CN201667268U

CN201667268U - Hot-pressing combined type magnetic inductance component

Info

Publication number: CN201667268U
Application number: CN2009201739994U
Authority: CN
Inventors: 沈学荣
Original assignee: JUCI INDUSTRY Co Ltd
Current assignee: JUCI INDUSTRY Co Ltd; Curie Ind Co Ltd
Priority date: 2009-10-27
Filing date: 2009-10-27
Publication date: 2010-12-08
Anticipated expiration: 2019-10-27

Abstract

The utility model provides a hot-pressing combined type magnetic inductance component which is formed as follows: a magnetic core is combined by hot pressing, a coil is assembled and magnetic glue is used for sealing, thus leaving no air gap between the magnetic core and packaging material, and further avoiding gap energy loss, reducing loss of an equipment/mold and improving the magnetic circuit and inductance values.

Description

Hot pressing composite type magnetic inductance element

Technical field

The utility model is relevant for a kind of hot pressing composite type magnetic inductance element that applies to relevant magnetic products such as big electric current energy storage inductor, electronic component and Electromagnetic Control element.

Background technology

For overcoming conventional magnetic element coiling problem, industry changes gradually adopts the column magnetic core, shown in Figure 11, traditional open column magnetic core element cutaway view, its product is except forming the magnetic line of force M loop around the current-carrying coil 1, all present the radiation wire mostly by the outside loss in magnetic core 2 centers, this is the EMI main source, and its magnetic line of force path is all outer exposes to the sun in air, there is no the function that strengthens magnetic field induction.

For improving open magnetic element shortcoming, market many with magnetic core 2 outside increase an enclosing cover 3 modes in response to, be commonly called as combined magnetic core element (Drum Core), shown in Figure 12, the box-like magnetic core element cutaway view of traditional group, the combined magnetic core element is compared to open element, and it has two obvious advantages:

1. increase and add the magnetic line of force in the magnetic material path, the output of reinforcement global magnetic field intensity.

2. enclosing cover guides to the magnetic line of force in the enclosing cover material, reduces magnetic line of force loss.

But this kind design still has assembly space (Air Gap) problem, because adopting assembling mode constitutes, so in the assembly assembly space 31 (as figure bend zone) must be arranged, the gap energy loss (Gap Loss) more than 50% will be caused in this part space, and this gap also can form coil or plug and cause the magnetic noise with the magnetic field vibration in addition.

Summary of the invention

The purpose of this utility model is exactly the defective that overcomes open column magnetic core element of above-mentioned known tradition and combined magnetic core element, a kind of novel hot pressing composite type magnetic inductance element is provided, it makes the magnetic core of magnetic inductance element and encapsulating material not have gap (Air Gap), avoids gap energy loss (Gap Loss), reduction equipment/mould consume according to this and can promote magnetic circuit and sense value.

The utility model purpose is come by following technical proposals, hot pressing composite type magnetic inductance element provided by the utility model, its structure be the magnetic shield lower cover that will include the magnetic shield loam cake of current-carrying coil, magnetic core, magnetic colloid and include current-carrying coil, magnetic core, magnetic colloid, insulator foot, conducting end with hot pressing mode in conjunction with realizing its hot pressing composite type magnetic inductance element.

The utility model hot pressing composite type magnetic inductance element, its structure is with the combination of coil magnetic core, magnetic glue and this magnetic inductance element of hot-forming formation.

The utility model technological improvement focuses on:

1. avoid the gap energy loss: the hot-pressing technique and the magnetic shield material that use No. 200910151966.4 application for a patent for invention cases of China " hot-forming magnetic element manufacture method and product ", magnetic core and magnetic shield material are combined closely, avoid gap energy loss problem (Gap Loss).

2. reduce the EMI interference problem:,, reduce the EMI interference problem according to this so can effectively suppress magnetic line of force loss because this element is closely coated by the magnetic shield material comprehensively.

3. stop the broken skin problem of coil scratch: traditional one-body molded magnetic element, because high-pressure molding can allow powder friction copper cash, cause scratch break skin, and coil of the present utility model is to adopt the upper and lower cover combining structure, break the skin problem so can effectively stop the coil scratch.

4. assemble the contraposition problem: when the similar products upper and lower cover makes up on the market, the contraposition problem is often arranged, be provided with the design of contraposition trip in the utility model structure, can improve to the bit shift problem.

5. overcome the magnetic noise problem: though traditional assembly type element has encapsulating, but because component body still has opening surface and coil direction design problem, so being difficult to reach the full inside of body all fills viscose and fixed magnetic core or coil, to form the magnetic noise indirectly, the utility model designs upper and lower magnetic lid and is the sealing hollow cavity in conjunction with the back, only reserve the encapsulating mouth and make it can fill whole element internal, therefore can well secured plug and coil, and then overcome the magnetic noise problem.

6. special magnetic viscose provides complete magnetic-path and promotion feeling value: the employed viscose of the utility model, contain Magnaglo, and can become magnetic line of force path, lift elements sense value simultaneously so fill up the element internal space.

7. reduce briquetting pressure and man-hour: traditional one-body molded magnetic element, coat coil fully and form component body by Magnaglo, but the utility model is the composite type upper and lower cover, fill volume tradition is one-body molded few, so pressure reduces during moulding, board/die wear can be reduced, and obviously molding time can be reduced.

Below just relevant technology contents of the present utility model and detailed description, existing conjunction with figs. and given embodiment describe as follows.

Description of drawings

Fig. 1 is the utility model finished product cutaway view;

Fig. 2 is the utility model finished product filling magnetic line of force cutaway view;

Fig. 3 is another embodiment finished product cutaway view of the utility model;

Fig. 4 is another embodiment finished product filling magnetic line of force cutaway view of the utility model;

Fig. 5 is the utility model magnetic shield lid and magnetic core hot binding vertical view;

Fig. 6 is the utility model magnetic shield lid and magnetic core hot binding cutaway view;

Fig. 7 is the utility model insulator foot vertical view;

Fig. 8 a, Fig. 8 b, Fig. 8 c, Fig. 8 d are various magnetic core of the utility model and magnetic shield lid combination embodiment cutaway view;

Fig. 9 a, Fig. 9 b, Fig. 9 c, Fig. 9 d are various magnetic shield lid of the utility model and magnetic core combination embodiment cutaway view;

Figure 10 a, Figure 10 b, Figure 10 c, Figure 10 d are various magnetic core of the utility model and magnetic shield lid type shape combination embodiment cutaway view;

Figure 11 is traditional open column magnetic core element cutaway view;

Figure 12 is the box-like magnetic core element cutaway view of traditional group.

Description of reference numerals: current-carrying coil-1,1A; Magnetic core-2; Enclosing cover-3; Assembly space-31; Magnetic shield loam cake-4; Tank-41; Trip-42; Ring-like hollow space-43; Magnetic shield lower cover-5; Tank-51; Trip-52; Ring-like hollow space-53; Symmetry perforation-54; Magnetic colloid-6; Insulator foot-7; Symmetry perforation-71; Symmetry perforation-72; Conducting end-8; The magnetic line of force-M.

Embodiment

See also shown in Figure 1, hot pressing composite type magnetic inductance element of the present utility model, its structure mainly comprises its current-carrying coil 1, magnetic core 2, magnetic shield loam cake 4, magnetic shield lower cover 5, magnetic colloid 6, insulator foot 7 and conducting end 8.

See also Fig. 1 and shown in Figure 7, at magnetic core 2 one ends with hot pressing mode connecting shaping magnetic shield loam cake 4 and magnetic shield lower cover 5, magnetic shield loam cake 4 and magnetic shield lower cover 5 are opening-like

interior holding groove

41,51 lids of an end, and the ora terminalis of magnetic shield lower cover 5 is provided with one group of symmetry perforation 54, this insulator foot 7 is made of tool insulating properties materials such as bakelite or anti-dragons, on it and be provided with the

symmetry perforation

71,72 corresponding with magnetic shield lower cover 5 perforation 54.

Referring to Fig. 5 and shown in Figure 6, the utility model is by being packaged in magnetic core 2 respectively in magnetic shield loam cake 4 and magnetic shield lower cover 5

tanks

41,51 earlier by hot pressing mode, and magnetic core 2 magnetic shield loam cakes 4 and magnetic shield lower cover 5 and magnetic core 2 be combined as a whole, it is in conjunction with forming ring-like

hollow spaces

43,53 in the

rear containing groove

41,51.

This magnetic shield loam cake 4 and magnetic shield lower cover 5 are provided with

corresponding trip

42,52 in conjunction with ora terminalis, and it helps combining closely of magnetic shield loam cake 4 and magnetic shield lower cover 5, and magnetic core 2 is main induced field source.

Referring to Fig. 3 and shown in Figure 4, current-carrying coil 1, the 1A of appearance insulation more than a piece or a piece is inserted in the above-mentioned ring-like

hollow space

43,53 that places 2 of magnetic shield loam cake 4 and magnetic shield lower cover 5 and magnetic cores, this current-carrying coil 1 is according to design parameter, as internal coil diameter, the coil number of plies, wire circle, carrying out the single or multiple lift coil twines, its function is passed through for electric current is provided, and produces externally-applied magnetic field.

Magnetic colloid 6 is placed in the ring-like

hollow space

42,53 in the space with 1 of current-carrying coil (and 0.5～3 hour make magnetic colloid curing through 60 ℃～150 ℃ bakings of heating), its function is the space of filling up between current-carrying coil 1 and enclosing cover, but its fixed coil, reduces the magnetic noise and magnetic-path is provided.

This magnetic colloid 6 is to use heat-resistant adhesive kind and mictomagnetism powder to make, its heat-resistant adhesive kind comprise epoxy resin, silica gel or other can be heat-resisting 100 ℃ with the gluing kind, and the mictomagnetism powder comprises Hogonas SC200, SC100.26 Beipiao City and contains iron powder such as grand BF200.27, BF100.27 or alloy iron powder (Fe, Al, Si, Cr, Ni, Co) or other and have similar magnetic conductivity mixed-powder (as Sendust, Amorphous, MPP, Hi-Flux) mixture.

Insulator foot 7 is fixed in magnetic shield lower cover 5 outer ends, and in magnetic shield lower cover 5 nearly current-carrying coils 1 place one end pass the ora terminalis of magnetic shield lower cover 5 and the perforation of the symmetry on the insulator foot 7 54,72 with the conducting end 8 of symmetry and and stretch out fixingly, insulator foot 7 mainly provides element insulating and fixing conducting end 8.

With the magnetic shield lower cover 5 that includes the magnetic shield loam cake 4 of current-carrying coil 1, magnetic core 2 and magnetic colloid 6 and include current-carrying coil 1, magnetic core 2, magnetic colloid 6, insulator foot 7 and conducting end 8 with hot pressing mode in conjunction with finishing hot pressing composite type magnetic inductance element of the present utility model.

As Fig. 2 and shown in Figure 4, after current-carrying coil 1 feeds electric current, produce an externally-applied magnetic field according to the Ampere's law electric current, this adds magnetic field and will induce magnetic core 2 to produce an induced field, whole element is coated by the magnetic shield material of magnetic shield loam cake 4 and magnetic shield lower cover 5, (among the figure shown in the thick dashed line) will form closed magnetic path footpath via magnetic core 2 and magnetic shield material so magnetic line of force M, and this kind design has the following advantages at element characteristic:

A. significantly reduce gap energy loss (Gap Loss) problem:

By by the hot pressing mode encapsulation technology, magnetic core and occupy and there is no air gap (Air Gap) between the magnetic shielding material is so when the magnetic line of force passes magnetic core and occupies the magnetic shielding material interface, can significantly reduce gap energy loss (Gap Loss).

B. significantly reduce magnetic line of force loss problem:

Because whole element is coated by the magnetic shield material,, can significantly reduce magnetic line of force loss and go out element problem so the magnetic line of force forms the closed magnetic path footpath via magnetic core and magnetic shield material.

C. lift elements sense value and reduce the magnetic noise:

The space of coil and enclosing cover has been full of by magnetic colloid and is fixing, and can avoid the magnetic noise that is caused because of the coil vibration and extra magnetic-path is provided, lift elements sense value, according to the experiment gained, it can obtain about 5～20% sense values and strengthen.

Shown in Fig. 8 a, Fig. 8 b, Fig. 8 c, Fig. 8 d, above-mentioned hot pressing is in the combination of magnetic shield loam cake 4, magnetic shield lower cover 5 with magnetic core 2, can be the section that do not leak outside and coats magnetic core entirely, protrudes surperficial ring-type and coat magnetic core or protrusion/do not protrude the surface and can increase surface area contacted T type magnetic core.

Shown in Fig. 9 a, Fig. 9 b, Fig. 9 c, Fig. 9 d, above-mentioned magnetic shield loam cake 4, magnetic shield lower cover 5 can be symmetry with magnetic core 2 height ratio or the dissymmetrical structure mode is implemented.

Shown in Figure 10 a, Figure 10 b, Figure 10 c, Figure 10 d, magnetic core 2 materials in above-mentioned circular magnetic shield loam cake 4, the magnetic shield lower cover 5 can be concentric circles, are geometric shapes such as square type or polygonal; Or magnetic shield loam cake 4, the lower cover 5 of geometric shape magnetic core 2 outsides such as round, rectangle or polygonal can be geometries such as square type or multiangular.

Form the utility model hot pressing composite type magnetic inductance element according to said structure, make the magnetic core and the encapsulating material of magnetic inductance element not have gap (Air Gap), avoid gap energy loss (Gap Loss), reduction equipment/mould consume according to this and can promote magnetic circuit and sense value.

Above-mentioned explanation only is embodiment of the present utility model, and is non-for limiting embodiment of the present utility model; All personages who is familiar with this skill, it complies with feature category of the present utility model, and other equivalence of having done changes or modifies, and selects or change of shape etc. as size, material, all should be encompassed in following the utility model institute claim.

Claims

1. hot pressing composite type magnetic inductance element, it is characterized in that its structure is that the magnetic shield lower cover (5) that will include the magnetic shield loam cake (4) of current-carrying coil (1), magnetic core (2), magnetic colloid (6) and include current-carrying coil (1), magnetic core (2), magnetic colloid (6), insulator foot (7), conducting end (8) is with the hot pressing mode combination.

2. hot pressing composite type magnetic inductance element as claimed in claim 1, it is characterized in that, magnetic core (2) is packaged in respectively in second tank (51) of first tank (41) of magnetic shield loam cake (4) and magnetic shield lower cover (5), and magnetic core (2) magnetic shield loam cake (4) and magnetic shield lower cover (5) and magnetic core (2) be combined as a whole, it is in conjunction with forming one first ring-like hollow space (43), one second ring-like hollow space (53) in back first tank (41), second tank (51).

3. hot pressing composite type magnetic inductance element as claimed in claim 2, it is characterized in that, be inserted in first current-carrying coil (1), second current-carrying coil (1A) of appearance insulation more than a piece or a piece in the first ring-like hollow space (43), the second ring-like hollow space (53), described first current-carrying coil (1) can be according to parameter, be internal coil diameter, the coil number of plies, wire circle, carry out the single or multiple lift coil and twine.

4. hot pressing composite type magnetic inductance element as claimed in claim 1, it is characterized in that, magnetic colloid (6) be placed in the first ring-like hollow space (43), the second ring-like hollow space (53) with first current-carrying coil (1) between the space in, and made magnetic colloid curing in 0.5～3 hour through 60 ℃～150 ℃ bakings of heating.

5. hot pressing composite type magnetic inductance element as claimed in claim 1, it is characterized in that, magnetic shield loam cake (4) and magnetic shield lower cover (5) are provided with corresponding first trip (42), second trip (52) in conjunction with ora terminalis, and it helps magnetic shield loam cake (4) and magnetic shield lower cover (5) hot pressing to combine closely.

6. hot pressing composite type magnetic inductance element as claimed in claim 1 is characterized in that insulator foot (7) is fixed in magnetic shield lower cover (5) outer rim, and it is made of tool insulating properties material, and this tool insulating properties material is bakelite or anti-dragon.

7. hot pressing composite type magnetic inductance element as claimed in claim 1, it is characterized in that, magnetic shield lower cover (5) and insulator foot (7) ora terminalis or plane are provided with the first corresponding perforation (54), second perforation (72), can run through for corresponding conducting end (8), and nearly first current-carrying coil of a termination that makes conducting end (8) (1), and end stretches out in addition.

8. hot pressing composite type magnetic inductance element as claimed in claim 1, it is characterized in that, the hot pressing combination of magnetic shield loam cake (4), magnetic shield lower cover (5) and magnetic core (2) is for the section that do not leak outside coats magnetic core entirely, protrudes surperficial ring-type and coat magnetic core or protrusion/the do not protrude T type magnetic core that surface energy increases contact area.

9. hot pressing composite type magnetic inductance element as claimed in claim 1 is characterized in that, magnetic shield loam cake (4), magnetic shield lower cover (5) make up with the hot pressing of magnetic core (2), and its height ratio is that symmetry or dissymmetrical structure mode are implemented.

10. hot pressing composite type magnetic inductance element as claimed in claim 1 is characterized in that, magnetic core (2) material in magnetic shield loam cake (4), the lower cover (5) is concentric circles, is square type or polygonal; Or round, rectangle or outside magnetic shield loam cake (4), the lower cover (5) of polygonal magnetic core (2) are square type or multiangular.