Differential mode and common mode integrated inductor

Abstract

The utility model discloses a differential mode and common mode integrated inductor, which relates to the field of inductor structures and comprises a base, a magnetic core is arranged on the base, coils are wound on two sides of the magnetic core, winding directions of the two coils are opposite, two ends of each coil are connected with pins, a plurality of pins are arranged at four corners of the base, and a clamping device is arranged between the base and the magnetic core. The clamping and fixing device comprises at least two clamping plates, the two clamping plates are arranged at the two ends of the base respectively, clamping and fixing pieces are arranged on the clamping plates, clamping and fixing grooves are formed in the two ends of the magnetic core, and the clamping and fixing grooves are matched with the clamping and fixing pieces in a clamping and fixing mode; according to the differential and common mode integrated inductor, the clamping device is arranged between the base and the magnetic core, so that the magnetic core and the coil are kept stable in the welding process, shaking is reduced, and the welding precision and the product stability are improved.

Description

Technical Field

[0001] The utility model relates to the field of inductor structures, in particular to a differential and common mode integrated inductor. Background Art

[0002] The differential common mode integrated inductor is an inductor device that combines the functions of common mode inductor and differential mode inductor, which can filter out common mode interference and differential mode interference at the same time. Due to the advantages of small size, small space occupation and wide operating frequency range, the differential common mode integrated inductor is widely used in power supply filtering, data transmission lines, radio frequency circuits and other fields.

[0003] However, during the production process of existing differential and common mode integrated inductors, there is a lack of corresponding pre-positioning devices between the magnetic core, coil and base. When welding the coil and the base pins, the magnetic core and coil are prone to shaking, which not only increases the difficulty of welding, but may also affect the stability and performance of the differential and common mode integrated inductors. Utility Model Content

[0004] The purpose of the utility model is to provide a differential common mode integrated inductor, which provides a clamping device between the base and the magnetic core to keep the magnetic core and the coil stable during the welding process, reduce shaking, and improve welding accuracy and product stability.

[0005] The above-mentioned optimized structure of the utility model is achieved through the following technical solutions: a differential common mode integrated inductor, including a base, a magnetic core is provided on the base, coils are wound on both sides of the magnetic core, the winding directions of the two coils are opposite, pins are connected to both ends of the coils, and multiple pins are arranged at the four corners of the base, a clamping device is provided between the base and the magnetic core, the clamping device includes at least two clamping plates, the two clamping plates are respectively arranged at both ends of the base, clamping pieces are provided on the clamping plates, and clamping grooves are provided at both ends of the magnetic core, and the clamping grooves are clamped and matched with the clamping pieces.

[0006] In some embodiments, the clamping member includes a fixing plate, the fixing plate is fixedly arranged on the top of the clamping plate, and a protrusion is arranged on one end of the fixing plate close to the magnetic core, and the protrusion is clamped and matched with the clamping groove.

[0007] In some embodiments, a plurality of heat dissipation plates are provided in parallel at one end of the fixing plate away from the magnetic core.

[0008] In some embodiments, the fixing plate is L-shaped.

[0009] In some embodiments, the clamping member is made of aluminum alloy, and the clamping plate is made of polyurethane.

[0010] In some embodiments, there are four card plates, and the four card plates are symmetrically arranged at two ends of the base.

[0011] In some embodiments, the magnetic core includes two middle columns, the two middle columns are disposed between the two coils, and a gap is left between the two middle columns.

[0012] In some embodiments, limiting grooves are provided on both sides of the base, and the coil is supported in the limiting grooves.

[0013] In some embodiments, mounting grooves are provided at the four corners of the base, and a first opening and a second opening are respectively provided at both ends of the limiting groove, the first opening and the second opening are both connected to the mounting groove, the first opening is provided on the side of the limiting groove close to the middle column, and the second opening is provided on the side of the limiting groove away from the middle column.

[0014] In summary, the utility model has the following beneficial effects:

[0015] This differential common mode integrated inductor is provided with a clamping device between the base and the magnetic core. Through the clamping cooperation between the clamping piece and the clamping groove, the magnetic core and the base are pre-positioned during installation, the stability between the magnetic core and the base is improved, and the shaking of the magnetic core and the coil on the base is reduced, thereby improving the welding accuracy and the stability of the product. At the same time, the design of the heat sink enhances the heat dissipation performance of the inductor and increases the service life of the inductor. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0017] Figure 2 It is a structural diagram of the coil and the magnetic core of the utility model;

[0018] Figure 3 This is a structural diagram of the utility model without the coil and the magnetic core;

[0019] Figure 4 It is an enlarged view of point A of the utility model;

[0020] Figure 5 This is a bottom view of the utility model without the coil and the magnetic core.

[0021] In the figure: 1. base; 11. limit groove; 12. mounting groove; 13. first opening; 14. second opening; 2. magnetic core; 3. coil; 4. pin; 21. fixing groove; 22. center column; 23. gap; 5. fixing device; 51. fixing plate; 52. fixing plate; 53. bump; 54. heat sink. 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 them. Based on the embodiments of 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] refer to Figure 1-5 A differential common mode integrated inductor includes a base 1, which can be made of insulating material, such as polyurethane, to ensure isolation between the inductor and the external environment. A magnetic core 2 is provided on the base 1, which can be made of high magnetic permeability material, such as ferrite, for providing the magnetic field required by the inductor. The magnetic core 2 includes two middle columns 22, which are arranged between two coils 3, and a gap 23 is left between the two middle columns 22. The size of the gap 23 can be adjusted according to actual conditions to meet the needs of different leakage inductances. Coils 3 are wound on both sides of the magnetic core 2, and the coils 3 can be made of conductive materials, such as copper wire or aluminum wire. The winding directions of the two coils 3 are opposite to achieve common mode and differential mode filtering functions. Pins 4 are connected to both ends of the coil 3, and multiple pins 4 are arranged at the four corners of the base 1. A clamping device 5 is provided between the base 1 and the magnetic core 2, and clamping grooves 21 are provided at both ends of the magnetic core 2. The clamping device 5 includes at least two clamping plates 51, and the two clamping plates 51 The clamping plate 51 is arranged at both ends of the base 1, and the clamping plate 51 can be integrally formed with the base 1, which can enhance the connection strength between the clamping plate 51 and the base 1; the clamping plate 51 is made of polyurethane material, which has excellent elasticity and wear resistance, so that the clamping plate 51 has a certain elastic deformation when subjected to force, so that the clamping piece can be clamped and matched with the clamping groove 21, and the clamping piece is provided on the clamping plate 51. The clamping piece can be made of aluminum alloy, which has light weight, high thermal conductivity and good mechanical properties. The clamping piece may include a fixing plate 52, which is fixed on the top of the clamping plate 51, and a protrusion 53 is provided at one end of the fixing plate 52 close to the magnetic core 2. The shape and size of the protrusion 53 match the clamping groove 21 at both ends of the magnetic core 2. The protrusion 53 is clamped and matched with the clamping groove 21 to achieve pre-positioning of the magnetic core 2 and the base 1 during installation, improve the stability between the magnetic core 2 and the base 1, and reduce the shaking of the magnetic core 2 and the coil 3 on the base 1, thereby improving the welding accuracy and the stability of the product.

[0024] In some embodiments, a plurality of heat sinks 54 are provided in parallel at one end of the fixing plate 52 away from the magnetic core 2. The heat generated by the magnetic core 2 during operation can be conducted to the fixing plate 52 through a protrusion 53 that is engaged with the locking groove 21, and dissipated through the plurality of heat sinks 54, thereby improving the heat dissipation performance of the inductor and extending its service life.

[0025] In some embodiments, the fixing plate 52 may be L-shaped, which may enhance its structural strength and increase the connection area between the fixing plate 52 and the card plate 51 , thereby enhancing the stability of the connection with the card plate 51 .

[0026] In some embodiments, there may be four card plates 51, which are symmetrically arranged at both ends of the base 1 to provide uniform and stable support, while shortening the conduction distance between the heat sink 54 and the heat source of the magnetic core 2 to improve heat dissipation efficiency.

[0027] In some embodiments, limiting grooves 11 are provided on both sides of the base 1, and the coil 3 is supported in the limiting grooves 11 to prevent the coil 3 from being displaced during the welding process. Installation grooves 12 are provided at the four corners of the base 1, and a first opening 13 and a second opening 14 are respectively provided at both ends of the limiting groove 11. The first opening 13 and the second opening 14 are both connected to the installation groove 12. The first opening 13 is provided on the side of the limiting groove 11 close to the middle column 22, and the second opening 14 is provided on the side of the limiting groove 11 away from the middle column 22, so as to facilitate the welding and disassembly between the coil 3 and the pin 4.

[0028] The specific installation process is as follows:

[0029] First, place the magnetic core 2 wound with coils 3 in different directions on the base 1, and align the coils 3 with the limiting grooves 11. The two ends of the two coils 3 correspond to the first opening 13 and the second opening 14 respectively. The end face of the magnetic core 2 presses the protrusion 53, and the protrusion 53 transmits the force to the clamping plate 51. The clamping plate 51 is deformed to move the protrusion 53 away from the magnetic core 2. When the clamping groove 21 and the protrusion 53 are in the same horizontal plane, the protrusion 53 is completely inserted into the clamping groove 21 under the action of the rebound force of the clamping plate 51, so as to achieve stable fixation between the magnetic core 2 and the base 1.

[0030] At this time, the terminal wires at both ends of the two coils 3 pass through the first opening 13 and the second opening 14 respectively, and the two ends of the coils 3 are welded to the pins 4 on the corresponding base 1 to complete the production of the differential common mode integrated inductor.

[0031] During the welding process, since the magnetic core 2 is stably fixed on the base 1 by the clamping device 5, the coil 3 is not easy to shake, thereby improving the welding accuracy and the stability of the product. In addition, the heat sink 54 in the clamping device 5 can effectively dissipate the heat generated by the inductor during operation, thereby improving the heat dissipation performance and service life of the inductor.

[0032] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A differential common mode integrated inductor, comprising a base (1), a magnetic core (2) being provided on the base (1), coils (3) being wound around both sides of the magnetic core (2), the two coils (3) being wound in opposite directions, pins (4) being connected to both ends of the coils (3), a plurality of pins (4) being provided at four corners of the base (1), characterized in that: A clamping device (5) is provided between the base (1) and the magnetic core (2), the clamping device (5) comprising at least two clamping plates (51), the two clamping plates (51) being provided at two ends of the base (1), clamping members being provided on the clamping plates (51), and clamping grooves (21) being provided at both ends of the magnetic core (2), the clamping grooves (21) being clamped and matched with the clamping members.

2. The differential and common mode integrated inductor according to claim 1, characterized in that: The clamping member comprises a fixing plate (52), the fixing plate (52) being fixedly arranged on the top of the clamping plate (51), and a protrusion (53) being provided at one end of the fixing plate (52) close to the magnetic core (2), the protrusion (53) being clamped and matched with the clamping groove (21).

3. The differential common mode integrated inductor according to claim 2, characterized in that: A plurality of heat dissipation plates (54) are provided in parallel at one end of the fixing plate (52) away from the magnetic core (2).

4. The differential and common mode integrated inductor according to claim 2, characterized in that: The fixing plate (52) is L-shaped.

5. The differential and common mode integrated inductor according to claim 1, characterized in that: The clamping member is made of aluminum alloy, and the clamping plate (51) is made of polyurethane.

6. The differential and common mode integrated inductor according to claim 1, characterized in that: There are four clamping plates (51), and the four clamping plates (51) are symmetrically arranged at two ends of the base (1).

7. The differential and common mode integrated inductor according to claim 1, characterized in that: The magnetic core (2) comprises two middle columns (22), the two middle columns (22) are arranged between the two coils (3), and a gap (23) is left between the two middle columns (22).

8. The differential and common mode integrated inductor according to claim 7, characterized in that: Limiting grooves (11) are provided on both sides of the base (1), and the coil (3) is supported in the limiting grooves (11).

9. The differential and common mode integrated inductor according to claim 8, characterized in that: The base (1) is provided with mounting grooves (12) at four corners, and the two ends of the limiting groove (11) are respectively provided with a first opening (13) and a second opening (14), the first opening (13) and the second opening (14) are both connected to the mounting groove (12), the first opening (13) is provided on a side of the limiting groove (11) close to the middle column (22), and the second opening (14) is provided on a side of the limiting groove (11) away from the middle column (22).

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