Novel differential and common mode integrated magnetic combined inductor

Abstract

The utility model discloses a novel differential and common mode integrated magnetic combined inductor which comprises a base, a Y-shaped magnetic core, a magnetic ring assembly and three groups of coils, wherein the Y-shaped magnetic core, the magnetic ring assembly and the three groups of coils are arranged on the base; the magnetic ring assembly comprises a nanocrystalline ring, a silicon steel sheet ring arranged on the inner side of the nanocrystalline ring, an insulating sheet clamped between the nanocrystalline ring and the silicon steel sheet ring, and a lantern ring wrapping the nanocrystalline ring, the silicon steel sheet ring and the insulating sheet. The Y-shaped magnetic core is arranged on the inner side of the magnetic ring assembly, and the distances from the Y-shaped magnetic core to the silicon steel sheet ring are equal; the Y-shaped magnetic core divides the magnetic ring assembly into three magnetic strip areas, and the three sets of coils are wound on the magnetic strip areas respectively. According to the utility model, the nanocrystalline ring and the silicon steel sheet ring are combined in the lantern ring, so that the occupied space can be effectively reduced. Moreover, the common-mode inductor and the differential-mode electromagnetic inductor are integrated together and designed into one product, so that compared with two independent products, the production steps and materials can be effectively reduced, and the cost is effectively saved.

Description

Technical Field

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

[0002] The existing solution is to physically separate common-mode and differential-mode inductors (using two inductors). This means that the common-mode inductor only improves EMI, while the differential-mode inductor only filters; they have no other functions. When both common-mode and differential-mode inductors are needed, two products are required (one common-mode inductor and one differential-mode inductor), which inevitably leads to a larger footprint and is not conducive to cost savings.

[0003] Therefore, the existing technology has defects and needs to be improved. Utility Model Content

[0004] The technical problem to be solved by the present invention is to provide a new differential and common mode integrated magnetic combination inductor, which integrates the common mode inductor and the differential mode electromagnetic inductor into one product and applies it to a specific circuit, thereby achieving the dual functions of improving EMI (common mode) and filtering (differential mode).

[0005] The technical solution of the utility model is as follows: a novel differential and common mode integrated magnetic combination inductor is provided, comprising: a base, a Y-shaped magnetic core, a magnetic ring assembly, and three groups of coils installed on the base; the magnetic ring assembly comprises: a nanocrystalline ring, a silicon steel sheet ring arranged on the inner side of the nanocrystalline ring, an insulating sheet sandwiched between the nanocrystalline ring and the silicon steel sheet ring, and a collar that wraps the nanocrystalline ring, the silicon steel sheet ring, and the insulating sheet; the Y-shaped magnetic core is arranged on the inner side of the magnetic ring assembly, and the distance between the Y-shaped magnetic core and the silicon steel sheet ring is equal; the Y-shaped magnetic core divides the magnetic ring assembly into three magnetic strip areas, and the three groups of coils are respectively wound on one magnetic strip area.

[0006] The base is used to support the Y-shaped magnetic core, the magnetic ring assembly and the coil; the Y-shaped magnetic core is designed to be Y-shaped so that the three-phase differential mode inductance is consistent and the three-phase balance is achieved; different materials can be selected according to different operating frequencies and differential mode inductances, such as ferrite, iron silicon and silicon steel sheets, as well as different Y-shaped magnetic core sizes, to achieve the purpose of achieving differential mode inductance.

[0007] The silicon steel ring is combined with the Y-shaped magnetic core to form the magnetic circuit of the differential mode inductor. By adjusting the cross-sectional area of ​​the silicon steel ring, the differential mode inductance can be changed. By adjusting the size of the air gap with the Y-shaped magnetic core, the load inductance of the differential mode inductor and the power of the differential mode inductor can be increased, thereby changing the filtering effect of the differential mode inductor.

[0008] The insulating sheet is used to isolate the silicon steel sheet ring from the nanocrystalline ring, and at the same time increase the air gap between the silicon steel sheet ring and the Y-shaped magnetic core, ensuring that the silicon steel sheet ring is not saturated in the differential mode, thereby making the differential mode inductance more stable and the filtering effect better.

[0009] The nanocrystalline ring is used to generate common mode inductance to improve EMI in the entire circuit. The size of this inductance and impedance directly affect the overall EMI effect, so when designing the nanocrystalline ring, nanocrystalline materials with high magnetic permeability and high impedance are used as much as possible.

[0010] Furthermore, the sleeve ring includes an upper cover and a lower cover that cooperates with the upper cover. The lower cover is used to support the silicon steel sheet ring, the insulating sheet, and the nanocrystalline ring, and is used in conjunction with the upper cover. The upper cover is used to enclose the silicon steel sheet ring, the insulating sheet, and the nanocrystalline ring, and is used in conjunction with the lower cover. The upper and lower covers are both made of high-temperature resistant, high-strength FR530 injection molding material, which can protect the silicon steel sheet ring and the nanocrystalline ring from damage due to external forces and ensure that the relevant electrical properties of the silicon steel sheet ring and the nanocrystalline ring are not changed due to external forces, thereby making the performance of the entire product more stable.

[0011] Furthermore, the base includes: a bottom plate, a Y-shaped seat connected to the bottom plate, and an inner baffle connected to the Y-shaped seat; the Y-shaped seat and the inner baffle form an inner Y-shaped groove, and the Y-shaped magnetic core is arranged in the inner Y-shaped groove.

[0012] Furthermore, the magnetic ring assembly is placed on the Y-shaped seat.

[0013] Furthermore, the pins of the coil pass through the bottom plate and are fixed to the bottom plate by glue, wherein the glue is epoxy resin.

[0014] Furthermore, the bottom plate is provided with a coil slot, and the coil passes through or faces the coil slot.

[0015] Furthermore, the coil is made of vertically wound flat copper wire. This high-temperature-resistant wire is directly wound around the magnetic ring assembly, facilitating automated production. The inner silicon steel ring and nanocrystalline ring are unaffected by stress, resulting in more stable product performance. The flat copper wire provides enhanced heat dissipation and lowers temperature rise. For a given volume, the vertically wound method delivers greater power.

[0016] Furthermore, the Y-shaped magnetic core is connected to the collar by glue, and the glue is epoxy resin.

[0017] By adopting the above solution, the utility model provides a novel differential and common mode integrated magnetic combination inductor, which has the following technical effects:

[0018] (1) It adopts flat copper wire vertical winding. By designing different conductor areas of copper wire, the power can reach 0W-500KW, and can withstand 0A-350A current, which makes it easy to realize automatic winding.

[0019] (2) The magnetic ring assembly uses silicon steel sheet rings and nanocrystalline rings to support the differential mode and common mode inductors. Combining the silicon steel sheet rings and nanocrystalline rings in the ring can effectively reduce space occupation. Moreover, since the common mode inductor and the differential mode electromagnetic are integrated into one product, compared with two independent products, it can effectively reduce the production steps and materials, effectively saving costs.

[0020] (3) The base adopts a tray-like structure to fix the annular magnetic ring assembly and the Y-shaped magnetic core on the base. At the same time, the base is made of high-temperature resistant 155℃ FR530 material, which can withstand high temperatures and adapt to relatively harsh working environments.

[0021] (4) The fixing glue adopts epoxy resin which is resistant to high temperature, has high bonding strength, strong shear force and low stress, and can be used in harsh environments. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a schematic structural diagram of an embodiment of the present utility model;

[0023] Figure 2 for Figure 1 Exploded view of an embodiment. DETAILED DESCRIPTION

[0024] The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0025] See also Figure 1 and Figure 2 This embodiment provides a novel differential and common mode integrated magnetic combination inductor, comprising: a base, a Y-shaped magnetic core 10 mounted on the base, a magnetic ring assembly, and three groups of coils 11; the magnetic ring assembly comprises: a nanocrystalline ring 12, a silicon steel sheet ring 13 arranged inside the nanocrystalline ring 12, an insulating sheet 14 sandwiched between the nanocrystalline ring 12 and the silicon steel sheet ring 13, and a ring wrapping the nanocrystalline ring 12, the silicon steel sheet ring 13, and the insulating sheet 14; the Y-shaped magnetic core 10 is arranged inside the magnetic ring assembly, and the distance between the Y-shaped magnetic core 10 and the silicon steel sheet ring 13 is equal; the Y-shaped magnetic core 10 divides the magnetic ring assembly into three magnetic strip areas, and the three groups of coils 11 are respectively wound on one magnetic strip area.

[0026] The base is used to support the Y-shaped magnetic core 10, the magnetic ring assembly and the coil 11; the Y-shaped magnetic core 10 is designed to be Y-shaped so that the three-phase differential mode inductance is consistent and the three-phase balance is achieved; different materials can be selected according to different operating frequencies and differential mode inductances, such as ferrite, iron silicon and silicon steel sheets, and different sizes of the Y-shaped magnetic core 10 can be selected to achieve the purpose of achieving differential mode inductance.

[0027] The silicon steel ring 13 is combined with the Y-shaped magnetic core 10 to form the magnetic circuit of the differential mode inductor. By adjusting the cross-sectional area of ​​the silicon steel ring 12, the differential mode inductance can be changed. By adjusting the size of the air gap with the Y-shaped magnetic core 10, the loaded inductance of the differential mode inductor and the power of the differential mode inductor can be increased, thereby changing the filtering effect of the differential mode inductor.

[0028] The insulating sheet 14 is used to isolate the nanocrystalline ring 12 from the silicon steel ring 13, and at the same time increase the air gap between the silicon steel ring 13 and the Y-shaped magnetic core 10, ensuring that the silicon steel ring 13 is not saturated in the differential mode, thereby making the differential mode inductance more stable and the filtering effect better.

[0029] The nanocrystalline ring 12 is used to generate common mode inductance to improve EMI in the entire circuit. The size of this inductance and impedance directly affect the overall EMI effect, so when designing the nanocrystalline ring 12, nanocrystalline materials with high magnetic permeability and high impedance are used as much as possible.

[0030] In this embodiment, the sleeve ring includes: an upper cover 15, and a lower cover 16 that cooperates with the upper cover 15. The lower cover 16 is used to support the nanocrystalline ring 12, the insulating sheet 14, and the silicon steel sheet ring 13, and is used in conjunction with the upper cover 15. The upper cover 15 is used to enclose the nanocrystalline ring 12, the insulating sheet 14, and the silicon steel sheet ring 13, and is used in conjunction with the lower cover 16. The upper cover 15 and the lower cover 16 are both made of high-temperature resistant, high-strength FR530 injection molding material, which can protect the nanocrystalline ring 12 and the silicon steel sheet ring 13 from being damaged by external forces and ensure that the relevant electrical properties of the nanocrystalline ring 12 and the silicon steel sheet ring 13 will not be changed due to external forces, thereby making the performance of the entire product more stable.

[0031] In this embodiment, the base includes: a bottom plate 17, a Y-shaped seat 18 connected to the bottom plate 17, and an inner baffle 19 connected to the Y-shaped seat 18; the Y-shaped seat 18 and the inner baffle 19 form an inner Y-shaped groove, and the Y-shaped magnetic core 10 is arranged in the inner Y-shaped groove.

[0032] In this embodiment, the magnetic ring assembly is placed on the Y-shaped seat 18 .

[0033] In this embodiment, the pins of the coil 11 pass through the bottom plate 17 and are fixed to the bottom plate 17 by glue. The glue is epoxy resin.

[0034] In this embodiment, the bottom plate 17 is provided with a coil slot 20 , and the coil 11 faces the coil slot 20 for heat dissipation.

[0035] In this embodiment, the coil 11 is formed by vertically winding flat copper wire. This high-temperature-resistant flat copper wire is directly wound around the magnetic ring assembly, facilitating automated production. The inner nanocrystalline ring 12 and silicon steel ring 13 are also unaffected by stress, resulting in more stable product performance. The flat copper wire provides improved heat dissipation and lowers temperature rise. For a given volume, the vertical winding method achieves higher power output.

[0036] In this embodiment, the Y-shaped magnetic core 10 is connected to the collar by glue, which is epoxy resin.

[0037] In summary, the present invention provides a novel differential and common mode integrated magnetic combination inductor, which has the following technical effects:

[0038] (1) It adopts flat copper wire vertical winding. By designing different conductor areas of copper wire, the power can reach 0W-500KW, and can withstand 0A-350A current, which makes it easy to realize automatic winding.

[0039] (2) The magnetic ring assembly uses silicon steel sheet rings and nanocrystalline rings to support the differential mode and common mode inductors. Combining the silicon steel sheet rings and nanocrystalline rings in the ring can effectively reduce space occupation. Moreover, since the common mode inductor and the differential mode electromagnetic are integrated into one product, compared with two independent products, it can effectively reduce the production steps and materials, effectively saving costs.

[0040] (3) The base adopts a tray-like structure to fix the annular magnetic ring assembly and the Y-shaped magnetic core on the base. At the same time, the base is made of high-temperature resistant 155℃ FR530 material, which can withstand high temperatures and adapt to relatively harsh working environments.

[0041] (4) The fixing glue adopts epoxy resin which is resistant to high temperature, has high bonding strength, strong shear force and low stress, and can be used in harsh environments.

[0042] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A novel differential and common mode integrated magnetic combination inductor, characterized in that: include: A base, a Y-shaped magnetic core and a magnetic ring assembly mounted on the base, and three groups of coils; the magnetic ring assembly includes: a nanocrystalline ring, a silicon steel sheet ring arranged inside the nanocrystalline ring, an insulating sheet sandwiched between the nanocrystalline ring and the silicon steel sheet ring, and a ring wrapping the nanocrystalline ring, the silicon steel sheet ring, and the insulating sheet; the Y-shaped magnetic core is arranged inside the magnetic ring assembly, and the distance between the Y-shaped magnetic core and the silicon steel sheet ring is equal; the Y-shaped magnetic core divides the magnetic ring assembly into three magnetic stripe areas, and the three groups of coils are respectively wound around one magnetic stripe area.

2. The novel differential and common mode integrated magnetic combination inductor according to claim 1, characterized in that: The collar comprises an upper cover and a lower cover matched with the upper cover.

3. The novel differential and common mode integrated magnetic combination inductor according to claim 1, characterized in that: The base includes: a bottom plate, a Y-shaped seat connected to the bottom plate, and an inner baffle connected to the Y-shaped seat; the Y-shaped seat and the inner baffle form an inner Y-shaped groove, and the Y-shaped magnetic core is arranged in the inner Y-shaped groove.

4. The novel differential and common mode integrated magnetic combination inductor according to claim 3 is characterized in that: The magnetic ring assembly is placed on the Y-shaped seat.

5. The novel differential and common mode integrated magnetic combination inductor according to claim 3 is characterized in that: The pins of the coil pass through the bottom plate and are fixed to the bottom plate by glue.

6. The novel differential and common mode integrated magnetic combination inductor according to claim 3, characterized in that: The bottom plate is provided with a coil slot, and the coil passes through or faces the coil slot.

7. The novel differential and common mode integrated magnetic combination inductor according to claim 1, characterized in that: The coil is formed by vertically winding a flat copper wire.

8. The novel differential and common mode integrated magnetic combination inductor according to claim 1, characterized in that: The Y-shaped magnetic core is connected to the collar by glue.

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