CN115775677A - High-performance and high-quality integrated inductance element and production process thereof - Google Patents

Abstract

The invention discloses a high-performance high-quality integrated inductance element and a production process thereof, and the high-performance high-quality integrated inductance element comprises two groups of inductance element parts, wherein each group of inductance element parts comprises a soft magnetic cladding body upper assembly and a soft magnetic cladding body lower assembly; the soft magnetic coating body upper assembly comprises a soft magnetic coating body base and a coil, the coil is installed on the soft magnetic coating body base, the coil is provided with a first lead pin and a second lead pin, the soft magnetic coating body base comprises a base plate, the middle of the top surface of the base plate is provided with a limiting groove, one end of the limiting groove is provided with a limiting opening, and the center of the bottom surface of the limiting groove is provided with an installation column; the soft magnetic cladding lower assembly comprises a soft magnetic cladding cover plate and an insulating isolation plate; by adopting the structure, the short circuit and the cracking damage of the element caused by coil package damage and displacement due to non-protection positioning pressing can be reduced, the inductance and the saturation temperature rise performance of the formed inductance element are improved, and the reliability and the performance of the formed inductance element are improved.

Description

A high-performance and high-quality integrated inductance element and its production process

technical field

The invention relates to the technical field of electronic components, in particular to a high-performance and high-quality integrated inductance component and a production process thereof.

Background technique

The original model of the inductance element is a wire wound into a cylindrical coil. When the current i is passed through the coil, a magnetic flux Φ will be generated in the coil and energy will be stored. The electromagnetic induction of the inductance element is divided into self-induction and mutual induction. The self-magnetic field in the coil The electromagnetic induction phenomenon caused by the change of magnetic flux inside the coil is called "self-induction" phenomenon; the electromagnetic induction phenomenon caused by the change of magnetic flux in the external magnetic field in the coil is called "mutual induction" phenomenon.

However, in the existing inductive components, there is no protective positioning and pressing when installing the coil, which causes the position of the coil to shift, which in turn causes uneven wall thickness on both sides, resulting in the problem that the wall thickness on one side is too small, and the structural strength will decrease when the wall thickness becomes smaller. Deterioration, so it leads to cracking, damage to the wire package of the coil, short circuit of the components caused by displacement, and poor damage to the inductance components. This has a great test for the quality and service life of the inductance components. Competitiveness of similar products in the market.

Contents of the invention

In order to overcome the above-mentioned technical problems, the purpose of the present invention is to provide a high-performance and high-quality integrated inductance element and its production process.

The purpose of the present invention can be achieved through the following technical solutions:

A high-performance and high-quality integrated inductance element, including two sets of inductance unit elements, the two sets of inductance unit elements are symmetrically distributed, and each set of inductance unit elements includes an upper component of a soft magnetic coating and a lower component of a soft magnetic coating;

Wherein the upper component of the soft magnetic covering body includes a base of the soft magnetic covering body and a coil, the coil is installed on the base of the soft magnetic covering body, the coil is provided with a first lead pin and a second lead pin, the The base of the soft magnetic covering body includes a base plate, a limiting groove is provided in the middle of the top surface of the base plate, and a limiting opening is arranged at one end of the limiting groove, and a mounting column is arranged at the center of the bottom surface of the limiting groove;

The lower assembly of the soft magnetic enclosure includes a cover plate of the soft magnetic enclosure and an insulation isolation plate, and the insulation isolation plate is located on the top surface of the cover plate of the soft magnetic enclosure.

As a further solution of the present invention: the height of the mounting column is higher than that of the coil.

As a further solution of the present invention: the height of the mounting column is equal to the height of the coil.

As a further solution of the present invention: the height of the mounting column is smaller than the height of the coil.

As a further solution of the present invention: the cover plate of the soft magnetic covering body and the insulation isolation plate are integrally formed.

As a further solution of the present invention: the cover plate of the soft magnetic covering body and the insulation isolation plate are formed separately.

As a further solution of the present invention: the base of the soft magnetic covering body and the cover plate of the soft magnetic covering body are both made of soft magnetic powder.

As a further solution of the present invention: a production process of a high-performance and high-quality integrated inductance element, comprising the following steps:

Step 1: Put the coil on the mounting column of the base of the soft magnetic covering body, and place it in the limit slot, then bend the first lead pin and the second lead pin, and connect the limit opening with the first lead wire The feet correspond to the limit, and the upper component of the soft magnetic covering is obtained;

Step 2: Put an upper assembly of the soft magnetic covering body in the extrusion mold, and then put a prefabricated lower assembly of the soft magnetic covering body upright into the extrusion mold;

Step 3: Put an inverted prefabricated soft magnetic covering body lower assembly again in the extrusion mold, and then put an inverted soft magnetic covering body upper assembly, wherein the two first lead pins and the second lead The feet are facing on the same side;

Step 4: Extruding to obtain a semi-finished inductance element, taking out the semi-finished inductance element, and electroplating and tinning the exposed first and second lead pins to obtain a finished inductance element.

Beneficial effects of the present invention:

1. The present invention preforms the base of the soft magnetic coating body and sets the installation column to ensure the positioning protection when the coil is installed, and the coil is fixed by the installation column during pressing to ensure the stability of the coil position during the pressing process. Reduce coil package damage caused by unprotected positioning and pressing, component short circuit, cracking and damage caused by displacement.

2. The present invention further reduces the external dimension of the finished inductive element, especially the thickness is reduced by 3mm, and the small integrated inductive element made provides better space utilization preconditions for the small circuit board to carry and connect more elements, while reducing the manufacturing cost. The loss of raw materials such as iron powder, copper, and tin is required.

3. The structure of the inductance element of the present invention realizes the miniaturization of the integrated inductance element, and at the same time improves the inductance of the integral inductance element by about 14%, the saturation performance by 10% and the DCR characteristic by 50%, and further improves the reliability of the formed inductance element with performance.

Description of drawings

The present invention will be further described below in conjunction with the accompanying drawings.

Fig. 1 is the structural representation of finished product inductance element of the present invention;

Fig. 2 is a schematic diagram of a coil structure in the present invention;

Fig. 3 is a schematic diagram of the overall structure of the base of the soft magnetic coating in Embodiment 1 of the present invention;

Fig. 4 is a schematic diagram of the overall structure of the lower component of the soft magnetic coating in Embodiment 1 of the present invention;

Fig. 5 is a schematic diagram of the overall structure of the upper assembly of the soft magnetic coating in Embodiment 1 of the present invention;

Fig. 6 is a schematic diagram of the extrusion position of the production process of Embodiment 1 of the present invention;

Fig. 7 is a schematic diagram of the overall structure of the base of the soft magnetic covering body in Embodiment 2 of the present invention;

Fig. 8 is a schematic diagram of the overall structure of the lower assembly of the soft magnetic coating in Embodiment 2 of the present invention;

Fig. 9 is a schematic diagram of the overall structure of the upper assembly of the soft magnetic coating in the second embodiment of the present invention;

Fig. 10 is a schematic diagram of the extrusion position of the production process of Example 2 of the present invention;

Fig. 11 is a schematic diagram of deformation of the cover body of the soft magnetic coating in the second embodiment of the present invention;

Fig. 12 is a schematic diagram of deformation of the base of the soft magnetic covering body in Embodiment 2 of the present invention;

Fig. 13 is the second schematic diagram of the deformation of the soft magnetic covering body cover structure in the second embodiment of the present invention;

Fig. 14 is the second schematic diagram of the deformation of the base of the soft magnetic coating in the second embodiment of the present invention;

Fig. 15 is the third schematic diagram of the structural deformation of the soft magnetic covering body cover in the second embodiment of the present invention;

Fig. 16 is the third schematic diagram of the structural deformation of the base of the soft magnetic coating in the second embodiment of the present invention;

Fig. 17 is a fourth schematic diagram of the structural deformation of the soft magnetic covering body cover in the second embodiment of the present invention;

Fig. 18 is a fourth schematic diagram of the structural deformation of the base of the soft magnetic coating in the second embodiment of the present invention;

Fig. 19 is a fifth schematic diagram of the deformation of the base structure of the soft magnetic covering body in the second embodiment of the present invention.

In the figure: 1, coil; 101, first lead pin; 102, second lead pin; 2, soft magnetic coating body base; 21, mounting column; 22, base plate; 23, limit slot; 24, limit Opening; 202, the bottom plate; 203, the first groove; 204, the second groove; 3, the lower component of the soft magnetic coating; 30, the cover plate of the soft magnetic coating; 31, the cover of the soft magnetic coating ; 311 , placement groove; 312 , positioning opening; 32 , insulating isolation plate; 4 , soft magnetic cladding upper assembly; 5 , inductance unit.

Detailed ways

The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

Embodiment one:

As shown in Figures 1 to 6, a high-performance and high-quality integrated inductance element includes two sets of inductance unit elements 5, and the two sets of inductance unit elements 5 are symmetrically distributed about the bonding surface, and each set of inductance unit elements 5 includes a soft magnetic The upper assembly 4 of the covering body and the lower assembly 3 of the soft magnetic covering body are assembled through the corresponding upper assembly 4 of the soft magnetic covering body and the lower assembly 3 of the soft magnetic covering body to form an inductance unit element 5, and then the two groups of inductance units Part 5 is placed in an extrusion die and pressed into one body to form the inductance element.

Further as shown in Fig. 2, Fig. 3 and Fig. 5, the upper assembly 4 of the soft magnetic covering body includes a soft magnetic covering body base 2 and a coil 1, and the coil 1 is installed on the soft magnetic covering body base 2, wherein the coil 1. The first lead pin 101 and the second lead pin 102 are provided. The above-mentioned soft magnetic covering body base 2 includes a base plate 22, and a limiting groove 23 is opened in the middle of the top surface of the base plate 22, and one end of the limiting groove 23 It is arranged in an arc shape, and one end is rectangular, and a limited opening 24 is opened at one end of the rectangular surface, which is used to position the first lead pin 101 or the second lead pin 102 on the installation, and limit the position to facilitate subsequent pressing, further The center of the bottom surface of the limiting groove 23 is provided with a mounting column 21 for assembly and positioning, and the shape of the mounting 21 includes but is not limited to a circle and an ellipse. The cover body base 2 is assembled and formed, wherein the first lead pin 101 and the second lead pin 102 need to be bent twice during the installation process of the coil 1, and the first bend makes the first lead pin 101 and the second lead pin 102 bend To the corresponding side of the base plate 22 , the second bending bends the first lead pin 101 and the second lead pin 102 to the bottom surface of the base plate 22 and closely adheres to the bottom surface of the base plate 22 .

Furthermore, as shown in Figure 3, the height of the mounting column 21 can be higher than the height of the coil 1, equal to the height of the coil 1 or lower than the height of the coil 1, and various sizes are available.

As further shown in FIG. 4 , the lower assembly 3 of the soft magnetic coating includes a soft magnetic coating cover plate 30 and an insulating isolation plate 32, wherein the soft magnetic coating cover plate 30 is a flat plate, which is convenient to fit on the soft magnetic coating. The assembly 4 seals the coil 1, wherein the insulating isolation plate 32 is located on the top surface of the soft magnetic covering body cover plate 30; it should be noted that the soft magnetic covering body cover plate 30 and the insulating insulating plate 32 can be formed integrally or separately , when the inductance element is finally formed, it only needs to be placed and squeezed in order, and the further two sets of soft magnetic coating lower components 3 can also be integrally formed or separately formed.

Further, the soft magnetic covering body base 2 and the soft magnetic covering body cover plate 30 are all made of soft magnetic powder. Commonly used soft magnetic materials include ferrite, iron powder core, amorphous alloy, etc. Compression deformation, the material of the above-mentioned insulation and isolation plate 32 is ceramic, polymer, nanometer and metal particle material after insulation coating.

Further, in the prefabrication process of the above-mentioned soft magnetic cladding cover plate 30 and insulating spacer plate 32 , powder filling prefabrication can also be carried out, and cutting prefabrication can also be carried out.

The further production process of the high-performance and high-quality integrated inductive element includes the following schemes:

Option One:

Step A1: Put the coil 1 on the mounting column 21 of the base 2 of the soft magnetic covering body, and place it in the limiting groove 23, and then bend the first lead pin 101 and the second lead pin 102, wherein the limit The position opening 24 is corresponding to the first lead pin 101, and the number of times of bending is two times. The first bend bends the first lead pin 101 and the second lead pin 102 to one side of the base plate 22 where the limit opening 24 is opened. side, bend the first lead pin 101 and the second lead pin 102 to the bottom surface of the base plate 22 for the second bending, and closely adhere to the bottom surface of the base plate 22 to obtain the upper assembly 4 of the soft magnetic coating;

Step A2: Put a soft magnetic covering body upper assembly 4 in the extrusion die, and then place a prefabricated soft magnetic covering body lower assembly 3 (wherein the soft magnetic covering body cover plate 30 and the insulation isolation plate 32 are Integral molding) put into the extrusion mold upright;

Step A3: Put an inverted prefabricated soft magnetic cladding lower assembly 3 again in the extrusion mold (wherein the soft magnetic cladding cover plate 30 and the insulation isolation plate 32 are integrally formed), and then put an inverted The upper assembly 4 of the soft magnetic coating, wherein the orientation of the two first lead pins 101 and the second lead pins 102 is on the same side;

Step A4: Extrude to obtain a semi-finished inductance element, take out the semi-finished inductance element, and perform electroplating and tinning on the exposed first lead pin 101 and second lead pin 102 to obtain a finished inductance element (wherein the size of the tin plating based on the longer lead pin).

Option II:

Step B1: Put the coil 1 on the mounting column 21 of the base 2 of the soft magnetic covering body, and place it in the limiting groove 23, and then bend the first lead pin 101 and the second lead pin 102, wherein the limit The position opening 24 is corresponding to the first lead pin 101, and the number of times of bending is two times. The first bend bends the first lead pin 101 and the second lead pin 102 to one side of the base plate 22 where the limit opening 24 is opened. side, bend the first lead pin 101 and the second lead pin 102 to the bottom surface of the base plate 22 for the second bending, and closely adhere to the bottom surface of the base plate 22 to obtain the upper assembly 4 of the soft magnetic coating;

Step B2: Put a soft magnetic coating upper assembly 4 in the extrusion die, then put a prefabricated soft magnetic coating lower assembly (wherein the soft magnetic coating lower assembly is composed of two The lower component 3 of the soft magnetic coating is pre-pressed in one piece) and placed upside down into the extrusion mold;

Step B3: Putting an upside-down soft magnetic covering upper assembly 4 in the extrusion mold again, wherein the orientation of the two first lead pins 101 and the second lead pins 102 is on the same side;

Step B4: Extrude to obtain a semi-finished inductance element, take out the semi-finished inductance element, and perform electroplating and tinning on the exposed first lead pin 101 and second lead pin 102 to obtain a finished inductance element (wherein the size of the tin plating based on the longer lead pin).

third solution:

Step C1: Put the coil 1 on the mounting column 21 of the base 2 of the soft magnetic covering body, and place it in the limiting groove 23, and then bend the first lead pin 101 and the second lead pin 102, wherein the limit The position opening 24 is corresponding to the first lead pin 101, and the number of times of bending is two times. The first bend bends the first lead pin 101 and the second lead pin 102 to one side of the base plate 22 where the limit opening 24 is opened. side, bend the first lead pin 101 and the second lead pin 102 to the bottom surface of the base plate 22 for the second bending, and closely adhere to the bottom surface of the base plate 22 to obtain the upper assembly 4 of the soft magnetic coating;

Step C2: Put a soft magnetic covering body upper assembly 4 in the extrusion die, and then place a prefabricated soft magnetic covering body cover plate 30 (wherein the soft magnetic covering body cover plate 30 and the insulating isolation plate 32 are separate molding) and put it upside down into the extrusion die;

Step C3: Put two prefabricated insulating spacers 32 in the extrusion die, and then put in a prefabricated soft magnetic covering body cover plate 30 (wherein the soft magnetic covering body cover plate 30 It is molded separately from the insulating spacer plate 32), and then put into an upside-down soft magnetic covering body assembly 4, wherein the direction of the two first lead pins 101 and the second lead pin 102 is on the same side;

Step C4: Extrude to obtain a semi-finished inductance element, take out the semi-finished inductance element, and perform electroplating and tinning on the exposed first lead pin 101 and second lead pin 102 to obtain a finished inductance element (wherein the size of the tin plating based on the longer lead pin).

Embodiment two:

Compared with Embodiment 1, the difference of this embodiment is that, as shown in Figures 7-10, the structure of the soft magnetic coating base 2 is different, and the soft magnetic coating base 2 in this embodiment includes Bottom plate 202, in the middle of the top surface of bottom plate 202 is provided with the same mounting column 21 as in Embodiment 1, and one side of bottom plate 202 is provided with a first groove 203 and a second groove 204, wherein the first groove 203 and the second groove The two grooves 204 are distributed symmetrically about the longitudinal centerline of the bottom plate 202. The upper component 4 of the soft magnetic covering body is formed by assembling the coil 1 and the base 2 of the soft magnetic covering body. A lead pin 101 and a second lead pin 102 are bent for the first time so that the first lead pin 101 and the second lead pin 102 are bent into the corresponding first groove 203 and the second groove 204, and the second bend is Bending the first lead pin 101 and the second lead pin 102 to the bottom surface of the bottom plate 202 , and closely attaching to the bottom surface of the bottom plate 202 .

Similarly, the height of the mounting column 21 in the second embodiment can also be higher than the height of the coil 1 , equal to the height of the coil 1 or lower than the height of the coil 1 , and various sizes are available.

Further, the difference of this embodiment is that, as shown in FIG. 8 , the soft magnetic covering body cover 31 replaces the soft magnetic covering body cover 30 in the soft magnetic covering body lower assembly 3 , wherein the soft magnetic covering body cover 31 One side is provided with a placement groove 311 for assembling with the coil 1 in the upper assembly 4 of the soft magnetic covering body, and one end of the further placement groove 311 is provided with a positioning opening 312, which is convenient for the first lead pin 101 or the second lead wire The feet 102 are positioned, wherein the insulating isolation plate 32 is located on the opposite side of the soft magnetic covering body cover 31 where the groove 311 is placed; it should be noted that the soft magnetic covering body cover 31 and the insulating insulating plate 32 are integrally formed Or separate molding, when the inductance element is finally formed, it only needs to be placed and pressed in sequence, and the material of the soft magnetic coating body cover 31 and the soft magnetic coating body cover plate 30 is the same.

Further, as shown in Figures 11-18, the soft magnetic covering body cover 31 and the soft magnetic covering body base 2 of this embodiment can adopt various corresponding structures for cooperation:

A: As shown in Figure 11 and Figure 12, the installation column 21 is the same as this embodiment, and the positioning opening 312 is a full-through opening, which communicates with the placement groove 311;

B: As shown in Figure 13 and Figure 14, both the placement groove 311 and the bottom plate 202 are provided with installation columns 21, and the dimensions of the two installation columns 21 match each other, and the positioning opening 312 is a full-through opening, communicating with the placement groove 311 , and two grooves are provided below the positioning opening 312 to correspond to the first groove 203 and the second groove 204;

C: As shown in Figures 15-16, both the placement groove 311 and the bottom plate 202 are provided with mounting columns 21, and the dimensions of the two mounting columns 21 match each other, and the others are consistent with the second embodiment;

D: As shown in Figures 17-18, the installation column 21 remains unchanged, the difference is that the end of the bottom plate 202 away from the positioning protrusion 205 has a rounded corner, and the corresponding soft magnetic covering body cover 31 is provided with a groove 311 to form a step On the surface, the step height is equal to the thickness of the bottom plate 202 , and the bottom plate 202 with rounded corners fits on the stepped soft magnetic covering body cover 31 .

E: As shown in Figure 19, the mounting column 21 remains unchanged, the difference is that the bottom plate 202 is cross-shaped, and the corresponding soft magnetic covering body 31 can be in any shape.

This embodiment is different from the first embodiment except for the structural features of the above differences, and the other structures are completely the same as the first embodiment.

The further production process of the high-performance and high-quality integrated inductive element includes the following schemes:

Option four:

Step D1: Put the coil 1 on the mounting column 21 of the base 2 of the soft magnetic covering body, and then bend the first lead pin 101 and the second lead pin 102, the number of bending times is two times, and the first bend The first lead pin 101 and the second lead pin 102 are bent into the corresponding first groove 203 and the second groove 204, and the second bending bends the first lead pin 101 and the second lead pin 102 to the bottom The bottom surface of the flat plate 202 is closely attached to the bottom surface of the bottom flat plate 202 to obtain the upper assembly 4 of the soft magnetic coating;

Step D2: Put a soft magnetic covering body upper assembly 4 in the extrusion die, and then place a prefabricated soft magnetic covering body lower assembly 3 (wherein the soft magnetic covering body cover 31 and the insulating isolation plate 32 are Integral molding) put it upside down into the extrusion mold, and position the positioning opening 312 corresponding to the first lead pin 101;

Step D3: Put a prefabricated soft magnetic covering body lower assembly 3 (wherein the soft magnetic covering body cover 31 and the insulation isolation plate 32 are integrally formed) in the extrusion mold again, and then put a The upper assembly 4 of the soft magnetic coating is inverted, wherein the orientations of the two first lead pins 101 and the second lead pins 102 are on the same side;

Step D4: Extrude to obtain a semi-finished inductance element, take out the semi-finished inductance element, and perform electroplating and tinning on the exposed first lead pin 101 and second lead pin 102 to obtain a finished inductance element (wherein the size of the tin plating based on the longer lead pin).

Option five;

Step E1: Put the coil 1 on the mounting column 21 of the base 2 of the soft magnetic coating, and then bend the first lead pin 101 and the second lead pin 102, the number of times of bending is two times, and the first bend The first lead pin 101 and the second lead pin 102 are bent into the corresponding first groove 203 and the second groove 204, and the second bending bends the first lead pin 101 and the second lead pin 102 to the bottom The bottom surface of the flat plate 202 is closely attached to the bottom surface of the bottom flat plate 202 to obtain the upper assembly 4 of the soft magnetic coating;

Step E2: Put a soft magnetic coating upper assembly 4 in the extrusion die, and then place a prefabricated soft magnetic coating cover 31 (wherein the soft magnetic coating cover 31 and the insulation isolation plate 32 are separate molding) and put it upside down into the extrusion mold, and position the positioning opening 312 corresponding to the first lead pin 101;

Step E3: Put two prefabricated insulating spacers 32 in the extrusion die, and then put in a prefabricated soft magnetic covering body cover 31 (wherein the soft magnetic covering body cover 31 It is molded separately from the insulating spacer plate 32), and then put into an upside-down soft magnetic covering body assembly 4, wherein the direction of the two first lead pins 101 and the second lead pin 102 is on the same side;

Step E4: Extrude to obtain a semi-finished inductance element, take out the semi-finished inductance element, and perform electroplating and tinning on the exposed first lead pin 101 and second lead pin 102 to obtain a finished inductance element (wherein the size of the tin plating based on the longer lead pin).

Option six;

Step F1: Put the coil 1 on the mounting column 21 of the base 2 of the soft magnetic coating, and then bend the first lead pin 101 and the second lead pin 102. The number of bends is two times, and the first bend The first lead pin 101 and the second lead pin 102 are bent into the corresponding first groove 203 and the second groove 204, and the second bending bends the first lead pin 101 and the second lead pin 102 to the bottom The bottom surface of the flat plate 202 is closely attached to the bottom surface of the bottom flat plate 202 to obtain the upper assembly 4 of the soft magnetic coating;

Step F2: Put a soft magnetic coating upper assembly 4 in the extrusion die, and then place a prefabricated soft magnetic coating cover 31 (wherein the soft magnetic coating cover 31 and the insulating isolation plate 32 are separate molding) and put it upside down into the extrusion mold, and position the positioning opening 312 corresponding to the first lead pin 101;

Step F3: put a prefabricated insulating spacer 32 in the extrusion die (wherein the thickness of the insulating spacer 32 is twice that of Embodiment 1 and Embodiment 2), and then put a prefabricated prefabricated The soft magnetic covering body cover 31 (wherein the soft magnetic covering body cover 31 and the insulating spacer plate 32 are molded separately), then put into an inverted soft magnetic covering body upper assembly 4, wherein the two first leads The direction of the pin 101 and the second lead pin 102 is on the same side;

Step F4: Extrude to obtain a semi-finished inductance element, take out the semi-finished inductance element, and perform electroplating and tinning on the exposed first lead pin 101 and second lead pin 102 to obtain a finished inductance element (wherein the size of the tin plating based on the longer lead pin).

Further carry out performance test for the integral inductance element of the present invention and traditional integral inductance element, wherein thickness adopts vernier caliper to detect, and inductance adopts inductance ammeter (model is H IOKI I M3536) to detect, and the feeling after saturation is to use winding element Pulse tester (model Chroma 3302), DCR ammeter for direct current resistance (model GOM804), the experimental data obtained are as follows Table 1 and Table 2;

Table 1 is the integrated inductance element data of the present invention:

Table 2 shows the data of traditional integrated inductance components:

Through the comparison of the experimental data in Table 1 and Table 2, it can be seen that compared with the traditional integrated inductance element, the integrated inductance element of the present invention is more miniaturized in size, and the thickness is reduced by 0.3mm. In terms of inductance, the integrated inductance element of the present invention The improvement is about 14%. Under the condition of 6.6A, the saturation characteristic of the integrated inductance element of the present invention is improved by about 10%, and the further DCR characteristic is improved by about 50%.

Where DCR is the DC resistance in mΩ. For inductors of the same size, the DC resistance usually exhibits the following characteristics: If the inductance value is high, the DC resistance value is high; if the inductance value is low, the DC resistance value lower.

An embodiment of the present invention has been described in detail above, but the content described is only a preferred embodiment of the present invention, and cannot be considered as limiting the implementation scope of the present invention. All equivalent changes and improvements made according to the application scope of the present invention shall still belong to the scope covered by the patent of the present invention.

Claims (8)

1. A high-performance high-quality integrated inductance element is characterized by comprising two groups of inductance unit pieces (5), wherein the two groups of inductance unit pieces (5) are symmetrically distributed, and each group of inductance unit pieces (5) comprises a soft magnetic cladding body upper assembly (4) and a soft magnetic cladding body lower assembly (3);

the soft magnetic coating upper assembly (4) comprises a soft magnetic coating base (2) and a coil (1), the coil (1) is installed on the soft magnetic coating base (2), the coil (1) is provided with a first lead pin (101) and a second lead pin (102), the soft magnetic coating base (2) comprises a base plate (22), a limiting groove (23) is formed in the middle of the top surface of the base plate (22), one end of the limiting groove (23) is provided with a limiting opening (24), and an installation column (21) is arranged in the center of the bottom surface of the limiting groove (23);

the soft magnetic cladding body lower assembly (3) comprises a soft magnetic cladding body cover plate (30) and an insulating isolation plate (32), and the insulating isolation plate (32) is located on the top surface of the soft magnetic cladding body cover plate (30).

2. A high performance high quality integral inductor component according to claim 1, characterized in that the height of the mounting posts (21) is higher than the height of the coil (1).

3. A high performance high quality integral inductor component according to claim 1, characterized in that the height of the mounting posts (21) is equal to the height of the coil (1).

4. A high performance high quality integral inductor component according to claim 1, characterized in that the height of the mounting posts (21) is less than the height of the coil (1).

5. A high performance, high quality integrated inductor component as claimed in claim 1, characterized in that the soft magnetic cladding cover plate (30) is formed integrally with the insulating spacer plate (32).

6. A high performance, high quality integrated inductor component as claimed in claim 1, characterized in that the soft magnetic cladding cover plate (30) and the insulating spacer plate (32) are formed separately.

7. A high performance high quality integral inductor component as claimed in claim 1, characterized in that said soft magnetic cladding base (2) and said soft magnetic cladding cover plate (30) are made of soft magnetic powder.

8. A process for producing a high-performance high-quality integral inductive component according to claim 1, characterized by comprising the following steps:

step one; sleeving the coil (1) on the mounting column (21) of the soft magnetic cladding body base (2), placing the coil in the limiting groove (23), bending the first lead pin (101) and the second lead pin (102), and correspondingly limiting the limiting opening (24) and the first lead pin (101) to obtain the soft magnetic cladding body upper assembly (4);

step two; placing a soft magnetic coating upper component (4) in an extrusion die, and then placing a prefabricated soft magnetic coating lower component (3) in the extrusion die in a positive mode;

step three; placing an inverted pre-formed soft magnetic cladding lower component (3) in the extrusion die again, and then placing an inverted soft magnetic cladding upper component (4), wherein the two first terminal pins (101) and the two second terminal pins (102) face the same side;

step four; and extruding to obtain a semi-finished inductive element, taking out the semi-finished inductive element, and electroplating and tinning the exposed first pin (101) and the second pin (102) to obtain the finished inductive element.

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