CN202855475U - Inductance element and inductance element assembly - Google Patents

Inductance element and inductance element assembly Download PDF

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Publication number
CN202855475U
CN202855475U CN 201220515889 CN201220515889U CN202855475U CN 202855475 U CN202855475 U CN 202855475U CN 201220515889 CN201220515889 CN 201220515889 CN 201220515889 U CN201220515889 U CN 201220515889U CN 202855475 U CN202855475 U CN 202855475U
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Prior art keywords
magnetic core
inductance element
hole
inductance
wire
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CN 201220515889
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Chinese (zh)
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潘德政
刘长征
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Shenzhen Sunlord Electronics Co Ltd
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Shenzhen Sunlord Electronics Co Ltd
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Priority to CN 201220515889 priority Critical patent/CN202855475U/en
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Abstract

The utility model discloses an inductance element which comprises a magnetic core. An air gap is arranged on the lateral face of the magnetic chip, a groove is formed at the upper end of the magnetic chip, a through hole which penetrates through the inside of the magnetic core to reach the lower end of the magnetic core is formed in the groove, and a wire is arranged in the through hole and forms an electrode. The utility model further discloses an inductance assembly which is integrally formed by a plurality of inductance elements. The inductance element and the inductance assembly have the advantages of being large in inductance value and current, small in resistance, good in impact resistance, low in price and the like.

Description

A kind of inductance element and inductance element group
Technical field
The utility model relates to electronic devices and components, relates in particular a kind of inductance element.
Background technology
Along with the development of electronic technology, the operating current of the IC that uses on the electronic equipment is increasing, and especially the VRM/VRD voltage to the CPU power supply only has several volts, and electric current is up to tens peaces.This just requires the operating current of the inductance element of periphery also to increase thereupon, and the resistance value of inductance also require more and more less, the heat that produces to reduce electric current, thus improve circuit efficiency.For the miniaturization of device, the operating frequency of inductance has also improved simultaneously.
The typical inductance value of ferrite inductance of straight wire is generally at 100-400nH, inductance value is large again, mean that the air gap between the magnetic core can be very little, the air gap or the size of the bonding air gap that obtains of two halves magnetic core that are cutting all are difficult to accurately control, inductance value can produce very large variation along with the minimum change of air gap, cause unstable in the production, the qualification rate of product reduces.
For integrated inductance, because the air gap between the magnetic is more, the inductance value of straight wire integrated inductance is generally very little, in the situation that overall dimension is the same, accomplish and the identical inductance value of ferrite inductance of straight wire, integrated inductance often needs a few circle coils.The resistance of integrated inductance is several times of ferrite inductance often.When electric current is very large, on the inductance voltage drop very large, produce very large loss.
Summary of the invention
Main purpose of the present utility model is exactly for the deficiencies in the prior art, provides that a kind of inductance value is large, saturation characteristic is good, the large-current electric sensing unit of low-resistance value.
For achieving the above object, the utility model is by the following technical solutions:
A kind of inductance element comprises magnetic core, it is characterized in that, described magnetic core side has air gap, and the upper end of described magnetic core is provided with groove, is provided with the through hole that leads to the lower end of described magnetic core through magnetic core inside in the described groove, and lead placement is in described through hole and form electrode.
According to embodiment, preferably:
Magnetic glue is coated in the described groove, covers described wire.
Described through hole is communicated with described air gap.
Described through hole is flat square opening, the vertical center that connects described through hole of described air gap.
Described magnetic core is square, and described air gap and described through hole all have a pair of and be arranged in the opposite flank of described magnetic core, and described wire inserts in a pair of described through hole, and terminal lower end from described magnetic core extends out as electrode.
Described wire is the square shape of lower ending opening.
Described wire is one.
Described wire shape is flat wire or round conductor.
The end that extends out from described magnetic core lower end of described wire pastes inwardly states the magnetic core surface or outward or protrude from described magnetic core surface.
A kind of inductance element group comprises a plurality of described inductance element that forms as one.
The beneficial effects of the utility model:
The upper end of the utility model magnetic core is provided with groove, is provided with the through hole that leads to the lower end of described magnetic core through magnetic core inside in the described groove, and wire passes the through hole in the groove, can form a heavy-current inductor.Several inductance are formed together and can be used as inductive bank.With respect to the inductance that ferrite inductance and the top of straight wire has wire to expose, inductance element of the present utility model can increase inductance value, reduces loose magnetic flux, improves the reliability of product, reduces simultaneously installing space and expense.Inductance of the present utility model has the advantages such as electric property is stable, reliability is high, is easy to produce in batches, saves space and mounting cost, and the while cost is relatively low.
Further, by coating magnetic glue in groove, but fixing cord reduces leakage field simultaneously, has reduced the interference of external circuit, forms simultaneously a heavy-current inductor that inductance value is larger.
Description of drawings
Fig. 1 is the core structure schematic diagram of an embodiment of the utility model;
Fig. 2 is the assembling schematic diagram of the Flat wire high-current inductor of an embodiment of the utility model;
Fig. 3 a-3c is the schematic diagram of the Flat wire high-current inductor of an embodiment of the utility model;
Fig. 4 is the schematic diagram of the round conductor heavy-current inductor of an embodiment of the utility model
Fig. 5 a-5b is the schematic diagram of the heavy-current inductor group of an embodiment of the utility model
Embodiment
By reference to the accompanying drawings the utility model is further described in detail by the following examples.
Fig. 1 is a kind of core structure diagram of the present utility model, and the material of magnetic core can be ferrite, for example is MnZn or nickel Zinc material.Magnetic core 10 can be the similar cuboid of profile, and an end of magnetic core is fluted 11, and there are two through hole A of threading the inside, and the side is two air gaps 12.
Preferably, described through hole A is communicated with described air gap 12.
Preferably, described through hole A is flat square opening, the described air gap 12 vertical centers that connect described through hole.
Shown in Figure 2 is the assembling schematic diagram of the large inductance of flat wire of an embodiment of the utility model, flat conductor 40 passes from the through hole A of groove 11, and bending simultaneously can form the electrode that mounts in addition, magnetic glue 50 can be filled in groove 11 the insides, but its fixing cord and magnetic core.
Fig. 3 a is the profile schematic diagram of flat conductor heavy-current inductor, and the electrode of inductance bottom surface can have two kinds of designs.A kind of bottom view of inductance shown in Fig. 3 b, the tail end of flat conductor 40 bend inwards and form electrode 41.Fig. 3 c is the bottom view of another inductance, and the tail end outward of flat conductor 40 forms electrode 42.
Fig. 4 is the schematic diagram that adopts an embodiment of round conductor, except round conductor pass through hole after end no longer bend, form outside two PIN angles 51 of plug-in unit inductance, the heavy-current inductor of other structure and flat wire is substantially the same, such heavy-current inductor both can have been made surface encapsulation, also can make plug-in unit, can satisfy the requirement of different pads.
The magnetic glue of inductance top groove can be magnetic, glue and a small amount of mixture of other liquid.Magnetic can be ferrite powder, iron powder, iron silicon, iron nickel, iron sial, iron nickel molybdenum etc., and they are in the overwhelming majority that usually accounts for qualitatively magnetic core.Glue can be epoxy glue, silica gel water etc., can also comprise a small amount of other liquid such as terpinol etc.The preferred electronickelling in the surface of flat conductor or circle line and tin are to improve non-oxidizability and weldability.
It is the schematic diagram of the heavy-current inductor group that comprises that a plurality of described inductance are integrally formed shown in Fig. 5 a, the 5b.The magnetic core profile can be a similar cuboid, and there are several grooves on the top, and magnetic glue is filled in the inside.Fig. 5 a is the large set of currents of flat wire, it can think that the one by one junior unit cut apart by dotted line among the figure forms (these dotted lines are non-existent at the product of reality), and these junior units are exactly the inside or bandy inductance of wire end among Fig. 3 b, the 3c of front.The number of these junior units can be the arbitrary integer greater than 2.They are magnetic cores of an integral body, are not bonding by glue.Shown in Fig. 5 b is circle line heavy-current inductor group.The heavy-current inductor group can satisfy multiplex output circuit to the requirement of inductance, and has reduced installation dimension and expense.
Above content is in conjunction with concrete preferred implementation further detailed description of the utility model, and the implementation that can not recognize utility model is confined to these explanations.For the utility model person of an ordinary skill in the technical field, without departing from the concept of the premise utility, can also make some simple deduction or replace, all should be considered as belonging to protection range of the present utility model.

Claims (10)

1. an inductance element comprises magnetic core, it is characterized in that, described magnetic core side has air gap, the upper end of described magnetic core is provided with groove, is provided with the through hole that leads to the lower end of described magnetic core through magnetic core inside in the described groove, and lead placement is in described through hole and form electrode.
2. inductance element as claimed in claim 1 is characterized in that, magnetic glue is coated in the described groove, covers described wire.
3. inductance element as claimed in claim 1 is characterized in that, described through hole is communicated with described air gap.
4. inductance element as claimed in claim 1 is characterized in that, described through hole is flat square opening, the vertical center that connects described through hole of described air gap.
As claim 1 to 4 each to described inductance element, it is characterized in that, described magnetic core is square, described air gap and described through hole all have a pair of and are arranged in the opposite flank of described magnetic core, described wire inserts in a pair of described through hole, and terminal lower end from described magnetic core extends out as electrode.
6. inductance element as claimed in claim 5 is characterized in that, described wire is the square shape of lower ending opening.
7. wire as claimed in claim 5 is characterized in that, described wire is one.
As claim 1 to 4 each to described inductance element, it is characterized in that, described wire shape is flat wire or round conductor.
As claim 1 to 4 each to described inductance element, it is characterized in that, the end that extends out from described magnetic core lower end of described wire pastes inwardly states the magnetic core surface or outward or protrude from described magnetic core surface.
10. an inductance element group is characterized in that, comprises form as one a plurality of such as each described inductance element of claim 1-9.
CN 201220515889 2012-10-10 2012-10-10 Inductance element and inductance element assembly Active CN202855475U (en)

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Publications (1)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105529128A (en) * 2016-02-03 2016-04-27 深圳顺络电子股份有限公司 Inductor and manufacturing method therefor
CN105679492A (en) * 2016-04-15 2016-06-15 深圳顺络电子股份有限公司 Electric inductor and manufacturing method thereof
CN111415797A (en) * 2020-04-29 2020-07-14 重庆美桀电子科技有限公司 Inductance assembly, method for manufacturing inductance assembly and automation equipment

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105529128A (en) * 2016-02-03 2016-04-27 深圳顺络电子股份有限公司 Inductor and manufacturing method therefor
CN105529128B (en) * 2016-02-03 2018-06-29 深圳顺络电子股份有限公司 A kind of inductance and its manufacturing method
CN105679492A (en) * 2016-04-15 2016-06-15 深圳顺络电子股份有限公司 Electric inductor and manufacturing method thereof
CN111415797A (en) * 2020-04-29 2020-07-14 重庆美桀电子科技有限公司 Inductance assembly, method for manufacturing inductance assembly and automation equipment

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