Common mode inductor integrated with differential mode filter

Abstract

The utility model belongs to the technical field of electronic components, and particularly relates to a common-mode inductor integrated with differential-mode filtering, which comprises a bottom plate and a common-mode magnetic core, a partition plate is fixedly connected to the top of the bottom plate, a placement groove is formed in the partition plate, a magnetic conductive sheet is arranged in the placement groove, and the common-mode magnetic core is arranged in the placement groove. According to the common-mode inductor, the common-mode magnetic core is matched with the two winding coils, common-mode noise is effectively restrained, the containing groove is formed in the partition plate in the middle of the common-mode inductor, and the magnetic conductive sheet is arranged in the containing groove, so that the common-mode inductor is integrated with a differential-mode inductor and has the capability of filtering differential-mode noise, and the common-mode inductor has the advantages of being simple in structure and convenient to use. An additional differential mode inductor is avoided, and cost reduction and space saving are realized.

Description

TECHNICAL FIELD

[0001] The utility model relates to electronic components technical field, concretely is a kind of integrated common mode inductance of differential mode filtering. BACKGROUND

[0002] Common mode inductance is a kind of passive component for suppressing electromagnetic interference, mainly used to eliminate common mode noise in circuit. Common mode noise is a form of electromagnetic interference in electronic systems, which refers to the voltage or current that appears simultaneously and has the same phase on two or more conductors relative to ground. Differential mode noise is also a form of electromagnetic interference in electronic circuits, which refers to the voltage or current that exists between a pair of conductors or signal paths, and the direction is opposite. Unlike common mode noise, differential mode noise flows between two conductors, and the two signals are opposite, one is positive, and the other is negative.

[0003] The existing common mode inductance can only filter out common mode noise, and does not have the ability to filter out differential mode noise. Differential mode noise filtering usually requires additional differential mode inductance, which not only increases the cost, but also requires more space, reducing the practicability. Therefore, we propose a kind of integrated common mode inductance of differential mode filtering. SUMMARY

[0004] In view of the deficiencies of the prior art, the utility model provides a kind of integrated common mode inductance of differential mode filtering, realizes the effective suppression to common mode noise by the cooperation of common mode magnetic core and two groups of winding coils, and the placing groove is opened on the partition in the middle of common mode inductance, and the magnetic conducting sheet is arranged inside the placing groove, so that the common mode inductance integrates differential mode inductance, has the ability to filter out differential mode noise, avoids to increase additional differential mode inductance, realizes the reduction of cost and the saving of space, solves the problem in the background.

[0005] To achieve the above purpose, the utility model is realized by the following technical scheme: a kind of integrated common mode inductance of differential mode filtering, including bottom plate and common mode magnetic core, the top of the bottom plate is fixedly connected with partition, the partition is opened with placing groove, the inside of the placing groove is provided with magnetic conducting sheet, the top of the placing groove is clamped with partition cover, the common mode magnetic core is sleeved on the partition, the top and bottom of the common mode magnetic core are provided with upper shell and lower shell respectively, the upper shell and lower shell form magnetic core protection shell, the front and rear sides of the outer surface of magnetic core protection shell are wound with winding coil, the inner circle side wall left and right sides of the lower shell are fixedly connected with two groups of L-shaped plate one, the inner circle side wall left and right sides of the upper shell are fixedly connected with two groups of L-shaped plate two, the top of the partition is abutted with L-shaped plate two on front and rear sides, the bottom of the partition is abutted with L-shaped plate one on front and rear sides.

[0006] Preferably, the inner ring top side and the outer ring top side of the lower shell are fixedly connected with the slot one and the sleeve one respectively, the inner wall of the inner ring and the inner wall of the outer ring of the upper shell are both provided with the slot two and the sleeve two, the slot one is inserted into the slot two, and the sleeve one is inserted into the sleeve two.

[0007] Preferably, the front side and the rear side of the bottom plate are both provided with the insertion hole, and the two ends of the winding coil are both arranged on the insertion hole.

[0008] Preferably, the common mode magnetic core is annular, and the common mode magnetic core is manufactured by nanocrystalline strip material.

[0009] Preferably, the magnetic conducting sheet is strip-shaped, and the magnetic conducting sheet is manufactured by nanocrystalline thin strip.

[0010] Preferably, the top side and the bottom side of the common mode magnetic core are both provided with silica gel, and the top side and the bottom side of the common mode magnetic core are both adhered to the inner walls of the upper shell and the lower shell by the silica gel.

[0011] Compared with the prior art, the common mode inductance integrated with differential mode filtering has the following beneficial effects:

[0012] 1. The common mode inductance integrated with differential mode filtering realizes effective suppression on common mode noise through cooperation of the common mode magnetic core and the two groups of winding coils, the placement groove is arranged on the partition plate in the middle of the common mode inductance, the magnetic conducting sheet is arranged in the placement groove, the common mode inductance is integrated with differential mode inductance, has the ability of filtering differential mode noise, avoids increasing additional differential mode inductance, and realizes reduction of cost and saving of space. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 It is a front view structural schematic diagram of the main body of the utility model;

[0014] Figure 2 It is a split structure schematic diagram of the main body of the utility model;

[0015] Figure 3 It is an internal structure schematic diagram of the lower shell and the upper shell of the utility model;

[0016] Figure 4 It is an external structure schematic diagram of the lower shell and the upper shell of the utility model.

[0017] In the drawing: 1, bottom plate; 2, lower shell; 3, upper shell; 4, winding coil; 5, partition plate; 6, placement groove; 7, common mode magnetic core; 8, magnetic conducting sheet; 9, partition plate cover; 10, insertion hole; 11, sleeve one; 12, sleeve two; 13, slot one; 14, slot two; 15, L-shaped plate one; 16, L-shaped plate two. PREFERRED EMBODIMENT

[0018] The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the drawings in the embodiments of the present utility model. Obviously, the described embodiments are only part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of the present utility model.

[0019] Please refer to Figures 1-4 The utility model provides a kind of integrated common mode inductance of differential mode filter, including bottom plate 1 and common mode magnetic core 7, the top of bottom plate 1 is fixedly connected with baffle 5, baffle 5 is equipped with placing groove 6, the inside of placing groove 6 is provided with magnetic sheet 8, placing groove 6 is connected with baffle cover 9, common mode magnetic core 7 is sleeved on baffle 5, the top and bottom of common mode magnetic core 7 are provided with upper shell 3 and lower shell 2, upper shell 3 and lower shell 2 form magnetic core protection shell, the front and rear sides of the outer surface of magnetic core protection shell are wound with winding coil 4, the left and right sides of the inner circle side wall of lower shell 2 are fixedly connected with two groups of L-shaped plate one 15, the left and right sides of the inner circle side wall of upper shell 3 are fixedly connected with two groups of L-shaped plate two 16, the top of baffle 5 is abutted with L-shaped plate two 16, the bottom of baffle 5 is abutted with L-shaped plate one 15.

[0020] The common mode inductance provided by the utility model realizes effective suppression to common mode noise by the cooperation of common mode magnetic core 7 and two winding coils 4, and placing groove 6 is equipped on baffle 5 on the top of bottom plate 1, magnetic sheet 8 is arranged in the inside of placing groove 6, so that the common mode inductance integrates differential mode inductance, has the ability of filtering differential mode noise, avoids increasing additional differential mode inductance, realizes the reduction of cost and the saving of space, baffle cover 9 is connected on the top of placing groove 6, realizes the packaging of magnetic sheet 8, plays the electrical isolation effect of winding coil 4, and common mode magnetic core 7 is packaged by the connecting cooperation of upper shell 3 and lower shell 2, the left and right sides of upper shell 3 are connected on baffle 5 by two groups of L-shaped plate one 15, the left and right sides of lower shell 2 are connected on baffle 5 by two groups of L-shaped plate two 16, so as to realize the stable installation of common mode magnetic core 7 on bottom plate 1.

[0021] The top side and the outer circle top side of the inner circle of lower shell 2 are fixedly connected with slot one 13 and bush one 11 respectively, the inner wall and the outer wall of the inner circle of upper shell 3 are provided with slot two 14 and bush two 12, slot one 13 is inserted in slot two 14, bush one 11 is inserted in bush two 12, to realize the connecting cooperation of upper shell 3 and lower shell 2.

[0022] The front and rear sides of bottom plate 1 are all equipped with insertion hole 10, and the two ends of winding coil 4 are all arranged in insertion hole 10, so that winding coil 4 is fixed on bottom plate 1.

[0023] The common mode magnetic core 7 is annular, and is made of nanocrystalline strip material, so that the common mode magnetic core 7 has excellent magnetic properties and low loss.

[0024] The magnetic conducting sheet 8 is strip-shaped, and is made of nanocrystalline thin strip material, so that the magnetic conducting sheet 8 has excellent magnetic properties and low loss.

[0025] The top side and the bottom side of the common mode magnetic core 7 are provided with silica gel, and the top side and the bottom side of the common mode magnetic core 7 are respectively adhered to the inner walls of the upper shell 3 and the lower shell 2 through the silica gel, so as to prevent the common mode magnetic core 7 from moving and protect the common mode magnetic core 7.

[0026] Working principle: the common mode inductance provided by the utility model realizes effective suppression of common mode noise through cooperation of the common mode magnetic core 7 and the two groups of winding coils 4, and the placement groove 6 is arranged on the partition plate 5 on the top of the bottom plate 1, the magnetic conducting sheet 8 is arranged inside the placement groove 6, so that the common mode inductance integrates the differential mode inductance and has the ability of filtering differential mode noise, thereby avoiding increasing additional differential mode inductance, realizing cost reduction and space saving, the partition plate cover 9 is clamped on the top of the placement groove 6, realizing packaging of the magnetic conducting sheet 8, playing the electrical isolation role of the winding coil 4, and the common mode magnetic core 7 is packaged through clamping cooperation of the upper shell 3 and the lower shell 2, the left and right sides of the upper shell 3 are clamped on the partition plate 5 through the two groups of L-shaped plates one 15, the left and right sides of the lower shell 2 are clamped on the partition plate 5 through the two groups of L-shaped plates two 16, so as to realize stable mounting of the common mode magnetic core 7 on the bottom plate 1.

[0027] It should be noted that the relational terms herein such as first and second and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any such actual relationship or order between such entities or actions. Moreover, the terms "comprises", "comprising", or any other variations thereof, are intended to cover a non-exclusive inclusion such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can include other elements not expressly listed or inherent to such process, method, article, or apparatus.

[0028] Although the embodiments of the utility model have been shown and described, it should be understood by those of ordinary skill in the art that various changes, modifications, replacements and variations can be made to these embodiments without departing from the principles and spirits of the utility model, and the scope of the utility model is defined by the appended claims and their equivalents.

Claims

1. An integrated common mode inductor with differential mode filtering comprising a base plate (1) and a common mode core (7), characterized in that: The top of the bottom plate (1) is fixedly connected with a partition plate (5), the partition plate (5) is provided with a placing groove (6), the inside of the placing groove (6) is provided with a magnetic conducting sheet (8), the top of the placing groove (6) is clamped with a partition plate cover (9), the common mode magnetic core (7) is sleeved on the partition plate (5), the top and bottom of the common mode magnetic core (7) are provided with an upper shell (3) and a lower shell (2) respectively, the upper shell (3) and the lower shell (2) constitute a magnetic core protection shell, the front and rear outer surfaces of the magnetic core protection shell are wound with winding coils (4), the inner ring side walls of the lower shell (2) are fixedly connected with two groups of L-shaped plates one (15) on the left and right sides, the inner ring side walls of the upper shell (3) are fixedly connected with two groups of L-shaped plates two (16) on the left and right sides, the top front and rear sides of the partition plate (5) abut against the L-shaped plates two (16), and the bottom front and rear sides of the partition plate (5) abut against the L-shaped plates one (15).

2. The integrated differential mode filtered common mode inductor of claim 1, wherein: The inner ring top side and the outer ring top side of the lower shell (2) are fixedly connected with a slot one (13) and a sleeve one (11) respectively, the inner ring inner wall and the outer ring inner wall of the upper shell (3) are provided with a slot two (14) and a sleeve two (12) respectively, the slot one (13) is inserted into the slot two (14), and the sleeve one (11) is inserted into the sleeve two (12).

3. The integrated differential mode filtered common mode inductor of claim 1, wherein: The front and rear sides of the bottom plate (1) are provided with an insertion hole (10), and the two ends of the winding coil (4) are inserted into the insertion hole (10).

4. The integrated differential mode filtered common mode inductor of claim 1, wherein: The common mode magnetic core (7) is annular, and the common mode magnetic core (7) is made of nanocrystalline strip material.

5. The integrated differential mode filtered common mode inductor of claim 1, wherein: The magnetic conducting sheet (8) is strip-shaped, and the magnetic conducting sheet (8) is made of nanocrystalline thin strip.

6. The integrated differential mode filtered common mode inductor of claim 1, wherein: The top side and the bottom side of the common mode magnetic core (7) are provided with silica gel, and the top side and the bottom side of the common mode magnetic core (7) are adhered to the inner walls of the upper shell (3) and the lower shell (2) by silica gel respectively.

Images