CN219105892U

CN219105892U - UI type vertical winding inductor

Info

Publication number: CN219105892U
Application number: CN202223273892.1U
Authority: CN
Inventors: 胡军; 朱爱洲; 汪伟; 王立印; 张�杰
Original assignee: Yangzhou Huadan Power Electronic Technology Co ltd
Current assignee: Yangzhou Huadan Power Electronic Technology Co ltd
Priority date: 2022-12-07
Filing date: 2022-12-07
Publication date: 2023-05-30
Anticipated expiration: 2032-12-07

Abstract

The utility model discloses a UI type vertical winding inductor which comprises a U-shaped magnetic core and an I-shaped strip block magnetic core arranged at the opening end of the U-shaped magnetic core, wherein a plurality of vertical winding coils are sleeved on the U-shaped magnetic core, and the cross section width a and the depth b of the U-shaped magnetic core and the cross section width c and the depth d of the I-shaped strip block magnetic core simultaneously meet the requirement that d is more than or equal to b, (c multiplied by d)/(a multiplied by b) =0.8-1.3. According to the UI type vertical winding inductor, the number of turns of the vertical winding coil can be increased through the U-shaped magnetic core structure, so that the inductance of the inductor can be increased, and meanwhile, the assembly difficulty can be reduced; and the magnetic leakage can be reduced by adjusting the size of the magnetic core of the I-shaped strip block.

Description

UI type vertical winding inductor

Technical Field

The utility model relates to a UI type vertical winding inductor, and belongs to the technical field of inductors.

Background

The inductor is an important device in the field of power electronics, and the annular vertical winding inductor is widely adopted due to the advantages of good heat dissipation effect, small parasitic capacitance of an inductance coil, good electromagnetic compatibility effect in circuit application and the like. In the prior art, an annular vertical winding inductor (as shown in fig. 4) is formed by assembling a cut annular magnetic core and a vertical winding square flat coil, the annular magnetic core is generally symmetrically cut through tools such as a high-speed grinding wheel, the magnetic core is then arranged in the flat vertical winding coil, and finally, bonding glue is coated on the cutting surface of the magnetic core to bond a magnetic ring, so that the inductor is formed.

However, in the inductor assembled by such a structure, since the standing coils are bent into a single layer arrangement in the shape of a circular magnetic core, the number of the standing coils to be wound is limited, which is disadvantageous in that the inductance of the inductor is increased. The magnetic core is difficult to assemble in the flat vertical winding coil, and is easy to misplace.

Disclosure of Invention

In order to solve the defects in the prior art, the utility model provides the UI type vertical winding inductor which is convenient to install, and the U-shaped magnetic core structure can increase the number of turns of the vertical winding coil, so that the inductance of the inductor can be increased, and meanwhile, the assembly difficulty can be reduced; and the magnetic leakage can be reduced by adjusting the size of the magnetic core of the I-shaped strip block.

The technical scheme adopted by the utility model is as follows:

a UI type vertical winding inductor comprises a U-shaped magnetic core and an I-shaped strip block magnetic core arranged at the opening end of the U-shaped magnetic core, wherein a plurality of vertical winding coils are sleeved on the U-shaped magnetic core, the cross section width a and the depth b of the U-shaped magnetic core and the cross section width c and the depth d of the I-shaped strip block magnetic core simultaneously meet d not less than b, and (c multiplied by d)/(a multiplied by b) =0.8-1.3.

In one preferred aspect of the present utility model, an adhesive is coated on the bonding surface of the U-shaped magnetic core and the I-shaped bar magnetic core.

Preferably, the cross-sectional width a and the depth b of the U-shaped magnetic core and the cross-sectional width c and the depth d of the I-shaped bar magnetic core simultaneously satisfy d.gtoreq.b, and (c×d)/(a×b) =0.9-1.1.

In one preferred embodiment of the present utility model, the vertical winding coils sleeved on the annular structure of the U-shaped magnetic core are uniformly distributed, and the vertical winding coils sleeved on the strip-shaped structure of the U-shaped magnetic core are also uniformly distributed.

In one preferred embodiment of the present utility model, the density of the standing coils fitted over the annular structure of the U-shaped magnetic core is smaller than the density of the standing coils fitted over the strip-shaped structure of the U-shaped magnetic core.

In order to fully exert the advantage of good heat dissipation effect of the vertical winding inductor, the mounting plate is ensured to be firm, and the metal bottom plate is usually selected for vertical mounting, but the winding coil of the annular vertical winding inductor completely wraps the magnetic core and is not easy to vertically fix on the metal bottom plate, and meanwhile, insulation is needed between the winding coil and the metal bottom plate, so that the process is complex.

Therefore, as one preferable mode of the utility model, a metal bottom plate is fixedly arranged at the lower part of the I-shaped strip block magnetic core, a sinking groove for embedding the lower part of the I-shaped strip block magnetic core is arranged on the metal bottom plate, and the I-shaped strip block magnetic core is embedded into the sinking groove on the metal bottom plate and is conveniently fixed by adhesive glue.

The utility model has the beneficial effects that:

1. the U-shaped magnetic core can increase the number of turns of the sleeved flat vertical coil, so that the inductance of the inductor and the utilization rate of the magnetic core performance can be greatly improved, and the difficulty of a coil assembly process is reduced;

2. the U-shaped magnetic core and the I-shaped strip block magnetic core form the UI-shaped vertical winding inductor, so that the installation is convenient, the U-shaped magnetic core and the I-shaped strip block magnetic core are particularly suitable for bonding the I-shaped strip block magnetic core and the bottom plate to form vertical installation, and the installation is simple and firm;

3. by adjusting the size of the magnetic core of the I-shaped strip block, magnetic leakage can be reduced, the use amount of the magnetic core of the I-shaped strip block is saved on the premise of avoiding magnetic saturation of the magnetic core of the I-shaped strip block, and meanwhile, the overall size of the inductor is optimized;

4. the I-shaped strip magnetic core is buried in a sinking groove on the metal bottom plate, so that the I-shaped strip magnetic core is conveniently fixed by adhesive; the magnetic core and the metal bottom plate are grounded, insulation is not needed between the magnetic core and the metal bottom plate, and the coil is not contacted with the bottom plate and is not needed to be insulated, so that the installation process is simplified; in addition, when the inductor works, the coil and the magnetic core generate heat, and the metal bottom plate is beneficial to heat dissipation of the magnetic core.

Drawings

FIG. 1 is a schematic diagram of the structure of the present utility model;

FIG. 2 is a top view of a magnetic core;

FIG. 3 is a side view of the core;

FIG. 4 is a schematic diagram of a prior art toroidal inductor;

the main reference numerals in the figures have the following meanings:

1. u-shaped magnetic core, 2, I shape strip piece magnetic core, 3, vertical coil, 4, metal bottom plate.

Detailed Description

The utility model is described in detail below with reference to the drawings and examples.

As shown in fig. 1-3: a UI type vertical winding inductor is formed by assembling a U-shaped magnetic core 1, an I-shaped bar block magnetic core 2 and a plurality of flat vertical winding coils 3, wherein the vertical winding coils 3 are sleeved on the U-shaped magnetic core 1 firstly, then adhesive glue is coated on the cross section of the U-shaped magnetic core 1, and the U-shaped magnetic core is symmetrically and centrally closed with the I-shaped bar block magnetic core 2; the lower part of the I-shaped strip magnetic core 2 is also provided with a metal bottom plate 4, a plurality of mounting holes and a sinking groove for embedding the lower part of the I-shaped strip magnetic core 2 are arranged on the bottom plate 4, and the lower part of the I-shaped strip magnetic core 2 is embedded into the sinking groove and is fixedly connected with the bottom plate 4 through adhesive to form the UI-type inductor.

The vertical winding coils 3 sleeved on the annular structure of the U-shaped magnetic core 1 are uniformly distributed, the vertical winding coils 3 sleeved on the strip-shaped structure of the U-shaped magnetic core 1 are also uniformly distributed, and the density of the vertical winding coils 3 sleeved on the annular structure of the U-shaped magnetic core 1 is smaller than that of the vertical winding coils 3 sleeved on the strip-shaped structure of the U-shaped magnetic core 1.

According to the UI-type vertical winding inductor, a magnetic core is not required to be cut, the number of turns of the flat vertical winding coil 3 which can be sleeved is greatly increased by the U-shaped magnetic core 1, the inductance of the inductor is greatly improved, and the utilization rate of the magnetic core performance is greatly improved; the U-shaped magnetic core 1 is sleeved with the flat vertical coil 3, so that the coil assembly process difficulty is greatly reduced. The U-shaped magnetic core 1 and the I-shaped strip magnetic core 2 form a UI-shaped vertical winding inductor, so that the installation is convenient, and the U-shaped magnetic core is particularly suitable for bonding the I-shaped strip magnetic core 2 and the metal bottom plate 4 to form vertical installation, and the installation is simple and firm.

The cross section width of the U-shaped magnetic core 1 is a, the depth is b, the cross section width of the I-shaped strip magnetic core 2 is c, the depth is d, and the following relation is satisfied for the dimensions: 1) d is more than or equal to b; 2) (c×d)/(a×b) =0.8 to 1.3, preferably 0.9 to 1.1; the magnetic leakage can be reduced by meeting the relation, the consumption of the I-shaped strip block magnetic core 2 is saved on the premise of avoiding the magnetic saturation of the I-shaped strip block magnetic core 2, and meanwhile, the overall size of the inductor is optimized.

Example 1

The U-shaped magnetic core is adopted, the cross section width a=16 mm, the depth b=30 mm, the height e=58 mm and the width f=58 mm are made of iron-silicon-aluminum, and the magnetic permeability is 60; the depth d=30 mm, the width c=16 mm and the length g=58 mm of the I-shaped magnetic core are made of iron-silicon-aluminum, and the magnetic permeability is 60. The vertical winding flat aluminum wire is used for 1.4 multiplied by 10mm, and the maximum winding circle number is 38Ts. The inductance at 0A is 280uH; the inductance at 55A was 100uH.

Example 2

The U-shaped magnetic core is adopted, the cross section width a=16 mm, the depth b=30 mm, the height e=58 mm and the width f=58 mm are made of iron-silicon-aluminum, and the magnetic permeability is 60; the depth d=40 mm, the width c=11 mm and the length g=58 mm of the I-shaped magnetic core are made of iron-silicon-aluminum, and the magnetic permeability is 60. The vertical winding flat aluminum wire is used for 1.4 multiplied by 10mm, and the maximum winding circle number is 38Ts. The inductance at 0A is 280uH; the inductance at 55A was 100uH.

Example 3

A U-shaped magnetic core is adopted, the cross section width a=16 mm, the depth b=30 mm, the height e=58 mm and the width f=58 mm are made of ferrosilicon, and the magnetic permeability is 60; the depth d=30 mm, the width c=16 mm and the length g=58 mm of the I-shaped magnetic core are made of iron silicon, and the magnetic permeability is 60. The vertical winding flat aluminum wire is used for 1.4 multiplied by 10mm, and the maximum winding circle number is 38Ts. The inductance at 0A is 280uH; the inductance at 55A was 160uH.

Comparative example 1

A magnetic ring with the outer diameter of 58mm, the inner diameter of 26mm and the thickness of 30mm and made of iron-silicon-aluminum and the magnetic conductivity of 60 is used for half-cutting; after cutting, a vertically wound flat aluminum wire of 1.4X10 mm was used, with a maximum number of turns of only 10Ts. The inductance at 0A is 25uH; the inductance at 55A was 20uH.

As can be seen from examples 1 to 3 and comparative example 1, the UI type standing wound inductor provided by the present utility model can increase the number of turns of the flatly sleeved standing wound coil and can greatly increase the inductance of the inductor. As is clear from examples 1 and 2, the inductance values of the two are not changed, but the size of the I-shaped bar core in example 2 is reduced, so that the cost can be reduced, and the leakage can be reduced by adjusting the size of the I-shaped bar core; as is clear from examples 1 and 3, the target inductor can be obtained by changing the material of the magnetic core.

The foregoing is merely illustrative of the preferred embodiments of this utility model, and it will be appreciated by those skilled in the art that variations and modifications may be made without departing from the principles of this utility model, and such variations and modifications are to be regarded as being within the scope of this utility model.

Claims

1. A UI-type vertical winding inductor, characterized in that: the magnetic core comprises a U-shaped magnetic core and an I-shaped strip block magnetic core arranged at the opening end of the U-shaped magnetic core, wherein a plurality of vertical winding coils are sleeved on the U-shaped magnetic core, the cross section width a and the depth b of the U-shaped magnetic core and the cross section width c and the depth d of the I-shaped strip block magnetic core simultaneously meet d not less than b, and (c multiplied by d)/(a multiplied by b) =0.8-1.3.

2. The UI-type vertical wound inductor according to claim 1, wherein an adhesive is coated on the joint surface of the U-shaped magnetic core and the I-shaped bar magnetic core.

3. The UI-type immediately wound inductor according to claim 1, wherein the cross-sectional width a and the depth b of the U-shaped magnetic core and the cross-sectional width c and the depth d of the I-shaped bar magnetic core satisfy d.gtoreq.b simultaneously, and (c×d)/(a×b) =0.9 to 1.1.

4. The UI-type vertical wound inductor according to claim 1, wherein vertical winding coils sleeved on the annular structure of the U-shaped magnetic core are uniformly distributed, and vertical winding coils sleeved on the strip-shaped structure of the U-shaped magnetic core are also uniformly distributed.

5. The UI-type vertical wound inductor according to claim 4, wherein the density of vertical winding coils sleeved on the annular structure of the U-shaped magnetic core is smaller than the density of vertical winding coils sleeved on the strip-shaped structure of the U-shaped magnetic core.

6. The UI-type vertical wound inductor according to claim 1, wherein a metal bottom plate is fixedly arranged at the lower part of the I-shaped bar magnetic core, and a sinking groove for embedding the lower part of the I-shaped bar magnetic core is arranged on the metal bottom plate.