CN214797043U

CN214797043U - U-shaped magnetic core and transformer

Info

Publication number: CN214797043U
Application number: CN202121091557.2U
Authority: CN
Inventors: 赵海舟; 郑山; 杨瑞国; 余时强
Original assignee: Shenzhen Infypower Co ltd
Current assignee: Shenzhen Infypower Co ltd
Priority date: 2021-05-20
Filing date: 2021-05-20
Publication date: 2021-11-19
Anticipated expiration: 2031-05-20

Abstract

The utility model provides a U-shaped magnetic core and transformer, the U-shaped magnetic core includes two center pillars of parallel arrangement, and connects two the top cap of the same end of center pillar, the top cap part court with two the center pillar place plane vertically extends in a direction, makes the width of top cap is greater than the diameter of center pillar. The utility model discloses a it is peripheral to extend to the center pillar with the top cap part, has reduced the thickness of top cap under the same condition of magnetic core effective sectional area for center pillar heat conduction route shortens, has improved the radiating efficiency of magnetic core.

Description

U-shaped magnetic core and transformer

Technical Field

The utility model belongs to the technical field of switching power supply technique and specifically relates to indicate a U-shaped magnetic core and transformer.

Background

The high-frequency transformer is a core component of the switching power supply, and the volume of the transformer often determines the volume of the power supply. The output power of the switching power supply is increasing, and the power transmitted by the transformer is also challenging. The transmitted power is generally increased by connecting a plurality of transformers in series and parallel or increasing the volume of the transformers. The magnetic circuit can be shared by increasing the volume of the magnetic core, so the magnetic circuit is smaller than the volume of a scheme of connecting a plurality of transformers in series and parallel under the same power level. The traditional method for increasing the volume of the magnetic core is to use a larger magnetic core or to use a plurality of magnetic cores to be spliced, so that the transmitted power is increased. After the magnetic core is enlarged, the ratio of the heat dissipation area to the volume of the magnetic core is continuously reduced, which causes that the heat dissipation inside the magnetic core is difficult and is easy to saturate.

The existing magnetic core has defects when used for water-cooling heat dissipation, for example, an E-shaped or PQ-shaped magnetic core is used, heat needs to be conducted out through a central column of the magnetic core, the central column is designed to be as short as possible when used for water cooling, and therefore, the existing magnetic core occupies a winding space, is difficult to wind and is not beneficial to production and processing; the use of the traditional U-shaped magnetic core has the problem of thick side wall, which is not good for conduction and heat dissipation.

SUMMERY OF THE UTILITY MODEL

Not enough to prior art, the utility model provides a U-shaped magnetic core and transformer aims at solving the problem that inside magnetic core radiating efficiency is low when current switching power supply uses the water-cooling heat dissipation.

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

in a first aspect, a U-shaped magnetic core is provided, which includes two center pillars arranged in parallel, and a top cover connecting the same ends of the two center pillars, wherein the top cover extends partially in a direction perpendicular to a plane where the two center pillars are located, so that the width of the top cover is larger than the diameter of the center pillars.

Wherein, the extended part of the top cover is in a rectangular column shape.

Wherein, the both ends of the part that the top cap extends are the fillet.

Wherein, the both ends of the part that the top cap extends are trapezoidal.

Wherein, the center pillar cross-section is circular, oval or runway shape.

The top cover is provided with a groove on one surface opposite to the extending direction of the top cover.

The second aspect provides a transformer, including two as the first aspect U-shaped magnetic core to and two solenoid, apron, heat dissipation shell, two four center pillars of U-shaped magnetic core are located according to two liang of relative and symmetries in the cross-section in the heat dissipation shell, two the solenoid twines respectively on two pairs of center pillars that the cross-section is relative, the apron lid closes on the heat dissipation shell, just heat dissipation window has been seted up on the apron.

The number of the heat dissipation windows is two, and the heat dissipation windows correspond to the positions of the middle columns.

And gaps between each pair of the center pillars with the opposite cross sections and gaps between the two U-shaped magnetic cores and the heat dissipation shell are filled with heat-conducting glue.

The beneficial effects of the utility model reside in that:

the utility model provides an in the U-shaped magnetic core, the top cap part of connecting two center pillars extends to the center pillar periphery, makes the top cap can be directly with the cooling surface contact, has reduced the thickness of top cap under the same circumstances of magnetic core effective sectional area for center pillar heat conduction route shortens, has improved the radiating efficiency.

Drawings

The following detailed description of the specific structure of the present invention with reference to the accompanying drawings

Fig. 1 is a schematic structural diagram of a U-shaped magnetic core according to a first embodiment of the present invention;

fig. 2 is a schematic structural diagram of a U-shaped magnetic core according to a second embodiment of the present invention;

fig. 3 is a schematic structural diagram of a U-shaped magnetic core according to a third embodiment of the present invention;

fig. 4 is a schematic structural view of a U-shaped magnetic core and a coil according to a fourth embodiment of the present invention;

fig. 5 is a schematic structural diagram of a transformer according to a fifth embodiment of the present invention.

Detailed Description

In order to explain technical contents, structural features, and objects and effects of the present invention in detail, the following description is given in conjunction with the embodiments and the accompanying drawings.

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present invention, and should not be construed as limiting the present invention.

Referring to fig. 1 to 3, fig. 1 is a schematic structural view of a U-shaped magnetic core according to a first embodiment of the present invention, fig. 2 is a schematic structural view of a U-shaped magnetic core according to a second embodiment of the present invention, and fig. 3 is a schematic structural view of a U-shaped magnetic core according to a third embodiment of the present invention.

Referring to fig. 1, a U-shaped magnetic core includes two center pillars 100 disposed in parallel, and a top cover 200 connecting the same ends of the two center pillars 100, wherein the top cover 200 partially extends in a direction perpendicular to a plane where the two center pillars 100 are located, such that a width of the top cover 200 is greater than a diameter of the center pillars 100.

The beneficial effects of the utility model reside in that:

the utility model provides an in the U-shaped magnetic core, the top cap part of connecting two center pillars extends to the center pillar periphery, makes the top cap can be directly with the cooling surface contact, when the magnetic core effective sectional area (be similar to the top cap sectional area) is the same, top cap thickness is thinner, and the center pillar shortens at the ascending heat conduction route of axial, has improved the radiating efficiency of magnetic core.

Further, the extended portion of the top cover 200 has a rectangular column shape.

Further, referring to fig. 2, both ends of the extending portion of the top cover 200 are rounded. The rounded corners allow the U-shaped core to be more easily assembled and hands-free when mated with other heat dissipating components.

Further, referring to fig. 3, the top cover 200 extends to form a trapezoid shape at both ends. By enlarging the outwardly extending portion of the top cover 200, the heat dissipation area of the bottom surface and the side surface of the top cover 200 can be effectively increased.

Further, the center pillar 100 has a circular, oval or racetrack shape in cross section.

Further, the top cover 200 is provided with a groove 300 on a surface opposite to the extending direction thereof. The groove 300 facilitates the fixation of the winding.

Referring to fig. 4 to 5, fig. 4 is a schematic structural view illustrating a connection between a U-shaped magnetic core and a coil according to a fourth embodiment of the present invention, and fig. 5 is a schematic structural view illustrating a transformer according to a fifth embodiment of the present invention.

As shown in fig. 4 to 5, a transformer includes two U-shaped magnetic cores 10 as described in the above embodiments, and two coils 20, a cover plate 30, and a heat dissipation casing 40, two four center pillars 100 of the U-shaped magnetic core 10 are symmetrically disposed in the heat dissipation casing 40 in a pairwise opposite manner according to the cross section, two coils 20 are respectively wound on two pairs of center pillars 100 with opposite cross sections, the cover plate 30 covers the heat dissipation casing 40, and the cover plate 30 is provided with a heat dissipation window 31.

Specifically, the cover plate 30 is provided with a wire outlet pin 32 connected with a wire outlet end of the wire coil 20, and the heat dissipation shell 40 is provided with a fixing pin 41 for matching and positioning with a positioning hole on the cover plate 30.

Further, the heat dissipation windows 31 are two and correspond to the positions of the center pillars 100.

Further, the gaps between each pair of the center pillars 100 with the opposite cross sections and the gaps between the two U-shaped magnetic cores 10 and the heat dissipation case 40 are filled with a thermally conductive adhesive.

The above only is the embodiment of the present invention, not limiting the patent scope of the present invention, all the equivalent structures or equivalent processes that are used in the specification and the attached drawings or directly or indirectly applied to other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A U-shaped magnetic core, characterized by, including two center pillars arranged in parallel, and a top cover connecting the same ends of the two center pillars, the top cover part extends towards a direction perpendicular to the plane where the two center pillars are located, making the width of the top cover larger than the diameter of the center pillars.

2. The U-shaped magnetic core according to claim 1, wherein the portion of the top cover extending therefrom has a rectangular column shape.

3. The U-shaped magnetic core according to claim 1, wherein the portion of the top cover extending therefrom is rounded at both ends.

4. The U-shaped magnetic core according to claim 1, wherein the portion of the top cover extending therefrom is trapezoidal in shape at both ends.

5. The U-shaped magnetic core according to claim 1, wherein the center leg has a circular, oval or racetrack cross-section.

6. A U-shaped magnetic core according to claim 1, characterized in that the top cover is provided with a recess on the side opposite to the direction in which it extends.

7. A transformer, characterized in that, includes two U-shaped magnetic cores of any one of claims 1 to 6, and two solenoid, apron, heat dissipation shell, two four center posts of the U-shaped magnetic core are according to two pairwise opposite and symmetry locates in the heat dissipation shell of cross-section, two solenoid twine respectively on two pairs of center posts that the cross-section is relative, the apron lid closes on the heat dissipation shell, just seted up the heat dissipation window on the apron.

8. The transformer of claim 7, wherein the heat dissipation window has two, and corresponds to a position of the center leg.

9. The transformer of claim 7, wherein the gaps between each pair of the opposing legs and the gaps between the two U-shaped cores and the heat sink housing are filled with a thermally conductive paste.