CN210722690U

CN210722690U - DUT magnetic element

Info

Publication number: CN210722690U
Application number: CN201921535244.4U
Authority: CN
Inventors: 黄思忠; 林金城; 黄文龙
Original assignee: Xiamen Nanci Electronics Co ltd
Current assignee: Xiamen Nanci Electronics Co ltd
Priority date: 2019-09-16
Filing date: 2019-09-16
Publication date: 2020-06-09
Anticipated expiration: 2029-09-16

Abstract

The utility model relates to an inductor technical field, in particular to DUT magnetic element, be the second magnetic core of U type, two including two first magnetic cores that the cross-section is the T type and two cross-sections first magnetic core corresponds the relative center pillar magnetic core that forms the cross-section and be "worker" style of calligraphy that sets up of T type bottom end face, two have first interval just between the first magnetic core first interval intussuseption is filled with first air gap, two second magnetic core symmetric distribution is in the both sides of center pillar magnetic core, the opening orientation of second magnetic core the center pillar magnetic core, just the second magnetic core extremely interval intussuseption between the center pillar magnetic core is filled with the second air gap. The more the number of air gaps are arranged in the magnetic piece, the smaller the amplitude of the diffused magnetic flux entering the coil is, the lower the electromagnetic loss and the higher the electromagnetic conversion efficiency, and the shielding function is realized.

Description

DUT magnetic element

Technical Field

The utility model relates to an inductor technical field, in particular to DUT magnetic element.

Background

The conventional coil inductor generally comprises a magnetic core and a coil, and in order to prevent magnetic saturation, a magnetic circuit air gap is usually provided in a magnetic circuit. As known from patent publication No. CN207217212U, there is a UUI type combined magnetic core in the prior art, which refers to a combination including an I type magnetic core and two U type magnetic cores, and a sheet-like air gap medium is provided at a mating surface where the U type magnetic core and the I type magnetic core are in contact with each other.

However, the air gap of the existing UUI-type combined magnetic core still has diffused magnetic flux which extends into the coil, so that the electromagnetic conversion efficiency of the magnetic core is reduced, and the loss is increased.

SUMMERY OF THE UTILITY MODEL

In order to overcome the defects of the prior art, the utility model aims to solve the technical problem that a DUT magnetic element is provided, which can reduce the diffusion magnetic flux, reduce the electromagnetic loss and improve the electromagnetic conversion efficiency.

In order to solve the technical problem, the utility model discloses a technical scheme be:

a DUT magnetic element comprises two first magnetic cores with T-shaped cross sections and two second magnetic cores with U-shaped cross sections, wherein the two first magnetic cores are oppositely arranged corresponding to the bottom end faces of the T-shaped cross sections to form center pillar magnetic cores with I-shaped cross sections, a first space is formed between the two first magnetic cores, a first air gap is filled in the first space, the two second magnetic cores are symmetrically distributed on two sides of the center pillar magnetic cores, the openings of the second magnetic cores face the center pillar magnetic cores, and a second air gap is filled in the space from the second magnetic cores to the center pillar magnetic cores.

Further, the air gap amount of the second air gap is equal to the air gap amount of the first air gap.

Further, the distance between the second magnetic core and the center pillar magnetic core is equal to the first distance.

Furthermore, the area of the vertical section of the first magnetic core corresponding to the first part in the T shape is equal to the area of the end face of the second magnetic core corresponding to the side wall of the U shape.

Further, the height of the center pillar magnetic core is equal to the width of the corresponding U-shaped opening of the second magnetic core.

The beneficial effects of the utility model reside in that: in the DUT magnetic element, two first magnetic cores are oppositely arranged corresponding to a T-shaped bottom end face to form a center pillar magnetic core with an I-shaped cross section, a first distance is formed between the two first magnetic cores, a first air gap is filled in the first distance, the two second magnetic cores are symmetrically distributed on two sides of the center pillar magnetic core, the opening of the second magnetic core faces the center pillar magnetic core, and a second air gap is filled in the distance from the second magnetic core to the center pillar magnetic core. The more the number of air gaps are arranged in the magnetic piece, the smaller the amplitude of the diffused magnetic flux entering the coil is, the lower the electromagnetic loss is, the higher the electromagnetic conversion efficiency is, and the shielding function is realized.

Drawings

FIG. 1 is an exploded view of a DUT magnetic element of the present invention;

FIG. 2 is a schematic diagram illustrating the assembly of a DUT magnetic element of the present invention;

description of reference numerals:

1. a first magnetic core; 2. a second magnetic core.

Detailed Description

In order to explain the technical content, the objects and the effects of the present invention in detail, the following description is made with reference to the accompanying drawings in combination with the embodiments.

Referring to fig. 1 to 2, a DUT magnetic element of the present invention includes two first magnetic cores with T-shaped cross sections and two second magnetic cores with U-shaped cross sections, wherein the first magnetic cores are oppositely disposed corresponding to the T-shaped bottom end surfaces to form a center pillar magnetic core with an i-shaped cross section, two first magnetic cores are spaced apart from each other by a first distance, the first distance is filled with a first air gap, the two second magnetic cores are symmetrically disposed on two sides of the center pillar magnetic core, an opening of the second magnetic core faces the center pillar magnetic core, and a second air gap is filled between the second magnetic core and the center pillar magnetic core.

From the above description, it can be seen that by setting the air gap amount of the second air gap equal to the air gap amount of the first air gap, the distance between the U-shaped magnetic core and the center pillar magnetic core equal to the first distance, the area of the vertical cross section of the "one" portion of the T-shape corresponding to the first magnetic core equal to the area of the end surface of the U-shaped side wall corresponding to the second magnetic core, and the height of the center pillar magnetic core equal to the width of the U-shaped opening corresponding to the second magnetic core, the amplitude of the diffused magnetic flux of the whole DUT magnetic element penetrating into the coil is reduced, the electromagnetic loss is reduced, the electromagnetic conversion efficiency is improved, and the overall effect is optimal.

Referring to fig. 1 to fig. 2, a first embodiment of the present invention is:

the utility model discloses a DUT magnetic element, be the first magnetic core 1 of T type and two second magnetic cores 2 that the cross-section is the U type including two cross-sections first magnetic core 1 corresponds the relative center pillar magnetic core that forms the cross-section and be "worker" style of calligraphy of setting up of T type bottom end face, two have first interval just between the first magnetic core 1 first interval intussuseption is filled with first air gap, two 2 symmetric distributions of second magnetic core are in the both sides of center pillar magnetic core, the opening orientation of second magnetic core 2 the center pillar magnetic core, just second magnetic core 2 extremely interval intussuseption between the center pillar magnetic core is filled with the second air gap. The air gap amount of the second air gap is equal to the air gap amount of the first air gap. The second magnetic core to the interval between the center pillar magnetic core is equal to first interval. The area of the vertical section of the first magnetic core corresponding to the first part in the T shape is equal to the area of the end face of the second magnetic core corresponding to the side wall of the U shape. The height of center pillar magnetic core with the second magnetic core corresponds U type open-ended width equals. The cross-sectional shape of the center pillar magnetic core can be designed to be circular, oval and kidney-shaped.

To sum up, the utility model provides a DUT magnetic element is through two first magnetic core corresponds the relative center pillar magnetic core that forms the cross-section and be "worker" style of calligraphy that sets up of T type bottom end face, two first interval just has between the first magnetic core first interval intussuseption is filled with first air gap, two second magnetic core symmetric distribution is in the both sides of center pillar magnetic core, the opening orientation of second magnetic core the center pillar magnetic core, just the second magnetic core extremely interval intussuseption between the center pillar magnetic core is filled with the second air gap. The more the number of air gaps are arranged in the magnetic piece, the smaller the amplitude of the diffused magnetic flux entering the coil is, the lower the electromagnetic loss is, the higher the electromagnetic conversion efficiency is, and the shielding function is realized.

The above mentioned is only the embodiment of the present invention, and not the limitation of the patent scope of the present invention, all the equivalent transformations made by the contents of the specification and the drawings, or the direct or indirect application in the related technical field, are included in the patent protection scope of the present invention.

Claims

1. The DUT magnetic element is characterized by comprising two first magnetic cores with T-shaped cross sections and two second magnetic cores with U-shaped cross sections, wherein the two first magnetic cores are oppositely arranged corresponding to the bottom end surfaces of the T-shaped cross sections to form center pillar magnetic cores with I-shaped cross sections, a first space is formed between the two first magnetic cores, a first air gap is filled in the first space, the two second magnetic cores are symmetrically distributed on two sides of the center pillar magnetic cores, the openings of the second magnetic cores face the center pillar magnetic cores, and a second air gap is filled in the space from the second magnetic cores to the center pillar magnetic cores.

2. The DUT magnetic element of claim 1, wherein the second air gap is equal in air gap amount to the first air gap.

3. The DUT magnetic element of claim 1, wherein the spacing between the U-shaped core to the king post core is equal to the first spacing.

4. The DUT magnetic element of claim 1, wherein the first core has a vertical cross-section corresponding to a "one" of the T-shape that has an area equal to an area of an end surface of a side wall of the second core corresponding to the U-shape.

5. The DUT magnetic element of claim 1, wherein the height of the king-post core is equal to the width of the corresponding U-shaped opening of the second core.