CN104700984A - Chocker - Google Patents
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- CN104700984A CN104700984A CN201510140217.7A CN201510140217A CN104700984A CN 104700984 A CN104700984 A CN 104700984A CN 201510140217 A CN201510140217 A CN 201510140217A CN 104700984 A CN104700984 A CN 104700984A
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Abstract
The invention discloses a chocker. The chocker comprises a magnetic core and a hollow coil. The magnetic core comprises a first magnetic core body and a second magnetic core body. The first magnetic core body is provided with a central column. The second magnetic core body is a plate provided with an opening. One end of the central column is suitable for being placed into the opening and jointed with the same. The hollow coil sleeves the central column.
Description
The present invention is the applying date is on July 9th, 2009, and application number is 200910158948.9, and denomination of invention is the divisional application of the Chinese patent application of " choke ".
Technical field
The present invention relates to a kind of passive device, particularly relate to a kind of choke.
Background technology
The function of choke is electric current in stabilizing circuit and reaches the object of filtering noise, effect is similar with capacitor, be equally store, electric energy in release circuit to be to regulate the stability of electric current, and be carry out store electrical energy with the form of electric field (electric charge) compared to electric capacity, choke is then reach with the form in magnetic field.
Be illustrated in figure 1 the schematic top plan view of existing choke.Existing choke 100 has a toroidal core (toroidal core) 110 and the wire 120 be wound on toroidal core 110.The manufacture method of choke 100 is as follows: first, and Magnaglo (not illustrating) is pressed into toroidal core 110.Then, with the temperature sintered ring magnetic core 110 of more than 600 DEG C.Afterwards, in artificial mode, wire 120 is wound on toroidal core 110.But choke 100 need be wound around wire 120 on toroidal core 110 in artificial mode, thus cannot produce in an automated manner, therefore, the technique of choke 100 need expend sizable human cost.
Another kind of choke is composite type choke, and it adopts viscose to assemble Combined type magnetic core.So in time assembling, if the glue amount of viscose controls the surface irregularity in the assembling face of not good or magnetic core, then the phenomenon that after easily producing assembling, the variable thickness of viscose causes, thus make the inductance value variability of choke large, and then cause qualification rate to decline.In order to solve the problem, and then propose the special surface handling procedure in the assembling face strengthened assembling precision and increase magnetic core, but therefore increase the manufacturing cost of choke.
As can be seen here, with in use in structure, obviously still there is inconvenience and defect, be urgently further improved in above-mentioned existing choke.In order to solve above-mentioned Problems existing, relevant manufactures there's no one who doesn't or isn't seeks solution painstakingly, but have no applicable design for a long time to be completed by development, and common product does not have suitable structure to solve the problem, this is obviously the anxious problem for solving of relevant dealer always.Therefore how to found a kind of novel choke, one of current important research and development problem of real genus, also becomes the target that current industry needs improvement badly.
Summary of the invention
An object of the present invention is to propose a kind of choke, and its assemble stable is high, and inductance value variability is little.
Another object of the present invention is to propose a kind of choke, it utilizes automation equipment that wire is wound in hollow coil, effectively can reduce the human cost that wire is spent in wire winding (i.e. processing procedure, is all called technique herein).
Another object of the present invention is to propose a kind of choke, it can control the position of the second magnetic core array relative to the first magnetic core array to different coil of arranging in pairs or groups, and to adjust sensibility reciprocal, makes the choke of different sensibility reciprocal can use identical magnetic core, thus saves die cost.
Another object of the present invention is to propose a kind of choke, when it has metallic channel, effectively can reduce the outward appearance width of choke and the distance of overhang, and the bonding pads separation on wiring board can be made to reduce.
Another object of the present invention is to propose a kind of choke, its opening is arranged at there is assembling face the second magnetic core array or base plate on, center pillar is given prominence to towards assembling face, thus makes the unlikely outward appearance affecting choke of center pillar of giving prominence to.
A kind of choke that another object of the present invention is to propose has housing, packaging body, magnetic housing or magnetic core and has sidewall portion, can be used to replace Magnetic adhesive, thus effectively avoids Magnetic adhesive to overflow the problem of glue or the stream that hangs down.
The object of the invention to solve the technical problems realizes by the following technical solutions.
The method that a kind of making proposed according to the present invention has the element of inductance comprises the following steps:
With the coated hollow coil of a Magnetic adhesive to form a packaging body;
Form one first magnetic core array; And
By being configured at least partially in the hollow coil of this packaging body of this first magnetic core array.
In one embodiment of this invention, this first magnetic core array has a top, and this top connects a cylinder, and in the hollow coil that at least one Part I of this cylinder is arranged at this packaging body and this top is arranged on this packaging body.
In one embodiment of this invention, further comprising the steps of:
Form one second magnetic core array; And
This cylinder is connected with this second magnetic core array.
In one embodiment of this invention, this second magnetic core array has an opening; One Part II of this cylinder is inserted in this opening to be connected with this second magnetic core array.
In one embodiment of this invention, this packaging body makes the hollow coil of coated this pre-wound shaping of magnetic material with ejection formation or moulded section mode.
A kind of method making choke proposed according to the present invention comprises the following steps:
With the coated hollow coil of a Magnetic adhesive to form a packaging body;
Form one first magnetic core, this first magnetic core comprises a center pillar and a top, and this top connects one end of this center pillar; And
Be configured in the hollow coil of this packaging body by least one Part I of this center pillar, wherein this top is arranged on this packaging body.
In one embodiment of this invention, further comprising the steps:
Form one second magnetic core array, and this second magnetic core array has an opening, a Part II of this center pillar to be arranged in this opening and to engage with this opening.
In one embodiment of this invention, described second magnetic core array has a composition surface and relative to the assembling face on this composition surface, this end of this center pillar is suitable for being placed in this opening from this composition surface, and this opening is positioned at the center of this second magnetic core array and is communicated with this composition surface and this assembling face.
In one embodiment of this invention, described hollow coil has two ends, and these two ends are configured on this assembling face, and this second magnetic core array also has two metallic channels, is positioned at the edge of this second magnetic core array, and these two ends are through these two metallic channels.
In one embodiment of this invention, also comprise the step of formation one material layer, this material layer is configured at the inwall of this opening, and between this center pillar and this opening.
In one embodiment of this invention, this second magnetic core array is a flat board, and wherein this second magnetic core array is extrusion forming and sinters to be formed, and permeability is more than 75.
A kind of method making choke proposed according to the present invention comprises the following steps:
Form a housing;
Put a hollow coil in this housing;
Put one first magnetic core in this hollow coil;
Second magnetic core array to be configured in this housing one opening and to engage with this opening; And
One Magnetic adhesive is configured in the space between this housing and this hollow coil.
In one embodiment of this invention, described first magnetic core array comprises a top board and a center pillar, and this top board is connected to one end of this center pillar, and this center pillar and this top board are one of the forming, and this hollow coil is between this top board and this second magnetic core array of this first magnetic core array.
In one embodiment of this invention, described second magnetic core array has at least one hand-hole being positioned at the edge of this second magnetic core array, and this Magnetic adhesive is filled in the space between this housing and this hollow coil by this hand-hole.
In one embodiment of this invention, described housing is that metal or magnetic material are made.
According to a kind of element with inductance that the present invention proposes, it is characterized in that, this element with inductance has multiple outer surface, and this element with inductance comprises:
The hollow coil that one pre-wound is shaped, has two ends; And
One magnetic is arranged in the hollow coil of this pre-wound shaping, and wherein these two ends protrude from outside the plurality of outer surface, and these two ends have two pins of the element of inductance as this and connect an external circuit.
In one embodiment of this invention, these two ends protrude from the same side of one first outer surface of the plurality of outer surface, to have two pins of the element of inductance as this.
In one embodiment of this invention, these two pins are two through hole pins.
In one embodiment of this invention, these two pins are surface mount pin.
A kind of choke proposed according to the present invention comprises:
The hollow coil that one pre-wound is shaped, has two ends; And
One first magnetic core array is arranged in the hollow coil of this pre-wound shaping;
One packaging body, in order to encapsulate this pre-wound be shaped hollow coil and this first magnetic core array, to form multiple outer surfaces of this choke, wherein these two ends protrude from outside the plurality of outer surface, using as this choke two pins and connect an external circuit.
In one embodiment of this invention, the first magnetic core array comprises a top board and a center pillar, and this top board is connected to one end of this center pillar, and this center pillar and this top board are one of the forming.
In one embodiment of this invention, also comprise a magnetic base plate, this hollow coil is between this top board and this magnetic base plate of this first magnetic core array, and this center pillar is connected to form a magnetic core array with this magnetic base plate.
In one embodiment of this invention, these two pins are two through hole pins.
In one embodiment of this invention, this magnetic base plate has an opening, and wherein, the part of this magnetic center pillar to be inserted in this opening and is connected with this magnetic base plate.
In one embodiment of this invention, one surface of this base plate forms one first outer surface of the plurality of outer surface, wherein this base plate has the metallic channel that two are positioned at the edge of this base plate, and these two ends are each passed through this two metallic channels, using protrude from this first outer surface homonymy and as two pins of this choke.
Pass through technique scheme, choke provided by the invention at least has following advantages and beneficial effect: based on above-mentioned, due to choke provided by the invention be first utilize automation equipment that wire is wound in hollow coil after, again this hollow line snare is located on the center pillar of the first magnetic core array, and make one end of center pillar insert in the opening of the second magnetic core array, now hollow coil is between the top board and the second magnetic core array of the first magnetic core array, thus completes its assembling.Compared to existing technologies, choke provided by the invention, except effectively can reducing wire human cost spent in wire winding, can also improve assemble stable and reduce the variability of inductance value.
Above-mentioned explanation is only the general introduction of technical solution of the present invention, in order to technological means of the present invention can be better understood, and can be implemented according to the content of specification, and can become apparent to allow above and other object of the present invention, feature and advantage, below especially exemplified by preferred embodiment, and coordinate accompanying drawing, be described in detail as follows.
Accompanying drawing explanation
Fig. 1 is the schematic top plan view of existing choke;
Fig. 2 A is the schematic diagram of the choke of one embodiment of the invention;
Fig. 2 B is the decomposing schematic representation of the choke of Fig. 2 A;
Fig. 2 C is the elevational schematic view of the choke of Fig. 2 A;
Fig. 3 is the generalized section of the choke of another embodiment of the present invention;
Fig. 4 is the schematic perspective view of the choke of another embodiment of the present invention;
Fig. 5 is the generalized section of the choke of another embodiment of the present invention;
Fig. 6 A is the generalized section of the choke of another embodiment of the present invention;
Fig. 6 B is the schematic perspective view of the magnetic housing of Fig. 6 A;
Fig. 7 is the generalized section of the choke of another embodiment of the present invention;
Fig. 8 A is the generalized section of the choke of another embodiment of the present invention;
Fig. 8 B is the decomposing schematic representation of the choke of Fig. 8 A;
Fig. 8 C is the schematic perspective view of the choke of Fig. 8 A;
Fig. 8 D is another decomposing schematic representation of the choke of Fig. 8 A;
Fig. 8 E is the another decomposing schematic representation of the choke of Fig. 8 A;
Fig. 9 is the generalized section of the choke of another embodiment of the present invention;
Figure 10 A to Figure 10 D is the generalized section of four kinds of change structures of the magnetic core of Fig. 9;
Figure 11 A is the schematic diagram of the choke of another embodiment of the present invention;
Figure 11 B is the decomposing schematic representation of the choke of Figure 11 A;
Figure 11 C is the schematic diagram of the choke of another embodiment of the present invention;
Figure 11 D is the schematic diagram of the choke of another embodiment of the present invention;
Figure 12 is the magnetic circuit schematic diagram of choke.
Description of reference numerals: 100,300a, 300c ~ 300f, 400a ~ 400c, 500a ~ 500e, 600a, 600b, 700a-choke; 110-toroidal core; 120,420-wire; 310,310 ', 410a ~ 410c, 510a ~ 510d, 610-magnetic core; 311,311 ', 611,611 ', 711a-first magnetic core array; 312,414,414 ', 414 ", 512a ~ 512e, 614,614 ', 714a-center pillar; 312a, 312b, 513b ~ 513e, 614a, 614a '-one end; 314,314 ', 412,412 ', 514b ~ 514e, 612,612 '-top board; 314a, 612a, 612a '-bottom; 314b, 612b, 612b ', 712a-sidewall portion; 315,315 ', 617,617 ', 717a-second magnetic core array; 315a, 416a, 518a, 617a-composition surface; 315b, 416b, 518b, 617b-assemble face; 316,517,619-opening; 317a, 317b, 616-metallic channel; 318,416c-hand-hole; 320,522,620-hollow coil; 322,324-end; 323-winding section; 330-material layer; 340,440-Magnetic adhesive; 350,430-housing; 352,432-openend; 360-magnetic housing; 360a-upper surface; 360b-lower surface; 362a, 362b-openend; 416,416 ', 416 ", 516d, 516e-base plate; 370,520-packaging body; 520a-surface; 524-magnetic material; 526-bores a hole; S-winding space.
Embodiment
For further setting forth the present invention for the technological means reaching predetermined goal of the invention and take and effect, below in conjunction with accompanying drawing and preferred embodiment, to its embodiment of choke proposed according to the present invention, structure, feature and effect thereof, be described in detail as follows.
Aforementioned and other technology contents, Characteristic for the present invention, can know and present in the detailed description of following cooperation with reference to graphic preferred embodiment.By the explanation of embodiment, when can to the present invention for the technological means reaching predetermined object and take and effect obtain one more deeply and concrete understanding, however institute's accompanying drawings be only to provide with reference to and the use of explanation, be not used for being limited the present invention.
As shown in Fig. 2 A and Fig. 2 B, Fig. 2 A is the schematic diagram of the choke of one embodiment of the invention, and Fig. 2 B is the decomposing schematic representation of the choke in Fig. 2 A, and Fig. 2 C is the elevational schematic view of the choke of Fig. 2 A.In the present embodiment, choke 300a comprises magnetic core 310 and a hollow coil 320, and wherein magnetic core 310 comprises one first magnetic core array 311 and one second magnetic core array 315.
First magnetic core array 311 comprises center pillar 312 and a top board 314, and wherein one end 312b of center pillar 312 is connected to top board 314 to form a T font structure, and center pillar 312 and top board 314 are one of the forming.Second magnetic core array 315 is one dull and stereotyped, and has a composition surface 315a, and be configured at the relative dual-side of opening 316 relative to the assembling face 315b of composition surface 315a, an opening 316 and two and be positioned at metallic channel 317a, the 317b at the edge of the second magnetic core array 315.Opening 316 is positioned at the center of the second magnetic core array 315 and communicative engagement face 315a and assembling face 315b, and wherein one end 312a of the center pillar 312 of the first magnetic core array 311 is suitable for being placed in opening 316 from composition surface 315a and engaging with opening 316.One end 312a and the juncture of opening 316 of center pillar 312 can be close-fitting and to be combined or viscose engages.In the present embodiment, the cross sectional shape of top board 314, second magnetic core array 315 and opening 316 is all circle, and center pillar 312 is a cylinder, but not as limit, for example, the shape of top board 314, second magnetic core array 315 and opening 316 also can be all rectangle, and center pillar 312 is a rectangular column.
The material of magnetic core 310 is ferrite (ferrite) material, iron or low magnetic consumption material.Ferrite (ferrite) material comprises nickel-zinc ferrite (Ni-Zn ferrite) or manganese-zinc ferrite (Mn-Znferrite).Low magnetic consumption material can be iron containing alloy, and wherein iron containing alloy can be sendust, iron nickel-molybdenum alloy, iron-nickel alloy or noncrystalline (Amorous) alloy.It should be noted that and adopt low magnetic consumption material as magnetic core 310, can permeability be improved and reach low iron loss.In the present embodiment, the first magnetic core array 311 in magnetic core 310 and the second magnetic core array 315 adopt ferrite (ferrite) material, the permeability of magnetic core 310 can be more than 75, particularly, magnetic core 310 utilizes a ferrite powder (ferritepowder) mixed adhesive, sinter (firing) through extrusion forming and formed, binder comprises polymethyl synthetic resin (Polymethylallyl (PMA) Synthesize resin).
Should be noted that at this, first magnetic core array 311 and the second magnetic core array 315 are in the process of technique, easily produce a spacing because of the impact of manufacturing tolerance in center pillar 312 and the joint of opening 316, as shown in Figure 2 C, namely the diameter of opening 316 is greater than the diameter of center pillar 312.Therefore, in the present embodiment, optionally be coated with a material layer 330 in the inwall of opening 316, also be that material layer 330 is between center pillar 312 and opening 316, spacing when reducing assembling between center pillar 312 and opening 316 on the impact of inductance value, to improve assemble stable and to reduce inductance value variability.In addition, material layer 330 can be resin colloid or magnetic colloid.It should be noted that adhesive agent when material layer 330 can directly engage with viscose with opening 316 as one end 312a of center pillar 312.
Hollow coil 320 is sheathed on the center pillar 312 of the first magnetic core array 311, and between the top board 314 and the composition surface 315a of the second magnetic core array 315 of the first magnetic core array 311.Particularly, the present embodiment utilizes automation equipment that wire is turned to hollow coil 320, wherein wire can be circle line (minimum sectional area is for circular) or lenticular wire (minimum sectional area is rectangle), and wire can be made up of copper cash outer cladding enamel-cover layer, and enamel-cover layer is an insulating barrier.Specifically, hollow coil 320 has two ends 322,324 and the winding section 323 between two ends 322,324, and winding section 323 is wound on the center pillar 312 of the first magnetic core array 311, and two ends 322,324 are through metallic channel 317a, 317b of the second magnetic core array 315 on the 315b of the assembling face of being configured at.Two ends 322,324 of hollow coil 320 can directly as outer electrode or connect lead frame (lead frame) as outer electrode, and outer electrode can be electrically connected with bore a hole fixing (through-hole mount) mode or surface mount (surface mount) mode and external circuit.
It is worth mentioning that, the second magnetic core array 315 is directly pressed on hollow coil 320, makes the second magnetic core array 315 directly be configured on hollow coil 320, and the height therefore by hollow coil 320 locates the second magnetic core array 315 position.And one end 312a of the center pillar 312 of the first magnetic core array 311 in the present embodiment trims with the assembling face 315b of the second magnetic core array 315 in fact; but in other embodiments; as shown in Figure 3; one end 312a of the center pillar 312 of the first magnetic core array 311 is through the opening 316 of the second magnetic core array 315 and the assembling face of protruding from 315b; still belong to the adoptable technical scheme of the present invention, do not depart from the present invention for protection scope.And in Fig. 3, the height that center pillar 312 protrudes from assembling face 315b extends to the length outside metallic channel 317a, 317b lower than two ends 322,324 of hollow coil 320, with the electric connection avoiding center pillar 312 to affect end 322,324 and external circuit.
In addition, choke 300a in the present embodiment optionally fills a Magnetic adhesive 340 between the first magnetic core array 311 and the second magnetic core array 315 and the winding section 323 of coated hollow coil 320 and a part for end 322,324, and the end 322,324 be not wrapped by is used as being electrically connected with external circuit.Magnetic adhesive 340 comprises a resin material and a magnetic pulverulent material, and wherein magnetic pulverulent material accounts for more than 70 percentages of the total weight of Magnetic adhesive 340, and the permeability of Magnetic adhesive 340 can be more than 6, but not as limit.Resin material is optional from polyamide 6 (Polyamide 6, PA6), polyamide 12 (Polyamide 12, PA12), polyphenylene sulfide (Polyphenylene Sulfide, PPS), polybutylene terephthalate (polybutyleneterephthalate, PBT) or ethylene-ethyl acrylate copolymer (ethylene-ethyl acrylate copolymer, EEA) one of them.Magnetic pulverulent material can be metal soft magnetic material or ferrite powder (Ferrite), wherein metal soft magnetic material can be selected from iron powder (Iron), iron alusil alloy (FeAlSi Alloy), siderochrome silicon alloy (FeCrSi Alloy) or stainless steel one of them.
Due to the choke 300a in the present embodiment be first utilize automation equipment that wire is wound in hollow coil 320 after, again hollow coil 320 snare is located on the center pillar 312 of the first magnetic core array 311, one end 312a of center pillar 312 is inserted in the opening 316 of the second magnetic core array 315 again, thus complete assembling.Compared to existing choke 100, the choke 300a in the present embodiment effectively can reduce wire human cost spent in wire winding.
In addition, the present invention can utilize control second magnetic core array 315 relative to the position of the first magnetic core array 311 to different hollow coil of arranging in pairs or groups, and to adjust sensibility reciprocal, makes the choke of different sensibility reciprocal can use identical magnetic core, thus saves die cost.Moreover be arranged at by opening 316 and have on second magnetic core array 315 of assembling face 315b, when making to utilize the position adjustment inductance value of the second magnetic core array 315, center pillar 312 can be given prominence to towards assembling face 315b, thus make the unlikely outward appearance affecting choke 300a of center pillar 312 of giving prominence to.In addition, can pass for two ends 322,324 of hollow coil 320 because the second magnetic core array 315 has metallic channel 317a, 317b, therefore the distance of two ends 322,324 and the width of choke 300a outward appearance can be reduced, and when two ends 322,324 are as outer electrode, the spacing with the weld pad of wiring board (pad) effectively can be reduced.
As shown in Fig. 2 A and Fig. 4, Fig. 4 is the schematic perspective view of the choke of another embodiment of the present invention.Choke 300c in Fig. 4 is similar to the choke 300a in Fig. 2 A, what they were different are in: the choke 300c in Fig. 4 also comprises the housing 350 that has an openend 352, and the second magnetic core array 315 ' also has at least one hand-hole 318 (Fig. 4 only illustrates to illustrate two) being arranged in the edge of the second magnetic core array 315 ', its middle shell 350 is a barrel-like structure, magnetic core 310 ' and hollow coil 320 are configured in housing 350, and the second magnetic core array 315 ' is configured at openend 352, and openend 352 exposes the assembling face 315b of the second magnetic core array 315 ', and Magnetic adhesive 340 is suitable for being filled in housing 350 via hand-hole 318, to be configured in the space between housing 350 and hollow coil 320, and coated hollow coil 320, center pillar 312 and top board 314 and part second magnetic core array 315 ' of the first magnetic core array 311.
Because the choke 300c in the present embodiment has housing 350, therefore when Magnetic adhesive 340 is filled, do not have overflow or hang down stream problem (especially the height of choke 300c is higher, as more than 10 centimetres (mm) time), the outward appearance of choke 300c is also comparatively attractive in appearance and can cover the be full of cracks (because resin material is different from copper cash thermal coefficient of expansion, thus causing choke surface to have crackle) of Magnetic adhesive 340 and prevent from getting rusty.In addition, if when the material metal of housing 350 or magnetic material, then choke 300c also has the effect preventing electromagnetic interference.If when the material of housing 350 is metal, can make heat radiation that choke 300c bulk temperature is declined, and then raising efficiency.
As shown in Fig. 2 A and Fig. 5, Fig. 5 is the generalized section of the choke of another embodiment of the present invention.Choke 300d in Fig. 5 is similar to the choke 300a in Fig. 2 A, its difference is: the making of the choke 300d in Fig. 5 first adopts the mode of ejection formation (injection molding) or moulded section (press molding) Magnetic adhesive 340 to be coated on the surrounding of hollow coil 320 to form a packaging body 370, then, packaging body 370 is sheathed on center pillar 312, make one end 312a of the center pillar 312 of the first magnetic core array 311 through hollow coil 320 and the second magnetic core array 315, and trim with the assembling face 315b of the second magnetic core array 315, thus complete the assembling of choke 300d.Because the making of the choke 300d in the present embodiment first Magnetic adhesive 340 is coated on after hollow coil 320 forms packaging body 370, then be assembled on magnetic core 310, therefore can avoid excessive glue or the problem of the stream that hangs down.And, form Magnetic adhesive by injection and moulded section, make the density of Magnetic adhesive in packaging body 370 can improve and then improve permeability, therefore under the condition reaching identical inductance value, choke 300d can have less volume compared with choke 300a, 300c.
As shown in Fig. 2 A, Fig. 6 A and Fig. 6 B, Fig. 6 A is the generalized section of the choke of another embodiment of the present invention, and Fig. 6 B is the schematic perspective view of the magnetic housing of Fig. 6 A.The choke 300e of Fig. 6 A is similar to the choke 300a of Fig. 2 A, its difference is: the choke 300e in Fig. 6 A replaces the Magnetic adhesive 340 of Fig. 2 A by a magnetic housing 360, wherein magnetic housing 360 has a upper surface 360a, relative to lower surface 360b and two openend 362a, 362b of upper surface 360a, openend 362a, 362b lay respectively at upper surface 360a and lower surface 360b, and openend 362a, 362b interconnect.Specifically, hollow coil 320 is configured in magnetic housing 360, and the center pillar 312 of the first magnetic core array 311 runs through these openends 362a, 362b of magnetic housing 360, make the upper surface 360a of the top board 314 breasting magnetic housing 360 of the first magnetic core array 311, and the second magnetic core array 315 is configured on the lower surface 360b of magnetic housing 360.Because the choke 300e in the present embodiment replaces Magnetic adhesive 340 by magnetic housing 360, therefore do not have excessive glue or the problem of the stream that hangs down.
As shown in Fig. 2 A and Fig. 7, Fig. 7 is the generalized section of the choke of another embodiment of the present invention.Choke 300f in Fig. 7 is similar to the choke 300a in Fig. 2 A, its difference is: the top board 314 ' of first magnetic core array 311 ' of the choke 300f in Fig. 7 have one bottom 314a and two sidewall portion 314b, wherein these sidewall portions 314b is configured at the relative dual-side of bottom 314a, and the bearing of trend of these sidewall portions 314b is substantially perpendicular to the bearing of trend of bottom 314a.The bearing of trend of these sidewall portions 314b is parallel to the bearing of trend of center pillar 312, and the height of sidewall portion 314b can be identical with the height of center pillar 312, and the second magnetic core array 315 is configured between these sidewall portions 314b.And Magnetic adhesive 340 is filled between these sidewall portions 314b of the first magnetic core array 311, and the winding section 323 of coated hollow coil 320 and portions end (not shown).Choke 300f in the present embodiment, by the setting of sidewall portion 314b, therefore can improve Magnetic adhesive 340 and to overflow the problem of glue or the stream that hangs down.
As shown in Fig. 8 A, Fig. 8 B and Fig. 8 C, Fig. 8 A is the generalized section of the choke of another embodiment of the present invention, and Fig. 8 B is the decomposing schematic representation of the choke in Fig. 8 A, and Fig. 8 C is the schematic perspective view of the choke in Fig. 8 A.Should be noted that at this, for convenience of description, Fig. 8 B omits and illustrates Magnetic adhesive 340.In the present embodiment, choke 400a comprises a magnetic core 410a, at least one wire 420 and a housing 430.Specifically, magnetic core 410a comprises top board 412, center pillar 414 and a base plate 416, and base plate 416 has a composition surface 416a, relative to the assembling face 416b of composition surface 416a and at least one hand-hole 416c (illustrating in Fig. 8 C to illustrate two), wherein center pillar 414 is configured between top board 412 and base plate 416, and forms a winding space S between top board 412, center pillar 414 and base plate 416.Magnetic core 410a material and manufacture method identical with magnetic core 310, therefore not repeat them here.In the present embodiment, the top board 412 of magnetic core 410a, center pillar 414 and base plate 416 are one of the forming and form drum type magnetic core (drum-core) structure.
Wire 420 to be wound on center pillar 414 and to be positioned at winding space S, wherein wire 420 can be round line (minimum sectional area is for circular) or lenticular wire (minimum sectional area is rectangle), and wire 420 can be made up of copper cash outer cladding enamel-cover layer, and enamel-cover layer is an insulating barrier.In addition, wire 420 can utilize automation equipment to be wound on the center pillar 414 of magnetic stamen 410a by wire 420, and the present embodiment does not limit the quantity of wire 420, and namely wire 420 can be one or more.
Housing 430 is for having the barrel-like structure of an openend 432, and wherein magnetic core 410a and wire 420 are configured in housing 430, and openend 432 exposes the assembling face 416b of the base plate 416 of magnetic core 410a.
In addition, the choke 400a in the present embodiment also comprises a Magnetic adhesive 440, and wherein Magnetic adhesive 440 is suitable for being filled in housing 430 via hand-hole 416c, to fill up winding space S and coated wire 420 and part magnetic core 410a.The material of Magnetic adhesive 440 is identical with Magnetic adhesive 340, therefore does not repeat them here.
Because the choke 400a in the present embodiment has housing 430, do not have overflow when therefore Magnetic adhesive 430 is filled or the problem of the stream that hangs down, and the outward appearance of choke 400a is also comparatively attractive in appearance and can cover the be full of cracks of Magnetic adhesive and prevent from getting rusty.In addition, when the material of housing 430 be metal or magnetic material time, then choke 400a can have the effect preventing electromagnetic interference.When the material of housing 430 is metal, can make heat radiation that choke 400a bulk temperature is declined, and then raising efficiency.
It is worth mentioning that, the present invention does not limit the form of magnetic core 410a, in other embodiments, as in fig. 8d, the magnetic core 410b of choke 400b also can be made up of a top board 412 ', a center pillar 414 ' and a base plate 416 ', wherein center pillar 414 ' and top board 412 ' are one of the forming, base plate 416 ' utilizes bonding mode to be connected with one end of center pillar 414 ', or center pillar 414 ', top board 412 ' and base plate 416 ' all utilize bonding mode to be connected, and wire 420 is a hollow coil and is sheathed on center pillar 414 '.As illustrated in fig. 8e; the magnetic core 410c of choke 400c is also by a center pillar 414 " and a base plate 416 " form, wherein, wire 420 is a hollow coil and is sheathed on center pillar 414 " on; still belong to the adoptable technical scheme of the present invention, do not depart from the scope that the present invention institute wish is protected.
As shown in Figure 9, Fig. 9 is the generalized section of the choke of another embodiment of the present invention.In the present embodiment, choke 500a comprises a magnetic core 510a and a packaging body 520, wherein magnetic core 510a comprises a center pillar 512a, and packaging body 520 is sheathed on the center pillar 512a of magnetic core 510a, and packaging body 520 comprises the magnetic material 524 of a hollow coil 522 and a coated hollow coil 522.Packaging body 520 makes the surrounding of the coated hollow coil 522 of magnetic material 524 in the mode of ejection formation (injection molding) or moulded section (press molding) and formed, and packaging body 520 has a perforation 526 for the center pillar 512a arranging magnetic core 510a.In the present embodiment, the height of packaging body 520 equals the length of center pillar 512b, and the two ends of center pillar 512b and the surface of packaging body 520 are trimmed.The material of magnetic core 510a is identical with magnetic core 310, and hollow coil 522 is identical with hollow coil 320, and the material of magnetic material 524 is identical with Magnetic adhesive 340, therefore does not repeat them here.
The making of the choke 500a in the present embodiment first forms packaging body 520, then by the center pillar 512a of magnetic core 510a through hollow coil 522, thus form choke 500a.And accessible effect of choke 500a in the present embodiment is identical with choke 300d, therefore be not repeated herein.
Structure about magnetic core 510a is not limited to structure disclosed in Fig. 9, and magnetic core 510a also can be structure disclosed in Figure 10 A to Figure 10 D.In detail, as shown in Figure 10 A, the magnetic core 510b of choke 500b also comprises a top board 514b, wherein center pillar 512b and top board 514b is one of the forming, and one end 513b of center pillar 512b is sheathed in packaging body 520, one end 513b of meaning and center pillar 512b is not exposed to outside packaging body 520, and the height of packaging body 520 is greater than the length of center pillar 512b.As shown in Figure 10 B, the magnetic core 510c of choke 500c also comprises a top board 514c, wherein center pillar 512c and top board 514c is one of the forming, and one end 513c of center pillar 512c is through trimming in fact in packaging body 520 with the surperficial 520a of packaging body 520 away from top board 514c.As illustrated in figure 10 c, the magnetic core 510d of choke 500d also comprises an a top board 514d and base plate 516d, wherein top board 514d and center pillar 512d is one of the forming, and one end 513d of center pillar 512d is through trimming in fact in packaging body 520 with the surperficial 520a of packaging body 520 away from top board 514d, and base plate 516d covers one end 513d of center pillar 512d and the surperficial 520a of packaging body 520.As shown in Figure 10 D, the magnetic core 510e of choke 500e also comprises an a top board 514e and base plate 516e, wherein top board 514e and center pillar 512e is one of the forming, and base plate 516e has the assembling face 518b of opening 517, composition surface 518a and relative to composition surface 518a.One end 513e of center pillar 512e is through being placed in opening 517 in packaging body 520 from composition surface 518a, and one end 513e of center pillar 512e trims with assembling face 518b in fact.
As shown in Figure 11 A and Figure 11 B, Figure 11 A is the schematic diagram of the choke of another embodiment of the present invention, and Figure 11 B is the decomposing schematic representation of the choke in Figure 11 A.In the present embodiment, choke 600a comprises magnetic core 610 and a hollow coil 620.Specifically, magnetic core 610 comprises one first magnetic core array 611 and one second magnetic core array 617.First magnetic core array 611 comprises top board 612, center pillar 614 and at least one metallic channel 616 (schematically illustrating two in Figure 11 A), wherein center pillar 614 and top board 612 are one of the forming, and top board 612 has 612a and bottom surrounds center pillar 614 around the sidewall portion 612b configured around the 612a of bottom, sidewall portion 612b.The diameter of center pillar 614 is less than the bottom 612a length on one side of top board 612, and the bearing of trend of sidewall portion 612b is substantially perpendicular to the bearing of trend of bottom 612a.The bearing of trend of sidewall portion 612b is parallel to the bearing of trend of center pillar 614.Metallic channel 616 is configured at the sidewall portion 612b of top board 612, and the width of metallic channel 616 can according to the wire diameter design of configuration hollow coil 620.
Second magnetic core array 617 is one dull and stereotyped and have a composition surface 617a, relative to the assembling face 617b of composition surface 617a and an opening 619.Opening 619 is positioned at the center of the second magnetic core array 617 and communicative engagement face 617a and assembling face 617b.One end 614a of center pillar 614 is suitable for being placed in opening 619 from composition surface 617a.Particularly, the height of the sidewall portion 612b of top board 612 can be identical with the height of center pillar 614, and the second magnetic core array 617 is configured between sidewall portion 612b.The material of the magnetic core 610 in the present embodiment is identical with magnetic core 310, therefore does not repeat them here.In the present embodiment, center pillar 614 can be a cylinder, and the shape of the bottom 612a of the second magnetic core array 617, opening 619, top board 612 all can be circle, and the diameter of opening 619 is more than or equal to the diameter of center pillar 617.
Hollow coil 620 is sheathed on center pillar 614, and between the top board 612 and the second magnetic core array 617 of the first magnetic core array 611, wherein the height of hollow coil 620 is less than the height of the sidewall portion 612b of top board 612, and sidewall portion 612b at least contacts with part hollow coil 620.About the manufacture method of hollow coil 620, material are identical with hollow coil 320 with structure, therefore be not repeated herein.
It is worth mentioning that, the second magnetic core array 617 in the present embodiment is directly pressed on hollow coil 620, the second magnetic core array 617 is made directly to be configured on hollow coil 620, therefore the height by hollow coil 620 locates the second magnetic core array 617 position, and in the present embodiment, center pillar 614 one end 614a of the first magnetic core array 611 trims with the assembling face 617b of the second magnetic core array 617 in fact, but in other embodiments, center pillar 614 one end 614a of the first magnetic core array 611 can through the opening 619 of the second magnetic core array 617 the assembling face of protruding from 617b, wherein center pillar 614 height that protrudes from assembling face 617b extends to the length outside metallic channel 616 lower than two ends of hollow coil 620, still belong to the adoptable technical scheme of the present invention, do not depart from the present invention for protection scope.
In addition, in the present embodiment, be optionally coated with a material layer 630 in junction with opening 619 of center pillar 614, spacing when reducing assembling between center pillar 614 and opening 619 is on the impact of inductance value.In addition, material layer 630 can be resin colloid or magnetic colloid.Certainly, in preferred embodiment, the diameter of the center pillar 614 of the first magnetic core array 611 equals the diameter of the opening 619 of the second magnetic core array 617.
In addition, the present invention does not limit the form of the first magnetic core array 611 and the second magnetic core array 617, although mentioned herein and the bottom 612a shape of top board 612 of the first magnetic core array 611 be circular, and the shape of the second magnetic core array 617 is circular, but in other embodiments, as shown in Figure 11 C, the bottom 612a ' of the top board 612 ' of the first magnetic core array 611 ' can also be rectangle, and sidewall portion 612b ' configures around the rectangular circumference of bottom 612a ', second magnetic core array 617 ' is arranged in sidewall portion 612b ' and shape is circular, still belong to the adoptable technical scheme of the present invention, do not depart from the present invention for protection scope.
Choke 600a in the present embodiment is after first utilizing automation equipment that wire is wound in hollow coil 620, again hollow line 620 snare is located on the center pillar 614 of the first magnetic core array 611, and make one end 614a of center pillar 614 insert in the opening 619 of the second magnetic core array 617, now hollow coil 620 is between the top board 612 and the second magnetic core array 617 of the first magnetic core array 611, thus completes assembling.Compared to existing technologies, choke 600a in the present embodiment can effectively reduce outside wire human cost spent in wire winding, also can selectively in junction with opening 619 of center pillar 614, improve assemble stable and reduce inductance value variability by coating material 630.
Because the choke 600a in the present embodiment utilizes the sidewall portion 612b of top board 612 to come the surrounding of coated hollow coil 620 to replace Magnetic adhesive, therefore except not having excessive glue or hanging down except the problem of stream, also can reduce processing step and then reduce manufacturing cost.In addition, control second magnetic core array 617 can be utilized relative to the position of the first magnetic core array 611 to different hollow coil of arranging in pairs or groups, to adjust sensibility reciprocal, make the choke of different sensibility reciprocal can use identical magnetic core, thus save die cost.Moreover be arranged at by opening 619 and have on second magnetic core array 617 of assembling face 617b, when making to utilize the position adjustment inductance value of the second magnetic core array 617, center pillar 614 can be given prominence to towards assembling face 617b, thus make the unlikely outward appearance affecting choke 600a of center pillar 617 of giving prominence to.
In addition, as shown in Figure 11 A and Figure 11 D, Figure 11 D is the generalized section of the choke of another embodiment of the present invention.Choke 600b in Figure 11 D is similar to the choke 600a in Figure 11 A, its difference is, the height of the sidewall portion 612b ' of the first magnetic core array 611 ' of the magnetic core 610 ' of the choke 600b in Figure 11 D is lower than the height of center pillar 614 ', one end 614a ' of center pillar 614 ' is suitable for being placed in the opening 619 and two ends of the second magnetic core array 617 from the composition surface 617a of the second magnetic core array 617 and is configured at sidewall portion 612b ', that is the second magnetic core array 617 is located by sidewall portion 612b '.In the present embodiment, also utilize sidewall portion 612b ' to replace Magnetic adhesive, therefore except not having excessive glue or hanging down except the problem of stream, also can reduce processing step and then reduce manufacturing cost.
The choke 100 of more existing Fig. 1 and part choke 300a, 300c, 300d, 600a, 600b of the present embodiment is come below by proposing measured result.
[first group of measured result]
The material of magnetic core identical and the existing choke 100 that volume is close and the choke 300a in the present embodiment Fig. 2 A are compared in this actual measurement.Table one exports the experimental data that 12 volts turn the choke 100 of the 5 volts of gained choke 300a identical with three for power supply unit.Table two exports the experimental data that 12 volts turn the choke 100 of the 3.3 volts of gained choke 300a identical with three for power supply unit.
Table one
Table two
Known according to table one and table two, choke 100 and choke 300a are under identical electric current, and the efficiency of choke 300a is all high than existing choke 100.In other words, the design of the magnetic core 310 of choke 300a has progressive compared to the Magnetic Core Design of existing choke 100.
[second group of measured result]
The material of magnetic core identical and the existing choke 100 that volume is close and the choke 300c in the present embodiment Fig. 4 are compared in this actual measurement.Table three exports the experimental data that 12 volts turn the choke 100 of the 5 volts of gained choke 300c identical with four for power supply unit, and table four exports the experimental data of the choke 100 of the 12 volts turns of 3.3 volts of gained choke 300c identical with four for power supply unit.
Table three
Table four
Known according to table three and table four, choke 100 and choke 300c are under identical electric current, and choke 300c is all high than existing choke 100 in the efficiency of underloading heavy (50% load-carrying).
[the 3rd group of measured result]
The material of magnetic core identical and the existing choke 100 that volume is close and the choke 300d in the present embodiment Fig. 5 are compared in this actual measurement.Table five is expressed as power supply unit and exports the choke 200 of 12 volts turns of 3.3 volts of gained and the experimental data of choke 300d.
Table five
Known according to table five, choke 100 and choke 300d are under identical electric current, and choke 300d is all high than existing choke 100 in the efficiency that underloading is heavy.
[the 4th group of measured result]
This actual measurement is tested for the impact of monolateral spacing on the initial sensibility reciprocal of choke 300a of center pillar 312 with the joint of opening 316, and wherein the thickness of the second magnetic core array 315 is 2.5 centimetres (mm).Table six is the experimental data of monolateral spacing to the initial sensibility reciprocal of choke 300a.
Table six
Known according to table six, when monolateral spacing is 0.1 centimetre (mm), initial sensibility reciprocal declines 6.91%; When monolateral spacing is larger (being such as 0.4 centimetre (mm)), initial sensibility reciprocal declines larger (17.51%).That is, in the manufacture process of choke 300a, the spacing that center pillar 312 and the joint place of opening 316 produce can affect the variability of inductance value.
Test for the initial sensibility reciprocal of center pillar 312 with joint encapsulant layer 340 couples of choke 310a of opening 316 below, wherein the thickness of the second magnetic core array 315 is 2.5 centimetres (mm).Table seven is the experimental data of layer thickness to initial sensibility reciprocal.
Table seven
Known according to table seven, when magnetic material layer 330 thickness thickens to 0.4 centimetre (mm) from 0.1 centimetre (mm), sensitivity changes amount is still less than 5%, that is, for Figure 18, the impact of spacing on initial sensibility reciprocal that material layer 330 thickness produces than the joint place of center pillar 312 and opening 316 impact of initial sensibility reciprocal is little.In other words, optionally encapsulant layer 330 can be provided to reduce the variability of the inductance value produced because of manufacturing tolerance.
Be that 3 centimetres (mm) test with the thickness of the second magnetic core array 315 below, table eight is the experimental data of layer thickness to initial sensibility reciprocal.
Table eight
According to table eight and comparison sheet seven, when the second magnetic 315 is increased to 3 centimetres (mm) from 2.5 centimetres (mm), sensitivity changes amount only improves 0.81% compared with time 2.5 centimetres (mm), and material layer 330 thickness is when being 0.4 centimetre (mm), sensibility reciprocal impact is still less than 5%, that is, center pillar 312 affects more effective than the thickness of increase by second magnetic core array 315 on sensibility reciprocal with the joint coating material 330 of opening 316.
[the 5th group of measured result]
This actual measurement is simulate for the impact of presence or absence metallic channel 616 on sensibility reciprocal of the choke 600a in Figure 11 A, and wherein the wire diameter of hollow coil 620 is 1 centimetre (mm), and coil 5.5 encloses, DC impedance 0.5 ohm (m Ω).From the result simulated, when choke 600a is without metallic channel 616, sensibility reciprocal is about 3.3 microhenries (μ H); When choke 600a has metallic channel 616, sensibility reciprocal is about 3.43 microhenries (μ H), and that is, with or without metallic channel 616, sensibility reciprocal difference is 4%.
Then, the impact of width on sensibility reciprocal for metallic channel 616 is tested, and wherein the material of first magnetic core array 611 of choke 600a is sendust, and its permeability is 125.Table nine is the experimental data of metallic channel spacing to sensibility reciprocal.
Table nine
Known according to table nine, when the spacing of metallic channel 616 is changed to 4.8mm by 1.6mm, the rate of descent of the sensibility reciprocal of choke 600a is below 3%.Arranging the impact of sensibility reciprocal of visible metallic channel 616 is little.
[the 6th group of measured result]
Carry out the experiment of equivalent magnetic circuit below for the choke 600a of Figure 11 A and the choke 600b of Figure 11 D, wherein the material of the magnetic core of these chokes is all identical with volume size.Figure 12 is the magnetic circuit schematic diagram of choke, for convenience of description, Figure 12 only illustrates the first magnetic core array and second magnetic core array of magnetic core, Figure 12 (a) represents on the center pillar 714a and sidewall portion 712a that the second magnetic core array 717a is positioned at the first magnetic core array 711a, and the second magnetic core array 717a imperforation, Figure 12 (b) represents choke 600a, namely the second magnetic core array 617 is configured between sidewall portion 612b, Figure 12 (c) represents choke 600b, and namely the two ends of the second magnetic core array 617 are configured on sidewall portion 612b '.Fine dotted line represents spacing (only illustrating monolateral), and thick dashed line represents equivalent magnetic circuit path (only illustrating monolateral).Table ten is the experimental data of monolateral spacing to the permeability of equivalent magnetic circuit.
Table ten
Known according to table ten, monolateral spacing is on the impact of permeability, and choke 600a is minimum, and choke 600b takes second place, and choke 700a is maximum.Visible, the choke 600a that the present invention proposes and choke 600b effectively can reduce the impact of monolateral spacing on permeability, thus makes choke 600a, 600b have larger inductance value compared to choke 700a.
In sum, choke 300a, 300c provided by the invention ~ 300f, 400a ~ 400c, 500a ~ 500e, 600a, 600b at least has following advantages:
1. the assemble stable of choke is high, can reduce inductance value variability.
2. the efficiency of choke provided by the invention is greater than the efficiency of existing choke.
3. can utilize automation equipment that wire is wound in hollow coil, effectively can reduce the human cost that wire is spent in wire winding.
4. can control the position of the second magnetic core array relative to the first magnetic core array to different coil of arranging in pairs or groups, to adjust sensibility reciprocal, make the choke of different sensibility reciprocal can use identical magnetic core, thus save die cost.
5., when choke has metallic channel, effectively can reduce the outward appearance width of choke and the distance of overhang, and the bonding pads separation on wiring board can be made to reduce.
6. opening is arranged on second magnetic core array with assembling face or base plate, center pillar is given prominence to towards assembling face, thus make the unlikely outward appearance affecting choke of center pillar of giving prominence to.
7. choke has housing, packaging body, magnetic housing or magnetic core and has sidewall portion, can be used to replace Magnetic adhesive, thus effectively avoid Magnetic adhesive overflow glue or hang down stream problem.
The above is only preferred embodiment of the present invention, not any pro forma restriction is done to the present invention, although the present invention discloses as above with preferred embodiment, but and be not used to limit the present invention, any those skilled in the art, do not departing within the scope of technical solution of the present invention, make a little change when the technology contents of above-mentioned announcement can be utilized or be modified to the Equivalent embodiments of equivalent variations, in every case be the content not departing from technical solution of the present invention, according to any simple modification that technical spirit of the present invention is done above embodiment, equivalent variations and modification, all still belong in the scope of technical solution of the present invention.
Claims (25)
1. making has a method for the element of inductance, it is characterized in that, comprises the following steps:
With the coated hollow coil of a Magnetic adhesive to form a packaging body;
Form one first magnetic core array; And
By being configured at least partially in the hollow coil of this packaging body of this first magnetic core array.
2. method according to claim 1, is characterized in that, this first magnetic core array has a top, and this top connects a cylinder, and in the hollow coil that at least one Part I of this cylinder is arranged at this packaging body and this top is arranged on this packaging body.
3. method according to claim 2, is characterized in that, further comprising the steps of:
Form one second magnetic core array; And
This cylinder is connected with this second magnetic core array.
4. method according to claim 3, is characterized in that, this second magnetic core array has an opening; One Part II of this cylinder is inserted in this opening to be connected with this second magnetic core array.
5. method according to claim 1, is characterized in that, the hollow coil that this packaging body makes magnetic material this pre-wound coated be shaped with ejection formation or moulded section mode.
6. make a method for choke, it is characterized in that, comprise the following steps:
With the coated hollow coil of a Magnetic adhesive to form a packaging body;
Form one first magnetic core, this first magnetic core comprises a center pillar and a top, and this top connects one end of this center pillar; And
Be configured in the hollow coil of this packaging body by least one Part I of this center pillar, wherein this top is arranged on this packaging body.
7. method according to claim 6, is characterized in that, further comprising the steps:
Form one second magnetic core array, and this second magnetic core array has an opening, a Part II of this center pillar to be arranged in this opening and to engage with this opening.
8. method according to claim 7, it is characterized in that, described second magnetic core array has a composition surface and relative to the assembling face on this composition surface, this end of this center pillar is suitable for being placed in this opening from this composition surface, and this opening is positioned at the center of this second magnetic core array and is communicated with this composition surface and this assembling face.
9. method according to claim 8, it is characterized in that, described hollow coil has two ends, and these two ends are configured on this assembling face, this second magnetic core array also has the metallic channel that two are positioned at the edge of this second magnetic core array, and these two ends are through these two metallic channels.
10. method according to claim 7, is characterized in that, also comprises the step of formation one material layer, and this material layer is configured at the inwall of this opening, and between this center pillar and this opening.
11. methods according to claim 7, is characterized in that, this second magnetic core array is a flat board, and wherein this second magnetic core array is extrusion forming and sinters to be formed, and permeability is more than 75.
12. 1 kinds of methods making choke, is characterized in that, comprise the following steps:
Form a housing;
Put a hollow coil in this housing;
Put one first magnetic core in this hollow coil;
Second magnetic core array to be configured in this housing one opening and to engage with this opening; And
One Magnetic adhesive is configured in the space between this housing and this hollow coil.
13. methods according to claim 12, it is characterized in that, described first magnetic core array comprises a top board and a center pillar, and this top board is connected to one end of this center pillar, this center pillar and this top board are one of the forming, and this hollow coil is between this top board and this second magnetic core array of this first magnetic core array.
14. methods according to claim 13, is characterized in that, described second magnetic core array has at least one hand-hole being positioned at the edge of this second magnetic core array, and this Magnetic adhesive is filled in the space between this housing and this hollow coil by this hand-hole.
15. methods according to claim 12, is characterized in that, described housing is that metal or magnetic material are made.
16. 1 kinds of elements with inductance, it is characterized in that, this element with inductance has multiple outer surface, and this element with inductance comprises:
The hollow coil that one pre-wound is shaped, has two ends; And
One magnetic is arranged in the hollow coil of this pre-wound shaping, and wherein these two ends protrude from outside the plurality of outer surface, and these two ends have two pins of the element of inductance as this and connect an external circuit.
17. elements with inductance according to claim 16, is characterized in that, these two ends protrude from the same side of one first outer surface of the plurality of outer surface, to have two pins of the element of inductance as this.
18. elements with inductance according to claim 16, is characterized in that, these two pins are two through hole pins.
19. elements with inductance according to claim 16, is characterized in that, these two pins are surface mount pin.
20. 1 kinds of chokes, is characterized in that, comprising:
The hollow coil that one pre-wound is shaped, has two ends; And
One first magnetic core array is arranged in the hollow coil of this pre-wound shaping;
One packaging body, in order to encapsulate this pre-wound be shaped hollow coil and this first magnetic core array, to form multiple outer surfaces of this choke, wherein these two ends protrude from outside the plurality of outer surface, using as this choke two pins and connect an external circuit.
21. chokes according to claim 20, is characterized in that, described first magnetic core array comprises a top board and a center pillar, and this top board is connected to one end of this center pillar, and this center pillar and this top board are one of the forming.
22. chokes according to claim 21, is characterized in that, also comprise a magnetic base plate, and this hollow coil is between this top board and this magnetic base plate of this first magnetic core array, and this center pillar is connected to form a magnetic core array with this magnetic base plate.
23. chokes according to claim 20, is characterized in that, these two pins are two through hole pins.
24. chokes according to claim 22, is characterized in that, this magnetic base plate has an opening, and wherein, the part of this magnetic center pillar to be inserted in this opening and is connected with this magnetic base plate.
25. chokes according to claim 22, it is characterized in that, one surface of this base plate forms one first outer surface of the plurality of outer surface, wherein this base plate has the metallic channel that two are positioned at the edge of this base plate, and these two ends are each passed through this two metallic channels, using protrude from this first outer surface homonymy and as two pins of this choke.
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|---|---|---|---|
| CN201510140217.7A CN104700984A (en) | 2009-07-09 | 2009-07-09 | Chocker |
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| CN201510140217.7A CN104700984A (en) | 2009-07-09 | 2009-07-09 | Chocker |
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| CN2009101589489A Division CN101944417A (en) | 2009-07-09 | 2009-07-09 | Choke |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107393688A (en) * | 2016-05-16 | 2017-11-24 | 深圳市京泉华科技股份有限公司 | Magnetic core and the inductance device for having the magnetic core |
| CN108414110A (en) * | 2018-02-09 | 2018-08-17 | 陈景超 | Induction temperature sensing device and temp measuring method, cooker and calutron |
| WO2018149658A1 (en) * | 2017-02-17 | 2018-08-23 | Robert Bosch Gmbh | Control electronics having a magnetic flux guide element |
-
2009
- 2009-07-09 CN CN201510140217.7A patent/CN104700984A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107393688A (en) * | 2016-05-16 | 2017-11-24 | 深圳市京泉华科技股份有限公司 | Magnetic core and the inductance device for having the magnetic core |
| WO2018149658A1 (en) * | 2017-02-17 | 2018-08-23 | Robert Bosch Gmbh | Control electronics having a magnetic flux guide element |
| CN110326066A (en) * | 2017-02-17 | 2019-10-11 | 罗伯特·博世有限公司 | Control electronics with flux guide elements |
| CN108414110A (en) * | 2018-02-09 | 2018-08-17 | 陈景超 | Induction temperature sensing device and temp measuring method, cooker and calutron |
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