Differential mode and common mode integrated structure inductor and manufacturing method thereof

Abstract

The invention belongs to the technical field of electromagnetic interference, and discloses a differential mode and common mode integrated structure inductor and a manufacturing method thereof.The differential mode and common mode integrated structure inductor comprises a shell, a magnetic ring, a differential mode element and a first magnetic block, the shell comprises a bottom shell and a top cover, the top cover is detachably connected to the bottom shell, the bottom of the bottom shell is connected with two spaced hollow columns, and a groove is formed in the side, close to the bottom shell, of the top cover; the magnetic ring and the differential mode element are arranged in the bottom shell, the differential mode element and the two hollow columns are arranged in a hollow area of the magnetic ring in a penetrating mode, the differential mode element is clamped between the two hollow columns, the two opposite sides of the differential mode element abut against the inner wall of the magnetic ring, the first magnetic block is arranged in the bottom shell and inserted into the groove, and the bottom of the first magnetic block can abut against and cover the top of the differential mode element. One end of the first magnetic block is flush with the outer wall of the magnetic ring; the filter has excellent common-mode filtering characteristics and differential-mode filtering characteristics, meets the filtering requirements of working in a large-current or unbalanced-current environment, has good large-current-resistant and anti-saturation capability, and is simple in structure, small in size and low in manufacturing cost.

Description

Technical Field

[0001] The present invention relates to the field of electromagnetic interference technology, and in particular to a differential-mode and common-mode integrated structure inductor and a manufacturing method thereof. Background Art

[0002] With the rapid development of new energy power electronics technology, its supporting power modules, transmission conversion and other technologies have also undergone great innovation. With the miniaturization and high current of efficient integrated power module devices, many electromagnetic interference (EMI) and electromagnetic compatibility (EMC) problems have also been caused. Common mode interference signals and differential mode interference signals coexist in related transmission lines, which will have a serious impact on the stability of the entire power supply and the normal operation of related components. As the most critical filter inductor magnetic component in the power conversion process of the power supply, it has a good filtering effect on ripple and clutter interference performance. However, due to the coexistence of common mode interference signals and differential mode interference signals in the transmission line, it is necessary to simultaneously connect common mode filter inductors and differential mode filter inductors to reduce or suppress common mode and differential mode interference signals to meet the requirements of electromagnetic compatibility (EMC), which makes it impossible to meet miniaturization.

[0003] The prior art provides an inductor that has a good filtering effect on both common-mode and differential-mode interference signals. It can effectively reduce or suppress common-mode and differential-mode interference signals under low-current working conditions. However, when working under large unbalanced currents, the filtering effect on common-mode / differential-mode interference signals is prone to failure.

[0004] Therefore, a device is urgently needed to solve the above problems. Summary of the invention

[0005] The purpose of the present invention is to provide a differential-mode and common-mode integrated structure inductor, which has excellent common-mode filtering and differential-mode filtering performance, can meet the filtering requirements of working in a large current or unbalanced current environment, and has a simple structure, small size and low production cost.

[0006] To achieve this object, the present invention adopts the following technical solutions:

[0007] Differential mode and common mode integrated structure inductor, including:

[0008] A shell, the shell comprising a bottom shell and a top cover, the top cover is detachably connected to the bottom shell, the bottom of the bottom shell is connected to two hollow columns, the two hollow columns are arranged at intervals, and a groove is arranged on one side of the top cover close to the bottom shell;

[0009] A magnetic ring, wherein the magnetic ring is disposed in the bottom shell, and the two hollow columns are disposed through a hollow area of ​​the magnetic ring;

[0010] A differential mode element is disposed in the bottom shell and penetrates the hollow area of ​​the magnetic ring, the differential mode element is sandwiched between the two hollow columns, and opposite sides of the differential mode element abut against the inner wall of the magnetic ring;

[0011] The first magnetic block is arranged in the bottom shell and inserted in the groove, the bottom of the first magnetic block can abut against and cover the top of the differential mode element, and one end of the first magnetic block is flush with the outer wall of the magnetic ring.

[0012] Preferably, two ends of the first magnetic block are flush with the outer wall of the magnetic ring respectively.

[0013] Preferably, the top of the differential mode element is slightly higher than the magnetic ring, and air gaps are respectively provided between the two ends of the first magnetic block in the length direction and the top of the magnetic ring, and the air gaps are respectively in contact with the first magnetic block and the magnetic ring.

[0014] Preferably, the groove is provided on a side of the bottom shell close to the top cover.

[0015] Preferably, two first magnetic blocks are included, and the two first magnetic blocks are respectively inserted into the two grooves, and the top of one of the first magnetic blocks can abut against and cover the bottom of the differential mode element.

[0016] Preferably, the bottom of the differential mode element is slightly lower than the magnetic ring, and air gaps are respectively provided between two ends of one of the first magnetic blocks in the length direction and the bottom of the magnetic ring, and the air gaps are respectively in contact with the first magnetic block and the magnetic ring.

[0017] Preferably, the differential mode element comprises two second magnetic blocks which are inverted upside down, and the second magnetic blocks are of a right-angled trapezoidal structure, the two inclined surfaces of the two second magnetic blocks are in contact with each other, and the sides of the two second magnetic blocks which are away from each other abut against the inner wall of the magnetic ring.

[0018] Preferably, at least two raised ribs are spaced apart on one side of the two hollow columns close to each other, and the raised ribs press against the differential mode element.

[0019] Preferably, the sides of the two hollow columns facing away from each other are pressed against the inner wall of the magnetic ring, and the outer wall of the magnetic ring is bonded to the bottom shell.

[0020] Another object of the present invention is to provide a method for manufacturing a differential-mode common-mode integrated structure inductor, which is simple to manufacture and has low production cost.

[0021] To achieve this object, the present invention adopts the following technical solutions:

[0022] The method for manufacturing a differential-mode common-mode integrated structure inductor is used to manufacture the above-mentioned differential-mode common-mode integrated structure inductor, comprising the following steps:

[0023] S1, making the magnetic ring;

[0024] S2, making the first magnetic block and the second magnetic block;

[0025] S3, assembling the magnetic ring, the first magnetic block, the second magnetic block and the air gap sheet into a magnetic core assembly;

[0026] S4. Place the magnetic core assembly in the bottom shell and connect the top cover.

[0027] Beneficial effects: The present invention provides a differential-mode and common-mode integrated structure inductor, comprising a shell, a magnetic ring, a differential-mode element and a first magnetic block, the shell comprising a bottom shell and a top cover, the top cover is detachably connected to the bottom shell, the bottom of the bottom shell is connected to two hollow columns, the two hollow columns are arranged at intervals, the circuit can pass through the bottom shell, the two hollow columns and the top cover, a groove is arranged on one side of the top cover close to the bottom shell, the magnetic ring is arranged in the bottom shell, and the two hollow columns are arranged in the hollow area of ​​the magnetic ring, the differential-mode element is arranged in the bottom shell and in the hollow area of ​​the magnetic ring, the differential-mode element is sandwiched between the two hollow columns, and the opposite sides of the differential-mode element are against The inner wall of the magnetic ring is connected, the first magnetic block is arranged in the bottom shell and inserted in the groove, the bottom of the first magnetic block can abut and cover the top of the differential mode element, and one end of the first magnetic block is flush with the outer wall of the magnetic ring; the differential mode and common mode integrated structure inductor provided by the present invention has excellent common mode filtering characteristics and excellent differential mode filtering characteristics, meets the electromagnetic compatibility filtering requirements working in a large current or unbalanced current environment, has good large current resistance and anti-saturation ability, and has a simple structure, small size and low production cost; the present invention also provides a differential mode and common mode integrated structure inductor The method for making the method is simple to make and has low production cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 is a decomposed structural diagram of a differential-mode and common-mode integrated structure inductor provided by an embodiment of the present invention;

[0029] Figure 2 It is a structural schematic diagram of a bottom shell of a differential-mode and common-mode integrated structure inductor provided by an embodiment of the present invention;

[0030] Figure 3 It is a schematic structural diagram of a top cover of a differential-mode and common-mode integrated structure inductor provided in an embodiment of the present invention;

[0031] Figure 4 It is a schematic structural diagram of a magnetic ring of a differential-mode and common-mode integrated structure inductor provided in an embodiment of the present invention;

[0032] Figure 5is a schematic diagram of the combination of two second magnetic blocks of the differential-mode and common-mode integrated structure inductor provided by an embodiment of the present invention;

[0033] Figure 6 is a schematic structural diagram of a first magnetic block of a differential-mode and common-mode integrated structure inductor provided in an embodiment of the present invention;

[0034] Figure 7 1 is a schematic structural diagram of an air gap sheet of a differential-mode and common-mode integrated structure inductor provided in an embodiment of the present invention;

[0035] Figure 8 FIG. 1 is a partial structural diagram of a differential mode and common mode integrated structure inductor provided in an embodiment of the present invention. Figure 1 ;

[0036] Fig. 9 FIG. 1 is a partial structural diagram of a differential mode and common mode integrated structure inductor provided in an embodiment of the present invention. Figure 2 ;

[0037] Fig.10 FIG. 1 is a partial structural diagram of a differential mode and common mode integrated structure inductor provided in an embodiment of the present invention. Figure 3 ;

[0038] Fig.11 FIG. 1 is a partial structural diagram of a differential mode and common mode integrated structure inductor provided in an embodiment of the present invention. Figure 4 .

[0039] In the figure:

[0040] 10. Groove; 11. Bottom shell; 111. Card slot; 12. Top cover; 121. Buckle; 2. Magnetic ring; 3. First magnetic block; 4. Second magnetic block; 5. Hollow column; 51. Raised rib; 6. Air gap sheet. DETAILED DESCRIPTION

[0041] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0042] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0043] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0044] In the description of this embodiment, the terms "upper", "lower", "right", etc., directions or positional relationships are based on the directions or positional relationships shown in the drawings, and are only for the convenience of description and simplification of operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0045] Embodiment 1

[0046] This embodiment provides a differential-mode and common-mode integrated structure inductor, which has very high common-mode filtering characteristics and very high differential-mode filtering characteristics, is particularly suitable for EMC filtering requirements working in large current or unbalanced current environments, has good high current resistance and anti-saturation capability, and has a simple structure, small size, and low manufacturing cost.

[0047] like Figure 1 As shown, the differential-mode and common-mode integrated structure inductor includes a shell, a magnetic ring 2, a differential-mode element and a first magnetic block 3, wherein the magnetic ring 2, the differential-mode element and the first magnetic block 3 are all arranged inside the shell to play a fixing and protective role. Specifically, the magnetic ring 2 can play a role in common-mode filtering, the differential-mode element is passed through the hollow area of ​​the magnetic ring 2, and can play a role in differential-mode filtering, and the first magnetic block 3 plays a role in increasing the resistance to saturation current and improving the differential-mode filtering function.

[0048] Specifically, the housing includes a bottom shell 11 and a top cover 12, and both the bottom shell 11 and the top cover 12 are made of high temperature resistant plastic to obtain insulation performance. Figure 2 As shown, the bottom shell 11 is configured as a hollow structure with one end open, and the top cover 12 is detachably connected to the open end of the bottom shell 11. Optionally, a slot 111 is circumferentially provided at the open end of the bottom shell 11. Figure 3 As shown, the top cover 12 is provided with a buckle 121, and the buckle 121 can be locked in the slot 111, thereby realizing a detachable connection between the top cover 12 and the bottom shell 11, and the connection is stable.

[0049] Furthermore, two first through holes are provided on the bottom shell 11 at intervals. Figure 2 , and the edges of the two first through holes are connected with a hollow column 5. It can be understood that two second through holes are correspondingly spaced apart on the top cover 12, and the circuit can pass through the first through hole, the hollow column 5 and the second through hole, thereby realizing the series connection of the differential mode and common mode integrated structure inductor into the circuit. In this embodiment, the ends of the two hollow columns 5 away from the bottom shell 11 are respectively in contact with the edges of the two second through holes to improve the smoothness of the series connection of the differential mode and common mode integrated structure inductor into the circuit.

[0050] Preferably, if Figure 4 As shown, the magnetic ring 2 is formed by winding a strip material, and the commonly used strip materials include Fe-based amorphous nanocrystalline alloy, Co-based amorphous alloy, FeNi-based amorphous alloy materials, etc. After the assembly is completed, the two hollow columns 5 connected to the bottom shell 11 are arranged in the hollow area of ​​the magnetic ring 2. Further preferably, as Fig.11 As shown, the outer wall of the magnetic ring 2 is attached to the inner wall of the bottom shell 11, and glue (epoxy resin, organic silicone, polyurethane glue) is used to bond the outer wall of the magnetic ring 2 and the inner wall of the bottom shell 11 to prevent shaking during operation and affecting performance stability.

[0051] Furthermore, if Figures 8 to 11 As shown, the differential mode element is passed through the hollow area of ​​the magnetic ring 2, and the differential mode element is clamped between two hollow columns 5, and its two opposite sides are pressed against the inner wall of the magnetic ring 2 to improve the stability of the differential mode element and prevent it from shaking during operation.

[0052] The differential mode element provided in this embodiment includes two second magnetic blocks 4, both of which are sandwiched between two hollow pillars 5, and the two second magnetic blocks 4 are both in contact with the inner wall of the magnetic ring 2 on one side away from each other. Specifically, the second magnetic blocks 4 are of a right-angled trapezoidal structure, such as Figure 5 As shown, the two second magnetic blocks 4 are inverted upside down, and the inclined surfaces of the two second magnetic blocks 4 are matched and fitted together. Finally, the two second magnetic blocks 4 are inserted into the magnetic ring 2. In order to prevent the inner wall of the magnetic ring 2 from being damaged during the assembly process, the inner wall of the magnetic ring 2 provided in this embodiment is a quadrilateral, and the two opposite sides are parallel. By designing the two second magnetic blocks 4 as a right-angled trapezoidal structure and inverting them upside down and then fitting them together, when the magnetic core assembly is impacted by external force, the two second magnetic blocks 4 can squeeze each other, thereby making the contact between the second magnetic block 4 and the magnetic ring 2 closer, which can reduce the magnetic resistance caused by the different materials of the magnetic ring 2 and the second magnetic block 4, and can also reduce the probability of magnetic leakage at the contact point.

[0053] Preferably, the second magnetic block 4 is made of magnetic powder, and commonly used magnetic powders include carbonyl iron powder, FeSi powder, FeSiAl powder, FeNi powder, FeNiMo powder and the like.

[0054] Preferably, if Figure 2 As shown, at least two raised ribs 51 are arranged at intervals on one side of the two hollow columns 5 close to each other, and the two raised ribs 51 on one hollow column 5 can respectively press against the same side of the two second magnetic blocks 4, and the two raised ribs 51 on the other hollow column 5 can respectively press against the opposite side of the second magnetic block 4 of the beam, thereby limiting and fixing the two second magnetic blocks 4 and further improving the structural strength of the magnetic core assembly.

[0055] In this embodiment, two first magnetic blocks 3 are provided, specifically, as Figure 6 and Fig.10 As shown, the two first magnetic blocks 3 respectively abut and cover the top and bottom of the two second magnetic blocks 4, and both ends of the first magnetic block 3 in the length direction are flush with the outer wall of the magnetic ring 2. Therefore, during the operation, part of the induced magnetic flux in the second magnetic block 4 can be guided and diverted to enter the first magnetic block 3 first, and then evenly guided to each layer of the magnetic ring 2 through the first magnetic block 3 to form a loop, which greatly reduces the magnetic resistance of the induced magnetic flux in the second magnetic block 4 to the magnetic ring 2, and avoids the induced magnetic flux being limited to the inner ring layer of the magnetic ring 2 due to the high magnetic resistance of the induced magnetic flux crossing the magnetic ring 2, thereby ensuring the uniform distribution of the induced magnetic flux inside the magnetic ring 2, and preventing the inner ring of the magnetic ring 2 from being saturated prematurely when operating in a large current environment, resulting in abnormal heating, thereby avoiding the problem of failure of the common mode filtering function and the differential mode filtering function.

[0056] Preferably, the first magnetic block 3 is also made of magnetic powder. Commonly used magnetic powders include carbonyl iron powder, FeSi powder, FeSiAl powder, FeNi powder, FeNiMo powder and the like.

[0057] Adaptively, in this embodiment, grooves 10 are provided on one side of the top cover 12 close to the bottom shell 11 and on one side of the bottom shell 11 close to the top cover 12, and the two first magnetic blocks 3 are respectively inserted into the two grooves 10 to limit and fix the two first magnetic blocks 3. Preferably, the two first magnetic blocks 3 are respectively bonded to the two grooves 10 to improve the stability of the differential mode and common mode integrated structure inductor, thereby affecting the performance stability. For example, epoxy resin, organic silicone or polyurethane glue can be used.

[0058] In other feasible embodiments, one end of the first magnetic block 3 may be arranged flush with the outer wall of the magnetic ring 2. Similarly, during operation, part of the induced magnetic flux in the second magnetic block 4 may be guided and diverted to first enter the first magnetic block 3, and then evenly guided to each layer of the magnetic ring 2 through the first magnetic block 3, thereby ensuring that the induced magnetic flux inside the magnetic ring 2 is evenly distributed.

[0059] In other feasible embodiments, only one first magnetic block 3 may be provided, and the first magnetic block 3 is abutted against and covers the top / bottom of the two second magnetic blocks 4, and at least one end of the first magnetic block 3 in the length direction is provided flush with the outer wall of the magnetic ring 2. Similarly, during operation, part of the induced magnetic flux in the second magnetic block 4 can be guided and diverted to first enter the first magnetic block 3, and then evenly guided to each layer of the magnetic ring 2, thereby ensuring that the induced magnetic flux inside the magnetic ring 2 is evenly distributed, thereby improving the common-mode filtering function and differential-mode filtering function of the structure.

[0060] Preferably, in order to ensure the differential mode filtering function of the differential mode and common mode integrated structure inductor under the operating environment of high frequency current, unbalanced current or differential mode interference current, the height of the two second magnetic blocks 4 is set slightly higher than the magnetic ring 2, and the first magnetic block 3 abuts and covers the top of the two second magnetic blocks 4. Specifically, the bottom of the two second magnetic blocks 4 is flush with the bottom of the magnetic ring 2, and the top of the two second magnetic blocks 4 is slightly higher than the top of the magnetic ring 2. Exemplarily, the top of the second magnetic block 4 is 1-5mm higher than the magnetic ring. At this time, there is a gap between at least one end of the first magnetic block 3 and the magnetic ring 2, and an air gap sheet 6 is placed in the gap, so that the air gap sheet 6 abuts against the first magnetic block 3 and the magnetic ring 2 respectively, so as to prevent the first magnetic block 3 from tilting, thereby indirectly improving the structure's ability to withstand large currents and resist saturation and the differential mode filtering performance.

[0061] Preferably, the tops of the two second magnetic blocks 4 can be arranged flush with the top of the magnetic ring 2, and the bottoms of the two second magnetic blocks 4 can be slightly lower than the bottom of the magnetic ring 2. The first magnetic block 3 abuts against and covers the bottoms of the two second magnetic blocks 4. Exemplarily, the bottom of the second magnetic block 4 is 1-5 mm lower than the magnetic ring. At this time, there is a gap between at least one end of the first magnetic block 3 and the magnetic ring 2. An air gap piece 6 is arranged in the gap so that the air gap piece 6 abuts against the first magnetic block 3 and the magnetic ring 2 respectively, thereby preventing the first magnetic block 3 from tilting, and indirectly improving the structure's ability to withstand large currents and resist saturation, as well as differential mode filtering performance.

[0062] like Figures 7 to 11 As shown, in this embodiment, the tops of the two second magnetic blocks 4 are slightly higher than the top of the magnetic ring 2, and the bottoms of the two second magnetic blocks 4 are slightly lower than the bottom of the magnetic ring 2. The two first magnetic blocks 3 respectively abut and cover the tops and bottoms of the two second magnetic blocks 4. The tops of the second magnetic blocks 4 are 1-5mm higher than the magnetic ring, and the bottoms of the second magnetic blocks 4 are 1-5mm lower than the magnetic ring. At this time, there is a gap between at least one end of one of the first magnetic blocks 3 and the top of the magnetic ring 2, and an air gap piece 6 is arranged in this gap, so that the air gap piece 6 abuts against the bottom of the first magnetic block 3 and the magnetic ring 2 respectively. There is a gap between at least one end of the other first magnetic block 3 and the bottom of the magnetic ring 2, and an air gap piece 6 is arranged in this gap, so that the air gap piece 6 abuts against the top of the first magnetic block 3 and the magnetic ring 2 respectively.

[0063] Optionally, the air gap sheet 6 is a FR-4 epoxy board, a common epoxy board, a PET hard plastic board, a rubber sheet, NOMEX or an insulating paper.

[0064] The present embodiment provides both common-mode filtering and differential-mode filtering performance, can meet the filtering requirements of working in a large current or unbalanced current environment, and has a simple structure, small size, and low manufacturing cost.

[0065] Embodiment 2

[0066] This embodiment provides a method for manufacturing a differential-mode and common-mode integrated structure inductor, which is used to manufacture the differential-mode and common-mode integrated structure inductor, and includes the following steps:

[0067] S1, making the magnetic ring 2;

[0068] S2, making the first magnetic block 3 and the second magnetic block 4;

[0069] S3, assembling the magnetic ring 2, the first magnetic block 3, the second magnetic block 4 and the air gap sheet 6 into a magnetic core assembly;

[0070] S4, placing the magnetic core assembly in the bottom shell 11 and connecting the top cover 12.

[0071] Specifically, in S1, the strip is first wound into a ring shape. The strip material can be Fe-based amorphous nanocrystalline alloy, Co-based amorphous alloy, FeNi-based amorphous alloy material, etc. After obtaining the ring-shaped strip, it is fixed and adjusted into the required structural shape through a special molding fixture. For example, it is adjusted to a quadrilateral inner wall, and the relative side walls are parallel to each other. Then, it is crystallized in a heat treatment furnace at a certain temperature and time. For example, the temperature is set between 500-600°C and the time is between 30-360min. In this process, a certain transverse magnetic field and / or longitudinal magnetic field can be applied according to performance requirements. The magnetic field strength is between 800Gs-2000Gs to improve the saturation magnetic induction intensity, resistivity, magnetic permeability and other properties, thereby improving its common mode filtering function.

[0072] In S2, the first magnetic block 3 and the second magnetic block 4 are both formed by molding pre-coated magnetic powder. Commonly used magnetic powders include carbonyl iron powder, FeSi powder, FeSiAl powder, FeNi powder, FeNiMo powder, etc., and then annealing treatment is performed under a certain temperature and environment. For example, the temperature is set between 400-1200°C in an inert environment or a reducing environment, thereby improving its differential mode filtering function.

[0073] In S3, first, the two second magnetic blocks 4 are turned upside down and pressed against the inner wall of the magnetic ring 2, and the two are inserted into the hollow area of ​​the magnetic ring 2, so that the tops of the two second magnetic blocks 4 are slightly higher than the top of the magnetic ring 2 by 1-5 mm, and the bottoms of the two second magnetic blocks 4 are slightly lower than the bottom of the magnetic ring 2 by 1-5 mm. Further, the two first magnetic blocks 3 are respectively abutted against and cover the tops and bottoms of the two second magnetic blocks 4, and an air gap piece 6 is placed in the gap between at least one end of one of the first magnetic blocks 3 and the top of the magnetic ring 2, so that the air gap piece 6 is respectively abutted against the bottom of the first magnetic block 3 and the magnetic ring 2, and an air gap piece 6 is placed in the gap between at least one end of the other first magnetic block 3 and the bottom of the magnetic ring 2, so that the air gap piece 6 is respectively abutted against the top of the first magnetic block 3 and the magnetic ring 2.

[0074] In S4, the assembled magnetic core assembly is placed in the bottom shell 11, the outer wall of the magnetic ring 2 is attached to the inner wall of the bottom shell 11, and glue (epoxy resin, organic silicone, polyurethane glue) is used to bond the outer wall of the magnetic ring 2 and the inner wall of the bottom shell 11 to prevent it from shaking during operation, and the first magnetic block 3 below is inserted into the groove 10 set in the bottom shell 11, and the first magnetic block 3 is bonded to the groove 10 to prevent the first magnetic block 3 from shifting. Further, the two second magnetic blocks 4 are clamped between the two hollow columns 5. The two raised ribs 51 on one of the hollow columns 5 are respectively pressed against the same side of the two second magnetic blocks 4, and the two raised ribs 51 on the other hollow column 5 are respectively pressed against the opposite side of the second magnetic block 4 of the beam to limit and fix the second magnetic block 4, use the top cover 12 to cover the open end of the bottom shell 11, and insert the upper first magnetic block 3 into the groove 10 set in the bottom shell 11, and bond the first magnetic block 3 into the groove 10 to prevent the first magnetic block 3 from shifting, and finally, clamp the buckle 121 in the slot 111.

[0075] The manufacturing method of the differential-mode and common-mode integrated structure inductor provided in this embodiment is simple to manufacture and has low production cost.

[0076] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. For those skilled in the art, various obvious changes, readjustments and substitutions can be made without departing from the protection scope of the present invention. It is not necessary and impossible to list all the embodiments here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. Differential mode and common mode integrated structure inductor, characterized in that: include: A shell, the shell comprising a bottom shell (11) and a top cover (12), the top cover (12) being detachably connected to the bottom shell (11), two hollow columns (5) being connected to the bottom of the bottom shell (11), the two hollow columns (5) being arranged at intervals, and a groove (10) being arranged on a side of the top cover (12) close to the bottom shell (11); A magnetic ring (2), the magnetic ring (2) being arranged in the bottom shell (11), and the two hollow columns (5) being arranged through the hollow area of ​​the magnetic ring (2); A differential mode element is arranged in the bottom shell (11) and penetrates the hollow area of ​​the magnetic ring (2), the differential mode element is sandwiched between the two hollow columns (5), and the opposite sides of the differential mode element abut against the inner wall of the magnetic ring (2); A first magnetic block (3) is arranged in the bottom shell (11) and inserted into the groove (10); the bottom of the first magnetic block (3) can abut against and cover the top of the differential mode element; one end of the first magnetic block (3) is flush with the outer wall of the magnetic ring (2).

2. The differential mode and common mode integrated structure inductor according to claim 1, characterized in that: Two ends of the first magnetic block (3) are respectively flush with the outer wall of the magnetic ring (2).

3. The differential mode and common mode integrated structure inductor according to claim 2, characterized in that: The top of the differential mode element is slightly higher than the magnetic ring (2); air gap sheets (6) are respectively arranged between the two ends of the first magnetic block (3) in the length direction and the top of the magnetic ring (2); and the air gap sheets (6) are respectively in contact with the first magnetic block (3) and the magnetic ring (2).

4. The differential mode and common mode integrated structure inductor according to claim 2, characterized in that: The groove (10) is provided on a side of the bottom shell (11) close to the top cover (12).

5. The differential mode and common mode integrated structure inductor according to claim 4, characterized in that: It comprises two first magnetic blocks (3), the two first magnetic blocks (3) are respectively inserted into the two grooves (10), and the top of one of the first magnetic blocks (3) can abut against and cover the bottom of the differential mode element.

6. The differential mode and common mode integrated structure inductor according to claim 5, characterized in that: The bottom of the differential mode element is slightly lower than the magnetic ring (2), and air gap sheets (6) are respectively arranged between the two ends of one of the first magnetic blocks (3) in the length direction and the bottom of the magnetic ring (2), and the air gap sheets (6) are respectively in contact with the first magnetic block (3) and the magnetic ring (2).

7. The differential mode and common mode integrated structure inductor according to claim 1, characterized in that: The differential mode element comprises two second magnetic blocks (4) which are inverted upside down, and the second magnetic blocks (4) are of a right-angled trapezoidal structure, the two inclined surfaces of the two second magnetic blocks (4) are in contact with each other, and the sides of the two second magnetic blocks (4) facing away from each other are both in contact with the inner wall of the magnetic ring (2).

8. The differential mode and common mode integrated structure inductor according to claim 1, characterized in that: At least two raised ribs (51) are arranged at intervals on one side of the two hollow columns (5) close to each other, and the raised ribs (51) are pressed against the differential mode element.

9. The differential mode and common mode integrated structure inductor according to claim 1, characterized in that: The sides of the two hollow columns (5) facing away from each other are both pressed against the inner wall of the magnetic ring (2), and the outer wall of the magnetic ring (2) is bonded to the bottom shell (11).

10. A method for manufacturing a differential mode and common mode integrated structure inductor, characterized in that: The method for manufacturing the differential-mode and common-mode integrated structure inductor according to any one of claims 1 to 9 comprises the following steps: S1, manufacturing the magnetic ring (2); S2, manufacturing the first magnetic block (3) and the second magnetic block (4); S3, assembling the magnetic ring (2), the first magnetic block (3), the second magnetic block (4) and the air gap sheet (6) into a magnetic core assembly; S4. Place the magnetic core assembly in the bottom shell (11) and connect the top cover (12).

Images