CN112017849A - Electromagnetic components with thermally conductive structures and coils - Google Patents

Abstract

An electromagnetic element with heat conducting structure and coil comprises a frame body including an outer frame made of magnetically conductive material; the outer frame comprises at least one opening and at least one strut which is made of magnetic conductive material, one end of the strut is positioned at one side of the outer frame, and the other end is positioned at the other side of the outer frame; wherein the frame body formed by the outer frame and the at least one strut forms a closed loop, so that a magnetic field can pass through the frame body from a point to form a closed loop; at least one coil, each coil surrounding the corresponding pillar of the at least one pillar, wherein two ends of the coil extend out of the inner space of the outer frame of the frame body for guiding current to enter and exit; an adhesive area is located in the inner space of the outer frame of the frame body, wherein the adhesive area is formed by heat-conducting adhesive and is arranged between the coil and the support wrapped by the coil and between the coil and the corresponding inner side edge of the frame body at the periphery.

Description

Electromagnetic components with thermally conductive structures and coils

technical field

The invention relates to an electromagnetic element, in particular to an electromagnetic element with a heat-conducting structure and a coil.

Background technique

As shown in FIG. 5 , the method of manufacturing an inductor in the prior art mainly uses a spiral ring structure, and a ring-shaped magnetic conducting ring 31' is covered by a spiral-ring coil 41'. Such a spiral loop coil will generate an annular magnetic field in the center of the coil 41', and the annular magnetic field will surround the annular magnetic conducting ring 31' to form an inductance as a whole. The disadvantage of this type of inductor is that it must be wound by hand to make a spiral coil, or a machine with a complex structure is used. However, the spiral ring wound by this type of machine has a considerable size and is not suitable for making small-volume spiral rings. . If it is manufactured manually, it is time-consuming and cost-consuming on the one hand. Moreover, the traditional spiral loop inductor is prone to wear and tear on the wires of the coil during the manufacturing process, thus destroying the overall insulation.

As shown in FIG. 6, another structure for forming an inductor in the prior art mainly includes a frame body 10', which includes an outer frame 20' made of a magnetically permeable material and at least one support 30' made of a magnetically permeable material. Made of magnetically conductive material, one end of the support 30' is located on one side of the outer frame 20', and the other end of the support 30' is located at the other side of the outer frame 20'; wherein the outer frame 20' and the The frame body 10 ′ formed by at least one pillar 30 ′ forms a closed loop, so that the magnetic field can pass through the frame body 10 ′ to form a closed loop through a point. At least one coil 40', each coil 40' surrounds the corresponding column 30' in the at least one column 30', wherein both ends of the coil 40' extend out of the outer frame 20' of the frame body 10', using to guide the current in and out. When the coil 40' is energized, a magnetic field will be formed inside the coil 40', and the magnetic field lines of the magnetic field extend outward from one opening of the coil and then enter another opening of the coil 40' to form a closed loop. However, the disadvantage of this structure is that it lacks an effective heat conduction mechanism. The heat generated when the coil is energized will accumulate inside the frame body and cannot be conducted outwards, resulting in an increase in the coil temperature. When the wire temperature is higher, it will decrease. The current amount of current, which reduces the inductance value. Therefore, the inductance is not rated inductance, and the whole circuit cannot achieve the expected effect.

Therefore, the present invention hopes to provide a new electromagnetic element with a heat-conducting structure and a coil to solve the above-mentioned defects in the prior art.

SUMMARY OF THE INVENTION

The purpose of the present invention is to solve the above-mentioned problems in the prior art. The present invention proposes an electromagnetic element with a heat-conducting structure and a coil. The inner space of the frame body is filled with heat-conducting glue, so that the heat generated by the coil passes through the heat-conducting glue. It is effectively transmitted to the frame body, and since the frame body has a large area, it can effectively dissipate heat. Therefore, the present invention can effectively remove the heat generated by the wire, because the higher the wire temperature is, the lower the amount of current and the lower the inductance value. Therefore, the inductance is not rated inductance, so that the entire circuit cannot achieve the expected effect. In the present invention, the heat of the coil is effectively removed, and the inductance of the coil can be maintained at the rated value, so the characteristics of the entire circuit can be maintained without heat. be affected by accumulation. At the same time, compared with the inductance in the form of a spiral ring, the manufacturing method of the present invention is simpler, so that the cost can be saved. And the manufacturing process does not destroy the insulation of the wires in the coil. The coil in the present invention can have various wire types, such as flat wire, self-adhesive stranded wire or self-adhesive single core wire.

In order to achieve the above purpose, the present invention proposes an electromagnetic component with a heat-conducting structure and a coil, which includes a frame body, which includes an outer frame and at least one pillar; the outer frame is made of a magnetically conductive material; wherein the outer frame includes At least one opening, wherein the inner space of the outer frame is a closed space formed by each wall surface inside the outer frame and the minimum area cross-section of the at least one opening; at least one pillar, one end of the pillar is located on one side of the outer frame, The other end of the support is located on the other side of the outer frame; wherein the support is made of magnetically permeable material; wherein the frame body formed by the outer frame and the at least one support forms a closed loop, so that the magnetic field A closed loop can be wound through the frame body from one point; at least one coil, each coil surrounds the corresponding column in the at least one column, wherein both ends of the coil extend out of the inner space of the outer frame of the frame body, Used to guide the current in and out; an adhesive area is located in the inner space of the outer frame of the frame body, wherein the adhesive area is formed by thermally conductive adhesive, and is located between the coil and the pillars covered by the coil between the coil and the corresponding inner side of the peripheral frame body.

Further, the volume ratio of the adhesive area exceeds 30% of the inner space of the outer frame of the frame body.

Further, the thermal conductivity of the thermally conductive adhesive constituting the adhesive zone is greater than 0.3λ (W/m·K).

Further, the at least one pillar is a single pillar, and the coil is wound on the pillar to form an inductance.

Further, the at least one pillar is two pillars, one end of each pillar is located on one side of the outer frame, and the other end of each pillar is located on the other side of the outer frame; wherein the at least one coil is two coils, each The coils surround corresponding ones of the two legs to form a transformer.

Further, the outer frame has two openings, and the inner space is a closed space formed by each wall surface inside the outer frame and the minimum-area section of the two openings.

Further, the wire type of the coil is selected from flat wire, self-adhesive stranded wire or self-adhesive single core wire.

Description of drawings

FIG. 1 is a schematic diagram of the component combination of the present invention.

FIG. 2 is a schematic diagram of the frame body of the present invention.

FIG. 3 is a schematic diagram of a component combination according to another embodiment of the present invention.

FIG. 4 is a schematic diagram of the frame body of FIG. 3 .

FIG. 5 is a schematic cross-sectional view of an inductor structure in the prior art.

FIG. 6 is another inductor structure in the prior art.

Description of reference numerals

10 frame body

10' frame body

11 inside edge

12 inside edge

13 inside edge

14 inside edge

20 frame

20' frame

21 openings

25 interior space

30 pillars

30' Pillar

31' magnetic ring

40 coils

40' coil

41 openings

41' coil

42 openings

50 Adhesive Zones

51 thermal adhesive

100 closed loops.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Many specific details are set forth in the following description to facilitate a full understanding of the present invention, but the present invention can also be implemented in other ways different from those described herein, and those skilled in the art can do so without departing from the connotation of the present invention. Similar promotion, therefore, the present invention is not limited by the specific embodiments disclosed below.

Please refer to FIG. 1 to FIG. 4 , which are electromagnetic components with a heat-conducting structure and a coil of the present invention, including the following components:

A frame body 10, comprising: an outer frame and at least one pillar;

An outer frame 20; the outer frame 20 is made of magnetically conductive material. The outer frame 20 includes at least one opening 21 , and the inner space 25 of the outer frame 20 is a closed space formed by the walls of the outer frame 20 and the minimum area section of the at least one opening 21 . In FIG. 2 , the outer frame 20 has two openings 21 , so the inner space 25 is defined by the walls A, B, C, D inside the outer frame 20 and the minimum area cross-sections E and F of the two openings 21 . Formed closed space.

At least one pillar 30, one end of the pillar 30 is located on one side of the outer frame 20, and the other end of the pillar 30 is located on the other side of the outer frame 20; wherein the pillar 30 is made of a magnetically permeable material.

The frame body 10 formed by the outer frame 20 and the at least one support column 30 forms a closed loop, so that the magnetic field can pass through the frame body 10 from a point to form a closed loop.

At least one coil 40, each coil 40 surrounds the corresponding column 30 in the at least one column 30, wherein both ends of the coil 40 extend out of the inner space 25 of the outer frame 20 of the frame body 10 for guiding. Inflow and outflow of current. The coil 40 is made of conductive metal such as copper or aluminum. The wire types of the coil 40 can be various types, such as flat wire, self-adhesive stranded wire or self-adhesive single core wire.

According to the electromagnetic theory, when the coil 40 is energized, a magnetic field will be formed inside the coil 40 , and the magnetic field lines of the magnetic field extend outward from an opening 41 of the coil 40 and then enter another opening 42 of the coil 40 to form a closed loop 100. In the present invention, because the coil 40 surrounds the periphery of the corresponding pillar 30 , most of the magnetic lines of force will be distributed along the frame body 10 to form a closed loop 100 passing through the coil 40 as shown in the figure.

An adhesive area 50 is located in the inner space 25 of the outer frame 20 of the frame body 10 , wherein the adhesive area 50 is formed by the thermally conductive adhesive 51 , and is located between the coil 40 and the pillars covered by the coil 40 . 30 , and also between the coil 40 and the corresponding inner sides 11 and 12 of the frame body 10 in the periphery. In FIG. 1 , the inner sides 11 and 12 correspond to the inner left side of the frame body 10 respectively. and inner right. The volume ratio of the adhesive area 50 exceeds 30% of the inner space 25 of the outer frame 20 of the frame body 10 , and the thermal conductivity of the thermally conductive adhesive 51 constituting the adhesive area 50 is greater than 0.3λ(W/m ·K, W stands for watts, m stands for meters, K stands for Kelvin temperature).

In the embodiment of FIG. 1 , a single pillar 30 is used as an embodiment, and the structure of the single pillar 30 is suitable for an inductor.

Another embodiment of the present invention is described below, which is an embodiment of a double strut 30, including the following elements:

A frame body 10, including: an outer frame and two pillars;

An outer frame 20, the outer frame 20 is made of a magnetically conductive material. The outer frame 20 includes at least one opening 21 , and the inner space 25 of the outer frame 20 is a closed space formed by the walls of the outer frame 20 and the minimum area section of the at least one opening 21 . In FIG. 4 , there are two openings 21 , so the inner space 25 is a closed space formed by the walls A, B, C, D inside the outer frame 20 and the minimum area cross-sections E and F of the two openings 21 .

Two pillars 30, one end of each pillar 30 is located on one side of the outer frame 20, and the other end of each pillar 30 is located on the other side of the outer frame 20; wherein each pillar 30 is made of a magnetically permeable material.

The frame body 10 formed by the outer frame 20 and the two pillars 30 forms a closed loop, so that the magnetic field can pass through the frame body 10 from one point to form a closed loop.

Two coils 40 , each coil 40 surrounds the corresponding column 30 of the two columns 30 , wherein both ends of the coil 40 extend out of the inner space 25 of the outer frame 20 of the frame body 10 for guiding. Inflow and outflow of current.

According to electromagnetic theory, when each coil 40 is energized, a magnetic field will be formed inside each coil 40 , and the magnetic field lines of the magnetic field extend outward from an opening 41 of each coil 40 and then enter another opening 42 of the coil 40 to form a closed loop 100. In the present invention, because each coil 40 surrounds the periphery of the corresponding pillar 30 , most of the magnetic field lines are distributed along the frame body 10 , forming a closed loop 100 passing through each coil 40 as shown in the figure.

An adhesive area 50 is located in the inner space 25 of the outer frame 20 of the frame body 10 , wherein the adhesive area 50 is formed by the thermally conductive adhesive 51 and is located between the coils 40 and the pillars 30 covered by them. between each coil 40 and the corresponding inner sides 11 , 12 , 13 , 14 of the frame body 10 , in FIG. 3 , the inner sides 11 , 12 , 13 , 14 correspond to the frame respectively The inner left side, the inner right side, the inner upper side and the inner side lower side of the body 10 . The volume ratio of the adhesive area 50 exceeds 30% of the inner space 25 of the outer frame 20 of the frame body 10 , and the thermal conductivity of the thermally conductive adhesive 51 constituting the adhesive area 50 is greater than 0.3λ(W/m ·K, W stands for watts, m stands for meters, K stands for Kelvin temperature).

The above-mentioned double-column 30 structure is suitable for a transformer. When the coils 40 are energized, the magnetic field lines of the coils 40 will form a closed loop along the frame body 10 , and the mutual inductance of the two coils 40 will cause the voltage changes on the primary side and the secondary side.

In the present invention, the inner space of the frame body is filled with thermally conductive glue, so that the heat generated by the coil can be effectively transferred to the frame body through the thermally conductive glue. Since the frame body has a large area, it can effectively dissipate heat. Therefore, the present invention can effectively remove the heat generated by the wire, because the higher the wire temperature is, the lower the amount of current and the lower the inductance value. Therefore, the inductance is not rated inductance, so that the entire circuit cannot achieve the expected effect. In the present invention, the heat of the coil is effectively removed, and the inductance of the coil can be maintained at the rated value, so the characteristics of the entire circuit can be maintained without heat. be affected by accumulation. In addition, compared with the inductance in the form of a spiral ring, the manufacturing method of the present invention is simpler, and thus the cost can be saved. And the manufacturing process does not destroy the insulation of the wires in the coil. The coil in the present invention can have various wire types, such as flat wire, self-adhesive stranded wire, or self-adhesive single core wire.

Obviously, the described embodiments are only some, but not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

Claims (7)

1. An electromagnetic element with a thermally conductive structure and a coil, characterized in that, comprising: a frame body, including: an outer frame and at least one pillar; an outer frame, the outer frame is made of a magnetically permeable material; wherein the outer frame includes at least one opening, wherein the inner space of the outer frame is formed by each wall surface inside the outer frame and the minimum area section of the at least one opening closed space; at least one pillar, one end of the pillar is located on one side of the outer frame, and the other end of the pillar is located on the other side of the outer frame; wherein the pillar is made of a magnetically permeable material; Wherein the frame body formed by the outer frame and the at least one pillar forms a closed loop, so that the magnetic field can be wound into a closed loop by passing through the frame body at a point; at least one coil, each coil surrounds a corresponding support column in the at least one support column, wherein both ends of the coil extend out of the inner space of the outer frame of the frame body for guiding the in and out of the current; An adhesive area is located in the inner space of the outer frame of the frame body, wherein the adhesive area is formed by thermally conductive adhesive, and is located between the coil and the pillar covered by the coil, and also between the coil between the coil and the corresponding inner side of the frame body on the periphery. 2 . The electromagnetic device with a heat-conducting structure and a coil as claimed in claim 1 , wherein the volume ratio of the adhesive area exceeds 30% of the inner space of the outer frame of the frame body. 3 . 3 . The electromagnetic component with a thermally conductive structure and a coil as claimed in claim 1 , wherein the thermal conductivity of the thermally conductive adhesive constituting the adhesive region is greater than 0.3λW/m·K. 4 . 4 . The electromagnetic device of claim 1 , wherein the at least one post is a single post, and the coil is wound on the post to form an inductance. 5 . 5 . The electromagnetic device having a heat-conducting structure and a coil as claimed in claim 1 , wherein the at least one support column is two support columns, one end of each support column is located on one side of the outer frame, and the other end of each support column is located at one side of the outer frame. 6 . The other side of the outer frame; wherein the at least one coil is two coils, and each coil surrounds a corresponding one of the two legs to form a transformer. 6 . The electromagnetic device with a heat-conducting structure and a coil as claimed in claim 1 , wherein the outer frame has two openings, and the inner space is each wall surface inside the outer frame and the minimum area cross-section of the two openings. 7 . The enclosed space formed. 7 . The electromagnetic device having a heat-conducting structure and a coil as claimed in claim 1 , wherein the wire type of the coil is selected from flat wire, self-adhesive stranded wire or self-adhesive single-core wire. 8 .

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