CN209895864U

CN209895864U - Mouth-shaped iron-silicon-aluminum common mode inductor

Info

Publication number: CN209895864U
Application number: CN201921031108.1U
Authority: CN
Inventors: 谢龙
Original assignee: Lantian Xiangda Electronics Co Ltd
Current assignee: Lantian Xiangda Electronics Co Ltd
Priority date: 2019-07-04
Filing date: 2019-07-04
Publication date: 2020-01-03
Anticipated expiration: 2029-07-04

Abstract

The utility model discloses a square-shaped sendust common mode inductor, which comprises a magnet, a first coil, a second coil and a mounting rack, wherein the magnet adopts sendust and is in a square-shaped closed loop structure, two vertical symmetrical edges are cylinders, and two horizontal symmetrical edges are rectangular columns; first coil with the second coil twines respectively two of vertical symmetry on the cylinder, the utility model discloses a sendust magnet, its hysteresis coefficient is low, and magnetic induction is high, and the magnetic loss is lower than the ferrite, and edge loss can not take place, and direct current adds sexuality well, can pass through the heavy current, its magnetic flux is more than 2 times of ferrite, therefore the magnet size can reduce about 35% than the ferrite, satisfy miniaturized requirement, and the magnetic flux keeps invariable when temperature variation, and life is longer, the magnet is the style of calligraphy in the mouth in addition, can adopt automatic coil winding machine to wind, the window utilization ratio of magnet has been improved, automatic production has been realized, the cost of labor has been saved, production efficiency has been improved.

Description

Mouth-shaped iron-silicon-aluminum common mode inductor

Technical Field

The utility model relates to an inductor technical field especially relates to a mouth style of calligraphy sendust common mode inductance.

Background

Common mode inductance, also called common mode choke, is commonly used in a switching power supply of a computer for filtering common mode electromagnetic interference signals, two coils are usually wound on the same iron core, the winding directions are opposite, and the number of turns and the phase are the same, so that when normal current in a circuit flows through the common mode inductance, the current generates reverse magnetic fields in the inductance coils wound in the same phase to offset each other, and at the moment, the normal signal current is mainly influenced by the resistance of the coils and a small amount of damping caused by leakage inductance; when a common mode current flows through the coil, due to the isotropy of the common mode current, an equidirectional magnetic field is generated in the coil to increase the inductive reactance of the coil, so that the coil presents high impedance and generates a strong damping effect, thereby attenuating the common mode current and achieving the purpose of filtering.

The magnet of traditional common mode inductance is the ring form, because the magnetic ring aperture is little, and the wire winding limit is the arc, and the unable threading of ordinary coiling machine can't realize automatic wire winding, needs the manual work to wind the line, wastes time and energy, and production efficiency is low. In addition, the common-mode inductance magnet usually adopts ferrite, however, the magnetic energy stored in unit volume of the ferrite is low, and the saturation magnetic induction intensity is also low, so that the inductor adopting the ferrite magnet usually has a large volume and is difficult to meet the size requirement of small electronic equipment, the ferrite has unstable performance in the environment with large temperature change and impact, the edge loss is large, and the service life is short, thereby limiting the application of the ferrite in the fields of low frequency strong electricity and high power which require high magnetic energy density.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a style of calligraphy sendust common mode inductance to solve the problem that provides among the above-mentioned background art.

In order to achieve the above purpose, the technical scheme of the utility model is as follows: the square-shaped sendust common mode inductor comprises a magnet, a first coil, a second coil and a mounting frame, wherein the magnet adopts sendust and is in a square-shaped closed loop structure, two vertical symmetrical edges are cylinders, and two horizontal symmetrical edges are rectangular columns; the first coil and the second coil are respectively wound on the two vertically symmetrical cylinders, the number of turns of the first coil is the same as that of the second coil, and the winding directions of the first coil and the second coil are opposite; the mounting bracket includes mounting panel and base, the mounting panel with the base is the L type perpendicularly, mounting panel both sides are equipped with the mounting groove along vertical direction, first coil the second coil is installed be located when on the mounting bracket in the mounting groove, the mounting panel middle part is equipped with the baffle along vertical direction will first coil with the second coil separates, the base bottom is equipped with four tin-plated stitch, on the base with the parallel both sides of mounting panel respectively are equipped with two recesses, the both ends of first coil with the both ends of second coil are passed through downwards respectively the recess respectively with correspond tin-plated stitch welded fastening.

Preferably, the first coil and the second coil are flat enameled wires.

Preferably, the first coil and the second coil are multi-layer flat winding.

Preferably, the mounting frame is made of bakelite.

Compared with the prior art, the beneficial effects of the utility model reside in that: the utility model discloses a sendust magnet, its hysteresis coefficient is low, and magnetic induction is high, and the magnetic loss is low than the ferrite, and can not take place the edge loss to direct current adds the nature well, can pass through the heavy current, and its magnetic flux is more than 2 times of ferrite, therefore the magnet size can reduce about 35% than the ferrite, satisfies miniaturized requirement, and the magnetic flux keeps invariable when the temperature variation, and life is longer. In addition, the Fe-Si-Al magnet is square, and an automatic winding machine can be adopted for winding, so that the window utilization rate of the magnet is improved, the automatic production is realized, the labor cost is saved, and the production efficiency is improved.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a front view of the present invention;

FIG. 2 is a schematic structural view of a square-shaped Fe-Si-Al magnet according to the present invention;

fig. 3 is a schematic structural diagram of the mounting rack of the present invention.

In the figure: 1. a magnet; 2. a first coil; 3. a second coil; 4. a mounting frame; 11. a cylinder; 12. a rectangular column; 41. mounting a plate; 42. a base; 43. mounting grooves; 44. a baffle plate; 45. tinning pins; 46. and (4) a groove.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In the description of the present invention, it is to be understood that the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

The first embodiment is as follows:

referring to fig. 1, a square sendust common mode inductor comprises a magnet 1, a first coil 2, a second coil 3 and a mounting frame 4, wherein the magnet 1 is made of sendust, compared with a traditional ferrite magnet, the magnet has the advantages of low hysteresis coefficient, high magnetic induction intensity, low magnetic loss compared with ferrite, no edge loss, good direct current superposition, and capability of passing large current, and the magnetic flux of the magnet is more than 2 times that of the ferrite, so that the size of the magnet can be reduced by about 35% compared with the ferrite, the requirement of miniaturization is met, the magnetic flux is kept constant when the temperature changes, and the service life is longer.

Referring to attached drawings 1 and 2, the magnet 1 is in a square closed loop structure, and can be wound by an automatic winding machine, so that the window utilization rate of the magnet is improved, automatic production is realized, the labor cost is saved, and the production efficiency is improved.

Referring to fig. 1 and 2, two vertical symmetrical sides of the magnet 1 are cylinders 11, and two horizontal symmetrical sides are rectangular columns 12; the first coil 2 and the second coil 3 are respectively wound on the two vertically symmetrical cylinders 11, and the first coil 2 and the second coil 3 have the same number of turns and are opposite in winding direction.

Referring to fig. 1 and 3, the mounting bracket 4 includes a mounting plate 41 and a base 42, the mounting plate 41 and the base 42 are perpendicular to each other and are L-shaped, two sides of the mounting plate 41 are provided with mounting grooves 43 along the vertical direction, the first coil 2 and the second coil 3 are mounted on the mounting bracket 41 and are located in the mounting grooves 43, a baffle 44 is arranged in the middle of the mounting plate 41 along the vertical direction, the first coil 2 and the second coil 3 are separated, the bottom of the base 42 is provided with four tinning pins 45, two parallel sides of the mounting plate 41 on the base 42 are respectively provided with two grooves 46, and two ends of the first coil 2 and two ends of the second coil 3 respectively pass through the grooves 46 respectively downwards and are welded and fixed with the corresponding tinning pins 45.

Referring to fig. 1, the first coil 2 and the second coil 3 are flat enameled wires.

Referring to fig. 1, the first coil 2 and the second coil 3 are wound in multiple layers.

Referring to fig. 1 and 3, the mounting frame 4 is made of bakelite, which has high insulation, high plasticity, high temperature resistance and corrosion resistance.

Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments or portions thereof without departing from the spirit and scope of the invention.

Claims

1. The square-shaped sendust common mode inductor comprises a magnet, a first coil, a second coil and a mounting frame, and is characterized in that the magnet adopts sendust and is in a square-shaped closed loop structure, two vertical symmetrical edges are cylinders, and two horizontal symmetrical edges are rectangular columns; the first coil and the second coil are respectively wound on the two vertically symmetrical cylinders, the number of turns of the first coil is the same as that of the second coil, and the winding directions of the first coil and the second coil are opposite; the mounting bracket includes mounting panel and base, the mounting panel with the base is the L type perpendicularly, mounting panel both sides are equipped with the mounting groove along vertical direction, first coil the second coil is installed be located when on the mounting bracket in the mounting groove, the mounting panel middle part is equipped with the baffle along vertical direction will first coil with the second coil separates, the base bottom is equipped with four tin-plated stitch, on the base with the parallel both sides of mounting panel respectively are equipped with two recesses, the both ends of first coil with the both ends of second coil are passed through downwards respectively the recess respectively with correspond tin-plated stitch welded fastening.

2. The sendust common mode inductor of claim 1, wherein the first coil and the second coil are flat enameled wires.

3. The sendust common mode inductor of claim 1, wherein the first coil and the second coil are wound in a multi-layer and layered manner.

4. The sendust common mode inductor of claim 1, wherein the mounting frame is made of bakelite.