CN201707999U

CN201707999U - Induction element

Info

Publication number: CN201707999U
Application number: CN2010201066605U
Authority: CN
Inventors: 杨宗霖; 梁文有
Original assignee: QILIXIN ELECTRONICS CO Ltd
Current assignee: QILIXIN ELECTRONICS CO Ltd
Priority date: 2010-02-03
Filing date: 2010-02-03
Publication date: 2011-01-12
Anticipated expiration: 2020-02-03

Abstract

The utility model relates to an induction element, comprising a magnetic core, a coil and magnetic material, wherein the magnetic core is provided with at least one containing space; the coil is surrounded around the magnetic core; and the magnetic material is coated on the coil and filled into the containing space of the magnetic core. The utility model has the advantages of low resistance, high efficiency, high current resistance, and the like.

Description

Inductance element

Technical field

The utility model relates to a kind of inductance element, particularly about having the inductance element in space in a kind of magnetic core array.

Background technology

Casting mold inductance element (molding inductor) has the little characteristics of volume, is fit to the electronic installation of the electronic component of needs small size.The making of casting mold inductance element is that coil is positioned in the die cavity, then this die cavity is inserted Magnaglo, and compacting at last forms.Generally speaking, Magnaglo can comprise iron powder, filler (filler), resin (resin) and lubricant (lubricant) etc.Except that volume is little, the casting mold inductance element have in addition can anti-big electric current advantage.

The casting mold inductance element that does not comprise iron core has lower permeability (permeability), therefore if will keep suitable inductance value, then need more coil number, and more coil number can cause higher resistance value.Though the casting mold inductance element of this type has can anti-big electric current, design safety factor (DSF) is high and circuit protection can effectively be provided, and cause that permeability lower higher because of resistance value, and make it have the shortcoming that power consumption and efficient are not cited.

In addition, coil is wound in iron core and the inductance made, can has the cause of higher permeability, and can reduce resistance and raise the efficiency because of iron core.Yet this type of inductance is because of the saturated restriction that is magnetic, and the impact that can't bear big electric current.Even, can bear under the situation of big electric current, because of losing its due function, and cause the damage of other electronics zero element on the circuit.

In sum, traditional casting mold inductance element has the little advantage of volume, but cause higher because of its resistance value and that permeability is lower has the unclear shortcoming of power consumption and efficient again.Moreover, though having the inductance of iron core, tradition has low resistance and high efficiency advantage, the impact that can't bear big electric current.

The utility model content

In view of foregoing problems, a purpose of the present utility model provides a kind of new inductance element, and this inductance element comprises the magnetic core portion of the material with different magnetic capacity, therefore have low resistance, high efficiency and can anti-high electric current etc. advantage.

According to aforementioned purpose, the utility model one is implemented example and is disclosed a kind of inductance element, and this inductance element comprises a magnetic core array, a coil and a molding magnetic material.Magnetic core array has at least one accommodation space, and coil is around this magnetic core array, and the molding magnetic material coats this coil and is filled in the accommodation space of magnetic core array.

Than prior art, the useful technique effect of inductance element of the present utility model be have low resistance, high efficiency and can anti-high electric current etc. advantage.

Description of drawings

Fig. 1 shows the schematic perspective view of the inductance element of an embodiment of the present utility model;

Fig. 2 shows another schematic perspective view of the inductance element of an embodiment of the present utility model;

Fig. 3 shows the magnetic core array of an embodiment of the present utility model and the schematic diagram of coil;

Fig. 4 A to Fig. 4 D shows the schematic diagram of the accommodation space of different embodiment of the present utility model; And

Fig. 5 A to 5D shows the schematic diagram of the lateral cross section profile of the lateral cross section profile of magnetic core array of different embodiment of the present utility model and accommodation space; And

Fig. 6 A to Fig. 6 B shows the schematic diagram of the magnetic core array with a plurality of accommodation spaces of different embodiment of the present utility model.

Wherein, description of reference numerals is as follows:

1 inductance element

11 magnetic core arrays

11a to 11h magnetic core array

12 coils

13 magnetic materials

111 accommodation spaces

111a to 111h accommodation space

112,113 openings

114 end faces

121 end pin

131 bottom surfaces

132 bed hedgehopping portions

Embodiment

Fig. 1 shows the schematic perspective view of the inductance element 1 of an embodiment of the present utility model.Inductance element 1 comprises a magnetic core array 11, a coil 12 and a magnetic material 13.Magnetic core array 11 has an accommodation space 111.Coil 12 by construction with around magnetic core array 11.Magnetic material 13 by construction to coat this coil 12 and to be filled in the accommodation space 111 of magnetic core array 11.Inductance element 1 of the present utility model can be casting mold inductance element (molding inductor), but is not limited thereto.In addition, inductance element 1 of the present utility model is not limited to plug-in type inductance element (DIP type inductor), and it also can be the inductance element (SMD type inductor) of surface stuck.

With reference to Fig. 1 and shown in Figure 2, magnetic core array 11 is to make with high magnetic conductive material, so but the magnetic line of force that concentrating coil 12 produces, thus the inductance value of raising inductance element 1.Because inductance value improves, therefore can reduce the pitch of the laps number of coil 12, the line footpath that coil 12 is used in increase, and allow the resistance of inductance element 1 reduce, promote the efficient of inductance element 1.For example, magnetic core array 11 can Ferrite (Ferrite (s)), Ni Zn ferrimagnet magnet, molybdenum beryllium material such as alloyed powder iron core, manganese-zinc ferrite magnet or ambrose alloy zinc-iron oxygen magnet not.In addition, the inside of magnetic core array 11 forms an accommodation space 111, to fill magnetic material 13.

Coil 12 spirals are wound in magnetic core array 11, and form two ends pin 121.The material of coil 12 can be copper, aluminium or other metal or alloy that is suitable for.Coil 12 outer surfaces can comprise an adhesion material, wherein apply solvent (for example alcohol or acetone) or execute to calorify this adhesion material, can make coil 12 inner rings around lead bind mutually.

Magnetic material 13 can be molding magnetic material (magnetic molding materials), and it, and is filled in the accommodation space 111 of magnetic core array 11 coating magnetic core array 11 and coil 12 by construction.In the present embodiment, inductance element 1 can be the casting mold inductance element, and it can utilize compression moulding or molded method, and magnetic material 13 is formed the cladding that coats magnetic core array 11 and coil 12.The step that forms the inductance element 1 of present embodiment can be: at first, magnetic core array 11 and coil 12 are placed in the die cavity, wherein these coil 12 circles are around this magnetic core array 11; Then, the magnetic material 13 that will be powdery is inserted die cavity, and when wherein inserting magnetic material 13, magnetic material 13 can be received in the accommodation space 111 of magnetic core array 11 in the lump; Then, the moulding (pressure molding) of exerting pressure; At last, the resin in the heat hardening magnetic material 13.Magnetic material 13 can comprise a Magnaglo or multiple Magnaglo and resin (resin) with different permeabilities, and wherein the material of Magnaglo can comprise arbitrary combination of any or previous materials in iron, silicon, cobalt, chromium, copper, molybdenum, niobium, nickel, aluminium, platinum and the oxide thereof.

With reference to shown in Figure 2, after magnetic material 13 moulding of coating magnetic core array 11 and coil 12, the two ends pin 121 of coil 12 protrudes out from the bottom surface 131 of magnetic material 13.The magnetic material 13 that coats magnetic core array 11 and coil 12 can have the cuboid external form, but the utility model is not as limit.The bottom surface 131 that coats the magnetic material 13 of magnetic core array 11 and coil 12 can be provided with bed hedgehopping portion 132 in addition, and wherein this bed hedgehopping portion 132 of inductance element 1 mat is placed on the circuit board.

With reference to shown in Figure 3, in this case embodiment, magnetic core array 11 can be column, and it is thought that by construction coil 12 surrounds.In other words, the volume of magnetic core array 11 is rough equal coil 12 inner rings around volume, so inductance element 1 can have preferable usefulness performance.But, in other embodiments, the volume of magnetic core array 11 also can be slightly little or be a bit larger tham coil 12 inner rings around volume, and still can reach the required usefulness of the disclosed inductance element of the utility model 1.

In detail, in this case embodiment, magnetic core array 11 can have cylindrical shape, and the length L core of magnetic core array 11 can approximate the length L coil of coil 12, and the outer diameter D core of magnetic core array 11 can approximate the inside diameter D coil of coil 12.In addition, have accommodation space 111 in the magnetic core array 11, this accommodation space 111 accounts for the volume ratio of magnetic core array 11 can be between 10% to 70%.Preferably, this accommodation space 111 account for the volume ratio of magnetic core array 11 can be between 20% to 40%.

On the direction transverse to coil 12 rolls 2, the lateral cross section shape of accommodation space 111 can be simple closed curve (simple closed curve), the i.e. curve of not selfing.In the present embodiment, the cross sectional shape of accommodation space 111 is circular.In addition, accommodation space 111 can be the through hole that runs through magnetic core array 11 both ends of the surface, but and the perforate of magnetic material 13 self-alignments on both ends of the surface of powdery inserted in the accommodation space 111.

With reference to Fig. 3,4A and 4B, accommodation space 111 with ccontaining magnetic material 13, and is made coil 12 can center on two kinds of different magnetic conductive materials by construction, and accommodation space 111 shapes can be unrestricted.Accommodation space 111 can run through and is formed at magnetic core array 11, and as shown in Figure 3, has consistent internal diameter on the direction that runs through.In addition, in the embodiment of Fig. 4 A, along the roll of coil 12 upwards, in the longitudinal cross-section of magnetic core array 11a, accommodation space 111a can have trapezoidal shape.In addition, in the embodiment of Fig. 4 B, on the longitudinal cross-section of magnetic core array 11b, it is inner toward the gradually big shape in both sides from magnetic core array 11b that accommodation space 111b can be.

With reference to Fig. 4 C and 4D, in the embodiment that Fig. 4 C shows, accommodation space 111c can run through magnetic core array 11c, yet it forms the opening 112 and 113 of different sizes respectively on the both ends of the surface 114 of magnetic core array 11c.In addition, in the embodiment that Fig. 4 D shows, magnetic core array 11d comprises two opposing end faces 114, and accommodation space 111d can be the formed groove that does not run through on a magnetic core array 11d end face 114 wherein.

With reference to Fig. 5 A to Fig. 5 D, the roll 2 of coil 12 transversely, magnetic core array 11 can have different lateral cross section shapes respectively with accommodation space 111.In the embodiment that Fig. 5 A shows, magnetic core array 11e can have circular lateral cross section profile, and the lateral cross section profile of accommodation space 111e can be ellipse; In the embodiment that Fig. 5 B shows, magnetic core array 11f can have circular lateral cross section profile, and accommodation space 111f can have polygonal profile; In the embodiment that Fig. 5 C shows, the profile of magnetic core array 11g can be ellipse, and the profile of accommodation space 111g can be part to projecting inward polygon-shaped; In the embodiment that Fig. 5 D shows, the lateral cross section profile of magnetic core array 11h can be polygon, and the profile of accommodation space 111h can be ellipse.

With reference to Fig. 3,6A and 6B, accommodation space 111 with can ccontaining magnetic material 13, and be made coil 12 can center on two kinds of different magnetic conductive materials by construction.Accommodation space 111 can run through and is formed at magnetic core array 11, as shown in Figure 3.In addition, magnetic core array 11 can comprise a plurality of accommodation spaces 111.For example, in the embodiment of Fig. 6 A, magnetic core array 11i can have two and run through accommodation space 111i.In addition, in the embodiment of Fig. 6 B, magnetic core array 11j can have four and run through accommodation space 111j, but the number of accommodation space of the present utility model does not exceed with previous embodiment.

In sum, the disclosed inductance element of the utility model comprises magnetic core array, a coil and the magnetic material with an accommodation space.Coil is wound in magnetic core array, and magnetic material coats coil and magnetic core array, and inserts this accommodation space, makes the coil two kinds of materials with different magnetic capacity of reeling, and allows this inductance element have low resistance, high efficiency and advantage that can anti-high electric current etc.

Technology contents of the present utility model and technical characterstic disclose as above, yet those skilled in the art still may be based on teaching of the present utility model and disclosed contents and done all replacement and modifications that does not deviate from the utility model spirit.Therefore, protection range of the present utility model should be not limited to the disclosed content of embodiment, and should comprise various do not deviate from replacement of the present utility model and modifications, and is contained by the scope of following claim.

Claims

1. inductance element is characterized in that comprising:

One magnetic core array, this magnetic core array has at least one accommodation space;

One coil, this coil are complied with a roll of this magnetic core array around this magnetic core array; And

One molding magnetic material, this molding magnetic material coat this coil and are filled in this at least one accommodation space of this magnetic core array.

2. inductance element as claimed in claim 1 is characterized in that in this magnetic core array, and the shared volume ratio of this at least one accommodation space is between 10% to 70%.

3. inductance element as claimed in claim 2 is characterized in that in this magnetic core array, and the shared volume ratio of this at least one accommodation space is between 20% to percent 40%.

4. inductance element as claimed in claim 3 is characterized in that the lateral cross section of this at least one accommodation space is shaped as the closed curve of not selfing.

5. inductance element as claimed in claim 4 is characterized in that the closed curve of this not selfing is circle, ellipse or polygon.

6. inductance element according to claim 4 is characterized in that this at least one accommodation space is a through hole.

7. inductance element according to claim 6 is characterized in that this through hole has two openings that vary in size.

8. inductance element according to claim 4, it is a plurality of along the upwardly extending accommodation space of this roll to it is characterized in that this at least one accommodation space comprises.

9. inductance element according to claim 1 is characterized in that the profile of the lateral cross section of this magnetic core array is circle, ellipse or polygon.