Four-phase common-mode filter inductor

Abstract

The utility model discloses a four-phase common-mode filter inductor, which relates to the technical field of inductors, and comprises a seat body, a magnetic core and four winding coils, the magnetic core is fixedly arranged above the seat body, the magnetic core is of a square structure, a limiting groove is reserved on each side of the magnetic core, the number of the winding coils is four, and the number of the winding coils is four. And the winding coils are fixedly wound outside the limiting grooves, the middles of the corresponding edges of the magnetic core are all sunken inwards due to the arrangement of the limiting grooves, and the wound winding coils are restrained through the limiting grooves. According to the four-phase common-mode filter inductor, the magnetic core is designed to be of the square structure, the inwards-sunken limiting grooves are reserved in the positions, corresponding to the winding coils of the multiple turns, of the edges of the square magnetic core, the winding coils of the multiple turns are wound in the limiting grooves, and after the winding coils of the multiple turns are restrained by the limiting grooves, the winding coils of the multiple turns are wound in the limiting grooves. No gap exists between the adjacent turns of the winding coil, namely, the problem that the winding coil is loosened after being wound does not exist.

Description

Technical Field

[0001] The utility model relates to the technical field of inductance, in particular to a four-phase common-mode filtering inductor. Background Art

[0002] Inductance is a property of a closed loop and a physical quantity. When current passes through a coil, a magnetic field is induced in the coil, and the induced magnetic field generates an induced current to resist the current passing through the coil.

[0003] At present, the surface of the magnetic core of the four-phase common-mode filter inductor in the prior art is a relatively smooth plane. After winding several turns of the winding coil, there is a certain gap between adjacent turns of the winding coil, which makes the winding coil relatively loose after winding. For this reason, we propose a four-phase common-mode filter inductor that can effectively prevent the winding coil from loosening after winding. Utility Model Content

[0004] In view of the deficiencies in the prior art, the utility model provides a four-phase common-mode filtering inductor, which solves the problems raised by the above-mentioned background technology.

[0005] To achieve the above objectives, the utility model is implemented through the following technical solutions: a four-phase common-mode filter inductor, comprising:

[0006] seat body;

[0007] A magnetic core, which is fixedly arranged above the seat body, and is a square structure with a limit groove reserved on each side;

[0008] A winding coil, wherein a plurality of winding coils are provided, and each winding coil is fixedly wound on the outside of the limiting groove.

[0009] Furthermore, a plurality of groups of reserved holes are provided inside the seat body.

[0010] Furthermore, the limiting grooves are arranged so that the middle parts of the corresponding sides of the magnetic core are all recessed inwards, and the winding coils after winding are constrained by the limiting grooves.

[0011] Furthermore, after the winding coil is wound around the outside of the magnetic core, it has two positive pins and a negative pin extending toward the seat body.

[0012] Furthermore, the positive electrode pins and the negative electrode pins pass through the corresponding reserved holes in each group when extended, and protrude from the lower surface of the base body.

[0013] Furthermore, the positive electrode pin and the negative electrode pin are bonded and fixed to the reserved hole by insulating glue.

[0014] The utility model provides a four-phase common-mode filter inductor. Compared with the prior art, it has the following beneficial effects:

[0015] The four-phase common-mode filter inductor is designed to have a square structure by designing a magnetic core, and an inwardly recessed limiting groove is reserved on each side of the square magnetic core corresponding to the position where a plurality of turns of winding coils are wound, and the plurality of turns of winding coils are wound inside the limiting groove. With the limiting groove constraining the plurality of turns of winding coils, there is no gap between adjacent turns of the winding coils, that is, there is no problem of the winding coils being loose after being wound. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the disassembly of the utility model;

[0017] Figure 2 It is a schematic diagram of the assembly of the utility model;

[0018] Figure 3 This is a top view of the utility model after assembly;

[0019] Figure 4 It is a three-dimensional diagram of the winding coil in the utility model;

[0020] Figure 5 For this utility model Figure 3 Sectional view of AA.

[0021] In the figure: 1, seat body; 101, reserved hole; 2, magnetic core; 201, limiting groove; 3, winding coil; 301, positive pin; 302, negative pin. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] See also Figure 1-5The utility model provides a technical solution: a four-phase common-mode filter inductor, comprising a base 1, a magnetic core 2 and a winding coil 3, wherein: the base 1 is a component of an insulating material, and four groups of reserved holes 101 are opened inside the base 1, each group includes two reserved holes 101, the magnetic core 2 is fixedly arranged above the base 1, the magnetic core 2 is a square structure, and a limiting groove 201 is reserved on each side, the limiting groove 201 and the magnetic core 2 are an integrally formed structure, which can be formed by a mold, and the winding coil 3 is provided with four, and the winding coil 3 is fixedly wound on the outside of the limiting groove 201, and the setting of the limiting groove 201 makes the middle part of the corresponding side of the magnetic core 2 concave inward, and the winding after winding is controlled by the limiting groove 201 The coil 3 is constrained so that each turn of the winding coil 3 after winding is very tight and will not be loose. After the winding coil 3 is wound on the outside of the magnetic core 2, it has two positive pins 301 and negative pins 302 extending toward the base body 1. The positive pins 301 and the negative pins 302 pass through the corresponding reserved holes 101 in each group when extending, and protrude from the lower surface of the base body 1, so that the entire inductor is welded and fixed on the PCB board. The positive pins 301 and the negative pins 302 are bonded and fixed to the reserved holes 101 by glue. This glue is preferably insulating glue. The glue is used as a fixing medium between the positive pins 301, the negative pins 302 and the base body 1, thereby giving the magnetic core 2 and the winding coil 3 an upward supporting force.

[0024] When assembling the four-phase common-mode filter inductor, first fix the magnetic core 2 with the limiting slot 201 on the processing position of the winding equipment, and then use the winding equipment to wind several turns of the winding coil 3 on the outside of the limiting slot 201. After winding, the two ends of the winding coil 3 are still located in the limiting slot 201 to ensure that there is no gap between adjacent turns of the winding coil 3 after winding, and it is not loose. Then, insert the positive pin 301 and the negative pin 302 of the winding coil 3 into the reserved hole 101 on the base body 1, and then apply glue to the contact parts of the positive pin 301 and the negative pin 302 with the reserved hole 101.

Claims

1. A four-phase common-mode filter inductor, characterized in that: include: base(1); A magnetic core (2), the magnetic core (2) being fixedly arranged above the seat body (1), the magnetic core (2) being a square structure, with a limiting groove (201) reserved on each side; A winding coil (3), wherein a plurality of winding coils (3) are provided, and each winding coil (3) is fixedly wound on the outside of the limiting groove (201).

2. A four-phase common-mode filter inductor according to claim 1, characterized in that: A plurality of groups of reserved holes (101) are provided inside the seat body (1).

3. The four-phase common-mode filter inductor according to claim 1, characterized in that: The arrangement of the limiting grooves (201) causes the middle parts of the corresponding sides of the magnetic core (2) to be recessed inwards, and the wound winding coil (3) is constrained by the limiting grooves (201).

4. The four-phase common-mode filter inductor according to claim 1, characterized in that: After being wound around the outside of the magnetic core (2), the winding coil (3) has two positive pins (301) and a negative pin (302) extending toward the base body (1).

5. A four-phase common-mode filtering inductor according to claim 4, characterized in that: When extended, the positive electrode pin (301) and the negative electrode pin (302) pass through the corresponding reserved holes (101) in each group and protrude from the lower surface of the base body (1).

6. A four-phase common-mode filtering inductor according to claim 5, characterized in that: The positive electrode pin (301) and the negative electrode pin (302) are bonded and fixed to the reserved hole (101) by glue.

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