and be arranged on the sheet metal at said substrate two ends, or directly be wrapped in said substrate two ends.
Beneficial technical effects of the present invention is:
According to the present invention; Upper and lower laying out at coil and drum type magnetic core is coated with magnetic material contracting with heat parts; Because magnetic material contracting with heat parts have better elastic, radial contraction is big during heating, and axial shrinkage is little; Therefore the thermal shock circulation time that experiences-40 ℃～+ 125 ℃ is very little to the axial stress that the upper and lower pendulum of drum type magnetic core is produced, and guarantees that product has good heat shock resistance and mechanical shock characteristic.The reliability experimental result shows, product is at 5-55Hz, under the amplitude 1.5mm situation, vibrate highly freely fell 2 times in 6 hours and 1 meter after, the product body does not have any mechanical damage.Simultaneously; The bottom and coil closely are connected on magnetic material contracting with heat parts and the magnetic core; When receiving extraneous physical impact, flexible magnetic material contracting with heat parts shell can play good cushioning effect, has greatly reduced the impact strength of external force to the magnetic core body; Thereby make the anti-physical impact ability of product significantly promote, Mechanical Reliability can obviously increase.
Magnetic material contracting with heat parts not only have the effect of protection coil, owing to be magnetic, closed magnetic circuit can be provided simultaneously; Thereby under the situation that does not increase wire circle or magnetic core size and magnetic permeability; Can reach bigger inductance value, compare with common open-flux path winding power inductive type, under the situation of identical wire circle and core structure; Magnetic material contracting with heat parts can make the product inductance value improve 0%～100%, thereby make the production cost reduce.
Magnetic material contracting with heat parts are magnetisable material; Can closely be connected through the bottom on hot baking process and the magnetic core and coil portion; Thereby constitute complete closed magnetic circuit structure, with open-flux path and add magnet ring or magnetic barrel shape structure is compared, do not have tangible air gap; The leakage field that air gap causes greatly reduces magnetic circuit owing to can reduce the EMI radiation greatly.
Magnetic material contracting with heat parts can be formed by mictomagnetism powder and macromolecular material, through the ratio of adjusting magnetic and macromolecular material, or magnetic material and magnetic material contracting with heat component thickness, can regulate product inductance value ascensional range and overlapping characteristic.This composite material is evenly distributed; Magnetic loss is little, and it is high that product is suitable for frequency, reaches as high as hundreds of megahertzes; Present relatively various closed magnetic circuit winding power inductance; Needn't only promptly can be made into finished product through some adhesive curing or assembling magnet ring and magnetic bucket technology realization closed magnetic circuit structure, simplify production technology through simple magnetic material contracting with heat parts heating for fixing shape.
The present invention is rational in infrastructure, low cost of manufacture, and physical size is little, and has kept the overlapping characteristic of direct current good, and anti-electric current is big, and frequency of utilization is high, the characteristics that reliability is good.
Description of drawings
Fig. 1 is the drum-shaped magnetic core configuration diagram of one embodiment of the invention;
Fig. 2 a-2c is respectively drum type magnetic core front view, left view and the vertical view of one embodiment of the invention;
Fig. 3 is the winding power inductance component configuration diagram of one embodiment of the invention;
Fig. 4 a-4c is winding power inductance component front view, left view and the vertical view of one embodiment of the invention;
Fig. 5 is that one embodiment of the invention adopts the bonded metal sheet to form the configuration diagram of electrode;
Fig. 6 is that one embodiment of the invention adopts the metallization groove to form the configuration diagram of electrode;
Fig. 7 a, 7b are that one embodiment of the invention adopts adhesive base plate to form the configuration diagram of electrode, and wherein Fig. 7 a is that line end connects sheet metal formation electrode, and Fig. 7 b is that line end directly twines the formation electrode.
Fig. 8 is the manufacture craft flow chart of one embodiment of the invention;
Fig. 9 be with Fig. 8 in the corresponding Product Status figure of each technology.
Embodiment
Below combine accompanying drawing that the present invention is further specified through embodiment.
Please refer to Fig. 1 to Fig. 4 c; The winding power inductance component of a kind of embodiment comprises drum type magnetic core, coil 31, outer electrode 21a, 21b and connects the drum type magnetic core and the connecting portion 22 of outer electrode 21a, 21b; The drum type magnetic core has the stem stem 13 of going up pendulum 11, the bottom 12, reaching the upper and lower pendulum of connection; Coil 31 is wound on the stem stem 13; The two ends of coil 31 are electrically connected with outer electrode 21a, 21b, and according to characteristics of the present invention, this winding power inductance component also has the magnetic material contracting with heat parts 41 that cover on coil 31 and last pendulum 11, the bottom 12.
Magnetic material contracting with heat parts are the pyrocondensation elastic solid (Hookean body), can shrink and have elasticity preferably during heating.When receiving external environment condition thermal shock or mechanical impact, magnetic material contracting with heat parts can play cushioning effect preferably to product, avoid magnetic core breakage or cracking phenomena to occur, guarantee the shock resistance of product fine.Radial contraction is big during the heating of magnetic material contracting with heat parts; Axial shrinkage is little, and for example, the thermal shock circulation time that experiences-40 ℃～+ 125 ℃ is very little to the axial stress that the bottom produced on the magnetic core; Can not cause pendulum 11 or the bottom 12 crackings on the following thickness magnetic core of 0.2mm, so reliability is high.
Simultaneously,, under the situation of externally-applied magnetic field, can produce self-induction magnetic field, when magnetic material contracting with heat parts and upper and lower pendulum of magnetic core and coil close proximity, can be winding power inductance component closed magnetic circuit is provided because magnetic material contracting with heat parts have magnetic.In the preferred embodiment, magnetic material contracting with heat parts are all sides that cannula-like coats the drum type magnetic core, and cover the part of pendulum end face on the magnetic core.Because the existence of magnetic material contracting with heat parts, winding power inductance component can be issued to bigger inductance value in the situation that does not increase wire circle or magnetic core size and magnetic permeability.Because magnetic material contracting with heat parts and magnetic core have formed complete closed magnetic circuit structure; With open-flux path and add magnet ring or magnetic barrel shape structure is compared; There is not tangible air gap in winding power inductance component, greatly reduces magnetic circuit because the leakage field that air gap causes can reduce the EMI radiation greatly.
Shown in Fig. 3 to Fig. 4 c, but the bottom 12 bottom bonded metal guide pins of drum type magnetic core as electrode-fixing section, the two ends of the coil 31 of coiling on the stem stem 13 are electrically connected on the metallic pin, handle through wicking, thereby form outer electrode 21a, 21b.
As shown in Figure 5, but the bottom 12 bonded metal sheets of drum type magnetic core as electrode-fixing section, the two ends of the coil 31 of coiling on the stem stem 13 are electrically connected on the sheet metal, again through wicking or soldering, thereby form outer electrode 21a, 21b.
As shown in Figure 6, the bottom 12 bottoms of drum type magnetic core can have the metallization groove, and the two ends of the coil 31 of coiling on the stem stem 13 are electrically connected in the metallization groove, again through wicking or soldering, thereby form outer electrode 21a, 21b.
Shown in Fig. 7 a, 7b; The bottom of drum type magnetic core can be bonded with plastics, ferrite or ceramic substrate; The two ends of the coil 31 of coiling on the stem stem 13 are electrically connected on the sheet metal at substrate two ends or are wrapped in the substrate two ends, again through wicking or soldering, thereby form outer electrode 21a, 21b.
According to various embodiment, the coil of coiling can be that single cord twines on the stem stem, also can be that multi cord twines.
Like Fig. 8, shown in 9, the manufacturing process of the winding power inductance component of an embodiment is following, comprises the operation of step S1～S4.
Step S1: drum type magnetic core preparatory process is about to pendulum and the bottom on the magnetic core, and is connected the operation of drum type magnetic core of the stem stem formation of the bottom.Have as object lesson; To contain ambrose alloy Zn ferrite material powder, resin, adhesive, lubricant and plasticizer carries out mixing; (100～200 ℃) inject curing molding in the die cavity with injection (mo(u)lding) machine under the heating plasticizing state after granulating, and form drum type FERRITE CORE base substrate; Then, with base substrate degreasing, calcining obtained the drum type FERRITE CORE in 3 hours under 800-1000 ℃.
Step S2: the external metallization electrode forming process, promptly contain on the zone in hole directly butt joint metallic pin in the bottom surface of the magnetic core bottom, the blended rubber hydropexis forms the operation of electrode.The hole forms in the dry-pressing process of step 1.Example as concrete has; Utilize the cutter circular copper wire that the top layer is zinc-plated to be cut to the guide pin of length-specific, through mould guide pin one end is flattened circular major part then, the guide pin enlarged rounded head end after will flattening again is stained with glue; And dock with the magnetic hole; Mode through high-temperature baking is connected firmly guide pin and magnetic core glue curing, forms connecting portion and outer electrode.
Step S3: the coil winding operation is about to copper cash and is wound on the stem stem of drum type magnetic core the operation that simultaneously the coil two ends is electrically connected with outer electrode.Object lesson has; Copper cash with polyurethane resin coats is wound on the drum type magnetic core stem stem according to certain direction rule, and the coil two ends is wrapped in respectively on the magnetic core outer electrode; Then winding portion is carried out wicking together with the magnetic core outer electrode and handle, coil is electrically connected with outer electrode.
Step S4: coated magnetic material contracting with heat parts operation, promptly on coil and magnetic core, put, lay out the elements of magnetic material that coats one deck hot shortness down, thereafter product is dried processing, can obtain shrinking typing back magnetic material contracting with heat parts.Object lesson has; Magnetic material contracting with heat parts with internal diameter 8mm; Be cut to 10mm length; Put 11 on the coil 31 that is placed in Φ 7 * 8mm drum type winding power inductance and the magnetic core, on the bottom 12, oven dry is 15 minutes under 150 ℃ of conditions, can obtain being coated with the new wound-rotor power inductance component of magnetic material contracting with heat parts 41.
As the magnetic material contracting with heat parts that contain above-mentioned Magnaglo, can form jointly by ferrite powder and macromolecular material.Macromolecular material for example is rubber-plastics material and various additive.
As shown in table 1, under the different proportioning situation with macromolecular material of ferrite powder, different-thickness magnetic material contracting with heat parts are to the influence of properties of product.Follow the increase of ferrite powder ratio and magnetic material contracting with heat component thickness, the product inductance value improves constantly.Simultaneously, because used magnetic material contracting with heat parts of the present invention have elasticity preferably, thereby guarantee that product has good impact resistance.
Different proportionings of table 1 magnetic material contracting with heat parts and thickness influence product performance
Annotate: (1) thermal shock condition: 100 circulations of-40～+ 125 ℃ of thermal shocks;
(2) mechanical shock condition: height falls 2 times for 1 meter;
(3) not damaged: 30 * microscopically is observed, and the product body does not have damaged and cracking situation.
More than; Physical characteristic to manufacture craft of the present invention and magnetic material contracting with heat parts has been carried out simple declaration; But; Wherein magnetic material contracting with heat parts composition proportion is not limit by table 1 in the instance, can have multiple formulations, such as epoxy resin mixed system, silicones system, silicon rubber system or the like.
No matter be the sort of prescription or structure, its magnetic material contracting with heat parts particle content is unsuitable too high.Help improving the product inductance value though particle content improves, coil periphery magnetic field porosity decreases, and the direct current biasing characteristic of product has degradation trend.Take into account product direct current biasing characteristic, with product inductance lifting capacity, think that macromolecular material and ferromagnetic oxide powder ratio 1: 2 are comparatively suitable, magnetic material contracting with heat component thickness can require to regulate according to properties of product.
Winding power inductance component kind of the present invention is applicable to electronic products such as digital camera, mobile phone, computer, television set, STB, game machine, automotive electronics, LED illumination.
Above content is to combine concrete preferred implementation to the further explain that the present invention did, and can not assert that practical implementation of the present invention is confined to these explanations.For the those of ordinary skill of technical field under the present invention, under the prerequisite that does not break away from the present invention's design, can also make some simple deduction or replace, all should be regarded as belonging to protection scope of the present invention.
Claims (5)
1. the manufacturing approach of a winding power inductance component is characterized in that, may further comprise the steps:
The magnetic core preparatory process, preparation comprises the drum type magnetic core of stem stem and upper and lower pendulum;
Electrode forming process forms electrode in the bottom of the said bottom;
The coil winding operation on said stem stem, and is electrically connected said electrode with the end of a thread and line tail with coil winding; With
Coated magnetic material contracting with heat parts operation is enclosed within said coil and said upper and lower laying out with magnetic material contracting with heat parts, shrinks typing through heating again.
2. the manufacturing approach of winding power inductance component as claimed in claim 1 is characterized in that, said covering in the material process makes said magnetic material contracting with heat parts be cannula-like and coat said drum type magnetic core and cover a said part that goes up the pendulum end face.
3. the manufacturing approach of winding power inductance component as claimed in claim 1 is characterized in that, said magnetic material contracting with heat parts comprise ferromagnetic oxide powder and macromolecular material.
4. winding power inductance method as claimed in claim 3 is characterized in that said macromolecular material belongs to epoxy resin mixed system, silicones system or silicon rubber system.
5. like the manufacturing approach of each described winding power inductance component in the claim 1 to 4; It is characterized in that; The bottom that said electrode forming process is included in the said bottom is provided with metallic pin or sheet metal or metallization groove or substrate; The two ends of said coil are electrically connected said metallic pin or said metallization groove or said sheet metal, or are electrically connected and are arranged on the sheet metal at said substrate two ends, or directly be wrapped in said substrate two ends.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN2010101063620A CN101752059B (en) | 2010-01-18 | 2010-01-18 | Winding power inductance component and manufacturing method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010101063620A CN101752059B (en) | 2010-01-18 | 2010-01-18 | Winding power inductance component and manufacturing method thereof |
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| CN101752059A CN101752059A (en) | 2010-06-23 |
| CN101752059B true CN101752059B (en) | 2012-07-04 |
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Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102097200B (en) * | 2010-12-20 | 2013-06-19 | 深圳顺络电子股份有限公司 | Core column component of winding type pasted electronic element and manufacturing method thereof |
| CN104217848A (en) * | 2013-05-31 | 2014-12-17 | 苏州隆亿电子科技有限公司 | Magnetic shielding inductance element manufacturing method and magnetic shielding inductance element |
| CN103646750A (en) * | 2013-12-19 | 2014-03-19 | 淮安市鼎新电子有限公司 | Magnetic sealing compound winding type power inductor and preparation method thereof |
| CN105825997B (en) * | 2015-01-22 | 2019-03-22 | 株式会社村田制作所 | Coil component |
| CN107516570A (en) * | 2017-09-06 | 2017-12-26 | 长兴华强电子股份有限公司 | A kind of inductance element and its manufacture method with heat-shrinkable T bush |
| CN109754986B (en) * | 2019-01-28 | 2024-01-05 | 东莞顺络电子有限公司 | Injection molding inductor and manufacturing method thereof |
| CN117334433B (en) * | 2023-12-01 | 2024-03-01 | 保定市恒光电气机械有限公司 | Miniaturized high-frequency high-voltage transformer |
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| US7495538B2 (en) * | 2006-08-25 | 2009-02-24 | Taiyo Yuden Co., Ltd. | Inductor using drum core and method for producing the same |
| CN101692385A (en) * | 2009-09-01 | 2010-04-07 | 吴卫生 | Inductor and manufacturing method thereof |
| CN201600982U (en) * | 2010-01-18 | 2010-10-06 | 深圳顺络电子股份有限公司 | Winding power inductance component |
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2010
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7495538B2 (en) * | 2006-08-25 | 2009-02-24 | Taiyo Yuden Co., Ltd. | Inductor using drum core and method for producing the same |
| CN101692385A (en) * | 2009-09-01 | 2010-04-07 | 吴卫生 | Inductor and manufacturing method thereof |
| CN201600982U (en) * | 2010-01-18 | 2010-10-06 | 深圳顺络电子股份有限公司 | Winding power inductance component |
Non-Patent Citations (1)
| Title |
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| JP平2-251105A 1990.10.08 |
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