CN220171897U

CN220171897U - Runway type heavy current common mode filter

Info

Publication number: CN220171897U
Application number: CN202321636864.3U
Authority: CN
Inventors: 王朱雯
Original assignee: Jiangsu Taichang Electronics Co ltd
Current assignee: Jiangsu Taichang Electronics Co ltd
Priority date: 2023-06-26
Filing date: 2023-06-26
Publication date: 2023-12-12
Anticipated expiration: 2033-06-26

Abstract

The utility model discloses a runway type heavy current common mode filter, which relates to the technical field of common mode filter inductance and comprises a magnetic core and windings, wherein the magnetic core is of a runway type structure and is made of nanocrystalline materials, the magnetic core is composed of a straight area and an arc area, the straight area forms the middle part of the magnetic core structure, the arc area forms two sides of the magnetic core structure, two windings are wound on the surface of the magnetic core, the two windings are both located in the straight area, and the arc area is not wired. The utility model provides a runway type heavy current common mode filter, the structure of a runway type common mode inductor belongs to compact design, space is effectively saved, power density is improved, a common mode inductor magnetic core adopts a magnetic ring design, the utilization rate of a magnetic ring middle hole is lower, the runway type common mode inductor flattens a round magnetic core into a shape similar to a runway, the middle hole of the magnetic core is compact, the utilization rate of space is improved, and the miniaturization of the whole size of a product is facilitated.

Description

Runway type heavy current common mode filter

Technical Field

The utility model relates to the technical field of common-mode filter inductors, in particular to a runway type high-current common-mode filter.

Background

The common mode filter inductor is mainly used for inhibiting common mode interference signals in a circuit and reducing mutual interference between a public power grid and electric equipment.

The traditional common mode filter inductance is mostly of a magnetic ring structure, the space in the middle of the magnetic ring is not fully utilized, the power density is reduced, and along with the smaller and smaller volume requirements of electronic products, the space waste is imperative to be reduced.

In view of the above, researches and improvements are made to solve the shortcomings of the conventional structure, and a racetrack type high-current common-mode filter is proposed.

Disclosure of Invention

The present utility model is directed to a racetrack type high-current common-mode filter, which solves the problems set forth in the background art.

In order to achieve the above purpose, the present utility model provides the following technical solutions: the utility model provides a runway formula heavy current common mode filter, includes magnetic core and winding, the magnetic core comprises straight region and circular arc region two parts, and straight region constitutes magnetic core structure middle part to circular arc region constitutes magnetic core structure both sides, the magnetic core surface winding has two windings, and two windings all are located straight region, and circular arc region does not route.

Furthermore, the magnetic core is of a runway-type structure, and is made of nanocrystalline materials.

Further, the ratio between the two windings is 1:1, and the windings adopt a clock winding structure.

Furthermore, a substrate is arranged at the bottom of the magnetic core, and the substrate is matched with the straight area to realize the overhead of the two windings.

Furthermore, a cross baffle is fixedly arranged at the middle end of the top of the substrate, and separates the two windings.

Furthermore, overhead seats are fixedly arranged on two sides of the top of the substrate, and the overhead seats are used for placing arc areas.

Furthermore, the two ends of the overhead seat at both sides are fixedly provided with bosses, pins are fixedly arranged on the outer sides of the bosses, and the pins are electrically connected with the winding leads.

Further, the inner sides of the bosses are fixedly provided with limiting arc plates, and elliptical mounting grooves are formed on the opposite sides of the limiting arc plates.

Compared with the prior art, the utility model has the following beneficial effects:

1. the track type common-mode inductor has the advantages that the track type common-mode inductor is compact in structure, space is effectively saved, power density is improved, a common-mode inductor magnetic core is designed by a magnetic ring, the utilization rate of a magnetic ring middle hole is low, the track type common-mode inductor flattens a round magnetic core into a track-like shape, the magnetic core middle hole is compact, the utilization rate of space is improved, and the miniaturization of the whole size of a product is facilitated;

2. the utility model adopts the clock winding structure to carry out threading in the straight area in the middle of the magnetic core, the circular arc area does not carry out threading, when the magnetic core with the threading is assembled with the base plate under the guidance of the limiting arc plate, the cross baffle plate fixed in the middle of the base plate isolates the two windings, then the two sides of the cross baffle plate are overhead and the base plate is higher than the plane height of the base plate at the middle, so the straight area part with threading is overhead, the circular arc area without threading is put on the overhead base, the threading area does not affect the assembly of the magnetic core and the base, and the winding leads can be hung at the end parts of the pins, thus, the track type common-mode inductor can be arranged on the PCB board in a sinking way, the height of the product on the PCB board is lower, the whole ultra-thin filter is realized, the practicability is better, and good economic benefit and social effect can be produced

3. In the aspect of magnetic core material selection, based on the application of high power, the product loss is vital, the product copper loss is the main loss, the method for increasing the wire diameter of a copper wire or reducing the number of turns is more common, the saturation magnetic flux density of the nanocrystalline material is far higher than that of a ferrite material, the nanocrystalline material has high initial magnetic permeability, a wide working frequency band, excellent impedance characteristics and wide and stable temperature characteristics, and is more and more widely applied to various high-power occasions, and the interlayer capacitance of a winding of the magnetic core can be reduced by adopting a clock winding structure so as to obtain higher resonance frequency.

Drawings

FIG. 1 is a schematic diagram of the overall assembly structure of the present utility model;

FIG. 2 is a schematic view of a substrate in a three-dimensional structure according to the present utility model;

fig. 3 is a schematic perspective view of a magnetic core according to the present utility model.

In the figure: 1. a magnetic core; 2. a flat region; 3. a circular arc region; 4. a winding; 5. a substrate; 6. a cross partition; 7. a hollow seat; 8. a boss; 9. pins; 10. and limiting the arc plate.

Detailed Description

Embodiments of the present utility model are described in further detail below with reference to the accompanying drawings and examples. The following examples are illustrative of the utility model but are not intended to limit the scope of the utility model.

As shown in fig. 1 to 3, a racetrack type heavy current common mode filter comprises a magnetic core 1 and windings 4, wherein the magnetic core 1 is in a racetrack type structure, the magnetic core 1 is made of nanocrystalline materials, the magnetic core 1 is composed of a straight area 2 and an arc area 3, the straight area 2 forms the middle part of the magnetic core 1 structure, the arc area 3 forms two sides of the magnetic core 1 structure, two windings 4 are wound on the surface of the magnetic core 1, the two windings 4 are both positioned in the straight area 2, the arc area 3 is not wired, the proportion between the two windings 4 is 1:1, the windings 4 adopt a clock winding structure, the clock winding structure is adopted for threading in the straight area 2 in the middle part of the magnetic core 1, the arc area 3 is not threaded, and the magnetic core 1 is in a racetrack type structure made of nanocrystalline materials, so that the compact design can effectively save space, promote power density, and is beneficial to miniaturization of the whole size of products;

as shown in fig. 1 and 2, a base plate 5 is arranged at the bottom of a magnetic core 1, the base plate 5 is matched with a flat area 2 to realize the overhead of two windings 4, a cross baffle 6 is fixedly arranged at the middle end of the top of the base plate 5, the two windings 4 are isolated by the cross baffle 6, an overhead seat 7 is fixedly arranged at two sides of the top of the base plate 5, the overhead seat 7 is used for placing an arc area 3, a boss 8 is fixedly arranged at two ends of the overhead seat 7 at two sides, pins 9 are fixedly arranged at the outer sides of the boss 8, the pins 9 are electrically connected with leads of the windings 4, when the magnetic core 1 with a wire is assembled with the base plate 5 under the guidance of a limiting arc plate 10, the two windings 4 are isolated by the cross baffle 6 fixed at the middle part of the base plate 5, then, because the two sides of the overhead seat 7 are higher than the plane height where the middle substrate 5 is located, the straight area 2 part of threading is overhead, the circular arc area 3 which is not threaded is put on the overhead seat 7, the assembly of the magnetic core 1 and the base is not affected by the threading area, and the lead wires of the winding 4 can be hung at the end parts of the pins 9, so that the runway type common mode inductor can be installed on the PCB in a sinking mode, the height of a product on the PCB is lower, the whole ultrathin filter is realized, the practicability is good, good economic benefit and social effect can be generated, the limiting arc plates 10 are fixedly installed on the inner sides of the bosses 8, and oval installation grooves are formed on the opposite surfaces of the limiting arc plates 10.

Working principle: when the runway type heavy current common mode filter is used, the clock winding structure is adopted to carry out threading in the straight area 2 in the middle of the magnetic core 1, the circular arc area 3 is not threaded, the magnetic core 1 is of the runway type structure made of nanocrystalline materials, the compact design can effectively save space, improve power density, is beneficial to miniaturization of the whole size of a product, when the magnetic core 1 with the threaded wire is assembled with the base plate 5 under the guidance of the limiting arc plate 10, the two windings 4 are isolated by the cross baffle 6 fixed in the middle of the base plate 5, then the two side overhead seats 7 are higher than the plane height of the middle base plate 5, so that the straight area 2 with threading is partially overhead, the circular arc area 3 without threading is put on the overhead seats 7, the assembly of the magnetic core 1 and the base is not affected, and the leads of the windings 4 can be hung at the end parts of the pins 9, thus, the runway type common mode inductor can be installed on the PCB in a sinking mode, the height of the product on the PCB is lower, the whole filter is realized, the practical effect is better, and the social benefit and the economic benefit is realized.

The embodiments of the utility model have been presented for purposes of illustration and description, and are not intended to be exhaustive or limited to the utility model in the form disclosed. Many modifications and variations will be apparent to those of ordinary skill in the art. The embodiments were chosen and described in order to best explain the principles of the utility model and the practical application, and to enable others of ordinary skill in the art to understand the utility model for various embodiments with various modifications as are suited to the particular use contemplated.

Claims

1. The utility model provides a runway type heavy current common mode filter, its characterized in that, includes magnetic core (1) and winding (4), magnetic core (1) comprises straight region (2) and circular arc region (3) two parts, and straight region (2) constitute magnetic core (1) structure middle part to circular arc region (3) constitute magnetic core (1) structure both sides, magnetic core (1) surface winding has two windings (4), and two windings (4) all are located straight region (2), and circular arc region (3) do not route.

2. The runway type heavy current common mode filter according to claim 1, wherein the magnetic core (1) is of a runway type structure, and the magnetic core (1) is made of nanocrystalline materials.

3. A racetrack high current common mode filter according to claim 1, characterized in that the ratio between the two windings (4) is 1:1 and the windings (4) are clock wound.

4. A racetrack high-current common-mode filter according to claim 1, characterized in that the bottom of the magnetic core (1) is provided with a base plate (5), and that the base plate (5) cooperates with the flat area (2) to realize the overhead of the two windings (4).

5. The runway type heavy current common mode filter according to claim 4, wherein a cross partition plate (6) is fixedly arranged at the middle end of the top of the base plate (5), and the cross partition plate (6) isolates the two windings (4).

6. The runway type heavy current common mode filter according to claim 4, wherein overhead seats (7) are fixedly arranged on two sides of the top of the base plate (5), and the overhead seats (7) are used for placing the arc area (3).

7. The runway type heavy current common mode filter according to claim 6, wherein the two ends of the overhead seat (7) at both sides are fixedly provided with bosses (8), pins (9) are fixedly arranged at the outer sides of the bosses (8), and the pins (9) are electrically connected with leads of the winding (4).

8. The runway type heavy current common mode filter according to claim 7, wherein limiting arc plates (10) are fixedly arranged on the inner sides of the four bosses (8), and elliptical mounting grooves are formed on opposite surfaces of the four limiting arc plates (10).