Stable large-current common-mode inductor

Abstract

The utility model discloses a stable large-current common-mode inductor, which comprises a magnetic core, a plurality of first magnetic strips and a plurality of second magnetic strips, the magnetic core comprises two first magnetic strips and two second magnetic strips, the two first magnetic strips and the two second magnetic strips surround to form a square ring, and the first magnetic strips are provided with a plurality of annular accommodating grooves; the two groups of winding varnished wires are respectively wound outside the two first magnetic strips, the cross section of each winding varnished wire is rectangular, the winding varnished wires are wound on the first magnet and the accommodating groove, two layers of winding varnished wires are arranged at the accommodating groove, and conductive pins with rectangular cross sections are arranged at the two ends of each winding varnished wire; the base is connected to the bottom of the magnetic core, four end pin seats are arranged at the bottom of the base, conductive end pins are arranged in the end pin seats, insertion holes are formed in the conductive end pins, and the conductive pins are inserted into the insertion holes. According to the utility model, the anti-electromagnetic interference working performance of the inductor can be effectively improved, the structure is compact and reliable, the assembly and connection operation is convenient, the effective conduction sectional area of each area can be effectively ensured, and the large-current working performance can be ensured.

Description

Technical Field

[0001] This utility model relates to the technical field of common mode inductors, and in particular to a stable high-current common mode inductor. Background Technology

[0002] A common-mode inductor is a special electronic component that plays an important role in electronic devices and circuits. A common-mode inductor is a coil wound in the same direction and number of turns on a closed magnetic ring, which has a significant suppression effect on common-mode interference.

[0003] With the rapid development of modern electronic technology, especially in the fields of power electronics, communication and automation control, the demand for common mode inductors is increasing. In particular, when dealing with high current applications, the stability and performance of common mode inductors are crucial. Existing common mode inductors have insufficient current carrying capacity, making it difficult to meet the application requirements of high current circuits, and their inductor operation stability is insufficient. Utility Model Content

[0004] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes a stable high-current common-mode inductor with strong current carrying capacity, stable and reliable inductor performance, and strong structural stability.

[0005] A stable high-current common-mode inductor according to an embodiment of the present invention includes:

[0006] The magnetic core includes two first magnetic strips and two second magnetic strips arranged in a square ring. The opposite ends of each first magnetic strip are respectively connected to the corresponding ends of the two second magnetic strips. The first magnetic strips are provided with a plurality of annular storage grooves with a width of D1.

[0007] The winding enameled wire has two sets and is wound around the two first magnetic strips respectively. The cross-section of the winding enameled wire is rectangular and the cross-sectional width of the winding enameled wire is D2, D1=nD2, where n is a positive integer. The cross-sectional length of the winding enameled wire is equal to the depth of the receiving groove. The winding enameled wire is wound around the first magnetic strip and the receiving groove. The winding enameled wire located in the receiving groove has two layers. Both ends of the winding enameled wire have conductive pins with rectangular cross-sections.

[0008] The base is connected to the bottom of the magnetic core. The bottom of the base has four end seats, each with a conductive end and a connector hole. The conductive pins are inserted into the connector holes.

[0009] In this embodiment, the conductive pin includes a conductive substrate and two conductive springs. The two conductive springs are respectively connected to opposite sides of the conductive substrate, and the space between the two conductive springs forms a socket. The two conductive springs are clamped to opposite sides of the conductive pin.

[0010] In the embodiment, the side of the conductive elastic sheet close to the conductive pin is covered with a conductive glue layer, and the side of the conductive pin abuts against the conductive glue layer.

[0011] In the embodiment, the conductive bottom sheet is provided with a reinforcing through hole, and the reinforcing through hole is communicated with the connector hole.

[0012] In the embodiment, the base is provided with four positioning holes, each of which is connected to the top end of the corresponding connector hole, and each conductive pin is also respectively inserted into the corresponding positioning hole.

[0013] In the embodiment, the base is provided with an outer positioning plate, each of which is located outside the two second magnetic strips, and the top of each outer positioning plate is provided with a positioning buckle, and the positioning buckle is clamped and connected to the top of the second magnetic strip.

[0014] In the embodiment, the second magnetic strip is provided with a positioning groove, and the positioning buckle is clamped and connected in the positioning groove.

[0015] In the embodiment, the base is also provided with an inner positioning member, and the inner positioning member is located in the ring of the magnetic core.

[0016] The embodiments of the utility model have at least the following beneficial effects:

[0017] By setting the rectangular cross-section winding enameled wire, the current carrying capacity can be effectively improved, thereby meeting the application requirements of the large current circuit scene, and the mechanical strength and heat dissipation performance of the winding can be effectively improved, the winding number is increased by setting the storage groove in the first magnet, the winding enameled wire at the position of the storage groove can be wound in two layers, the electromagnetic interference working performance of the inductor can be effectively improved under the premise of constant inductor volume, the winding structure of the winding enameled wire is compact and reliable, the magnetic force leakage is small, the conduction radiation effect is good, the anti-interference performance of large current work can be further improved, and the stability of the connecting structure between the winding enameled wire and the magnetic core can be effectively improved, thereby improving the stability and consistency of the inductor overall structure. BRIEF DESCRIPTION OF DRAWINGS

[0018] The above and / or additional aspects and advantages of the utility model will become apparent and more readily appreciated from the following description of the embodiments, with reference to the following drawings, in which:

[0019] Figure 1 It is a three-dimensional structure schematic view of the stable large current common mode inductor of the utility model embodiment;

[0020] Figure 2 A top view structural schematic diagram of the stable large-current common mode inductor of the embodiment of the present application;

[0021] Figure 3 is along Figure 2 A section structure schematic diagram along A-A';

[0022] Figure 4 is along Figure 2 A section structure schematic diagram along B-B';

[0023] Figure 5 A exploded structure schematic diagram of the stable large-current common mode inductor of the embodiment of the present application.

[0024] Reference signs:

[0025] Magnetic core 100, first magnetic strip 110, storage groove 111, second magnetic strip 120, positioning groove 121;

[0026] Winding enameled wire 200, conductive pin 210;

[0027] Base 300, positioning hole 301, end foot base 310, conductive end foot 320, conductive bottom sheet 321, conductive elastic sheet 322, conductive adhesive layer 323, connector hole 330, reinforcing through hole 340, outer positioning plate 350, positioning buckle 351, inner positioning piece 360. DETAILED DESCRIPTION

[0028] The embodiments of the present application will be described in detail below, and examples of the embodiments are shown in the drawings, wherein the same or similar reference signs represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary and are only used to explain the present application, and cannot be understood as a limitation of the present application.

[0029] In the description of the present application, it should be understood that, if there is a description of the orientation, for example, the orientation or position relationship indicated by up, down, left, right, front, back, etc. is based on the orientation or position relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as a limitation of the present application.

[0030] In the description of the present application, if there is a description of the wire sleeve and the support, it is only for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or the sequence of the indicated technical features.

[0031] In the description of the utility model, unless otherwise explicitly limited, the words such as setting, installing, connecting should be understood broadly, and the specific meaning of the above words in the utility model can be determined by the person skilled in the art in combination with the specific content of the technical scheme.

[0032] Common mode inductance is a special electronic component, which plays an important role in electronic equipment and circuit, common mode inductance is a coil with the same winding direction and number of turns on a closed magnetic ring, which has significant suppression effect on common mode interference. With the rapid development of modern electronic technology, especially in the fields of power electronics, communication and automation control, the demand for common mode inductance is increasing, especially in the processing of large current application, the stability and performance of common mode inductance are crucial, the current carrying capacity of existing common mode inductance is insufficient, which is difficult to meet the application requirements of large current circuit, and the inductance working stability is insufficient.

[0033] Traditional common mode inductance design often has problems such as complex winding structure and limited current carrying capacity, especially in high frequency and large current working environment, these problems are particularly prominent, traditional common mode inductance usually adopts circular or square magnetic core structure, and enameled wire is directly wound on the magnetic core, this design not only limits the current processing capacity, but also may cause electromagnetic interference between windings and heat accumulation.

[0034] The following refers to the drawings Figure 1 to the drawings Figure 5 The utility model discloses a stable large current common mode inductance, which has strong current carrying capacity, stable and reliable inductance performance and strong structural stability.

[0035] Referring to Figures 1 to 5 The utility model discloses a stable large current common mode inductance, which has strong current carrying capacity, stable and reliable inductance performance and strong structural stability.

[0036] The magnetic core 100 includes two first magnetic strips 110 and two second magnetic strips 120 surrounding a square ring, the two first magnetic strips 110 are parallel to each other, the two second magnetic strips 120 are parallel to each other, the opposite ends of each first magnetic strip 110 are connected to the corresponding end portions of the two second magnetic strips 120 respectively, so that one of the first magnetic strips 110, one of the second magnetic strips 120, the other first magnetic strip 110 and the other second magnetic strip 120 are connected in sequence to form a square ring structure, each first magnetic strip 110 is provided with a plurality of evenly distributed and annular receiving grooves 111, and the width of the receiving groove 111 is D1.

[0037] The winding enameled wire 200 is provided with two groups and is wound around the two first magnetic strips 110. For each winding enameled wire 200: the single section of the winding enameled wire 200 is a flat rectangle, the section width of the winding enameled wire 200 is D2, D1 = nD2, n is a positive integer, n is an integer greater than or equal to 1, that is, the width of the receiving groove 111 is set to be at least the section width of the winding enameled wire 200, which can ensure that the receiving groove 111 can at least receive one winding enameled wire 200, the section length of the winding enameled wire 200 is equal to the depth of the receiving groove 111, so that the outer surface of the winding enameled wire 200 is coplanar with the surface of the first magnetic strip 110 after the winding enameled wire 200 is wound around the receiving groove 111, the winding enameled wire 200 is wound around the first magnetic strip 110 and each receiving groove 111 of the same first magnetic strip, the winding enameled wire 200 at the receiving groove 111 is provided with two layers to align the outer surface of the winding enameled wire 200, and the two ends of the winding enameled wire 200 are provided with conductive pins 210 with the same flat rectangular section;

[0038] The base 300 is connected to the bottom of the magnetic core 100, and the bottom of the base 300 is provided with four end foot seats 310, each of which is provided with a conductive end foot 320, and each of the conductive end feet 320 is provided with a plug hole 330 matched with the conductive pin 210. Each conductive pin 210 is respectively plugged into the corresponding plug hole 330, and the conductive pin 210 is plugged into the corresponding plug hole 330 to realize the conductive communication with the conductive end foot 320. The conductive pin 210 is a flat to conductive structure after removing the insulating paint, which can effectively ensure the effective conductive area.

[0039] By setting the winding enameled wire 200 with a rectangular cross section, not only can the current carrying capacity be effectively improved to meet the application requirements of large current circuit scenarios, but also the mechanical strength and heat dissipation performance of the winding can be effectively improved. By setting the receiving groove 111 in the first magnet to increase the number of winding turns, the winding enameled wire at the position of the receiving groove 111 can be wound in two layers, which can effectively increase the electromagnetic interference performance of the inductor under the premise of constant inductor volume. The winding structure of the winding enameled wire 200 is compact and reliable, the magnetic force leakage is small, the conduction radiation effect is good, the consistency is good, and the anti-interference performance of large current work can be further improved. Moreover, the setting of the receiving groove 111 can effectively improve the stability of the connection structure between the winding enameled wire 200 and the magnetic core 100, thereby improving the stability and consistency of the overall structure of the inductor. By using the connector hole 330 to connect the conductive pin 210, the installation and connection of the conductive pin 210 and the conductive end foot 320 are convenient, thereby effectively improving the assembly production efficiency. Moreover, the cross section of the conductive pin 210 is set to be rectangular to match the winding enameled wire 200, which can effectively ensure the effective conduction cross-sectional area of each region, effectively ensure the performance of large current work, and effectively reduce the contact impedance, thereby improving the overall performance of the common mode inductor.

[0040] It can be understood that for each conductive end foot 320: the conductive end foot 320 includes a conductive bottom sheet 321 and two conductive spring sheets 322 connected to opposite sides of the conductive bottom sheet 321. The conductive bottom sheet 321 is used for surface mount welding on a circuit board. The clamping space between the two conductive spring sheets 322, i.e., the spacing, forms a connector hole 330. That is, the two conductive spring sheets 322 form a connector hole 330 for clamping between them. The two conductive spring sheets 322 are clamped on opposite sides of the corresponding conductive pin 210.

[0041] By clamping the conductive spring sheet 322 to the conductive pin 210, the convenience of the connector connection action can be further improved, and the reliability of the conductive spring sheet 322 and the conductive pin 210 conductive abutting contact structure can be effectively improved, and the conductive performance can be effectively improved.

[0042] It can be understood that each conductive spring sheet 322 has a conductive adhesive layer 323 on the side close to the conductive pin 210. The side surface of the conductive pin 210 abuts against the conductive adhesive layer 323. By using the elasticity and conductive performance of the conductive adhesive layer 323, the stability of the clamping structure formed by the two conductive spring sheets 322 on the conductive pin 210 can be effectively improved, and the conductive pin 210 can be effectively clamped, thereby effectively improving the conductive contact effect between the conductive pin 210 and the conductive end foot 320. The stability of the conductive connection structure is strong, and the conductive connection effect is reliable.

[0043] Specifically, the conductive adhesive layer 323 is a conductive silver adhesive layer, which is mainly composed of a resin matrix, conductive ions, dispersing additives, and auxiliary agents, and can be used for filling or adhesion.

[0044] It can be understood that the conductive base sheet 321 is provided with a reinforced through hole 340, which is in communication with the connector hole 330. When the conductive pin 210 is connected between the two conductive elastic sheets 322 and the conductive base sheet 321 is welded to the pad of the circuit board, the solder paste fills the reinforced through hole 340 and climbs up to the conductive pin 210. After the solder paste solidifies, it not only increases the stability of the connection structure between the conductive base sheet 321 and the pad of the circuit board, but also increases the stability of the connection structure between the conductive pin 210 and the pad of the circuit board, which can significantly improve the stability of the structure after welding of the common mode inductor, and the application structure is stable and firm.

[0045] It can be understood that the base 300 is provided with four positioning holes 301 respectively matched with each conductive pin 210, and each positioning hole 301 is connected to the top end of the corresponding connector hole 330 to enable the positioning hole 301 to communicate with the connector hole 330. Each conductive pin 210 is also respectively connected to the corresponding positioning hole 301. Specifically, each conductive pin 210 is connected to the corresponding connector hole 330 after passing through the corresponding positioning hole 301. By adding the positioning hole 301 through which the conductive pin 210 passes, the stability of the relative position between the winding enameled wire 200 and the base 300 can be effectively improved, and the stability of the overall structure of the common mode inductor can be effectively improved.

[0046] It can be understood that the base 300 is provided with an outer positioning plate 350, and each outer positioning plate 350 is located on the outer ring side of the two second magnetic strips 120. The two outer positioning plates 350 are located on the opposite sides of the magnetic core 100. The top of each outer positioning plate 350 is provided with a positioning buckle 351, which is clamped and connected to the top of the second magnetic strip 120. By setting the positioning buckle 351 to stabilize the relative position between the magnetic core 100 and the base plate, the stability of the structure of the common mode inductor can be effectively improved, and the assembly operation can be simplified, thereby improving the assembly production efficiency.

[0047] It can be understood that the second magnetic strip 120 is provided with a positioning groove 121 matched with the positioning buckle 351, and the positioning buckle 351 is clamped and connected in the positioning groove 121. By setting the positioning buckle 351 cooperating with the positioning groove 121, the stability of the connection structure between the magnetic core 100 and the base 300 can be effectively improved.

[0048] It can be understood that the base 300 is also provided with an inner positioning piece 360, the inner positioning piece 360 is located in the ring of the magnetic core 100, and the inner positioning piece 360 is also located between the two groups of winding enameled wires 200. Through the cooperation of the inner positioning piece 360, the two groups of outer positioning plates 350 and the positioning buckles 351 thereon, the relative position between the magnetic core 100 and the base 300 can be reinforced from various dimensions, and the stability of the overall structure can be effectively improved.

[0049] Although the embodiments of the utility model have been shown and described, those skilled in the art can understand that various changes, modifications, replacements and variations can be made to these embodiments without departing from the principles and purposes of the utility model, and the scope of the utility model is defined by the claims and their equivalents.

Claims

1. A stable large current common mode inductor, characterized by, The application relates to a magnetic core (100) comprising two first magnetic strips (110) and two second magnetic strips (120) arranged in a square ring, opposite ends of each first magnetic strip (110) being connected to corresponding ends of two second magnetic strips (120), each first magnetic strip (110) being provided with a plurality of ring-shaped receiving grooves (111), and the width of each receiving groove (111) being D1. The application also relates to a winding enameled wire (200) provided with two groups and arranged outside the two first magnetic strips (110), the cross section of the winding enameled wire (200) being rectangular, the cross section width of the winding enameled wire (200) being D2, D1 = nD2 (n is a positive integer), the cross section length of the winding enameled wire (200) being equal to the depth of the receiving groove (111), the winding enameled wire (200) being wound around the first magnetic strip (110) and the receiving groove (111), the winding enameled wire (200) at the receiving groove (111) being provided with two layers, and each end of the winding enameled wire (200) being provided with a conductive pin (210) with a rectangular cross section. The application further relates to a base (300) connected to the bottom of the magnetic core (100), the bottom of the base (300) being provided with four end foot bases (310), each end foot base (310) being provided with a conductive end foot (320), the conductive end foot (320) being provided with a plug hole (330), and the conductive pin (210) being plugged into the plug hole (330). The conductive end foot (320) comprises a conductive bottom sheet (321) and two conductive elastic sheets (322), the two conductive elastic sheets (322) being connected to opposite sides of the conductive bottom sheet (321), the space between the two conductive elastic sheets (322) forming the plug hole (330), and the two conductive elastic sheets (322) being clamped to opposite sides of the conductive pin (210).

2. The stable high-current common-mode inductor of claim 1, wherein, The side of the conductive elastic sheet (322) close to the conductive pin (210) is covered with a conductive adhesive layer (323), and the side surface of the conductive pin (210) abuts against the conductive adhesive layer (323).

3. The stable high-current common-mode inductor of claim 2, wherein, The conductive bottom sheet (321) is provided with a reinforcing through hole (340) in communication with the plug hole (330).

4. The stable high-current common-mode inductor of claim 3, wherein, The base (300) is provided with four positioning holes (301), each positioning hole (301) being connected to the top end of a corresponding plug hole (330), and each conductive pin (210) being further plugged into a corresponding positioning hole (301).

5. The stable high-current common-mode inductor of claim 1, wherein, The base (300) is provided with an outer positioning plate (350), each outer positioning plate (350) being located outside the two second magnetic strips (120), and the top of each outer positioning plate (350) being provided with a positioning buckle (351) clamped to the top of the second magnetic strip (120).

6. The stable high-current common-mode inductor of claim 1, wherein, The second magnetic strip (120) is provided with a positioning groove (121), and the positioning buckle (351) is clamped into the positioning groove (121).

7. The stable high-current common-mode inductor of claim 6, wherein, ​ 8. The stable high-current common-mode inductor of claim 7, wherein, The base (300) is further provided with an inner positioning member (360), and the inner positioning member (360) is located in the ring of the magnetic core (100).

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