CN217086330U - Flat common mode inductor - Google Patents

Abstract

The utility model particularly discloses a flat common mode inductor, which comprises an upper magnet, a lower magnet, a first flat coil, a second flat coil and an insulating clapboard, wherein the upper magnet is provided with a first magnetic core; the lower magnet and the upper magnet are separable from each other, the lower magnet having a second magnetic core; the first flat coil is wound on the first magnetic core and provided with a first pin; the second flat coil is wound on the second magnetic core and provided with a second pin; insulating barrier sets up between first flat coil and the flat coil of second, and insulating barrier all installs on first magnetic core and second magnetic core through limit structure. Because the insulating partition plate is installed on the first magnetic core and the second magnetic core through the limiting structure, the insulating partition plate can be limited and fixed together with the first magnetic core and the second magnetic core, so that the installation position of the insulating partition plate is more accurate and firm, and the use reliability of the whole flat common-mode inductor is improved.

Description

Flat common mode inductor

Technical Field

The utility model relates to an inductance technical field, concretely relates to flat common mode inductance.

Background

The common mode inductor is a common mode interference suppression device which takes ferrite as a magnetic core, two coils with the same size and the same number of turns are symmetrically wound on the same ferrite annular magnetic core to form a four-end device, the principle is that magnetic fluxes are mutually superposed when common mode current flows, so that the common mode inductor has a considerable inductance and plays a role in suppressing the common mode current, and when two coils flow differential mode current, the magnetic fluxes are mutually counteracted, almost no inductance exists, so the differential mode current can pass through without attenuation. Therefore, the common-mode inductor can effectively suppress common-mode interference signals in the balanced line, and differential-mode signals normally transmitted by the line are not influenced.

Because the baffle in the common mode inductance is located between two coils, under the prior art, the mounted position of baffle is unstable, and the not hard up of baffle can influence two coils of winding setting on the magnet, leads to the problem that whole common mode inductance uses the poor reliability.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem that a flat common mode inductance is provided, solve the unstable problem of prior art median septum mounted position.

A flat common mode inductor comprises an upper magnet, a lower magnet, a first flat coil, a second flat coil and an insulating partition plate, wherein the upper magnet is provided with a first magnetic core; the lower magnet and the upper magnet are separable from each other, and the lower magnet has a second magnetic core; the first flat coil is wound on the first magnetic core and provided with a first pin; the second flat coil is wound on the second magnetic core and provided with a second pin; the insulating partition plate is arranged between the first flat coil and the second flat coil and is arranged on the first magnetic core and the second magnetic core through a limiting structure; the middle part of the insulating partition plate is provided with an installation groove, and the insulating partition plate is installed on the first magnetic core and the second magnetic core through the installation groove; the limiting structure comprises a limiting buckle and a limiting clamping groove matched with the limiting buckle, the limiting buckle is arranged on the first magnetic core and the second magnetic core, and the limiting clamping groove is arranged on the inner side wall of the mounting groove.

Further, the insulating partition board is an FR4 high-temperature-resistant epoxy insulating partition board.

Further, last magnet, lower magnet are injectd by first lateral wall, second lateral wall and diapire and are formed, first magnetic core, second magnetic core set up in on the diapire, first magnetic core with the diapire of going up the magnet is the integrated into one piece structure, the second magnetic core with the diapire of lower magnet is the integrated into one piece structure.

Further, the inner surfaces of the first side wall and the second side wall are both arc surfaces which are recessed outwards.

Further, the first flat coil and the second flat coil are both enameled flat coils.

Furthermore, an insulating bottom plate is arranged at the lower end of the lower magnet, a first open groove and a second open groove are respectively formed in two sides of the insulating bottom plate, the first open groove is used for allowing the first pin to extend into the first open groove, and the second open groove is used for allowing the second pin to extend into the second open groove.

Furthermore, two elastically telescopic positioning blocks are arranged on the inner side walls of the first slot and the second slot, and the two positioning blocks are symmetrically arranged.

Furthermore, the insulating bottom plate is a high-temperature-resistant epoxy bottom plate.

Compared with the prior art, the beneficial effects of the utility model are that: because the insulating partition plate is installed on the first magnetic core and the second magnetic core through the limiting structure, the insulating partition plate can be limited and fixed together with the first magnetic core and the second magnetic core, so that the installation position of the insulating partition plate is more accurate and firm, and the use reliability of the whole flat common-mode inductor is improved.

Drawings

Fig. 1 is a schematic view of an overall structure of a flat common mode inductor according to an embodiment of the present application.

Fig. 2 is an exploded view of a flat common mode inductor according to an embodiment of the present application.

Fig. 3 is a schematic structural diagram of a lower magnet and an insulating spacer according to an embodiment of the present application.

Fig. 4 is a schematic structural diagram of an insulating base plate according to an embodiment of the present application.

Description of reference numerals: 1. an upper magnet; 2. a lower magnet; 3. a first pancake coil; 4. a second pancake coil; 5. an insulating spacer; 6. a first magnetic core; 7. a second magnetic core; 8. a first pin; 9. a second pin; 10. a first side wall; 11. a second side wall; 12. a bottom wall; 13. a limiting buckle; 20. an insulating base plate; 21. a first slot; 22. a second slot; 23. positioning blocks; 50. and (4) mounting the groove.

Detailed Description

The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic drawings and illustrate the basic structure of the present invention only in a schematic manner, and thus show only the components related to the present invention.

In the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention; the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance; furthermore, unless expressly stated or limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, as they may be fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Example 1

Referring to fig. 1 to 4, a flat common mode inductor includes an upper magnet 1, a lower magnet 2 separable from the upper magnet 1, a first flat coil 3, a second flat coil 4, and an insulating spacer 5 disposed between the first flat coil 3 and the second flat coil 4, wherein the upper magnet 1 has a first magnetic core 6; the lower magnet 2 has a second magnetic core 7; the first flat coil 3 is wound on the first magnetic core 6, and the first flat coil 3 is provided with a first pin 8; the second flat coil 4 is wound on the second magnetic core 7, and the second flat coil 4 is provided with a second pin 9; insulating barrier 5 all installs on first magnetic core 6 and second magnetic core 7 through limit structure.

The embodiment of the utility model provides a flat common mode inductance is through winding flat line on the magnet in order to form common mode inductance for the shared volume of coil that flat line formed reduces relatively, and it reduces to heat up, does benefit to the heat dissipation simultaneously, thereby has solved common mode inductance among the prior art because the problem that the volume that uses round copper line to cause is big, the radiating effect is not good and product life is short, has realized reducing the volume, has optimized the radiating effect and has improved the effect in its life-span.

Since the upper magnet 1 and the lower magnet 2 can be separated from each other, when the flat coil of one of the upper magnet 1 or the lower magnet 2 is damaged, the upper magnet 1 and the lower magnet 2 can be separated from each other, and the new upper magnet 1 or the new lower magnet 2 can be replaced. The magnet in the existing flat common mode inductor is usually of an integrally formed structure, and then two flat coils are respectively wound on two sides of the magnet, so that the whole flat common mode inductor can be scrapped as long as one of the flat coils has a problem. In addition, because the insulating partition plate 5 is installed on the first magnetic core 6 and the second magnetic core 7 through the limiting structure, the insulating partition plate 5 can be limited to be fixed with the first magnetic core 6 and the second magnetic core 7, so that the installation position of the insulating partition plate 5 is more accurate and firm, and the use reliability of the whole flat common mode inductor is improved.

For example, the upper magnet 1 and the lower magnet 2 are both defined by the first side wall 10, the second side wall 11 and the bottom wall 12, and the inner surfaces of the first side wall 10 and the second side wall 11 are both arc surfaces which are recessed outwards, so that a certain gap is formed between the flat coil and the two side walls, and the heat dissipation efficiency of the first flat coil 3 and the second flat coil 4 is improved. First magnetic core 6, second magnetic core 7 set up on the diapire, and first magnetic core 6 is the integrated into one piece structure with the diapire of last magnet 1, and second magnetic core 7 is the integrated into one piece structure with the diapire of lower magnet 2. By adopting the structure, the strength of the first magnetic core 6 and the second magnetic core 7 can be ensured, and the first magnetic core 6 and the second magnetic core 7 can not be damaged when the coil is wound.

The first flat coil 3 and the second flat coil 4 are enameled flat coils, the problems of poor heat dissipation of round enameled wires, large coil volume, low power and the like are solved, and the enameled flat coil has the advantages that each wire can dissipate heat, the product volume is small, the power is high and the like.

Specifically, the insulating partition 5 is an FR4 high temperature resistant epoxy insulating partition, the middle of the insulating partition 5 is provided with a mounting groove 50, and the insulating partition 5 is mounted on the first magnetic core 6 and the second magnetic core 7 through the mounting groove 50. Spacing structure includes spacing buckle 13 and the spacing draw-in groove that matches with spacing buckle 13, and first magnetic core 6 and second magnetic core 7 all are provided with spacing buckle 13, and the quantity of spacing buckle 13 on first magnetic core 6 and the second magnetic core 7 is two, and two spacing buckle 13 symmetries set up, are provided with the spacing draw-in groove that corresponds with spacing buckle 13 on the 50 inside walls of mounting groove of insulating barrier 5. During the installation, earlier locate first magnetic core 6 and second magnetic core 7 with insulating barrier 5 cover on, spacing buckle 13 block is connected in spacing draw-in groove simultaneously, has realized insulating barrier 5 and first magnetic core 6, the firm of second magnetic core 7 is connected.

Optionally, an insulating bottom plate 20 is disposed at the lower end of the lower magnet 2, the insulating bottom plate 20 is a high temperature resistant epoxy bottom plate, a first slot 21 and a second slot 22 are disposed on two sides of the insulating bottom plate 20, the first slot 21 is used for the first pin 8 to extend into, and the second slot 22 is used for the second pin 9 to extend into. Furthermore, two elastically telescopic positioning blocks 23 are arranged on the inner side walls of the first slot 21 and the second slot 22, and the two positioning blocks 23 are symmetrically arranged. Through setting up two elastically flexible locating pieces 23, when installation first pin 8 and second pin 9, locating piece 23 can be fixed a position first pin 8 and second pin 9, because locating piece 23 has the elastically flexible nature, can be adapted to the pin of not unidimensional to insulating bottom plate 20's commonality has been improved.

In the description herein, references to the description of the terms "one embodiment," "certain embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The basic principles and the main features of the invention and the advantages of the invention have been shown and described above, it will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, but that the invention may be embodied in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.

Claims (8)

1. A flat common mode inductor, comprising:

an upper magnet having a first magnetic core;

a lower magnet, the lower magnet and the upper magnet being separable from each other, the lower magnet having a second magnetic core;

the first flat coil is wound on the first magnetic core and provided with a first pin;

the second flat coil is wound on the second magnetic core and provided with a second pin;

the insulating partition plate is arranged between the first flat coil and the second flat coil and is arranged on the first magnetic core and the second magnetic core through a limiting structure;

the middle part of the insulating partition plate is provided with a mounting groove, and the insulating partition plate is mounted on the first magnetic core and the second magnetic core through the mounting groove; the limiting structure comprises a limiting buckle and a limiting clamping groove matched with the limiting buckle, the limiting buckle is arranged on the first magnetic core and the second magnetic core, and the limiting clamping groove is arranged on the inner side wall of the mounting groove.

2. The flat common-mode inductor as claimed in claim 1, wherein the insulating spacer is FR4 high temperature epoxy insulating spacer.

3. A flat common-mode inductor according to claim 1, wherein each of the upper and lower magnets is defined by a first side wall, a second side wall and a bottom wall, the first and second magnetic cores are disposed on the bottom wall, the first magnetic core is integrally formed with the bottom wall of the upper magnet, and the second magnetic core is integrally formed with the bottom wall of the lower magnet.

4. A flat common-mode inductor according to claim 3, characterized in that the inner surfaces of the first and second side walls are both arc surfaces which are concave outwards.

5. The flat common mode inductor according to claim 1, wherein the first flat coil and the second flat coil are both enameled flat coils.

6. The flat common-mode inductor as claimed in claim 1, wherein an insulating bottom plate is disposed at a lower end of the lower magnet, a first slot and a second slot are disposed at two sides of the insulating bottom plate, respectively, the first slot is used for the first pin to extend into, and the second slot is used for the second pin to extend into.

7. The flat common-mode inductor as claimed in claim 6, wherein two elastically stretchable positioning blocks are disposed on the inner sidewalls of the first slot and the second slot, and the two positioning blocks are symmetrically disposed.

8. The flat common-mode inductor according to claim 6, wherein the insulating substrate is a high temperature epoxy substrate.

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